CN210871751U - Puncture device - Google Patents

Abstract

The utility model provides a puncture device, which comprises a puncture needle, a conduit, an adsorption head and a puncture driving component, wherein one end of the conduit is connected with the adsorption head, the other end is connected with the puncture driving component, one end of the puncture needle penetrates through the conduit and extends to the adsorption head, the other end is connected with the puncture driving component, the puncture driving component comprises a barrel, a push rod piece and a positioning unit, the edge of one end part of the barrel is provided with an outwards extending supporting part, the puncture needle extends into the barrel from the other end of the barrel, the push rod piece can movably extend into the barrel and is connected with the puncture needle, the positioning unit can be movably arranged along the axial direction of the push rod piece and can be fixed on the push rod piece, an operator pushes the push rod piece, the push rod piece moves in the barrel, when the positioning unit is matched with the supporting part on the barrel, the push rod piece stops moving in the barrel, and improve the puncture efficiency.

Description

Puncture device

Technical Field

The utility model relates to the field of medical equipment, especially, relate to a piercing depth.

Background

Puncturing devices are commonly used as instruments for organ puncturing, injection of drugs or biological materials, and aspiration of body fluids. The puncture device generally comprises a puncture needle and a driving mechanism, wherein the driving mechanism is connected with the puncture needle and drives the puncture needle to puncture.

In actual operation, when a human body is punctured by the puncturing device, the puncturing device has a high requirement on controllability of the puncturing depth, and the puncturing depth is difficult to grasp due to manual operation, so that the puncturing device has the problems of low efficiency and high error rate.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a lancing device that is easy to adjust and operate.

In order to solve the technical problem, the utility model discloses a following technical scheme:

a puncture device comprises a puncture needle, a catheter, an adsorption head and a puncture driving assembly, wherein one end of the catheter is connected with the adsorption head, the other end of the catheter is connected with the puncture driving assembly, one end of the puncture needle penetrates through the catheter to reach the adsorption head, the other end of the puncture needle is connected with the puncture driving assembly, and the puncture driving assembly drives the puncture needle to puncture; puncture drive assembly includes barrel, push rod spare and positioning unit, a barrel tip edge is equipped with the portion of holding of outside extension, the pjncture needle is followed the barrel other end stretches into in the barrel, push rod spare is followed the barrel has the one end that supports the portion of holding and can move and stretch into in the barrel and with the pjncture needle is connected, positioning unit follows push rod spare axial movable sets up and can fix to on the push rod spare, positioning unit with support the portion of holding contact cooperation, in order to fix a position the pjncture needle.

The utility model has the advantages of, the preset position at the push rod piece is fixed to the positioning unit, and the operator promotes the push rod piece, and the push rod piece removes in the barrel, and when supporting on positioning unit and barrel was mutually supported, the push rod piece stopped the removal in the barrel to the puncture depth of assurance pjncture needle, the rate of accuracy of assurance puncture, and improvement puncture efficiency.

In a feasible scheme, the push rod piece is provided with a plurality of matching parts arranged along the axial direction of the push rod piece, and the positioning unit is matched and fixed with the matching parts. The matching part fixes the positioning unit on the push rod piece, and the positioning unit and the push rod piece are prevented from moving relatively when an operator continuously pushes the push rod piece.

In a possible solution, the matching portion is a groove structure or a hole structure, and the positioning unit has a positioning portion that is matched with the groove structure or the hole structure. The positioning part extends into the groove structure or the hole structure so as to conveniently fix the positioning unit on the push rod piece.

In a feasible scheme, the positioning unit is provided with an adjusting hole, the push rod piece penetrates through the adjusting hole, and the positioning unit moves along the axial direction of the push rod piece through the adjusting hole. When the positioning unit moves along the axial direction of the push rod piece, the adjusting hole can avoid the separation of the positioning unit and the push rod piece.

In a feasible scheme, the positioning unit is further provided with a positioning hole communicated with the adjusting hole, and when the push rod piece extends into the positioning hole from the adjusting hole, the positioning part is connected with the matching part. The locating hole is convenient to be connected with the locating part and the matching part.

In a feasible scheme, the push rod piece is provided with a connecting hole and a reaming hole communicated with the connecting hole, and the puncture needle is fixedly arranged in the connecting hole and the reaming hole in a penetrating way. The puncture needle can conveniently penetrate into the connecting hole through the reaming hole, the reaming hole is filled with the bonding material, and the bonding material is used for fixing the puncture needle in the connecting hole and the reaming hole.

In a feasible scheme, a limiting anti-falling unit is further arranged between the barrel and the push rod piece and is used for preventing the push rod piece from being separated from the barrel. When the push rod piece moves in the barrel body, the limiting anti-falling unit can prevent the push rod piece and the barrel body from being separated, and an operator can operate the push rod piece conveniently.

The puncture needle comprises a body, wherein the body is of a hollow tubular structure, the body is provided with a front end and a rear end which are arranged in a back-to-back manner, the tube wall of the body is provided with a plurality of notches, the notches are respectively positioned at different positions in the extending direction of the body, and the notches face at least two different directions;

the utility model has the advantages of, be provided with the incision of a plurality of not equidirectionals on the pjncture needle, make the pjncture needle can be crooked to a plurality of directions, be convenient for puncture in-process by-pass blood vessel and tissue, and a plurality of incisions distribute in different positions department on the body extending direction for the pjncture needle has better rigidity, is convenient for to the puncture of live body tissue.

In one possible embodiment, at least four of the cutouts are oriented differently from one another. Through setting up 4 incisions that are towards different directions, the pjncture needle is convenient for to 4 directions are crooked, can be better bypass blood vessel or other tissues.

In one possible embodiment, the slits facing each other are arranged at intervals in series along the axial direction of the body. The incisions facing different directions are continuously arranged, so that the section of the puncture needle has better bending capability in multiple directions, and the puncture needle can be conveniently and selectively bent.

In one possible solution, the incisions are arranged spirally in the axial direction of the body. Through the spiral arrangement, the puncture needle is more regular when being bent, and the bending angle and the bending part of the puncture needle are convenient to control.

In one possible embodiment, the angle between the slit orientations of adjacent slits is 90 degrees. Because the adjacent cuts are perpendicular to each other, the operator can control the bending direction more easily.

In one possible embodiment, the distance between adjacent slits gradually increases or gradually decreases from the front end to the rear end. When the distance between the rear end incisions is larger than that of the front end, the front end of the puncture needle is easier to bend, and the rigidity of the rear end is larger, so that the puncture direction of the puncture needle is convenient to control, and the puncture needle is suitable for the condition that the living tissue is softer or; when the front end incision distance is larger than the rear end, the rear end of the puncture needle is easier to bend, and the rigidity of the front end is larger, so that the puncture needle is suitable for the condition that the living tissue is relatively compact and is not easy to puncture.

In a feasible scheme, the plane of the incision forms an angle α with the extending direction of the body, the angle is not less than 60 degrees and not more than α degrees and not more than 90 degrees, the inclination angle of the incision is limited, so that the single incision is not excessively distributed on the body, a fish scale structure appears when the body is bent, and secondary damage is caused to living tissues in the puncturing process.

In a possible solution, after the notch is projected onto the cross section of the body, the length of the notch along the outer wall of the body is greater than or equal to half of the perimeter of the cross section of the body. So set up for the incision has comparatively suitable degree of depth, the bending of the body of being convenient for.

In one possible solution, the surface of the body is provided with a membrane covering the cut. The membrane is arranged to isolate the puncture needle body from the inside and the outside.

In a feasible scheme, the adsorption head comprises a body, the body is a hollow shell, an opening is formed in one side of the shell, which is adsorbed by an adsorbed object, at least one adsorption cavity and at least one operation cavity are formed in the body, the operation cavity and the adsorption cavity are arranged at intervals and are opened towards the direction of the adsorbed object, at least one adsorption channel and at least one operation channel are formed in the body, and one end of the adsorption channel is communicated with the adsorption cavity; one end of the operation channel is communicated with the operation cavity.

The advantage of above-mentioned scheme lies in: the adsorption cavity is adsorbed on the surface of a living body, so that the adsorption head can be adsorbed on the surface of the living body tissue, the endoscope or the puncture needle is inserted into the operation cavity, the endoscope or the puncture needle and the operation cavity are relatively stable, and then the living body is operated.

In a possible scheme, a first adsorption cavity and a second adsorption cavity are formed in the body, the first adsorption cavity is communicated with the second adsorption cavity, and the first adsorption cavity and/or the second adsorption cavity is communicated with the adsorption channel.

Through setting up two absorption chambeies, make the absorption head can be more firm adsorb on the living body surface, the going on of the operation of being convenient for. And the first adsorption cavity and the second adsorption cavity are communicated with each other, so that the air pressure in the first adsorption cavity is the same as that in the second adsorption cavity, and the first adsorption cavity and the second adsorption cavity have the same adsorption force during adsorption.

In a possible scheme, the first adsorption cavity and the second adsorption cavity are communicated through a communication structure, and the communication structure can be a channel, a through hole and the like.

In a possible solution, the communication structure is a communication channel opened in the body. The first adsorption cavity and the second adsorption cavity can be connected through the communication channel, so that a certain distance can be kept between the first adsorption cavity and the second adsorption cavity, and the adsorption force of the first adsorption cavity and the second adsorption cavity can be still ensured after the first adsorption cavity and the second adsorption cavity are adsorbed on the surface of a living body.

In a feasible scheme, the communication structure is a connecting pipe, the connecting pipe is communicated with the first adsorption cavity and the second adsorption cavity, and the connecting pipe is detachable and convenient to replace.

In a feasible scheme, the communicating structure further comprises a containing channel arranged on the body, and the connecting pipe is arranged in the containing channel and is communicated with the first adsorption cavity and the second adsorption cavity. Through set up in this body and accept the passageway, and with the connecting pipe set up in accept in the passageway for the whole of body is comparatively level and smooth, is convenient for stretch into the internal absorption operation that carries on of living.

In a possible solution, the connecting pipe has a front end and a rear end, the front end and the rear end of the connecting pipe are both open, the rear end opening communicates with the first adsorption cavity, and the front end opening communicates with the second adsorption cavity.

In one possible embodiment, the front end is provided with a first extension extending axially along the connecting tube. So set up for certain distance has between connecting pipe and the body, avoids the circulation of air of connecting pipe to receive the retardation.

In one possible embodiment, the first extension is an arc-shaped structure. The arc-shaped structure has better support performance, can not obstruct the air circulation in the connecting pipe, and is convenient to produce and manufacture.

In one possible embodiment, the rear end is provided with a second extension extending axially along the connecting tube.

So set up for certain distance has between connecting pipe and the body, avoids the circulation of air of connecting pipe to receive the retardation.

In one possible embodiment, the second extension is an arc-shaped structure. The arc-shaped structure has better support performance, can not obstruct the air circulation in the connecting pipe, and is convenient to produce and manufacture.

In one possible embodiment, the connecting tube is arranged on a side wall of the operating chamber. Thereby preventing the operation cavity from being shielded and facilitating the use of surgical instruments.

In a possible solution, two connecting pipes are arranged between the first adsorption chamber and the second adsorption chamber, and the connecting pipes are respectively located on two opposite side walls of the operation chamber. Therefore, the air flow between the first adsorption cavity and the second adsorption cavity is larger, and the connecting pipe cannot occupy the space in the operation cavity, so that the use of surgical instruments is prevented from being influenced.

In a possible scheme, a first adsorption cavity and a second adsorption cavity are formed in the body, and the first adsorption cavity and the second adsorption cavity are respectively communicated with the two adsorption channels. So set up for different suction device can be connected respectively to first absorption chamber and second absorption chamber, has the flexibility of better regulation.

In a feasible scheme, the side surface of the body opposite to the opening side is an arc-shaped surface, so that the adsorption head can conveniently extend into the living body for adsorption.

In a feasible scheme, a first operation channel and a second operation channel are formed in the body, and the first operation channel and the second operation channel are communicated with the operation cavity. The first operation channel and the second operation channel respectively extend into different surgical instruments, so that the surgical instruments cannot be interfered with each other.

In one possible solution, the cross-sectional area of the first operating channel is greater than the cross-sectional area of the second operating channel. Facilitating the insertion of a larger diameter surgical instrument in the first operative corridor.

In one possible embodiment, the second operation channel is arranged obliquely with respect to the adsorbate surface. The inclined arrangement facilitates the surgical instrument to extend into the living body, for example, facilitates the puncture of the puncture needle.

Compared with the prior art, be provided with absorption chamber and operation chamber in the absorption head, adsorb on the biopsy surface as the absorption head to the surgical instruments that make to be located the operation intracavity can be static for the biopsy surface, thereby has improved the stability and the success rate of operation, has reduced the probability that causes the secondary injury. And through setting up a plurality of absorption chambeies, make the absorption head can be more stable adsorb on the living body surface, the operation of being convenient for.

Drawings

The following drawings are only for the purpose of enabling those skilled in the art to better understand the technical solution of the present invention, and are not intended to limit the present invention, and other drawings can be obtained by those skilled in the art according to the technical solution of the present invention.

Fig. 1 is a schematic structural view of a puncture device according to an embodiment of the present invention;

fig. 2 is a perspective view of the puncture needle provided by the utility model;

fig. 3 is an enlarged view of the present invention according to fig. 2 at a;

fig. 4 is a front view of the puncture needle provided by the utility model;

fig. 5 is a cross-sectional view in the direction B-B of fig. 4 according to the present invention;

FIG. 6 is a schematic structural view of the lancing drive assembly of FIG. 1;

FIG. 7 is an exploded view of the lancing drive assembly of FIG. 6;

FIG. 8 is a schematic view of the cartridge shown in FIG. 7;

fig. 9 is a schematic view of the first position-limiting member shown in fig. 7;

FIG. 10 is a schematic view of the positioning unit shown in FIG. 7;

FIG. 11 is a schematic view of the pusher member of FIG. 7;

FIG. 12 is a schematic view of the pusher member of FIG. 11;

FIG. 13 is a schematic view of the structure of the adsorbent head shown in FIG. 1;

FIG. 14 is a right side view of the head structure of FIG. 13;

FIG. 15 is a cross-sectional view taken along line A-A of FIG. 13;

FIG. 16 is a cross-sectional view taken along line B-B of FIG. 13;

fig. 17 is a perspective view of the connection tube of fig. 16.

Description of reference numerals:

100. a puncture device; 10. puncturing needle; 11. a body; 11a, front end; 11b, a rear end; 111. a guide portion; 12. cutting; 20. a puncture drive assembly; 21. a barrel; 211. a groove; 212. an anti-slip portion; 213. a holding portion; 22. a pusher member; 221. a fitting portion; 222. reaming; 223. connecting holes; 23. a positioning unit; 231. a positioning part; 232. positioning holes; 233. an adjustment hole; 24. a damping member; 25. a limiting anti-drop unit; 251. a first limit piece; 252. a second limiting member; 253. a protrusion; 26. an identification unit; 27. a luer fitting; 44. an operation channel; 30. a conduit; 31. a flexible section; 5. an adsorption head; 50. a body; 51. an adsorption chamber; 511. a first adsorption chamber; 512. a second adsorption chamber; 513. a connecting pipe; 5131. a first extension section; 5132. a second extension section; 52. an operating chamber; 53. an operation channel; 531. a first operation channel; 532. a second operation channel; 54. an adsorption channel.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

For a better description and illustration of embodiments of the application, reference may be made to one or more of the drawings, but additional details or examples for describing the drawings should not be construed as limiting the scope of any of the inventive concepts of the present application, the presently described embodiments, or the preferred versions.

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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 12, the present invention provides a puncturing device 100, which puncturing device 100 is used for medical puncturing or injection of drugs, biological materials or aspiration of body fluids. Here, the puncturing device 100 is used to puncture the heart (not shown) and inject a non-contractile substance such as a self-solidifying, biocompatible hydrogel (not shown) into the left ventricular wall of the heart.

Specifically, the puncture device 100 comprises a puncture needle 10, a catheter 30, an adsorption head 5 and a puncture driving assembly 20, wherein one end of the catheter 30 is connected with the adsorption head 5, the other end of the catheter 30 is connected with the puncture driving assembly 20, one end of the puncture needle 10 penetrates through the catheter 30 and extends to the adsorption head 5, the other end of the puncture needle is connected with the puncture driving assembly 20, and the puncture driving assembly 20 drives the puncture needle 10 to puncture; the penetration depth of the needle 10 can be precisely controlled by the penetration drive assembly 20.

It can be understood that the suction head 5 can be attached to the surface of the living tissue by suction of the suction device, and the endoscope or the puncture needle 10 is inserted into the suction head 5 through the guide tube 30, so that the endoscope or the puncture needle 10 is relatively stable, when the operation is performed on the living body, since the suction head 5 is attached to the surface of the living body and moves synchronously with the surface of the living body, the endoscope or the puncture needle 10 can be kept in a stable state relative to the surface of the living body, and further, the operation of the living body by the endoscope or the puncture needle 10 can be more controllable, which facilitates the smooth operation.

Preferably, a flexible section 31 is provided on the conduit 30, and the conduit 30 is bent by the flexible section 31. Preferably, the radius at which the flexible section 31 can bend can be adjusted, i.e., the puncture path of the catheter 30 can be adjusted (the path of the catheter 30 can be adjusted arbitrarily), so that the catheter 30 has the advantages of stronger maneuverability, better bending resistance, stronger ability to bypass blood vessels, bones and nerve tissues, reduced risk of puncturing organs and more precise puncture to a target point. And when the adsorption head 5 displaces along with the living body, the flexible section 31 can play a role in connection, and the stability of other parts of the support tube is kept.

The flexible segment 31 is provided to facilitate bending of the conduit 30, and may be provided in various manners, for example, a plurality of flexible segments 31 may be provided, the flexible segments may be provided at intervals, and the conduit 30 may have a flexible structure as a whole.

Specifically, the puncture needle 10 includes a body 11, the body 11 is a hollow tube, and the cross section of the body 11 may be circular, oval, square, or the like. In the present embodiment, the body 11 has a circular cross-section.

The puncture needle 10 may be made of stainless steel, nitinol or medical polymer material to improve the structural strength of the puncture needle 10, thereby facilitating the puncture of the puncture needle 10. The medical grade polymer material includes, but is not limited to, polyurethane, polypropylene, polyethylene, polycarbonate, ABS resin, modified nylon, etc.

Further, the body 11 has a front end 11a and a rear end 11b which are oppositely arranged. It is to be explained that the front end 11a is the end of the puncture needle 10 away from the operator, i.e. the end used for puncturing, and the rear end 11b is the end of the puncture needle 10 close to the operator. Of course, the definitions of the "front end 11 a" and the "rear end 11 b" are intended to more clearly illustrate the body 11 and are not intended to limit the present invention.

The front end 11a of the body 11 is provided with a guide part 111, and the guide part 111 is used for guiding in the puncturing process, so that the puncture needle 10 can smoothly puncture the human cortex and puncture to a predetermined target point.

Preferably, the guide portion 111 is an inclined surface, that is, an end surface of the front end 11a of the body 11 is cut so that the end surface of the front end 11a forms a needle-like structure having a guiding function.

Referring to fig. 3, a plurality of notches 12 are formed on a tube wall of the body 11, the notches 12 are respectively located at different positions in an extending direction of the body 11, and the notches 12 face at least two different directions.

A ray of a segment of a line connecting two ends of the notch 12, which is perpendicular to a plane in which the notch is located and faces one side of the notch opening, is defined as a direction line of the notch 12, and the direction of the ray is the direction of the direction line and is the notch direction;

the ray projected on the cross section of the body by the direction line of the notch 12 is defined as the direction line of the notch, and the direction of the ray is the direction of the direction line, namely the direction of the notch.

It will be appreciated that the provision of the cut 12 in the body 11, i.e. the structural rigidity of the body 11 is modified, enables the body 11 to be more easily bent at its cut 12. The notches 12 are arranged at different positions in the extending direction of the body 11, so that a plurality of notches 12 with different orientations are not arranged in the same radial section of the body 11, the body 11 has better rigidity, and transitional bending does not occur outside the body during puncture to influence the puncture direction.

Preferably, at least four of the cuts 12 are oriented differently from each other. It will be appreciated that by providing 4 differently oriented notches 12, the needle 10 is facilitated to flex in 4 directions, thereby making the orientation of the needle 10 more easily adjustable for better bypass of blood vessels or other tissue.

Preferably, the slits 12 facing each other are arranged at intervals in succession along the axial direction of the body 11. It will be appreciated that the different notches 12 will be oriented in series so that the body 11 has the capability of flexing in multiple directions to facilitate selective flexing of the needle 10.

Preferably, the slits 12 are arranged spirally along the axial direction of the body 11. By the spiral arrangement, the puncture needle 10 is more regular when bending, and the bending angle and the bending part are convenient to control.

It should be explained that the cuts 12 are arranged in a spiral manner, but the angles between the planes of the different cuts 12 and the extending direction of the body 11 may be the same or may be set differently according to the requirement, the spiral arrangement is that the middle portions of the adjacent cuts 12 are roughly in a spiral line shape after being connected along the surface of the body, but the arrangement manner among the different cuts 12 is different. It is worth mentioning that when the incisions 12 are arranged in a uniform spiral line, the puncture needle body can present a smooth arc shape when the puncture needle 10 is operated to be bent, which is convenient for operation.

Preferably, the angle between the notch orientations of adjacent notches 12 is 90 degrees. It should be explained that the operator can more easily control the direction of bending of the needle 10 due to the perpendicular orientation of adjacent notches 12.

Further, the spacing distance between the adjacent cutouts 12 gradually increases or gradually decreases from the front end 11a to the rear end 11 b.

It can be understood that when the distance between the rear end incisions 12 is larger than that of the front end, the front end of the puncture needle 10 is more easily bent, and the rigidity of the rear end is larger, so that the puncture direction of the puncture needle 10 can be conveniently controlled, and the puncture needle is suitable for the condition that the living tissue is softer; when the distance between the front end incisions 12 is larger than that of the rear end, the rear end of the puncture needle 10 is easier to bend, and the rigidity of the front end is larger, so that the puncture needle is suitable for the condition that the living tissue is relatively compact and is not easy to puncture.

Preferably, the plane of the incision 12 forms an angle α with the extending direction of the body 11, and the angle α is not less than 60 degrees and not more than 90 degrees, it can be understood that the inclination angle of the incision 12 is limited, so that the single incision 12 is not excessively distributed on the body 11, and the body 11 is not bent to have a fish scale structure, which causes secondary damage to living tissues during the puncturing process.

With reference to fig. 3 and 5, after the notch 12 is projected onto the cross section of the body, the length of the notch 12 along the outer wall of the body 11 is greater than or equal to half of the perimeter of the cross section of the body 11. So set up for the incision has comparatively suitable degree of depth, is convenient for the bending of body 11. It should be noted that the depth of the incision affects the bending ability and the structural strength of the body 11, and when the depth of the incision is smaller, the bending ability of the body 11 is poorer, but the rigidity of the body is higher, so that the puncture is facilitated.

Preferably, the surface of the body 11 is provided with a film covering the notch 12. The membrane is preferably made of nylon, and is arranged to isolate the inside and the outside of the puncture needle body 11, and can prevent the fluid substance from leaking out of the incision when the fluid substance needs to be injected into the living body through the puncture needle.

As shown in fig. 6 and 7, the puncture driving assembly 20 includes a barrel 21, a push rod 22 and a positioning unit 23, an edge of one end of the barrel 21 is provided with an abutting portion 213 extending outward, the push rod 22 movably extends into the barrel 21 to drive the puncture needle 10 to puncture, and the positioning unit 23 can axially move along the push rod 22 and can be fixed to the push rod 22, and is in contact fit with the abutting portion 213.

It will be appreciated that the barrel 21 has a slide (not shown) formed therein for engaging the pusher member 22, the pusher member 22 being slidable within the slide. According to the puncture depth of the puncture needle 10, the position of the positioning unit 23 fixed on the push rod piece 22 is calculated, then the push rod piece 22 is pushed, the push rod piece 22 moves along the axial direction of the cylinder 21 and drives the puncture needle 10, when the positioning unit 23 is in contact fit with the abutting part 213 on the cylinder 21, the push rod piece 22 stops moving in the sliding groove of the cylinder 21, and therefore the puncture needle 10 is driven to puncture to the preset depth, and the purpose of accurately controlling the puncture depth of the puncture needle 10 is achieved.

Wherein the cylinder 21 is substantially cylindrical. Of course, in other embodiments, the cylinder 21 may have other shapes, such as an oval shape.

The abutting portion 213 is integrally provided with the cylinder 21, so that the cylinder 21 and the abutting portion 213 can be easily processed and manufactured.

Preferably, two abutting portions 213 are provided, and are respectively provided at both sides of the cylinder 21. The cylinder 21 and the abutting portion 213 may be made of stainless steel, nitinol or medical polymer material, so as to improve the structural strength of the cylinder 21 and the abutting portion 213. Medical grade high molecular materials include, but are not limited to, polyurethane, polypropylene, polyethylene, polycarbonate, ABS resin, modified nylon, and the like.

Furthermore, a luer connector 27 is arranged on the push rod piece 22, and one end of the puncture needle 10 is positioned in the luer connector 27. The luer connector 27 is used to connect to an external suction device.

Further, as shown in fig. 8, the outer wall of the cylinder 21 is provided with a non-slip portion 212. The anti-slip portion 212 increases the friction between the hand of the operator and the cylinder 21 when the operator grips the cylinder 21, thereby preventing the hand of the operator from slipping from the cylinder 21.

In the present embodiment, the nonslip portion 212 is a nonslip protrusion. Of course, in other embodiments, the anti-slip part 212 may be an anti-slip pattern, a rubber sheet, or the like, as long as the structure can play a role of anti-slip.

Further, as shown in fig. 6 and 11, the push rod member 22 is provided with a plurality of engaging portions 221 arranged along the axial direction of the push rod member 22, and the positioning unit 23 is engaged and fixed with the engaging portions 221.

It can be understood that the engaging portion 221 can fix the positioning unit 23 on the pushing rod 22, and when the positioning unit 23 on the pushing rod 22 abuts against the abutting portion 213 on the cylinder 21, the positioning unit 23 is prevented from being separated from the pushing rod 22.

In the present embodiment, the engaging portion 221 has a groove structure, and the positioning unit 23 has a positioning portion 231 engaged with the groove structure.

It will be appreciated that when the positioning unit 23 reaches a predetermined position on the pusher member 22, the positioning portion 231 can be snapped into the engaging portion 221 to prevent relative movement of the positioning unit 23 with respect to the pusher member, so that the positioning unit 23 is fixed to the pusher member 22 with a simpler structure and more convenient operation.

Preferably, the pusher member 22 has a first side (not shown) and a second side (not shown) opposite each other, and the engaging portion 221 is disposed on the first side of the pusher member 22.

Of course, the second side surface may be provided with a matching portion 221, and the positioning portion 231 on the positioning unit 23 can be connected with the matching portion 221 on the first side surface or the second side surface.

Preferably, the engaging portion 221 of the second side surface may be offset from the engaging portion 221 of the first side surface, so that the positioning unit 23 is fixed on the pusher member 22 at a more precise position.

Further, the matching portions 221 on the first side surface and the matching portions 221 on the second side surface are arranged in a one-to-one correspondence manner, and the positioning portions 231 can be connected with the two corresponding matching portions 221 on the first side surface and the second side surface at the same time.

It can be understood that, when the positioning unit 23 is fixed on the pusher member 22, the positioning portions 231 on the positioning unit 23 need to be simultaneously connected with the matching portions 221 on both sides of the pusher member 22, so that the positioning unit 23 is more firmly fixed on the pusher member 22, and the positioning unit 23 is prevented from falling off the pusher member 22.

Of course, in other embodiments, the engaging portion 221 is a hole structure, and the positioning unit 23 has a positioning portion 231 engaged with the hole structure.

Further, as shown in fig. 10, an adjusting hole 233 is formed in the positioning unit 23, the push rod member 22 is inserted into the adjusting hole 233, and the positioning unit 23 moves along the axial direction of the push rod member 22 through the adjusting hole 233.

It can be understood that when the positioning unit 23 moves along the push rod member 22, the push rod member 22 is first inserted into the adjusting hole 233 of the positioning unit 23, the positioning unit 23 moves along the push rod member 22 through the adjusting hole 233, and when the positioning unit 23 moves to a predetermined position of the push rod member 22, the engaging portion 221 of the push rod member 22 fixes the positioning unit 23.

Wherein the minimum inner diameter of the adjustment hole 233 is larger than the maximum outer diameter of the push rod member 22 to enable the positioning unit 23 to move on the push rod member 22.

Further, as shown in fig. 10, the positioning unit 23 is further provided with a positioning hole 232 communicating with the adjusting hole 233, and when the push rod 22 extends into the positioning hole 232 from the adjusting hole 233, the positioning portion 231 is connected to the engaging portion 221.

It is understood that when the positioning unit 23 is moved to a predetermined position of the pusher member 22, the operator pushes the pusher member 22 such that the pusher member 22 extends from the adjustment hole 233 into the positioning hole 232, and when the pusher member 22 enters the positioning hole 232, the positioning portion 231 is connected to the engaging portion 221 to fix the positioning unit 23 to the pusher member 22.

Specifically, the positioning portion 231 is a side wall of the positioning hole 232, and when the push rod 22 enters the positioning hole 232, the positioning portion 231 is clamped in the clamping groove to clamp the positioning unit 23 on the push rod 22.

Further, as shown in fig. 12, the push rod member 22 is provided with a connecting hole 223 and a counterbore 222 communicated with the connecting hole 223, and the puncture needle 10 is inserted and fixed in the connecting hole 223 and the counterbore 222.

It will be appreciated that counterbore 222 may guide needle 10 into coupling aperture 223 and that needle 10 may be secured within coupling aperture 223 and counterbore 222 by an adhesive (which may be glue). Meanwhile, the counterbore 222 is provided, so that the adhesive attachment area can be increased when the counterbore 222 is filled with the adhesive, thereby making the fixation of the puncture needle 10 more firm.

Further, as shown in fig. 7, a damping member 24 is disposed between the cylinder 21 and the push rod member 22, and the damping member 24 is configured to increase a friction force between the push rod member 22 and an inner wall of the cylinder 21.

It will be appreciated that the damping member 24 increases the damping coefficient between the push rod member 22 and the barrel 21, which can act to secure the push rod member 22 within the barrel 21. When the push rod member 22 is pushed, the friction between the push rod member 22 and the barrel 21 needs to be overcome to prevent an external object from touching the push rod member 22, so that the push rod member 22 slides in the barrel 21 to change the puncture depth of the puncture needle 10.

One side of the damping member 24 is mounted on the side wall of the push rod member 22, and the other side of the damping member abuts against the inner wall of the cylinder 21.

Of course, in other embodiments, the damping member 24 is mounted on one side to the inner wall of the cylinder 21 and on the other side to abut against the inner wall of the push rod member 22.

Preferably, the damping member 24 is disposed in a ring shape, an inner edge of the damping member 24 is mounted on the push rod member 22, and an outer edge of the damping member 24 abuts against an inner wall of the cylinder 21.

It can be understood that the push rod member 22 is provided with an annular groove for installing the damping member 24, and the periphery of the push rod member 22 is in contact with the inner wall of the cylinder 21 through the damping member 24, so that the circumferential friction of the push rod member 22 is the same, and the problem of non-uniform acting force of the push rod member 22 on the damping member 24 caused by the fact that the push rod member 22 moves in the cylinder 21 is avoided.

Of course, in other embodiments, the inner edge of the damping member 24 abuts against the push rod member 22, and the outer edge of the damping member 24 is mounted on the inner wall of the cylinder 21.

Further, as shown in fig. 7, a limiting and anti-falling unit 25 is further disposed between the cylinder 21 and the push rod 22, and the limiting and anti-falling unit 25 is configured to prevent the push rod 22 from falling off the cylinder 21. When the push rod member 22 moves in the cylinder 21, the limiting anti-falling unit 25 can prevent the push rod member 22 from separating from the cylinder 21, so that an operator can operate the push rod member 22 conveniently.

Preferably, the limiting and anti-falling unit 25 includes a first limiting member 251 and a second limiting member 252, the first limiting member 251 is disposed on an inner wall of the cylinder 21, the second limiting member 252 is disposed on an outer wall of the push rod 22, and the first limiting member 251 and the second limiting member 252 cooperate to prevent the push rod 22 from falling off the cylinder 21.

It can be understood that the second limiting member 252 is disposed at one end of the push rod member 22 disposed in the cylinder 21, and when the push rod member 22 moves in the cylinder 21, when the second limiting member 252 on the push rod member 22 moves to the position of the first limiting member 251, the first limiting member 251 can block the axial movement of the second limiting member 252 in the cylinder 21, so as to prevent the push rod member 22 from disengaging from the cylinder 21.

Further, as shown in fig. 9, a groove 211 is formed on an inner wall of the cylinder 21, and a protrusion 253 that is engaged with the groove 211 is formed on an outer side wall of the first limiting member 251.

It can be understood that, when the first limiting member 251 is installed, the first limiting member 251 is first pushed to move the first limiting member 251 along the axial direction of the cylinder 21 until the protrusion 253 on the first limiting member 251 is engaged with the groove 211 on the inner wall of the cylinder 21, and the first limiting member 251 stops moving in the cylinder 21, so as to fix the first limiting member 251 in the cylinder 21.

In this embodiment, the first stopper 251 has a cylindrical shape. Preferably, the axis of the first limiting member 251 is substantially coincident with the axis of the cylinder 21. Of course, in other embodiments, the axis of the first stopper 251 and the axis of the cylindrical body 21 may not coincide with each other.

Of course, in other embodiments, the inner wall of the cylinder 21 is provided with a protrusion 253, and the outer side wall of the first limiting member 251 is provided with a groove 211 matched with the protrusion 253.

Preferably, the second retaining member 252 is integrally formed with the push rod member 22. The push rod 22 and the second limiting member 252 are integrally formed for processing, so that the push rod 22 and the second limiting member 252 can be conveniently processed.

Further, as shown in fig. 11, an identification unit 26 is disposed on the pusher 22, and the identification unit 26 is configured to identify a position of the positioning unit 23 on the pusher 22.

It can be understood that the positioning unit 23 is clamped at a predetermined position of the push rod 22 according to the identification unit 26 of the push rod 22, and meanwhile, the movement distance of the push rod 22 in the barrel 21 is judged through the identification unit 26, so that the puncture depth of the puncture needle 10 is grasped, the puncture accuracy is ensured, and the puncture efficiency is improved.

In the present embodiment, the marking unit 26 may be a scale state mark. Of course, in other embodiments, the identification unit 26 may be an identification other than a scale as long as the identification can measure the moving distance of the push rod member 22 in the axial direction of the cylinder 21.

Preferably, the identification unit 26 includes a plurality of identification parts distributed along the length direction of the pusher member 22, and the positioning unit 23 doubles as an indication part and cooperates with the identification unit 26.

It will be appreciated that the positioning unit 23 is fixed to the plunger member 22 more precisely at a position where the number of marks is greater along the length of the plunger member 22, so that the depth of penetration of the puncture needle 10 is more precisely, and the marks can be replaced by the positioning unit 23.

Further, as shown in fig. 13 to 17, the utility model provides an adsorption head 5, this adsorption head 5 includes a body 50, the body 50 is a hollow casing, the casing is provided with an opening, the direction of the opening is toward the adsorbate adsorption setting, the body 50 is provided with at least one adsorption cavity 51 and at least one operation cavity 52 therein, the operation cavity 52 and the adsorption cavity 51 are arranged at intervals, and the operation cavity 52 and the adsorption cavity 51 are both disposed toward the adsorbate direction opening, the body 50 is provided with at least one adsorption channel 54 and at least one operation channel 53, one end of the adsorption channel 54 is communicated with the adsorption cavity 51; one end of the operation passage 53 communicates with the operation chamber 52.

It should be explained that the absorption cavity 51 can be absorbed on the surface of the living body by connecting the suction device, so that the absorption head 5 can be absorbed on the surface of the living body tissue, the endoscope or the puncture needle extends into the operation cavity 52 through the operation channel 53, so that the endoscope or the puncture needle is relatively stable with the operation cavity 52, when the operation is performed on the living body, since the absorption head 50 is absorbed on the surface of the living body and moves synchronously with the surface of the living body, and the operation cavity 52 and the absorption cavity 51 are relatively fixed, the operation instrument can keep a stable state relative to the surface of the living body, so that the operation of the living body by the operation instrument has higher controllability, thereby facilitating the smooth operation.

Preferably, the number of the adsorption cavities 51 is two, and the two adsorption cavities 51 are a first adsorption cavity 511 and a second adsorption cavity 512 respectively, the first adsorption cavity 511 and the second adsorption cavity 512 are communicated with each other, and the first adsorption cavity 511 and/or the second adsorption cavity 512 are communicated with the adsorption channel 54 respectively. Of course, in other embodiments, the number of the adsorption cavities 51 may be other, for example, 3 or 4, and the specific number may be set according to actual requirements.

It can be understood that, by providing two adsorption cavities 51, the adsorption head 50 can be more firmly adsorbed on the surface of the living body, thereby facilitating the operation; secondly, the first adsorption cavity 511 is communicated with the second adsorption cavity 512, so that the air pressure in the first adsorption cavity 511 is the same as that in the second adsorption cavity 512, and the pressure in the adsorption cavity 51 is the same during adsorption, thereby facilitating control of the adsorption force of the adsorption cavity 51 on the surface of the living body and avoiding damage to the surface of the living body due to excessive adsorption strength.

Preferably, the first adsorption chamber 511 and the second adsorption chamber 512 are communicated through a communication structure.

More preferably, the communication structure may be a channel, a through hole, or the like.

In an embodiment, the communication structure is a communication channel opened in the body 50, so that the first adsorption chamber 511 and the second adsorption chamber 512 are communicated through the communication channel, and a certain distance can be kept between the first adsorption chamber 511 and the second adsorption chamber 512, so that the arrangement positions of the first adsorption chamber 511 and the second adsorption chamber 52 are more flexible, and the adsorption of the adsorption head 5 is facilitated.

In another embodiment, the communicating structure is a connecting pipe 513, the connecting pipe 513 connects the first adsorption chamber 511 and the second adsorption chamber 512, and the connecting pipe 513 is a separate component and is detachable. It can be understood that the first adsorption chamber 511 and the second adsorption chamber 512 are connected by the connection pipe 513, so that the structure is simple, and the replacement, maintenance, processing and installation are more convenient.

Preferably, in this embodiment, the body 50 has a receiving channel (not shown), and the connecting pipe 513 is disposed in the receiving channel and communicates the first adsorption chamber 511 and the second adsorption chamber 512. It can be understood that, by providing the receiving channel in the body 50 and disposing the connecting pipe 513 in the receiving channel, the whole body of the body 50 is relatively flat, and is convenient to extend into a living body for performing an adsorption operation.

As shown in fig. 17, the connecting pipe 513 has a front end and a rear end that are opposite to each other, the front end and the rear end of the connecting pipe 513 are both open, the opening of the rear end is communicated with the first adsorption chamber 511, and the opening of the front end is communicated with the second adsorption chamber 512.

Further, the front end is provided with a first extension 5131 extending axially along the connection pipe 513.

Preferably, the first extension segment 5131 has an arc-shaped structure.

Further, the rear end is provided with a second extension 5132 extending axially along the connection pipe 513.

Preferably, the second extension segment 5132 has an arc-shaped structure.

It can be understood that, by arranging the first extension 5131 and the second extension 5132, the opening of the connecting pipe 513 is not blocked by other structures in the extension, so that when the connecting pipe 513 is communicated with the two adsorption chambers 51, the air can flow more smoothly; secondly, the first extension section 5131 and the second extension section 5132 are set to be arc-shaped structures, and are extended from the wall of the connecting pipe 513 on one side far away from the adsorption cavity 51, so that the extension sections do not block the air circulation between the connecting pipe 513 and the adsorption cavity 51, and the extension sections are convenient to manufacture.

Preferably, the connecting tube 513 is disposed on a side wall of the operation cavity 52, so that when the surgical instrument extends into the operation cavity 52 for performing the surgical operation, the surgical instrument is not shielded by the connecting tube 513, thereby facilitating the use of the surgical instrument.

Preferably, two connecting pipes 513 are disposed between the first adsorption chamber 511 and the second adsorption chamber 512, and the connecting pipes 513 are respectively located on two opposite sidewalls of the operation chamber 52. It can be understood that two connection pipes 513 are provided to make the air flow rate between the first adsorption chamber 511 and the second adsorption chamber 512 larger and the adsorption effect better. Of course, the number of the connecting pipes 513 may be more, for example, 3, 4, etc.

In another embodiment, the body 50 has a first adsorption chamber 511 and a second adsorption chamber 512, two adsorption passages 54 are provided in the body 50, and the first adsorption chamber 511 and the second adsorption chamber 512 are respectively communicated with one adsorption passage 54. So set up for first adsorption chamber 511 and second adsorption chamber 512 can connect different suction apparatus respectively, have the flexibility of better regulation adsorption mode.

Preferably, the side of the body 50 opposite to the opening is an arc-shaped surface. It is understood that the body 50 is provided with an arc-shaped side to facilitate the insertion of the suction head 5 into the living body.

Preferably, the body 50 is provided with a first operation channel 531 and a second operation channel 532, and both the first operation channel 531 and the second operation channel 532 are communicated with the operation cavity 52. The first operation channel 531 and the second operation channel 532 are respectively used for extending different surgical instruments, so that the surgical instruments cannot interfere with each other in use. Of course, in other embodiments, more operation channels 53 may be opened on the body 50, and the number of the operation channels 53 is not limited, and may be set according to actual needs.

Preferably, the cross-sectional area of the first operating channel 531 is greater than the cross-sectional area of the second operating channel 532. It will be appreciated that the provision of a first operative corridor 531 having a cross-sectional area that is sized differently from the cross-sectional area of the second operative corridor 532 may facilitate insertion of a larger diameter surgical instrument into the first operative corridor 531.

Preferably, the second operation channel 532 is disposed obliquely with respect to the adsorbate surface.

It should be noted that the inclined arrangement of the operation channel 53 can facilitate the surgical instrument to extend into the living body, for example, facilitate the puncture of the puncture needle.

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.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (14)

1. A lancing device, characterized by: the puncture device comprises a puncture needle, a catheter, an adsorption head and a puncture driving assembly, wherein one end of the catheter is connected with the adsorption head, the other end of the catheter is connected with the puncture driving assembly, one end of the puncture needle penetrates through the catheter and extends to the adsorption head, the other end of the puncture needle is connected with the puncture driving assembly, and the puncture driving assembly drives the puncture needle to puncture;

puncture drive assembly includes barrel, push rod spare and positioning unit, a barrel tip edge is equipped with the portion of holding of outside extension, the pjncture needle is followed the barrel other end stretches into in the barrel, push rod spare is followed the barrel has the one end that supports the portion of holding and can move and stretch into in the barrel and with the pjncture needle is connected, positioning unit follows push rod spare axial movable sets up and can fix to on the push rod spare, positioning unit with support the portion of holding contact cooperation, in order to fix a position the pjncture needle.

2. The lancing device of claim 1, wherein: the push rod piece is provided with a plurality of matching parts arranged along the axial direction of the push rod piece, and the positioning unit is matched and fixed with the matching parts.

3. The lancing device of claim 2, wherein: the matching part is of a groove structure or a hole structure, and the positioning unit is provided with a positioning part matched with the groove structure or the hole structure.

4. The lancing device of claim 3, wherein: the positioning unit is provided with an adjusting hole, the push rod piece penetrates through the adjusting hole, and the positioning unit moves along the axial direction of the push rod piece through the adjusting hole.

5. The lancing device of claim 4, wherein: the positioning unit is also provided with a positioning hole communicated with the adjusting hole, and the positioning part is connected with the matching part when the push rod piece extends into the positioning hole from the adjusting hole.

6. The lancing device of claim 5, wherein: the push rod piece is provided with a connecting hole and a reaming hole communicated with the connecting hole, and the puncture needle is fixedly arranged in the connecting hole and the reaming hole in a penetrating manner.

7. The lancing device of claim 1, wherein: the barrel with still be equipped with spacing anticreep unit between the push rod spare, spacing anticreep unit is used for preventing the push rod spare breaks away from the barrel.

8. The lancing device of any one of claims 1-7, wherein: the puncture needle comprises a body, the body is of a hollow tubular structure, the body is provided with a front end and a rear end which are arranged in a back-to-back mode, a plurality of notches are arranged on the tube wall of the body and are respectively located at different positions in the extending direction of the body, and the notches face at least two different directions.

9. The lancing device of claim 8, wherein: at least four of the cutouts are oriented differently from each other.

10. The lancing device of claim 9, wherein: the notches facing different directions are arranged at intervals along the axial direction of the body.

11. The lancing device of claim 9, wherein: the incisions are arranged spirally along the axial direction of the body.

12. The lancing device of claim 11, wherein: the angle between the notch orientations of adjacent notches is 90 degrees.

13. The lancing device of claim 8, wherein the spacing distance between adjacent notches increases or decreases gradually from the front end to the rear end, the plane of the notch is at an angle α with respect to the extension direction of the body, the angle α is 60 degrees or less and 90 degrees or less, and the length of the notch along the outer wall of the body after the notch is projected on the cross section of the body is greater than or equal to half of the circumference of the cross section of the body.

14. The lancing device of claim 8, wherein: the surface of the body is provided with a film covering the notch.

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