CN216455233U - Ovum fetching needle - Google Patents

Abstract

The application relates to an ovum taking needle, which comprises a needle tube, a handle, a core needle and an elastic plug, wherein the needle tube is provided with a hollow tube cavity, and the head end of the needle tube is provided with a needle tube blade surface; the handle is provided with a first inner hole for installing a needle tube, a second inner hole communicated with the first inner hole in the same direction and penetrating to the tail end of the handle, and a third inner hole communicated with the first inner hole and extending to penetrate to the outer side of the handle along the direction forming an included angle with the extending direction of the first inner hole; the core needle comprises a core needle body and a handheld part, and the head end of the core needle body is provided with a needle body blade surface; the elastic plug is a solid elastic material body and is plugged in the second inner hole, the needle body of the core needle is inserted into the tube cavity of the needle tube from the elastic plug during puncture until the blade surface of the needle body is aligned with the blade surface of the needle tube, the tube cavity of the needle tube is blocked, and the elastic plug recovers the solid state to block the second inner hole after the core needle is taken out during egg taking. This get ovum needle can avoid normal tissue to get into the needle tubing when the puncture, takes out the core needle and can realize the ovum collection again, has promoted the probability of getting the ovum operation success in the time of convenient operation.

Description

Ovum fetching needle

Technical Field

The present application relates to medical aids, and more particularly, to an oocyte retrieval needle for collecting mature oocytes under ultrasound guidance.

Background

In recent years, the number of infertile patients is increasing due to the acceleration of work pace and the increasing of work competition pressure, and under the combined influence of other various factors and the reasons of the patients themselves. The artificial assisted conception in clinic has become an effective medical means. The method is simple, convenient, visual and safe, can accurately collect each follicle, and greatly improves the ovum collection efficiency. The design scheme and the processing technology of the ovum taking needle directly determine whether the follicle collection can be successful.

In the process of follicle collection, firstly, under the guidance of an ultrasonic intracavity probe, the pelvic cavity needs to be thoroughly scanned, and the position of the uterus, the shape of the endometrium, the position of the ovary and the number of follicles to be aspirated are known. And secondly, after the position of the punctured follicle is determined, the ovum taking needle respectively passes through a guide groove of the puncture stent, the vaginal wall, the peritoneum, the ovary and the follicle by the guide of the puncture stent in the ultrasonic probe cavity. In the process, most of the egg taking needles are of a hollow structure at present, and in the puncturing process, normal tissues of a human body can enter a hollow tube cavity of the egg taking needle, so that the separation of eggs and the normal tissues can be difficult due to the fact that the normal tissues are extracted into a test tube in the follow-up follicle aspiration process, and in a more serious case, the hollow tube cavity of the egg taking needle can be blocked, and finally, the egg taking failure can be caused.

SUMMERY OF THE UTILITY MODEL

The technical problem that this application will solve lies in, to prior art's above-mentioned defect, provides one kind and can avoid human normal tissue to get into the needle way and cause to get the ovum needle of getting unsmooth or failure getting the ovum in the ovum process.

The technical scheme adopted by the application for solving the technical problem is as follows: the utility model provides an ovum needle of getting, includes needle tubing, handle, core needle and elasticity stopper, wherein: the needle tube is provided with a hollow tube cavity which is communicated with the head and the tail, and the head end of the needle tube is provided with a needle tube blade surface; the handle is provided with a first inner hole, a second inner hole and a third inner hole, wherein the first inner hole extends from the head end of the handle to the tail end of the handle and is used for mounting a needle tube, the second inner hole is communicated with the first inner hole in the same direction and penetrates to the tail end of the handle, the third inner hole is communicated with the first inner hole and extends to penetrate to the outer side of the handle along the direction forming an included angle with the extending direction of the first inner hole, and the tail end of the needle tube is fixedly arranged in the first inner hole; the core needle comprises a core needle body and a handheld part connected to the tail end of the core needle body, and the head end of the core needle body is provided with a needle body blade surface in the same direction with the needle tube blade surface; the elastic plug is a solid elastic material body and is plugged in the second inner hole of the handle, during puncture, the core needle body of the core needle penetrates through the elastic plug in the second inner hole from the tail end of the handle and is inserted into the tube cavity of the needle tube until the needle body blade surface is aligned with the needle tube blade surface, the tube cavity of the needle tube is blocked, and after the core needle is taken out, the elastic plug returns to a solid state to block the second inner hole.

In one embodiment of the ovum retrieval needle, the core needle body is a solid needle body; or the core needle body is provided with a hollow small hole.

According to one embodiment of the ovum taking needle, the elastic plug is provided with a plug body which is consistent with the shape of the second inner hole and a guide section which is formed at the tail end of the plug body, and the tail end of the guide section is provided with a guide hole for the core needle body to penetrate into.

According to the application, in one embodiment of the ovum taking needle, a transition step is formed between the plug body and the guide section of the elastic plug, the tail end of the handle is further sleeved with a limiting ring, and a limiting step used for abutting against the transition step of the elastic plug is arranged in the limiting ring.

According to an embodiment of the ovum needle of getting described in this application, the spacing collar is connected with the tail end viscose of handle, threaded connection or buckle connection.

According to one embodiment of the ovum taking needle, the tail end of the needle tube is arranged at one side, close to the tail end of the handle, of the communication position of a first inner hole and a third inner hole in the first inner hole of the handle, and the needle tube is provided with a through hole for communicating the third inner hole with the lumen of the needle tube at the communication position of the first inner hole and the third inner hole; or the tail end of the needle tube is arranged on one side, away from the tail end of the handle, of the communication position of the first inner hole and the third inner hole in the first inner hole of the handle.

In one embodiment of the ovum pick-up needle according to the application, the handle is provided with a first mark for indicating the direction of the needle tube blade surface of the needle tube.

In one embodiment of the ovum taking needle, the handheld part of the core needle is provided with a second mark for indicating the direction of the needle body blade surface of the core needle body.

In one embodiment of the ovum taking needle, the first mark is a convex strip which is convexly arranged on the outer side of the handle and is aligned with the needle tube blade surface, and the second mark is a convex block which is arranged on the handheld part and is aligned with the needle body blade surface.

In one embodiment of the ovum taking needle, the handle is provided with a connecting pipe which obliquely extends from the outer side of the handle, and the third inner hole is formed in the connecting pipe.

The implementation of the ovum taking needle has the following beneficial effects: according to this application embodiment get ovum needle and fill in a solid elastic plug with the second hole of needle tubing intercommunication in the handle, it blocks up the lumen of needle tubing to pass the elastic plug with the core needle, get the ovum needle puncture in-process, human tissue can not enter into the needle tubing, get the ovum needle and reach the operation target position after, take the core needle away from getting the ovum needle in, the elastic plug restores solid state through self resilience force and blocks up the second hole, the ovum gets the ovum during operation gets the ovum and gets into the suction catheter and then get into the ovum cell and gather the test tube from the passageway that needle tubing and third hole formed, ensure that the operation of getting the ovum by puncture goes on smoothly. Thereby get the ovum needle and avoided normal tissue to get into the needle tubing and lead to getting the ovum smooth or the problem of failure according to this application embodiment, both guaranteed medical personnel convenient operation, promoted the successful probability of ovum operation simultaneously again.

Drawings

The present application will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic structural view of an egg taking needle according to an embodiment of the present application in a use state;

FIG. 2 is a schematic exploded view of an ovum pick-up needle according to an embodiment of the present application;

FIG. 3 is a sectional view of the ovum-taking needle shown in FIG. 2 in a state where it is inserted into the core needle;

FIG. 4 is a sectional view of the ovum pick-up needle shown in FIG. 2 in a state where the core needle is removed;

fig. 5 is a schematic perspective view of the handle and the elastic plug of the ovum-taking needle shown in fig. 2.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. Also, the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Referring first to fig. 1 and 2, an ovum-taking needle 10 according to an embodiment of the present application is mainly composed of a needle tube 11, a handle 12, a core needle 13 and an elastic plug 14. The needle tube 11 has a hollow lumen 111 running through from head to tail, the head end of the needle tube 11 forms a needle blade surface 112, and the needle tube 11 is provided with a through hole 113 running through the lumen 111 at a position near the tail end. The core needle 13 comprises a solid core needle body 131 and a hand-held part 132 connected to the tail end of the core needle body 131 for convenient holding, the core needle body 131 has a shape matched with the lumen 111 of the needle tube 11, and the head end of the core needle body 131 has a needle body blade surface 1311 in the same direction as the needle tube blade surface 112. The elastic plug 14 is a solid elastic material body, and can be made of Rubber, silica gel, TPE (thermoplastic Elastomer)/TPR (thermoplastic Rubber), and other materials, such as a medical butyl Rubber plug commonly used for blood collection tubes, which is non-toxic and odorless, has good toughness, so that the channel is not damaged and extends to the periphery after puncture, and has good resilience, so that the channel is automatically closed to form good sealing performance after the core needle is pulled away.

As shown in fig. 2 and 3, the handle 12 has a first bore 121, a second bore 126, and a third bore 125. A first bore 121 extends from the head end of the handle to the tail end of the handle for fixedly mounting the needle cannula 11. The second bore 126 is connected to the end of the first bore 121, and is communicated with the first bore 121 in the same direction and extends to the end of the handle 12 for plugging the elastic plug 14 for inserting the needle body 131 of the needle 13. The third bore 125 is formed in the connection tube 122 extending obliquely from the outside of the handle 12, forms an angle with the extending direction of the first bore 121, and communicates with the first bore 121 at the intersection. Referring to fig. 3, when the core needle body 131 of the core needle 13 is inserted into the lumen 111 of the needle tube 11 from the tail end of the handle 12 through the elastic plug 14 in the second inner hole 126 until the needle body blade surface 1311 is aligned with the needle tube blade surface 112, the solid core needle body 131 blocks the needle tube 11 to prevent human tissue from entering the needle tube 11 during puncturing. Meanwhile, the insertion degree of the core needle 13 can be limited by the abutting of the handheld part 132 of the core needle 13 against the tail end of the elastic plug 14 and/or against the tail end of the handle 12, so that the needle body blade surface 1311 of the core needle body 131 is ensured to be exactly aligned with the needle tube blade surface 112.

In the puncture process of the ovum retrieval needle 10, the core needle body 131 of the core needle 13 blocks the lumen 111 of the needle tube 11, and human tissues cannot enter the needle tube 11. After the ovum-taking needle 10 reaches the position of the operation target, the holding part 132 of the core needle 13 is held and held to directly draw the core needle 13 back, the lumen 111 of the needle tube 11 is in a hollow state, and the elastic plug 14 restores to a solid state through the self resilience performance to block the second inner hole 126. Referring to fig. 4, since the tail end of the needle tube 11 extends to the connection between the first bore 121 and the second bore 126, i.e. the side of the connection between the first bore 121 and the third bore 125 near the tail end of the handle, the through hole 113 of the needle tube 11 is opened opposite to the connection between the first bore 121 and the third bore 125, so as to connect the third bore 125 with the lumen 111 of the needle tube 11, thereby forming an ovum-taking channel. According to various embodiments of the present application, the rear end of the needle tube 11 may be disposed at a side of the first bore 121, which is far from the rear end of the handle, where the first bore 121 communicates with the third bore 125, and the lumen 111 of the needle tube 11 is communicated with the third bore 125 of the handle 12 after the core needle 13 is drawn out, so that a through hole does not need to be formed in the needle tube 11.

When taking out eggs, as shown in fig. 1, the connecting tube 122 of the handle 12 is connected to the suction catheter 2, the suction catheter 2 passes through the silica gel plug 3 and is connected to the egg cell collection tube 7, and simultaneously, the vacuum catheter 5 with the conical joint 6 also passes through the silica gel plug 3 and is connected to the egg cell collection tube 7. When the conical joint 6 is connected with a negative pressure device for work, the egg cells enter the suction catheter 2 from an egg taking channel formed by the needle tube 11 and the connecting tube 122 and then enter the egg cell collecting test tube 4, and smooth collection is realized.

As further shown in fig. 4 and 5, the rear end of the handle 12 is provided with a joint portion 127, the second inner hole 126 penetrates the rear end of the joint portion 127, and the handle 12 is further provided with a stop collar 124 sleeved with the joint portion 127. In particular, the stop collar 124 may be fixedly connected to the engaging portion 127 by various suitable connecting means, such as an adhesive connection, a threaded connection, or a snap connection. The elastic plug 14 has a plug body 141 with a shape consistent with the shape of the second inner hole 126 and a guide section 142 formed at the tail end of the plug body 141, a guide hole 144 for the core needle body 131 to penetrate is opened at the tail end of the guide section 142, and a transition step 143 is formed between the plug body 141 and the guide section 142 of the elastic plug 14. After the plug body 141 of the elastic plug 14 is installed in the second inner hole 126 of the handle 12, the limiting ring 124 is sleeved on the joint part 127, so that the head end face 1241 of the limiting ring 124 abuts against the step face 128 on the handle 12, and the limiting step 1242 arranged in the limiting ring 124 just abuts against the transition step 143 of the elastic plug 14, thereby preventing the elastic plug 14 from being pulled out of the second inner hole 126. Furthermore, the stop collar 124 may also compress the elastomeric plug 14 such that the elastomeric plug 14 has an inward compression tendency, thereby providing a more pronounced spring back toward the center after withdrawal of the core pin 13.

The ovum retrieval needle 10 according to the above embodiment of the present application is provided with a solid elastic plug 14 in the second inner hole 126 of the handle 12 communicating with the needle tube 11, the lumen 111 of the needle tube 11 is blocked by the core needle body 131 of the core needle 13 penetrating the elastic plug 14, and human tissue can not enter the needle tube 11 during the puncturing process of the ovum retrieval needle 10. Generally, the specification of the ovum taking needle is 14G-21G, such as a common needle type 16G, the outer diameter of the needle tube 11 of the specification is about 1.69mm, the corresponding inner diameter is 1.1mm, and the diameter of the needle body 131 of the core needle 13 can be designed to be 1.0mm to match the inner diameter of the needle tube. The core needle body 131 with such a size can easily pierce the elastic plug 14, and the elastic plug 14 can be restored to a solid state by its own resilient force to block the second inner hole 126 after the core needle body 131 is withdrawn. When taking out the ovum, the ovum cell enters the suction catheter 2 from the channel formed by the needle tube 11 and the third inner hole 125 and then enters the ovum cell collection test tube 4, thus realizing the collection of the ovum cell.

As further shown in fig. 2, a convex strip 123 aligned with the needle cannula blade surface 112 of the needle cannula 11 is protruded from the outer side of the handle 12, and is used as a first mark for indicating the direction of the needle cannula blade surface 112, which is convenient for operation and use. The hand-held portion 132 of the core pin 13 is also provided with a projection 1321 aligned with the pin body blade surface 1311 as a second mark indicating the direction of the pin body blade surface 131. The user may insert the core pin 13 by aligning the protrusions 1321 on the core pin 13 with the ribs 123 on the handle 12 to ensure that the body blade surface 1311 of the core pin 13 and the barrel blade surface 112 of the barrel 11 are aligned. Because elastic friction force exists between the core needle 13 and the elastic plug 14, between the elastic plug 14 and the second inner hole 126 of the handle 12, the needle body blade surface 1311 of the core needle 13 and the needle tube blade surface 112 of the needle tube 11 can be directly aligned and then pressed tightly by the limiting ring 124, and the rotation is limited by the friction force respectively without arranging other limiting structures. Of course, according to various embodiments of the present application, a further stop structure (e.g., a bump-and-groove fit) may be provided between the handle portion 132 of the core pin 13 and the handle 12 to quickly meet the mounting alignment requirements of the needle body blade surface 1311 and the needle cannula blade surface 112.

In addition, according to different embodiments of the present application, a certain gap between the core needle body and the lumen of the needle tube may be designed to communicate with the atmosphere, or the core needle body of the core needle may not be designed to be solid, for example, the core needle body may have a hollow small hole for communicating with the atmosphere, as long as the cut tissue is not easy to enter the small hole or the gap between the core needle and the needle tube during the needle tube puncture process, such a design may further prevent the negative pressure formed when the core needle is withdrawn from causing unpredictable internal blood drawing or early follicle drawing into the needle tube.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. The utility model provides an ovum needle of getting, its characterized in that includes needle tubing, handle, core needle and elasticity stopper, wherein:

the needle tube is provided with a hollow tube cavity which is communicated with the head and the tail, and the head end of the needle tube is provided with a needle tube blade surface;

the handle is provided with a first inner hole, a second inner hole and a third inner hole, wherein the first inner hole extends from the head end of the handle to the tail end of the handle and is used for mounting a needle tube, the second inner hole is communicated with the first inner hole in the same direction and penetrates to the tail end of the handle, the third inner hole is communicated with the first inner hole and extends to penetrate to the outer side of the handle along the direction forming an included angle with the extending direction of the first inner hole, and the tail end of the needle tube is fixedly arranged in the first inner hole;

the core needle comprises a core needle body and a handheld part connected to the tail end of the core needle body, and the head end of the core needle body is provided with a needle body blade surface in the same direction with the needle tube blade surface;

the elastic plug is a solid elastic material body and is plugged in the second inner hole of the handle, during puncture, the core needle body of the core needle penetrates through the elastic plug in the second inner hole from the tail end of the handle and is inserted into the tube cavity of the needle tube until the needle body blade surface is aligned with the needle tube blade surface, the tube cavity of the needle tube is blocked, and after the core needle is taken out, the elastic plug returns to a solid state to block the second inner hole.

2. The ovum retrieval needle as recited in claim 1, wherein the core needle body is a solid needle body; or the core needle body is provided with a hollow small hole.

3. The ovum pick-up needle according to claim 1, wherein the elastic plug is provided with a plug body which is in accordance with the shape of the second inner hole and a guide section which is formed at the tail end of the plug body, and the tail end of the guide section is provided with a guide hole for the core needle body to penetrate into.

4. The ovum pick-up needle as claimed in claim 3, wherein a transition step is formed between the plug body and the guide section of the elastic plug, a limit ring is sleeved on the tail end of the handle, and a limit step for abutting against the transition step of the elastic plug is arranged in the limit ring.

5. The ovum pick-up needle as claimed in claim 4, wherein the spacing ring is connected with the tail end of the handle by glue, screw thread or buckle.

6. The ovum taking needle as claimed in claim 1, wherein the tail end of the needle tube is arranged at one side of the communication part of the first inner hole and the third inner hole of the first inner hole of the handle, which is close to the tail end of the handle, and the needle tube is provided with a through hole at the communication part of the first inner hole and the third inner hole, which is used for communicating the third inner hole with the lumen of the needle tube; or the tail end of the needle tube is arranged on one side, away from the tail end of the handle, of the communication position of the first inner hole and the third inner hole in the first inner hole of the handle.

7. The aspiration needle of claim 1, wherein the handle is provided with a first mark for indicating the direction of the needle blade of the needle cannula.

8. The ovum pick-up needle as claimed in claim 7, wherein the holding part of the core needle is provided with a second mark for indicating the direction of the needle body blade surface of the core needle body.

9. The ovum pick-up needle of claim 8, wherein the first mark is a convex strip protruding from the outer side of the handle and aligned with the needle body blade surface, and the second mark is a convex block aligned with the needle body blade surface and arranged on the hand-held part.

10. The ovum pick-up needle as claimed in claim 1, wherein the handle is provided with a connection tube extending obliquely from an outer side of the handle, and the third inner hole is formed in the connection tube.

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