CN112244948A

CN112244948A - Interventional instrument and adsorption head thereof

Info

Publication number: CN112244948A
Application number: CN202010946663.8A
Authority: CN
Inventors: 王云兵; 吴智明; 邵南; 訾振军
Original assignee: Hangzhou Derk Medical Technology Co ltd
Current assignee: Hangzhou Derk Medical Technology Co ltd
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2021-01-22
Anticipated expiration: 2040-09-10
Also published as: CN112244948B

Abstract

The application discloses intervene absorption head of apparatus, it has relative distal end and near-end and is equipped with the working chamber in the distal end side to adsorb the head, adsorb the head seted up with the working chamber intercommunication is used for the absorption mouth that is used for with adsorbate looks effect, the near-end side of adsorbing the head seted up with the absorption passageway and the operation passageway of working chamber intercommunication. The application still discloses have the intervention apparatus of adsorption head, all cavities homoenergetic production adsorption affinity in the working chamber prevent to push up because of the puncture and lead to adsorption head and tissue organ separation to the built-in passageway that supplies endoscope and pjncture needle to use has improved the accuracy of operation.

Description

Interventional instrument and adsorption head thereof

Technical Field

The invention relates to the technical field of medical treatment, in particular to an adsorption head of an interventional instrument and the interventional instrument with the adsorption head.

Background

In many surgeries requiring precise manipulation, how to keep medical instruments in a stable state with respect to a living body has been a medical problem. For example, in cardiac surgery, the difficulty of the operation is greatly increased because the heart cannot be suspended during the operation and the operation is always performed on the moving heart.

In practice, this presents a difficult problem for the physician to perform cardiac puncture and post-puncture infusion of compounds, since the heart is in a beating state. Because the heart is in a beating state, the puncture needle is easy to slip when puncturing due to the fluctuation of the heart, and further deviates from a target point, so that the difficulty of more stably operating the heart by operation instruments such as the puncture needle, an endoscope and the like is solved.

Despite the prior art disclosures of solutions, such as remote use of suction devices and the like, there is still a need for improved positioning.

Disclosure of Invention

The application provides an intervene instrument's absorption head can improve intervene instrument's positioning accuracy and effect.

The adsorption head of the interventional instrument is provided with a far end and a near end which are opposite, a working cavity is arranged on the far end side, the adsorption head is provided with an adsorption port which is communicated with the working cavity and used for acting with an adsorbed object, and an adsorption channel and an operation channel which are communicated with the working cavity are arranged on the near end side of the adsorption head; the opening part of the adsorption port is a communication area or is divided into a plurality of unit areas.

The adsorption channel and the operation channel are communicated with each other in the adsorption head through the working cavity, the vacuum adsorption force generated by the adsorption channel is directly transmitted to the operation channel, the tissue position around the puncture point can be kept when puncture is carried out, and the puncture position is deviated or falls off relative to the adsorption head, so that the accuracy of the puncture position is ensured.

If the vacuum adsorption part is positioned in two mutually isolated areas relative to the puncture point, the adsorption effect is difficult to ensure, the deformation of tissues around the puncture point can influence the prejudgment of the puncture depth, the due treatment effect cannot be achieved, and even the operation failure is caused.

The working cavity is an operation space for the internal device of the adsorption head, is arranged at the far end of the adsorption head and can provide enough installation space for the arrangement of other components.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Optionally, the arrangement of the working chamber is as follows:

a body cavity, or

Include a plurality of sub-chambeies at the inside mutual intercommunication of adsorption head, adsorb passageway and operation passageway respectively with the sub-chamber intercommunication that corresponds, the absorption mouth communicates at least the sub-chamber at operation passageway place.

A plurality of sub-chamber are inside to communicate with each other for all sub-chambers in the working chamber all can be through and adsorb the passageway intercommunication, reach vacuum state through suction device, rely on inside and outside pressure difference to form the adsorption affinity and adsorb in the adsorbate, avoid moving because of the top of pjncture needle and lead to the adsorption head to break away from the adsorbate. Preferably, the working chamber can also be a body cavity, i.e. there is enough space for arranging the auxiliary components, and the problem of blockage caused by the narrow communication part can also be avoided.

Optionally, a partition plate is arranged between the two sub-cavities adjacent to each other, and the two sub-cavities adjacent to each other are communicated with each other through a through hole formed in the partition plate, or the two sub-cavities adjacent to each other are communicated with each other through a pipeline.

All the adsorption ports generate adsorption force. Compared with the existing adsorption head, the adsorption head avoids the influence on the operation caused by the fact that the adsorption head is separated from an adsorbate due to the pushing action of the puncture needle during the puncture operation.

Optionally, the edges of the adsorption port are in the same plane or in an arc surface recessed towards the inside of the adsorption port in the middle.

The adsorbed object protrusion is attached to the cambered surface after extending into the adsorption port, and the object is prevented from being scratched.

Optionally, a sealing lip for abutting against an adsorbed object is convexly arranged on the periphery of the adsorption port; the sealing lip is annular and is provided with an outward flange.

The seal lip is mainly used for better isolating the outside air and the liquid from entering the working cavity when the adsorption port is attached to the surface of the adsorbate, and preventing the adsorption head from being separated from the adsorbate after the outside air enters. This further increases the contact area with the adsorbate.

Optionally, the plurality of unit areas are formed in a regularly distributed grid structure.

Optionally, the plurality of unit regions are configured in a random porous structure.

The height of the adsorbed object protruding into the adsorption port is reduced, the surface of the adsorbed object is protected from being scratched, and meanwhile, the control of the puncture depth is more accurate.

Optionally, a communication part of the operation channel and the working chamber is a first communication port, and the first communication port is located on one side, far away from the adsorption port, of the working chamber.

The first communication port is a channel port of the puncture needle entering the working cavity, the puncture needle needs to bend and tilt towards the adsorption port after entering the working cavity, and in order to ensure a better puncture angle, enough bending and tilting space needs to be reserved, so that the position of the first communication port is far away from one side of the adsorption port as far as possible.

Optionally, the distal end side of the inner wall of the working chamber is a guide portion, and the guide portion is gradually bent from the first communication port to the distal end side of the suction port.

Provides bending guide for the puncture needle, reduces the friction resistance of the puncture needle during movement, and is convenient for operators to operate.

Optionally, in the adsorption head, the extending direction from the distal end to the proximal end is used as the axial direction of the adsorption head, and the adsorption port is opened at one side of the radial direction of the adsorption head.

The puncture needle can be conveniently directly extended out of the adsorption head to puncture after turning, and the whole far end of the interventional device can also assist in turning so as to adapt to interventional paths or fine control and find target points.

Optionally, the turning angle of the bending transition of the guide part is 75-100 degrees relative to the axial direction of the adsorption head.

The puncture angle of the puncture needle is ensured, and the guide tube can be firmly fixed in the guide part.

Optionally, the working chamber is a body cavity, the communication portion of the adsorption passage and the working chamber is a second communication port, and the first communication port and the second communication port are both located on the proximal end side of the inner wall of the working chamber.

The second communicating port is close to the design of the adsorption port, so that when the vacuum tube extends into the working cavity, the vacuum tube is close to the adsorption port as much as possible, in the operation process, the medium in the working cavity is sucked from the bottom, and the medium is sucked from a lower position, so that the cleanness of the working cavity is kept as much as possible.

Optionally, an endoscope channel and a cleaning channel respectively communicated with the working cavity are further arranged on the proximal end side of the adsorption head.

The endoscope channel is used for placing an endoscope for observing the condition in the working cavity, is beneficial to the operation of an operator, and is also provided with a cleaning channel for placing a cleaning pipeline for cleaning the endoscope.

Optionally, in the adsorption channel, the operation channel, the endoscope channel and the cleaning channel, the channels are independent from each other or at least two of the channels are closed and communicated, and the channels are formed in the following manners:

a channel is formed by opening a hole on the adsorption head, the far end of the hole is communicated with the working cavity, and the near end of the hole is opened to be in butt joint with an external pipeline;

or a pipeline is arranged in the opening in a penetrating way, the far end of the pipeline is communicated with the working cavity, and the near end of the pipeline extends out of the adsorption head.

The adsorption channel, the operation channel, the endoscope channel and the cleaning channel can be mutually independent or at least two channels can be connected together according to the actual situation and the connection mode of the near end, and various channel arrangement schemes are provided.

Optionally, the interventional instrument comprises:

an inner needle tube which is slidably arranged in the operation channel, wherein the distal end of the inner needle tube can extend out of or retract into the adsorption port;

a sheath connected to the adsorption head;

a handle connected to a proximal end of a sheath, the suction channel and the manipulation channel each extending through the sheath to the handle.

The handle can control the position of the adsorption head in the body and operate the sliding puncture of the inner needle tube in vitro, all the controls are arranged in the handle in a penetrating way through the pipeline, and part of the pipeline continuously extends out of the handle to be connected with auxiliary equipment. All pipelines are protected by sheaths, and the sheaths also provide bending transition and support for the adsorption head.

Optionally, the interventional instrument further comprises an outer needle tube located in the sheath, a distal end of the outer needle tube is fixedly butted with or fixedly extended in the operation channel, and a proximal end of the outer needle tube is extended and fixed to the handle;

the handle is movably provided with a driving piece, the inner needle tube is arranged in the outer needle tube in a penetrating mode in a sliding mode, the near end of the inner needle tube extends out of the outer needle tube and is linked with the driving piece, and the inner needle tube and the outer needle tube are arranged in a sealing mode in the radial gap.

The gap between the outer needle tube and the inner needle tube is blocked, and the medium is prevented from permeating.

Optionally, a threading sleeve is fixed in the handle, the proximal end of the outer needle tube extends into the threading sleeve and is in fixed sealing fit with the inner wall of the threading sleeve, the proximal end of the inner needle tube sequentially extends out of the outer needle tube and the threading sleeve and then is connected to the driving member, and the inner needle tube is in sliding sealing fit with the inner wall of the threading sleeve.

The gap between the outer needle tube and the inner needle tube is sealed, so that the medium in the working cavity is prevented from permeating into the handle, and the sliding puncture of the inner needle tube is not influenced.

This application intervenes adsorption head of apparatus, all cavities homoenergetic produce strong adsorption affinity, when the puncture top is moved, the difficult condition that breaks away from the tissue organ that appears takes place.

Specific advantageous technical effects will be further explained in conjunction with specific structures in the detailed description.

Drawings

FIG. 1 is a schematic view of an interventional instrument according to the present application;

FIG. 2 is a schematic view of a needle configuration of the interventional instrument of the present application;

FIG. 3 is a schematic view of a variation of the needle of FIG. 2;

FIG. 4 is a perspective view of a suction head of the interventional instrument of the present application;

FIG. 5 is a perspective view of a suction head of the interventional instrument of the present application;

FIG. 6 is a schematic view of a suction head of the interventional instrument of the present application;

FIG. 7 is a radial cross-sectional view of a suction head of the interventional instrument of the present application;

FIG. 8 is an enlarged view of portion A of FIG. 7;

FIG. 9 is a rear view of the suction head of the interventional instrument of the present application;

FIG. 10 is an axial cross-sectional view of a suction head of the interventional instrument of the present application;

FIG. 11 is a schematic view of a puncturing procedure of an absorption head of the interventional instrument of the present application;

FIG. 12 is a schematic view of another embodiment of FIG. 11;

FIG. 13 is a schematic view of the connection between the sheath and the suction head of the interventional device of the present application;

FIG. 14 is an elevation view of a sheath of an interventional instrument of the present application;

FIG. 15 is an enlarged view of portion B of FIG. 14;

FIG. 16 is a front view of the alternate embodiment of FIG. 14;

FIG. 17 is an enlarged view of portion B of FIG. 16;

FIG. 18 is a schematic view of a sheath of the interventional device of the present application;

FIG. 19 is a schematic view of a retaining ring of the interventional instrument of the present application;

FIG. 20 is an enlarged view of portion A of FIG. 19;

FIG. 21 is a schematic view of the placement of a pull wire in the interventional instrument of the present application;

FIG. 22 is a schematic view of a variation of the fixation ring of the interventional instrument of the present application;

FIG. 23 is a schematic view of a variation of the suction head of the interventional instrument of the present application;

FIG. 24 is a schematic view of another variation of a suction head in the interventional instrument of the present application;

FIG. 25 is a schematic cross-sectional view of a suction head of the interventional instrument of the present application;

FIG. 26 is a schematic view of a suction head of the interventional instrument of the present application;

FIG. 27 is a schematic view of the liner, retaining ring, and sheath arrangement of the interventional instrument of the present application;

fig. 28 is a partial schematic structural view of the interventional instrument of fig. 1;

FIG. 29 is an exploded view of the handle structure of FIG. 17;

FIG. 30 is a view showing the structure of FIG. 17 with a rotary knob omitted;

FIG. 31 is a schematic view of the mounting ring installed within the sheath;

FIG. 32 is a schematic view of the mounting ring installed within the sheath;

FIG. 33 is an enlarged view of the portion B of FIG. 32;

FIG. 34 is a schematic structural view of the drive plate of FIG. 29;

FIG. 35 is a schematic structural view of the drive plate of FIG. 29;

FIG. 36 is a schematic view of the structure of the drive plate and the pull wire;

FIG. 37 is an enlarged view of part A of FIG. 30;

FIG. 38 is a view showing the handle of FIG. 17 with a portion thereof omitted;

FIG. 39 is an enlarged view of the portion C of FIG. 38;

FIG. 40 is a schematic structural view of the support body of FIG. 38;

FIG. 41 is an exploded view of the handle structure in one implementation;

FIG. 42 is a schematic structural view of the second housing of FIG. 41;

FIG. 43 is a schematic structural view of the drive disc of FIG. 41;

FIG. 44 is a schematic view of the knob of FIG. 41;

FIG. 45 is an exploded view of the handle structure in one implementation;

FIG. 46 is a schematic structural view of the drive plate of FIG. 45;

FIG. 47 is an assembled view of the positioning member of the handle of FIG. 45;

FIG. 48 is a schematic view of a handle according to one embodiment;

FIG. 49 is an enlarged view of portion B of FIG. 48;

FIG. 50 is a cross-sectional view of a passing sleeve in an interventional device of the present application.

The reference numerals in the figures are illustrated as follows:

105. a locking mechanism; 11. a support body; 111. a guide groove; 112. a through hole; 113. a guide plate; 114. a support shoulder; 115. a limiting shoulder; 12. rotating the handle; 13. a second bend adjusting chamber; 14. a linkage member; 142. threading holes; 16. a mounting ring; 161. a rotating groove; 18. a first housing; 181. a second housing; 182. a first bend adjusting chamber; 183. an operation slot; 184. a rotation stopping groove; 185. an observation window;

50. a drive disc; 51. a drive handle; 52. a wire slot; 521. an arc-shaped section; 522. a turning section; 523. a wire inlet; 53. a positioning area; 54. a mounting member; 55. a locking groove; 56. a rotating shaft; 57. a deformation groove;

60. a first locking mechanism; 61. a knob; 611. a housing; 612. an action part; 613. a convex strip; 62. an elastic pad; 621. a rotation stop section; 63. a spacer; 631. an end plate; 64. connecting sleeves; 641. a drive slot;

70. a second locking mechanism; 71. a positioning member; 72. an elastic driving member; 73. mounting a column; 731. an anti-drop step;

300. a working chamber; 310. an adsorption port; 311. a sealing lip; 3111. flanging; 3112. flat veneering; 3113. an inner edge; 320. a guide section; 3201. a guide groove; 3202. a curved groove; 330. reinforcing ribs;

400. an adsorption channel; 410. a vacuum tube; 420. a second communication port;

500. an operation channel; 510. a first communication port;

600. puncturing needle; 610. a guide tube; 620. a needle head; 630. an inner needle tube; 640. an outer needle tube;

700. an endoscope channel; 710. an endoscope; 720. a fourth communication port;

800. cleaning the channel; 810. cleaning the tube; 820. a third communication port;

900. an adsorption head; 910. a sheath tube; 9101. a first unit segment; 9102. a second unit segment; 9103. a third unit segment;

920. a handle; 921. a drive member; 922. threading a sleeve; 9221. a first avoidance hole; 9222. a second avoidance hole;

930. drawing wires; 931. a first pull wire; 932. a second pull wire; 933. a third traction wire; 935. an isolation sleeve; 940. a fixing ring; 9401. positioning a groove; 950. a liner tube;

1000. an interventional instrument;

A. an origin; a1, one side of the first traction wire; a2, one side of the second traction wire; a3, on the side of the third traction wire.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In this application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any particular order or number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

As shown in fig. 1, the suction head 900 of the present application belongs to a partial structure of an interventional device 1000, and the interventional device 1000 further includes a handle 920 for controlling the suction head 900, and a sheath 910 for connecting the suction head 900 and the handle 920.

The interventional device 1000 sends the suction head 900 and the sheath 910 into the human body and moves to the vicinity of the tissue organ, and the movement of the suction head 900 and the operation of the internal devices of the suction head 900 (such as the puncture needle 600 and the endoscope 710) are controlled by the handle 920, so as to complete a series of treatment operations of searching a target point, absorbing, puncturing, injecting and the like. The interventional instrument 1000 may also be provided with auxiliary equipment (e.g., suction devices and cleaning devices) on the exterior thereof, which auxiliary equipment (not shown) is connected to the interior of the suction head 900 through a pipe or channel and assists the operation of the internal devices.

The inventors found that when the puncture operation is performed on a beating heart, the suction head 900 is detached from the adsorbate by the pushing movement of the puncture, and it is difficult to continuously and effectively suck the adsorbate to the heart. If the adsorption force is increased, the surface of the heart is easily damaged, the volume of the adsorption head 900 is increased, and the adsorption area is increased, but the movement in a narrow inner space is influenced.

For convenience of understanding, the proximal end is defined as the end near the handle 920 and the distal end is defined as the end far from the handle 920, and in terms of the suction head 900 itself, the direction extending from the distal end to the proximal end is the axial direction of the suction head 900, and the direction perpendicular to the axial direction is the radial direction.

As shown in fig. 4 to fig. 6, the adsorption head 900 of the present application has a distal end and a proximal end opposite to each other, and a working chamber 300 is disposed at the distal end, the adsorption head 900 is further provided with an adsorption port 310 communicated with the working chamber 300 for interacting with an adsorbate, an adsorption channel 400 and an operation channel 500 communicated with the working chamber 300 are disposed at the proximal end of the adsorption head 900, the working chamber 300 is in a vacuum state, and the adsorption head 900 is adsorbed on the surface of the adsorbate through the adsorption port 310. .

In this embodiment, the suction channel 400 and the operation channel 500 are communicated with each other through the working chamber 300 inside the suction head 900, and the vacuum suction force generated by the suction channel 400 is directly transmitted to the operation channel 500, so that the tissue position around the puncture point can be maintained during puncture, and the tissue position is shifted or dropped relative to the suction head, thereby ensuring the accuracy of the puncture position.

The working chamber 300 is an operation space for the internal devices of the suction head 900, and is provided at the distal end of the suction head 900 to provide a sufficient installation space for the arrangement of other components.

The adsorption channel 400 can be arranged along the axial direction and can also be arranged in a bending way, for convenience of processing, the cross section of the adsorption channel 400 is circular, a vacuum tube 410 which is matched with the adsorption channel 400 is arranged in the adsorption channel 400 in a penetrating way, one end of the vacuum tube 410 extends into the working cavity 300, the other end of the vacuum tube is arranged in the sheathing tube 910 in a penetrating way and is connected to a suction device, and a medium in the working cavity 300 is sucked through the suction device and is discharged out of the adsorption head 900. The operation channel 500 is a channel for installing the puncture needle 600.

As shown in fig. 4, in one embodiment, the working chamber 300 is arranged as an integral chamber or includes a plurality of sub-chambers communicated with each other inside the adsorption head 900, the adsorption passage 400 and the operation passage 500 are respectively communicated with the corresponding sub-chambers, and the adsorption port 310 is communicated with at least the sub-chamber where the operation passage 500 is located.

A plurality of sub-chamber are inside to communicate with each other for all sub-chambers in the working chamber 300 all can be through with adsorb passageway 400 intercommunication, reach vacuum state through suction device, rely on inside and outside pressure difference to form the adsorption affinity and adsorb in the adsorbate, avoid moving because of the top of pjncture needle 600 and lead to adsorption head 900 to break away from the adsorbate. Preferably, the working chamber 300 may also be a body chamber, i.e. there is enough space for arranging auxiliary components, and it is also possible to avoid the problem of blockage due to the narrow communication portion.

The inner wall of the working chamber 300 is provided with the reinforcing ribs 330, the reinforcing ribs 330 can extend axially, can also extend radially, and can also be arranged in a staggered manner, and the number of the reinforcing ribs 330 can be multiple, so that the deformation of the working chamber 300 due to pressure difference is prevented.

The adsorption port 310 is an opening of the working chamber 300, and has a rectangular or other closed ring shape, and when in operation, the adsorption port 310 is attached to the surface of the adsorbate to isolate the gas and liquid outside the adsorption head 900 from entering the working chamber 300, so that the working chamber 300 (except for the internal channel) forms a closed chamber.

When the arrangement mode of the working chamber 300 is a plurality of sub-chambers, in one embodiment, a partition plate is provided between two sub-chambers adjacent to each other, and the two sub-chambers adjacent to each other are communicated with each other through a through hole provided in the partition plate, or the two sub-chambers adjacent to each other are communicated with each other through a pipeline.

The partition plate is arranged perpendicular to the adsorption port 310, and the plurality of sub-chambers are separated to connect different channels, for example, the operation chamber is connected with the operation channel, and the adsorption chamber is connected with the adsorption channel. Interference between the chambers is avoided. Each chamber is communicated with each other through a pipeline or an opening, so that after the adsorption cavity is vacuumized, other chambers can be also vacuumized, and all the adsorption ports 310 generate adsorption force. Compared with the existing adsorption head, the adsorption head 900 is prevented from being separated from an adsorbed object due to the pushing of the puncture needle 600 during puncture operation, and the operation is prevented from being influenced.

Since the surface of the object is very easy to be damaged, the object protrudes into the absorption opening 310 during the absorption operation, and in order to avoid damaging the surface of the object, in one embodiment, the edges of the absorption opening 310 are located on the same plane or on a cambered surface with a central portion recessed toward the inner portion of the absorption opening.

The position of the cross-sectional shape of the adsorption port 310 close to the inner side of the adsorption port 310 is an arc surface, so that the adsorbed object is protruded into the adsorption port 310 and then attached to the arc surface, and the object is prevented from being scratched.

As shown in fig. 7 and 8, in one embodiment, a sealing lip 311 for abutting against an adsorbate is protruded from the outer periphery of the suction port 310, and the sealing lip 311 is annular and has a flange 3111.

The sealing lip 311 may be integrally formed with the suction port 310, or may be assembled as a separate component, and the cross-sectional shape thereof is a semicircular shape or other shape without a sharp corner, thereby preventing scratching of the object to be sucked. The sealing lip 311 is mainly used to better isolate the outside air and liquid from entering the working chamber 300 when the adsorption port 310 is attached to the surface of the adsorbate, so as to prevent the adsorption head 900 from separating from the adsorbate after the outside air enters.

The ring structure means that a path which is connected end to end and surrounds the periphery of the adsorption port 310 by one circle is formed, the outward extension of the ring structure is provided with the outward flange 3111, and the outward flange 3111 improves the contact area with an adsorbed object and more effectively blocks outside gas and liquid.

The outward flange 3111 may be of the same thickness or of different thicknesses throughout the extension process. As shown in fig. 8, in the preferred embodiment, the thickness gradually decreases from inside to outside, and the thickness tends to decrease rapidly, so that a thin flat surface 3112 is formed at the end to improve the deformation capability of the flat surface 3112 and the adhesion with the adsorbate. The flat surface 3112 is transitionally connected with the inner wall of the working chamber 300 through an inner edge 3113 of a smooth cambered surface, so that the adsorbed object is prevented from being scratched.

In one embodiment, the opening of the adsorption port 310 is a communication area or is divided into a plurality of unit areas.

When the depth of the partition plate does not extend to the plane of the adsorption port 310 or the working cavity 300 is an integrated cavity, the opening of the adsorption port 310 is a communication area, and all positions of the adsorption port 310 can generate adsorption force for adsorbing an adsorbate, so that the phenomenon that the adsorption head 900 falls off due to the pushing of puncture and the influence on the operation can be avoided.

When the depth of the partition extends to the same plane as the adsorption port 310, the adsorption port 310 is divided into a plurality of unit regions. When the vacuum is generated in the working chamber 300, the adsorbate will partially bulge into the adsorption port 310, resulting in uncertainty of the penetration depth. Therefore, the partition plates are arranged in a partition mode, the area of the adsorption port 310 of the operation cavity is reduced, and then the protrusion of an adsorbed object is reduced, so that the puncture operation is more accurate. And each chamber is communicated with each other, and the adsorption port 310 of each unit area can generate adsorption force, so that the phenomenon that the adsorption head 900 falls off due to the pushing of puncture to influence the operation is avoided.

In one embodiment, the plurality of unit regions are formed in a regularly distributed grid structure or a random porous structure.

The plane of the adsorption port 310 is provided with a flat plate with a grid structure or flexible cloth with a porous structure, and a puncture space is reserved in holes of the porous structure, so that the puncture of the puncture needle 600 is facilitated. And further separate absorption opening 310 for the height that the adsorbate arch stretched into absorption opening 310 reduces, protects the adsorbate, and simultaneously, the control of the depth of penetration is more accurate.

Since the operating space in the human body is limited, the puncture needle 600 should perform a bending puncture to reduce damage to the tissue organ. As shown in fig. 7, in one embodiment, the connection portion between the operation channel 500 and the working chamber 300 is a first connection port 510, and the first connection port 510 is located on a side of the working chamber 300 away from the adsorption port 310.

The first communication port 510 is a passage port of the puncture needle 600 into the working chamber 300, and the puncture needle 600 needs to be bent and tilted toward the suction port 310 after entering the working chamber 300, and in order to secure a preferable puncture angle, a sufficient bending and tilting space must be left, and for this reason, the first communication port 510 is located as far away from the suction port 310 as possible. In a preferred embodiment, one side of the suction port 310 is defined as the bottom of the suction head 900, and the first communication port 510 is disposed at the top of the suction head 900.

As shown in fig. 10 and 11, in one embodiment, the distal side of the inner wall of the working chamber 300 is a guiding portion 320, and the guiding portion 320 gradually bends and transitions from the first communicating opening 510 to the distal side of the suction opening 310.

As shown in fig. 2 and 3, in the present embodiment, the puncture needle 600 used in the suction head 900 of the present application includes a guide tube 610, a needle 620, an inner needle tube 630 and an outer needle tube 640, wherein the guide tube 610 is a hollow metal tube, the outer needle tube 640 is connected to the proximal end of the guide tube 610, or the outer needle tube 640 and the guide tube 610 are integrally formed.

Inner needle tube 630 is slidably mounted within outer needle tube 640 and needle 620 is attached to the distal end of inner needle tube 630, although needle 620 may be integral with inner needle tube 630. When the inner needle tube 630 is moved, the needle 620 is caused to change along the shape of the guide tube 610, facilitating the curved puncture.

The guiding portion 320 is an open slot, which opens to one side of the suction port 310, and the guiding portion 320 is divided into a front section and a rear section, wherein the front section is a guiding groove 3201 extending along the operation channel 500, and the rear section is a curved groove 3202 smoothly curved to the suction port 310 gradually and smoothly following the guiding groove 3201. The guide tube 610 of the puncture needle 600 is substantially in contact with the guide part 320, and has, for example, an arc shape or an elliptical arc shape.

The outlet end of the guide tube 610 may be spaced a distance from the absorbent opening 310, i.e., the needle 620 still remains in the working chamber 300 after extending out of the guide tube 610, and does not penetrate into the adsorbate, thereby facilitating observation and confirmation of the puncture point.

In a complicated operation process, when a tissue organ is punctured, an included angle is formed between the puncturing direction of the puncture needle 600 and a tangent plane (i.e., the plane where the adsorption port 310 is located) where a target point is located, and in order to protect the tissue organ, the puncturing depth is reduced as much as possible, i.e., the included angle is as close to 90 °. In one embodiment, the guide tube 610 is 1/4 arc or ellipse, i.e., at a 90 ° angle, such that the needle 600 pierces perpendicular to the surface of the adsorbate. The damage to the needle 620 is reduced and the length of the needle 620 penetrating the myocardial tissue is minimized, with minimal damage to the tissue and organs.

Due to the volume limitation of the puncture needle 600, the needle 620 has frictional resistance with the inner wall of the guide tube 610 in the sliding and bending process of the guide tube 610, and if the included angle is too large, the needle 620 is not easy to push and pull, and the puncture operation is affected. As shown in FIG. 12, in the preferred embodiment, the included angle is 45-60 degrees, so that the frictional resistance is reduced, and the operation of an operator is facilitated.

In one embodiment, the suction port 310 extends a distance proximally along its length (axial direction), and the suction port 310 is opened at one side of the suction head 900 in the radial direction.

Generally, a certain included angle is formed between the intervention path direction and the puncture direction of puncture, the curvature radius is larger when the distal end of the intervention instrument is integrally bent, the operation space is limited, the puncture needle 600 is thinner, and the curvature radius is smaller when the interventional instrument is bent, so that the puncture needle 600 is preferably adopted to turn to adapt to the puncture direction, and the adsorption head 900 is arranged on one radial side, so that the puncture needle 600 directly extends out of the adsorption head 900 to puncture after turning. Certainly, the whole far end of the interventional device can also assist in bending so as to adapt to an interventional path or fine control to find a target point.

In one embodiment, the turning angle of the bending transition of the guiding portion 320 is 75 to 100 degrees relative to the axial direction of the suction head.

The angle of rotation is the included angle between the line connecting the bending start point to the end point of the guiding part 320 and the axis of the operation channel 500, the angle of rotation is too small, the guiding tube 610 is easy to loosen, the outer needle tube 640 is not fixed firmly, and the outer needle tube 640 is easy to move synchronously with the inner needle tube 630 in the puncturing process, so that the puncturing operation is affected. The rotation angle is too large, which causes the sliding resistance of the needle 620 to be too large, and the operator can feel the sliding pause and the smoothness of the puncture is affected. Therefore, the angle of rotation is designed to be 75 to 100 degrees, the puncture angle of the puncture needle 600 is ensured to be 45 to 60 degrees, and the guide tube 610 can be firmly fixed in the guide part 320.

As shown in fig. 7, in one embodiment, the working chamber 300 is an integral chamber, the communication portion between the suction passage 400 and the working chamber 300 is a second communication port 420, and the first communication port 510 and the second communication port 420 are both located on the proximal end side of the inner wall of the working chamber 300.

The second communication port 420 is designed close to the suction port 310, so that when the vacuum tube 410 extends into the working chamber 300, the vacuum tube is as close to the suction port 310 as possible, during the operation, the medium in the working chamber 300 is sucked from the bottom, and the medium is sucked from a lower position, so that the working chamber 300 is kept as clean as possible.

As shown in fig. 5 and 6, in one embodiment, the proximal end side of the suction head 900 is further provided with an endoscope channel 700 and a cleaning channel 800 which are respectively communicated with the working chamber 300.

The endoscope channel 700 is provided with the endoscope 710 for observing the condition in the working cavity 300, the endoscope channel 700 is divided into a front section and a rear section, the rear section is arranged along the axial extension of the adsorption head 900, the front section is inclined or bent towards one side of the adsorption port 310 and communicated with the working cavity 300 compared with the rear section, and after the endoscope 710 is installed along the endoscope channel 700, the lens of the endoscope can be aligned to the adsorption port 310, so that a target point can be conveniently found and the condition in the working cavity 300 can be observed.

The cleaning channel 800 is used to deliver cleaning fluid for cleaning the working chamber 300 and the endoscope 710, and to keep the working chamber 300 and the endoscope 710 clean. During the operation, blood or other impurities contaminate the lens of the endoscope 710 and cannot observe the inside of the working chamber 300, so as to effectively keep the lens of the endoscope 710 clean. In one embodiment, the endoscope channel 700 communicates with the working chamber 300 through a fourth communication port 720, the cleaning channel 800 communicates with the working chamber 300 through a third communication port 820, and the third communication port 820 is arranged along one or more positions near the top of the periphery of the fourth communication port 720, and when necessary, the cleaning tube 810 slowly delivers cleaning liquid which cleans the endoscope 710 from top to bottom.

In another embodiment, the third communication port 820 may be arbitrarily arranged so that when the lens of the endoscope 710 is contaminated, the cleaning liquid fills the working chamber 300 through the cleaning channel 800 to clean the lens and the working chamber 300.

In another embodiment, the third communication port 820 is aligned with the lens of the endoscope 710, and directly outputs the cleaning solution to clean the lens.

After the cleaning, the endoscope 710 and the working chamber 300 are kept clean by sucking the liquid through the suction channel 400 by the suction device.

Regarding the spatial arrangement of the endoscope channel 700 and the cleaning channel 800, the radial direction of the suction head 900 is divided into three parts, namely a bottom part, a middle part and a top part, perpendicular to the direction of the suction port 310, the suction channel 400 is located at the bottom part, the operation channel 500 is located at the top part, and then the endoscope channel 700 is arranged at the middle part, so that the endoscope 710 can observe the operation of the puncture needle 600 and the visual field covered by the suction port 310.

As shown in fig. 5 and 11, in one embodiment, in the suction channel 400, the operation channel 500, the endoscope channel 700, and the cleaning channel 800, the channels are independent from each other or at least two of the channels are connected together, and the channels are respectively configured as follows: the adsorption head 900 is provided with a hole to form a channel, the far end of the hole is communicated with the working cavity 300, the near end of the hole is opened to be abutted with an external pipeline, or a pipeline is arranged in the hole in a penetrating way, the far end of the pipeline is communicated with the working cavity 300, and the near end of the pipeline extends out of the adsorption head 900.

The adsorption channel 400, the operation channel 500, the endoscope channel 700 and the cleaning channel 800 can be selected to be independent or at least two of the channels are connected together according to the actual situation and the connection mode of the near end, so that various channel arrangement schemes are provided.

The gas or liquid flowing through the adsorption channel 400 and the cleaning channel 800 can be transported by passing through a pipeline or connecting a sheath 910 at the proximal port thereof.

In one embodiment, when the adsorption channel 400 and the cleaning channel 800 are provided with pipes, the channels can be mutually connected and communicated and freely combined, but the cross section of each channel is shaped to ensure that at least three fixing points which play a role in fixing and guiding the installed equipment or pipes exist. For example, the cleaning channel 800 passes through the cleaning tube 810, the cleaning channel 800 is arranged in parallel with and communicates with the endoscope channel 700,

in another embodiment, when the adsorption channel 400 and the purge channel 800 directly flow gas or liquid, they must be independently arranged to avoid the flowing medium from mixing into other pipes and affecting the operation. For example, the cleaning channel 800 does not have the cleaning tube 810, and when the cleaning liquid directly flows through the cleaning channel, a separate pipeline is needed.

In one embodiment, the interventional device 1000 to which the suction head of the present application is applied further includes an inner needle tube 630 slidably mounted in the operation channel 500, a distal end of the inner needle tube 630 being capable of extending out of or retracting into the suction port 310, a sheath 910 connected to the suction head 900, and a handle 920 connected to a proximal end of the sheath. The suction channel 400 and the operation channel 500 each extend to the handle 920 via the sheath 910.

The handle 920 can control the position of the absorption head 900 in the body and operate the sliding puncture of the inner needle tube 630 outside the body, and all the controls are inserted into the handle 920 through pipelines, wherein part of the pipelines continue to extend out of the handle 920 to connect auxiliary equipment. All lines are protected by sheath 910, and sheath 910 also provides the curved transition and support for the suction head.

The sheath 910 is substantially cylindrical, and may be formed by combining a plurality of sections in order to obtain corresponding rigidity at different positions, and each section may have a single-layer structure or a multi-layer composite structure. In one embodiment, the sheath 910 comprises, in order from the distal end to the proximal end, a first unit segment 9101, a second unit segment 9102, and a third unit segment 9103. The first unit section 9101 is connected with the adsorption head 900, and the hardness of the material is the softest in the three sheath tubes, for example, Pebax 3533 is adopted, so that the adsorption head 900 is convenient to move.

The hardness of the material of the third unit segment 9103 is the hardest in the three sheath tubes, and the hardness can be improved by increasing the wall thickness or selecting a material with higher hardness, for example, Pebax7233 is adopted, so that large-scale quick movement is realized, sufficient axial pushing force is provided, and the operation is convenient.

The hardness of the second unit segment 9102 is between that of the first unit segment 9101 and that of the third unit segment 9103, for example, Pebax4033 is adopted, and the function of transition connection is achieved.

In order to ensure the ductility and strength of the sheath 910, in a preferred embodiment, the sheath 910 is designed with three layers, which are polyurethane, woven mesh structure and PTFE material from the outside to the inside.

A plurality of pipelines are arranged in the sheath 910 in a penetrating manner, one end of the pipeline extends into the adsorption head 900, the other end of the pipeline passes through the handle 920 and continues to extend out of the handle, and the pipeline is connected with corresponding devices (such as a suction device, a cleaning device, a puncture needle and the like). Of course, the sheath 910 may be provided with a plurality of channels to replace the connecting function of the pipeline.

As shown in fig. 48 and 49, in one embodiment, the interventional instrument 1000 further comprises an outer needle tube 640 disposed within the sheath 910, a distal end of the outer needle tube 640 fixedly abutting or extendedly fixed within the operation channel 500, and a proximal end of the outer needle tube 640 extending and fixed to the handle 920;

a driving piece 921 is movably installed on the handle 920, the inner needle tube 630 is slidably arranged in the outer needle tube 640, the proximal end of the inner needle tube 630 extends out of the outer needle tube 640 and is linked with the driving piece 921, and the radial gap between the inner needle tube 630 and the outer needle tube 640 is sealed.

The distal and proximal ends of the outer needle cannula 640 are fixed to form a sliding guide path for the inner needle cannula 630 to slide. The driving member 921 is partially exposed from the handle 920 for operation by an operator. The part of the needle stick extends into the handle 920 to be bonded and fixed with the inner needle tube 630, and the operator pulls the inner needle tube 630 along the outer needle tube 640 to complete the sliding puncture through the driving piece 921 outside the handle 920.

And after the vacuum is generated in the working chamber 300, the medium in the working chamber 300 is easy to reversely permeate into the handle 920 from the gap between the inner needle tube 630 and the outer needle tube 640, so that the radial gap between the inner needle tube 630 and the outer needle tube 640 in the handle 920 is sealed, and the medium is prevented from permeating into the handle 920. The sealing arrangement may be to directly fill the gap, or to provide a stopper to block the end face of the outer needle tube 640, and to be in clearance fit with the inner needle tube 630 to block the gap and prevent the medium from permeating.

As shown in FIG. 50, in one embodiment, a threading sleeve 922 is fixed in the handle 920, the proximal end of the outer needle tube 640 extends into fixed sealing engagement with the threading sleeve 922 and with the inner wall of the threading sleeve 922, the proximal end of the inner needle tube 630 extends out of the outer needle tube 640 and the threading sleeve 922 in sequence and is connected to the driving member 921, and the inner needle tube 630 is in sliding sealing engagement with the inner wall of the threading sleeve 922.

The threading sleeve 922 is fixed with the handle 920 in an adhesive mode, the threading sleeve 922 is provided with a first avoiding hole 9221 matched with the outer needle tube 640 and a second avoiding hole 9222 matched with the inner needle tube 630, the first avoiding hole 9221 and the second avoiding hole 9222 are concentric, and the second avoiding hole 9222 is located behind the first avoiding hole 9221. The near end of the outer needle tube 640 extends into the first avoiding hole 9221 and is fixed in the threading sleeve 922 through gluing, the step surface of the second avoiding hole 9222 abuts against the end surface of the outer needle tube 640, the inner wall of the second avoiding hole 9222 is tightly matched with the inner needle tube 630, and then the gap between the inner needle tube 630 and the outer needle tube 640 is sealed. The medium in the working chamber 300 is prevented from permeating into the handle 920, and the sliding penetration of the inner needle tube 630 is not affected.

In order to realize that the adsorption head 900 can realize free flexibility and multidirectional bending adjustment in a narrow operation space, the requirements of different operation functions are met. Wherein the bending of the adsorption head 900 relies on the first unit segment 9101 fixed at the proximal end of the adsorption head 900 through a thermal shrinkage process.

As shown in fig. 13 to 17, in one embodiment, a fixing ring 940 is disposed in the sheath 910 and adjacent to the distal end thereof, the fixing ring 940 is deformed and/or partially cut on the inner edge or the outer edge thereof to form a plurality of positioning grooves 9401, the positioning grooves 9401 are circumferentially spaced apart from each other along the fixing ring 940, the number of the pull wires 930 is three or more, and the distal end of each pull wire 930 is inserted into and fixed to the corresponding positioning groove 9401.

In this embodiment, more than three traction wires 930 are provided, for example, three or four traction wires 930 are provided, and each traction wire 930 is circumferentially distributed at intervals, so that the orientation of the distal end of the sheath tube can be changed when one traction wire is pulled, the direction can be controlled more when a target point is found and other operations are performed, and the orientation of the distal end of the sheath tube can be changed rapidly to meet the expected posture, furthermore, because the number of the traction wires 930 is large, further requirements are provided for the connection strength between the traction wires 930 and the sheath tube 910, in this embodiment, the distal ends of all the traction wires 930 are connected at one time by adopting a fixing ring mode, the fixing ring 940 is connected with the sheath tube 910 by a hot melting mode, so that the strength can be ensured, potential safety hazards can be eliminated, and more importantly, the coordination and.

The fixing ring 940 is circular, the outer circumferential surface of the fixing ring is matched with the inner wall of the sheath tube, and the sheath tube 910 is shrunk to tightly wrap the fixing ring 940 through a thermal shrinkage process.

The number of the positioning grooves 9401 is the same as that of the traction wires 930, namely, at least three positioning grooves 9401 are formed, the positioning grooves 9401 axially extend to the bottom along the fixing ring 940, the traction wires 930 are conveniently penetrated and embedded in the positioning grooves 9401 in a clamping manner, and the positioning effect of primarily installing the traction wires is achieved. The positioning groove 9401 and the traction wire 930 are fixed to each other by spot welding. The positioning groove 9401 may be obtained by machining or may be integrally stamped with the fixing ring 940.

In one embodiment, the fixing ring 940 has a plurality of radially outwardly protruding or inwardly recessed deformation portions distributed at intervals along the circumferential direction, and the deformation portions form positioning grooves 9401 at the inner side or the outer side of the fixing ring 940.

The deformation part is formed by the self deformation of the fixing ring 940 protruding or recessing and is integrally processed, the number of parts is small, the assembly is not needed, the use of raw materials can be saved, and the efficiency can be improved. When the deformation portion protrudes outward, the deformation portion is a positioning groove 9401 on the inner side of the fixing ring 940, and when the deformation portion is recessed inward, the deformation portion is a positioning groove 9401 on the outer side of the fixing ring 940. The smooth transition of the deformation portion and other portions of the fixing ring 940 improves the structural strength of the fixing ring 940, and the smooth transition can prevent the traction wire 930 or other adjacent components from being scratched.

In one embodiment, the retaining groove 9401 has a U-shaped cross-section and a depth corresponding to the diameter of the pull wire 930.

The cross-sectional shape of the positioning groove 9401 is adapted to a portion of the outer edge of the pull wire 930, and has an opening, so that the pull wire 930 can be directly inserted and mounted in the radial direction of the fixing ring 940. In a preferred embodiment, the positioning groove 9401 is recessed, the depth of the groove of the positioning groove 9401 enables the surface of the fixing ring 940 to have no convex point after the traction wire 930 is installed, and the depth of the positioning groove 9401 is the same as the diameter of the traction wire 930, so that the outer surface of the sheath 910 is smooth after the sheath 910 is fixed by thermal shrinkage.

As shown in fig. 18-20, in one embodiment, the pull wires 930 are externally sleeved with an isolation sleeve 935, the isolation sleeve 935 is fixedly disposed relative to the sheath 910, and the pull wires 930 are slidably fitted relative to the isolation sleeve 935.

The isolation sleeve 935 is a hollow circular tube, the outer peripheral surface of the isolation sleeve 935 is fixed with the sheath 910 by gluing or hot melting, the melting point of the isolation sleeve 935 is larger than that of the sheath 910, and when the sheath 910 is subjected to hot melting operation, the isolation sleeve 935 still maintains its shape to allow the relative sliding of the traction wire 930. The pull wire 930 can slide along the inner hole of the isolation sleeve 935, so that circumferential dislocation of the pull wire 930 is avoided, and the sheath 910 can be prevented from being cut after the pull wire 930 is tightened.

In one embodiment, the isolation sleeve 935 is attached to and fixed to the inner wall of the sheath 910, or the liner 950 is thermally fused to the inner wall of the sheath 910, and the isolation sleeve 935 is fixed in the interlayer between the sheath 910 and the liner 950.

Liner tube 950 is hollow pipe, and the hole wears to establish other parts as the passageway, and liner tube 950 periphery is used for supporting insulating sleeve 935, relies on fixed sheath pipe 910 of pyrocondensation again for insulating sleeve 935 is by the centre gripping fixed, can improve joint strength and prevent unnecessary dislocation. Liner 950 separates the other internal components from insulating sleeve 935, protecting insulating sleeve 935, and further protecting pull wires 930. Through the adapted tooling, the isolation sleeve 935 can be fixed on the outer periphery of the liner tube 950 by gluing in advance, so as to be further fixed with the sheath 910 by hot melting.

As shown in fig. 27, in one embodiment, the outer circumference of the fixing ring 940 is attached to the inner wall of the sheath 910, or the liner 950 is thermally fused on the inner wall of the sheath 910, and the fixing ring 940 is fixed in the interlayer between the sheath 910 and the liner 950.

The liner tube 950 is penetrated through the tool in advance, the fixing ring 940 is sleeved on the outer wall of the liner tube 950, the liner tube and the fixing ring are in clearance fit, the gap is coated with glue and fixed, the sheath tube 910 is sleeved on the outermost layer, the sheath tube 910 is shrunk through a heat shrinkage process to combine the liner tube 950, the fixing ring 940 is clamped and fixed by the liner tube 950 and the sheath tube 910, the opening of the positioning groove 9401 can be sealed and the traction wire 930 is shielded inside the positioning groove 9401 no matter the traction wire 930 is positioned on the outer side or the inner side of the fixing ring 940, the strength can be improved in a clamping and fixing mode, and the phenomenon that the local stress is large and.

In one embodiment, as shown in fig. 21, there are three pull wires 930, and each pull wire 930 extends in the axial direction of the sheath 910.

The distal ends of the pull wires 930 are fixedly installed in the corresponding positioning grooves 9401, for example, three pull wires 930 are sequentially distributed along the circumferential direction, and the central angle of each adjacent pull wire 930 is 90 degrees. Because the adsorption head 900 needs to be bent in at least three directions to meet the requirements of surgical operation, the number of the corresponding traction wires 930 is set to be three, and the traction wires are distributed in the fixing ring 940 at 90 degrees, so that the assembly difficulty is increased due to the excessive number of the traction wires 930.

Of the three traction wires 930, a first traction wire 931 and a second traction wire 932 are disposed diametrically opposite each other along the sheath 910, and a third traction wire 933 is disposed between the first traction wire 931 and the second traction wire 932 in the circumferential direction of the sheath.

The first traction wire 931 and the second traction wire 932 are arranged oppositely along the radial direction of the sheath 910, the third traction wire 933 is located between the first traction wire 931 and the second traction wire 932 on the circumferential direction of the sheath 910, each traction wire 930 controls bending in one direction, and the three traction wires 930 realize bending in three radial directions. The specific position relationship of the three can also be matched with the structure and the use characteristics of the adsorption head 900, the adsorption head 900 can be more finely controlled to change the position in the positioning process or when the treatment position is switched, and the pitching attitude of the adsorption head 900 is further controlled on the basis of conventional bidirectional swinging.

The first traction wire 931 and the second traction wire 932 have a mutual linkage relationship, and the linkage relationship is that when the first traction wire 931 slides towards the proximal end, the second traction wire 932 slides towards the distal end, so that the first traction wire 931 and the second traction wire 932 are prevented from being reversely stretched when bending is adjusted, and not only is bending resistance increased, but also potential safety hazards exist.

As shown in fig. 21 to 24, when bending is performed, only the first pulling wire 931 is pulled, and accordingly, the second pulling wire 932 slides distally, so that the fixing ring 940 is driven to move from the origin a to the side a1 close to the first pulling wire.

For another example, only the second pulling wire 932 is pulled, and accordingly, the first pulling wire 931 slides distally, driving the fixing ring 940 to move from the origin a to the side a2 close to the second pulling wire.

For another example, when only the third pull wire 933 is pulled, the three pull wires 930 are bent to the point A3, and the fixing ring 940 is driven to move from the origin a to the third pull wire side A3.

When the operator releases the restriction of the pull wire 930 by the handle 920, the sheath 910 is restored by its own elasticity, but a shaping member may be provided in the sheath 910 to help the sheath 910 to be restored.

In one embodiment, the orientation of the suction port 310 coincides with the circumferential position of the third pull wire 933 relative to the sheath 910.

The adsorption head 900 depends on the third traction wire 933 to complete the bending action to one side of the adsorption port 310, and is closer to the adsorbate, so that the subsequent adsorption is conveniently completed, and the adsorption is firmer. Accordingly, the first and

second traction wires

931 and 932 are responsible for the bilateral bending and can match the endoscope 710 to find the target point.

The bending operation of the pull wire 930 is performed by the handle 920, and the specific internal structure of the handle 920 and how to control the pull wire 930 are as follows:

as shown in fig. 29 and 30, the handle 920 has a first bending adjustment chamber 182 and a second bending adjustment chamber 13 therein, the driving disk 50 is rotatably mounted in the first bending adjustment chamber 182, and the link 14 is slidably mounted in the second bending adjustment chamber 13;

the traction wire 930 includes a first traction wire 931, a second traction wire 932 and a third traction wire 933, the proximal ends of the first traction wire 931 and the second traction wire 932 are connected to the driving disc 50, and the proximal end of the third traction wire 933 is connected to the link 14;

the driving disc 50 drives the first traction wire 931 and the second traction wire 932 to move in opposite directions synchronously when rotating, so that the first traction wire 931 and the second traction wire 932 are prevented from generating reverse stretching when bending the sheath 910, the bending resistance of the sheath 910 is caused, potential safety hazards exist, and more bending angles are provided for the bending of the sheath 910.

In the present application, the distal end of the sheath 910 is bent by the first traction wire 931, the second traction wire 932 and the third traction wire 933, and the bending directions of the sheath 910 by the traction wires 930 are different, so that the bending range of the distal end of the sheath 910 is wider; meanwhile, each traction wire 930 can respectively bend the distal end of the sheath 910, so that the operator can adjust the bending direction of the sheath 910 more flexibly.

The distal end of the sheath 910 bends and simultaneously drives the adsorption head 900 to bend towards a fixed direction, so that the adsorption head 900 avoids the tissue and the organ, and the damage to the tissue and the organ is reduced.

After the operator releases the handle 920, the first pulling wire 931, the second pulling wire 932 and the third pulling wire 933 release the restriction on the sheath 910, and the sheath 910 is automatically reset or reset by the inner shape-defining piece disposed on the sheath 910.

The handle 920 further comprises a locking mechanism 105 for locking or releasing the driving disc 50, the operator controls the driving disc 50 to drive the traction wire 930 when the driving disc 50 rotates, the traction wire 930 drives the distal end of the sheath 910 to bend, when the distal end of the sheath 910 is bent to a predetermined position, the locking mechanism 105 abuts against the driving disc 50 to lock the driving disc 50, so that the driving disc 50 is prevented from being touched by external acting force by mistake, the driving disc 50 rotates, and the bending angle of the distal end of the sheath 910 can be influenced.

When the driving disc 50 on the handle 920 rotates to drive the first traction wire 931 and the second traction wire 932, the distal end of the sheath 910 is bent by the first traction wire 931 and the second traction wire 932, and when the distal end of the sheath 910 is bent to a predetermined position, the driving disc 50 is locked by the locking mechanism 105, so as to avoid the external force from touching the driving disc 50 by mistake, which causes the driving disc 50 to rotate, and the distal end of the sheath 910 is affected by the bending angle.

The driving disk 50 is rotatably installed in the first bending chamber 182 by a rotating shaft, and the axis of the rotating shaft is perpendicular or oblique to the axis of the sheath 910. Preferably, the axis of rotation of the drive disk 50 is disposed perpendicular to the axis of the sheath 910.

In one embodiment, as shown in fig. 1, a puncture needle 600 is further disposed inside the sheath 910, the puncture needle 600 can slide inside the sheath 910, and the distal end of the puncture needle 600 can bend along with the bending of the sheath 910. The puncture needle 600 has a back-set puncture end (an end close to the patient) and a connection end (an end close to the operator), the connection end of the puncture needle 600 is arranged in the handle 920, the puncture end of the puncture needle 600 extends out of the sheath 910 for puncture, and the puncture section of the puncture needle 600 punctures to a predetermined target point and performs injection or suction, thereby providing a foundation for subsequent treatment.

In one embodiment, as shown in fig. 1, the interventional device 1000 further includes an absorption head 900 located at the distal end of the sheath 910, the interventional device 1000 sends the absorption head 900 and the sheath 910 into the human body and moves to the vicinity of the tissue organ, and the movement of the absorption head 900 and the operation of the internal devices of the absorption head 900 (such as the puncture needle 600 and the endoscope) are controlled by the handle 920 to complete a series of treatment operations including target point finding, absorption, puncture injection, and the like. The interventional instrument 1000 may also be provided with auxiliary equipment (e.g., suction devices and cleaning devices) on the exterior thereof, which auxiliary equipment (not shown) is connected to the interior of the suction head 900 through a pipe or channel and assists the operation of the internal devices.

As shown in fig. 1, the sheath 910 is substantially cylindrical. Of course, in other embodiments, the sheath 910 may have other shapes, such as an elliptical shape. The sheath 910 may be formed by combining a plurality of sections to obtain corresponding rigidity at different positions, and each section may have a single-layer structure or a multi-layer composite structure.

In one embodiment, the sheath 910 comprises, in order from the distal end to the proximal end, a first unit segment 9101, a second unit segment 9102, and a third unit segment 9103. The first unit section 9101 is connected with the adsorption head 900, the hardness of the material of the first unit section 9101 is the softest in the three sections of the sheath tubes 910, for example, Pebax 3533 is adopted, the sheath tubes 910 are bent through the first unit section 9101, meanwhile, the bending radius of the first unit section 9101 is adjustable, even if the puncture path of the sheath tubes 910 is adjustable, so that the operation shape of the sheath tubes 910 is stronger, the capability of the sheath tubes 910 for bypassing blood vessels, bones and nerve tissues is stronger, the risk of puncturing organs is reduced, and the sheath tubes can puncture the target points more accurately.

A plurality of pipelines are arranged in the sheath 910 in a penetrating manner, one end of the pipeline extends into the adsorption head 900, the other end of the pipeline passes through the handle 920 and continues to extend out of the handle 920 to be connected with corresponding devices (such as a suction device, a cleaning device, a puncture needle 600 and the like). Of course, the sheath 910 may be provided with a plurality of channels to replace the connecting function of the pipeline.

In one embodiment, as shown in fig. 31 and 32, the first and

second traction wires

931 and 932 are disposed diametrically opposite each other along the sheath 910, and the third traction wire 933 is disposed circumferentially between the first and

second traction wires

931 and 932 about the sheath 910.

The first traction wire 931 and the second traction wire 932 have a mutual linkage relationship, and the linkage relationship is that when the first traction wire 931 slides towards the proximal end, the second traction wire 932 slides towards the distal end, so that the first traction wire 931 and the second traction wire 932 are prevented from being stretched reversely during bending adjustment, and not only is bending adjustment resistance increased, but also potential safety hazards exist;

as shown in fig. 23 and 24, the bending direction of the third pull wire 933 is perpendicular to the bending directions of the first pull wire 931 and the second pull wire 932, so that the bending range of the distal end of the sheath 910 is wider. Meanwhile, the sheath 910 can be bent between the third traction wire 933 and the first traction wire 931 or the second traction wire 932, so that the operator can adjust the bending direction of the sheath 910 more flexibly.

In one embodiment, the distal end of the sheath 910 is provided with the suction head 900, the suction head 900 has a suction port 310 on one side in the radial direction of the suction head, which is the extending direction from the distal end to the proximal end as the axial direction of the suction head, so as to increase the area of the suction port 310 as much as possible, so as to increase the suction surface and the operation surface of the suction head 900, thereby facilitating the bending puncture of the puncture needle 600;

the orientation of the suction port 310 coincides with the circumferential position of the third pull wire 933 with respect to the sheath 910.

The adsorption head 900 depends on the third traction wire 933 to complete the bending movement towards one side of the adsorption port 310, so that the adsorption head 900 can be conveniently adsorbed on the tissue and organ.

In one embodiment, as shown in fig. 31, 32 and 33, the pull wire 930 is connected to the distal end of the sheath 910 by: a fixing ring 940 is arranged in the sheath 910 and near the distal end of the sheath, the fixing ring 940 forms a positioning groove 9401 through self deformation and/or local cutting, and the distal end of the traction wire 930 is placed in and fixed in the positioning groove 9401. Compared with a welding mode, the fixing mode of the traction wire 930 and the sheath tube 910 through the fixing ring 940 is firmer in fixing of the traction wire 930, and meanwhile, welding spots can be prevented from being generated on the inner wall of the sheath tube 910.

The fixing ring 940 is circular, the outer circumferential surface of the fixing ring is matched with the inner wall of the sheath tube 910, the sheath tube 910 is shrunk and clamped on the fixing ring 940 through a heat shrinkage process, and the inner wall of the sheath tube 910 is melted and bonded on the fixing ring 940, so that the assembly is convenient.

The positioning groove 9401 is a through groove along the axial direction of the fixing ring 940, and the positioning groove 9401 and the traction wire 930 are connected and fixed with each other through spot welding. The positioning groove 9401 may be obtained by machining or may be integrally stamped with the fixing ring 940.

Of course, in other embodiments, the attachment of the pull wire 930 to the distal end of the sheath 910 (the first unit segment 9101) employs: the pull wire 930 is welded to the inner wall of the sheath 910, and the welding manner can reduce the difficulty in assembling the pull wire 930 and the sheath 910.

In one embodiment, the fixing ring 940 has a plurality of radially outwardly protruding or inwardly recessed deformation portions distributed at intervals along the circumferential direction, and the deformation portions form positioning grooves 9401 at the outer side of the fixing ring 940.

The deformation part is formed by the self deformation of the fixing ring 940 protruding or recessing and is attached to part of the outer edge surface of the traction wire 930, so that the traction wire 930 can be installed and positioned conveniently.

In one embodiment, as shown in fig. 1, 29 and 30, the first bending adjustment chamber 182 is located near the distal end of the handle 920 relative to the second bending adjustment chamber 13;

the driving disc 50 is provided with two wire slots 52 which are communicated or isolated from each other, the first traction wire 931 and the second traction wire 932 are respectively wound on the driving disc 50 through the corresponding wire slots 52, the traction wire 930 is disposed in the wire slot 52, and the traction wire 930 can be prevented from being separated from the driving disc 50 when the driving disc 50 rotates.

The third drawing wire 933 passes through the first bending adjusting chamber 182 on the side of the driving disc 50 opposite to the two wire slots 52 and extends to the second bending adjusting chamber 13, the second bending adjusting chamber 13 is communicated with the first bending adjusting chamber 182 through a communication hole (not shown), and after passing through the first bending adjusting chamber 182, the third drawing wire 933 extends to the second bending adjusting chamber 13 through the communication hole and is connected with a linkage piece positioned in the second bending adjusting chamber 13. For example, one end of the communication hole communicates with the through hole 112 and the other end communicates with the guide groove 111. Alternatively, in other embodiments, the mounting gap between the mounting ring 16 and the stop shoulder 115 forms a communication aperture.

In the process of rotating the driving disc 50, the groove wall of the wire groove 52 is prevented from tearing the third pull wire 933, which affects the bending of the distal end of the sheath 910.

In one embodiment, as shown in fig. 34 and 35, the wire slots 52 are distributed around the outer periphery of the driving disk 50 or are formed on the disk surface of the driving disk 50.

In the present embodiment, each of the wire grooves 52 is opened on the disk surface of the drive disk 50. The disc surface of the drive disc 50 may be understood as one of the end surfaces of both axial ends of the drive disc 50. When the wire groove 52 is opened on the disk surface of the drive disk 50, the extending path of the wire groove 52 may be a straight line or a curved line (e.g., an arc). The wire slot 52 has a head end and a tail end along the extension path, and the proximal end of the pull wire 930 is threaded through the head end of the wire slot 52 and extends to the tail end of the wire slot 52.

In one embodiment, as shown in fig. 34 and 35, the wire groove 52 includes an arc-shaped segment 521 and a turning segment 522, the arc-shaped segment 521 extends around the center of the driving disc 50, and the turning segment 522 is abutted with the arc-shaped segment 521 and extends toward the middle of the driving disc 50.

The pull wire 930 is extended to the turning section 522 and fixed after entering through the arc section 521. During the rotation of the driving disk 50, the arc segment 521 changes position with the driving disk 50 to drive the traction wire 930 to move. The arc 521 makes the operation of the pulling wire 930 more stable, and there is no sudden change in the speed of the pulling wire 930, which may cause the precision of the bending of the distal end of the sheath 910 to decrease.

The extending directions of the turning sections 522 of the two wire grooves 52 are parallel or oblique, and the two turning sections 522 are close to each other. Meanwhile, since the turning section 522 extends to the middle of the driving disc 50, the space of the wire slot 52 occupying the disc surface of the driving disc 50 in the length direction is shortened, so that the structure of the driving disc 50 is more compact.

In one embodiment, as shown in fig. 34 and 35, the radial position of the arc 521 is located in the middle of the driving disc 50 or adjacent to the edge of the driving disc 50, the arc 521 of the two-wire groove 52 is located at two opposite sides of the driving disc 50 in the radial direction, and the first traction wire 931 and the second traction wire 932 have a linkage relationship with each other, in which when the first traction wire 931 moves towards the proximal end, the second traction wire 932 moves towards the distal end, so as to avoid the first traction wire 931 and the second traction wire 932 from being stretched reversely during bending adjustment, which not only increases bending resistance, but also has a safety hazard.

In one embodiment, as shown in fig. 34 and 35, the central angle of the arc 521 is 60 to 120 degrees;

the arc-shaped section 521 is provided with a wire inlet 523, and the wire inlet 523 faces to the far end side in the non-bending state.

Two segmental arcs 521 communicate each other at the one end of going into line mouth 523 dorsad, and the central angle that segmental arcs 521 correspond is under this scope, and driving-disc 50 is in initial condition (sheath 910 is in under the non-accent curved state), has certain interval between the income line mouth 523 of two wire casings 52, and this interval can avoid driving-disc 50 pivoted certain angle after, first pull wire 931 and second pull wire 932 concerted motion can cause first pull wire 931 and second pull wire 932 to take place reverse stretch when transferring the curve.

Preferably, the central angle corresponding to the arc-shaped section 521 is 80-100 degrees.

Most preferably, arcuate segment 521 subtends an angle of 90 degrees at its center.

In one embodiment, referring to fig. 36, the end of the turn 522 is a positioning region 53, and the proximal end of the pull wire 930 is secured to the positioning region 53 by a mounting member 54. referring to fig. 36, the pull wire 930 is connected to the driving disk 50.

The pull wire 930 is first coupled to the mounting member 54 (e.g., the pull wire 930 is fastened to the mounting member 54 by bolting), and then the mounting member 54 is engaged with the positioning region 53 to quickly fix the pull wire 930 to the driving plate 50, so that the difficulty in mounting the pull wire 930 to the driving plate 50 can be reduced.

Wherein, location district 53 is the groove structure, and location district 53 is linked together with the terminal of wire casing 52, and the installed part 54 block is located this location district 53. The locating region 53 may be machined with the wire chase 52 to reduce the machining process of the drive disc 50.

Wherein the mounting member 54 is generally block-shaped. The outer profile of the positioning region 53 is substantially coincident with the outer profile of the mounting member 54 (preferably an interference fit between the mounting member 54 and the positioning region 53) to prevent the mounting member 54 from disengaging from the positioning region 53 when the mounting member 54 is subjected to the force of the pull wire 930.

Of course, in other embodiments, the traction wire 930 may be fixed to the driving disk 50 by welding, gluing, etc., and will not be further described herein.

Preferably, the positioning area 53 is located on the disc surface of the drive disc 50.

In one embodiment, as shown in fig. 29, the handle 920 can provide support for the various components while also providing room for the operator to grasp. In order to facilitate forming the first bending adjustment chamber 182 on the handle 920, referring to an embodiment, as shown in fig. 29, the handle 920 has a first housing 18 and a second housing 181, the first housing 18 and the second housing 181 are buckled with each other to enclose the first bending adjustment chamber 182, and the sheath 910 is fixed between the first housing 18 and the second housing 181.

In order to reduce the difficulty in assembling the first casing 18 and the second casing 181, the first casing 18 and the second casing 181 may be fixed by screws or by clamping.

To facilitate the operation of the driving disc 50, referring to an embodiment, as shown in fig. 28 and 29, the handle 920 is provided with an operation slot 183 communicated with the first bending chamber 182; the driving disk 50 has a driving handle 51 at its periphery, and the driving handle 51 extends from the operating slot 183 to the first bending chamber 182. The operator holds the portion of the driving handle 51 located outside the first bending adjusting chamber 182, and then drives the driving disk 50 to rotate through the driving handle 51, so that the operator can control the driving disk 50 to rotate.

The driving lever 51 is substantially in the shape of a rod, and the driving lever 51 and the driving disk 50 are provided separately or integrally. In the present embodiment, the number of the driving levers 51 is two, the number of the operation slots 183 is two, and the two driving levers 51 are located at opposite sides of the driving disc 50 and respectively pass through the corresponding operation slots 183. Of course, in other embodiments, the number of the driving levers 51 may be 1, 3, or 3 or more.

The operating slot 183 extends proximally along the distal end of the handle 920 so that the drive shaft 51 can move within the operating slot 183 when the drive shaft 51 rotates the drive disc 50. In order to reduce the processing difficulty of the operation slot 183, the operation slot 183 is located at the connection between the first housing 18 and the second housing 181.

In one embodiment, as shown in fig. 30 and 37 to 40, the handle 920 includes a supporting body 11 and a rotating handle 12 rotatably mounted on the outer periphery of the supporting body 11, a second bending adjustment chamber 13 is defined between the supporting body 11 and the rotating handle 12, a link 14 is slidably engaged with the supporting body 11, the outer periphery of the link 14 has an external thread, and the inner wall of the rotating handle 12 has an internal thread engaged with the external thread.

The screw connection between the rotating handle 12 and the link 14 can convert the rotation of the rotating handle 12 into the sliding of the link 14 on the supporting body 11, so as to stabilize the movement of the link 14. Meanwhile, the self-locking phenomenon of the linkage part 14 can be realized, and the phenomenon that the resetting force of the sheath tube 910 drives the linkage part 14 to move is avoided.

In this application, the operator is through rotating rotatory handle 12, and rotatory handle 12 drives linkage 14 and slides on supporter 11 to it is crooked to drive the distal end that traction wire 930 pull sheath 910, and it is crooked towards fixed direction to drive adsorption head 900 at last, so that adsorption head 900 avoids the tissue organ, reduces the damage to the tissue organ.

In one embodiment, the supporting body 11 defines a guiding groove 111 extending along the axial direction of the sheath 910, the link 14 is slidably mounted in the guiding groove 111, and the guiding groove 111 can define a moving path of the link 14, so as to move the link 14 in a fixed direction.

At least part of the link 14 is located in the guide groove 111 and can slide along the guide groove 111, and the part of the link 14 extending out of the guide groove 111 is provided with an external thread (the external thread is matched with the internal thread of the rotary handle 12). In order to stabilize the sliding of the link 14, the link 14 is attached to the side walls of the guide groove 111 along both sides of the sheath 910 in the axial direction, so that the link 14 is prevented from shaking in the guide groove 111 along the radial direction of the sheath 910, and the bending accuracy of the sheath 910 is reduced.

The support 11 may be made of metal or medical plastic material, the support 11 is a cylinder and has an axis which is consistent with the axis of the sheath 910, the support 11 is provided with a through hole 112 penetrating along its own axis, and the through hole 112 is used for each tube (such as the puncture needle 600, etc.) to pass through. The outer side wall of the supporting body 11 has two oppositely disposed guiding plates 113, the guiding groove 111 is formed between the two guiding plates 113, and the two guiding plates 113 are disposed in parallel or at an included angle.

In one embodiment, the orientation of the suction port 310 is consistent with the circumferential position of the guide groove 111 relative to the support body 11, and when the traction wire 930 is inserted into the sheath 910, the traction wire 930 is always attached to the inner wall of the sheath 910, so that the traction wire 930 is retracted from each tube in the sheath 910.

In terms of the connection manner of the traction wire 930 and the linkage member 14, referring to an embodiment, the linkage member 14 is provided with a threading hole 142 axially penetrating along the sheath 910, and the traction wire 930 is adhered in the threading hole 142. The distal end of the pull wire 930 is disposed in or passes through the threading hole 142, and the portion of the pull wire 930 located in the threading hole 142 is adhered to the inner wall of the threading hole 142 by gluing, so as to simplify the structure between the pull wire 930 and the linkage member 14 and reduce the difficulty in assembling the pull wire 930 and the linkage member 14.

The threading hole 142 is located at a portion of the link 14 disposed in the guide groove 111, and the cross-sectional shape of the threading hole 142 is not strictly limited in the present embodiment, and may be, for example, circular or oval.

Of course, in other embodiments, the connection of both the pull wire 930 and the linkage 14 is by: the proximal end of the traction wire 930 is passed through the threading hole 142 and tied, the knot is limited by the threading hole 142, when the traction wire 930 is acted by the sheath 910, the knot on the traction wire 930 can not pass through the threading hole 142, and the traction wire 930 can be fixed on the linkage member 14 through the structure of the traction wire 930 itself, so that the difficulty of assembling the traction wire 930 and the linkage member 14 is further reduced.

Alternatively, the pull wire 930 may be threaded proximally through the threading bore 142 and coupled to a retaining member (not shown) that is constrained to the threading bore 142. The shape of the anti-drop part is not strictly limited, as long as the traction wire 930 is pulled by the acting force of the sheath 910, the anti-drop part cannot pass through the threading hole 142, the traction wire 930 is bolted to the anti-drop part after passing through the threading hole 142, and the anti-drop part can increase the connection strength between the traction wire 930 and the linkage part 14.

In order to limit the relative movement between the anti-slip part and the linkage part 14, in one embodiment, a groove (not shown) is provided at the proximal end (the end close to the operator) of the linkage part 14, the groove is located at the threading hole 142, and the shape of the anti-slip part is substantially consistent with the shape of the groove, so that the anti-slip part is embedded in the groove. To facilitate attachment of the pull wire 930 to the release prevention member, the pull wire 930 is bolted to the release prevention member.

In the connection manner of the rotating handle 12 and the handle 920, referring to an embodiment, the rotating handle 12 is cylindrical, the handle 920 is provided with two rotating grooves 161 located at two ends of the rotating handle 12, two axial ends of the rotating handle 12 respectively extend into the corresponding rotating grooves 161 and are rotatably mounted on the handle 920, so as to avoid additional arrangement of a support frame and other components for supporting the rotating handle 12 on the handle 920, and simplify the structure of the handle 920.

The axis of the rotating handle 12 coincides with the axis of the sheath 910. The outer side wall of the rotating handle 12 is higher than, lower than or flush with the outer side wall of the handle 920, so that the operator can operate the rotating handle 12 conveniently, in the embodiment, the outer side wall of the rotating handle 12 is higher than the outer side wall of the handle 920.

In the connection manner of the rotating handle 12 and the handle 920, referring to an embodiment, the handle 920 has two mounting rings 16 located at two ends of the rotating handle 12, and the support 11 is mounted in the handle 920 and forms two rotating grooves 161 with the respective mounting rings 16, thereby further simplifying the assembly structure between the rotating handle 12 and the handle 920.

When the supporting body 11 is located in the rotating handle 12, two ends of the supporting body 11 respectively extend out of the rotating handle 12, so that part of the structure of the supporting body 11 can extend to the mounting ring 16, two ends of the supporting body 11 are provided with supporting shoulders 114 opposite to the mounting ring 16, and the supporting shoulders 114 and the mounting ring 16 form a rotating groove 161.

In the installation manner of the support body 11 and the handle 920, referring to an embodiment, the outer side wall of the support body 11 is provided with a limiting shoulder 115, the inner side wall of the handle 920 is provided with a limiting groove (not shown) matched with the limiting shoulder 115, and the limiting shoulder 115 not only positions the installation position of the support body 11 in the handle 920, but also pre-installs the support body 11 in the handle 920.

The mounting ring 16 and the handle 920 are integrally or separately arranged. In order to facilitate the assembly of the mounting ring 16 and the handle 920, in the present embodiment, the mounting ring 16 and the handle 920 are provided separately.

In order to facilitate the operation of the handle 920 for the operator, referring to an embodiment in which the rotation axis of the driving disk 50 is perpendicular or oblique to the axis of the rotation handle 12, when the operator adjusts the driving disk 50 and the rotation handle 12, one hand of the operator holds the handle 920 and operates the rotation handle 12, and the other hand can separately operate the driving disk 50 to facilitate the operation of the driving disk 50 and the rotation handle 12.

As shown in fig. 41-44, in some of these embodiments the locking mechanism 105 comprises a first locking mechanism 60, the first locking mechanism 60 comprising:

and the knob 61 is in threaded fit with the handle 920, at least one part of the knob 61 is exposed outside the handle 920, the knob 61 is far away from or pressed against the driving disk 50 during the rotation of the knob 61, and the driving disk 50 is locked in a pressed state.

When the distal end of the sheath 910 is bent to a predetermined position, the knob 61 is abutted to lock the driving disk 50, so as to prevent the driving disk 50 from being touched by external force by mistake, which causes the rotation of the driving disk 50 and affects the bending angle of the distal end of the sheath 910.

In one embodiment, the first locking mechanism 60 further includes an elastic pad 62 pressed between the knob 61 and the driving disc 50, and during the rotation of the knob 61, by pressing the elastic pad 62 to make the driving disc 50 in a pressed state, the elastic pad 62 can prevent the knob 61 from directly pressing the driving disc 50, and at the same time, the friction between the knob 61 and the driving disc 50 is increased to make the locking of the knob 61 more firm.

The elastic pad 62 may be made of rubber or silicone, and when the knob 61 presses against the elastic pad 62, the elastic pad 62 is deformed by a force. The elastic pad 62 is substantially circular in shape and is capable of covering the disk surface of the drive disk 50 (one end in the axial direction of the drive disk 50). Of course, in other embodiments, the shape of the elastic pad 62 may also be oval, rectangular, annular, etc., and the shape of the elastic pad 62 is not strictly limited as long as the elastic pad 62 can increase the friction force between the knob 61 and the driving disk 50.

In one embodiment, the rotation stop portion 621 is disposed on the periphery of the elastic pad 62, the handle 920 is disposed with a rotation stop groove 184 engaged with the rotation stop portion 621, and the rotation stop groove 184 and the rotation stop portion 621 are engaged with each other to prevent the rotation force of the knob 61 acting on the elastic pad 62, so as to prevent the elastic pad 62 from rotating with the knob 61.

The rotation stopping groove 184 is opened on the inner wall of the second housing 181. In order to facilitate observing the state of the elastic pad 62 (whether the elastic pad is pressed by the knob 61), referring to an embodiment, the handle 920 is provided with an observation window 185 communicating with the rotation stop groove 184, and the position of the elastic pad 62 is observed through the observation window 185 to deduce the state of the elastic pad 62.

In the embodiment, the number of the rotation stopping portions 621 is two, the number of the rotation stopping slots 184 is two, and the two rotation stopping portions 621 are oppositely disposed on two opposite sides of the elastic pad 62 and respectively matched with the corresponding rotation stopping slots 184. Of course, in other embodiments, the number of the rotation stoppers 621 may be 1, 3, or 3 or more.

In order to further prevent the elastic pad 62 from rotating with the knob 61, in an embodiment, a plurality of deformation grooves 57 are formed on a surface of the driving disc 50 contacting with the elastic pad 62, after the elastic pad 62 is pressed by the knob 61, the elastic pad 62 deforms, and a portion of the deformation of the elastic pad 62 enters the deformation grooves 57 to increase the friction force between the elastic pad 62 and the knob 61.

When the knob 61 is in the initial state (i.e., when the sheath 910 is not bent), the extending direction of each deformation groove 57 is substantially aligned with the extending direction of the sheath 910, and the extending directions of the deformation grooves 57 are arranged in parallel.

In one embodiment, the first locking mechanism 60 further includes a spacer 63, the spacer 63 is disposed between the elastic pad 62 and the knob 61, the knob 61 presses the elastic pad 62 by driving the spacer 63, and the spacer 63 can transmit the pressing force of the knob 61 to the elastic pad 62. During the rotation of the knob 61, the spacer 63 consumes a part of the rotation force (for example, by means of the gravity of the spacer 63 itself, the friction force between the spacer 63 and the handle 920, etc.), and at this time, only a small part of the rotation force of the knob 61 is transmitted to the elastic pad 62, so as to further reduce the rotation force of the knob 61 on the elastic pad 62.

The spacer 63 is substantially cylindrical, and the spacer 63 has two axial ends, one of which abuts against the knob 61 and the other of which abuts against the elastic pad 62. In order to increase the contact surface between the spacer 63 and the elastic pad 62, the end of the spacer 63 facing the elastic pad 62 has an end plate 631, the end surface of the end plate 631 facing away from the spacer 63 contacts the elastic pad 62, and the contour of the end surface of the end plate 631 facing the elastic pad 62 substantially matches the outer contour of the elastic pad 62. Wherein the area of the end surface of the spacer 63 contacting the knob 61 is smaller than the area of the end surface of the end plate 631, the rotating force of the knob 61 acting on the spacer 63 can be reduced, so as to further reduce the rotating force of the elastic pad 62 received by the knob 61.

In the matching manner of the knob 61 and the handle 920, referring to an embodiment, a driving groove 641 communicated with the first bending chamber 182 is formed in a side wall of the handle 920, an internal thread is formed in an inner wall of the driving groove 641, the knob 61 is provided with an external thread matched with the internal thread, the driving disc 50 is assembled in the first bending chamber 182 and can be fixed with the first shell 18 or the second shell 181, then the elastic pad 62 and the isolating piece 63 are installed on the handle 920 in sequence through the driving groove 641, and finally the knob 61 is screwed into the driving groove 641. The next step is assembled after the previous component is fixed, so that the problem that the components are required to be matched with each other to assemble when the elastic pad 62, the spacer 63 and the knob 61 are assembled together with the driving disc 50 is solved, and the assembly difficulty of the elastic pad 62, the spacer 63 and the knob 61 is reduced.

In order to satisfy a certain amount of movement of the knob 61, the driving groove 641 needs to have a certain extension length, and at this time, there is a certain requirement for the thickness of the chamber wall of the first bending adjustment chamber 182, so as to increase the size increase of the handle 920 and the waste of the material of the handle 920, in order to solve this problem, referring to an embodiment, the handle 920 is provided with a connecting sleeve 64, the driving groove 641 communicated with the first bending adjustment chamber 182 is arranged in the connecting sleeve 64, the inner wall of the driving groove 641 is provided with an internal thread, the knob 61 is provided with an external thread matched with the internal thread, the connecting sleeve 64 is wholly arranged in the handle 920 or at least partially arranged outside the handle 920, and the connecting sleeve 64 can satisfy the requirement for the extension length of the driving groove 641, so as to avoid the increase of the thickness size of the handle.

The viewing window 185 is located at the junction of the connection sleeve 64 and the handle 920. The axis of the connecting sleeve 64 is substantially coincident with or parallel to the axis of the drive disc 50. The connecting sleeve 64 and the handle 920 are fixed in a split manner or are of an integral structure, and in order to enhance the connecting strength of the connecting sleeve 64 and the handle 920, the connecting sleeve 64 and the handle 920 are integrally arranged.

In one embodiment, the knob 61 includes an acting portion 612 and a cover 611, an external thread is disposed on an outer side portion of the acting portion 612, the acting portion 612 is in threaded connection with the driving groove 641, one end of the acting portion 612 can press against the driving disc 50, and the other end of the acting portion is exposed outside the handle 920; the cover 611 is connected to the acting portion 612 and exposed outside the handle 920, and is used for shielding the connection between the acting portion 612 and the driving groove 641.

The knob 61 can be screwed into and out of the driving groove 641, and dust can be prevented from entering the driving groove 641.

The action portion 612 is substantially rod-shaped, the cover 611 extends from the end of the action portion 612 in the radial direction and extends toward the handle 920, and the cover 611 and the handle 920 are in clearance fit, and the clearance allowance is adapted to the movement stroke of the action portion 612 in the driving groove 641.

In order to facilitate the operator to operate the knob 61, the outer sidewall of the knob 61 is provided with a plurality of protruding strips 613, and the protruding strips 613 can increase the friction between the operator's hand and the knob 61.

As shown in fig. 45-47, as an alternative to the locking mechanism 105. In other embodiments, the locking mechanism 105 further comprises a second locking mechanism 70, the second locking mechanism 70 comprising:

a plurality of locking grooves 55 provided in the drive disc 50 along the circumferential direction of the drive disc 50;

the positioning piece 71 is movably arranged in the first bending adjusting chamber 182, and the positioning piece 71 is clamped with the corresponding locking groove 55 in position in the rotating process of the driving disc 50;

and an elastic driving member 72 which abuts against the positioning member 71 to drive the positioning member 71 to be kept engaged with the corresponding locking groove 55.

When the distal end of the sheath 910 is bent to a predetermined position, the positioning element 71 is engaged with the corresponding locking slot 55 under the action of the elastic driving element 72 to lock the driving disc 50, so as to prevent the driving disc 50 from rotating due to the accidental touch of external force on the driving disc 50, which may affect the distal end bending angle of the sheath 910.

In one embodiment, the locking grooves 55 are distributed at intervals around the axis of the driving disc 50, and the central angle of the adjacent locking grooves 55 relative to the center of the driving disc 50 is 5 to 20 degrees, so that the positioning element 71 sequentially passes through the locking grooves 55 distributed at intervals around the axis of the driving disc 50 during the rotation of the driving disc 50, and the smaller the distance between the adjacent locking grooves 55 is, the higher the bending precision of the distal end of the sheath 910 is.

Preferably, the central angle of the adjacent locking slots 55 with respect to the center of the driving disc 50 is 8 to 20 degrees.

Most preferably, the adjacent locking slots 55 are angled 15 degrees relative to the center of the drive plate 50.

The angle of the central angle of the adjacent locking grooves 55 with respect to the center of the driving disc 50 may be determined according to the distance from the locking groove 55 to the center of the driving disc 50. The diameter of the drive plate 50 limits the distance of the locking slot 55 to the center of the drive plate 50.

In the present embodiment, the diameter of the drive disc 50 is 20mm to 60 mm. Preferably, the diameter of the drive disc 50 is between 30mm and 50 mm. Most preferably, the diameter of the drive disc 50 is 40 mm.

Of course, in other embodiments, the diameter of the driving disc 50 and the central angle of the adjacent locking slots 55 relative to the center of the driving disc 50 can be adjusted according to actual needs, and will not be further described herein.

In one embodiment, at least one of the contact portions of the positioning element 71 and the locking slot 55 is an arc surface structure, so that the positioning element 71 can be separated from the locking slot 55 when the driver rotates the driving disc 50, thereby preventing the positioning element 71 and the locking slot 55 from being locked to each other.

In one embodiment, the matching portion of the positioning element 71 and the locking groove 55 is in a spherical crown shape, wherein the outer surface of the spherical crown is in a cambered surface structure, so that the positioning element 71 and the locking groove 55 can be separated from each other.

To facilitate the machining of the positioning member 71, it is preferable that the positioning member 71 has a spherical shape.

In one embodiment, the positioning members 71 are distributed in pairs, and the two positioning members 71 of the same pair are located on two opposite sides of the driving disc 50 in the radial direction, so that the forces exerted by the positioning members 71 on the driving disc 50 are balanced.

In the present embodiment, three pairs of the positioning members 71 are provided, and the positioning members 71 are spaced apart from each other around the axis of the drive plate 50, and each positioning member 71 engages with the corresponding locking groove 55 during the locking of the drive plate 50. Of course, in other embodiments, the positioning members 71 are one pair, two pairs, or three or more pairs.

In terms of the assembly relationship between the elastic driving member 72 and the handle 920, referring to an embodiment, the inner wall of the first bending adjustment chamber 182 is provided with a mounting post 73, and the elastic driving member 72 and the mounting post 73 are matched in the following manner: the periphery of the mounting post 73 is sleeved with the elastic driving member 72, the mounting post 73 can limit the movement path of the elastic driving member 72, and can support the elastic driving member 72, so that the elastic driving member 72 is prevented from being twisted when the positioning member 71 receives the rotating force of the driving disk 50.

Of course, in other embodiments, the mounting post 73 is hollow and one end of the resilient actuator 72 extends into the mounting post 73.

In order to prevent the positioning member 71 from being separated from the cavity, which may cause the positioning member 71 to be caught between the mounting post 73 and the driving disk 50, referring to an embodiment, the positioning member 71 is movably mounted in the cavity, and at least a portion of the positioning member 71 is exposed outside the cavity, and an inner edge of the cavity is provided with an anti-falling step 731 engaged with the positioning member 71.

In the present embodiment, the elastic drive member 72 is a compression spring.

Taking the example of injecting hydrogel into ventricular wall puncture (for example, treating heart failure), the working principle of the application is as follows:

the suction head 900 extends into the human body, is close to the tissue and organ, and the first and second traction wires are pulled by rotating the handle 12 to adjust the two sides of the suction head to be bent for searching a target point. After the approximate area is determined, the third traction wire 933 is pulled, the adsorption head 900 swings downwards, the adsorption port 310 is aligned to the surface, a target point is observed and searched by relying on the endoscope 710, after the target point position is confirmed, the sealing lip 311 is attached to the surface, the handle 920 starts a suction device, gas and liquid in the working cavity 300 are sucked, pressure difference is formed between the air pressure in the working cavity 300 and the external air pressure, the sealing lip 311 is tightly adsorbed on the surface due to the pressure difference, the adsorption head 900 moves along with the movement of an adsorbate, the adsorption head 900 and the adsorbate are relatively static, and then puncture injection operation is performed through the handle 920.

The handle 920 pushes the inner needle tube 630 toward the suction head 900 to bend and deform the needle 620 of the head along the guide tube 610 until the guide tube 610 is extended, and the endoscope 710 observes whether the puncture site is reasonable. If it is reasonable, the inner needle tube 630 is pushed continuously in the same direction to puncture the needle 620 into the organ, and then the injection is performed. When the injection is completed or the puncture point is not reasonable, the inner needle tube 630 is pulled reversely to retract into the guide tube 610, the suction device is closed, the adsorption head 900 is separated, and the next target point is moved to perform the next puncture injection.

In the whole process, when the condition of the whole operation process is observed through the endoscope 710, if the lens is contaminated by foreign matters or blood, the endoscope 710 and the working cavity 300 are cleaned by conveying cleaning liquid through the cleaning channel 800, and the mixed liquid is sucked and taken away by the suction device, so that the cleanness of the working cavity 300 and the clear visual field of the endoscope 710 are kept.

The utility model provides a cavity homoenergetic of adsorption head produces the adsorption affinity and avoids making the adsorption head break away from by the adsorbate because of the top of puncture action is moved, and inside is provided with the passageway that supplies puncture equipment and observation equipment, has improved operation precision.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims

1. The adsorption head of the interventional instrument is characterized in that the adsorption head is provided with a far end and a near end which are opposite, a working cavity is arranged on the far end side, the adsorption head is provided with an adsorption port which is communicated with the working cavity and used for acting with an adsorbed object, and the near end side of the adsorption head is provided with an adsorption channel and an operation channel which are communicated with the working cavity; the opening part of the adsorption port is a communication area or is divided into a plurality of unit areas.

2. The suction head of the interventional instrument as defined in claim 1, wherein the working lumen is arranged in a manner that:

a body cavity, or

3. The absorption head of the interventional instrument as claimed in claim 2, wherein a partition is provided between two sub-cavities adjacent to each other and is communicated with each other through a through hole provided on the partition, or the two sub-cavities adjacent to each other are communicated with each other through a pipeline.

4. The suction head of the interventional instrument as claimed in claim 1, wherein the edges of the suction port are in the same plane or in a curved surface with a middle portion recessed toward the inside of the suction port.

5. The absorption head of the interventional instrument as claimed in claim 1, wherein a sealing lip for abutting against an absorbed object is convexly arranged on the periphery of the absorption port, and the sealing lip is annular and provided with a flanging.

6. The suction head of the interventional instrument as defined in claim 1, wherein the plurality of unit regions are formed in a regularly distributed lattice structure.

7. The suction head of the interventional instrument as defined in claim 1, wherein the plurality of unit regions are configured in a random porous structure.

8. The suction head of the interventional instrument as defined in claim 2, wherein the communication portion of the operation channel and the working chamber is a first communication port located at a side of the working chamber away from the suction port.

9. The suction head of the interventional instrument as defined in claim 8, wherein the distal end side of the inner wall of the working chamber is a guide portion gradually curved and transited from the first communication port to the distal end side of the suction port.

10. The suction head of the interventional instrument as set forth in claim 9, wherein the suction port is opened at a side in a radial direction of the suction head in which an extending direction from the distal end to the proximal end is an axial direction of the suction head.

11. The suction head of the interventional instrument as claimed in claim 10, wherein the guide part is curved and transited at a rotation angle of 75-100 degrees with respect to the axial direction of the suction head.

12. The suction head of the interventional instrument as defined in claim 9, wherein the working chamber is a body cavity, the suction passage communicates with the working chamber through a second communication port, and the first communication port and the second communication port are located on a proximal side of an inner wall of the working chamber.

13. The suction head of the interventional instrument as defined in claim 2, wherein an endoscope channel and a cleaning channel respectively communicating with the working chamber are further provided at a proximal side of the suction head.

14. The suction head of the interventional instrument as defined in claim 13, wherein the suction channel, the operation channel, the endoscope channel and the cleaning channel are independent or at least two of the suction channel, the operation channel, the endoscope channel and the cleaning channel are connected together, and the suction channel, the operation channel, the endoscope channel and the cleaning channel are formed in a manner that:

15. An interventional instrument, comprising:

an adsorption head as claimed in any one of claims 1 to 14;

a sheath connected to the adsorption head;

16. The interventional instrument of claim 15, further comprising an outer needle cannula within the sheath, a distal end of the outer needle cannula being fixedly docked with or extendedly secured within the operative channel, a proximal end of the outer needle cannula extending and secured to the handle;

17. The interventional device of claim 16, wherein a penetrating sleeve is fixed in the handle, the proximal end of the outer needle cannula extends into fixed sealing engagement with the penetrating sleeve and with an inner wall of the penetrating sleeve, the proximal end of the inner needle cannula extends sequentially beyond the outer needle cannula and the penetrating sleeve and is connected to the driving member, and the inner needle cannula is in sliding sealing engagement with the inner wall of the penetrating sleeve.