CN214857569U

CN214857569U - Tissue marker conveying device with replaceable needle

Info

Publication number: CN214857569U
Application number: CN202022955206.3U
Authority: CN
Inventors: 益明星; 郭子学
Original assignee: Zhongzhi Medical Equipment Beijing Technology Consulting Co ltd
Current assignee: Guo Zixue; Yi Mingxing
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-11-26
Anticipated expiration: 2030-12-09

Abstract

The invention provides a tissue marker conveying device with a replaceable needle head, which comprises a handheld outer shell, a cap body connected to one end of the handheld outer shell and a needle head assembly connected to the handheld outer shell and far away from the end part of the cap body, wherein the needle head assembly comprises a needle head and a needle cap fixed to one end of the needle head, two sides of the needle cap are provided with buckles, one end, close to the needle head, of the handheld outer shell is provided with a clamping groove in matched clamping connection with the buckles, a first linkage rod and a second linkage rod are arranged inside the handheld outer shell, one end of the first linkage rod extends out of the cap body, two limiting blocks are oppositely arranged on the first linkage rod, two ends of the second linkage rod are respectively provided with a clamping ring and a connecting ring, the clamping ring is clamped between the two limiting blocks, a guide pipe is sleeved in the connecting ring, and the second linkage rod and the guide pipe are coaxially arranged. The tissue marker conveying device with the replaceable needle head provided by the invention can conveniently and quickly replace the needle head, the needle head does not rotate or slide at all, and stable and reliable butt joint is realized.

Description

Tissue marker conveying device with replaceable needle

Technical Field

The utility model relates to a medical appliance, in particular to a tissue marker conveying device with an interchangeable needle.

Background

The incidence of breast cancer is the second place of female malignancy, and breast cancer patients are rare. At present, the research on breast cancer in medical communities at home and abroad is extremely important. In the early diagnosis of breast cancer, pathological examination and accurate positioning of inaccessible lesions are the most effective and important links. Is the key to effective treatment of breast cancer patients at an early stage.

For women who are unfortunate with breast cancer and have to perform mastectomy, the breast conservation developed in recent years well solves the problems that some patients need to retain breasts with self-confidence symbols of the women and surely resect tumors to reduce metastasis and relapse. In the process of treating breast diseases by breast protection, the application of the breast tissue marking and positioning needle is more and more extensive.

A mammary tissue marking and positioning needle is a common instrument used for pathological examination and accurate positioning before a mammary disease operation at present. For example, breast lumps, a preoperative operation performed under mammography (X-ray or ultrasound), which locates a hidden breast lesion, so that breast conservation surgery is safer and faster, and incision wounds are small, and an imaging surgeon and an assistant thereof place a guide wire of the breast lesion with a breast locating needle before breast surgery, so as to locate the position and range of the breast lesion; then, a surgeon accurately finds the focus according to the guide of the guide wire, so that a small incision is achieved, and the resection amount of normal tissues is greatly reduced. In addition, after preoperative treatment such as drug treatment, the characteristics of some breast tumors can be obviously changed, in order to provide reliable basis for subsequent treatment schemes, doctors need to accurately control information such as the size and position of tumors before and after drug treatment, and the information needs to be realized through a breast tissue marking positioning needle.

There are very few breast tissue marker locator needle varieties that are currently on the market for clinical use, and this market segment is almost monopolized by products from bard corporation of america. The market lacks other similar products imported or made in China. The imported product is disposable because the imported product is provided with a marker by one needle. In clinical treatment such as lymph node cleaning, 2-4 markers are placed in one operation. Breast resection was used to mark the margins with about 5 markers per surgery. More than 4 markers are also placed in the preoperative neoadjuvant chemotherapy. Thus, when the breast protection treatment of breast diseases is completed, a plurality of breast tissue marker positioning needles (only one marker is filled in one needle) are used. A single imported product is expensive and multiple imported products can only function. The cost of the overall breast tissue marker locating needle is too high, and a great economic burden is imposed on the patient.

Thus, if a breast tissue marker locator needle could be used, the needle portion of the needle used to store the marker would be replaceable, while the handle portion would be reusable. A handle is adapted to engage a plurality of interchangeable needles and is packaged in sterile form. The mammary tissue marking positioning needle with the replaceable needle head can achieve the purpose of placing a plurality of markers by a method of replacing the needle head. Can meet the requirement of marking and positioning in one mammary gland disease treatment operation. A single product, if cost controlled, is functionally equivalent to multiple imported products. The cost of the breast tissue marking and positioning needle in the breast protection treatment is reduced to a fraction, even a tenth, of the original cost. The economic burden of the patient can be greatly reduced, and the method brings benefits to the majority of female breast disease patients.

Chinese patent publication No. CN 109009344 a discloses a puncture locator with replaceable needles, which is also a product designed by the present invention. Although the concept of needle replacement is similar, the technical solution is different. Specifically, this patent document discloses the use of two solutions for the connection between the needle and the handle, the first being a screw connection. That is, more than one thread is formed on the periphery of the plastic part of the needle head, the handle is provided with a mounting hole, and the mounting hole is internally provided with an internal thread corresponding to the external thread on the needle head to realize the screw connection. The defects of the design are two items, namely, a doctor wears rubber gloves in the operation, the gloves are full of blood and fat, and the operation of screwing fine threads is inconvenient. Therefore, the number of threads is not easy to be designed too much, otherwise, the doctor changes the needle once, and the thread is screwed in a smooth way, so that time and labor are wasted. Several needles are replaced in succession, which wastes valuable operation time and is inconvenient to operate. If the number of threads is too small, for example, 2 to 3 threads, the connection between the needle and the handle will be loose and not secure. For example, the connection between two steel pipes uses only 2 to 3 turns of threads, so that the centering property and the rigidity are poor and the connection is not firm. Secondly, the needle head is screwed on the handle by the screw thread, so that the direction of the needle point cannot be ensured to be always in a sight angle with the switch of the handle. This is very important in surgical procedures. When a doctor wants to release the mammary tissue marker under fluoroscopy, the doctor hopes to clearly observe that the marker is pushed out from the direction of the cutting surface of the needle point when the switch on the handle of the positioning needle is pushed, so that the marker is positioned at the accurate position. This requires that the orientation of the needle tip (cutting surface) be at a line of sight angle with the handle switch during design and manufacture of the positioning needle. This requirement is relatively easy to achieve on a disposable positioning needle without changing the needle. But is difficult to realize on the positioning needle with replaceable needle. The above-mentioned screw connections do not guarantee this requirement. The breast tissue marking and positioning needle has the defects that the threaded connection is very easy to cause blockage and dislocation when the central push rod pushes and places a marker due to poor centering performance of the needle head and the handle, so that operation failure is caused. And the needle head rotates along with the thread, so that the direction of the needle tip cannot be ensured to be always at a sight angle with the handle switch. The threaded connection has its inherent drawbacks.

The utility model discloses a second kind syringe needle is connected with the handle and has been designed a complicated block mechanism. An adapter is additionally arranged between the needle head and the handle, and a spring mechanism is arranged in the adapter. This further complicates the structural design of the product and greatly reduces reliability. As well as increasing manufacturing difficulty and cost. And makes the needle change operation inconvenient. The specific reason is analyzed according to the embodiment, in the structure of the embodiment 2, the periphery of the needle head connecting part 12A is a smooth conical surface, 22A is equivalent to a four-piece claw, when the spring is in a compressed state (22A is pushed backwards), the 22A claw is opened, the middle replaceable needle head can be taken down or put on, and the needle replacement is realized. When the spring is in the free state (22A is in the free state), the jaws of 22A will grip the exchangeable needle. The defects of the scheme of the embodiment are that the spring is small, the clamping force is insufficient, and the needle head is easy to pull out. The spring does not have an enlarged space due to the space limitation of the handle portion. In addition, the directionality of the needle is also not guaranteed. In the needle changing operation of clamping the needle head, the direction of the needle point rotates randomly in the 360-degree direction, and one direction cannot be fixed.

In the structure of embodiment 3, the spring assembly 29 is very short and the travel of the button 28 is very limited due to the space limitation of the handle connecting end, so that the elastic force exerted on the protrusion of the button mechanism 28 is very small. The connection of the needle to the handle is achieved by the projection on the button mechanism 28 engaging the recess on the needle 10B. The contact force-receiving area is too small and the elastic force exerted on the projection by the spring is too small. Resulting in a very uncluttered connection. After the needle head is connected, the needle head can be pulled out by slightly pulling out the needle head without pressing down a button through material object verification, and the locking of the handle to the needle head fails. And the spring cannot be enlarged any more due to space limitation. It can be said that this design is both complex and inefficient. The connection between the needle and the handle is not enough in contact force area only by the tabling between a small groove on the needle and a small bulge on the button. This engagement force is very weak. Once the needle is not connected to the handle, the needle may fall off during the operation or the doctor may leave the breast with the needle falling off when the doctor pulls out the positioning needle, which is not acceptable for both the doctor and the patient.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned not enough among the prior art, the utility model provides a tissue marker conveyor of interchangeable syringe needle, its compact structure, convenient operation can realize firm, reliable butt joint.

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

a tissue marker conveying device with a replaceable needle head comprises a handheld outer shell, a cap body connected to one end of the handheld outer shell and a needle head assembly connected to the handheld outer shell and far away from the end portion of the cap body, wherein a first linkage rod and a second linkage rod are arranged inside the handheld outer shell, one end of the first linkage rod extends out of the cap body, two limiting blocks which are oppositely arranged are arranged on the first linkage rod, two ends of the second linkage rod are respectively provided with a clamping ring and a connecting ring, the clamping ring is clamped between the two limiting blocks, a guide pipe is sleeved in the connecting ring, the second linkage rod and the guide pipe are coaxially arranged, one end, close to the guide pipe, of the second linkage rod is sleeved with a spring, the end, far away from the second linkage rod, of the spring is sleeved outside the guide pipe, the end, far away from the cap body, of the handheld outer shell is a stepped opening, the end, far away from the cap body, of the guide pipe is stepped and is clamped in the stepped opening, the utility model discloses a syringe needle subassembly, including the syringe needle and fix the needle cap in syringe needle one end, the both sides of needle cap are equipped with the buckle, handheld shell body is close to syringe needle one end and is equipped with draw-in groove and buckle cooperation joint, be equipped with primer push rod in the syringe needle, be equipped with catch bar and catch bar on the first linkage rod and pass the inside relative setting with primer push rod of guide tube, be equipped with push switch on the side of go-between, be equipped with the guide way and push switch on the handheld shell body and slide and set up in the guide way.

As an improvement, an L-shaped limiting guide groove is formed in the cap body, and a limiting column is arranged in the limiting guide groove on the first linkage rod.

As an improvement, the end part of the guide tube, which is far away from the cap body, is provided with a clamping hole, and the needle cap is clamped in the clamping hole.

As an improvement, a marker is arranged in one end of the needle head far away from the needle cap.

As a refinement, the marker is made of medical pure titanium or TC4 titanium alloy material.

As an improvement, the needle head, the push rod and the primer push rod are all made of 316L stainless steel materials.

The utility model has the advantages that:

the utility model discloses interchangeable syringe needle just can only insert into along a fixed direction and pass through draw-in groove and buckle cooperation joint. The advantage of doing so is that the needle point direction is unanimous with the push switch direction all the time, can guarantee that the doctor accurately releases the marker under the condition of intraoperative fluoroscopy. Only the needle head assembly is a disposable product, the rest can be reused, the groove is matched with the buckle, and the plugging and pulling are convenient and quick to replace. The structural design is simple and reliable. The processing and manufacturing are easy, the processing and manufacturing cost is reduced, and the connection is firm and reliable. The problems that when the medical gloves are used for threaded connection, a doctor wears the gloves during operation, blood and fat are stained on the gloves, the threads are very inconvenient to screw, and the operation time is consumed are solved. Because the syringe needle inserted bar is longer, the tip that the cap body was kept away from to the stand pipe is equipped with the joint hole and the needle cap joint is downthehole in the joint, and the connection centering nature of syringe needle is very good. This enables the pusher to push the primer pusher accurately each time without causing the failure or jamming of the primer pusher to release the labeled substance due to poor alignment. And when the needle is changed, the direction of the needle point is controllable and is always kept at a sight angle with the push switch. The corresponding number of the replaceable needle heads can be configured according to the dosage requirement of the marker in different operations, the whole mammary tissue marking and positioning needle does not need to be discarded after use, and compared with the traditional imported mammary tissue marking and positioning needle, the disposable mammary tissue marking and positioning needle has the advantage of price and can also reduce the economic burden of patients.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic plan view of the present invention;

fig. 3 is a schematic sectional structure of the present invention;

fig. 4 is a schematic view of the internal structure of the present invention;

fig. 5 is a schematic view of the structure of the guide tube and the needle assembly of the present invention.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

In order to make the content of the present invention more clearly understood, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the attached drawings in the embodiment of the present invention.

As shown in fig. 1-5, a tissue marker conveying device with a replaceable needle comprises a handheld outer shell 1, a cap body 2 connected to one end of the handheld outer shell 1, and a needle assembly 3 connected to the handheld outer shell 1 and far away from the end of the cap body 2, wherein a first linkage rod 4 and a second linkage rod 5 are arranged inside the handheld outer shell 1, one end of the first linkage rod 4 extends out of the cap body 2, two stoppers 6 arranged oppositely are arranged on the first linkage rod 4, two ends of the second linkage rod 5 are respectively provided with a snap ring 7 and a connecting ring 8, the snap ring 7 is connected between the two stoppers 6, a guide pipe 9 is sleeved in the connecting ring 8, the second linkage rod 5 and the guide pipe 9 are arranged coaxially, one end of the second linkage rod 5, which is close to the guide pipe 9, is sleeved with a spring 10, and the end of the spring 10, which is far away from the second linkage rod 5, is sleeved outside the guide pipe 9, the tip that the cap body 2 was kept away from to handheld shell body 1 is the ladder mouth, the tip that the cap body 2 was kept away from to the stand pipe 9 is established in the ladder mouth for echelonment and card, syringe needle subassembly 3 includes syringe needle 31 and fixes the needle cap 32 in syringe needle 31 one end, the both sides of needle cap 32 are equipped with buckle 11, handheld shell body 1 is close to syringe needle 31 one end and is equipped with draw-in groove 12 and 11 cooperation joints of buckle, be equipped with primer push rod 13 in the syringe needle 31, it passes inside and the relative setting of primer push rod 13 of stand pipe 9 to be equipped with catch bar 14 and catch bar 14 on the first linkage rod 4, be equipped with push switch 15 on the side of go-between 8, be equipped with guide way 16 and push switch 15 on handheld shell body 1 and slide and set up in guide way 16.

The cap body 2 is provided with an L-shaped limiting guide groove 18, and the first linkage rod 4 is provided with a limiting column 19 arranged in the limiting guide groove 18.

The end part of the guide tube 9 far away from the cap body 2 is provided with a clamping hole and the needle cap 32 is clamped in the clamping hole.

A marker 17 is provided in the end of the needle 31 remote from the cap 32.

The marker 17 is made of medical pure titanium or TC4 titanium alloy material.

The needle 31, the push rod 14 and the primer push rod 13 are all made of 316L stainless steel material.

In the using process of the device, the marker 17 is firstly placed into the needle head 31, the needle head 31 is pricked into the focus position of a patient, the switch 15 or the limiting column is pushed to push out the marker 17 in the needle head 31, and the focus is marked on the patient. When the physician needs to repeatedly puncture and place a plurality of markers 17, the snap 11 is squeezed to pull out the needle assembly 3 which has completed the release of the markers. The other needle assembly 3 with the marker 17 inside is replaced in the sterile package. Removing the needle assembly 3 is specifically performed by: the doctor presses the buckle 11 with the thumb and forefinger of the right hand, causing the buckle 11 to elastically deform so that the needle assembly 3 can be removed. At this time, the doctor holds the needle assembly 3 with the left hand and pulls out the needle assembly 3, so that the needle assembly 3 can be smoothly separated from the handheld outer shell 1. Repeating the steps, and finishing a plurality of operations of positioning and placing the breast disease marker 17.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and all modifications, equivalents, improvements and the like that are made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A tissue marker conveying device with a replaceable needle head comprises a handheld outer shell (1), a cap body (2) connected to one end of the handheld outer shell (1) and a needle head assembly (3) connected to the handheld outer shell (1) and far away from the end of the cap body (2), and is characterized in that a first linkage rod (4) and a second linkage rod (5) are arranged inside the handheld outer shell (1), one end of the first linkage rod (4) extends out of the cap body (2) to be arranged, two limiting blocks (6) which are oppositely arranged are arranged on the first linkage rod (4), two ends of the second linkage rod (5) are respectively provided with a clamping ring (7) and a connecting ring (8), the clamping ring (7) is clamped between the two limiting blocks (6), a guide pipe (9) is sleeved in the connecting ring (8), and the second linkage rod (5) and the guide pipe (9) are coaxially arranged, the utility model discloses a novel hand-held safety helmet, including the guide tube (9), the outside of guide tube (9) is established to one pot head that second trace (5) is close to guide tube (9) of second trace (5) and spring (10) are equipped with spring (10) and keep away from the tip cover of second trace (5), the tip that the cap body (2) were kept away from to handheld shell body (1) is the ladder mouth, the tip that the cap body (2) were kept away from to guide tube (9) is the ladder and the card is established in the ladder mouth, syringe needle subassembly (3) include syringe needle (31) and fix needle cap (32) in syringe needle (31) one end, the both sides of needle cap (32) are equipped with buckle (11), handheld shell body (1) is close to syringe needle (31) one end and is equipped with draw-in groove (12) and buckle (11) cooperation joint, be equipped with primer push rod (13) in syringe needle (31), be equipped with catch bar (14) and catch bar (14) on first trace (4) and pass inside and primer push rod (13) and set up with primer push rod (13) relatively, the portable handheld shell is characterized in that a push switch (15) is arranged on the side face of the connecting ring (8), a guide groove (16) is formed in the handheld shell (1), and the push switch (15) is arranged in the guide groove (16) in a sliding mode.

2. A needle changeable tissue marker delivery device according to claim 1, wherein: the cap body (2) is provided with an L-shaped limiting guide groove (18), and the first linkage rod (4) is provided with a limiting column (19) arranged in the limiting guide groove (18).

3. A needle changeable tissue marker delivery device according to claim 1, wherein: the end part of the guide tube (9) far away from the cap body (2) is provided with a clamping hole and the needle cap (32) is clamped in the clamping hole.

4. A needle changeable tissue marker delivery device according to claim 1, wherein: a marker (17) is arranged in one end of the needle head (31) far away from the needle cap (32).

5. A needle changeable tissue marker delivery device according to claim 4, wherein: the marker (17) is made of medical pure titanium or TC4 titanium alloy material.

6. A needle changeable tissue marker delivery device according to claim 4, wherein: the needle head (31), the push rod (14) and the primer push rod (13) are all made of 316L stainless steel materials.