Microinjection embryo transfer catheter

Abstract

A kind of embryo transfer catheter of microinjection, it is related to medical instrument technical field, solve the problem that embryo loading process is easy to have bubble with embryo into inner tube in prior art, damage embryo implantation environment and affect its development.Processing includes inner tube, needle tube joint, sheath and injection device, the inner tube is connected in the end of needle tube joint, the sheath is connected in the outer circumferential side of inner tube, the sheath is opened with sliding pipe in the inner tube, the end of sliding pipe is connected with positioning ring, the end of sheath is opened with clamping groove in the needle tube joint;The injection device includes needle cylinder, piston and push rod, the piston is sealed with the end of push rod Connection, the push rod is slidingly connected in the needle cylinder, the end of piston is opened with air buffer cavity.Processing has the beneficial effect that air buffer cavity can avoid the generation of bubble, reduce the possibility that bubble enters inner tube with embryo.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a micro-injection embryo transfer catheter. Background Technology

[0002] In the field of assisted reproductive technology, embryo transfer is a key step in achieving pregnancy, and the embryo transfer catheter, as the core device in this step, directly affects the embryo implantation rate and development quality. With the popularization of assisted reproductive technology and the improvement of clinical requirements, higher standards have been set for the precision of embryo transfer catheters.

[0003] Currently, traditional catheters are usually operated manually. During the embryo loading process, a large number of air bubbles can easily enter the inner tube with the embryo. During the transfer, these air bubbles can damage the embryo implantation environment and affect its development. Furthermore, the impact force generated when the air bubbles are rapidly expelled can lead to cell apoptosis, significantly reducing the embryo survival rate. The stability of the embryo transfer process is difficult to guarantee.

[0004] Therefore, this invention proposes a micro-injection embryo transfer catheter to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a micro-injection embryo transfer catheter to solve the problem in the prior art where air bubbles easily enter the inner tube with the embryo during embryo loading, damaging the embryo implantation environment and affecting its development.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A micro-injection embryo transfer catheter includes an inner tube, a needle connector, a sheath, and an injection device. The inner tube is connected to the end of the needle connector, and the sheath is connected to the outer periphery of the inner tube. The sheath has a sliding channel corresponding to the inner tube, and a positioning ring is connected to the end of the sliding channel. The end of the sheath has a locking groove corresponding to the needle connector. The sheath includes a handle and a guide, which are longitudinally connected. The guide is elliptical in shape and has a guide slope with a chamfer at its end. The injection device includes a syringe, a piston, and a push rod. The piston is sealed to the end of the push rod, and the push rod is slidably connected inside the syringe. The end of the piston has an air buffer chamber.

[0008] Furthermore, a damping adjustment mechanism is connected between the syringe and the push rod.

[0009] Furthermore, the end of the syringe is connected to a connecting connector, the needle tube connector is threaded into the connecting connector, and the end of the sheath is also provided with a snap-fit ​​groove corresponding to the connecting connector, and a sealing gasket is connected in the snap-fit ​​groove.

[0010] Furthermore, a cross-shaped reinforcing plate is connected to the periphery of the needle connector, and the sheath has a slot corresponding to the cross-shaped reinforcing plate.

[0011] Furthermore, a steel pipe insert is coaxially connected inside the sliding pipe, and the steel pipe insert is fixedly connected to the sheath.

[0012] Furthermore, the handle is cylindrical, and anti-slip textures are provided on the periphery of the handle.

[0013] Furthermore, positioning plates are symmetrically connected to the guide portion, the positioning plates are arranged in an arc shape, and multiple positioning frames are connected between the positioning plates and the guide portion.

[0014] In summary, compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. The air buffer chamber at the piston end of this utility model can buffer internal pressure fluctuations when the push rod pushes at different speeds, preventing the culture medium from generating bubbles due to sudden pressure changes and reducing the possibility of bubbles entering the inner tube with the embryo.

[0016] 2. The damping adjustment mechanism between the syringe and the plunger of this utility model can control the sliding resistance of the plunger, allowing the operator to adjust the plunger pushing speed according to needs, maintain the stability of the injection process, and prevent the formation of bubbles due to sudden speed changes.

[0017] 3. The sheath and needle connector of this utility model are connected by a snap-fit ​​groove, a sealing gasket and a cross-shaped reinforcing plate to form a multi-seal structure, which can effectively prevent outside air from entering the inner tube, avoid air bubbles from contaminating the embryo implantation environment, enhance the connection strength between the needle connector and the sheath, and ensure the stability during operation.

[0018] 4. The steel pipe insert fixed coaxially inside the sheathed sliding pipe of this utility model can provide rigid support and positioning for the inner pipe, thus preventing deformation of the inner pipe during operation.

[0019] 5. The handle of the protective sleeve of this utility model is cylindrical and has anti-slip texture on the periphery, which can increase the friction when the operator holds it and facilitate stable control.

[0020] 6. The guide part of this utility model is elliptical and has a guide slope and chamfer at the end, which can reduce the resistance of the device entering the target transplantation site and reduce damage to the tissue. At the same time, it works with the ultrasound probe held by the positioning plate to achieve precise positioning of the transplantation position. Attached Figure Description

[0021] Figure 1 This is the front view of the present invention;

[0022] Figure 2 This is a partial cross-sectional view of the main view of this utility model;

[0023] Figure 3 A three-dimensional schematic diagram of the sheath;

[0024] Figure 4 for Figure 1 Top view;

[0025] In the diagram: 1. Inner tube; 2. Needle connector; 3. Sheath; 4. Handheld part; 5. Guide part; 6. Sliding tube; 7. Positioning ring; 8. Snap-fit ​​groove; 9. Syringe; 10. Piston; 11. Push rod; 12. Air buffer chamber; 13. Damping adjustment mechanism; 14. Connecting joint; 15. Sealing gasket; 16. Cross-shaped reinforcing plate; 17. Snap-fit ​​groove; 18. Steel tube insert; 19. Anti-slip texture; 20. Positioning plate; 21. Positioning frame. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] In this application, the terms "upper," "inner," "outer," "middle," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0028] like Figure 1-4As shown, a micro-injection embryo transfer catheter includes an inner tube 1, a needle connector 2, a sheath 3, and an injection device. The inner tube 1 is connected to the end of the needle connector 2, and the sheath 3 is connected to the outer periphery of the inner tube 1. The sheath 3 has a sliding channel 6 corresponding to the inner tube 1, and a positioning ring 7 is connected to the end of the sliding channel 6. A steel tube insert 18 is coaxially connected inside the sliding channel 6, and the steel tube insert 18 is fixedly connected to the sheath 3. The end of the sheath 3 has a locking groove 8 corresponding to the needle connector 2. The sheath 3 includes a handle 4 and a guide 5, which are longitudinally connected. The guide 5 is elliptical in shape, and a guide slope with a chamfer is provided at the end of the guide 5. A positioning plate 20 is symmetrically connected to the guide 5, and the positioning plate 20 is arc-shaped. Multiple positioning brackets 21 are connected between the positioning plate 20 and the guide 5. The handle 4 is cylindrical, and anti-slip textures 19 are provided on its periphery.

[0029] Furthermore, the injection device includes a syringe 9, a piston 10, and a push rod 11. The piston 10 is sealed to the end of the push rod 11, and the push rod 11 is slidably connected inside the syringe 9. An air buffer chamber 12 is provided at the end of the piston 10. A damping adjustment mechanism 13 is connected between the syringe 9 and the push rod 11.

[0030] Furthermore, the end of the syringe 9 is connected to a connecting connector 14, and the needle tube connector 2 is threaded into the connecting connector 14. The end of the sheath 3 is also provided with a snap-fit ​​groove 8 corresponding to the connecting connector 14, and a sealing gasket 15 is connected in the snap-fit ​​groove 8. A cross-shaped reinforcing plate 16 is connected to the periphery of the needle tube connector 2, and the sheath 3 is provided with a snap-fit ​​groove 17 corresponding to the cross-shaped reinforcing plate 16.

[0031] The working process of this utility model is as follows:

[0032] First, the sheath 3 is fitted onto the outer periphery of the inner tube 1, so that the sliding pipe 6 on the sheath 3 is coaxially connected with the inner tube 1. The steel pipe insert 18 is fixedly connected inside the sliding pipe 6, which can support and position the inner tube 1, reduce the deformation of the inner tube 1, and provide a stable channel for subsequent embryo delivery. Then, the syringe 9 of the injection device is threadedly connected to the needle tube connector 2 through the connecting connector 14. At the same time, the snap-fit ​​groove 8 at the end of the sheath 3 is engaged with the connecting connector 14. The sealing gasket 15 in the snap-fit ​​groove 8 can enhance the sealing of the connection. Then, the cross-shaped reinforcing plate 16 on the periphery of the needle tube connector 2 is embedded in the snap-fit ​​groove 17 of the sheath 3, further fixing the relative position of the needle tube connector 2 and the sheath 3, and preventing the device from shaking and generating air bubbles during operation.

[0033] The embryo is then loaded, and the push rod 11 is pushed, causing the piston 10 to move within the syringe 9. The culture medium containing the embryo is drawn from the syringe 9 through the needle connector 2 into the inner tube 1. The air buffer chamber 12 at the end of the piston 10 in the injection device then functions. When the push rod 11 suddenly accelerates, the air buffer chamber 12 temporarily stores some gas, preventing the culture medium from being rapidly squeezed and generating bubbles. When the speed decreases, the gas in the buffer chamber is slowly released, maintaining stable pressure and reducing the possibility of bubbles entering the inner tube 1 with the embryo. Furthermore, the damping adjustment mechanism 13 between the syringe 9 and the push rod 11 can adjust the sliding resistance of the push rod 11 according to actual needs, thereby controlling the smoothness of the push rod 11's pushing speed and preventing sudden speed changes that could lead to bubble formation.

[0034] An ultrasound probe is then clamped between the positioning plates 20 of the guide section 5. Multiple positioning frames 21 fix the positioning plates 20 to the guide section 5. The ultrasound probe allows for real-time observation of the embryo transfer position, ensuring transfer accuracy. The operator holds the handle 4, whose anti-slip texture 19 increases friction for stable operation. Holding the handle 4, the operator uses the elliptical design of the guide section 5 and the guide bevel and chamfer at the end to guide the device into the transfer site, reducing tissue damage. Under the guidance of the ultrasound probe, the transfer position is precisely located.

[0035] Then, the push rod 11 is slowly pushed to inject the culture medium containing the embryo into the target position through the inner tube 1. During the entire injection process, the air buffer chamber 12 continuously buffers the pressure changes, the damping adjustment mechanism 13 ensures that the push rod 11 is pushed smoothly, and the steel tube insert 18 and the positioning ring 7 maintain the stability of the inner tube 1. This can effectively prevent air bubbles from entering the inner tube 1 with the embryo, avoid damaging the embryo implantation environment, and ensure the normal development of the embryo.

Claims

1. A micro-injection embryo transfer catheter, comprising an inner tube (1), a needle connector (2), a sheath (3), and an injection device, characterized in that, The inner tube (1) is connected to the end of the needle connector (2), and the sheath (3) is connected to the outer periphery of the inner tube (1). The sheath (3) has a sliding channel (6) corresponding to the inner tube (1). The end of the sliding channel (6) is connected to a positioning ring (7). The end of the sheath (3) has a snap-fit ​​groove (8) corresponding to the needle connector (2). The sheath (3) includes a hand-held part (4) and a guide part (5). The hand-held part (4) and the guide part (5) are longitudinally connected. The guide part (5) is elliptical. The end of the guide part (5) has a guide slope. The guide slope has a chamfer. The injection device includes a syringe (9), a piston (10), and a push rod (11). The piston (10) is sealed to the end of the push rod (11). The push rod (11) is slidably connected inside the syringe (9). The end of the piston (10) has an air buffer chamber (12).

2. The micro-injection embryo transfer catheter according to claim 1, characterized in that, A damping adjustment mechanism (13) is connected between the syringe (9) and the push rod (11).

3. The micro-injection embryo transfer catheter according to claim 1, characterized in that, The end of the syringe (9) is connected to a connector (14), the needle tube connector (2) is threaded into the connector (14), and the end of the sheath (3) is also provided with a snap-fit ​​groove (8) corresponding to the connector (14), and a sealing gasket (15) is connected in the snap-fit ​​groove (8).

4. The micro-injection embryo transfer catheter according to claim 1, characterized in that, The needle connector (2) is connected to a cross-shaped reinforcing plate (16) on its periphery, and the sheath (3) is provided with a slot (17) corresponding to the cross-shaped reinforcing plate (16).

5. The micro-injection embryo transfer catheter according to claim 1, characterized in that, A steel pipe insert (18) is coaxially connected inside the sliding pipe (6), and the steel pipe insert (18) is fixedly connected to the sheath (3).

6. The micro-injection embryo transfer catheter according to claim 1, characterized in that, The hand-held part (4) is cylindrical, and anti-slip texture (19) is provided on the periphery of the hand-held part (4).

7. The micro-injection embryo transfer catheter according to claim 1, characterized in that, The guide part (5) is symmetrically connected with positioning plates (20), the positioning plates (20) are arranged in an arc shape, and multiple positioning frames (21) are connected between the positioning plates (20) and the guide part (5).

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