CN220344551U

CN220344551U - Interventional instrument conveying system with protective tube

Info

Publication number: CN220344551U
Application number: CN202022457190.3U
Authority: CN
Inventors: 雷荣军; 王媛茹
Original assignee: Hangzhou Qiming Medical Devices Co ltd
Current assignee: Hangzhou Qiming Medical Devices Co ltd
Priority date: 2019-10-31
Filing date: 2020-10-29
Publication date: 2024-01-16
Anticipated expiration: 2030-10-29
Also published as: CN220344550U; CN215192642U; CN220424025U; CN112741712B; CN114667118A; CN112741712A; CN215228888U; CN112741945B; WO2021083295A1; CN220344552U; CN114727873A; CN215960481U; WO2021083294A1; CN112741945A

Abstract

The application discloses an interventional instrument conveying system with a protective tube, which comprises a plurality of tube fittings and a control handle, wherein the tube fittings are coaxially arranged from inside to outside; the control handle is provided with one or more hydraulic cavities, and each hydraulic cavity is respectively and slidably provided with a piston; the plurality of pipe fittings comprise a first pipe fitting and a second pipe fitting which are sequentially and slidably nested from inside to outside, the second pipe fitting enters one of the hydraulic cavities and is fixed with a piston in the hydraulic cavity, and the first pipe fitting is connected with the pistons of the other hydraulic cavities in an extending manner or is fixed on a control handle; the outside of the second pipe fitting is also sleeved with a protection pipe, and the proximal end of the protection pipe is fixed with the control handle. This application adopts hydraulic drive mode, and the operation of being convenient for more sets up the protection pipe protection simultaneously and carries the pipe fitting, can realize auxiliary function such as exhaust as required.

Description

Interventional instrument conveying system with protective tube

Technical Field

The present application relates to the field of medical devices, and in particular to a delivery system for delivering interventional devices into the body.

Background

The interventional instrument conveying system generally comprises a control handle arranged at a proximal end, namely an operator side, a plurality of slender pipe fittings are internally and externally nested in a sliding mode, the proximal end of each pipe fitting is a control end and is connected to the control handle, the distal end of each pipe fitting is a working end and can be inserted into a body, conveying, releasing or recycling of the interventional instrument can be completed through mutual matching, and the control handle can be generally provided with a sliding or rotating part, and then relative movement between the pipe fittings along the axial direction is driven. The existing control handles are mostly regulated and controlled in a mechanical mode, along with the development of interventional instruments, more requirements are put on the functions of the interventional instruments, for example, the delivery system is required to realize the functions of valve release, recoverability, bending adjustment and the like, and the different functional modules are usually realized by independent driving modules, so that the control handles are relatively complicated in transmission, large in overall size and unfavorable for operation of surgery.

Disclosure of Invention

Aiming at the existing interventional instrument conveying system, the driving mode is further improved, the operation is more convenient, meanwhile, the protection pipe is arranged to protect the conveying pipe fitting, and auxiliary functions such as exhaust can be realized according to requirements.

An interventional instrument conveying system with a protective tube comprises a plurality of tube members coaxially arranged from inside to outside and a control handle for driving the tube members to move relatively, wherein the distal ends of the tube members are used for mutually matching operation of the interventional instrument, and the proximal ends of the tube members are connected to the control handle;

The control handle is provided with one or more hydraulic cavities, and each hydraulic cavity is respectively and slidably provided with a piston;

the plurality of pipe fittings comprise a first pipe fitting and a second pipe fitting which are sequentially and slidably nested from inside to outside, the second pipe fitting enters one of the hydraulic cavities and is fixed with a piston in the hydraulic cavity, and the first pipe fitting is connected to the pistons of other hydraulic cavities in an extending manner or is fixed on a control handle;

the outside of second pipe fitting still overlaps and is equipped with the protection tube, the proximal end of protection tube with the control handle is fixed mutually.

The following provides several alternatives, but not as additional limitations to the above-described overall scheme, and only further additions or preferences, each of which may be individually combined for the above-described overall scheme, or may be combined among multiple alternatives, without technical or logical contradictions.

Optionally, the hydraulic pressure chamber is first hydraulic pressure chamber, install fixed cover on the control handle, the proximal end of protection tube with the sealed butt joint of distal end of fixed cover, the proximal end of second pipe fitting is via the protection tube wears out fixed cover back further extends into first hydraulic pressure chamber.

Optionally, the fixed sleeve is provided with a through hole, the proximal end of the protection tube extends into the through hole and is fixedly connected with the hole wall in a sealing way, and the fixed sleeve is fixedly connected with the control handle.

Optionally, the periphery of fixed cover sets up annular constant head tank, and control handle includes first half shell and the second half of mutual lock and two half shell edges and this constant head tank block.

Optionally, the control handle fixed mounting has first cylinder, the inside of first cylinder is first hydraulic pressure chamber, and first cylinder has the distal end sealing plug, and the proximal end of fixed cover is equipped with the chamber of accomodating with the through-hole intercommunication, and the part of distal end sealing plug extends into and accomodates the chamber, and this part is sealed to be filled between the outer wall of fixed cover and second pipe fitting.

Optionally, the proximal end of the fixing sleeve is in sliding sealing fit with the outer wall of the second pipe fitting, a radial gap between the protection pipe and the second pipe fitting is a third exhaust gap, and a third exhaust hole communicated with the third exhaust gap is formed in the side wall of the fixing sleeve.

Optionally, a sliding seal matching part between the proximal end of the fixing sleeve and the outer wall of the second pipe fitting is used as a sealing point, and the axial position of the third exhaust hole is located between the proximal end of the protection pipe and the sealing point.

Optionally, the third exhaust hole is connected to the hydraulic driving circuit.

Optionally, the hydraulic drive circuit includes:

A hydraulic line for providing a fluid passage;

a drive pump in communication with the hydraulic line for driving the flow of liquid;

the multi-way switching valve is provided with a driving side interface communicated with the outlet and the inlet of the driving pump, a plurality of working side interfaces, two working side interfaces are communicated with corresponding hydraulic cavities, and one working side interface is communicated with the third exhaust hole;

the multi-way switching valve is provided with a plurality of gears and is used for switching the communication relation between the driving side interface and different working side interfaces so as to control the flow direction of liquid.

Optionally, an intermediate pipe is further coupled between the first pipe and the second pipe.

The interventional instrument conveying system adopts a hydraulic driving mode, is more convenient to operate, is provided with a protection pipe to protect conveying pipe fittings, and can realize auxiliary functions such as exhaust as required.

Drawings

FIG. 1 is a schematic diagram of an embodiment of an interventional instrument delivery system of the present application;

FIG. 2a is a schematic view of a distal portion of an interventional instrument delivery system of the present application;

FIG. 2b is a schematic illustration of an interventional instrument used in one embodiment of the present application;

FIG. 2c is a schematic illustration of an interventional instrument used in another embodiment of the present application;

FIG. 2d is a schematic view of the structure of the loading state of the interventional instrument;

FIG. 2e is a schematic view of the structure of the interventional instrument in a semi-released state;

FIG. 2f is a schematic view of the structure of the released state of the interventional instrument;

FIG. 3 is a schematic view of the proximal portion of the interventional instrument delivery system of the present application;

FIG. 4 is a schematic diagram of the internal structure of the intermediary mechanical delivery system of FIG. 3 (with a portion of the housing hidden);

FIG. 5 is a schematic view of the internal structure of another embodiment of the interventional instrument delivery system of the present application;

FIG. 6 is a schematic view of the mechanical transfer system of FIG. 5 after moving two cylinders;

FIG. 7 is a schematic view of the distal portion of the intermediary mechanical delivery system of FIG. 5;

FIG. 8 is a schematic view of the internal structure of the mechanical delivery system of FIG. 5 with two cylinders omitted;

FIG. 9 is a schematic diagram of the two pistons of the mechanical delivery system of FIG. 8 in position;

FIG. 10 is a schematic view of two cylinders in one embodiment of the interventional instrument delivery system of the present application;

FIG. 11 is a schematic view of the two cylinders of FIG. 10 at another angle;

FIG. 12 is an exploded view of the two cylinders of FIG. 10 (with the addition of a component mounting sleeve);

FIG. 13 is a side view of the two cylinders of FIG. 10;

FIG. 14 is a cross-sectional view A-A of FIG. 13;

FIG. 15 is a schematic view of a fluid reservoir in an embodiment of an interventional instrument delivery system of the present application;

FIG. 16 is a schematic view of a configuration of a drive pump portion in one embodiment of an interventional instrument delivery system of the present application;

FIG. 17 is a schematic view of the pump housing of the drive pump of FIG. 16;

FIG. 18 is a schematic view of the work piece structure of the drive pump of FIG. 16;

FIG. 19 is a schematic view of a multi-way switching valve in an embodiment of an interventional instrument delivery system of the present application;

FIG. 20 is an exploded view of the multi-way switching valve of FIG. 19;

FIG. 21 is a schematic view of the multi-way switch valve of FIG. 19 mounted to a control handle;

FIG. 22 is a schematic diagram of a valve core of the multi-way switching valve of FIG. 19;

FIG. 23 is a schematic view of another angular configuration of the valve cartridge of FIG. 22;

FIG. 24 is a schematic view of another angle structure of the multi-way switching valve of FIG. 19;

FIG. 25 is a schematic view of the configuration of a retaining sleeve in one embodiment of an interventional instrument delivery system of the present application;

FIG. 26 is a schematic view of the retaining sleeve of FIG. 25 at an alternative angle;

FIG. 27 is a cross-sectional view of a fixation sheath location in one embodiment of an interventional instrument delivery system of the present application;

FIG. 28 is a cross-sectional view of a first piston portion of an embodiment of an interventional instrument delivery system of the present application;

FIG. 29 is a cross-sectional view of a second piston portion of an embodiment of an interventional instrument delivery system of the present application;

FIG. 30 is a partial schematic view of two piston portions of one embodiment of an interventional instrument delivery system of the present application;

FIG. 31 is a schematic view of a first piston in an embodiment of an interventional instrument delivery system of the present application;

FIG. 32 is a schematic view of another angular configuration of the first piston of FIG. 31;

FIG. 33 is an exploded view of the first piston of FIG. 31;

FIG. 34 is a schematic view of the first piston of FIG. 31 with the sealing sleeve omitted;

FIG. 35 is a schematic view of another angular configuration of the first piston of FIG. 34 with the sealing sleeve omitted;

FIG. 36 is a schematic diagram of the hydraulic operating principle in one embodiment of the interventional instrument delivery system of the present application;

fig. 37 is an enlarged view of a portion of gear D1 in fig. 36;

FIG. 38 is a schematic diagram of the hydraulic operating principle in another embodiment of the interventional instrument delivery system of the present application;

fig. 39 is a schematic diagram of the hydraulic working principle in another embodiment of the interventional instrument delivery system of the present application.

Reference numerals in the drawings are described as follows:

1. a pipe fitting;

11. a first pipe fitting; 111. a guide head; 112. a mounting head; 113. a pipe joint; 114. a fastening sleeve; 12. a second pipe fitting; 121. a loading section; 122. a fastening sleeve; 13. a middle pipe fitting; 133. a fastening sleeve; 14. a protective tube;

2. a control handle;

21. a working section; 211. a distal end; 212. a proximal end; 22. a grip portion; 23. a positioning member; 24. a first half shell; 25. a second half shell; 26. positioning columns;

3. A cylinder;

31. a first cylinder; 311. a first hydraulic chamber; 312. a first chamber; 313. a second chamber; 314. a communication port; 315. a communication port; 32. a second cylinder; 321. a second hydraulic chamber; 322. a third chamber; 323. a fourth chamber; 324. a communication port; 325. A communication port; 33. a hydraulic line; 331. a first one-way valve; 332. a second one-way valve; 34. an isolation seal; 35. a distal end sealing plug; 36. a proximal sealing plug;

4. a first piston;

41. a fixed sealing part; 42. a sliding seal portion; 43. connecting sleeves; 431. a first overgas gap; 432. reinforcing ribs; 44. A support frame; 441. an avoidance groove; 45. sealing sleeve; 451. a recessed region; 46. a first exhaust hole; 47. a balance hole; 48. a balance valve core; 481. a linkage rod; 482. a sealing head; 49. a through hole;

5. driving a pump;

51. a pump housing; 52. a work piece; 53. a driving member; 531. a shaft hole; 54. an inlet; 55. an outlet; 56. a transfer port; 57. A pump chamber;

6. a multi-way switching valve;

61. a valve seat; 62. a valve core; 63. a wrench; 64. identification; 65. an interface; 66. a flow passage; 67. a drive side interface; 68. A working side interface;

7. a liquid storage tank;

71. a liquid injection port; 72. a liquid injection joint; 73. an inlet; 74. an outlet;

8. A fixed sleeve;

81. a through hole; 82. a third exhaust hole; 83. a positioning groove; 84. a storage chamber;

9. a second piston;

91. a fixed sealing part; 92. a sliding seal portion;

10. a bracket;

101. and a connecting lug.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

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 an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

It should be noted that the terms "proximal" and "distal" are relative to the operator. For example, in reference herein to a catheter or sheath, "proximal" refers to an end of the catheter that is proximal to the operator, i.e., into the body at a distance from the lesion (e.g., the end of the catheter that is connected to a control handle), and "distal" refers to an end of the catheter that is distal to the operator, i.e., into the body at a distance from the lesion (e.g., at the end of the catheter). 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 herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The present delivery system may be used to treat heart valves (e.g., mitral, aortic, tricuspid and/or pulmonary). The treatment may include, but is not limited to, valve replacement, valve repair, or other procedures that affect valve function. The systems and methods can use transcatheter means for delivering the catheter system, for example, by the venous or femoral approach; or by other minimally invasive surgical means including, but not limited to, delivering catheters via a transapical approach.

Referring to fig. 1, an interventional instrument delivery system according to one embodiment of the present application comprises a catheter system comprising a plurality of tubes 1 coaxially arranged from inside to outside, and a control handle 2 driving the relative movement of the plurality of tubes 1, the distal ends of the tubes being adapted to cooperate with each other for operating an interventional instrument, the proximal ends of the tubes being connected to the control handle 2, the relative movement of the tubes being hydraulically driven at the control handle 2.

According to the hydraulic control system, the hydraulic mode is adopted to drive each pipe fitting at the control handle, operation of the interventional instrument, such as release, cutting, rotation, grabbing or recovery, and the like, is realized, the whole hydraulic system is arranged at the near end, field debugging or assembly is facilitated, in-vitro solution is facilitated even if unexpected conditions occur, and if a hydraulic mechanism is arranged at the far end, more severe requirements are provided for equipment volume and safety, and the movement form and direction capable of being regulated and controlled are limited due to equipment problems.

The plurality of tubes is understood to be at least two, in particular, any two tubes can be in sliding fit, that is, all parts between two tubes have axial relative displacement during movement, and of course, if a deformable connecting piece is additionally arranged between two tubes, the relative movement relationship of the connecting piece is additionally considered.

It is also possible to use a fixed connection between two tubes, for example, two tubes that are radially adjacent to each other (e.g., fixed to each other at the distal end), and since the two tubes are fixed to each other only at the distal end, a small amount of relative displacement between the two tubes can be allowed at the proximal end, and of course, such relative movement will cause one of them to deform and bend after being transferred to the distal end, and the bending of the distal end of a tube can be achieved by using this feature.

The number of tubes 1 may be two, three or more, the relative movements of the different tubes 1 enabling the corresponding manipulation of the interventional instrument, e.g. delivery, release, posture adjustment, retrieval etc., at the distal end (away from the operator, i.e. into the body at the end near the lesion in use, and vice versa), may be performed in accordance with conventional techniques, with regard to the individual tubes 1 themselves and the distal end function, although improvements regarding the distal end configuration of the tubes are provided hereinafter. One of the key points of the application is that a liquid driving mode is adopted at the operating handle to drive the relative movement of different pipe fittings.

Referring to fig. 2a, in one embodiment, the plurality of tubes includes a first tube 11 and a second tube 12 slidably nested one inside another, the distal end of the first tube 11 being adapted to receive an interventional instrument, and the distal end of the second tube 12 wrapping around or releasing the interventional instrument when the two tubes are moved relative to each other. The outer proximal end of the second tube member 12 may also be sleeved with a protective tube (not shown in fig. 1 and 2 a) fixedly connected to the control handle.

The most distal end of the first tube 11 is a guiding head 111, a mounting head 112 is further fixed adjacent to the proximal end of the guiding head 111, the interventional device is located between the guiding head 111 and the mounting head 112 and is compressed radially when being loaded, the interventional device is generally provided with connecting lugs, the outer wall of the mounting head is generally provided with grooves or protruding heads for being matched with the connecting lugs of the interventional device, the connecting lugs are clamped with the grooves of the mounting head 112 or hung on the protruding heads to limit the axial position of the interventional device when being loaded, and more fixing modes of the connecting lugs and the mounting head can refer to WO2019080857A 1.

Referring to fig. 2b and 2C, the interventional device according to the present application is not limited in particular shape, and may include a stent 10, for example, with a connecting ear 101 at one axial end of the stent 10, where the connecting ear 101 may have an expansion head at its end, and may have a ring-shaped or C-shaped connecting portion.

The stent 10 is a radially compressible or expandable structure, typically a mesh-like structure formed by cutting or braiding.

With reference to fig. 2d to 2f, the distal end of the second tube 12 is a loading section 121, the interventional device is radially compressed in the loading state, the loading section 121 is wrapped around the periphery of the interventional device to limit the radial expansion of the interventional device, the second tube 12 is driven to axially slide and retract relative to the first tube 11 by a control handle after the interventional device is in place, so that the interventional device is gradually exposed in a human body vessel to allow the interventional device to radially expand, the interventional device enters a semi-release state from the expansion of the distal end, the interventional device is completely exposed along with the further retraction of the second tube 12, and finally, the connecting lugs of the interventional device are separated from the mounting heads and enter the release state to finish the release of the interventional device. The axial relative sliding of the first tube member 11 and the second tube member 12 is driven by the control handle 2 in the whole process.

The first tube member 11 and the second tube member 12 are plastic tubes commonly used in the field of interventional instruments, or metal tubes such as cut hypotubes or metal braided tubes or metal braided tube-hypotube hybrid tubes. The first pipe 11 and/or the second pipe 12 may also be a multilayer composite pipe.

Referring to fig. 3 and 4, the control handle 2 is provided with a hydraulic cavity, namely a first hydraulic cavity 311, two pipes adjacent to each other in the radial direction are a first pipe 11 and a second pipe 12 sleeved outside the first pipe, the second pipe 12 at the outer layer enters the first hydraulic cavity 311 to be fixed with the first piston 4 in the first hydraulic cavity 311, and the first pipe 11 at the inner layer extends out of the first hydraulic cavity 311 and is fixed on the control handle 2.

The shape of the control handle 2 is not strictly limited, and for the convenience of packaging other components, a split structure may be adopted, that is, the control handle 2 includes a first half-shell 24 and a second half-shell 25 that are mutually buckled, and of course, for the convenience of local maintenance or operation, the control handle may be divided into more parts.

In order to facilitate the mutual fixation between the first half shell 24 and the second half shell 25, a plurality of modes of fastening and fastening can be adopted, in this embodiment, at least one of the first half shell 24 and the second half shell 25 is provided with a positioning column 26, a screw hole is arranged on the positioning column 26, and the other is correspondingly provided with a mounting hole for penetrating a bolt, and the two are fixed by the bolt;

or both are provided with positioning columns 26, the positions of which are matched, one positioning column is provided with a positioning hole, and the other positioning column is directly clamped into the corresponding positioning hole.

In other embodiments, the first and second half shells 24, 25 may also be secured by bonding or welding.

In different embodiments, the hydraulic cavity is directly arranged inside the control handle 2, or the control handle 2 is fixedly provided with the cylinder barrel 3, and the hydraulic cavity is arranged inside the cylinder barrel 3. The cylinder 3 is not strictly limited in cross section, and the outer periphery is preferably formed by a smooth curve, such as a circle or an ellipse, and the cylinder is shown as a whole in a cylindrical shape by taking a circular cross section as an example.

In this embodiment, the control handle 2 is fixed with a first cylinder 31 inside, the hydraulic chamber inside the first cylinder 31 is a first hydraulic chamber 311, and the piston inside the hydraulic chamber is a first piston 4 slidably mounted in the first hydraulic chamber 311.

In order to protect the first cylinder 31, the first half-shell 24 and the second half-shell 25 enclose the first cylinder 31 in a snap-fit manner, and in a preferred embodiment, a positioning member 23 is provided on the control handle 2, which member cooperates with the first cylinder 31. For example, in fig. 4, the positioning member 23 is one or more positioning steps, and the positioning steps have a shape corresponding to the outer contour of the first cylinder 31 so as to clamp and fix the first cylinder 31.

Although the shape of the control handle 2 is not strictly limited, for convenience of operation, the control handle 2 includes a working portion 21 and a grip portion 22 connected to the working portion 21 in the preferred embodiment. The first cylinder 31 is located within the working portion 21, i.e. the working portion 21 as a whole is adapted to provide a first hydraulic chamber 311, the working portion 21 having opposite distal and proximal ends 211, 212.

The working part 21 and the holding part 22 are integrally connected or detachably connected, so that the storage is convenient due to the small volume, and the connecting part of the working part 21 and the holding part 22 can be assembled quickly by adopting a buckling or threading mode.

The shape of the holding portion 22 is convenient for holding operation, for example, the holding portion has a length direction as a whole, and since the cylinder is installed in the working portion 21, the movement direction of the piston in the cylinder is taken as the cylinder axial direction, and in this embodiment, the length direction of the holding portion 22 is substantially perpendicular to the cylinder axial direction, or slightly inclined. The overall shape of the control handle 2 in this embodiment is similar to a pistol shape in order to further enhance the grip and to conform to the hand shape characteristics, in that the working portion 21 and the grip portion 22 are generally L-shaped. Hydraulically actuated control means, such as a switch or the like, may be provided on the grip 22 to facilitate one-handed operation.

In other embodiments, the length of the grip 22 may also be substantially parallel to the cylinder axis, or even aligned with each other. The overall shape of the control handle 2 is bar-shaped.

In a preferred embodiment, the grip 22 is connected to the proximal end 212 of the working portion 21. And each tube extends further distally from the distal end 211 of the working portion 21 out of the control handle 2.

In order to adopt the relative motion of hydraulic drive pipe fitting, further improved the connected mode of pipe fitting and piston in this application embodiment, directly penetrate the cylinder with the pipe fitting for the structure is further compact, improves the integrated level.

Referring to fig. 4 (in which the first cylinder 31 is removed to avoid interference of components, the hydraulic chamber and the chambers are shown with reference to the relative positions of the chambers and the piston, and other relevant views are the same), the hydraulic chamber in this embodiment is a first hydraulic chamber 311; the piston is a first piston 4 which is slidably arranged in the first hydraulic cavity 311, the proximal end of the second pipe fitting 12 penetrates into the first hydraulic cavity 311 and is fixedly connected with the first piston 4, and the proximal end of the first pipe fitting 11 penetrates out of the first piston 4 through the second pipe fitting 12 and then further extends until being fixedly connected with the control handle 2.

With respect to the working portion 21 of the control handle 2, the second tube member 12 extends from the distal end 211 of the working portion 21 into the first hydraulic chamber 311, and the first tube member 11 extends and is connected to the proximal end 212 of the working portion 21.

Because the proximal end of the first pipe fitting 11 is fixedly connected with the control handle 2, the first piston 4 can drive the second pipe fitting 12 to axially slide relative to the first pipe fitting 11 when moving, and corresponding functions are realized at the distal ends of the two pipe fittings.

Specifically, the first piston 4 divides the first hydraulic chamber 311 into a first chamber 312 and a second chamber 313, each chamber is connected to the hydraulic driving circuit through a corresponding communication port, the proximal end of the second pipe 12 penetrates into the first chamber 312 and is fixedly connected with the first piston 4, and the proximal end of the first pipe 11 penetrates out of the first piston 4 through the second pipe 12 and then extends out of the first hydraulic chamber 311 through the second chamber 313.

Of course, as a hydraulic driving mode, the parts of the pipe fittings, which enter and exit the first cylinder 31, are all required to be sealed, and fixed sealing or sliding sealing is correspondingly adopted according to the movement relation of the pipe fittings relative to the first cylinder 31.

Each communication port is arranged on the first cylinder 31, the hydraulic driving circuit is used for driving the first piston 4 in the first cylinder 31 to reciprocate, necessary control devices such as a pump valve and the like can be arranged on the hydraulic driving circuit according to requirements, and in order to further improve the integration level, the hydraulic driving circuit is arranged on the control handle 2 and used for driving the first piston 4 to enable each pipe fitting to relatively move in one embodiment.

The interior of the first tube member 11 may be used for threading a guide wire or the like, whereby the proximal end of the first tube member 11 is fixed to the control handle 2, and in one embodiment the proximal end of the working portion 21 is fitted with a line connection 113, and the first tube member 11 extends and is connected to the line connection 113. The pipe joint 113 may be a luer joint, and may be in butt-joint communication with the first pipe fitting 11, or may be configured to perform an air-discharging operation by introducing physiological saline into the first pipe fitting 11 through the pipe joint 113 as needed. The proximal end of the first tube member 11 may be directly secured to the pipe joint 113 or may be connected to the pipe joint 113 by a fastening sleeve 114, and the fastening sleeve 114 may be filled between the outer wall of the first tube member 11 and the inner wall of the pipe joint 113 to achieve fastening and sealing.

In the embodiment of fig. 5 to 9, the control handle 2 is provided with two hydraulic chambers, namely a first hydraulic chamber 311 and a second hydraulic chamber 321, and the plurality of pipe members comprises a first pipe member 11, a middle pipe member 13 and a second pipe member 12 which are sequentially and slidably nested from inside to outside;

two pipes that are radially adjacent to each other with different reference objects can be considered as two groups:

the first group is a middle pipe fitting 13 and a second pipe fitting 12 sleeved outside the middle pipe fitting 13, the second pipe fitting 12 positioned at the outer layer enters the first hydraulic cavity 311 to be fixed with the first piston 4 in the first hydraulic cavity 311, the middle pipe fitting 13 positioned at the inner layer extends out of the first hydraulic cavity 311 and is connected to the second piston 9 in the second hydraulic cavity 321.

The second group is a first pipe fitting 11 and an intermediate pipe fitting 13 sleeved outside the first pipe fitting 11, the intermediate pipe fitting 13 at the outer layer enters the second hydraulic cavity 321 to be fixed with the second piston 9 in the second hydraulic cavity 321, and the first pipe fitting 11 at the inner layer extends out of the second hydraulic cavity 321 and is fixed on the control handle 2.

The control handle 2 is internally provided with a first cylinder 31 and a second cylinder 32, the two cylinders respectively provide a first hydraulic cavity 311 and a second hydraulic cavity 321, the first cylinder 31 and the second cylinder 32 are coaxially arranged and mutually butted, an isolation sealing piece 34 is arranged at the butted part, and the near end of the middle pipe fitting 13 is in sliding sealing and penetrates through the isolation sealing piece 34 to enter the second hydraulic cavity 321.

Three tubes are sequentially nested in a sliding way from inside to outside, wherein:

the distal end of the first tube member 11 is used for placement of an interventional instrument;

the distal end of the intermediate tube member 13 is provided with a lock member for restraining the interventional instrument to the first tube member 11; the axial sliding of the intermediate pipe fitting 13 relative to the first pipe fitting 11 can enable the locking piece to change the matching relation with the mounting head on the first pipe fitting 11;

the distal end of the second tube member 12 carries a loading section for wrapping or releasing the interventional instrument.

The first tube 11 and the interventional instrument may be separated from each other in the body, i.e. the interventional instrument remains in the body; it is also possible to interconnect, the interventional instrument does not remain in the body after the operation is completed, but is withdrawn outside the body with the first tube member 11.

In one embodiment, the distal end of the intermediate tube 13 may be fixedly connected to the first tube 11 for pulling the bending adjustment, changing the pose of the interventional instrument for accurate positioning. The connection of the intermediate tube member 13 to the first tube member 11 at the distal end may be adjacent to the mounting head on the first tube member 11, for example, on the proximal side of the mounting head, although the distal end of the intermediate tube member 13 may be directly secured to the mounting head.

At the second cylinder 32, the second piston 9 divides the second hydraulic chamber 321 into a third chamber 322 and a fourth chamber 323, each chamber is connected to the hydraulic driving circuit through a corresponding communication port, the proximal end of the middle pipe fitting 13 penetrates into the third chamber 322 and is fixedly connected with the second piston 9, the proximal end of the first pipe fitting 11 penetrates out of the second piston 9 through the middle pipe fitting 13, and then extends out of the second hydraulic chamber 321 through the fourth chamber 323.

The proximal end of the corresponding working portion 21 is fitted with a line fitting, and the first tube member 11 extends and is connected to the line fitting 113.

The first chamber 312 and the second chamber 313 are divided according to the first piston 4, the third chamber 322 and the fourth chamber 323 are divided according to the second piston 9, and the volumes of the chambers are also changed correspondingly, not fixedly changed, because the positions of the two pistons are movable.

With reference to fig. 8 and 9, when only the first piston 4 moves distally, the second tube 12 is driven to move distally, and the positions of the first tube 11 and the intermediate tube 13 are unchanged. The same applies to the proximal movement of the first piston 4.

When only the second piston 9 moves distally, the intermediate tube 13 is driven to move distally, while the positions of the first tube 11 and the second tube 12 are unchanged. The same applies to the proximal movement of the second piston 9.

In order to further improve the integration degree in one embodiment of the present application, a hydraulic driving circuit for driving the relative movement of the pipe elements by the piston is further disposed at the control handle 2. The hydraulic drive circuits are all arranged on the control handle 2, so that lengthy external pipelines can be avoided, and the interference of components during the hand-held mobile operation is reduced.

In one embodiment, a hydraulic drive circuit includes:

A hydraulic line for providing a fluid passage in communication with each of the hydraulic chambers;

a drive pump 5 which is communicated with the hydraulic pipeline and is used for driving the liquid to flow;

and the control valve is communicated with the hydraulic pipeline and used for controlling the flow direction of liquid.

The hydraulic line is generally a pipe for connecting each component in the hydraulic drive circuit, and since the hydraulic drive circuit is disposed in the control handle 2, it is preferable that all or most of the hydraulic line is housed in the control handle 2, and the hydraulic line is omitted in each drawing of the specific structure in this application, and since the connection relationship between each component is explicitly described, the hydraulic line can be disposed as needed in the implementation process, and since the hydraulic line generally adopts a hose, how to house it in the control handle 2 can be implemented as needed.

When the hydraulic pipeline is used, liquid is filled, the pushing piston is changed to reciprocate through the liquid flow direction, and in order to improve the safety, the liquid in the hydraulic driving circuit is physiological saline.

Corresponding control valves are arranged in the hydraulic drive circuit, which can control the flow direction of the liquid, change the movement direction of the piston or realize other auxiliary functions, for example, the control valves can comprise one-way valves respectively arranged at the outlet and the inlet of the drive pump 5 and a multi-way switching valve 6 for switching the movement direction of the piston.

In order to buffer and temporarily store the liquid, in one embodiment, the hydraulic driving circuit further includes a liquid storage tank 7 communicated with the hydraulic pipeline for temporarily storing the liquid, the liquid storage tank 7 may be integrally installed in the control handle 2, and in order to fill the liquid in advance or in use, the liquid storage tank 7 is provided with a liquid filling port 71.

The liquid storage tank 7 not only has an outlet and an inlet communicated with a hydraulic pipeline, but also can be provided with a liquid injection port 71 alone, and a valve can be arranged at the liquid injection port 71 alone for connecting with external liquid filling equipment, and in a preferred embodiment, liquid filling can be realized by using the driving pump 5.

For example, in one embodiment, the control handle 2 is provided with a liquid filling joint 72, and the liquid filling joint 72 is communicated with the liquid filling port 71 by driving the pump 5 to fill the liquid storage tank 7 with liquid.

The external liquid filling device is connected with the liquid filling joint 72, and liquid is filled into the liquid storage tank 7 through the driving pump 5, so that the external pressurizing device can be omitted, and the liquid filling is realized by fully utilizing the hydraulic driving loop of the interventional instrument conveying system.

In one embodiment, a control valve includes:

the multi-way switching valve 6 is provided with a driving side interface communicated with the outlet and inlet of the driving pump 5 and a plurality of working side interfaces, wherein each two working side interfaces are communicated with one hydraulic cavity, and the multi-way switching valve 6 is provided with a plurality of gears for switching the communication relationship between the driving side interfaces and different working side interfaces so as to control the flow direction of liquid.

The multi-way switching valve 6 can switch the communication relation between each hydraulic cavity and the outlet and inlet of the driving pump 5 through different gears, so that the change of the movement direction of the piston can be realized. The two one-way valves can avoid unnecessary backflow of liquid at the driving pump 5 and ensure the liquid conveying efficiency.

The drive-side interface and the working-side interface are merely distinguished by different communication means, and for the multi-way switching valve 6 itself, only a plurality of different interfaces.

In one embodiment, the control valve further comprises:

the outlets of the drive pumps 5 are communicated to one of the drive side interfaces through the first one-way valve; the inlet of the drive pump is communicated to the other drive side interface through the second one-way valve and the liquid storage tank 7 in sequence.

In order to further indicate the operation, the multi-way switching valve 6 is embedded in the control handle 2, and the control handle 2 is provided with a mark for indicating the gear position of the multi-way switching valve 6.

Referring to fig. 10 to 14, in an embodiment of the present application, the first cylinder 31 and the second cylinder 32 are coaxially arranged and are butted with each other by the isolation seal 34, the distal end of the first cylinder 31 is provided with a distal end sealing plug 35, and the first cylinder 31 is further provided with a communication port 314 and a communication port 315 for connecting a hydraulic driving circuit. The proximal end of the second cylinder 32 is provided with a proximal sealing plug 36, and the second cylinder 32 is further provided with a communication port 324 and a communication port 325 for connection to a hydraulic drive circuit.

The second tube member 12 is connected to the first piston 4 by a sliding sealed through distal sealing plug 35, the intermediate tube member 13 and the first tube member 11 extend out of the first piston 4 inside the second tube member 12, the intermediate tube member 13 is connected to the second piston 9 by a further sliding sealed through isolating seal 34, the first tube member 11 extends out of the second piston 9 inside the intermediate tube member 13, and a further fixed sealed through proximal sealing plug 36 is connected to the control handle 2.

With reference to fig. 8 and 9, when only the first piston 4 moves distally, the second tube 12 is driven to move distally, while the positions of the intermediate tube 13 and the first tube 11 are unchanged. The same applies to the proximal movement of the first piston 4.

Referring to fig. 15, in an embodiment, the liquid storage tank 7 has a cylindrical structure with two closed ends, the bottom end of the liquid storage tank 7 is provided with a liquid injection port 71, the side wall is provided with an inlet 73 and an outlet 74, and the liquid storage tank is connected to a hydraulic driving circuit through the inlet 73 and the outlet 74.

Referring to fig. 16 to 18, in an embodiment, driving the pump 5 includes:

a pump housing 51 fixed to the control handle (the first half 24 of which is shown) and connected to the hydraulic drive circuit;

A work piece 52 movably mounted within the pump housing 51 for driving the flow of liquid;

and a driving member 53 movably mounted to the control handle and coupled to the working member 52.

The pump housing 51 is internally provided with a pump chamber 57, the pump housing 51 is provided with an inlet 54 and an outlet 55 which are communicated with the pump chamber 57, and the inlet 54 and the outlet 55 are connected into a hydraulic drive circuit.

When the liquid storage tank 7 is required to be matched with the liquid injection port 71, the first half shell 24 is also fixedly provided with a liquid injection connector 72, the corresponding pump shell 51 is provided with a transfer port 56 communicated with the pump chamber 57, and during liquid injection, liquid sequentially enters the pump chamber 57 through the liquid injection port 71 and the transfer port 56 and then sequentially enters the liquid storage tank 7 through the outlet 55 and the liquid injection port 71, so that a liquid injection pipeline can be independently configured for liquid injection, and a necessary control valve is arranged to avoid interference with a hydraulic driving loop.

The working member 52 is linearly reciprocated or circularly moved in the pump housing 51 to drive the flow of the liquid, and a common form may be in the form of an impeller or a plunger. In one embodiment, the working member 52 is a plunger, and the driving member 53 directly abuts against the plunger or is linked with the plunger through a transmission mechanism.

The driving member 53 is an electric member, a pneumatic member or a hand workpiece, the driving member 53 is used for driving the working member 52 to move, a structure or split linkage can be adopted between the driving member 53 and the working member 52, and according to different forms of power sources, the hand workpiece is preferably adopted for simplifying the structure, namely, the working member 52 is manually operated, and the basic function can be realized by using electric or pneumatic operation.

In one embodiment, the hand piece is an operating knob slidably or rotatably mounted to the control handle.

In one embodiment, the driving member 53 has a shaft hole 531 and is mounted on a control handle via a rotation shaft, the control handle includes a working portion for providing a hydraulic chamber and a grip portion 22 connected to the working portion, and the operation knob is mounted on the grip portion 22. So that the pump 5 can be driven by one hand while being held.

In one embodiment, the drive pump 5 further comprises a reset member acting between the operating knob and the control handle. The driving piece 53 and the acting piece 52 can be in abutting fit, and can be connected through a limiting structure or a traction piece, so that the driving piece 53 can reciprocate with the acting piece 52 at the time of resetting. A restoring member, such as a compression spring or a tension spring acting on the driving member 53 or a coil spring mounted on the rotating shaft, may be disposed between the driving member 53 and the control handle, so that the restoring member may directly act on the acting member 52 for reciprocating the acting member 52, such as a compression spring located in the pump chamber 57 and directly abutting against the acting member 52. In use, the driving member 53 is repeatedly pressed and the working member 52 is then driven to cause fluid to flow in the hydraulic drive circuit.

Referring to fig. 19 to 24, in an embodiment, the multi-way switching valve 6 includes a valve seat 61 and a valve core 62 that are matched with each other, a valve cavity is provided in the valve seat 61, a plurality of ports 65 are provided on a side wall of the valve cavity for connecting a driving pump and each hydraulic cavity, the valve core 62 is placed in the valve cavity and is in running fit, a plurality of flow passages 66 are provided on an outer peripheral wall of the valve core 62, when the valve core 62 rotates to different positions, a corresponding communication relationship exists between the plurality of flow passages 66 and the plurality of ports 65, and for convenience of identification, in an embodiment, the multi-way switching valve 6 is embedded in the control handle 2, and a mark 64 indicating a gear position of the multi-way switching valve 6 is provided on the control handle 2.

The valve core 62 is connected with a wrench 63, and the wrench rotates to different angles to point to the marks 64 of different gears, in this embodiment, in order to match the functions of different gears, seven flow channels 66 (indicated by arrows in fig. 24) are provided, the specific functions of which are further described in other embodiments below, and of course, the flow channels 66 can be increased or decreased correspondingly according to the functions to be realized.

In order to establish a stable interventional channel, in combination with fig. 6, 7, 12-14 and 25-27, in one embodiment, an interventional instrument delivery system with a protective tube is provided, which comprises a plurality of tube members 1 coaxially arranged from inside to outside, and a control handle 2 for driving the relative movement of the plurality of tube members 1, wherein the distal ends of the tube members 1 are used for mutually cooperating with each other to operate an interventional instrument, the proximal ends of the tube members 1 are connected to the control handle 2, and the relative movement of the tube members 1 is driven by hydraulic means at the control handle 2;

the control handle 2 is provided with one or more hydraulic cavities, and pistons are respectively and slidably arranged in the hydraulic cavities;

the plurality of pipe fittings 1 comprise a first pipe fitting 11 and a second pipe fitting 12 which are sequentially and slidably nested from inside to outside, the second pipe fitting 12 enters one of the hydraulic cavities and is fixed with a piston in the hydraulic cavity, and the first pipe fitting 11 is connected with the pistons of other hydraulic cavities in an extending manner or is fixed on the control handle 2;

The outside of the second pipe fitting 12 is also sleeved with a protective tube 14, and the proximal end of the protective tube 14 is fixed with the control handle 2.

The protecting tube 14 is fixedly installed relative to the control handle and is positioned at the periphery of the second tube fitting 12, the intervention is implemented through a channel established by the protecting tube 14, the blood vessel can be prevented from being scratched when the second tube fitting 12 reciprocates, the length of the protecting tube 14, namely the position of the far end of the protecting tube 14 can be determined according to the length of the intervention path, the near end of the protecting tube 14 is fixed at the far end side of the control handle 2, and the near end of the second tube fitting 12 penetrates out of the protecting tube 14 and then enters the first cylinder barrel.

To facilitate the mounting of the proximal end of the protective tube 14, in one embodiment, the control handle is provided with a retaining sleeve 8, the proximal end of the protective tube 14 sealingly abuts the distal end of the retaining sleeve 8, and the proximal end of the second tube member 12 extends further into the first hydraulic chamber after passing out of the retaining sleeve 8 via the protective tube 14.

The fixing sleeve 8 is provided with a through hole 81, the proximal end of the protecting tube 14 extends into the through hole 81 and is fixedly connected with the hole wall in a sealing way through bonding, welding, interference fit and other ways, the fixing sleeve 8 and the control handle 2 can be fixed in a clamping way or a fastening way and other ways, in one embodiment, the periphery of the fixing sleeve 8 is provided with an annular positioning groove 83, and the edges of the two half shells of the control handle 2 are clamped with the positioning groove 83. Corresponding portions of the first half-shell 24 snap into detents 83 to limit the axial position of the retaining sleeve 8, as seen for example in fig. 27.

Since the second tube member 12 needs to slide reciprocally, the proximal end of the fixing sleeve 8 is in sliding sealing engagement with the outer wall of the second tube member 12, wherein the sliding sealing engagement may be direct contact engagement between the inner wall of the through hole 81 and the outer wall of the second tube member 12 or indirect engagement through other members.

In one embodiment, the first cylinder is provided with a distal sealing plug 35, the proximal end of the retaining sleeve 8 being provided with a receiving cavity 84 communicating with the through hole 81, a portion of the distal sealing plug 35 extending into the receiving cavity 84, the portion being sealingly filled between the retaining sleeve 8 and the outer wall of the second tube member 12. I.e. with an indirect sliding sealing fit, the second tube member 12 passes from the stationary sleeve 8 through the distal sealing plug 35 and into the hydraulic chamber in the first cylinder.

Since the protection tube 14 and the second tube 12 need to slide relatively, a radial gap is sometimes reserved, and the radial gap needs to be exhausted during operation.

In one embodiment, the proximal end of the fixing sleeve 8 is in sliding sealing fit with the outer wall of the second pipe fitting 12, the radial gap between the protection pipe 14 and the second pipe fitting 12 is a third exhaust gap, and a third exhaust hole 82 communicated with the third exhaust gap is formed in the side wall of the fixing sleeve 8.

The sliding seal matching part of the proximal end of the fixing sleeve 8 and the outer wall of the second pipe fitting 12 is used as a sealing point, and the axial position of the third exhaust hole 82 is located between the proximal end of the protection pipe 14 and the sealing point, so that the proximal side of the sealing point is not affected when the exhaust is performed, and the normal operation of the hydraulic cavity is not affected.

In order to make full use of the existing hydraulic drive circuit, the third exhaust port 82 is connected to the hydraulic drive circuit. One of the working side ports, such as a multi-way switching valve, communicates with the third exhaust port 82; the multi-way switching valve has a plurality of gears, wherein one gear is communicated with the outlet of the driving pump and the third exhaust hole 82, and then the exhaust can be performed in a liquid filling mode.

Referring to fig. 28 to 35, pistons are disposed in the respective hydraulic chambers, and each piston may have the same structure, but only the positions and the pipe passing through the pistons are different, without affecting the structural characteristics and the working principle thereof.

Two pipe fittings that are adjacent in radial position include outer pipe fitting and inlayer pipe fitting, and each piston includes:

the fixed sealing part is sleeved on the outer pipe fitting and is fixedly matched with the outer wall of the outer pipe fitting in a sealing manner;

the sliding sealing part is sleeved on the inner pipe fitting and is in sliding sealing fit with the outer wall of the inner pipe fitting;

the fixed sealing part and the sliding sealing part are fixedly connected, and at least one of the fixed sealing part and the sliding sealing part is in sliding sealing fit with the inner wall of the hydraulic cavity.

In an embodiment, the two radially adjacent tubes comprise an outer tube 12 and an inner tube 13, respectively, the first piston 4 comprising:

A fixed sealing part 41 sleeved on the second pipe fitting 12 and fixedly sealed and matched with the outer wall of the second pipe fitting 12;

a sliding sealing part 42 sleeved on the middle pipe fitting 13 and matched with the outer wall of the middle pipe fitting 13 in a sliding sealing manner;

the fixed seal portion 41 and the sliding seal portion 42 are fixedly connected, and an outer portion Zhou Jun of the fixed seal portion and the sliding seal portion are in sliding seal fit with an inner wall of the first hydraulic chamber.

The first piston 4 is provided with a through hole extending along the axis, and the proximal end of the second tube member 12 is fixedly connected in the through hole by a fastening sleeve 122, which fastening sleeve 122 can fill radial gaps on the one hand and facilitate axial positioning and assembly on the other hand. The first piston 4 is fixedly connected with the second pipe fitting 12 and is in sliding fit with the middle pipe fitting 13, so that the first piston 4 can drive the second pipe fitting 12 when moving, but the position of the middle pipe fitting 13 is not affected.

In an embodiment, the two radially adjacent tubes comprise an outer tube 13, the middle tube, and an inner tube 11, the first tube, the second piston 9 comprising:

a fixed sealing part 91 sleeved on the middle pipe fitting 13 and fixedly sealed and matched with the outer wall of the middle pipe fitting 13;

the sliding sealing part 92 is sleeved on the first pipe fitting 11 and is in sliding sealing fit with the outer wall of the first pipe fitting 11;

The fixed seal portion 91 and the sliding seal portion 92 are fixedly connected, and the outer portions Zhou Jun of the fixed seal portion and the sliding seal portion are in sliding seal fit with the inner wall of the second hydraulic chamber.

The second piston 9 has a through hole extending along the axis, in which the proximal end of the intermediate tube 13 is fixedly connected by a fastening sleeve 133, which fastening sleeve 133 on the one hand fills the radial gap and in addition facilitates axial positioning and assembly. The second piston 9 is fixedly connected with the middle pipe fitting 13 and is in sliding fit with the first pipe fitting 11, so that the second piston 9 can drive the middle pipe fitting 13 when moving, but the position of the first pipe fitting 11 is not affected.

The proximal end of the first pipe fitting 11 is fixedly connected to the pipe joint 113 through a fastening sleeve 114 after penetrating out of the second hydraulic chamber.

The radial gap between two adjacent pipes in radial direction is an exhaust gap, and the hydraulic drive circuit is also communicated with the exhaust gap for exhausting. The auxiliary function of hydraulic drive can be fully exerted, the exhaust is realized in a liquid filling mode, and additional exhaust equipment is omitted.

The present application further improves the structure of the piston in order to incorporate the venting function.

In one embodiment, the piston is provided with a balance hole, and a balance valve core is arranged in the balance hole; the piston is also provided with an exhaust hole communicated with the exhaust gap, and the exhaust hole is positioned between the fixed sealing part and the sliding sealing part; the piston divides the hydraulic cavity into two chambers, and when the pressure in the two chambers approaches, the balance valve core is opened to enable the two chambers and the exhaust hole to be communicated.

Since the two pistons are identical in structure, the first piston 4 will be taken as an example, and the second piston 9 will be the same. The fixed seal 41 and the sliding seal 42 of the first piston 4 are fixed to each other by a connecting sleeve 43.

The fixed sealing part 41 and the sliding sealing part 42 each comprise a supporting frame 44 and a sealing sleeve 45 wrapping the outer parts of the supporting frames 44, and the connecting sleeve 43 is fixed between the two supporting frames 44.

The radial clearance between the second pipe fitting 12 and the middle pipe fitting 13 is a first exhaust clearance, and the side wall of the connecting sleeve 43 in the first piston 4 is provided with a first exhaust hole 46 communicated with the first exhaust clearance; a first air gap 431 communicating with the first exhaust hole 46 is left between the outer wall of the connecting sleeve 43 and the inner wall of the first hydraulic chamber in the first piston 4, and the axial position of the first air gap 431 is between the fixed seal portion 41 and the sliding seal portion 42 of the first piston 4.

The first exhaust holes 46 may be formed in plurality along the circumferential direction of the connecting sleeve 43 to ensure fluid passing.

Similarly, the radial gap between the middle pipe fitting 13 and the first pipe fitting 11 is a second exhaust gap, and a second exhaust hole communicated with the second exhaust gap is formed in the side wall of the connecting sleeve in the second piston 9.

A second air gap communicated with the second exhaust hole is reserved between the outer wall of the connecting sleeve in the second piston 9 and the inner wall of the second hydraulic cavity, and the axial position of the second air gap is positioned between the fixed sealing part 91 and the sliding sealing part 92 of the second piston 9.

In one embodiment, the support stand 44 includes:

an annular portion abutting against an axial end of the connecting sleeve 43;

a support plate fixed on the periphery of the annular part, and a sealing sleeve 45 is wrapped on the support plate.

The annular part and the connecting sleeve 43 can be of an integral structure, namely, two axial ends of the connecting sleeve 43 are annular parts, and the supporting disc is a disc of a frame structure. In order to secure strength, a plurality of reinforcing ribs 432 are further provided on the outer circumference of the connecting sleeve 43, and the reinforcing ribs 432 are connected between the fixed seal portion 41 and the supporting frame 44 of the sliding seal portion 42.

Through holes 49 are formed in each support frame 44 and each sealing sleeve 45, the connecting sleeves 43 in the support frames 44 are of an axial through structure, through areas are through holes, positions of the through holes 49 in the sealing sleeves 45 are corresponding, each through hole is used for penetrating through a pipe fitting, according to different positions of a piston, the through holes which are matched with the inner edges of the through holes directly can be through holes of the second pipe fitting 12, the middle pipe fitting 13 or the first pipe fitting 11, the through holes are matched with each other in a sealing mode at penetrating positions, and the peripheries of the sealing sleeves 45 are matched with the inner walls of the hydraulic cavities in a sliding sealing mode.

The fixed sealing portion 41 and the sliding sealing portion 42 are respectively provided with a balance hole 47 communicated with the first air passing gap 431, and since the support plate is of a frame structure, the balance holes 47 are directly formed on the sealing sleeves 45 on each side, and in order to avoid the balance valve core 48, the support frame 44 is provided with an avoidance groove 441 through which the balance valve core 48 penetrates.

When the pressures on the two sides of the first piston 4 are different, the liquid on the high pressure side drives the balance valve core 48 to move so as to close the balance hole 47 on the side, and then the first piston 4 is pushed to move towards the low pressure side.

When the air is required to be exhausted, liquid can be simultaneously input into the first chamber and the second chamber at two sides of the first piston 4, so that the pressures at two sides of the first piston 4 are basically the same, at the moment, the balance valve core 48 is just centered, namely, the balance holes 47 on the fixed sealing part 41 and the sliding sealing part 42 are in an open state, and the liquid can enter the first air passing gap 431 through the balance holes 47 and then enter the first air exhausting gap through the first air exhausting hole 46, so that the air exhausting of the filling liquid is realized.

In one embodiment, the balance spool 48 includes:

a link bar 481 slidably penetrating the balance holes 47 of the fixed seal portion 41 and the sliding seal portion 42 and being fit in a clearance at the penetration portion;

the two sealing heads 482 are respectively fixed at two ends of the linkage bar 481, and correspondingly close or open the balance hole 47 under the action of the lateral pressure of the two sides of the piston.

In a preferred embodiment, to ensure a sealing effect, the sealing head 482 has a spherical shape, and the opposite sides of the fixed sealing portion 41 and the sliding sealing portion 42 are respectively provided with a concave area 451 located at the outer periphery of the balance hole 47, and the sealing head 482 abuts against the concave area 451 when closing the balance hole 47.

The manner in which liquid enters the first vent gap from the first vent 46 varies somewhat depending on the particular proximal location of the second tube 12.

In an embodiment, the proximal end of the second tube member 12 is fixed to the support frame 44 in the sliding seal portion 42 of the first piston 4 after passing through the connecting sleeve 43 of the first piston 4, i.e. the second tube member 12 has blocked the first vent hole 46 on the connecting sleeve 43, and the tube wall of the second tube member 12 is provided with a suitable vent hole matching the position of the first vent hole 46.

In one embodiment, the proximal end of the second tube member 12 is secured to the first piston 4 by a fastening sleeve 122, the fastening sleeve 122 is secured to the support frame 44 in the sliding seal portion 42 of the first piston 4, i.e., both the second tube member 12 and the fastening sleeve 122 have blocked the first vent hole 46 in the connecting sleeve 43, and both the second tube member 12 and the fastening sleeve 122 are provided with a compliant vent hole matching the position of the first vent hole 46.

In one embodiment, the proximal end of the second tube 12 is secured to a support bracket 44 in the stationary seal part 41 of the first piston 4. I.e., second tube member 12 does not block first exhaust hole 46, first exhaust hole 46 may be in direct communication with the first exhaust gap.

At the second piston 9, the proximal connection of the intermediate tube 13 is similar to the way in which the vent is adapted.

Referring to fig. 36 to 37, in an embodiment of the interventional instrument delivery system of the present application, two cylinders, namely, a first cylinder 31 and a second cylinder 32 are adopted, a first piston 4 with a balance valve core 48 is installed in the first cylinder 31, and the first cylinder 31 is provided with a communication port 314 and a communication port 315; the second piston 9 with the balance valve core is installed in the second cylinder 32, and the second cylinder 32 is provided with a communication port 324 and a communication port 325.

The pipe fitting of axial relative motion includes the second pipe fitting with first piston 4 fixed connection, the intermediate pipe fitting with second piston 9 fixed connection to and the first pipe fitting of control handle fixed connection, still is connected with the protective tube that is in the second pipe fitting periphery on the control handle through fixed cover 8 in addition, has third exhaust hole 82 on the fixed cover 8.

Also arranged in the hydraulic drive circuit are a multi-way switching valve 6, a drive pump 5 with an inlet 54 and an outlet 55, and a reservoir 7 with an inlet 73 and an outlet 74. A first check valve 331 is connected to the inlet 54 of the drive pump 5; a second check valve 332 is connected to the outlet 55 of the drive pump 5. The various components are in communication via respective hydraulic lines 33.

In this embodiment, the multi-way switching valve 6 has seven interfaces, two of which are driving side interfaces 67 and are respectively communicated with the outlet and inlet of the driving pump 5 (indirectly communicated through a one-way valve and a liquid storage tank), the other five of the multi-way switching valve 6 are working side interfaces 68, the corresponding driving side interfaces 67 and working side interfaces 68 can be communicated through a plurality of flow passages 66 on a valve core inside the multi-way switching valve 6, and the multi-way switching valve can be divided into seven gears D1-D7 based on different communication relations, and each gear realizes different functions.

Specifically, each gear function is as follows:

in the gear positions D5, D6, the chambers on both sides of the piston are simultaneously in communication with the outlet 55 of the drive pump 5, i.e. liquid is simultaneously introduced, centering the balancing valve core, opening all balancing holes, allowing liquid to fill the corresponding exhaust gaps.

Referring to fig. 38, in another embodiment, only the first cylinder 31 is employed, the first piston 4 with the balance spool 48 is installed in the first cylinder 31, and the first cylinder 31 has the communication port 314 and the communication port 315.

The axially opposite moving tube comprises a second tube fixedly connected with the first piston 4 and a first tube fixedly connected with the control handle.

In this embodiment, the multi-way switching valve 6 has four interfaces, two of which are driving side interfaces and are respectively communicated with the outlet and inlet of the driving pump 5 (indirectly communicated through the one-way valve and the liquid storage tank), and the other two of the multi-way switching valve 6 are working side interfaces, and can be divided into three gears D1-D3 based on different communication relations, and each gear realizes different functions.

Specifically, each gear function is as follows:

in gear D3, the chambers on both sides of the piston are simultaneously in communication with the outlet 55 of the drive pump 5, i.e. simultaneously filled with liquid, so that the balancing valve core is centered, all balancing holes are opened, and liquid can be poured into the gap between the second pipe and the first pipe for exhausting.

Referring to fig. 39, in another embodiment, only the first cylinder 31 is employed, the first piston 4 with the balance spool 48 is installed in the first cylinder 31, and the first cylinder 31 has the communication port 314 and the communication port 315.

The control handle is also connected with a protection pipe at the periphery of the second pipe fitting through a fixing sleeve 8, and the fixing sleeve 8 is provided with a third exhaust hole 82.

In this embodiment, the multi-way switching valve 6 has five interfaces, two of which are driving side interfaces and are respectively communicated with the outlet and inlet of the driving pump 5 (indirectly communicated through the one-way valve and the liquid storage tank), and the other three of the multi-way switching valve 6 are working side interfaces, and can be divided into four gears D1-D4 based on different communication relations, and each gear realizes different functions.

Specifically, each gear function is as follows:

in gear D3, the chambers on both sides of the piston are simultaneously in communication with the outlet 55 of the drive pump 5, i.e. simultaneously filled with liquid, so that the balancing valve core is centered, opening all balancing holes, so that liquid can be poured into the exhaust gaps of the second pipe and the first pipe.

The control handle can realize the related operation of the interventional instrument at the far end by driving the relative movement of the pipe fittings, in one embodiment, the first pipe fitting 11 is provided with a mounting head 112 for connecting the interventional instrument, and the mounting head 112 is provided with a lock hole;

the distal end of the intermediate tube 13 is fixed with a lock member, which is inserted into the lock hole in a locked state, and the interventional instrument is bound on the lock member by itself or a binding wire, and the lock member is separated from the lock hole in a released state to release the interventional instrument.

The proximal end of the interventional instrument can be provided with structures such as a hook and a snare, the structure is directly wound on the lock piece through the hook and the snare, and the farthest end of the lock piece is inserted into the lock hole, so that the proximal end position of the interventional instrument can be limited, and the proximal end of the interventional instrument can be released only if the lock piece is separated from the lock hole.

In addition, a binding wire can be arranged, one part of the binding wire is connected with the proximal end of the interventional instrument in a penetrating way, and the other part of the binding wire is wound on the locking piece, so that the limiting or releasing effect can be achieved through the locking piece.

The most distal end of the first tube member 11 is a guiding head 111, an interventional device mounting position is arranged between the guiding head 111 and the mounting head 112, when an interventional device is input, the interventional device is radially compressed and sleeved on the first tube member 11, the distal end of the interventional device is arranged on the guiding head 111, the proximal end of the interventional device is connected to the mounting head 112 and is further limited by a lock, the distal end of the second tube member 12 is provided with an enlarged loading section for wrapping the interventional device, the second tube member 12 is retracted (sliding towards the proximal end side) during release, the interventional device is gradually exposed and radially expanded, but due to the fact that the proximal end of the interventional device is locked on the mounting head 112, even if the interventional device is completely exposed to the second tube member 12, the proximal end of the interventional device is not released, after confirming the position of the interventional device, the intermediate tube member 13 is retracted again, so that the lock is separated from the lock hole, and after that the proximal end of the interventional device can be completely released, the second tube member 12 can be pushed forward to recover, reload and adjust the position when the interventional device is not in place.

In one embodiment, the locking member is rod-shaped, a connecting seat is fixed inside the middle pipe fitting 13, the proximal end of the locking member is inserted and fixed on the connecting seat, and the distal end of the locking member is matched with the locking hole through axial movement along with the middle pipe fitting 13.

In order to equalize the distribution of the locking forces, in a preferred embodiment the locking element is a plurality of straight bars arranged side by side. Each straight rod extends along the axial direction of the middle pipe fitting 13, and a plurality of straight rods are uniformly distributed along the circumferential direction of the middle pipe fitting 13, for example, two to four straight rods.

The proximal end of the interventional instrument is generally provided with a connecting lug, and a positioning clamping groove corresponding to the connecting lug can be arranged on the periphery of the mounting head 112, so that the position of the connecting lug is further maintained, and unnecessary axial sliding or relative rotation between the connecting lug and the mounting head 112 is prevented.

When the binding wire is combined for use, in order to facilitate the threading of the binding wire, a threading hole can be formed in the mounting head 112, the threading direction of the threading hole can be along the axial direction or the radial direction of the mounting head 112, the mounting head 112 can be provided with a hole, the binding wire can be realized by using an auxiliary part with a hole, and the auxiliary part is fixedly connected with the mounting head.

The distal end of the connecting lug 101 is provided with an annular connecting part, the binding wire passes through the annular connecting part and the threading hole, a wire loop is reserved at the end part, and the locking piece passes through the wire loop and then enters the insertion lock hole, so that the wire loop cannot be separated from the locking piece, namely the connecting lug 101 is bound on the mounting head 112.

The locking piece is separated from the locking hole in the unlocking state, the wire loop is released from the restriction, and after the connecting lug 101 moves further, the binding wire can be pulled out of the annular connecting part to release the interventional instrument.

In another embodiment, a positioning protrusion corresponding to the connection lug is provided on the outer periphery of the mounting head 112, so as to further maintain the position of the connection lug, and prevent unnecessary axial sliding or relative rotation between the connection lug and the mounting head 112. In addition, the threading holes radially extend and are just arranged on the positioning protrusions, the two positioning protrusions are symmetrical, and the threading holes penetrate through the two positioning protrusions along the axial direction of the positioning protrusions.

In another embodiment, a positioning protrusion corresponding to the connection lug is provided on the outer periphery of the mounting head 112, so as to further maintain the position of the connection lug, and prevent unnecessary axial sliding or relative rotation between the connection lug and the mounting head 112.

In addition, a tubular auxiliary member is fixedly embedded in the outer periphery of the mounting head 112, and a threading hole is formed in the auxiliary member and extends along the axial direction of the mounting head 112.

The binding wire can be wound in various modes, but the binding wire is generally at least connected with the connecting lug and the locking piece through the threading hole, and the connecting lug is released by the binding wire or the connecting lug and the binding wire are released together after the locking piece is separated from the locking hole.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description. When technical features of different embodiments are embodied in the same drawing, the drawing can be regarded as a combination of the embodiments concerned also being disclosed at the same time.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application.

Claims

1. The interventional instrument conveying system with the protective tube comprises a plurality of tube pieces and a control handle, wherein the tube pieces are coaxially arranged from inside to outside, the control handle drives the tube pieces to move relatively, the distal ends of the tube pieces are used for mutually matching operation of the interventional instrument, and the proximal ends of the tube pieces are connected to the control handle;

2. The interventional instrument delivery system with protective tube of claim 1, wherein the hydraulic chamber is a first hydraulic chamber, a fixed sleeve is mounted on the control handle, the proximal end of the protective tube is in sealed abutment with the distal end of the fixed sleeve, and the proximal end of the second tube member extends further into the first hydraulic chamber after passing out of the fixed sleeve via the protective tube.

3. The interventional instrument delivery system with protective tube of claim 2, wherein the fixed sleeve has a through hole into which the proximal end of the protective tube extends and is fixedly connected in a sealed manner to the wall of the hole, and wherein the fixed sleeve is fixedly connected to the control handle.

4. The interventional instrument delivery system with protective tube according to claim 2, wherein the outer periphery of the fixed sleeve is provided with an annular positioning groove, and the control handle comprises a first half shell and a second half shell which are mutually buckled, and edges of the two half shells are clamped with the positioning groove.

5. A catheter delivery system according to claim 3, wherein the control handle is fixedly mounted with a first cylinder, the first cylinder being internally provided with a first hydraulic chamber, the first cylinder being provided with a distal sealing plug, the proximal end of the stationary sheath being provided with a receiving chamber communicating with the through bore, a portion of the distal sealing plug extending into the receiving chamber, the portion being sealingly filled between the stationary sheath and the outer wall of the second tube.

6. The interventional instrument delivery system with protective tube of claim 2, wherein the proximal end of the retaining sleeve is in sliding sealing engagement with the outer wall of the second tube member, the radial gap between the protective tube and the second tube member is a third vent gap, and a third vent hole in communication with the third vent gap is provided in the sidewall of the retaining sleeve.

7. The protected tube interventional instrument delivery system of claim 6, wherein a sliding seal mating location of the proximal end of the retaining sleeve and the outer wall of the second tube member is used as a sealing point, and wherein the axial location of the third vent is located between the proximal end of the protective tube and the sealing point.

8. The protected tube interventional instrument delivery system of claim 6, wherein the third vent is connected to a hydraulic drive circuit.

9. The protected tube interventional instrument delivery system of claim 8, wherein the hydraulic drive circuit comprises:

a hydraulic line for providing a fluid passage;

10. The protected tube interventional instrument delivery system of any of claims 1-9, wherein an intermediate tube is further coupled between the first tube and the second tube.