CN211155922U

CN211155922U - Biopsy needle with vacuum adjustment

Info

Publication number: CN211155922U
Application number: CN201921773124.8U
Authority: CN
Inventors: 郭现立
Original assignee: Shenzhen Chengchuan Medical Co ltd
Current assignee: Shenzhen Chengchuan Medical Co ltd
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2020-08-04
Anticipated expiration: 2029-10-22

Abstract

The utility model provides a pair of biopsy needle with vacuum regulation, it has been seted up on the connecting pipe and has switched on atmospheric inlet channel, establish a mobilizable vacuum seal chamber subassembly in the connecting pipe, this vacuum seal chamber subassembly communicates with the cutter tube subassembly of living body tissue excision, when this vacuum seal chamber subassembly removes the connecting pipe inlet channel position, inlet channel switches on, when the vacuum seal chamber subassembly removes different positions, inlet channel switch on the area is different, the air input is then different, thereby realize adjusting vacuum and air current size in vacuum seal chamber subassembly and the cutter tube subassembly, the different adsorption affinity that adsorbs the cutter tube subassembly with living body tissue is different, the air current is different then carry the external conveying power difference with the tissue of excision. Therefore, in the vacuum-assisted biopsy, more sufficient tissue samples can be obtained in the process of cutting the knife tube assembly, and tissues can be smoothly conveyed out of the body in the process of conveying the tissues, so that the operation efficiency and effectiveness are improved.

Description

Biopsy needle with vacuum adjustment

Technical Field

The utility model belongs to the technical field of medical instrument, especially, relate to a biopsy needle with vacuum is adjusted.

Background

The biopsy needle comprises an outer cutter tube and an inner cutter tube, wherein the inner cutter tube is sleeved in the outer cutter tube and axially reciprocates and rotates to cut living tissues, a notch is formed in the peripheral surface of the front end of the outer cutter tube, the living tissues to be cut are adsorbed into the outer cutter tube through the notch by a vacuum adsorption mechanism and then are cut off from a human body by the inner cutter tube, and the cut off living tissues are adsorbed to a specified position by the vacuum adsorption mechanism through the inner cutter tube.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art not enough, provide a biopsy needle with vacuum is adjusted, it has promoted cutting efficiency, has reduced the operation risk.

The utility model discloses a realize like this, a biopsy needle with vacuum regulation, including a connecting pipe, set up at least one inlet channel who switches on with external atmosphere on the connecting pipe, be equipped with a vacuum seal chamber subassembly in the connecting pipe, vacuum seal chamber subassembly with sealed sliding fit between the connecting pipe, inlet channel is located the stroke range of vacuum seal chamber subassembly, vacuum seal chamber subassembly and a sword pipe assembly intercommunication that is used for the excision of living body tissue, vacuum seal chamber subassembly is in reciprocating motion is in order to control in the connecting pipe inlet channel conduction area crescent or reduce, and then control the air input of sword pipe subassembly increases gradually or reduces so that vacuum in the sword pipe subassembly reduces gradually or increases and the air current crescent or reduces.

Preferably, the air inlet passage is axially disposed along the connection pipe.

Specifically, the inlet of the intake passage is large and the outlet is small.

Preferably, the number of the air inlet channels is four, and the four air inlet channels are sequentially arranged at intervals along the axial direction of the connecting pipe.

Specifically, the vacuum sealing cavity assembly comprises a hollow pipe body which is slidably arranged in the connecting pipe, first sealing elements which are used for sealing between the pipe body and the connecting pipe are respectively sleeved at two ends of the outer peripheral surface of the pipe body, the inner peripheral surface of each first sealing element is in sealing clamping fit with the pipe body, and the outer peripheral surface of each first sealing element is in sealing sliding fit with the connecting pipe.

Specifically, an annular groove is circumferentially formed in the middle of the outer peripheral surface of the pipe body, a plurality of air inlet holes which are located in the annular groove and penetrate through the wall thickness of the pipe body are radially formed in the pipe body, the inlet of each air inlet hole is large, the outlet of each air inlet hole is small, and the annular groove and the air inlet holes are communicated with each other to form a sealed channel.

Specifically, the two ends of the tube body are connected, the knife tube assembly comprises an outer knife tube with a knife edge and an inner knife tube which is slidably arranged in the outer knife tube and used for cutting living tissues in the knife edge, an air passage for supplying air body fluid is formed between the outer knife tube and the inner knife tube, the air passage is communicated with the sealing channel, one end of the tube body is sleeved on the periphery of the outer knife tube and is in sealing sliding fit with the outer knife tube, the other end of the tube body is sleeved on the periphery of the inner knife tube extending out of the outer knife tube and is in sealing sliding fit with the inner knife tube, and one end of the inner knife tube extending out of the outer knife tube is communicated with a vacuum absorber.

Furthermore, a second sealing ring and a third sealing ring are respectively arranged at two ends of the inner peripheral surface of the pipe body, the second sealing ring is in sealing sliding fit with the outer peripheral surface of the outer cutter pipe, and the third sealing ring is in sealing sliding fit with the inner cutter pipe.

Further, a first positioning piece used for limiting the second sealing ring and a second positioning piece used for limiting the third sealing ring are installed at two ends of the outer peripheral surface of the pipe body respectively, the first positioning piece is sleeved on the outer periphery of the outer cutter pipe, and the second positioning piece is sleeved on the outer periphery of the inner cutter pipe.

Furthermore, a first elastic body and a second elastic body are respectively clamped on the first positioning piece and the second positioning piece, the first elastic body is sleeved on the periphery of the outer cutter tube, and the second elastic body is sleeved on the periphery of the inner cutter tube.

Specifically, body one end switches on the other end and seals, the cutting tool pipe subassembly includes that an outer cutting tool pipe that has the edge of a knife and the cunning is located be used for the cutting in the outer cutting tool pipe the intraoral internal cutter pipe of living body tissue of sword, stretch out in the outer cutting tool pipe interior cutting tool pipe one end and a vacuum adsorber intercommunication still include with an air duct of outer cutting tool pipe peripheral face fixed connection, the fixed cover of one end inner peripheral surface that the body switches on is located the air duct outer peripheral face, sealed passageway one end with inlet channel intercommunication, the sealed passageway other end with air duct one end intercommunication, the air duct other end with the tip intercommunication that the outer cutting tool pipe is used for accomodating living body tissue.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a biopsy needle with vacuum adjustment provided by an embodiment of the present invention.

Fig. 2 is an enlarged view at a in fig. 1.

Fig. 3 is a schematic view of a vacuum sealed cavity assembly in a biopsy needle with vacuum adjustment provided by an embodiment of the present invention.

Fig. 4 is an exploded view of a vacuum sealed chamber assembly in a biopsy needle with vacuum adjustment according to an embodiment of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

In the description of the present invention, it should be understood that the terms "front end", "rear end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", "upwardly", "downwardly" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

The first embodiment is as follows:

as shown in fig. 1 to 4, a biopsy needle with vacuum regulation includes a connection tube 1, the connection tube 1 is provided with at least one air inlet channel 11 communicated with the outside atmosphere, in this embodiment, a vacuum sealed cavity assembly 2 is arranged in the air inlet channel 11 along the connection tube 1, two ends of the vacuum sealed cavity assembly 2 are in sealed sliding fit with the connection tube 1, the air inlet channel 11 is located in the stroke range of the vacuum sealed cavity assembly 2, the vacuum sealed cavity assembly 2 is communicated with a knife tube assembly 3 for cutting off living tissue, the vacuum sealed cavity assembly 2 reciprocates in the connection tube 1 to control the communication area of the air inlet channel 11 to increase or decrease, and further control the air inflow of the knife tube assembly 3 to increase or decrease the vacuum degree in the knife tube assembly 3 and increase or decrease the air flow gradually;

in the embodiment, when the vacuum seal cavity assembly 2 moves upwards in the connecting pipe 1, the conduction area of the air inlet channel 11 can be controlled to be gradually increased, and then the air inflow of the knife pipe assembly 3 is controlled to be gradually increased, so that the vacuum degree in the knife pipe assembly 3 is gradually reduced and the air flow is gradually increased;

when the vacuum sealing cavity assembly 2 moves downwards in the connecting pipe 1, the conduction area of the air inlet channel 11 can be controlled to be gradually reduced, and then the air inflow of the knife pipe assembly 3 is controlled to be gradually reduced so that the vacuum degree in the knife pipe assembly 3 is gradually increased and the air flow is gradually reduced.

Preferably, the air inlet channels 11 are axially arranged along the connecting pipe 1, and the inlets of the air inlet channels 11 are larger and the outlets of the air inlet channels 11 are smaller, so as to control the air inflow in the air inlet channels 11.

Specifically, vacuum seal chamber subassembly 2 includes that one is slided and is located in connecting pipe 1 and hollow body 21, and body 21 outer peripheral face both ends overlap respectively and are equipped with one and be used for the first sealing member 22 of sealed effect between body 21 and connecting pipe 1, and sealed joint cooperation between each first sealing member 22 inner peripheral face and the body 21, sealed sliding fit between each first sealing member 22 outer peripheral face and the connecting pipe 1.

Specifically, an annular groove 23 is circumferentially formed in the middle of the outer peripheral surface of the pipe body 21, a plurality of air inlets 24 which are located in the annular groove 23 and penetrate through the wall thickness of the pipe body 21 are radially formed in the pipe body 21, the inlets of the air inlets 24 are large, the outlets of the air inlets are small, the air inflow is controlled to be within a proper range, and the annular groove 23 and the air inlets 24 are communicated with each other to form a sealed channel 25.

Specifically, two ends of the tube body 21 are connected, the knife tube assembly 3 includes an outer knife tube 31 having a knife edge 311 and an inner knife tube 32 slidably disposed in the outer knife tube 31 for cutting living tissue in the knife edge 311, an air passage (not shown) for air fluid is formed between the outer knife tube 31 and the inner knife tube 32, the air passage is communicated with the sealing channel 25, one end of the tube body 21 is sleeved on the periphery of the outer knife tube 31 and is in sealing sliding fit therewith, the other end of the tube body 21 is sleeved on the periphery of the inner knife tube 32 extending out of the outer knife tube 31 and is in sealing sliding fit with the inner knife tube 32, and one end of the inner knife tube 32 extending out of the outer knife tube 31 is communicated with a vacuum absorber (not shown);

firstly, the living tissue at the knife edge 311 in the outer knife tube 1 is absorbed by the vacuum absorber through the inner knife tube 32, and simultaneously the living tissue in the outer knife tube 1 is rotationally cut by the driving device (not shown) driving the inner knife tube 32 to move, at this time, the living tissue and the air channel in the sealing channel 25 are in a vacuum state, when the inner knife tube 32 rotationally moves in the outer knife tube 31, the vacuum sealing component 2 moves along with the inner knife tube 32, when the sealing channel 25 of the vacuum sealing component 2 moves to the position corresponding to the air inlet channel 11, the conducting area between the air inlet channel 11 and the sealing channel 25 gradually increases along with the movement of the inner knife tube 32 (at this time, the living tissue cut by the inner knife tube 32 also gradually increases), the vacuum degree in the air channel communicated with the sealing channel 25 gradually decreases, the exchange gas for the vacuum absorption mechanism gradually increases, the air flow in the air channel increases, and the conveying force for conveying the cut tissue to the outside of the body is enhanced, meanwhile, the suction force generated by the vacuum suction device also plays a role of pulling the living tissue in the inner cutter tube 32, so that the inner cutter tube 32 can cut the living tissue conveniently, and therefore, the cut living tissue is gradually sucked into the inner cutter tube 32 until the living tissue is completely cut by the inner cutter tube 32, and the suction force generated by the vacuum suction device is quickly sucked out of the body.

Further, a second sealing ring 26 and a third sealing ring 27 are respectively arranged at two ends of the inner circumferential surface of the tube body 21, the second sealing ring 26 is in sealing sliding fit with the outer circumferential surface of the outer cutter tube 31, and the third sealing ring 27 is in sealing sliding fit with the inner cutter tube 32.

Further, a first positioning element 28 and a second positioning element 29 are respectively installed at two ends of the outer circumferential surface of the pipe body 21, the first positioning element 28 is sleeved on the outer circumference of the outer knife pipe 31, the second positioning element 29 is sleeved on the outer circumference of the inner knife pipe 32, in this embodiment, hooks 200 are respectively installed on the outer circumferential surfaces of the first positioning element 28 and the second positioning element 29, the hooks 200 are clamped on concave positions 201 at two ends of the pipe body 21, a plurality of bosses 202 for abutting against and limiting the second sealing ring 26 and the third sealing ring 27 are respectively installed on the inner circumferential surfaces of the first positioning element 28 and the second positioning element 29, in this embodiment, the bosses 202 are preferably arranged in four and symmetrical pairs, a clamping groove 203 is formed between two adjacent bosses 202, and the clamping grooves 203 on the first positioning element 28 and the second positioning element 29 are four.

Furthermore, a first elastic body 210 and a second elastic body 211 are respectively clamped on the first positioning element 28 and the second positioning element 29, the first elastic body 210 is sleeved on the outer periphery of the outer knife pipe 31, and the second elastic body 211 is sleeved on the outer periphery of the inner knife pipe 32; first elastomer 210 is equipped with the card and locates the bulge 204 in the draw-in groove 203 that corresponds, bulge 204 on first elastomer 210 and the second elastomer 211 is four and blocks respectively and locate four draw-in grooves 203 that correspond in this embodiment, adopt this kind of structure to reduce the appearance volume of vacuum seal chamber subassembly 2, the inner space of connecting pipe 1 has been practiced thrift, first elastomer 210 with set firmly in the 1 lateral wall butt of connecting pipe of outer sword pipe 31, first elastomer 210 plays the effect of interior sword pipe 32 of restriction and the 2 strokes of vacuum seal chamber subassembly promptly, play absorbing effect simultaneously again, the phenomenon of vacuum seal chamber subassembly 2 because collision connecting pipe 1 lateral wall damages has been avoided.

The second embodiment has the same principle as the first embodiment 1, and has similar structure, and the difference is that the position of the air passage is different.

The one end of body 21 switches on the other end and seals, cutter pipe subassembly 3 includes that an outer cutter pipe 31 that has edge of a knife 311 and the smooth interior cutter pipe 32 that is used for cutting the living body tissue in the edge of a knife 311 of locating in outer cutter pipe 31, stretch out interior cutter pipe 32 one end and a vacuum adsorption ware (not shown) intercommunication in outer cutter pipe 31, still include with outer cutter pipe 31 outer peripheral face fixed connection's an air duct (not shown), the air duct outer peripheral face is located to the fixed cover of one end inner peripheral face that body 21 switches on, sealed channel 25 one end and inlet channel intercommunication 11, the sealed channel 11 other end communicates with air duct one end, the air duct other end communicates with the tip that outer cutter pipe 31 is used for accomodating the living body tissue.

The utility model provides a biopsy needle with vacuum regulation, it sets up the inlet channel 11 that switches on atmosphere on connecting pipe 1, establish a mobilizable vacuum seal chamber subassembly 2 in the connecting pipe 1, this vacuum seal chamber subassembly 2 communicates with the cutter tube subassembly 3 that the living body tissue amputated, when this vacuum seal chamber subassembly 2 removes connecting pipe 1 inlet channel 11 position, inlet channel 11 switches on, when vacuum seal chamber subassembly 2 removes different positions, inlet channel 11 conduction area is different, the air input is different, thereby realize adjusting vacuum and air current size in vacuum seal chamber subassembly 2 and the cutter tube subassembly 3, the adsorption affinity that adsorbs the living body tissue to cutter tube subassembly 3 is different for different vacuum, the air current is different and the conveyor power that carries the excised living body tissue outside the body is different (the air input in the inlet channel 11 increases gradually or reduces, the air flow in the vacuum seal cavity assembly 2 and the knife tube assembly 3 is gradually increased or decreased, the vacuum degrees in the vacuum seal cavity assembly 2 and the knife tube assembly 3 are gradually decreased or increased, and when the vacuum degrees in the air passages of the vacuum seal cavity assembly 2 and the knife tube assembly 3 are gradually decreased, the air flow in the air passages is increased, and the conveying force for conveying the cut living tissues to the outside of the body is enhanced). Therefore, in the vacuum-assisted biopsy, the delivery force can be enhanced during the excision of the knife tube component 3, more sufficient tissue samples can be obtained, and the tissue can be delivered to the outside of the body more smoothly during the tissue delivery process, so that the operation efficiency and effectiveness are improved.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims

1. The biopsy needle with the vacuum regulation function is characterized by comprising a connecting pipe, wherein at least one air inlet channel communicated with the outside atmosphere is formed in the connecting pipe, a vacuum sealing cavity assembly is arranged in the connecting pipe, the vacuum sealing cavity assembly is in sealing sliding fit with the connecting pipe, the air inlet channel is located in the stroke range of the vacuum sealing cavity assembly, the vacuum sealing cavity assembly is communicated with a knife pipe assembly used for cutting living tissues, the vacuum sealing cavity assembly reciprocates in the connecting pipe to control the conduction area of the air inlet channel to be gradually increased or decreased, and then the air inflow of the knife pipe assembly is controlled to be gradually increased or decreased so that the vacuum degree in the knife pipe assembly is gradually decreased or increased and the air flow is gradually increased or decreased.

2. The biopsy needle with vacuum adjustment of claim 1, wherein the air inlet channel is axially disposed along the connecting tube, and the air inlet channel has a larger inlet and a smaller outlet.

3. The biopsy needle with vacuum adjustment according to claim 2, wherein the number of the air inlet channels is four, and the four air inlet channels are sequentially spaced along the axial direction of the connecting tube.

4. The biopsy needle with vacuum adjustment function according to claim 1, wherein the vacuum sealed cavity assembly comprises a hollow tube body slidably disposed in the connecting tube, first sealing members are respectively sleeved on two ends of an outer peripheral surface of the tube body for sealing between the tube body and the connecting tube, an inner peripheral surface of each first sealing member is in sealing snap fit with the tube body, and an outer peripheral surface of each first sealing member is in sealing sliding fit with the connecting tube.

5. The biopsy needle with vacuum regulation as claimed in claim 4, wherein an annular groove is circumferentially opened at a middle portion of an outer peripheral surface of the tube body, a plurality of air inlets are radially opened in the annular groove and penetrate through a wall thickness of the tube body, an inlet of the air inlet is larger than an outlet of the air inlet, and the annular groove and the air inlets are communicated with each other to form a sealed channel.

6. The biopsy needle with vacuum adjustment function according to claim 5, wherein the tube body has two open ends, the knife tube assembly comprises an outer knife tube with a knife edge and an inner knife tube slidably disposed in the outer knife tube for cutting living tissue in the knife edge, an air channel for air and fluid is formed between the outer knife tube and the inner knife tube, the air channel is communicated with the sealing channel, one end of the tube body is sleeved on the outer circumference of the outer knife tube and is in sealing sliding fit with the outer knife tube, the other end of the tube body is sleeved on the outer circumference of the inner knife tube extending out of the outer knife tube and is in sealing sliding fit with the inner knife tube, and one end of the inner knife tube extending out of the outer knife tube is communicated with a vacuum absorber.

7. The biopsy needle with vacuum adjustment function according to claim 6, wherein a second sealing ring and a third sealing ring are respectively disposed at two ends of the inner circumferential surface of the tube body, the second sealing ring is in sealing sliding fit with the outer circumferential surface of the outer knife tube, and the third sealing ring is in sealing sliding fit with the inner knife tube.

8. The biopsy needle with vacuum adjustment function according to claim 7, wherein a first positioning element for positioning the second sealing ring and a second positioning element for positioning the third sealing ring are respectively installed at two ends of the outer peripheral surface of the tube body, the first positioning element is sleeved on the outer periphery of the outer knife tube, and the second positioning element is sleeved on the outer periphery of the inner knife tube.

9. The biopsy needle with vacuum adjustment function according to claim 8, wherein a first elastic body and a second elastic body are respectively clamped on the first positioning member and the second positioning member, the first elastic body is sleeved on the outer circumference of the outer knife tube, and the second elastic body is sleeved on the outer circumference of the inner knife tube.

10. The biopsy needle with vacuum regulation according to claim 5, wherein one end of the tube body is connected to the other end thereof for sealing, the knife tube assembly comprises an outer knife tube with a knife edge and an inner knife tube slidably disposed in the outer knife tube for cutting the living tissue in the knife edge, one end of the inner knife tube extending out of the outer knife tube is connected to a vacuum absorber, and further comprises an air duct fixedly connected to the outer peripheral surface of the outer knife tube, the inner peripheral surface of the tube body connected to one end thereof is fixedly secured to the outer peripheral surface of the air duct, one end of the sealing channel is connected to the air inlet channel, the other end of the sealing channel is connected to one end of the air duct, and the other end of the air duct is connected to the end of the outer knife tube for receiving the living tissue.