CN213821512U

CN213821512U - Skin biopsy needle

Info

Publication number: CN213821512U
Application number: CN202020996640.3U
Authority: CN
Inventors: 杨慧; 何瑾; 赖璐璐
Original assignee: Second People's Hospital Of Fujian University Of Traditional Chinese Medicine; First Affiliated Hospital of Fujian Medical University
Current assignee: Second People's Hospital Of Fujian University Of Traditional Chinese Medicine; First Affiliated Hospital of Fujian Medical University
Priority date: 2020-06-03
Filing date: 2020-06-03
Publication date: 2021-07-30
Anticipated expiration: 2030-06-03

Abstract

The utility model discloses a skin biopsy needle, which comprises a housin, syringe needle and drive arrangement, drive arrangement has actuating mechanism, compression spring and push rod, the syringe needle is installed on the lower extreme tip of push rod, syringe needle, push rod and compression spring all are in well plenum chamber, last through-hole and lower through-hole have been seted up on the casing, actuating mechanism is in well plenum chamber and partly through the upper through-hole stretch out the casing outside, the inner wall epirelief of casing is equipped with the location step, the location step separates well plenum chamber into two regions that communicate and accurately restrict actuating mechanism and compression spring motion range, integrated into one piece has the lug on the push rod, compression spring cover is located on the lower extreme of push rod, upper end and lower tip push up tightly respectively on lug and the inner wall of casing lower extreme; the lower end of the shell is connected with a metal ring. Compared with the prior art, the utility model discloses a skin biopsy needle, it is convenient operation not only, sample position is accurate, with low costs, is convenient for moreover treat to extract tissue position local fixation, and convenient quick tissue is got and is examined.

Description

Skin biopsy needle

Technical Field

The utility model relates to a medical apparatus field, concretely relates to skin biopsy needle.

Background

A biopsy needle is a medical instrument used for sampling living tissues of pyramidal tumors, unknown tumors, and the like of various organs such as kidney, liver, lung, breast, thyroid, prostate, pancreas, testis, uterus, ovary, body surface, and the like, and sucking cells, and the like. Typical biopsy needles include inverted cone needles, Fowler needles, single bevel cone needles, hypodermic needles and Turkey needles.

The existing biopsy needle is generally used for sampling the forearm part of the arm. When in use, local anesthesia is carried out on the forearm part to be sampled, and after the anesthesia takes effect, the lower end metal ring part of the biopsy needle is directly inserted into the forearm skin to reach the dermis layer for sampling. However, in the conventional biopsy needle, since a tissue block is not fixed inside the dermis layer of the forearm, the removed tissue block is easily adhered to the tissue in the forearm, and is not easy to be removed, and the tissue after being removed is not easy to be removed from the metal ring for experimental analysis. Meanwhile, when the existing biopsy needle is used for sampling, the forearm skin is connected layer by layer, so the forearm skin cannot be quickly positioned to the skin layer to be corium. Therefore, it is inconvenient and troublesome for the medical staff to work normally.

For this reason, there is an existing 3D printing technology (i.e., the engineers team New Brunswick at the University of rages (Rutgers University) is developing 3D printing microneedles that can alleviate pain associated with drug injections, vaccination, and blood sampling. the 3D printing microneedles with barbs can better reside in the subcutaneous tissue for the benefit of the parasite-inspired microneedles, in fear of far exceeding the discomfort associated with the reference to the eyes), but is too costly and impractical.

Accordingly, the present inventors have made extensive studies to solve the above problems and have made the present invention.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a skin biopsy needle, convenient operation not only, the sample position is accurate and with low costs, is convenient for moreover treat to extract tissue position local fixation, and convenient quick tissue is got and is examined.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a skin biopsy needle comprises a shell with a hollow cavity, a needle head in the hollow cavity and a driving device for installing the needle head and enabling the needle head to vertically move and sample tissues through manual pressing, wherein the driving device is provided with a driving mechanism, a compression spring and a push rod, the upper end of the driving device is detachably connected with the driving mechanism, the lower end of the driving device is used for sleeving the compression spring into a limiting push rod, the needle head is installed on the lower end part of the push rod, the needle head, the push rod and the compression spring are all arranged in the hollow cavity, the upper end of the shell is provided with an upper through hole, the lower end of the shell is provided with a lower through hole for extending the needle head, the driving mechanism is arranged in the hollow cavity and partially extends out of the shell through the upper through hole, the inner wall of the shell is convexly provided with an annular positioning step, and the positioning step divides the hollow cavity into two areas which are communicated and accurately limit the movement ranges of the driving mechanism and the compression spring, the upper end surface of the compression spring is pressed against the lower step surface of the positioning step, the compression spring is sleeved on the lower end of the push rod, and the upper end part and the lower end part of the compression spring are respectively pressed against the lug and the inner wall of the lower end of the shell; the lower end part of the shell is detachably connected or fixedly connected with a metal ring communicated with the lower through hole.

Further, actuating mechanism includes the cap body and drive block, the cap body has through last through-hole stretch out outside the casing top and supply the pressing portion that the hand thumb pressed and be in all the time annular dogtooth portion in the casing, have on the drive block with the similar dogtooth that matches of annular dogtooth portion on the cap body, the bottom surface of drive block is equipped with the cavity to the top surface, the cavity is located the bottom surface center department of drive block, the snubber block has set firmly in the cavity, the upper end embedding of push rod in the cavity, and the top leans on the snubber block.

Furthermore, the cap body, the transmission block, the compression spring and the push rod jointly form a one-way ratchet structure which drives the push rod to move up and down in a reciprocating limiting manner.

Further, the needle head is a Foxin needle or a 3D printing micro needle head with barbs.

Further, the length of the metal ring is 4.5-5.5mm, and the inner diameter of the metal ring is 2-4 mm.

Further, the metal ring is a medical 304 stainless steel ring.

Further, the shock absorption block is an elastic silica gel block.

The utility model has the advantages that: by arranging the metal ring on the lower end of the shell, when the sampling device is used, the edge of the metal ring can be pressed against the tissue block at the dermis of the arm to be sampled, and meanwhile, the edges of the metal ring are separated. The needle is then caused to reciprocate out of the lower end of the housing by manual depression of the drive means, the needle being inserted into a tissue block at the dermis of the arm bounded by the rim of the ferrule. When the pressing is removed, under the action of the compression spring, the needle head is matched with the metal ring, the tissue block at the position of the dermis of the arm fixed by the metal ring is sampled into the metal ring, and the problem that the existing biopsy is not good in sampling due to the fact that the tissue block at the position of the dermis of the arm is bonded when the existing biopsy is used for sampling is solved. After the tissue is taken away, the tissue is conveniently taken out from the metal ring at the front end of the shell. In addition, the annular positioning step is convexly arranged on the inner wall of the shell, the hollow cavity is divided into two areas which are communicated with each other and accurately limit the movement range of the driving mechanism and the compression spring by the positioning step, the depth of the needle head which is accurately limited and placed into the tissue block at the corium layer of the arm to be sampled is realized, unnecessary trauma to the sampled part due to too deep sampling is avoided, meanwhile, the uncomfortable feeling to the sampled part is relieved, and the time required for recovering the sampled part is favorably shortened. Therefore, the utility model relates to a skin biopsy needle, it is convenient operation not only, sample position is accurate and with low costs, is convenient for moreover treat to extract tissue position local fixation, and convenient quick tissue is got and is examined.

Drawings

For ease of illustration, the present invention is described in detail by the following detailed description and accompanying drawings.

Fig. 1 is a schematic structural diagram (shown in a sectional view of the housing in the figure) of the present invention.

Fig. 2 is a schematic view of a view from another angle in fig. 1 (i.e., an enlarged view of the view from another angle in fig. 1).

In the figure:

a shell-1; a needle head-2; the hollow cavity chamber is-01; positioning a step-02; a compression spring-4; a push rod-5; a bump-51; a metal ring-6; a cap body-7; a transmission block-8; a damper block-9.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following embodiments.

As shown in fig. 1-2, the utility model discloses a skin biopsy needle, including casing 1 that has well cavity 01, be in the syringe needle 2 of well cavity 01 and supply syringe needle 2 to install and press the drive arrangement who makes 2 vertical motion sample organizations of syringe needle through the manual work, casing 1 is bullet shape, drive arrangement has actuating mechanism, compression spring 4 and upper end and actuating mechanism and dismantles and be connected, and the lower extreme supplies compression spring 4 to embolia in spacing push rod 5, syringe needle 2 is installed on the lower extreme tip of push rod 5, syringe needle 2 push rod 5 with compression spring 4 all is in well cavity 01. The upper end of casing 1 has been seted up the through-hole, the confession has been seted up to the lower extreme of casing 1 the lower through-hole that syringe needle 2 stretches out, actuating mechanism is in 01 and part pass through in the cavity chamber go up the through-hole and stretch out outside casing 1, integrated into one piece has and is annular location step 02 on the inner wall of casing 1, location step 02 will two regions that communicate with each other and accurate restriction actuating mechanism and compression spring 4 range of motion are separated into in the cavity chamber, integrated into one piece has the up end on push rod 5 with the lug 51 that the lower step face of location step 02 offseted, here lug 51 can also with push rod 5 on integrated into one piece flange ring, not only restrict the shape, satisfy the surface with the lower step face of location step 02 offsets and can. The compression spring 4 is sleeved on the lower end of the push rod 5, and the upper end part and the lower end part of the compression spring 4 are respectively tightly propped against the lug 51 and the inner wall of the lower end of the shell 1; the lower end part of the shell 1 is detachably connected or fixedly connected with a metal ring 6 communicated with the lower through hole. By adopting the structure, when in use, the edge of the metal ring 6 can be pressed against the tissue block at the dermis of the arm to be sampled, and meanwhile, the edges of the metal ring 6 are separated. Needle 2 is then caused to reciprocate out of the lower end of housing 1 by manual depression of the drive means, and needle 2 is inserted into the tissue mass at the dermis of the arm bounded by the rim of metal ring 6. When removing to press, at compression spring 4 effects, syringe needle 2 and becket 6 cooperation, in the becket 6 is sampled to the becket 6 with the fixed arm corium department tissue piece of becket 6, solve and adopt current biopsy to cohere the problem that influences and lead to not good sample to arm corium department tissue piece when taking a sample. After the tissue is taken away, the tissue is conveniently taken out from the metal ring 6 at the front end of the shell 1. Meanwhile, the annular positioning step 02 is convexly arranged on the inner wall of the shell 1, the hollow cavity is divided into two areas which are communicated with each other and accurately limit the movement range of the driving mechanism and the compression spring 4 by the positioning step 02, the depth of the needle head 2 which is accurately limited and placed into the tissue block at the corium layer of the arm to be sampled is achieved, unnecessary trauma to the sampled part due to too-deep sampling is avoided, discomfort generated to the sampled part is relieved, and the time required for recovering the sampled part is shortened.

In this embodiment, actuating mechanism includes cap body 7 and driving block 8, cap body 7 has and stretches out through last through-hole outside the casing 1 top and supply the annular dogtooth portion in the casing 1 is pressed to the splenium and be in all the time, have on the driving block 8 with the similar dogtooth that matches of annular dogtooth portion on the cap body 7, the bottom surface of driving block 8 is equipped with the cavity to the top surface, the cavity is located the bottom surface center department of driving block 8, the cavity intracavity sets firmly has snubber block 9, the upper end embedding of push rod 5 in the cavity, and the top leans on snubber block 9. Specifically, the damping block 9 is an elastic silica gel block, so that the damping block is safe, non-toxic and environment-friendly. By adopting the structure, the syringe needle 2 can extend out of the shell 1 and is not fixed to the longest length, and can directly return into the shell 1 and automatically limit the position. The damping block 9 is arranged, so that when the needle 2 returns to the shell 1, the upper end of the push rod 5 (namely, the push rod 5 is under the action of the elastic force of the compression spring 4) vibrates to transmit to the shell 1, and recoil is generated on the hand, so that the hand of a human body cannot be held tightly.

In this embodiment, the cap body 7, the transmission block 8, the compression spring 4 and the push rod 5 together form a one-way ratchet structure for driving the push rod 5 to perform up-and-down reciprocating limiting motion. The one-way ratchet structure is similar to the structure for controlling the extension of the refill in the existing cylindrical pen, and the difference is that: the internal control refill of the existing cylindrical pen is limited and fixed after extending out of the shell 1 and then automatically limited after returning into the shell 1. The one-way ratchet structure only ensures that the needle 2 is not fixed when extending out of the shell 1 to the longest length, and can directly return into the shell 1 for automatic limit. In other words: the tooth part of the cap body 7 and the transmission block 8 is only different from the tooth part of the part inside the existing cylindrical pen for controlling the extension and contraction of the pen core.

In this embodiment, the needle head 2 is a furin needle or a 3D printing micro needle head 2 with a barb. The sampling is mainly facilitated, and meanwhile, the damage to the sampled part is reduced.

In this embodiment, the length of the metal ring 6 is 4.5 to 5.5mm, the inner diameter of the metal ring 6 is 2 to 4mm, preferably, the length of the metal ring 6 is 5mm, and the inner diameter of the metal ring 6 is 3 mm. The metal ring 6 is limited to control the area and sampling amount of single sampling, and reduce the damage to the sampled part.

In this embodiment, the metal ring 6 is a 304 stainless steel medical ring. Thus, the sterilization is convenient and the infection is avoided.

As a further preferred feature of this embodiment, the housing 1, the cap 7, the push rod 5, the transmission block 8 and the compression spring 4 are made of a stainless steel housing 1, a stainless steel cap 7, a stainless steel push rod 5, a stainless steel transmission block 8 and a stainless steel compression spring 4 made of 304 stainless steel. Here, adopt such structure setting, be convenient for the utility model discloses a skin biopsy needle wholly can place in the antiseptic solution and disinfect, avoids the tradition to hand the not thorough of becket 6 and the sterile of syringe needle 2, or through the supplementary not thorough problem of becket 6 and the sterile of syringe needle 2 of conventional. The effects of more thorough disinfection and safety are achieved.

The utility model relates to a skin biopsy needle, it is convenient operation not only, sample position is accurate and with low costs, is convenient for moreover treat to extract tissue position local fixed, and convenient quick tissue is got and is examined.

The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications made by those skilled in the art should not be construed as departing from the scope of the present invention.

Claims

1. A skin biopsy needle, characterized in that: the needle sampling device comprises a shell with a hollow cavity, a needle head and a driving device, wherein the needle head is positioned in the hollow cavity, the driving device is used for installing the needle head and is used for manually pressing to enable the needle head to vertically move and sample tissues, the driving device is provided with a driving mechanism, a compression spring and a push rod, the upper end of the push rod is detachably connected with the driving mechanism, the lower end of the push rod is used for sleeving the compression spring into a limiting position, the needle head is arranged on the end part of the lower end of the push rod, the needle head, the push rod and the compression spring are all positioned in the hollow cavity, the upper end of the shell is provided with an upper through hole, the lower end of the shell is provided with a lower through hole for extending out the needle head, the driving mechanism is positioned in the hollow cavity and partially extends out of the shell through the upper through hole, an annular positioning step is arranged on the inner wall of the shell in a protruding manner, and divides the hollow cavity into two areas which are communicated and accurately limit the movement ranges of the driving mechanism and the compression spring, the upper end surface of the compression spring is pressed against the lower step surface of the positioning step, the compression spring is sleeved on the lower end of the push rod, and the upper end part and the lower end part of the compression spring are respectively pressed against the lug and the inner wall of the lower end of the shell; the lower end part of the shell is detachably connected or fixedly connected with a metal ring communicated with the lower through hole.

2. A skin biopsy needle according to claim 1, wherein: the driving mechanism comprises a cap body and a transmission block, the cap body is provided with a pressing portion extending out of the top of the shell through an upper through hole and used for being pressed by a hand thumb and an annular convex tooth portion which is located in the shell all the time, the transmission block is provided with convex teeth which are matched with the annular convex tooth portion on the cap body in a similar mode, the bottom surface of the transmission block is provided with a cavity towards the top surface, the cavity is located at the center of the bottom surface of the transmission block, a damping block is fixedly arranged in the cavity, and the upper end of the push rod is embedded into the cavity and abuts against the damping block.

3. A skin biopsy needle according to claim 2, wherein: the cap body, the transmission block, the compression spring and the push rod jointly form a one-way ratchet structure for driving the push rod to do up-and-down reciprocating limiting motion.

4. A skin biopsy needle according to claim 1, wherein: the pinhead is a Foxin needle or a 3D printing micro pinhead with barbs.

5. A skin biopsy needle according to claim 1, wherein: the length of the metal ring is 4.5-5.5mm, and the inner diameter of the metal ring is 2-4 mm.

6. A skin biopsy needle according to claim 1, wherein: the metal ring is a medical 304 stainless steel ring.

7. A skin biopsy needle according to claim 2, wherein: the shock absorption block is an elastic silica gel block.