CN108784754A - A kind of lung aspiration biopsy device - Google Patents

Abstract

The invention discloses a lung puncture biopsy device, which comprises a needle cylinder, a push rod and a needle body. The inside of the needle cylinder is provided with a first fixing plate and a second fixing plate, and the first fixing plate is installed with a liquid inlet tube and catheter, one end of the liquid inlet tube is installed on the outside of the syringe, the second fixing plate is installed on the side where the first fixing plate is installed, and two fixing sleeves are installed on the second fixing plate cylinder, the inside of the two fixed sleeves are respectively equipped with a first movable rod and a second movable rod, one end of the first movable rod is connected with the end of the liquid inlet pipe by installing the first rubber plug, and the A first compression spring is installed on the outside of the first movable rod, and the two ends of the first compression spring are respectively connected with the first rubber plug and the end face of the fixed sleeve, and the end of the second movable rod far away from the fixed sleeve is installed with a Second rubber stopper. The invention is convenient and quick to use, effectively prevents the sample backflow phenomenon in the sampling process, and can perform multiple samplings at the same time.

Description

A lung biopsy device

technical field

The invention relates to the field of medical equipment, in particular to a lung puncture biopsy device.

Background technique

Lung puncture biopsy is an important measure for the diagnosis and treatment of lung diseases. At present, clinically, the puncture needle is mainly used for puncture under the guidance of a CT detector, and then connected to a syringe for suction. The existing puncture needle has a simple structure and is not used during use. Convenience adds difficulty to medical staff in the operation process.

There are following deficiencies in existing puncture needles:

1. The hollow needle is used for biopsy through negative pressure suction. After the hollow needle sucks the tissue, because the pressure in the cavity is negative pressure, the needle plug is easy to reset and push the tissue out, causing the sample to flow back and increasing the difficulty of sampling.

2. The structure is simple. During the operation, a single puncture can only be sampled once. At the same time, during the sampling process, the volume of the sample is limited by the pulling length of the push rod.

Contents of the invention

The object of the present invention is to provide a lung puncture biopsy device to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the present invention provides the following technical solutions: comprising a syringe, a push rod and a needle body, a first fixing plate and a second fixing plate are arranged inside the syringe, and an advanced fixing plate is installed on the first fixing plate. One end of the liquid inlet pipe is installed on the outside of the syringe, the second fixing plate is installed on the side where the first fixing plate is installed, and two fixing plates are installed on the second fixing plate. Sleeve, the inside of the two fixed sleeves are respectively equipped with a first movable rod and a second movable rod, and one end of the first movable rod is connected with the end of the liquid inlet pipe by installing the first rubber plug, so A first compression spring is installed on the outside of the first movable rod, and the two ends of the first compression spring are respectively connected with the first rubber plug and the end face of the fixed sleeve, and the end of the second movable rod is installed away from the fixed sleeve. There is a second rubber stopper, a second compression spring is installed on the outside of the middle part of the second movable rod through a connecting plate, the other end of the second compression spring is fixedly connected to the side of the first fixing plate, and the inside of the syringe An elastic membrane is installed on one side of the second fixed plate, a liquid discharge pipe is installed on one side of the liquid inlet pipe on the end face of the syringe, a third rubber plug is arranged on the end face of the liquid discharge pipe, and the push rod One end of the push rod is installed inside the syringe, one end of the push rod inside the syringe is fixedly provided with a piston, the other end of the push rod is fixedly provided with a push plate, and the needle body is connected to the end of the liquid inlet pipe through the connector. connect.

Further, the syringe is made of transparent material as a whole.

Further, there are four second compression springs, and the four second compression springs are evenly distributed on the side of the connecting plate.

Further, the end surface of one end of the liquid guide tube is flush with the side of the first fixing plate, and the end surface of the liquid discharge pipe is flush with the inner cylinder wall of the syringe.

Further, a first sealing ring is installed at the connection between the first rubber stopper and the liquid inlet pipe, and at the connection between the second rubber stopper and the catheter.

Further, second sealing rings are installed at the outer connections between the two fixed sleeves and the first movable rod and the second movable rod respectively.

Further, the inner wall of the syringe is fixedly provided with a limit block on the side of the elastic membrane away from the second fixing plate.

Further, the inner thread of the connector is screwed with the outer thread provided at the end of the liquid inlet pipe.

Further, the first rubber plug is tapered on the side away from the first movable rod, and the diameter of the first rubber plug is larger than the diameter of the liquid inlet pipe.

Further, the side of the second rubber stopper close to the second movable rod is set in a tapered shape, and the diameter of the second rubber stopper is larger than the diameter of the catheter.

Compared with prior art, the beneficial effect of the present invention is:

1. By setting the first fixed plate and the second fixed plate, the liquid inlet pipe and the catheter tube are installed on the first fixed plate by opening through holes, and two fixed sleeves are installed on the second fixed plate. The inside of the sleeve is respectively equipped with a first movable rod and a second movable rod. The end of the first movable rod is connected with the end of the liquid inlet pipe by installing the first rubber plug, and the end of the second movable rod is connected by the second movable rod. The rubber stopper is connected to the forehead end, and an elastic membrane is installed on one side of the second fixed plate, and the first movable rod is moved by pulling the push plate to perform sampling. After a single sampling is completed, it can be pressed Push the plate to move the second movable rod, and the sample moves to the side of the first fixed plate away from the second movable plate through the catheter, so that the push plate can be repeatedly pulled and pressed to perform multiple samplings and effectively prevent Sample reflux, convenient and quick to use;

2. By setting the connecting piece at the end of the needle body, the internal thread of the connecting piece is screwed with the external thread at the end of the liquid inlet pipe, thereby effectively preventing the needle body from falling off and facilitating the replacement of different needles. At the same time, the inside of the syringe is provided with a limit block on the side of the elastic membrane away from the second fixing plate. During the process of pressing the push plate, it can effectively prevent the piston from directly contacting the elastic membrane, thereby preventing the elastic membrane from being damaged.

Description of drawings

Fig. 1 is a kind of overall structure schematic diagram of lung biopsy device of the present invention;

Fig. 2 is the enlarged view of place A in Fig. 1 of a kind of lung puncture biopsy device of the present invention;

Fig. 3 is a right view of the first fixing plate of a lung biopsy device of the present invention.

In Fig. 1-3: 1-syringe; 2-push rod; 3-needle body; 4-first fixing plate; 5-second fixing plate; 6-inlet tube; 7-catheter tube; 8-fixation Sleeve; 9-first movable rod; 10-second movable rod; 11-first rubber plug; 12-first compression spring; 13-second rubber plug; 14-second compression spring; 15-elastic film; 16-discharge pipe; 17-the third rubber plug; 18-piston; 19-push plate; 20-limiting block; 21-connector.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 1-3, the present invention provides a technical solution: comprising a syringe 1, a push rod 2 and a needle body 3, the inside of the syringe 1 is provided with a first fixing plate 4 and a second fixing plate 5, so The first fixed plate 4 is equipped with a liquid inlet pipe 6 and a liquid catheter 7, and one end of the liquid inlet pipe 6 is installed on the outside of the syringe 1, and the second fixed plate 5 is installed on the first fixed plate 4. On one side of the second fixed plate 5, two fixed sleeves 8 are installed, and the insides of the two fixed sleeves 8 are respectively equipped with a first movable rod 9 and a second movable rod 10. One end of a movable rod 9 is connected with the end of the liquid inlet pipe 6 by installing the first rubber plug 11, the first compression spring 12 is installed on the outside of the first movable rod 9, and the two ends of the first compression spring 12 They are respectively connected to the end faces of the first rubber stopper 11 and the fixed sleeve 8, and the end of the second movable rod 10 away from the fixed sleeve 8 is equipped with a second rubber stopper 13, and the outside of the middle part of the second movable rod 10 is connected by The plate is equipped with a second compression spring 14, and the other end of the second compression spring 14 is fixedly connected to the side of the first fixed plate 4, and an elastic film is installed on one side of the second fixed plate 5 inside the syringe 1 15. The end face of the syringe 1 is provided with a liquid discharge pipe 16 on one side of the liquid inlet pipe 6, and the end face of the liquid discharge pipe 16 is provided with a third rubber stopper 17, and one end of the push rod 2 is installed on the needle Inside the cylinder 1, one end of the push rod 2 inside the syringe 1 is fixedly provided with a piston 18, and the other end of the push rod 2 is fixedly provided with a push plate 19, and the needle body 3 is connected to the liquid inlet pipe through a connector. Connect at 6 ends.

The syringe 1 is made of transparent material as a whole, which is convenient for observing the volume of the sample inside the syringe 1 from the outside.

The second compression spring 14 is provided with four, and the four second compression springs 14 are uniformly installed on the side of the connecting plate to ensure that the second movable rod 10 is evenly stressed during the movement, so that when the sample is drawn During the process, the sample can be effectively prevented from flowing back from the inside of the syringe 1 .

The end face of one end of the catheter tube 7 is flush with the side of the first fixing plate 4, and the end face of the drain pipe 16 is flush with the inner wall of the syringe 1, so that the sample can be passed smoothly from the first fixing plate 4. One side of the needle tube enters the catheter 7, and can effectively ensure that the sample can be taken out from the inside of the syringe 1 smoothly.

The connection between the first rubber stopper 11 and the liquid inlet pipe 6 and the connection between the second rubber stopper 13 and the catheter tube 7 are equipped with first sealing rings to ensure the tightness of the entire interior of the device and prevent sample backflow.

The two fixed sleeves 8 are connected with the first movable rod 9 and the outer side of the second movable rod 10 respectively with second sealing rings to ensure that the pressure inside the device is stable. The first movable rod 9 and the second movable rod 10 can be smoothly moved.

The inner wall of the syringe 1 is fixed with a limit block 20 on the side of the elastic membrane 15 away from the second fixing plate 5 to limit the position of the piston 18 so as to effectively prevent damage to the elastic membrane 15 .

The inner thread of the connector 21 is screwed with the outer thread provided at the end of the liquid inlet pipe 6 to ensure a stable connection between the needle body 3 and the syringe 1 and facilitate replacement.

The first rubber plug 11 is tapered on the side away from the first movable rod 9 , and the diameter of the first rubber plug 11 is larger than the diameter of the liquid inlet pipe 6 .

The second rubber stopper 13 is tapered on the side close to the second movable rod 10 , and the diameter of the second rubber stopper 13 is larger than that of the catheter tube 7 .

Working principle: when taking a sample, insert the needle body 3 into the patient's body, pull it to the side away from the syringe 1 through the push rod 2 and the push plate 19, thereby reducing the pressure between the piston 18 and the elastic membrane 15, And the elastic membrane 15 is close to the piston 18 side, and in the process of pulling, due to the pressure difference, the first movable rod 9 and the second movable rod 10 all move to the side close to the elastic membrane 15, and the first movable rod 9 In the process of moving, the first compression spring 12 is compressed, and then the sample in the body enters between the first fixed plate 4 and the second fixed plate 5 through the liquid inlet tube 6, and at the same time, because the end of the second movable rod 10 is in the guide The outer side of the liquid pipe 7 is provided with a second rubber stopper 13, and then the second movable rod 10 will not move at this time, which ensures that in the process of pulling the push rod 2, sampling can be continued. Under the action of a compression spring 12, the first movable rod 9 and the first rubber stopper 11 are reset. After a single sampling is completed, the push plate 19 is pressed toward the end close to the syringe 1, thereby increasing the gap between the elastic film 15 and the piston 18. At this time, the first movable rod 9 will not move, and the second movable rod 10 will move to the end away from the elastic membrane 15, so that the sample between the first fixed plate 4 and the second fixed plate 5 passes through the catheter 7 Move to the side of the first fixed plate 4 close to the discharge pipe 16, repeatedly pull and press the push plate 19, and then perform multiple samplings, and at the same time effectively prevent the sample from flowing back. After the sampling is completed, open the third rubber Plug 17, take out the sample inside the syringe 1.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. any such actual relationship or order exists between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or apparatus.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (10)

1. a kind of lung aspiration biopsy device, including syringe (1), push rod (2) and needle body (3), it is characterised in that：The syringe (1) Be internally provided with the first fixed plate (4) and the second fixed plate (5), be equipped on first fixed plate (4) inlet tube (6) and Catheter (7), one end of the inlet tube (6) are mounted on the outside of syringe (1), and second fixed plate (5) is mounted on installation The side of first fixed plate (4), installation is there are two fixes sleeve (8) on second fixed plate (5), the fixing sleeve described in two The inside of cylinder (8) is separately installed with the first motion bar (9), the second motion bar (10), and one end of first motion bar (9) passes through It installs and is connect at the first rubber stopper (11) and the end of inlet tube (6), the first compression is installed on the outside of first motion bar (9) The both ends of spring (12), first compressed spring (12) connect with the end face of the first rubber stopper (11), fixes sleeve (8) respectively It connects, the one end of second motion bar (10) far from fixes sleeve (8) is equipped with the second rubber stopper (13), second motion bar (10) the second compressed spring (14) is equipped with by connecting plate on the outside of middle part, the other end of second compressed spring (14) with The side of first fixed plate (4) is fixedly connected, and the inside of the syringe (1) is flexible in the installation of the side of the second fixed plate (5) The end face of film (15), the syringe (1) is equipped with drain pipe (16), the end of the drain pipe (16) in the side of inlet tube (6) Face is provided with third rubber stopper (17), and one end of the push rod (2) is mounted on the inside of syringe (1), and the push rod (2) is in syringe (1) internal one end is fixedly installed piston (18), and the other end of the push rod (2) is fixedly installed push plate

(19), the needle body (3) at connector and inlet tube (6) end by connecting.

2. a kind of lung aspiration biopsy device according to claim 1, it is characterised in that：The syringe (1) is integrally using transparent Material is made.

3. a kind of lung aspiration biopsy device according to claim 1, it is characterised in that：Second compressed spring (14) setting There are four, the second compressed spring (14) described in four is uniformly mounted on the side of connecting plate.

4. a kind of lung aspiration biopsy device according to claim 1, it is characterised in that：The end face of described catheter (7) one end Concordant with the side of the first fixed plate (4), the end face of the drain pipe (16) is concordant with the inside barrel of syringe (1).

5. a kind of lung aspiration biopsy device according to claim 1, it is characterised in that：First rubber stopper (11) and feed liquor Junction, the second rubber stopper (13) and the junction of catheter (7) for managing (6) are mounted on the first sealing ring.

6. a kind of lung aspiration biopsy device according to claim 1, it is characterised in that：Fixes sleeve (8) point described in two Outside junction not with the first motion bar (9), the second motion bar (10) is mounted on the second sealing ring.

7. a kind of lung aspiration biopsy device according to claim 1, it is characterised in that：The inside barrel of the syringe (1) exists Side of the elastic membrane (15) far from the second fixed plate (5) is fixedly installed limited block (20).

8. a kind of lung aspiration biopsy device according to claim 1, it is characterised in that：The inside of the connector (21) passes through Internal thread is set and the external screw thread of outside setting at inlet tube (6) end screws.

9. a kind of lung aspiration biopsy device according to claim 1, it is characterised in that：First rubber stopper (11) is far from the One motion bar (9) side is set as taper, and the diameter of first rubber stopper (11) is more than the diameter of inlet tube (6).

10. a kind of lung aspiration biopsy device according to claim 1, it is characterised in that：Second rubber stopper (13) is close The side of second motion bar (10) is set as taper, and the diameter of second rubber stopper (13) is more than the diameter of catheter (7).