CN212698975U

CN212698975U - Coaxial trocar for fixing focus during percutaneous lung puncture biopsy

Info

Publication number: CN212698975U
Application number: CN202021889781.1U
Authority: CN
Inventors: 沈梦君; 王茵; 毕珂; 陈宏伟; 张怡; 丛阳; 朱惠铭; 徐黎莎; 汤春红; 袁静
Original assignee: Shanghai Pulmonary Hospital
Current assignee: Shanghai Pulmonary Hospital
Priority date: 2020-06-23
Filing date: 2020-09-02
Publication date: 2021-03-16
Anticipated expiration: 2030-09-02
Also published as: CN112022227A

Abstract

The utility model relates to the technical field of medical instruments, in particular to a coaxial trocar for fixing focus during percutaneous lung puncture biopsy, which comprises a tube sleeve, a needle core and a fixing device; the needle core can move in and out along the length direction of the sleeve in the sleeve, and the fixing device is arranged in the sleeve and can synchronously move along the movement direction of the needle core; the fixing device comprises a base and a fixing needle connected with the base, and the sleeve is provided with a needle hole for the fixing needle to pass through and a sliding groove for providing moving guide for the fixing needle; the fixing devices are at least symmetrically arranged in one group; the inner wall of the sleeve is provided with a limiting block for limiting the movement of the base when the needle core moves; the utility model discloses make under the supersound guide percutaneous puncture's location more stable, effectively improved the success rate of puncture, effectively avoid the emergence of complication simultaneously.

Description

Coaxial trocar for fixing focus during percutaneous lung puncture biopsy

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a coaxial trocar of fixed focus during percutaneous lung aspiration biopsy.

Background

Percutaneous lung puncture under ultrasonic guidance has been widely applied to medical work, but for lower lung and smaller focus, the biopsy puncture needle may slip even if inserted into the focus due to large mobility, which causes difficulty in positioning of percutaneous puncture under ultrasonic guidance, easily causes puncture failure, and increases complications.

SUMMERY OF THE UTILITY MODEL

Objects of the invention

In order to solve the technical problem existing in the background technology, the utility model provides a coaxial trocar for fixing focus during percutaneous lung puncture biopsy.

(II) technical scheme

In order to solve the problems, the utility model provides a coaxial trocar for fixing focus during percutaneous lung puncture biopsy, which comprises a tube sleeve, a needle core and a fixing device;

the needle core can move in and out along the length direction of the sleeve in the sleeve, and the fixing device is arranged in the sleeve and can synchronously move along the movement direction of the needle core;

the fixing device comprises a base and a fixing needle connected with the base, and the sleeve is provided with a needle hole for the fixing needle to pass through and a sliding groove for providing moving guide for the fixing needle; the fixing devices are at least symmetrically arranged in one group;

the sleeve pipe inner wall is equipped with the stopper for when the nook closing member made the motion, it is spacing to remove the base.

As a technical scheme of the utility model, the base that the symmetry set up adopts the magnetic path with magnetism, be equipped with the magnetism district opposite with base magnetism on the nook closing member.

As a technical scheme of the utility model, be located in the cover intraductal stopper one side is provided with the packing ring, the internal diameter and the nook closing member external diameter looks adaptation of packing ring.

As a technical scheme of the utility model, the packing ring can with stopper integrated into one piece.

As a further technical scheme of the utility model, be equipped with guide block and locating piece on the nook closing member, sleeve tip inner wall is equipped with and supplies guide way a, guide way B, the guide way C that the guide block removed, guide way a, guide way B, guide way C connect gradually, be equipped with on the base can with the locating piece carries out the bayonet socket of block, and with spout swing joint's connecting rod, the tip of connecting rod is equipped with the sliding part, the embedding of sliding part sets up in the spout, and along with the removal of base and synchronous motion in the spout.

Preferably, the sliding part and the connecting rod are combined to form a T-shaped structure or an L-shaped structure, and the sliding structure of the sliding groove has a shape corresponding to the T-shaped structure or the L-shaped structure.

Preferably, the positioning block includes, but is not limited to, a clamping portion and a pressing portion, the clamping portion may be embedded in the clamping opening, and the pressing portion is pressed against the upper surface of the base in a state that the clamping portion is embedded in the clamping opening.

As another technical scheme of the utility model, be equipped with on the nook closing member and promote the piece the nook closing member is under the motion state of advancing, promote the piece and promote base and nook closing member synchronous motion, be equipped with on the base with spout swing joint's connecting rod, the tip of connecting rod is equipped with the sliding part, the sliding part embedding sets up in the spout, and along with the removal of base and synchronous motion in the spout, be connected through elastic mechanism between the tip of sliding part and spout.

Preferably, the elastic mechanism is a spring or a spring sheet.

As a technical scheme of the utility model, elastic connection between fixed needle and the base for make fixed needle be the elastic compression state when moving along spout length direction, be natural state under base and stopper contact state.

The above technical scheme of the utility model has following profitable technological effect:

the utility model discloses make under the supersound guide percutaneous puncture's location more stable, effectively improved the success rate of puncture, effectively avoid the emergence of complication simultaneously.

Drawings

Fig. 1 is a schematic structural view of a state in which a movement of a needle core is performed according to an embodiment of the present invention;

fig. 2 is a schematic structural view of the needle core in a state of moving according to an embodiment of the present invention;

fig. 3 is a schematic structural view of another embodiment of the present invention;

fig. 4 is a schematic view of a partial structure in an embodiment of the present invention;

FIG. 5 is a schematic view of the positioning block shown in FIG. 3;

fig. 6 is a schematic view of a partial structure of a base according to an embodiment of the present invention;

fig. 7 is a schematic view of a partial structure of a chute according to an embodiment of the present invention;

fig. 8 is a schematic structural view of another embodiment of the present invention;

fig. 9 is a schematic view of the structure of the needle core shown in fig. 8 according to the present invention in a state of moving.

Description of the labeling:

1. a sleeve; 11. a chute; 12. a pinhole; 13. a limiting block; 14. a pipe tail; 15. a gasket; 16. a guide groove A; 17. a guide groove B; 18. a guide groove C; 2. a needle core; 21. a magnetic region; 22. needle tail; 23. a guide block; 24. positioning blocks; 241. a fastening part; 242. a pressing part; 25. a pushing block; 3. a fixing device; 31. a fixing pin; 32. a base; 321. a bayonet; 33. a connecting rod; 331. a sliding part; 4. an elastic mechanism.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

The utility model discloses insert the focus with nook closing member 2 together with sleeve pipe 1, then can nook closing member 2 take out, utilize fixing device 3 to be fixed in the focus with pipe box 1, can put into corresponding biopsy needle in the sleeve pipe 1 and carry out the biopsy and draw materials, the biopsy finishes, nook closing member 2 is put into sleeve pipe 1 once more, removes sleeve pipe 1's fixed to together take out sleeve pipe 1 and nook closing member 2, withdraw from the focus.

As shown in fig. 1-9, the coaxial trocar for fixing a lesion during percutaneous lung aspiration biopsy provided by the present invention comprises a tube sleeve 1, a needle core 2, and a fixing device 3;

the stylet 2 can move in and out along the length direction of the cannula 1 in the cannula 1, and the fixing device 3 is arranged in the cannula 1 and can move synchronously along the movement direction of the stylet 2;

the fixing device 3 comprises a base 32 and a fixing needle 31 connected with the base 32, the sleeve 1 is provided with a needle hole 12 for the fixing needle 31 to pass through, and a chute 11 for providing moving guide for the fixing needle 31; the fixing devices 3 are at least symmetrically arranged in one group, and in the following embodiments, a group of two fixing devices 3 is taken as an example.

The inner wall of the sleeve 1 is provided with a limiting block 13 for limiting the movement of the base 32 when the needle core 2 moves.

In one embodiment, the base 32 is a magnetic block with the same magnetism, and the core 2 is provided with a magnetic area 21 with the magnetism opposite to that of the base 32.

In this embodiment, when the stylet 2 is inserted into the cannula 1, the magnetic section 21 is opposite to the two symmetrically arranged bases 32, so that when the bases 32 contact the magnetic section 21 on the stylet 2, the two are attracted, and at this time, the fixing device 3 moves synchronously with the movement of the stylet 2. When the stylet 2 continues to move, the fixing device 3 synchronously moves, namely the fixing needle 31 moves along the length direction of the chute 11, so that the sleeve 1 and the stylet 2 can be synchronously inserted into a focus; the stylet 2 is drawn out, the fixing device 3 and the stylet 2 synchronously move, and the fixing needle 31 is withdrawn in the chute 11 and penetrates out through the needle hole 12 on the sleeve 1. The stylet 2 continues to move, the base 32 is separated from the magnetic area 21 on the stylet 2 due to the action of the limiting block 13, the stylet 2 is drawn out, and the symmetrical bases 32 have the same magnetism and can repel each other, so that the fixing needle 31 is fixed at the position of the needle hole 12, and the sleeve 1 is fixed at the focus. The needle core 2 is inserted again, when the magnetic area 21 contacts the base 32, the fixing needle 31 and the needle core are driven to move synchronously, and along with the movement of the needle core 2, the fixing needle 31 is separated from the needle hole 12, and then the cannula can be drawn out together with the lesion.

It should be noted that, the fixing pin 31 is elastically connected to the base 32, so that the fixing pin 31 is elastically compressed when moving along the length direction of the sliding chute 11, and is in a natural state when the base 32 contacts the stopper 13. By way of example only, and not limitation. For example, the fixing pin 31 is connected with the base 32 through a torsion spring to achieve the above-mentioned function.

In order to guide the needle core 2 under the insertion, the end part of the needle core 2 is prevented from touching the limiting block 13 to cause the protrusion blocking.

A gasket 15 is arranged on one side of the limiting block 13 in the sleeve 1, and the inner diameter of the gasket 15 is matched with the outer diameter of the needle core 2.

It will be further appreciated that the washer 15 may be integrally formed with the stopper 13.

In this arrangement, it will still be appreciated that the washer 15, stopper 13 and inner wall of the casing 1 may be integrally formed.

In another embodiment, the needle core 2 is provided with a guide block 23 and a positioning block 24, the inner wall of the end portion of the cannula 2 is provided with a guide groove a16, a guide groove B17 and a guide groove C18 for moving the guide block 23, the guide groove a16, the guide groove B17 and the guide groove C18 are sequentially connected, the base 32 is provided with a bayonet 321 capable of engaging with the positioning block 24 and a connecting rod 33 movably connected with the sliding groove 11, the end portion of the connecting rod 33 is provided with a sliding portion 331, and the sliding portion 331 is embedded in the sliding groove 11 and synchronously moves in the sliding groove 11 along with the movement of the base 32.

In this embodiment, after the stylet 2 is inserted into the cannula 1, the stylet 2 is rotated to engage the positioning block 24 with the bayonet 321 on the base 32, and then the stylet 2 is pushed to drive the base 32 to move synchronously, so as to drive the fixing needle 31 to move along the length direction of the sliding groove 11.

Therefore, it can be understood that the positioning block 24 and the guide block 23 are positioned on the core 2 with certain limitations. As an example, the guide groove a16, the guide groove B17, and the guide groove C18 are sequentially connected to form a half-transverse n-shaped structure, so that the distance between the positioning block 24 and the notch 321 should be adapted to the length of the guide groove B17, and therefore, when the guide block 23 enters the guide groove a16, is rotated to enter the guide groove B17, and moves to the end of the guide groove B17, the positioning block 24 can be just engaged with the notch 321.

Further, the positioning block 24 includes, but is not limited to, an engaging portion 241 and a pressing portion 242, the engaging portion 241 is insertable into the bayonet 321, and the pressing portion 242 is pressed against the upper surface of the base 32 in a state where the engaging portion 241 is inserted into the bayonet 321.

That is, when positioning block 24 is engaged with notch 321, engaging portion 241 is fitted into notch 321, and pressing portion 242 is pressed against the upper surface of base 32.

When the positioning block 24 is engaged with the bayonet 321, the needle core 2 is moved to drive the base 32 to move synchronously, i.e. to drive the fixing needle 31 to move synchronously.

In the process of drawing out the needle core 2, when the base 32 contacts the limiting block 13, the fixing needle 31 penetrates out of the needle hole 12, the reverse needle core 2 is rotated, the positioning block 24 is separated from the bayonet 321, when the needle core 2 is drawn out, the needle core 2 needs to be rotated again, the position of the guide block 23 corresponds to the position of the guide groove C18, the needle core 2 can be drawn out, the fixing needle 31 fixes the sleeve 1 on a focus, and a corresponding biopsy needle can be placed in the sleeve 1 for biopsy sampling. The operation of extracting the cannula 1 is the same as above, and will not be described again.

In order to better realize the fixing of the connecting rod 33 in the base 32 and the sleeving 1 and the better sliding of the connecting rod 33 in the sliding chute 11, namely, the aim of facilitating the base 32 to move synchronously along with the movement of the stylet 2 is realized.

Further preferably, the sliding portion 331 and the connecting rod 33 are combined to form a T-shaped structure or an L-shaped structure, and the sliding structure of the sliding chute 11 has a shape corresponding to the T-shaped structure or the L-shaped structure.

In another embodiment, the stylet 2 is provided with a pushing block 25, the pushing block 25 pushes a base 32 to move synchronously with the stylet 2 in the state that the stylet 2 is moving, the base 32 is provided with a connecting rod 33 movably connected with the chute 11, the end of the connecting rod 33 is provided with a sliding part 331, the sliding part 331 is embedded in the chute 11 and moves synchronously in the chute 11 along with the movement of the base 32, and the sliding part 331 is connected with the end of the chute 11 through an elastic mechanism 4.

Preferably, the elastic mechanism 4 is a spring or a spring sheet.

In the present embodiment, by way of example only, when the elastic mechanism 4 is a spring, it can be understood that the spring is in a natural state, and the fixing needle 31 just penetrates through the needle hole 12.

Then, it can be further understood that, when the needle core 2 is inserted into the cannula 1 to move forward, after the pushing block 25 contacts the base 32, the base 32 is pushed, the base 32 moves synchronously along the connecting rod 33 under the action of the sliding groove 11, so that the fixing needle 31 moves synchronously along the length direction of the sliding groove 11, the cannula 1 and the needle core 2 are inserted into the lesion, the needle core 2 is drawn out, namely, when the needle core 2 moves, the spring is reset gradually until the pushing block 25 is separated from the base 32, the spring is in a natural state, the fixing needle 31 penetrates out of the needle hole 12, and the cannula 1 is fixed on the lesion. Thereafter, a corresponding biopsy needle may be placed in the cannula 1 for taking the biopsy material. The stylet 2 is inserted again, and the remaining cannula 1 of the stylet 2 can be synchronously drawn out after the fixing needle 31 is separated from the needle hole 12 similarly.

In the above embodiment, in order to avoid over-insertion of the needle core 2, the needle tail 22 is provided at the tail of the needle core 2, and the width of the needle tail 22 is larger than the inner diameter of the cannula 1.

In order to facilitate the extraction of the casing 1, a pipe tail 14 is provided at the tail of the casing 1.

In view of the above embodiments, it can be appreciated that a plurality of sleeves 1 can be connected together for use by means of a cable tie or a connecting piece.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A coaxial trocar for fixing focus in percutaneous lung puncture biopsy is characterized by comprising a cannula (1), a stylet (2) and a fixing device (3);

the stylet (2) can move in and out along the length direction of the sleeve (1) in the sleeve (1), and the fixing device (3) is arranged in the sleeve (1) and can move synchronously along the movement direction of the stylet (2);

the fixing device (3) comprises a base (32) and a fixing needle (31) connected with the base (32), wherein a needle hole (12) for the fixing needle (31) to penetrate through is formed in the sleeve (1), and a sliding groove (11) for providing moving guide for the fixing needle (31) is formed in the sleeve; the fixing devices (3) are at least symmetrically arranged in one group;

the inner wall of the sleeve (1) is provided with a limiting block (13) for limiting the movement of the base (32) when the needle core (2) moves.

2. The coaxial trocar for fixing the lesion during the percutaneous lung aspiration biopsy as claimed in claim 1, wherein the symmetrically arranged base (32) adopts the same magnetic block, and the needle core (2) is provided with a magnetic area (21) with the magnetism opposite to that of the base (32).

3. The coaxial trocar for fixing the focus in the percutaneous lung aspiration biopsy according to claim 1, wherein a gasket (15) is arranged at one side of the limiting block (13) in the cannula (1), and the inner diameter of the gasket (15) is matched with the outer diameter of the needle core (2).

4. The coaxial trocar for fixing the focus in the percutaneous lung aspiration biopsy according to claim 3, wherein the gasket (15) can be integrally formed with the limiting block (13).

5. The coaxial trocar for fixing the focus in the percutaneous lung puncture biopsy according to claim 1, it is characterized in that the stylet (2) is provided with a guide block (23) and a positioning block (24), the inner wall of the end part of the sleeve (1) is provided with a guide groove A (16), a guide groove B (17) and a guide groove C (18) for the guide block (23) to move, the guide groove A (16), the guide groove B (17) and the guide groove C (18) are connected in sequence, a bayonet (321) which can be clamped with the positioning block (24) is arranged on the base (32), and a connecting rod (33) movably connected with the sliding groove (11), wherein the end part of the connecting rod (33) is provided with a sliding part (331), the sliding part (331) is embedded in the sliding groove (11), and moves synchronously in the chute (11) with the movement of the base (32).

6. The coaxial trocar for fixing the lesion during the percutaneous lung aspiration biopsy as claimed in claim 5, wherein the sliding part (331) and the connecting rod (33) are combined to form a T-shaped structure or an L-shaped structure, and the sliding structure of the sliding chute (11) has a shape corresponding to the T-shaped structure or the L-shaped structure.

7. The coaxial trocar for lesion fixation during percutaneous lung aspiration biopsy as claimed in claim 5, wherein the positioning block (24) comprises but is not limited to a clamping portion (241) and a pressing portion (242), the clamping portion (241) can be inserted into the bayonet (321), and the pressing portion (242) is pressed against the upper surface of the base (32) in a state that the clamping portion (241) is inserted into the bayonet (321).

8. The coaxial trocar for fixing the lesion during the percutaneous lung aspiration biopsy as claimed in claim 1, wherein the stylet (2) is provided with a pushing block (25), the pushing block (25) pushes a base (32) to move synchronously with the stylet (2) in a moving state of the stylet (2), the base (32) is provided with a connecting rod (33) movably connected with the chute (11), the end of the connecting rod (33) is provided with a sliding part (331), the sliding part (331) is embedded in the chute (11) and moves synchronously in the chute (11) along with the movement of the base (32), and the sliding part (331) is connected with the end of the chute (11) through an elastic mechanism (4).

9. The coaxial trocar for fixing the lesion in the percutaneous lung aspiration biopsy according to claim 8, wherein the elastic mechanism (4) is a spring or a shrapnel.

10. The coaxial trocar for fixing the lesion during the percutaneous lung aspiration biopsy as claimed in any one of claims 1 to 9, wherein the fixing needle (31) is elastically connected with the base (32) so that the fixing needle (31) is elastically compressed when moving along the length direction of the chute (11) and is in a natural state when the base (32) is in contact with the stopper (13).