CN204181655U - A kind of tumor tissue biopsy puncture needle - Google Patents

Abstract

The utility model discloses a tumor tissue biopsy puncture needle, which belongs to the technical field of medical devices. The tumor tissue biopsy puncture needle mainly includes a negative pressure cylinder, a piston rod, a piston, a cylindrical plastic body, a circular push-pull handle, a puncture needle, Sleeve; the negative pressure cylinder is set on the upper part of the cylindrical plastic body, the negative pressure cylinder is provided with a piston and a piston rod, the sleeve is fixed on the lower part of the cylindrical plastic body, and the puncture needle includes a hollow needle tube and a core The needle, the circular push-pull handle is fixedly connected with the core needle, and the hollow needle tube is sleeved on the circular push-pull handle. The utility model cuts the diseased tissue by rotation, can accurately sample, and avoids the transfer of tumor cells caused by the falling of the obtained tissue, can ensure that the negative pressure in the negative pressure cylinder does not decrease, ensures successful sampling, and can avoid damage to the skin tissue caused by multiple punctures. Damage and pollution can also be increased, and at the same time, the utility model also has the advantages of simple structure, convenient operation and strong practicability.

Description

A kind of tumor tissue biopsy puncture needle

technical field

The utility model belongs to the technical field of medical instruments, in particular to a tumor tissue biopsy puncture needle.

Background technique

Tumors are a serious threat to human health. Accurately diagnosing the nature of tumors is of great significance to the treatment of tumors. At present, it has become a common method to extract some tissues with biopsy needles for inspection.

The traditional puncture needle uses a hook needle to hook out the diseased tissue, but the effect of this method is not very satisfactory, and often the diseased tissue is not taken out, which affects the success rate of biopsy puncture. When taking samples, use negative pressure suction. As long as the medical staff relax a little and the negative pressure is reduced, it is easy to squeeze out the removed tissue. Difficulty of operation.

When the traditional puncture needle penetrates into and pulls out the human body, the edge of the side hole on the puncture needle will scrape the skin tissue, causing damage to the skin tissue. If one puncture is unsuccessful or the sampling volume is small, multiple punctures are required , so that the puncture needle will repeatedly damage the skin and increase the pain of the patient. Most of the sampling slots of traditional puncture needles have a small volume of the sampling slot, and the lesion tissue to be taken is small, which is not ideal. Multiple punctures are required to improve the sampling pass rate, which invisibly increases the pain of the patient.

Therefore, it is necessary to improve the existing puncture needle for tumor tissue biopsy, so that the improved puncture needle for tumor tissue biopsy can improve the success rate of biopsy puncture and improve the qualified rate of sampling.

Contents of the invention

In order to overcome the problems existing in the prior art, the utility model provides a puncture needle for tumor tissue biopsy, which can improve the success rate of biopsy puncture, increase the sampling volume, avoid the decrease of the negative pressure in the puncture needle, and prevent the obtained tissue from falling , causing tumor cell metastasis, reducing the work difficulty of medical staff, and reducing damage and pollution to skin tissue.

In order to achieve the above object, the utility model is realized through the following technical scheme: the tumor tissue biopsy puncture needle mainly includes a negative pressure cylinder, a piston rod, a piston, a cylindrical plastic body, a circular push-pull handle, a puncture needle, and a cannula. The above negative pressure cylinder is arranged on the upper part of the cylindrical plastic body, the negative pressure cylinder and the cylindrical plastic body are connected as a whole, the upper part of the negative pressure cylinder is provided with a negative pressure cylinder handle, and the negative pressure cylinder is provided with a piston and a piston rod. A negative pressure chamber is formed between the piston and the cylindrical plastic body, the piston rod is provided with a piston handle, and the center of the piston rod and the cylindrical plastic body is a hollow cavity, and the sleeve is fixed on the cylinder through the sleeve fixing seat. The lower part of the plastic body, the puncture needle passes through the hollow cavity and sleeve of the piston rod and the cylindrical plastic body, the puncture needle includes a hollow needle tube and a core needle with an oblique cut at the front end, and a side hole is provided at the front of the hollow needle tube, There is a core needle inside the hollow needle tube. The front end of the core needle is a slope corresponding to the oblique incision of the hollow needle tube. The handle is fixedly connected with the core needle, the hollow needle tube is sleeved on the circular push-pull handle, and a rotary handle is arranged on the hollow needle tube close to the circular push-pull handle.

The piston rod is provided with a connecting shaft, the connecting shaft is provided with a telescopic support arm, and the handle of the negative pressure cylinder is provided with a groove.

There are two side holes and sampling grooves on the puncture needle, symmetrical left and right, dislocation distribution up and down, the edges of the side holes are all made of sharp blades, the bottom surface of the sampling groove is an arc surface, and the cross section is crescent-shaped.

The hollow needle tube of the puncture needle is marked with a puncture depth mark scale, and a positioning mark block is provided on the circular push-pull handle.

Beneficial effects of the utility model: the utility model cuts the diseased tissue by rotation, can accurately sample, and avoids the transfer of tumor cells caused by the falling of the obtained tissue, and ensures that the negative pressure in the negative pressure cylinder does not decrease through the telescopic support arm, ensuring successful sampling , It is also convenient for medical staff to perform other operations. The use of cannula can avoid the damage and pollution of skin tissue caused by multiple punctures, and it can also obtain tissues at different positions at the same time, increasing the sampling volume. At the same time, the utility model also has the advantages of simple structure, convenient operation and strong practicability.

Description of drawings

Fig. 1 is the utility model sectional structure schematic diagram;

Fig. 2 is a schematic diagram of the structure of the puncture needle of the present invention before sampling;

Fig. 3 is a schematic diagram of the structure of the puncture needle of the present invention after sampling;

Fig. 4 is the structural representation of the utility model;

Fig. 5 is a schematic cross-sectional view of the sampling tank of the present invention.

In the figure, 1-negative pressure cylinder, 2-negative pressure cylinder handle, 3-piston rod, 4-piston, 5-cylindrical plastic body, 6-piston handle, 7-circular push-pull handle, 8-positioning mark block, 9- -puncture needle, 10-rotating handle, 11-suction hole, 12-cannula holder, 13-cannula, 14-connecting shaft, 15-telescopic support arm, 16-hollow needle tube, 17-core needle, 18-side Hole, 19-sampling slot, 20-groove.

Detailed ways

In order to make the purpose, technical solutions and beneficial effects of the present utility model clearer, the preferred embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings, so as to facilitate the understanding of technical personnel.

As shown in Figure 1, the utility model discloses a tumor tissue biopsy puncture needle, and its technical scheme is: the tumor tissue biopsy puncture needle mainly includes a negative pressure cylinder 1, a piston rod 3, a piston 4, and a cylindrical plastic body 5 , a circular push-pull handle 7, a puncture needle 9, a sleeve 13, the negative pressure cylinder 1 is arranged on the top of the cylindrical plastic body 5, the negative pressure cylinder 1 and the cylindrical plastic body 5 are connected as a whole, the negative pressure cylinder 1 The upper part is provided with a negative pressure cylinder handle 2, and the negative pressure cylinder 1 is provided with a piston 4 and a piston rod 3. The negative pressure chamber is formed between the piston 4 and the cylindrical plastic body 5, and the piston rod 3 is provided with a piston handle 6, by pulling the piston handle 6, negative pressure can be formed in the puncture needle 9, and the centers of the piston rod 3 and the cylindrical plastic body 5 are hollow cavities. There is a connecting shaft 14, a telescopic arm 15 is arranged on the connecting shaft 14, a groove 20 is arranged on the negative pressure barrel handle 2, when the piston handle 6 is pulled to make the negative pressure of the puncture needle 9 reach a certain level, the tissue is sucked into the sampling groove 19 When in the middle, the telescopic support arm 15 can be elongated and shortened as required, and the telescopic support arm 15 can be placed in the groove 20 to avoid the pressure reduction due to looseness, and also enable medical personnel to perform other operations at the same time. As preferably, the sleeve 13 is fixed on the lower part of the cylindrical plastic body 5 through the sleeve fixing seat 12, and the puncture needle 9 passes through the hollow cavity and the sleeve 13 of the piston rod 3 and the cylindrical plastic body 5. When sampling A part of the cannula 13 is inserted into the human body, and a part is left outside the body. After the sampling is completed, the puncture needle 9 can be pulled out, and can be inserted in situ along the hollow cavity and the cannula 13 when re-sampling, so as to avoid damage to the skin tissue caused by repeated sampling and insertion. It can better ensure that the orientation of the insertion remains unchanged.

As preferably, as shown in Fig. 2 and Fig. 3, the puncture needle 9 includes a hollow needle tube 16 and a core needle 17 with an oblique incision at the front end. The front part of the hollow needle tube 16 is provided with a side hole 18, and the corresponding negative pressure The cavity position is provided with an air extraction hole 11, which can form a negative pressure in the hollow needle tube 16, and a core needle 17 is arranged inside the hollow needle tube 16. A sampling groove 19 is provided, and the side hole 18 and the sampling groove 19 on the puncture needle 9 are two, left and right symmetrical, distributed up and down, so as to ensure that tissues of different depths and directions can be taken out in one sampling. The edges are all made into sharp blades. As shown in Figure 5, the bottom surface of the sampling tank 19 is a circular arc surface, and the cross section is crescent-shaped, so that the volume of the sampling tank 19 increases, and the circular push-pull handle 7 is fixed to the core needle 17. connection, the hollow needle tube 16 is sleeved on the circular push-pull handle 7, and a rotating handle 10 is provided on the hollow needle tube 16 close to the circular push-pull handle 7. When the puncture needle 9 reaches the sampling position, the piston handle 6 is pulled to form a Negative pressure makes the tissue around the puncture needle 9 suck into the sampling groove 19 on the core needle 17 through the side hole 18 on the hollow needle tube 16, so that the circular push-pull handle 7 does not move, and the rotating handle 10 is pulled to rotate clockwise 90° , the cutting edge of the side hole 18 sandwiches the tissue cutting between the sampling groove 19 and the hollow needle tube 16, pulls the puncture needle 9 out of the human body, and removes the hollow needle tube 16 from the circular push-pull handle 7 to obtain the obtained tissue , to complete a puncture sampling process. The hollow needle tube 16 of the puncture needle 9 is marked with a puncture depth marking scale to determine the depth of tissue sampling, and a positioning mark block 8 is provided on the circular push-pull handle 7, which marks the sampling on the core needle 17 of the puncture needle 9. slot 19 opening direction.

The working process of the utility model: the cannula 13 and the puncture needle 9 are penetrated into the human body at the same time, so that part of the cannula 13 remains outside the body, one hand holds the negative pressure cylinder 1, and the other hand pushes the circular push-pull handle 7 , so that the puncture needle 9 goes deeper into the tissue to be sampled, and the piston handle 6 is pulled to cause negative pressure in the puncture needle 9, and the tissue is sucked into the sampling groove 19 through the side hole 18, and the telescopic support arm 15 is placed on the negative pressure cylinder In the groove 20 on the handle 2, keep the pressure constant, then keep the circular push-pull handle 7 still, pull the rotating handle 10 to rotate clockwise 90°, the tissue will be cut by the side hole 18 and left in the hollow needle tube 16 and the sampling groove 19, the puncture needle 9 is extracted from the hollow cavity and the sleeve 13 of the piston rod 3 and the cylindrical plastic body 5, and the hollow needle tube 16 is removed from the circular push-pull handle 7 to obtain the obtained tissue, and the In a sampling process, if re-sampling is required, the hollow cavity and the sleeve 13 can be inserted again for sampling. If no sampling is required, the sleeve 13 and the puncture needle 9 can be taken out at the same time. The tissue sampling depth can be determined according to the puncture depth marking scale marked on the hollow needle tube 16, and the opening direction of the sampling groove 19 on the core needle 17 of the puncture needle 9 can be determined through the positioning marking block 8 on the circular push-pull handle 7.

The utility model cuts the diseased tissue by rotation, can accurately sample, and avoids the transfer of tumor cells caused by the falling of the obtained tissue, ensures that the negative pressure in the negative pressure cylinder does not decrease through the telescopic support arm, ensures successful sampling, and is also convenient for medical personnel to carry out other tasks. Operation, the use of cannula can avoid the damage and pollution of skin tissue caused by multiple punctures, and can also obtain tissues at different positions at the same time, increasing the sampling volume. At the same time, the utility model also has the advantages of simple structure, convenient operation and strong practicability.

Finally, it is noted that the above preferred embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that it can be described in the form Various changes can be made in the above and in the details without departing from the scope defined by the claims of the present invention.

Claims (4)

1. A puncture needle for tumor tissue biopsy, characterized in that: the puncture needle for tumor tissue biopsy mainly includes a negative pressure cylinder, a piston rod, a piston, a cylindrical plastic body, a circular push-pull handle, a puncture needle, and a sleeve; The negative pressure cylinder is set on the upper part of the cylindrical plastic body, the negative pressure cylinder and the cylindrical plastic body are connected as a whole, the upper part of the negative pressure cylinder is provided with a negative pressure cylinder handle, and the negative pressure cylinder is provided with a piston and a piston rod. A negative pressure chamber is formed between the piston and the cylindrical plastic body. The piston rod is provided with a piston handle, and the center of the piston rod and the cylindrical plastic body is a hollow cavity. The sleeve is fixed on the cylindrical plastic body through the sleeve fixing seat. The lower part of the body, the puncture needle passes through the hollow cavity and sleeve of the piston rod and the cylindrical plastic body, the puncture needle includes a hollow needle tube and a core needle with an oblique incision at the front end, and a side hole is provided at the front of the hollow needle tube, and the hollow There is a core needle inside the needle tube, and the front end of the core needle is an inclined surface corresponding to the oblique cut of the hollow needle tube. It is fixedly connected with the core needle, the hollow needle tube is sleeved on the circular push-pull handle, and a rotating handle is provided on the hollow needle tube close to the circular push-pull handle. 2. A tumor tissue biopsy puncture needle according to claim 1, characterized in that: the piston rod is provided with a connecting shaft, the connecting shaft is provided with a telescopic support arm, and the negative pressure cylinder handle is provided with a groove . 3. A puncture needle for tumor tissue biopsy as claimed in claim 1, characterized in that: the puncture needle has two side holes and two sampling grooves, which are left-right symmetrical, distributed up and down, and the edges of the side holes are evenly spaced. Made into a sharp blade, the bottom surface of the sampling tank is a circular arc surface, and the cross section is crescent-shaped. 4. A tumor tissue biopsy puncture needle according to claim 1, characterized in that: the hollow needle tube of the puncture needle is marked with a puncture depth mark scale, and a positioning mark block is provided on the circular push-pull handle.