CN114521926A - Disposable lung aspiration biopsy sampling device - Google Patents
Disposable lung aspiration biopsy sampling device Download PDFInfo
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- CN114521926A CN114521926A CN202210285570.4A CN202210285570A CN114521926A CN 114521926 A CN114521926 A CN 114521926A CN 202210285570 A CN202210285570 A CN 202210285570A CN 114521926 A CN114521926 A CN 114521926A
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- needle cylinder
- piston
- knob
- side wall
- piston rod
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/02—Instruments for taking cell samples or for biopsy
- A61B10/0233—Pointed or sharp biopsy instruments
- A61B10/0283—Pointed or sharp biopsy instruments with vacuum aspiration, e.g. caused by retractable plunger or by connected syringe
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- Heart & Thoracic Surgery (AREA)
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- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention relates to a disposable lung puncture biopsy sampling device, which comprises a needle cylinder, a needle cylinder sleeve, a knob, a piston and a piston rod, wherein the front end of the needle cylinder is connected with a needle cylinder interface, the inner side wall of the needle cylinder interface is provided with an internal thread A, the internal thread A is used for being butted with a puncture guide needle, the needle cylinder sleeve is sleeved on the periphery of the needle cylinder, the needle cylinder sleeve and the needle cylinder are connected by a thread pair, the knob is connected on the needle cylinder sleeve, the needle cylinder sleeve moves up and down relative to the needle cylinder around a symmetrical shaft by rotating the knob, the self-locking is realized through a thread pair, a piston rod penetrates through the inside of the needle cylinder, the bottom end of the piston rod is connected with a piston, the outer side wall of the piston is in contact connection with the inner side wall of the needle cylinder, the other end of the piston rod is fixed on a limiting block, the limiting block is connected with a knob, the piston rod moves upwards or downwards under the driving of the knob along with the limiting block, and the lower surface of the piston and the inner side wall of the needle cylinder form a collecting containing cavity; the invention can realize accurate regulation and control of negative pressure and maintenance of negative pressure, reduce physical consumption of a surgeon and ensure success rate of biopsy.
Description
[ technical field ]
The invention relates to the field of medical instruments, in particular to the field of lung aspiration biopsy, and specifically relates to a disposable lung aspiration biopsy tissue sampling device.
[ background art ]
The lung aspiration biopsy is used for sampling nodules or tumors of the lung of a human body, and particularly plays an important role in early screening and early diagnosis of suspected lung diseases. After the puncture guide needle has been punctured percutaneously to the lesion site, the operator uses a conventional syringe for aspiration sampling in addition to the puncture gun for sampling. During sampling, the front end needle head of the puncture guide needle is left in a focus, and the tail end is in vitro to form a sampling channel; after the operator pushes the piston of the injector to the bottom, the needle cylinder interface is aligned to the tail end of the puncture guide needle, and the piston rod of the injector is pulled, so that negative pressure is formed in the injector for suction.
However, because the inner diameter of the puncture guide needle is small, typically less than 2mm, and the length of the guide needle is typically greater than 150mm, and because the nodule or tumor is relatively hard, the operator must aspirate multiple times or manually hold the syringe plunger position for a long period of time to maintain the negative pressure. This procedure tends to cause the leading needle tip to detach from the nodule or tumor, eventually failing to retrieve the lesion tissue.
If a disposable lung puncture biopsy sampling device is provided, negative pressure can be generated to carry out tissue sampling, the negative pressure can be accurately regulated and controlled and maintained, the physical consumption of operators is greatly reduced, the success rate of biopsy operation is ensured, and the device has very important clinical significance.
[ summary of the invention ]
The invention aims to solve the defects and provide a disposable lung puncture biopsy sampling device which can realize accurate regulation and control of negative pressure and maintenance of negative pressure, reduce physical consumption of a surgeon and ensure success rate of biopsy.
In order to realize the purpose, the disposable lung puncture biopsy sampling device comprises a needle cylinder 2, a needle cylinder sleeve 3, a knob 4, a piston 10 and a piston rod 9, wherein the front end of the needle cylinder 2 is connected with the needle cylinder interface 1, the inner side wall of the needle cylinder interface 1 is provided with an internal thread A12, the internal thread A12 is used for being butted with a puncture guide needle, the needle cylinder sleeve 3 is sleeved on the periphery of the needle cylinder 2, the needle cylinder sleeve 3 is connected with the needle cylinder 2 through a thread pair 8, the knob 4 is connected on the needle cylinder sleeve 3, the needle cylinder sleeve 3 moves up and down around a symmetrical shaft 15 relative to the needle cylinder 2 through the rotary knob 4 and realizes self-locking through the thread pair 8, the piston rod 9 is arranged in the needle cylinder 2 in a penetrating manner, the bottom end of the piston rod 9 is connected with the piston 10, the outer side wall of the piston 10 is in contact connection with the inner side wall of the needle cylinder 2, and the other end of the piston rod 9 is fixed on a limiting block 5, the limiting block 5 is connected with the knob 4, the piston rod 9 moves upwards or downwards under the driving of the knob 4 along with the limiting block 5, the lower surface of the piston 10 and the inner side wall of the needle cylinder 2 form a collecting cavity 11, the collecting cavity 11 moves upwards or downwards along with the piston 10 to increase or decrease the volume, and then the negative pressure increases or decreases.
Further, the needle cylinder 2 is cylindrical, and both the needle cylinder 2 and the needle cylinder sleeve 3 are made of transparent or semitransparent medical plastics.
Further, the thread pair 8 is formed by an internal thread 14 on the inner side wall of the syringe jacket 3 and an external thread 13 on the outer side wall of the syringe 2, and the thread pair 8 is, but not limited to, a trapezoidal thread or a zigzag thread.
Further, knob 4 and syringe cover 3 formula structure as an organic whole or detachable split type structure, the design has open slot 6 or annular knurl on the 4 outer walls of knob, open slot 6 or annular knurl increase frictional force when being used for manual rotation.
Further, the piston 10 and the piston rod 9 are of an integrated structure or a detachable split structure, and the piston 10 and the piston rod 9 are made of medical hard plastics.
Further, the other end of the piston rod 9 is connected with the limiting block 5 into a whole through a screw, and the limiting block 5 and the knob 4 are of a detachable structure which is in surface contact and can be separated from each other, or of a structure which is fixedly connected through a screw.
Further, the outer side wall of the piston 10 is embedded with an elastic sealing ring 16, and the elastic sealing ring 16 is in direct contact with the inner side wall of the syringe 2 and maintains the pressing force.
Furthermore, the outer side wall of the needle cylinder 2 is provided with a scale 7, and the scale 7 is used for marking the negative pressure of the collecting cavity 11.
Compared with the prior art, the invention provides a disposable lung puncture biopsy sampling device, which can generate negative pressure to sample tissues, can accurately regulate and control the negative pressure and maintain the negative pressure, greatly reduces the physical consumption of an operator, ensures the success rate of biopsy, and avoids the phenomenon that the sampling fails because the puncture guide needle is easy to displace because the operator needs to frequently suck and keep the negative pressure for sampling by adopting a conventional injector in the conventional lung puncture biopsy; in addition, the device has the advantages of simple structure, low cost, strong practicability and important application value, and is worthy of clinical popularization and application.
[ description of the drawings ]
FIG. 1 is a front view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a partial structural view of the thread pair of the present invention;
in the figure: 1. syringe interface 2, syringe 3, syringe cover 4, knob 5, stopper 6, open slot 7, scale 8, screw thread pair 9, piston rod 10, piston 11, collection appearance chamber 12, internal thread A13, external screw thread 14, internal thread 15, symmetry axis 16, elastic sealing ring.
[ detailed description of the invention ]
As shown in the attached drawings 1 to 3, the invention provides a disposable lung puncture biopsy sampling device which can realize accurate regulation and control of negative pressure and maintenance of negative pressure, reduce physical consumption of a surgeon and ensure success rate of biopsy. The disposable lung puncture biopsy sampling device comprises a needle cylinder 2, a needle cylinder sleeve 3, a knob 4, a piston 10 and a piston rod 9, wherein the front end of the needle cylinder 2 is connected with a needle cylinder interface 1, the inner side wall of the needle cylinder interface 1 is provided with an internal thread A12, the internal thread A12 is used for butt joint with a puncture guide needle, the periphery of the needle cylinder 2 is sleeved with the needle cylinder sleeve 3, the needle cylinder sleeve 3 is connected with the needle cylinder 2 by adopting a thread pair 8, the knob 4 is connected on the needle cylinder sleeve 3, the needle cylinder sleeve 3 moves up and down relative to the needle cylinder 2 by rotating the knob 4 around a symmetry shaft 15 and realizes self-locking by the thread pair 8, the piston rod 9 is arranged in the needle cylinder 2 in a penetrating way, the bottom end of the piston rod 9 is connected with the piston 10, the outer side wall of the piston 10 is embedded with an elastic sealing ring 16, the elastic sealing ring 16 is in direct contact with the inner side wall of the needle cylinder 2 and keeps extrusion force, the other end of the piston rod 9 is fixed on the stopper 5, the stopper 5 is connected with the knob 4, the piston rod 9 moves upwards or downwards under the drive of the knob 4 along with the limiting block 5, the lower surface of the piston 10 and the inner side wall of the needle cylinder 2 form a collection containing cavity 11, the volume of the collection containing cavity 11 is increased or reduced along with the upward or downward movement of the piston 10, and then the negative pressure is increased or reduced, or self-locking is realized under the action of the thread pair 8 so as not to move upwards or downwards, and thus the negative pressure in the collection containing cavity 11 is maintained; the outer side wall of the needle cylinder 2 is provided with a scale 7, and the scale 7 is used for marking the negative pressure of the collecting cavity 11.
The invention is further illustrated below with reference to specific examples:
the invention relates to a disposable lung puncture biopsy sampling device, which mainly comprises a needle cylinder 2, a needle cylinder sleeve 3, a knob 4, a piston 10 and a piston rod 9. Wherein the content of the first and second substances,
the syringe 2 is cylindrical and made of transparent or semitransparent medical plastics; the front end of the needle cylinder 2 is provided with a needle cylinder interface 1, and the inner side wall of the needle cylinder interface 1 is provided with internal threads A12 for butting with a puncture guiding needle. The outer side wall of the needle cylinder 2 is provided with scales 7 for marking the negative pressure of the collecting cavity 11; the scale 7 may be an equidistant scale or an unequally spaced scale, or a similar scheme with different colors may be used to mark the negative pressure in the collection cavity 11.
The syringe sleeve 3 is made of transparent or semitransparent medical plastics; the needle cylinder sleeve 3 is connected with the needle cylinder 2 by a thread pair 8, and the thread pair 8 consists of an internal thread 14 on the inner side wall of the needle cylinder sleeve 3 and an external thread 13 on the outer side wall of the needle cylinder 2; the thread pair 8 may be a trapezoidal thread, a buttress thread or other forms of threads; the thread pair 8 should have a self-locking effect: when a pushing force is exerted along the symmetry axis 15 of the needle cylinder 2, the needle cylinder sleeve 3 cannot be pushed to move relative to the needle cylinder 2; when the needle cylinder sleeve 3 is around the symmetry axis 15, it can move relative to the needle cylinder 2.
The lower surface of the piston 10 and the inner side wall of the needle cylinder 2 form a collecting cavity 11, and the volume of the collecting cavity 11 changes along with the movement of the piston 10; the piston 10 moves upwards, the volume of the collecting cavity 11 is increased, and the negative pressure is increased; the piston 10 moves downwards and the volume of the collection volume 11 decreases and the negative pressure decreases.
When the knob 4 is rotated, the needle cylinder sleeve 3 gradually moves upwards under the action of the thread pair 8, and simultaneously the knob 4 drives the limiting block 5 to move upwards so as to drive the piston 10 and the piston rod 9 to move upwards, so that the volume in the collecting accommodating cavity 11 is increased, and the negative pressure is increased; when the knob 4 is rotated in the opposite direction, the needle cylinder sleeve 3 gradually moves downwards under the action of the thread pair 8, meanwhile, the knob 4 drives the limiting block 5 to move downwards, further drives the piston 10 and the piston rod 9 to move downwards, the volume in the collecting accommodating cavity 11 is reduced, and the negative pressure is reduced. When the knob 4 is temporarily stopped rotating, the syringe sleeve 3 is self-locked under the action of the thread pair 8, and cannot move upwards or downwards, so that the negative pressure in the collection cavity 11 is maintained.
In the invention, the piston 10 and the piston rod 9 can be integrated or split, and the material is medical hard plastic; the outer side wall of the piston 10 is embedded with an elastic sealing ring 16, and the elastic sealing ring 16 is directly contacted with the inner side wall of the needle cylinder 2 and keeps certain extrusion force; the other end of the piston rod 9 is connected with the limiting block 5 through screws and the like, and the limiting block 5 and the knob 4 can be in surface contact and separated from each other and can also be fixedly connected through screws and the like.
In the invention, the needle cylinder sleeve 3 is provided with the knob 4, and the knob 4 and the needle cylinder sleeve 3 can be integrated or separated; the knob 4 and the needle cylinder sleeve 3 should do synchronous rotation motion around the symmetrical axis 15; an open slot 6 is designed on the knob 4 and is used for increasing friction force during manual rotation; the slot 6 is only one design case, and any design form for increasing the friction force, such as knurling, is within the scope of the invention.
The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.
Claims (8)
1. A disposable lung aspiration biopsy sampling device which is characterized in that: comprises a needle cylinder (2), a needle cylinder sleeve (3), a knob (4), a piston (10) and a piston rod (9), wherein the front end of the needle cylinder (2) is connected with the needle cylinder interface (1), the inner side wall of the needle cylinder interface (1) is provided with an internal thread A (12), the internal thread A (12) is used for being butted with a puncture guide needle, the needle cylinder sleeve (3) is sleeved on the periphery of the needle cylinder (2), the needle cylinder sleeve (3) is connected with the needle cylinder (2) through a thread pair (8), the knob (4) is connected on the needle cylinder sleeve (3), the needle cylinder sleeve (3) moves up and down around a symmetrical shaft (15) relative to the needle cylinder (2) through a rotary knob (4) and realizes self-locking through the thread pair (8), the piston rod (9) is arranged inside the needle cylinder (2) in a penetrating manner, the bottom end of the piston rod (9) is connected with the piston (10), the outer side wall of the piston (10) is in contact with the inner side wall of the needle cylinder (2), the other end of the piston rod (9) is fixed on the limiting block (5), the limiting block (5) is connected with the knob (4), the piston rod (9) moves upwards or downwards under the driving of the knob (4) along with the limiting block (5), the lower surface of the piston (10) and the inner side wall of the needle cylinder (2) form a collecting accommodating cavity (11), the collecting accommodating cavity (11) moves upwards or downwards along with the piston (10) to increase or reduce the volume, and further the negative pressure is increased or reduced.
2. The disposable lung biopsy sampling device of claim 1, wherein: the needle cylinder (2) is cylindrical and barrel-shaped, and the needle cylinder (2) and the needle cylinder sleeve (3) are both made of transparent or semitransparent medical plastics.
3. The disposable lung biopsy sampling device of claim 1, wherein: the thread pair (8) is composed of an internal thread (14) on the inner side wall of the needle cylinder sleeve (3) and an external thread (13) on the outer side wall of the needle cylinder (2), and the thread pair (8) is not limited to a trapezoidal thread or a sawtooth thread.
4. The disposable lung biopsy sampling device of claim 1, wherein: knob (4) and syringe cover (3) formula structure as an organic whole or be detachable split type structure, open slot (6) or annular knurl have been designed on knob (4) outer wall, increase frictional force when open slot (6) or annular knurl are used for manual rotation.
5. The disposable lung biopsy sampling device of claim 1, wherein: the piston (10) and the piston rod (9) are of an integrated structure or a detachable split structure, and the piston (10) and the piston rod (9) are made of medical hard plastics.
6. The disposable lung biopsy sampling device of claim 1, wherein: the other end of the piston rod (9) is connected with the limiting block (5) into a whole through a screw, and the limiting block (5) and the knob (4) are of detachable structures which are in surface contact and can be separated from each other, or of structures fixedly connected by screws.
7. The disposable lung biopsy sampling device of any one of claims 1 to 6, wherein: the outer side wall of the piston (10) is embedded into an elastic sealing ring (16), and the elastic sealing ring (16) is in direct contact with the inner side wall of the needle cylinder (2) and keeps extrusion force.
8. The disposable lung biopsy sampling device of any one of claims 1 to 6, wherein: the needle cylinder is characterized in that scales (7) are arranged on the outer side wall of the needle cylinder (2), and the scales (7) are used for marking the negative pressure of the collecting accommodating cavity (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210285570.4A CN114521926A (en) | 2022-03-23 | 2022-03-23 | Disposable lung aspiration biopsy sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210285570.4A CN114521926A (en) | 2022-03-23 | 2022-03-23 | Disposable lung aspiration biopsy sampling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114521926A true CN114521926A (en) | 2022-05-24 |
Family
ID=81626745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210285570.4A Pending CN114521926A (en) | 2022-03-23 | 2022-03-23 | Disposable lung aspiration biopsy sampling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114521926A (en) |
-
2022
- 2022-03-23 CN CN202210285570.4A patent/CN114521926A/en active Pending
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