CN112525584A

CN112525584A - Sampling device

Info

Publication number: CN112525584A
Application number: CN202011355811.5A
Authority: CN
Inventors: 赵亚洲; 赵磊; 全丽华
Original assignee: Kangmai Technology Suzhou Co ltd
Current assignee: Kangmai Technology Suzhou Co ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-03-19

Abstract

The invention relates to the field of puncture sampling, and discloses a sampling device, wherein the sampling device comprises a cylinder body (1), a piston (2) arranged in the cylinder body (1), a torque output part (3) integrated on the piston (2), an inner needle tube (4) and an outer needle tube (5), the cylinder body (1) comprises a first end cover (11) which is positioned at the first end of the cylinder body and is provided with a first through hole, the inner needle tube (4) is connected to the torque output part (3) and penetrates through the first through hole, and the outer needle tube (5) is connected to the outer side of the first end cover (11) and is used for accommodating the inner needle tube (4) to be inserted. Through the technical scheme, the torque output part is integrated on the piston, so that the integration level can be improved, the whole size is reduced, the portability is improved, and the operation is more flexible.

Description

Sampling device

Technical Field

The invention relates to the field of puncture sampling, in particular to a sampling device.

Background

The sampling device may be used to obtain a sample in a sample, for example to obtain small amounts of tissue cells in a biological tissue.

The sampling device comprises a sampling needle and a power mechanism for driving the sampling needle, wherein the power mechanism comprises a pneumatic cylinder and a pneumatic motor so as to respectively drive the sampling needle to move linearly and rotate.

Due to the presence of the two driving parts, the overall size of the sampling device is relatively large, inconvenient to operate, and poor in portability.

Disclosure of Invention

The invention aims to provide a sampling device to solve the problem of large size.

In order to achieve the above object, the present invention provides a sampling device, wherein the sampling device comprises a cylinder, a piston arranged in the cylinder, a torque output member integrated on the piston, an inner needle tube and an outer needle tube, the cylinder comprises a first end cap with a first through hole at a first end thereof, the inner needle tube is connected to the torque output member and passes through the first through hole, and the outer needle tube is connected to the outside of the first end cap and accommodates the inner needle tube to be inserted.

Optionally, the free end of the outer needle cannula is a closed tip and a side window is formed in the sidewall of the outer needle cannula.

Optionally, the cylinder body is provided with a liquid pipeline which extends to the first through hole and is communicated with the gap between the outer needle tube and the inner needle tube.

Optionally, the cylinder body is provided with a first power pipeline communicated with the interior of the cylinder body and a second power pipeline connected with the torque output piece.

Optionally, the cylinder includes a second end cap at a second end thereof, the first and second power lines being disposed on the second end cap.

Optionally, the second end cap is formed with a second through hole capable of receiving the inner needle tube therethrough.

Optionally, the sampling device further comprises a collection chamber connected to the cylinder body and a negative pressure pipeline connected to the collection chamber, and the inner needle tube can extend into the collection chamber.

Optionally, the inner needle cannula includes a first section connected to the torque output member and extending through the first endcap and a second section extending through the second endcap, the first section rotatably connected to the second section, and the second endcap restricting relative rotation of the second section.

Optionally, the first power line and the second power line are both gas lines, and the torque output member is a pneumatic motor.

Optionally, an elastic member is disposed between the piston and the first end cap.

Optionally, the outer needle tube comprises a main body part, a tapered part and a smooth top part which are sequentially arranged along the length direction, and the smooth top part is formed into a smooth convex surface.

Through the technical scheme, the torque output part is integrated on the piston, so that the integration level can be improved, the whole size is reduced, the portability is improved, and the operation is more flexible.

Drawings

FIG. 1 is a cross-sectional view of a sampling device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a sampling device incorporating another embodiment of the present invention.

Description of the reference numerals

1 cylinder and 2 piston

3 torque output 4 inner needle tube

5 outer needle tube 6 negative pressure pipeline

7 collecting bin 8 elastic part

9 first power line 10 second power line

11 first end cap 12 second end cap

13 side window 14 liquid pipeline

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

The invention provides a sampling device, which comprises a cylinder body 1, a piston 2 arranged in the cylinder body 1, a torque output part 3 integrated on the piston 2, an inner needle tube 4 and an outer needle tube 5, wherein the cylinder body 1 comprises a first end cover 11 with a first through hole at a first end, the inner needle tube 4 is connected to the torque output part 3 and penetrates through the first through hole, and the outer needle tube 5 is connected to the outer side of the first end cover 11 and accommodates the inner needle tube 4 to be inserted.

The piston 2 can move in the cylinder 1 along the length direction of the cylinder 1, and the movement of the piston 2 can be realized by injecting pressure fluid, such as hydraulic oil or pressurized gas, into the cylinder 1; a torque output piece 3 is integrated on the piston 2, and the torque output piece 3 can be positioned inside the piston 2 or connected to the outside of the piston 2; the torque output piece 3 can be connected with an inner needle tube 4 in a transmission way, and the inner needle tube 4 penetrates through the first end cover 11 of the cylinder body 1 and extends to the outside so as to be convenient for sampling; the first cap 11 is further connected to an outer needle tube 5, and the inner needle tube 4 is inserted into the outer needle tube 5 to puncture a sample such as a human tissue through the outer needle tube 5.

The torque output member 3 may include a rotor, and the center axis of the rotor may coincide with the center axis of the cylinder 1, and the center axes of the inner needle tube 4 and the outer needle tube 5 coincide with the center axis of the rotor.

In this embodiment, the pressure cylinder formed by the piston 2 and the cylinder body 1 can make the torque output member 3, i.e. the inner needle tube 4, move linearly, and the torque output member 3 can drive the inner needle tube 4 to rotate, and the inner needle tube 4 can perform a corresponding sampling operation by moving linearly and rotating, which will be described in detail below.

In this scheme, moment of torsion output 3 is integrated on piston 2, can improve holistic integrated level, reduces the size, has better portability, and the nimble operation of being convenient for.

Wherein, the free end of the outer needle tube 5 is a closed tip, and a side window 13 is formed on the side wall of the outer needle tube 5. The tip of the outer needle tube 5 can facilitate the penetration of a sample, such as biological tissue (human tissue), while the side window 13 can allow the sample to enter the inside of the outer needle tube 5, the sample entering the outer needle tube 5 can be cut off when the inner needle tube 4 moves linearly in the outer needle tube 5, and the torque output member 3 drives the inner needle tube 4 to rotate, so that the sample can be cut off more easily.

In addition, the cylinder 1 is provided with a fluid line 14 extending to the first through hole and communicating with the gap between the outer needle tube 5 and the inner needle tube 4. The fluid line 14 may inject a washing fluid, a sterilization fluid, etc., such as a physiological saline, between the inner needle tube 4 and the outer needle tube 5, the washing fluid may be injected into the sample along the outer needle tube 5 to wash the sample, such as a target human tissue, and the washing fluid may also be introduced into the collection chamber 7 described below along the inner needle tube 4 to wash the obtained sample. The liquid line 14 may comprise a first portion extending along the side wall of the cylinder 1 and a second portion extending in the first end cap 11. As shown in fig. 2, a first portion of the liquid line may extend from the second end to the first end of the side wall of the cylinder 1, and the first end cap 11 may have a larger thickness to accommodate a second portion of the liquid line 14.

In addition, the cylinder block 1 is provided with a first power line 9 communicating with the inside of the cylinder block 1 and a second power line 10 connected to the torque output member 3. The first power line 9 may be a pipe for conveying pressurized gas or liquid, and the second power line 10 may be a pipe for conveying pressurized gas or liquid, a pipe for conveying fuel, or a wire for conveying electric power.

Wherein the cylinder 1 comprises a second end cap 12 at a second end thereof, the first power line 9 and the second power line 10 being arranged on the second end cap 12. The first power line 9 can be communicated with the inside of the cylinder 1 to directly inject gas or liquid into the cylinder 1 to drive the piston 2 to move, and the second power line 10 can pass through the second end cover 12 and extend from the cylinder 1 to the torque output part 3. The second end cap 12 may have a large thickness and be formed with a cavity in which the first power line 9 and the second power line 10 may be disposed, and the second power line 10 may be extended or retracted from the cavity to accommodate the distance of the piston 2 from the second end cap 12 when the piston 2 moves. Of course, in other embodiments, the first power line 9 and the second power line 10 may be provided on a side wall of the cylinder block 1, the first power line 9 may be communicated with the cylinder block 1 through the side wall, and the second power line 10 may be connected to the torque output member 3 through the side wall.

In addition, the second end cap 12 is formed with a second through hole capable of receiving the inner needle tube 4 therethrough. The inner needle cannula 4 may be adapted to be inserted into a sample object at one end through the first end cap 11 and may be coupled to a sample storage device, such as a collection chamber 7 described below, at the other end through a second aperture in the second end 12. The inner needle tube 4 may pass coaxially through the rotor of the torque output member 3.

Further, the sampling device further comprises a collection chamber 7 connected to the cylinder body 1 and a negative pressure pipeline 6 connected to the collection chamber 7, and the inner needle tube 4 can extend into the collection chamber 7. Through a second through hole in the second end cap 12, it can communicate with the collection chamber 7, and the inner needle tube 4 can be inserted into the collection chamber 7 through the second through hole to guide the taken sample into the collection chamber 7. In addition, the negative pressure pipeline 6 can form a negative pressure environment in the collection bin 7 to suck the sample into the collection bin 7.

Optionally, the inner needle cannula 4 includes a first section connected to the torque output member 3 and extending through the first end cap 11, the first section being rotatably connected to the second section, and a second section extending through the second end cap 12, the second end cap 12 limiting relative rotation of the second section. The second section may only move axially relative to the second end cap 12, but not rotate relative to it, to improve the seal between the two; the first section moves linearly together with the torque output member 3 and rotates synchronously with the rotor of the torque output member 3; the first and second segments are relatively rotatable to allow the first segment to follow the rotation of the rotor of the torque output member 3. In other embodiments, the inner needle cannula 4 may be of a one-piece construction, i.e., not the two pieces described above.

Wherein, the first power pipeline 9 and the second power pipeline 10 are both gas pipelines, and the torque output part 3 is a pneumatic motor. That is, the pressure cylinder formed by the cylinder body 1 and the piston 2 may be a cylinder, and the torque output member 3 is a pneumatic motor, both of which are pneumatically driven, so that pneumatic power can be provided by the same gas source, which is convenient for operation and management, and occupies a relatively small space, and particularly, the gas source may use a relatively clean gas, such as an inert gas, and even if the gas pressure leaks, the influence on sampling is small. Of course, in other embodiments, hydraulic oil may also be used as the pressure medium.

In addition, an elastic member 8 is provided between the piston 2 and the first end cap 11. The elastic member 8 may apply an elastic force to the piston 2 so that the piston 2 moves from the first end toward the second end, that is, when the cylinder 1 is not filled with the pressurized gas, the piston 2 may be held at a position close to the second end by the elastic member 8, and when it is desired to move the piston 2 toward the first end, the pressurized gas may be injected into the cylinder 1 to overcome the elastic force of the elastic member 8 to push the piston 2 to move toward the first end. Thereby, the inner needle tube 4 can move synchronously with the plunger 2 to open and close the side window 13 on the outer needle tube 5, and a sample entering the side window 13 can be cut.

Specifically, the outer needle tube 5 includes a main body portion, a tapered portion, and a smooth tip portion, which are sequentially arranged in the longitudinal direction, and the smooth tip portion is formed as a smooth convex surface. The length direction is the length direction of the outer needle tube 5, the main body part can be in a round tube shape and can accommodate the inner needle tube 4, the side window 13 is formed on the main body part, the tapered part is approximately in a cone shape, such as a cone shape or a pyramid shape, and the tapered part has no tip and is connected with the smooth top; the smooth top is a tip for puncturing, and particularly, the tip herein is not in a conventional conical or pyramidal shape but is formed as a smooth convex surface which can be regarded as a surface formed by various smooth curved line rotational scans, for example, a parabola, a hyperbola, a circular arc line, etc., and the smooth top may be a centrosymmetric structure.

The operation of the sampling device according to the preferred embodiment of the present invention will be described below.

Before the sample is pierced, the first power line 9 is connected so that the piston 2 is close to the first end cap 11, the elastic member 8 is in a compressed state, and the inner needle tube 4 closes the side window 13; using the outer needle cannula 5 to penetrate into the sample, the side window 13 may be directed towards the target sample, e.g. diseased tissue in human tissue; the first power line 9 is closed, the elastic piece 8 enables the piston 2 to move to be close to the second end cover 12, the side window 13 is opened to be communicated with the negative pressure pipeline 6, and the sample enters the outer needle tube 5 through the side window 13 under the action of negative pressure; simultaneously opening the first power pipeline 9 and the second power pipeline 10, rotating the inner needle tube 4 at a high speed and moving along the axial direction of the cylinder body 1, and cutting a sample sucked into the side window 13; the cut sample enters a collecting bin 7 under the action of negative pressure; closing the first power pipeline 9 and the second power pipeline 10, opening the side window 13, opening the liquid pipeline 14, injecting cleaning liquid between the inner needle tube 4 and the outer needle tube 5, enabling the cleaning liquid to reach the lesion tissue, and entering the collecting bin 7 under the action of negative pressure to clean the obtained sample; finally the outer needle cannula 5 is withdrawn from the sample.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the specific features in any suitable way, and the invention will not be further described in relation to the various possible combinations in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims

1. The utility model provides a sampling device, its characterized in that, sampling device includes cylinder body (1), sets up piston (2) in cylinder body (1), integrated torque output spare (3), interior needle tubing (4) and outer needle pipe (5) on piston (2), cylinder body (1) is including being located its first end, first end cover (11) that have a first through-hole, interior needle tubing (4) connect in torque output spare (3) and pass first through-hole, outer needle tubing (5) connect in the first end cover (11) outside and hold interior needle tubing (4) insert.

2. A sampling device according to claim 1, characterized in that the free end of the outer needle tube (5) is a closed tip and that a side window (13) is formed in the side wall of the outer needle tube (5).

3. A sampling device according to claim 2, characterized in that the cylinder (1) is provided with a liquid line (14) extending to the first through hole and communicating with the gap between the outer needle tube (5) and the inner needle tube (4).

4. A sampling device according to claim 1, characterized in that the cylinder (1) is provided with a first power line (9) communicating with the interior of the cylinder (1) and a second power line (10) connected to the torque output (3).

5. A sampling device according to claim 4, characterized in that the cylinder (1) comprises a second end cap (12) at its second end, the first power line (9) and the second power line (10) being provided on the second end cap (12).

6. A sampling device according to claim 5, characterized in that the second end cap (12) is formed with a second through hole capable of receiving the inner needle tube (4) therethrough.

7. A sampling device according to claim 6, characterized in that it further comprises a collecting chamber (7) connected to the cylinder (1) and a negative pressure line (6) connected to the collecting chamber (7), the inner needle (4) being extendable into the collecting chamber (7).

8. A sampling device according to claim 7, wherein the inner needle tube (4) comprises a first section connected to the torque output member (3) and extending through the first end cap (11) and a second section extending through the second end cap (12), the first section being rotatably connected to the second section, the second end cap (12) restricting relative rotation of the second section.

9. A sampling device according to claim 4, characterized in that the first power line (9) and the second power line (10) are both gas lines and the torque output (3) is a pneumatic motor.

10. A sampling device according to claim 9, characterized in that an elastic member (8) is arranged between the piston (2) and the first end cap (11).

11. The sampling device according to claim 1, characterized in that the outer needle tube (5) comprises a main body portion, a tapered portion, and a smooth tip portion arranged in this order in a length direction, the smooth tip portion being formed into a smooth convex surface.