CN212037605U

CN212037605U - Orthopedic puncture biopsy trocar with barb thread head and needle core

Info

Publication number: CN212037605U
Application number: CN202020330498.9U
Authority: CN
Inventors: 冯均伟
Original assignee: Sichuan Provincial Peoples Hospital
Current assignee: Sichuan Provincial Peoples Hospital
Priority date: 2020-03-17
Filing date: 2020-03-17
Publication date: 2020-12-01
Anticipated expiration: 2030-03-17

Abstract

The utility model discloses a puncture biopsy trocar with an agnail thread core for department of orthopaedics, which comprises a sleeve, a positioning needle and a biopsy needle core, wherein the sleeve comprises a butt joint plate at the tail end, and the head end of the sleeve is of a zigzag structure; the positioning needle comprises a positioning handle; the biopsy needle core comprises a holding handle at the upper part, a needle body matched with the sleeve is arranged at the lower part of the holding handle, a threaded needle head is arranged at the lower end of the needle body, and the thread tooth shape of the threaded needle head is a triangle with threads and the bottom surface of the adjacent upper side forming an acute angle. The utility model discloses can solve the problem that the biopsy needle of puncture is difficult to effectively draw pathological change tissue among the prior art, simple structure, good reliability, security are good.

Description

Orthopedic puncture biopsy trocar with barb thread head and needle core

Technical Field

The utility model relates to an orthopedics puncture equipment, concretely relates to barb screw thread head core orthopedics puncture biopsy trocar.

Background

The orthopaedics aspiration biopsy is a common technique that a focus specimen is taken out for pathological examination to further make definite diagnosis by applying a puncture technique with small wound for clinically obtaining the focus specimen such as deep bone tissue and the like. Often, after the focus is positioned, the operation is carried out by penetrating a puncture biopsy needle into a focus area to obtain a sample of a lesion part.

However, the problems often encountered with this procedure are: after the hollow needle biopsy needle reaches a lesion part, even if lesion tissues are inserted into the needle tube cavity, a tissue block is easy to withdraw from the needle tube when the needle is taken, the target lesion tissues are difficult to take out, or the taken tissues are few; the operation is repeated, which increases the operation time and the pain of the patient, and even causes the risk of the peripheral diffusion of the tumor cells.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the above-mentioned among the prior art not enough, provide one kind can solve among the prior art puncture biopsy needle and be difficult to effectively draw the puncture biopsy trocar of barb screw core orthopedics of the problem of pathological change tissue.

In order to solve the technical problem, the utility model discloses a following technical scheme:

the utility model provides a barbed thread core needle core bone puncture biopsy trocar, which comprises a sleeve, a positioning needle and a biopsy needle core, wherein the sleeve comprises a butt joint plate at the tail end, and the head end of the sleeve is in a sawtooth structure; the positioning needle comprises a positioning handle; the biopsy needle core comprises a holding handle at the upper part, a needle body matched with the sleeve is arranged at the lower part of the holding handle, a threaded needle head is arranged at the lower end of the needle body, and the thread tooth shape of the threaded needle head is a triangle with threads and the bottom surface of the adjacent upper side forming an acute angle.

In the above technical scheme, preferably, the maximum outer diameter of the threaded needle head is smaller than the diameter of the needle body.

Among the above-mentioned technical scheme, preferably, evenly be provided with the sawtooth on the upper flank of the screw thread of screw thread syringe needle.

In the above technical solution, preferably, the tooth profile of the serrations on the thread is an acute triangle.

In the above-described aspect, preferably, the end portion of the positioning pin has a triangular pyramid shape.

In the above technical solution, preferably, the length of the positioning needle is greater than the length of the sleeve.

In the above technical solution, preferably, the biopsy needle core has a length smaller than the sleeve.

In the above technical solution, preferably, the length of the sleeve is 17cm, the length of the positioning needle is 17.5cm, and the length of the biopsy needle core is 16.5 cm.

Among the above-mentioned technical scheme, preferred, the trocar still includes the poker, and the length of poker is the same with the pilot pin, and the poker tail end is equipped with holds the head.

In the above technical solution, preferably, the material of the poker is plastic.

The utility model provides an above-mentioned barb screw thread head nook closing member orthopedics puncture biopsy trocar's main beneficial effect lies in:

the utility model drives the sleeve to rotate by arranging the sleeve to be sleeved with the positioning needle, punctures cortical bone through skin soft tissue, rotates to the position of target focus tissue to be sampled so as to position the position to be sampled, and then takes out the positioning needle so as to insert the biopsy needle core for sampling; inserting the biopsy needle core into the sleeve, rotating the biopsy needle, and rotating and cutting part of pathological tissue and embedding the pathological tissue into the sleeve through the saw teeth of the head part while moving the biopsy needle and the sleeve downwards; when the depth of target focus tissue entering the sleeve reaches 5mm, the focus tissue can be locked by utilizing the barb-shaped thread teeth of the thread needle head together with the rotary biopsy needle core, and the needle is continuously inserted to the target depth according to the size of the focus and the puncture requirement. The needle core of the threaded needle head can assist in taking out the target lesion tissue and prevent the target lesion tissue from being separated from the sleeve when the sleeve is withdrawn, so that the efficiency of taking out the lesion tissue is greatly improved, and the clinical problem that the original hollow puncture needle is difficult to take out the lesion tissue is effectively solved.

By providing a stylet, the cannula is inserted into the sleeve after removal of the biopsy core, thereby gently pushing out target tissue from the sleeve that may still be within the sleeve.

Set up to the barb shape through the screw thread profile with the screw thread syringe needle, can increase the screw thread syringe needle and can imbed target tissue, set up jagged structure through the side on the screw thread, increase contact area and frictional force between screw thread syringe needle and pathological change tissue, improve and take out pathological change tissue's the volume of drawing and efficiency.

The device has simple structure and convenient operation, can avoid repeated operation in the operation of doctors, increase the operation time, cause larger wound, even cause the peripheral diffusion of tumor cells by repeated operation, relieves the pain of patients and has good social benefit.

Drawings

FIG. 1 is a schematic view of the engagement of the sleeve with the positioning pin.

FIG. 2 is a schematic view of the sleeve in mating relationship with a biopsy needle core.

Figure 3 is a schematic cross-sectional view of a threaded needle.

FIG. 4 is a schematic view of the configuration of the teeth on the thread of the threaded needle.

FIG. 5 is a schematic view of the sleeve and poker in mating relationship.

The biopsy needle comprises a sleeve 1, a sleeve 11, a butt plate 2, a positioning needle 21, a positioning handle 3, a biopsy needle core 31, a holding handle 32, a needle body 33, a threaded needle head 4, a poker bar 41 and a holding head.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in figure 1, the matching relation between the barbed threaded-head needle core orthopedic puncture biopsy trocar sleeve and the positioning needle is schematically shown.

The utility model discloses a puncture biopsy trocar with an agnail thread head for needle core department, which comprises a sleeve 1, a positioning needle 2 and a biopsy needle core 3, wherein the sleeve 1 comprises a butt plate 11 at the tail end, and the head end of the sleeve 1 is in a zigzag structure; the positioning needle 2 comprises a positioning handle 21, and the end part of the positioning needle 2 is in a triangular pyramid shape; as shown in fig. 2, the biopsy needle core 3 comprises a holding handle 31 at the upper part, a needle body 32 matched with the sleeve 1 is arranged at the lower part of the holding handle 31, and a threaded needle head 33 is arranged at the lower part of the needle body 32.

As shown in fig. 3, the thread profile of the threaded spike 33 is triangular with threads at acute angles to the adjacent upper base surface. The upper side surface of the thread of the threaded needle 33 is uniformly provided with sawteeth, and as shown in fig. 4, the tooth form of the sawteeth is an acute triangle.

The trocar also comprises a poker 4, as shown in figure 5, the length of the poker 4 is the same as that of the positioning needle 2, and the tail end of the poker 4 is provided with a holding head 41. The material of the poker 4 is plastics.

Preferably, the maximum outer diameter of the threaded needle 33 is smaller than the diameter of the needle body 32.

The length of the positioning needle 2 is greater than that of the sleeve 1. The biopsy core 3 has a length smaller than the length of the sleeve 1. Specifically, the length of the sleeve 1 is 17cm, the length of the positioning needle 2 is 17.5cm, and the length of the biopsy needle core 3 is 16.5 cm.

In the use of the actual bone aspiration biopsy operation, firstly, the locating needle 2 is inserted into the sleeve 1, the cortex lycii is punctured through the skin soft tissue, then the locating needle 2 is pulled out, then the biopsy needle core 3 is inserted and rotated to be pressed downwards, the lesion tissue is embedded and twisted into fragments by using the threaded needle head 33, and then the sleeve and the needle core are extracted together; taking out the biopsy needle core 3 to obtain a tissue block taken out from the needle head; the poker 4 is inserted to push out the lesion tissue and blood clot in the residual sleeve.

The foregoing description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and those skilled in the art will be able to understand the present invention as long as various changes are made within the spirit and scope of the present invention as defined and defined by the appended claims, and all such changes are obvious and contemplated by the present invention.

Claims

1. A puncture biopsy trocar with a barbed threaded head for department of orthopaedics is characterized by comprising a sleeve, a positioning needle and a biopsy needle core, wherein the sleeve comprises a butt joint plate at the tail end, and the head end of the sleeve is of a sawtooth structure; the positioning needle comprises a positioning handle; the biopsy needle core comprises a holding handle at the upper part, a needle body matched with the sleeve is arranged at the lower part of the holding handle, a threaded needle head is arranged at the lower end of the needle body, and the thread tooth shape of the threaded needle head is a triangle with threads and the bottom surface of the adjacent upper side forming an acute angle.

2. The barbed threaded trocar according to claim 1, wherein the threaded needle has a maximum outer diameter that is less than the diameter of the needle body.

3. The barbed, threaded-head corebone biopsy trocar according to claim 1, wherein the threads of the threaded needle are uniformly provided with serrations on an upper flank thereof.

4. The barbed threaded tip core orthopedic needle biopsy trocar according to claim 3, wherein the serrations on the threads are shaped as acute triangles.

5. The barbed, threaded trocar for core assisted surgical biopsy according to claim 1, wherein the end of the positioning needle is of triangular pyramid shape.

6. The barbed, threaded trocar for core assisted surgical biopsy according to claim 1, wherein the positioning needle has a length greater than a length of the sleeve.

7. The barbed threaded trocar according to claim 6, wherein the biopsy needle core has a length that is less than the length of the sleeve.

8. The barbed threaded trocar according to claim 7, wherein the sleeve has a length of 17cm, the positioning needle has a length of 17.5cm and the biopsy core has a length of 16.5 cm.

9. The barbed threaded trocar according to claim 1, wherein the trocar further comprises a stylet, the length of the stylet is the same as that of the positioning needle, and a holding head is provided at the trailing end of the stylet.

10. The orthopedic puncture biopsy trocar with the barbed threaded head and the stylet according to claim 9, wherein the material of the stylet is plastic.