A kind of assisted pregnancy catheter transport structure

Abstract

The utility model discloses a fertility-aiding catheter transport structure, including a double-lumen catheter, a multi-section temperature-controlled memory bending structure, a radio frequency heating system, a temperature sensing feedback device, a detachable semen chamber, and a blocking insulation sheath. The catheter transport structure uses temperature-controlled memory alloy materials and radio frequency heating technology to achieve accurate positioning and full bending of the catheter tip in the fallopian tube, thereby improving the efficiency and safety of extrauterine artificial insemination. The utility model has a novel structure, is easy to operate, safe and reliable, and is expected to significantly improve the success rate of extrauterine artificial insemination, and has broad clinical application prospects.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and in particular to a pregnancy-aiding catheter transport structure. Background Art

[0002] Artificial insemination is a commonly used assisted reproductive technology. Its basic principle is to inject semen into the female reproductive tract to allow sperm to combine with eggs to achieve conception. Artificial insemination can be divided into two methods: intrauterine artificial insemination and extrauterine artificial insemination. Extrauterine artificial insemination is to inject semen directly into the fallopian tube, which can increase the chance of sperm and egg combining.

[0003] At present, artificial insemination outside the uterine cavity often uses a fertility catheter to transport and inject semen. Existing fertility catheters are usually single-lumen structures with a sperm injection hole at the tip of the catheter. Doctors need to rely on their experience and skills to insert the tip of the catheter into the opening of the fallopian tube under the guidance of B-ultrasound or X-rays, and then slowly push the semen. However, the opening of the fallopian tube is deep, and it is difficult to accurately position the tip of the catheter; and the lumen of the fallopian tube is curved, making it difficult for the catheter to penetrate deeply, and the contact area between the semen and the fallopian tube mucosa is small, which affects the fertilization effect.

[0004] The existing assisted reproductive catheter has some shortcomings in the process of semen transport and injection: the catheter is difficult to insert and position, which can easily cause damage to the fallopian tube mucosa; the catheter head cannot be bent to adapt to the fallopian tube, and the depth of semen injection is not enough; the semen is not in sufficient contact with the fallopian tube wall, which affects the fertilization rate; the catheter has a small inner diameter, the semen flow resistance is large, and the injection time is long; the catheter material has poor flexibility and is inflexible to operate. These factors have reduced the success rate of extrauterine insemination. Therefore, it is necessary to develop a new type of assisted reproductive catheter that can achieve accurate positioning and full bending of the catheter head in the fallopian tube, expand the contact area between semen and the fallopian tube, improve semen transportation efficiency, and reduce damage to the fallopian tube, thereby significantly improving the pregnancy rate of extrauterine insemination. Utility Model Content

[0005] In order to solve the problems of the prior art, the embodiment of the utility model provides a pregnancy-aiding catheter transport structure. The technical solution is as follows:

[0006] On the one hand, a fertility catheter transport structure is provided, including a double-lumen catheter body, a multi-section temperature-controlled memory bending structure, a radio frequency heating system, a temperature sensing feedback device, a semen chamber and a blocking insulation sheath, wherein the double-lumen catheter body is made of medical-grade polyurethane material, and is provided with a parallel semen delivery cavity and a functional element arrangement cavity, and the two cavities merge into a semen chamber at the catheter head end; the multi-section temperature-controlled memory bending structure is selectively arranged along the catheter axis, and each section is formed by an annular winding of a nickel-titanium shape memory alloy wire with a preset bending angle; the radio frequency heating system is provided with a radio frequency heating microcoil in each bending section for local heating to trigger bending; the temperature sensing feedback device is provided with a temperature sensor in each bending section to monitor the temperature of the bending section; the semen chamber is detachably connected to the catheter head end, and the cavity wall is provided with staggered semen outlet micropores; the blocking insulation sheath is made of flexible silicone material, is sleeved on the outer periphery of the catheter, is filled with physiological saline, and deforms with the bending of the catheter to reduce the friction between the catheter and the fallopian tube wall.

[0007] Furthermore, the inner diameter of the semen delivery cavity of the double-lumen catheter body is 0.8 mm, the inner diameter of the functional element arrangement cavity is 0.4 mm, the outer diameter of the catheter is 1.5 mm, and the length is 30 cm.

[0008] Furthermore, the multi-section temperature-controlled memory bending structure includes 3-4 bending sections, each section is 2 cm long and the section spacing is 1 cm; the nickel-titanium alloy wire diameter of each bending section is 0.1 mm, the winding density is 800 turns / m, the preset bending angles are 90°, 45°, 30° and 15° respectively, and it is wrapped with a flexible silicone insulation layer with a thickness of 0.2 mm.

[0009] Furthermore, the semen chamber is made of medical-grade PEEK material, is cylindrical in shape, and has a volume of 20 μl; semen outlet micropores with a diameter of 0.2 mm are opened on the cylindrical surface of the chamber, and the hole spacing is 0.1 mm, distributed in a staggered array; a threaded structure that cooperates with the catheter head is provided at one end of the chamber for easy disassembly and cleaning.

[0010] Furthermore, the control system is a portable all-in-one machine with a built-in radio frequency generator, a temperature feedback controller and an electric injection pump. It is equipped with a color touch screen and a voice prompt function, which can display and broadcast parameters such as catheter temperature, bending angle, injection volume, etc. in real time, and has self-checking and fault alarm functions.

[0011] The beneficial effects brought by the technical solution provided by the embodiment of the utility model are:

[0012] 1. The double-lumen catheter design is adopted to separate the semen delivery and functional components to avoid the influence of radio frequency heating on semen quality. At the same time, the inner diameter of the catheter is increased to reduce the semen delivery resistance and improve the injection efficiency.

[0013] 2. The multi-section temperature-controlled memory bending structure utilizes the characteristics of shape memory alloy materials and achieves precise bending of the catheter tip through radio frequency heating, so that it can fit the course of the fallopian tube, significantly improve the flexibility and adaptability of the catheter tip, and reduce stimulation and damage to the fallopian tube mucosa.

[0014] 3. The semen chamber adopts a detachable design, which is convenient for postoperative cleaning and disinfection to avoid cross infection. The multiple semen outlet micropores opened on the chamber wall can achieve uniform dispersion of semen, expand the contact area between semen and fallopian tube wall, and improve the probability of fertilization.

[0015] 4. The cooperation of the radio frequency heating system and the temperature sensing feedback device realizes the precise temperature control of the multi-section temperature-controlled memory bending structure, ensures the safety and reliability of the bending process, and prevents tissue burns caused by excessive temperature.

[0016] 5. The design of the blocking insulation sheath forms a layer of isolation between the catheter tip and the fallopian tube wall, preventing direct contact and friction between the catheter and the fallopian tube wall, further reducing the risk of mucosal damage and improving patient comfort.

[0017] 6. The overall structure adopts modular design, and functional components such as radio frequency generator, temperature feedback controller, electric injection pump, etc. are integrated, which is easy to operate and easy to promote and apply.

[0018] 7. Compared with the existing assisted reproductive catheter, the catheter transport structure of the utility model has a simple manufacturing process, low cost, can be used once, and avoids cross infection.

[0019] In summary, the fertility catheter transport structure provided by the utility model, through a number of innovative structural designs, significantly improves the catheter's precise positioning ability in the fallopian tube and the efficiency of semen delivery, reduces damage to the fallopian tube mucosa, has the advantages of simple operation, safety and reliability, low cost, etc., and is expected to significantly improve the success rate of extrauterine artificial insemination, and has broad clinical application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a schematic diagram of a module of a pregnancy-aiding catheter transport structure according to an embodiment of the utility model;

[0022] Figure 2 This is a schematic structural diagram of a pregnancy-aiding catheter transport structure according to an embodiment of the utility model;

[0023] Figure 3 It is a schematic diagram of a bending section according to an embodiment of the utility model. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0025] like Figure 1 As shown, the utility model provides a fertility-aiding catheter transport structure, including a double-lumen catheter body 1, a multi-section temperature-controlled memory bending structure 2, a radio frequency heating system 3, a temperature sensor feedback device 4, a semen chamber 5 and a blocking insulation sheath 6.

[0026] The double-lumen catheter body 1 is made of medical-grade polyurethane material, and is provided with a parallel semen delivery cavity 11 and a functional element arrangement cavity 12, and the two cavities merge into a semen chamber 5 at the catheter head end. The inner diameter of the semen delivery cavity 11 of the catheter body 1 is 0.8 mm, the inner diameter of the functional element arrangement cavity 12 is 0.4 mm, the outer diameter of the catheter is 1.5 mm, and the length is 30 cm. It has good flexibility and is easy to insert into the fallopian tube through the vagina and cervix.

[0027] The multi-section temperature-controlled memory bending structure 2 selectively sets 3-4 bending sections 21 along the axial direction of the catheter, each section is 2 cm long, and the distance between sections is 1 cm. Each bending section 21 is formed by annularly winding a nickel-titanium shape memory alloy wire 22 with a preset bending angle, the wire diameter is 0.1 mm, and the winding density is 800 turns / m. The preset bending angles of each bending section are 90°, 45°, 30° and 15°, respectively, giving the catheter head end higher flexibility to adapt to different fallopian tube courses. The bending section 21 is coated with a flexible silicone insulation layer 23 with a thickness of 0.2 mm.

[0028] The radio frequency heating system 3 sets a radio frequency heating micro coil 31 in each bending section 21, with 20-30 turns and a coil wire diameter of 0.05 mm. The micro coils 31 are respectively connected to the radio frequency generator (not shown in the figure) at the tail end of the catheter, and the power-on heating of each coil is independently controlled by the control system. When the temperature reaches above 45°C, the bending of the corresponding bending section is triggered.

[0029] The temperature sensing feedback device 4 is provided with a platinum resistance temperature sensor 41 (PT1000) at the center of each bending section 21, with a sensing range of -50°C to 300°C and an accuracy of ±0.1°C. The sensor 41 is connected to a temperature feedback controller (not shown) at the tail end of the catheter through a lead wire in the functional element arrangement cavity 12, and monitors the temperature of the bending section in real time, controls the radio frequency heating power, and prevents tissue burns caused by excessive temperature.

[0030] The semen chamber 5 is made of medical grade PEEK material, cylindrical, 5mm long, 1.2mm outer diameter, and 20μl in volume. One end of the chamber is threadedly connected to the catheter head for easy disassembly and cleaning; the other end is blind, with a semen ejection hole 52 with a diameter of 0.5mm in the center. The cylindrical surface of the chamber is provided with multiple semen outlet micropores 51 with a diameter of 0.2mm, with a hole spacing of 0.1mm, and evenly distributed in a staggered array to ensure that the semen is fully in contact with the fallopian tube.

[0031] The blocking heat-insulating sheath 6 is made of flexible silicone material and is sleeved on the outer periphery of the head end to the middle section of the catheter body 1. The sheath wall thickness is 0.3mm, and the gap between the sheath and the outer wall of the catheter is 0.1mm. The sheath is filled with physiological saline. One end of the blocking sheath 6 fits tightly with the base of the semen chamber 5 and bends and deforms with the catheter, reducing the direct friction between the catheter and the fallopian tube wall and reducing the risk of mucosal damage.

[0032] When in use, the fertility catheter is first inserted into the fallopian tube through the vagina and cervix to a depth of about 25 cm. The position and angle of the catheter head are adjusted under the guidance of B-ultrasound so that the semen chamber 5 is aligned with the fallopian tube opening. The radio frequency heating system 3 is triggered by the control system. When the temperature reaches 45-50°C, the multi-section temperature-controlled memory bending structure 2 is quickly bent so that the catheter head fits the fallopian tube and the semen chamber 5 faces the fallopian tube cavity accurately. The temperature sensing feedback device 4 monitors in real time to prevent the temperature from being too high and maintain the bending state. Then, 20 μl of semen is slowly and uniformly injected through the semen delivery system (not shown in the figure) for 2 minutes. The semen is fully in contact with the fallopian tube cavity through the micropores 51 on the wall of the semen chamber 5 and diffuses. After the injection of semen is completed, the radio frequency heating is stopped, and the catheter automatically restores a straight line shape under the protection of the blocking insulation sheath 6 and slowly withdraws from the uterine cavity. The whole process is automatically completed by the control system, and the operation steps are prompted by voice.

[0033] The assisted reproductive catheter transport structure provided in this embodiment cleverly combines shape memory alloy materials, radio frequency heating technology and precise temperature control system, achieving precise bending positioning of the catheter tip in the fallopian tube and sufficient transport and diffusion of semen, effectively improving the efficiency and safety of artificial insemination. The multi-section temperature-controlled memory bending structure gives the catheter greater flexibility to adapt to the different courses of fallopian tubes; the dual-cavity isolation design and blocking insulation sheath avoid the impact of radio frequency heating on semen quality and fallopian tube mucosa; the detachable semen chamber facilitates postoperative cleaning. The catheter transport structure has a reasonable manufacturing process, moderate cost, and can be used once, and is expected to be widely used in the field of artificial insemination.

[0034] It should be noted that the specific models and parameters of the radio frequency heating system 3, the temperature sensing feedback device 4 and the control system in this embodiment can be adjusted according to actual needs, as long as the controllable bending and temperature monitoring feedback of the temperature-controlled memory bending structure can be achieved. In addition, although this embodiment takes a 3-4-section temperature-controlled memory bending structure as an example, the number of sections is not limited to this, and can be appropriately increased or decreased according to the actual length and bending of the fallopian tube. Similarly, the volume of the semen chamber and the size and distribution of the micropores can also be optimized and adjusted to obtain the best semen transport and diffusion effect.

[0035] In summary, the assisted reproductive catheter transport structure provided by the utility model has made many innovations in structural design and functional realization, overcomes the shortcomings of the prior art, can significantly improve the success rate of artificial insemination, and has broad application prospects. Those skilled in the art can make various improvements and optimizations to the utility model based on the above description, and these improvements and optimizations should be deemed to fall within the protection scope of the utility model.

Claims

1. A fertility-aiding catheter transport structure, comprising a double-lumen catheter body, a multi-section temperature-controlled memory bending structure, a radio frequency heating system, a temperature sensor feedback device, a semen chamber and a blocking insulation sheath, characterized in that The double-lumen catheter body is made of medical-grade polyurethane material, and is provided with a parallel semen delivery cavity and a functional element arrangement cavity, and the two cavities merge into a semen chamber at the catheter head end; the multi-section temperature-controlled memory bending structure is selectively arranged along the axial direction of the catheter, and each section is formed by an annular winding of a nickel-titanium shape memory alloy wire with a preset bending angle; the radio frequency heating system is provided with a radio frequency heating microcoil in each bending section for local heating to trigger bending; the temperature sensing feedback device is provided with a temperature sensor in each bending section to monitor the temperature of the bending section; the semen chamber is detachably connected to the catheter head end, and the cavity wall is provided with staggered semen outlet micropores; the blocking insulation sheath is made of flexible silicone material, which is sleeved on the outer periphery of the catheter and filled with physiological saline. It bends and deforms with the catheter to reduce the friction between the catheter and the fallopian tube wall.

2. The fertility-aiding catheter transport structure according to claim 1, characterized in that The inner diameter of the semen delivery cavity of the double-lumen catheter body is 0.8 mm, the inner diameter of the functional element arrangement cavity is 0.4 mm, the outer diameter of the catheter is 1.5 mm, and the length is 30 cm.

3. The fertility-aiding catheter transport structure according to claim 1, characterized in that The multi-section temperature-controlled memory bending structure includes 3-4 bending sections, each section is 2 cm long and the section spacing is 1 cm; the nickel-titanium alloy wire diameter of each bending section is 0.1 mm, the winding density is 800 turns / m, the preset bending angles are 90°, 45°, 30° and 15° respectively, and it is wrapped with a flexible silicone insulation layer with a thickness of 0.2 mm.

4. The fertility-aiding catheter transport structure according to claim 1, characterized in that :The semen chamber is made of medical-grade PEEK material, is cylindrical in shape, and has a volume of 20μl; semen outlet micropores with a diameter of 0.2mm are opened on the cylindrical surface of the chamber, and the hole spacing is 0.1mm, which are distributed in a staggered array; a threaded structure that cooperates with the catheter head is provided at one end of the chamber for easy disassembly and cleaning.

5. The fertility-aiding catheter transport structure according to claim 1, characterized in that : It also includes a control system, which is a portable all-in-one machine with a built-in radio frequency generator, a temperature feedback controller and an electric injection pump. It is equipped with a color touch screen and a voice prompt function, which can display and broadcast the catheter temperature, bending angle, and injection volume in real time, and has self-checking and fault alarm functions.

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