CN115414077A - Negative pressure biopsy needle - Google Patents
Negative pressure biopsy needle Download PDFInfo
- Publication number
- CN115414077A CN115414077A CN202211206963.8A CN202211206963A CN115414077A CN 115414077 A CN115414077 A CN 115414077A CN 202211206963 A CN202211206963 A CN 202211206963A CN 115414077 A CN115414077 A CN 115414077A
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- Prior art keywords
- needle
- negative pressure
- needle cylinder
- piston rod
- cylinder
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- 238000001574 biopsy Methods 0.000 title claims abstract description 46
- 230000000903 blocking effect Effects 0.000 claims description 6
- 238000013459 approach Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 230000001960 triggered effect Effects 0.000 claims description 2
- 208000009453 Thyroid Nodule Diseases 0.000 abstract description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000001685 thyroid gland Anatomy 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
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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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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medical Informatics (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Pathology (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a negative pressure biopsy needle, which comprises an inner needle, an outer needle, a needle cylinder and a piston rod, wherein a needle seat of the outer needle is connected to the front end of the needle cylinder; the front end of the piston rod is positioned in the needle cylinder and can slide in the needle cylinder in a direction parallel to the needle inserting direction; the piston rod is pulled in the reverse direction of the needle inserting direction, so that negative pressure can be formed in the needle cylinder; the inner needle is fixedly connected with the front end of the piston rod; the negative pressure spring is arranged between the rear end of the piston rod and the needle cylinder; after the upper chord, the rear end of the piston rod is connected with the needle cylinder; the negative pressure biopsy needle further comprises a trigger mechanism, and the trigger mechanism can disconnect the rear end of the piston rod from the needle cylinder. The invention can pop out the piston rod under the action of the spring, so that negative pressure is generated in the needle cylinder, and the needle cylinder can be used for biopsy operation of thyroid nodules; the piston rod can be popped up by pressing the button, so that the operation is convenient and the device is suitable for single-hand operation.
Description
Technical Field
The invention relates to a negative pressure biopsy needle.
Background
In biopsy operations such as thyroid gland, a biopsy needle needs to be punctured to a target position under the assistance of ultrasound, then an inner needle is pulled out, then tissues are sucked into the biopsy needle by means of siphon action or negative pressure of an injector, then the puncture needle is pulled out of a human body, and the tissues of the biopsy needle are pushed out by the injector to obtain the tissues so as to complete biopsy.
When the doctor needs to hold the ultrasonic probe by one hand and control the biopsy needle by the other hand, the operation is difficult to be completed by a single person because the syringe needs to have suction action.
Disclosure of Invention
In view of this, the present invention provides a negative pressure biopsy needle, which can suck tissue into the biopsy needle by pressing a button, is convenient to operate, and is suitable for one-handed operation.
The invention adopts the following technical scheme: a negative pressure biopsy needle, comprising an inner needle and an outer needle, further comprising a needle cylinder, a piston rod, wherein: the needle seat of the outer needle is connected with the front end of the needle cylinder; the inner needle is fixedly connected with the front end of the piston rod; the front end of the piston rod is positioned in the needle cylinder and can slide in the needle cylinder in parallel to the needle insertion direction; the piston rod is pulled in the reverse direction of the needle inserting direction to form negative pressure in the needle cylinder; the negative pressure spring is arranged between the rear end of the piston rod and the needle cylinder, and the elastic direction of the negative pressure spring is the direction in which the rear end of the piston rod is far away from the needle cylinder; before triggering, the rear end of the piston rod is connected to the needle cylinder; the negative pressure biopsy needle further comprises a trigger mechanism, and the trigger mechanism can disconnect the rear end of the piston rod from the needle cylinder after being triggered, so that the rear end of the piston rod is far away from the needle cylinder, and negative pressure is formed in the needle cylinder.
Preferably, the trigger mechanism comprises a button, a trigger lever, a locking link, wherein: the locking connecting rod is positioned on the outer surface of the needle cylinder, and the rear end of the locking connecting rod is fixedly connected with the rear end of the piston rod; the front end of the locking connecting rod is provided with a front hook, the rear end of the trigger lever is provided with a rear hook, the middle part of the trigger lever is provided with a fulcrum, and the front hook and the rear hook are hooked together before triggering; the button is arranged on the outer surface of the needle cylinder, and when the button is pressed down, the button touches the front end of the trigger lever, so that the rear end of the trigger lever moves towards the direction far away from the outer surface of the needle cylinder, and the front hook and the rear hook are unhooked.
Preferably, an elastic support is provided between the front end of the trigger lever and the outer surface of the cylinder, and the elasticity of the elastic support allows the front hook and the rear hook to approach each other.
Preferably, the elastic supporting element is a spring, and two ends of the spring respectively abut against the outer surface of the needle cylinder and the trigger lever.
Preferably, the elastic support comprises a support body and a first elastic arm and a second elastic arm which extend from the support body to the front side and form an included angle; wherein: the first elastic arm is abutted against the outer surface of the needle cylinder, the end part of the second elastic arm is abutted against the trigger lever, and the first elastic arm and the second elastic arm have elastic force which is far away from each other; the button is pressed, the rear end of the button presses the front end of the trigger lever, so that the trigger lever approaches to the needle cylinder, the free end of the second elastic arm close to the trigger lever is pressed to the needle cylinder, the trigger lever rotates around the fulcrum, the rear end of the trigger lever is lifted, and the rear hook positioned at the rear end of the trigger lever is unhooked from the front hook of the locking connecting rod.
Preferably, a button spring is arranged between the button and the outer surface of the syringe.
Preferably, a guide groove extending in the axial direction of the cylinder is provided on the outer surface of the cylinder, and the locking link is located in the guide groove.
Preferably, the negative pressure biopsy needle further comprises a fixture block, the fixture block is fixedly connected to the wall of the rear portion of the needle cylinder, a blocking portion is arranged on the fixture block and close to the center of the needle cylinder, and the blocking portion blocks a path of the piston rod (4) moving in the reverse direction of the needle inserting direction.
Preferably, the needle seat of the outer needle is non-detachably connected with the front end of the needle cylinder.
Preferably, the inner needle is a solid needle.
According to the technical scheme of the invention, the negative pressure biopsy needle comprises an inner needle, an outer needle, a needle cylinder and a piston rod, wherein a needle seat of the outer needle is connected to the front end of the needle cylinder, and the inner needle is fixedly connected to the front end of the piston rod; the front end of the piston rod is positioned in the needle cylinder and can slide in the needle cylinder in parallel to the needle insertion direction; the negative pressure spring is arranged between the rear end of the piston rod and the needle cylinder, the negative pressure biopsy needle further comprises a trigger mechanism, and the trigger mechanism can disconnect the rear end of the piston rod from the needle cylinder, so that the piston rod is ejected in the reverse direction of the needle inserting direction under the action of the spring. The invention can eject the piston rod under the action of the spring, so that negative pressure is generated in the needle cylinder, and the needle cylinder can be used for biopsy operation of thyroid nodules.
Drawings
For purposes of illustration and not limitation, the present invention will now be described in accordance with its preferred embodiments, particularly with reference to the accompanying drawings, wherein:
FIG. 1 is a perspective view of a negative pressure biopsy needle according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view (cross-sectional plane perpendicular to the button spring centerline) of a negative pressure biopsy needle according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view of a negative pressure biopsy needle of an embodiment of the present invention (the cut plane passing through the button spring centerline);
fig. 4 is a partially enlarged view of fig. 3.
In the figure, 1-outer needle, 2-needle cylinder, 21-extension, 211-rear surface, 3-inner needle, 4-piston rod, 41-slider, 42-rod, 43-pushing part, 431-front surface, 5-negative pressure spring, 6-locking link, 61-front hook, 7-trigger lever, 71-fulcrum, 72-rear hook, 8-button, 81-contact, 9-latch, 91-blocking part, 10-guide groove, 11-elastic support, 111-support, 112-first elastic arm, 113-second elastic arm, 12-button spring.
Detailed Description
Referring to fig. 1 and 2, fig. 1 is a perspective view of a negative pressure biopsy needle according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a negative pressure biopsy needle according to an embodiment of the present invention (cross-sectional view perpendicular to the central axis of the button spring); the needle seat of the outer needle 1 of the negative pressure biopsy needle is connected with the front end of the needle cylinder 2, and the needle inserting direction of the biopsy needle points to the front end; the inner needle 3 is fixedly connected to the piston rod 4. The front end of the piston rod 4 is provided with a slide block 41, the middle part of the piston rod 4 is provided with a rod body 42, and the rear end of the piston rod 4 is provided with a pushing part 43; the slider 41 and the rod body 42 are positioned inside the cylinder 2, and the outer diameter of the slider 41 is equal to the inner diameter of the cylinder 2, so that the slider 41 can slide back and forth inside the cylinder 2 to function as a piston head. A latch 9 is provided at the rear of the cylinder 2 to prevent the piston rod 4 from being separated from the cylinder 2 when it is slid to the rearmost end. The fixture block 9 is fixedly connected to the wall of the rear part of the needle cylinder 2, a blocking part 91 is arranged on the fixture block 9 close to the center of the needle cylinder 2, and the blocking part 91 blocks the path of the slider 41 moving in the reverse direction of the needle inserting direction.
The rear end of the needle cylinder 2 extends to the direction far away from the central axis of the needle cylinder 2 to form a protruding part 21; the negative pressure spring 5 is sleeved on the rod body 42 of the piston rod 4, and two ends of the negative pressure spring respectively abut against the rear surface 211 of the extension part 21 and the front surface 431 of the pushing part 43; when the negative pressure spring 5 is released, the piston rod 4 is pushed to move reversely in the needle inserting direction, so that negative pressure is generated in the needle cylinder 2.
The locking connecting rod 6 is positioned on the outer surface of the needle cylinder 2 and is parallel to the needle cylinder 2, and the rear end of the locking connecting rod 6 is fixedly connected with the rear end of the piston rod 4. The outer surface of the cylinder 2 is provided with a guide groove 10 extending in the axial direction of the cylinder 2, and the lock link 6 is slidable in the guide groove 10.
Referring to fig. 3 and 4, fig. 3 is a sectional view of a negative pressure biopsy needle according to an embodiment of the present invention (the sectional view is through the central axis of the button spring); FIG. 4 is an enlarged view of a portion of FIG. 3; the button 8 is arranged on the outer surface of the needle cylinder 2, and a button spring 12 is arranged between the button 8 and the outer surface of the needle cylinder 2; a contact 81 is arranged on the button 8, and when the button 8 is pressed down, the contact 81 is contacted with the front end of the trigger lever 7; the rear end of the trigger lever 7 is provided with a rear hook 72, and the front end of the lock link 6 is provided with a front hook 61.
An elastic support 11 is arranged between the trigger lever 7 and the outer surface of the needle cylinder 2, and the elastic support 11 comprises a support body 111 and a first elastic arm 112 and a second elastic arm 113 which extend from the support body 111 to the front side and form an included angle. The first elastic arm 112 is pressed against the outer surface of the needle cylinder 2, the end of the second elastic arm 113 is pressed against the trigger lever 7, and the first elastic arm 112 and the second elastic arm 113 have elastic forces which are far away from each other. The elastic support 11 can also be a spring, the two ends of which respectively abut against the outer surface of the needle cylinder 2 and the trigger lever 7. Before the push button 8 is pressed, the rear hook 72 is hooked with the front hook 61 due to the action of the elastic support 11.
A fulcrum 71 is arranged at one side of the middle part of the trigger lever 7 close to the needle cylinder 2; when the button 8 is pressed, the contact 81 presses the front end of the trigger lever 7, so that the trigger lever 7 approaches the needle cylinder 2, and the free end of the second elastic arm 113 adjacent to the trigger lever 7 is pressed toward the needle cylinder 2, the rear end of the trigger lever 7 is lifted (to the right in the view of fig. 4) due to the fulcrum 71, and the rear hook 72 at the rear end of the trigger lever 7 is unhooked from the front hook 61 of the lock link 6. The first elastic arm 112 and the second elastic arm 113 are provided to stably hook the rear hook 72 and the front hook 61 together, and the rear hook 72 and the front hook 61 can be unhooked only by specifically applying a certain force to press the button 8.
In order to improve the use safety, the needle seat of the outer needle 1 is preferably fixedly and non-detachably connected with the front end of the needle cylinder 2. The inner needle 3 is preferably a solid needle, and the solid needle is more convenient to push out the human tissue in the outer needle 1 through the inner needle 3.
The use method of the negative pressure biopsy needle of the embodiment of the invention is as follows:
1. winding: pressing the pushing portion 43 to compress the negative pressure spring 5 causes the lock link 6 to move forward, whereby the front hook 61 and the rear hook 72 of the trigger lever 7 are hooked together.
2. The doctor operates the ultrasonic probe with one hand and operates the negative pressure biopsy needle with the other hand, and the needle point of the outer needle 1 of the negative pressure biopsy needle is inserted into the tubercle part under the guidance of the ultrasonic image.
3. Triggering: when the doctor presses the button 8 with one hand, the rear hook 72 is unhooked from the front hook 61, the piston rod 4 is ejected under the thrust of the negative pressure spring 5, so that negative pressure is generated in the needle cylinder 2, and human tissues in the tubercles are sucked into the outer needle 1.
4. The negative pressure biopsy needle is pulled out, the piston rod 4 is pushed, the cells in the outer needle 1 are pushed out through the inner needle 3, and biopsy sampling is completed.
According to the technical scheme of the embodiment of the invention, when the negative pressure spring 5 is extended and released, the piston rod 4 is pushed to move in the reverse direction of the needle inserting direction, so that negative pressure is generated in the needle cylinder 2.
According to the technical scheme of the embodiment of the invention, the button 8 is arranged on the outer surface of the needle cylinder 2, the finger presses the button 8, the contact 81 presses the front end of the trigger lever 7, so that the trigger lever 7 rotates around the fulcrum 71, the rear end is lifted, the rear hook 72 positioned at the rear end of the trigger lever 7 is unhooked from the front hook 61 of the locking connecting rod 6, the piston rod 4 is ejected towards the reverse direction of the needle inserting direction under the action of the elastic force of the spring, the operation is convenient, the single-hand operation is suitable, and the biopsy sampling work of doctors is facilitated.
The above-described embodiments should not be construed as limiting the scope of the invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions can occur, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A negative pressure biopsy needle comprising an inner needle (3) and an outer needle (1), characterized in that it further comprises a needle cylinder (2), a piston rod (4), wherein:
the needle seat of the outer needle (1) is connected with the front end of the needle cylinder (2);
the inner needle (3) is fixedly connected with the front end of the piston rod (4);
the front end of the piston rod (4) is positioned in the needle cylinder (2) and can slide in the needle cylinder (2) in a needle inserting direction; the negative pressure can be formed in the needle cylinder (2) by pulling the piston rod (4) in the reverse direction of the needle inserting direction;
the negative pressure spring (5) is arranged between the rear end of the piston rod (4) and the needle cylinder (2), and the elastic force direction of the negative pressure spring (5) is the direction of the rear end of the piston rod (4) far away from the needle cylinder (2);
before triggering, the rear end of the piston rod (4) is connected to the needle cylinder (2); the negative pressure biopsy needle further comprises a trigger mechanism, and the trigger mechanism can disconnect the rear end of the piston rod (4) from the needle cylinder (2) after being triggered, so that the rear end of the piston rod (4) is far away from the needle cylinder (2), and negative pressure is formed in the needle cylinder (2).
2. The negative pressure biopsy needle of claim 1, wherein the trigger mechanism comprises a button (8), a trigger lever (7), a locking link (6), wherein:
the locking connecting rod (6) is positioned on the outer surface of the needle cylinder (2), and the rear end of the locking connecting rod (6) is fixedly connected with the rear end of the piston rod (4);
the front end of the locking connecting rod (6) is provided with a front hook (61), the rear end of the trigger lever (7) is provided with a rear hook (72), the middle part of the trigger lever (7) is provided with a fulcrum (71), and the front hook (61) and the rear hook (72) are hooked together before triggering;
the button (8) is arranged on the outer surface of the needle cylinder (2), the button (8) is pressed, the button (8) touches the front end of the trigger lever (7), the rear end of the trigger lever (7) moves towards the direction far away from the outer surface of the needle cylinder (2), and therefore the front hook (61) and the rear hook (72) are unhooked.
3. The negative pressure biopsy needle according to claim 2, wherein an elastic support (11) is provided between the front end of the trigger lever (7) and the outer surface of the needle cylinder (2), and the elasticity of the elastic support (11) causes the front hook (61) and the rear hook (72) to approach each other.
4. Negative pressure biopsy needle according to claim 3, wherein the elastic support (11) is a spring, the two ends of which respectively abut against the outer surface of the needle cylinder (2) and the trigger lever (7).
5. The negative pressure biopsy needle according to claim 3, wherein the elastic support (11) comprises a support body (111) and a first elastic arm (112) and a second elastic arm (113) extending from the support body (111) to the front side and forming an included angle; wherein:
the first elastic arm (112) is propped against the outer surface of the needle cylinder (2), the end part of the second elastic arm (113) is propped against the trigger lever (7), and the first elastic arm (112) and the second elastic arm (113) have elastic forces which are far away from each other;
the button (8) is pressed, the rear end of the button (8) presses the front end of the trigger lever (7), the trigger lever (7) approaches to the needle cylinder (2), the free end of a second elastic arm (113) close to the trigger lever (7) is pressed to the needle cylinder (2), the trigger lever (7) rotates around a fulcrum (71), the rear end of the trigger lever is lifted, and a rear hook (72) located at the rear end of the trigger lever (7) is unhooked from a front hook (61) of the locking connecting rod (6).
6. The negative pressure biopsy needle according to claim 2, wherein a button spring (12) is arranged between the button (8) and the outer surface of the needle cylinder (2).
7. The negative pressure biopsy needle according to any one of claims 2 to 6, wherein the outer surface of the needle cylinder (2) is provided with a guide groove (10) extending axially along the needle cylinder (2), and the locking link (6) is located in the guide groove (10).
8. The negative pressure biopsy needle according to claim 7, wherein the negative pressure biopsy needle further comprises a fixture block (9), the fixture block (9) is fixedly connected to the rear wall of the needle cylinder (2), a blocking portion (91) is arranged on the fixture block (9) and close to the center of the needle cylinder (2), and the blocking portion (91) blocks on a route of the piston rod (4) going in the reverse direction of the needle insertion direction.
9. The negative pressure biopsy needle according to claim 1, wherein the needle holder of the outer needle (1) is non-detachably connected to the front end of the needle cylinder (2).
10. The negative pressure biopsy needle according to claim 1, wherein the inner needle (3) is a solid needle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211206963.8A CN115414077A (en) | 2022-09-30 | 2022-09-30 | Negative pressure biopsy needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211206963.8A CN115414077A (en) | 2022-09-30 | 2022-09-30 | Negative pressure biopsy needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115414077A true CN115414077A (en) | 2022-12-02 |
Family
ID=84205807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211206963.8A Pending CN115414077A (en) | 2022-09-30 | 2022-09-30 | Negative pressure biopsy needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115414077A (en) |
-
2022
- 2022-09-30 CN CN202211206963.8A patent/CN115414077A/en active Pending
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