Fallopian tube contrast medium injection device with pressure feedback and automatic constant temperature function

Abstract

This invention relates to the field of medical device technology and discloses a fallopian tube contrast agent injection device with pressure feedback and automatic constant temperature function. The device includes a support, a fixed rod fixedly connected to the top of the support, a placement box rotatably connected to the outside of the fixed rod, and a booster mechanism inside the placement box. This booster mechanism is used to provide secondary boosting of the contrast agent under pressure feedback. A medicine container is fixedly connected to the top of the placement box, a needle is fixedly connected to the top of the placement box, and an infusion tube is fixedly connected to the top of the needle. This invention uses a motor-driven gear transmission to move a lead screw and piston, achieving uniform delivery of the contrast agent. When the pressure is too high, a cylinder switches the gear meshing relationship to reduce the rotation speed and slow down the delivery speed. This improves upon the problems of unstable pressure and excessively fast flow rates in traditional contrast agent delivery methods, which can cause patient discomfort or safety risks. It enhances the stability, controllability, and safety of the contrast agent delivery process and achieves adaptive pressure adjustment.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a fallopian tube contrast agent injection device with pressure feedback and automatic constant temperature function. Background Technology

[0002] Hysterosalpingography (HSG) is a routine gynecological procedure used to check the patency of the fallopian tubes and identify the site of any blockage. During the procedure, medical staff inject a contrast agent into the patient's uterine cavity and fallopian tubes through a catheter, followed by observation of the fluid's flow and distribution using X-ray or ultrasound. Currently, most clinical procedures rely on manual injection using a syringe or a basic, rate-controlled infusion pump. However, due to the narrow lumens of the uterus and fallopian tubes and their extreme sensitivity to external stimuli, existing injection methods and devices have significant limitations in practical clinical application.

[0003] Regarding the control of injection pressure, conventional injection devices typically lack real-time monitoring of intratubular resistance and mechanical feedback adjustment mechanisms. When patients have pathological adhesions or structural obstructions in their fallopian tubes, continuous forced injection can cause a sudden increase in fluid pressure within the uterine cavity and tubing. This transient high-pressure impact can not only trigger unexpected backflow of the contrast agent under pressure but also cause substantial physical damage to the fragile fallopian tube walls, leading to severe pain and secondary infections in the patient. Furthermore, conventionally stored contrast agents are usually at room temperature before injection, creating a significant temperature difference with the body's core temperature. When this fluid with a significant temperature difference directly contacts the endometrium and fallopian tube mucosa, it can induce stress-induced contractions and spasms in the local smooth muscle. This physical spasm, caused by the lack of a dynamic isothermal mechanism, not only significantly increases the patient's examination discomfort but can also create a false impression of increased resistance on subsequent medical imaging, leading to a misdiagnosis of false obstruction. Meanwhile, existing injection catheters, with their fixed external structure, lack radial contraction and relaxation capabilities during insertion into the uterine cavity through the cervix. The rigid catheter body can cause friction and scratches to the cervical wall during insertion; furthermore, once insertion is complete and injection pressure is established, the fixed-diameter catheter cannot effectively seal against the physiologically varied cervical os. This causes some contrast agent to leak directly into the vagina along the catheter's outer wall under internal back pressure, directly reducing the effective contrast dose reaching the target area and affecting the final contrast quality and diagnostic accuracy. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a fallopian tube contrast agent injection device with pressure feedback and automatic constant temperature functions. This solves the problems of existing fallopian tube contrast agent injection devices, which lack real-time pressure feedback and constant temperature mechanisms during operation. These problems include transient high pressure damaging tissues, cold drug stimulation causing smooth muscle spasms, and fixed-shape catheters causing cervical abrasions and difficulty in effectively sealing and preventing leakage.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a fallopian tube contrast agent injection device with pressure feedback and automatic temperature control, comprising a support, a fixed rod fixedly connected to the top of the support, a placement box rotatably connected to the outside of the fixed rod, a boosting mechanism inside the placement box for secondary boosting of the contrast agent under pressure feedback, a medicine container fixedly connected to the top of the placement box, a needle fixedly connected to the top of the placement box, an infusion tube fixedly connected to the top of the needle, a contraction mechanism fixedly connected to the outside of the infusion tube for preventing the contrast agent from flowing out of the fallopian tube, and an adjustment mechanism fixedly connected to the outside of the placement box for automatic adjustment of the feedback pressure and the contrast agent temperature.

[0006] Preferably, the booster mechanism includes a support plate, which is fixedly connected to the inside of the placement box. A motor is fixedly connected to the inside of the placement box, and a rotating shaft is fixedly connected to the output end of the motor. A first main gear is fixedly connected to the outside of the rotating shaft, and a first driven wheel is fixedly connected to the outside of the rotating shaft. A rotating shaft is rotatably connected inside the support plate, and a guide plate is fixedly connected to the outside of the rotating shaft. A sleeve is slidably connected to the outside of the guide plate, and a second driven wheel is fixedly connected to the outside of the sleeve. A second main gear is fixedly connected to the outside of the sleeve. A cylinder is fixedly connected to the inside of the placement box, and a connecting plate is fixedly connected to the output end of the cylinder. The first main gear and the second driven wheel mesh with each other. A lead screw is fixedly connected to the top of the rotating shaft, and a piston is threadedly connected to the outside of the lead screw.

[0007] Preferably, the contraction mechanism includes a conical sleeve, which is fixedly connected to the outside of the infusion tube. Multiple fixed plates are fixedly connected to the inside of the conical sleeve. A movable ring is slidably connected to the outside of the infusion tube. A connecting rod is rotatably connected inside the multiple fixed plates. A pull rod is fixedly connected to the top of the movable ring. A slider is slidably connected to the outside of the infusion tube.

[0008] Preferably, the adjustment mechanism includes a display screen, which is fixedly connected to the outside of the placement box. A detector is fixedly connected to the outside of the infusion tube. Heating sleeves are fixedly connected to the outside of both the medicine container and the syringe. A temperature sensor is fixedly connected to the outside of the heating sleeve, and a circuit is fixedly connected to the bottom of the temperature sensor.

[0009] Preferably, the other end of the connecting plate is sleeved on the outside of the sleeve, and the piston is slidably connected inside the needle tube.

[0010] Preferably, the other end of the pull rod is fixedly connected to the bottom of the slider, and the end of the connecting rod away from the conical sleeve is rotatably connected to the outside of the movable ring.

[0011] Preferably, the bottom of the bracket is fixedly connected to multiple casters, which are arranged in a rectangular array, and each caster is provided with a brake locking component.

[0012] Preferably, the rotating shaft is rotatably connected inside the support plate, and the connecting plate is slidably connected inside the support plate.

[0013] Preferably, the regulating mechanism has a built-in pressure control module, which is configured to receive the pressure resistance signal in the fallopian tube in real time and adjust the propulsion rate of the booster mechanism synchronously according to the resistance signal to maintain the dynamic balance of the contrast agent injection pressure.

[0014] Preferably, the temperature sensor is electrically connected to the heating jacket via the circuit to form a temperature monitoring feedback closed loop, and the detector is electrically connected to the display screen to display the monitored pipe pressure data on the display screen in real time.

[0015] This invention provides a fallopian tube contrast agent injection device with pressure feedback and automatic temperature control. It has the following beneficial effects: 1. This invention uses a motor-driven gear transmission to move the lead screw and piston, achieving uniform delivery of contrast agent. When the pressure is too high, the cylinder switches the gear meshing relationship to reduce the rotation speed and slow down the delivery speed. This improves the problems of unstable pressure and excessive flow rate that can cause patient discomfort or safety risks in traditional contrast agent delivery. It enhances the stability, controllability and safety of the contrast agent delivery process and achieves adaptive pressure adjustment.

[0016] 2. This invention uses a slider to drive a movable ring and a linkage mechanism to control the contraction and opening of the rubber conical sleeve, which improves the problems of damage to the cervical wall and leakage of contrast agent when the imaging device enters the uterine cavity, thus improving the safety of operation and the imaging effect.

[0017] 3. This invention achieves dual-effect closed-loop control of temperature and pressure during contrast agent injection by integrating a pressure control module and a temperature control module into the adjustment mechanism. On one hand, based on the real-time resistance signal collected by the detector, the system triggers the cylinder to change the meshing state of the internal gears when the pressure inside the tube exceeds the threshold, forcibly reducing the linear speed of the injection piston, thereby mitigating the transient impact of high pressure and avoiding damage to patient tissues. On the other hand, combined with a heating jacket, temperature sensor, and environmental thermal resistance compensation model, the system dynamically adjusts the duty cycle of the heating element to offset heat loss from the tube wall. This mechanism maintains a constant temperature of the drug solution while preventing high-pressure mechanical impact, ensuring the safety and physicochemical stability of the contrast agent injected into the human body. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention; Figure 2 A schematic diagram illustrating the structure of the adjustment mechanism of the present invention is provided. Figure 3 A schematic diagram illustrating the structure of the booster mechanism of the present invention is provided. Figure 4 To highlight the present invention Figure 3 Enlarged view of point A in the middle; Figure 5 A schematic diagram illustrating the structure of the main gear of this invention; Figure 6 A schematic diagram illustrating the structure of the retraction mechanism of this invention is provided. Figure 7 To highlight the present invention Figure 6 Enlarged view of point B in the middle; Figure 8 A system block diagram is provided to highlight the adjustment mechanism of one embodiment of the present invention.

[0019] The components include: 1. Bracket; 2. Casters; 3. Fixing rod; 4. Placement box; 5. Medicine container; 6. Syringe; 7. Infusion tube; 8. Pushing mechanism; 81. Support plate; 82. Motor; 83. First main gear; 84. First driven wheel; 85. Rotating shaft; 86. Second driven wheel; 87. Second main gear; 88. Connecting plate; 89. Cylinder; 810. Lead screw; 811. Piston; 812. Rotating shaft; 813. Guide plate; 814. Sleeve; 9. Retraction mechanism; 91. Conical sleeve; 92. Movable ring; 93. Fixing plate; 94. Connecting rod; 95. Pull rod; 96. Slider; 10. Adjustment mechanism; 101. Display screen; 102. Detector; 103. Heating jacket; 104. Temperature sensor; 105. Circuit. Detailed Implementation

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see the appendix Figure 1 -Appendix Figure 7 This invention provides a fallopian tube contrast agent injection device with pressure feedback and automatic temperature control, including a support 1, a fixed rod 3 fixedly connected to the top of the support 1, a placement box 4 rotatably connected to the outside of the fixed rod 3, a boosting mechanism 8 inside the placement box 4, the boosting mechanism 8 being used to provide secondary boosting of the contrast agent under pressure feedback, a medicine container 5 fixedly connected to the top of the placement box 4, a needle 6 fixedly connected to the top of the placement box 4, an infusion tube 7 fixedly connected to the top of the needle 6, a contraction mechanism 9 fixedly connected to the outside of the infusion tube 7, the contraction mechanism 9 being used to prevent the contrast agent from flowing out of the fallopian tube, and an adjustment mechanism 10 fixedly connected to the outside of the placement box 4, the adjustment mechanism 10 being used to automatically adjust the feedback pressure and the temperature of the contrast agent; multiple casters 2 are fixedly connected to the bottom of the support 1, the multiple casters 2 are distributed in a rectangular array, and a brake locking component is provided on the casters 2; Specifically, based on the aforementioned overall structural framework, the support 1 and its bottom casters 2 constitute the basic mobile support platform for the injection device. A brake locking mechanism allows the device to be stably parked in a specific operating position. The fixing rod 3 provides rotational support for the placement box 4, allowing the operator to adjust the spatial orientation of the placement box 4 according to actual clinical needs. The placement box 4, as the core working area, integrates a propulsion mechanism 8, along with the top drug reservoir 5, needle 6, and infusion tubing 7, to form the storage and power delivery path for the contrast agent. The contraction mechanism 9 located outside the infusion tubing 7 and the adjustment mechanism 10 located outside the placement box 4 work together to provide leakage prevention and status monitoring and adjustment functions at the physical morphology level and dynamic temperature and pressure control level, respectively, during the injection of the contrast agent into the patient's body.

[0022] Please see the appendix Figure 3 -Appendix Figure 5In a preferred embodiment of the present invention, the boosting mechanism 8 includes a support plate 81, which is fixedly connected to the inside of the placement box 4. A motor 82 is fixedly connected to the inside of the placement box 4. A rotating shaft 812 is fixedly connected to the output end of the motor 82. A first main gear 83 is fixedly connected to the outside of the rotating shaft 812. A first driven wheel 84 is fixedly connected to the outside of the rotating shaft 812. A rotating shaft 85 is rotatably connected inside the support plate 81. A guide plate 813 is fixedly connected to the outside of the rotating shaft 85. A sleeve 814 is slidably connected to the outside of the guide plate 813. A [missing information - likely a gear or component] is fixedly connected to the outside of the sleeve 814. The second driven wheel 86 and the second main gear 87 are fixedly connected to the outside of the sleeve 814. The cylinder 89 is fixedly connected to the inside of the placement box 4. The output end of the cylinder 89 is fixedly connected to the connecting plate 88. The first main gear 83 and the second driven wheel 86 mesh with each other. The top of the rotating shaft 85 is fixedly connected to the lead screw 810. The lead screw 810 is threadedly connected to the outside of the lead screw 810. The other end of the connecting plate 88 is sleeved on the outside of the sleeve 814. The piston 811 is slidably connected inside the needle tube 6. The rotating shaft 812 is rotatably connected inside the support plate 81. The connecting plate 88 is slidably connected inside the support plate 81. Specifically, regarding the internal transmission logic of the booster mechanism 8, the motor 82 acts as a power source to drive the rotating shaft 812 to rotate, thereby causing the first main gear 83 and the first driven wheel 84 on it to rotate synchronously. With the two gears meshing, the rotational power of the first main gear 83 is transmitted to the second driven wheel 86 on the outside of the sleeve 814, causing the sleeve 814, along with the guide plate 813 and the rotating shaft 85, to rotate as a whole. As the rotating shaft 85 rotates, the lead screw 810 at its top drives the piston 811 to perform a linear injection motion inside the needle tube 6 via threaded transmission. When the system needs to intervene for adjustment based on pressure feedback, the output end of the cylinder 89 pushes the connecting plate 88 to slide within the support plate 81. The linear displacement of the connecting plate 88 forces the sleeve 814 to slide axially along the guide plate 813, thereby changing the original relative position and meshing relationship of the gears, thus achieving a secondary adjustment of the injection state at the mechanical transmission level.

[0023] Please see the appendix Figure 6 -Appendix Figure 7 In a preferred embodiment of the present invention, the contraction mechanism 9 includes a conical sleeve 91, which is fixedly connected to the outside of the infusion tube 7. A plurality of fixed plates 93 are fixedly connected to the inside of the conical sleeve 91. A movable ring 92 is slidably connected to the outside of the infusion tube 7. A connecting rod 94 is rotatably connected inside the plurality of fixed plates 93. A pull rod 95 is fixedly connected to the top of the movable ring 92. A slider 96 is slidably connected to the outside of the infusion tube 7. The other end of the pull rod 95 is fixedly connected to the bottom of the slider 96. The end of the connecting rod 94 away from the conical sleeve 91 is rotatably connected to the outside of the movable ring 92.

[0024] Specifically, based on the common track sliding configuration of slider 96 and movable ring 92 on the outside of infusion tube 7, the contraction mechanism 9 forms a complete mechanical deformation system. When the operating end applies force to make slider 96 slide axially along infusion tube 7, the pull rod 95 rigidly transmits the linear displacement of slider 96 to movable ring 92. The movement of movable ring 92 changes the relative distance between it and front conical sleeve 91, thereby forcing the connecting rod 94, which is hinged at both ends to movable ring 92 and fixed plate 93 respectively, to deflect in a spatial angle. The deflection of connecting rod 94 generates a corresponding radial pushing and pulling force on fixed plate 93, which in turn drives the externally fixed conical sleeve 91 to produce a contraction or opening shape change, thereby achieving the blocking and sealing effect on the fallopian tube opening.

[0025] Please see the appendix Figure 1 -Appendix Figure 2 In a preferred embodiment of the present invention, the adjustment mechanism 10 includes a display screen 101, which is fixedly connected to the outside of the placement box 4. A detector 102 is fixedly connected to the outside of the infusion tube 7. Heating sleeves 103 are fixedly connected to the outside of both the medicine container 5 and the needle tube 6. A temperature sensor 104 is fixedly connected to the outside of the heating sleeve 103. A line 105 is fixedly connected to the bottom of the temperature sensor 104. The adjustment mechanism 10 has a built-in pressure control module, which is configured to receive the pressure resistance signal in the fallopian tube in real time and adjust the pushing rate of the booster mechanism 8 synchronously according to the resistance signal to maintain the dynamic balance of the contrast agent injection pressure. The temperature sensor 104 is electrically connected to the heating sleeve 103 through the line 105 to form a temperature monitoring feedback closed loop. The detector 102 is electrically connected to the display screen 101 to display the monitored tube pressure data on the display screen 101 in real time.

[0026] In this embodiment, refer to the appendix Figure 8 , Figure 8 This is a system block diagram of an adjustment mechanism 10 according to an embodiment of the present invention.

[0027] The regulating mechanism 10 is located on the outside of the placement box 4 and around the corresponding fluid lines, mainly used to achieve closed-loop regulation of resistance and maintenance of the temperature of the liquid inside the lines during the contrast agent injection process. The regulating mechanism 10 includes a display screen 101, a detector 102, a heating jacket 103, a temperature sensor 104, and connecting lines 105. The detector 102 is located on the outer wall of the infusion tube 7 and is used to sense the back pressure resistance of the fluid inside the infusion tube 7 in real time. Specifically, the detector 102 employs a thin-film pressure sensor or a resistance strain gauge-type micro-force sensor, based on the piezoresistive effect or the physical principle of micro-nano deformation, to non-invasively collect the weak deformation of the tube wall and convert it into an analog electrical signal.

[0028] The regulating mechanism 10 is internally equipped with a core pressure control module and a temperature control module, which can be integrated into the same microprocessor or programmable logic controller. The analog resistance signal collected by the detector 102 is processed by the front-end amplification and filtering circuit and the analog-to-digital conversion circuit before being transmitted to the pressure control module. The pressure control module is configured to synchronously adjust the working state of the booster mechanism 8 according to the received real-time resistance signal. Considering that the determination of a single extreme value may be affected by transient noise generated by air bubbles or electromagnetic interference in the fluid pipeline, the pressure control module introduces sliding window filtering logic in the time dimension. Specifically, the pressure control module performs timestamp alignment and weighted averaging on multiple continuously collected real-time resistance signals. Only when the smoothed resistance evaluation value exceeds the preset safety alarm threshold within a continuous preset time period will the pressure control module output a high-level trigger signal to drive the cylinder 89 inside the placement box 4 to move. In addition, the range of the safety alarm threshold is determined based on the upper limit of the normal physiological tolerance pressure of clinical hysterosalpingography, with the preferred range set to 20 kPa to 35 kPa. The extension and retraction of the piston rod of cylinder 89 causes the connecting plate 88 and sleeve 814 to produce linear displacement on the guide plate 813, which causes the first driven wheel 84 to mechanically mesh with the second main gear 87, thereby changing the transmission ratio of the rotating shaft 85. By changing the gear transmission ratio, the actual speed of the rotating shaft 85 is reduced while the output speed of the motor 82 remains unchanged, thereby reducing the linear pushing rate of the piston 811 inside the needle tube 6 and forcibly reducing the pressure in the fallopian tube to a safe range.

[0029] Within the normal injection range of the system (i.e., when cylinder 89 does not trigger mechanical deceleration intervention), to overcome the nonlinear resistance fluctuations caused by the transmission of incompressible fluid in narrow pipes, the pressure control module is equipped with an adaptive speed regulation algorithm unit. This algorithm unit, based on classical closed-loop feedback control theory, calculates the error change between the actual pipe resistance and the target control resistance, and generates dynamic speed regulation commands for motor 82 in real time. The specific speed regulation calculation logic is as follows: ; ; in, The target control resistance preset for the system is set based on the baseline resistance of the uterine cavity in patients without physiological lesions. The real-time tube resistance is collected and calculated by detector 102; This represents the real-time resistance error; The target operating speed is output to the motor 82 driver; The proportional gain coefficient is used to control the algorithm. To control the integral gain coefficient of the algorithm; The differential gain coefficient is used to control the algorithm. This is the current running time; The time variable is the integral time variable. The above gain coefficients... , , The specific value is obtained through step response testing and critical proportional gain tuning before the system leaves the factory. Meanwhile, to prevent integral saturation caused by the pipeline being in a constant high resistance state for a long time, an anti-integral saturation limiting circuit is set within the algorithm unit. When When the calculated value reaches the upper limit of the motor's physical speed of 82, the system automatically pauses the accumulation of the integral term to prevent numerical overflow. The algorithm unit monitors the differential term of the resistance error in real time. When the resistance shows a rapid upward trend, it reduces the target operating speed in advance to avoid transient high-pressure impacts in the pipeline, thereby achieving flexible protection of the patient's fallopian tube tissue at the physical level.

[0030] As a preferred method, in terms of automatic temperature control of the contrast agent, the heating jacket 103 is fixed to the outside of the drug container 5 and the needle 6 in a semi-enclosed or fully enclosed manner. The heating jacket 103 has a built-in flexible polyimide electrothermal film or medical silicone electrothermal wire as the heating element. The temperature sensor 104 is disposed on the inner wall of the heating jacket 103, close to the outer contour of the drug container 5 or the needle 6, and is used to collect real-time temperature data of the contact surface. The temperature sensor 104 and the ambient temperature sensor are both electrically connected to the temperature control module in the adjustment mechanism 10 through the circuit 105, forming a physical-level temperature monitoring feedback closed loop, and maintaining strict alignment of data timestamps during the underlying sampling interruption.

[0031] Based on the general technical principles of Fourier's law of heat conduction and Newton's law of cooling, since the heating jacket 103 is located outside the container, its heat needs to penetrate the container wall to be transferred to the contrast agent, resulting in thermal resistance and heat dissipation. The temperature control module is internally configured with a control equation based on heat conduction compensation. Based on the set target temperature of the contrast agent and the external ambient temperature, it dynamically calculates the external target temperature that the heating jacket 103 needs to maintain. The calculation logic is as follows: ; in, The target control temperature output by the temperature control module to the heating jacket 103; This is the constant and suitable temperature required for contrast agents, and to match the core body temperature of the human body, this value is usually calibrated to 37 degrees Celsius; The real-time ambient temperature of the space where the equipment is located; This is the thermal resistance compensation coefficient. This coefficient is determined by the overall heat dissipation characteristics of the system and the heat transfer characteristics of the vessel wall; essentially, it is the ratio of heat dissipation thermal resistance to heat transfer thermal resistance. Given a fixed system structural size, this coefficient is a positive constant. The underlying algorithm defines this heat transfer coefficient by ensuring the denominator constant is not zero, avoiding singularity in division operations. The temperature control module compares the actual temperature collected by the temperature sensor 104 with the target control temperature, outputting a pulse width modulation signal to adjust the power supply duty cycle of the heating jacket 103, achieving low-power insulation and temperature compensation, effectively avoiding the risk of contrast agent denaturation caused by extreme heating at a single point.

[0032] The display screen 101 is located on the visible outer side of the placement box 4. The outputs of detector 102 and temperature sensor 104 are both electrically connected to the main control board of the display screen 101 via an analog-to-digital converter interface. The pressure control module and temperature control module package the calculated real-time intratubular pressure data, temperature data, injection rate, and system status flags and send them to the main control board of the display screen 101. Relying on the collaborative interaction of the aforementioned multi-source heterogeneous data, the display screen 101 converts the monitored data into digital readings and time-dependent curves for visual display, providing medical personnel with an intuitive status reference. For the generation of drive signals, data rendering, and communication protocol parsing of the display screen 101, those skilled in the art can use conventional liquid crystal driver chips and graphical user interface systems; the hardware construction and interface programming are well-known technologies in the field and will not be elaborated upon here.

[0033] Working principle: When using this device, medical staff first pull the handle to place the support 1, supported by the casters 2, into the designated position, and rotate the placement box 4 on the fixing rod 3 to the appropriate angle. Then, the adjustment mechanism 10 is activated. Subsequently, the contrast agent in the medicine container 5 and the syringe 6 is heated to a suitable temperature by the heating sleeve 103. The temperature sensor 104 and the circuit 105 detect feedback to ensure that the heating sleeve 103 automatically maintains a constant temperature. At this time, the contrast agent in the medicine container 5 is connected to the syringe 6 through the pipeline, and the auxiliary device inside the placement box 4 is activated. The pushing mechanism 8 draws the contrast agent into the needle tube 6, then connects the infusion tube 7 to the needle tube 6, and then places the infusion tube 7 into the cervix. At the same time as insertion, the contraction mechanism 9 is activated to contract and prevent spasms. After reaching the designated position, the contraction mechanism 9 is activated to open and prevent the contrast agent from flowing out. Then, the boosting mechanism 8 is activated to push the contrast agent into the fallopian tube. When the detector 102 on the infusion tube 7 detects that the pressure is too high, its data is transmitted to the display screen 101 and the boosting mechanism 8 is activated to decelerate and avoid damage to the uterine cavity and backflow of the contrast agent. When the contrast agent is delivered, the motor 82 inside the placement box 4 is started, which drives the rotating shaft 812 to rotate inside the support plate 81. This causes the first main gear 83 and the first driven wheel 84 to rotate synchronously, which in turn causes the second driven wheel 86 to rotate synchronously. This causes the rotating shaft 85 and the lead screw 810 inside the second driven wheel 86 to rotate, which in turn causes the piston 811 on the lead screw 810 to move upward. This causes the piston 811 to slide at a constant speed inside the needle tube 6, which delivers the contrast agent in the needle tube 6 to the fallopian tube. When excessive pressure is detected, the cylinder 89 is started, which drives the connecting plate 88 and the sleeve 814 to move upward on the guide plate 813. This causes the first driven wheel 84 and the second main gear 87 to mesh, which slows down the rotation speed of the rotating shaft 85, thereby reducing the pushing speed of the piston 811 and bringing the pressure back to normal. When entering the uterine cavity, slide the slider 96 backward, which in turn drives the pull rod 95 to pull the movable ring 92 to move synchronously. This causes the connecting rod 94, which is hinged at one end to the movable ring 92 and at the other end to the conical sleeve 91, to deflect. This causes the rubber conical sleeve 91 to contract, preventing damage to the cervical wall. When it reaches the cervical os, push the slider 96 in the opposite direction, causing the conical sleeve 91 to open, preventing the contrast agent from flowing out.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fallopian tube contrast agent injection device with pressure feedback and automatic constant temperature function, comprising a stent (1), characterized in that, The support (1) is fixedly connected to a fixed rod (3) at the top. The fixed rod (3) is rotatably connected to a placement box (4) on the outside. The placement box (4) is equipped with a boosting mechanism (8) inside. The boosting mechanism (8) is used to provide secondary boosting of the contrast agent under pressure feedback. The placement box (4) is fixedly connected to a medicine container (5) at the top. The placement box (4) is fixedly connected to a needle tube (6) at the top. The needle tube (6) is fixedly connected to an infusion tube (7) at the top. The infusion tube (7) is fixedly connected to a contraction mechanism (9) on the outside. The contraction mechanism (9) is used to prevent the contrast agent from flowing out of the fallopian tube. The placement box (4) is fixedly connected to an adjustment mechanism (10) on the outside. The adjustment mechanism (10) is used to automatically adjust the feedback pressure and the temperature of the contrast agent.

2. The fallopian tube contrast agent injection device with pressure feedback and automatic constant temperature function according to claim 1, characterized in that, The booster mechanism (8) includes a support plate (81), which is fixedly connected to the inside of the placement box (4). A motor (82) is fixedly connected to the inside of the placement box (4). A rotating shaft (812) is fixedly connected to the output end of the motor (82). A first main gear (83) is fixedly connected to the outside of the rotating shaft (812). A first driven wheel (84) is fixedly connected to the outside of the rotating shaft (812). A rotating shaft (85) is rotatably connected inside the support plate (81). A guide plate (813) is fixedly connected to the outside of the rotating shaft (85). A sleeve (814) is slidably connected to the outside of the guide plate (813), a second driven wheel (86) is fixedly connected to the outside of the sleeve (814), a second main gear (87) is fixedly connected to the outside of the sleeve (814), a cylinder (89) is fixedly connected to the inside of the placement box (4), a connecting plate (88) is fixedly connected to the output end of the cylinder (89), the first main gear (83) meshes with the second driven wheel (86), a lead screw (810) is fixedly connected to the top of the rotating shaft (85), and a piston (811) is threadedly connected to the outside of the lead screw (810).

3. The fallopian tube contrast agent injection device with pressure feedback and automatic constant temperature function according to claim 1, characterized in that, The contraction mechanism (9) includes a conical sleeve (91), which is fixedly connected to the outside of the infusion tube (7). Multiple fixed plates (93) are fixedly connected to the inside of the conical sleeve (91). A movable ring (92) is slidably connected to the outside of the infusion tube (7). A connecting rod (94) is rotatably connected inside the multiple fixed plates (93). A pull rod (95) is fixedly connected to the top of the movable ring (92). A slider (96) is slidably connected to the outside of the infusion tube (7).

4. The fallopian tube contrast agent injection device with pressure feedback and automatic constant temperature function according to claim 1, characterized in that, The adjustment mechanism (10) includes a display screen (101), which is fixedly connected to the outside of the placement box (4). A detector (102) is fixedly connected to the outside of the infusion tube (7). A heating sleeve (103) is fixedly connected to the outside of both the medicine container (5) and the needle tube (6). A temperature sensor (104) is fixedly connected to the outside of the heating sleeve (103). A circuit (105) is fixedly connected to the bottom of the temperature sensor (104).

5. The fallopian tube contrast agent injection device with pressure feedback and automatic constant temperature function according to claim 2, characterized in that, The other end of the connecting plate (88) is sleeved on the outside of the sleeve (814), and the piston (811) is slidably connected inside the needle tube (6).

6. The fallopian tube contrast agent injection device with pressure feedback and automatic constant temperature function according to claim 3, characterized in that, The other end of the pull rod (95) is fixedly connected to the bottom of the slider (96), and the end of the connecting rod (94) away from the conical sleeve (91) is rotatably connected to the outside of the movable ring (92).

7. The fallopian tube contrast agent injection device with pressure feedback and automatic constant temperature function according to claim 1, characterized in that, The bracket (1) has multiple casters (2) fixedly connected to its bottom. The multiple casters (2) are arranged in a rectangular array and are equipped with brake locking components.

8. The fallopian tube contrast agent injection device with pressure feedback and automatic constant temperature function according to claim 2, characterized in that, The rotating shaft (812) is rotatably connected inside the support plate (81), and the connecting plate (88) is slidably connected inside the support plate (81).

9. The fallopian tube contrast agent injection device with pressure feedback and automatic constant temperature function according to claim 1, characterized in that, The regulating mechanism (10) has a built-in pressure control module. The pressure control module is configured to receive the pressure resistance signal in the fallopian tube in real time and adjust the pushing rate of the booster mechanism (8) synchronously according to the resistance signal to maintain the dynamic balance of the contrast agent injection pressure.

10. The fallopian tube contrast agent injection device with pressure feedback and automatic constant temperature function according to claim 4, characterized in that, The temperature sensor (104) is electrically connected to the heating jacket (103) through the line (105) to form a temperature monitoring feedback closed loop. The detector (102) is electrically connected to the display screen (101) to display the monitored pipe pressure data on the display screen (101) in real time.

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