A hepatic portal blocking device with automatic pressure adjustment and timing alarm

Abstract

The application discloses a kind of automatic pressure and timing alarm adjusting hepatic portal blocking device, belong to hepatic portal blocking technical field, including tightening blocking end component and with it connection integral structure main body pipe component.Tightening blocking end component is used to surround the target position of hepatic portal blood vessel, according to preset pressure realizes automatic tightening or release.It is equipped with automatic gear retraction structure and end pressure sensor inside, can drive tightening operation and real-time monitoring pressure.Main body pipe component is used to support fixed tightening blocking end component, and is equipped with at least one pressure sensor connected with end pressure sensor, forms double detection protection mechanism, ensure accurate pressure control and safety.In addition, the device is also equipped with timing alarm function, can automatically prompt and alarm within predetermined time, avoid injury caused by excessive blocking.The device structure is compact, easy to operate, can effectively improve the accuracy and safety in the process of hepatic portal blocking, has wide clinical application prospect.

Description

Technical Field

[0001] This invention relates to the field of hepatic portal vein occlusion technology, specifically to a hepatic portal vein occlusion device with automatic pressure adjustment and timing alarm. Background Technology

[0002] Currently, in hepatobiliary surgery, it is often necessary to temporarily block the hepatic portal vein using a portal occlusion device, especially in laparoscopic surgery. If the occlusion switch can be operated externally, partial hepatectomy in the abdominal cavity can be performed very conveniently and safely. However, the portal occlusion time is usually no more than 15 minutes. During the operation, doctors or nurses often forget to time it, which brings uncertain risks to the operation.

[0003] Portal occlusion includes hepatic blood flow occlusion, total hepatic blood flow occlusion, and hepatic vein occlusion. Studies have shown that intermittent portal vein occlusion while preserving hepatic artery blood flow does not significantly increase intraoperative blood loss at the liver resection site, but it can significantly reduce hepatic ischemia-reperfusion injury. Currently, during liver surgery, the hepatoduodenal ligament is usually manually ligated with a rubber tubing. During the procedure, it is typically necessary to loosen the occlusion for 5 minutes every 15 minutes to allow blood supply to the liver for 5 minutes, then re-ligate the tubing for the next 5 minutes. This process requires frequent ligation and loosening of the rubber tubing, which is inconvenient, time-consuming, and detrimental to shortening the surgical time. Furthermore, the control of the occlusion strength is often imprecise. Controlling and reducing liver surgery time is particularly important for reducing patient bleeding, but current portal occlusion procedures are complex and waste time in repeated operations.

[0004] Currently, some adjustable hepatic hilum occlusion bands have emerged in the prior art. CN113768576B discloses an adjustable elastic hepatic hilum occlusion band. This occlusion band uses an elastic tubing with a through hole and multiple positioning retaining rings. Positioning grooves are formed between the positioning retaining rings. By sliding the sleeve end, the tightness of the hepatic hilum occlusion band can be adjusted, thus improving its flexibility to some extent. However, such prior art still has the following significant defects and shortcomings: 1. Currently, in liver surgery, existing portal vein occlusion devices typically require surgeons to manually adjust the tightness of the elastic tubing to occlude the portal vein. Especially in laparoscopic surgery, surgeons need to repeatedly manipulate the elastic tubing for ligation and release. This frequent manual manipulation is not only time-consuming but also increases the complexity of the surgery, hindering efficiency. This manual operation is highly dependent on the surgeon's skill and experience, potentially prolonging the operation and consequently impacting patient recovery.

[0005] 2. Most existing portal vein occlusion bands rely on the surgeon's subjective judgment to adjust the tightening intensity, lacking a precise pressure control mechanism. This method cannot ensure consistent pressure with each tightening, easily leading to excessively high or low occlusion pressure, which in turn affects surgical outcomes and patient safety. In particular, in some cases, excessively high or low portal vein pressure may cause interruption or incomplete blood flow, and may even lead to liver damage or thrombosis.

[0006] 3. During surgery, hepatic portal vein occlusion typically requires release at regular intervals (e.g., every 15 minutes) (every 5 minutes) to prevent prolonged hepatic ischemia. However, most current techniques rely on manual timing, and doctors and nurses may forget to release the occlusion in time for various reasons, or they may not accurately determine the timing of release during a busy surgical procedure, leading to overtime. Such human negligence can pose serious health risks to patients, especially after prolonged interruption of hepatic blood flow, as restoring blood flow may cause irreversible liver damage.

[0007] 4. Currently, most porta hepatis occlusion devices lack automatic pressure regulation and safety protection mechanisms. Existing technologies cannot provide timely feedback or automatic correction for excessive tightening or loosening of the porta hepatis occlusion during surgery. Especially when the pressure is too high, traditional porta hepatis occlusion devices often fail to stop tightening in time, potentially causing additional liver damage. Furthermore, existing technologies typically lack automatic timing and alarm functions; if the surgeon fails to release the occlusion device on time, it may lead to over-time and unnecessary liver damage.

[0008] Therefore, although existing hepatic hilum occlusion devices have addressed the need for temporary occlusion of hepatic hilum vessels to some extent, their application in surgery still faces significant safety risks and efficiency issues due to the aforementioned technical limitations. To overcome these problems, there is an urgent need to develop a new hepatic hilum occlusion device. Summary of the Invention

[0009] The problem this invention aims to solve is that existing hepatic portal occlusion devices are cumbersome to operate, time-consuming, have inaccurate tightness control, are prone to operation forgetfulness, pose a risk of exceeding the time limit, and lack automated and intelligent safety protection mechanisms. The invention provides a hepatic portal occlusion device with automatic and precise tightening and occlusion pressure adjustment, intelligent timing, alarm function, and multiple safety protection mechanisms.

[0010] To address the aforementioned problems, this invention provides a hepatic hilum occlusion device with automatic pressure adjustment and timing alarm, comprising a tightening occlusion end component and a main tube component assembled onto the tightening occlusion end component to form an integral structure. The tightening occlusion end component is configured to automatically tighten or release around a target location of the hepatic hilum vessel according to a preset pressure. The tightening occlusion end component includes an automatic gear retraction and release structure for driving the tightening operation and an end pressure sensor disposed on the automatic gear retraction and release structure for monitoring pressure. The main tube component supports and fixes the tightening occlusion end component, and includes at least one pressure sensor connected to the end pressure sensor of the tightening occlusion end component to form a dual detection and protection mechanism. A controller device is connected to the tightening and blocking end component, the control unit being configured to receive and display pressure data from the tightening and blocking end component and control the tightening and blocking end component to tighten; An external operating switch device, electrically connected to a controller device, includes at least one switch for controlling the tightening and loosening of the tightening blocking end component.

[0011] Preferably, the automatic gear structure includes a tightening end housing with an end cap fitted to its side. A micro motor is housed within the tightening end housing, with one end connected to a motor connecting shaft via a sleeve. A transmission gear is mounted on the motor connecting shaft, and a gear shaft is connected to the inner edge of the micro motor. A driven gear is mounted on the gear shaft, and a gap exists between the transmission gear and the driven gear. The automatic gear structure provides an automated tightening and releasing mechanism by driving the transmission gear and the driven gear precisely through the micro motor. The use of the micro motor, combined with the motor connecting shaft and gear system, makes the operation of the hepatic portal vein occlusion device smoother and more precise, avoiding errors and inconsistencies that may occur during traditional manual operation. The gap between the transmission gear and the driven gear ensures uniform tightening force of the occlusion band, preventing it from being too tight or too loose, thereby effectively controlling the occlusion pressure of the hepatic portal vein. This automated control allows for real-time pressure adjustment without relying on manual adjustments by the doctor, reducing the risks associated with human operation and ensuring high precision and safety during the procedure.

[0012] Preferably, the main tube component includes a main tube body, with a blocking tube connected to the upper side of the main tube body. The end of the blocking tube away from the main tube body passes through a corresponding hole on the tightening end housing and is inserted into the gap between the drive gear and the driven gear before extending forward and exiting through a corresponding hole on the end cap. By combining the blocking tube with the automatic gear structure system, a more precise and tighter structural connection is achieved in the hepatic hilum blocking device. This allows the tightening and loosening of the hepatic hilum blocking band to be completed under controlled conditions, effectively avoiding uneven pressure caused by loosening or structural instability, and improving the stability and working efficiency of the device. At the same time, the precise cooperation between the blocking tube and the gear helps to ensure a more uniform tightening force of the blocking band, thereby reducing potential liver damage or blood flow interruption caused by uneven pressure.

[0013] Preferably, the diameter of the blocking tube is larger than the gap width, allowing the driving gear and driven gear to press the blocking tube tightly. This ensures that the driving gear and driven gear can effectively press the blocking tube, thus ensuring that the pressure when the blocking device tightens is not too low. By controlling the diameter of the blocking tube to be larger than the width of the gear gap, a more stable and uniform pressure transmission can be achieved, avoiding the pressure unevenness that may occur in traditional designs. This structure can effectively prevent incomplete or excessive interruption of liver blood flow, reducing the risk of liver damage, especially the probability of liver ischemia-reperfusion injury during surgery.

[0014] Preferably, one end of the end pressure sensor is connected to a power signal cable, and the other end of the pressure sensor is connected to a pressure sensor signal cable that is in contact with the power signal cable. Both the power signal cable and the pressure sensor signal cable are connected to a converter plug, which is connected to a controller device.

[0015] Preferably, the controller includes a control panel connected to a converter plug. The control panel has a timer display and a pressure sensor display on its upper end, and a power supply and a tri-color indicator light below the timer display. A control cable is connected to the side of the control panel and to an external operating switch. This controller integrates multiple functions such as timing, pressure display, and operation control, improving user-friendliness and ease of operation. By displaying the hepatic portal occlusion time and pressure value in real time, doctors can monitor key parameters during the surgery, ensuring that the hepatic portal occlusion is performed within a safe time and pressure range, avoiding human error. The tri-color indicator light provides intuitive visual cues, offering immediate feedback to doctors under different operating conditions, improving safety and accuracy during surgery. Furthermore, the connection to the external operating switch via the control cable further facilitates operation in complex surgical environments, making the procedure more efficient.

[0016] Preferably, the external operating switch device is a foot-operated structure, including a foot switch body connected to a control line. The foot switch body is equipped with a foot release switch and a foot tightening switch. This foot-operated external operating switch device allows the surgeon to keep their hands free during surgery, while simultaneously controlling the tightening and loosening of the hepatic hilum occlusion device through the operation of the foot switch. Compared to traditional manual operation, the foot switch not only improves the surgeon's operational efficiency but also reduces errors caused by hand inconvenience or fatigue. The surgeon can control the device more flexibly, especially in minimally invasive surgeries such as laparoscopy, simplifying the procedure and improving surgical safety and efficiency.

[0017] Preferably, the external operating switch device is a push-button type, including a push-button switch body connected to a control line. The push-button switch body is equipped with a press-release switch and a press-tighten switch. This push-button type external operating switch provides another convenient operating method, particularly suitable for situations requiring frequent adjustments to the hepatic hilum occlusion device. Compared to a foot switch, the push-button switch design makes operation more precise and easier to control, allowing doctors to easily adjust the tightening and loosening of the hepatic hilum occlusion device according to actual needs. It also improves operational accuracy, reduces doctor fatigue and errors caused by tedious operations, and further enhances the safety and efficiency of the surgery.

[0018] Preferably, the buzzer is located on the control panel or an external operating switch.

[0019] Compared with the prior art, the present invention achieves the following beneficial technical effects: This invention employs an automatic gear-driven retraction and extension structure, combined with a micro-motor drive and an end pressure sensor, which can automatically adjust the tightness of the hepatic portal occlusion device according to a preset pressure, eliminating the need for repeated adjustments by the doctor. This automated adjustment structure not only eliminates reliance on the doctor's subjective judgment but also ensures consistent tightening pressure each time, avoiding problems of excessively high or low pressure caused by improper manual operation. Precise pressure control effectively prevents interruption or incomplete blood flow to the liver, thereby reducing the risk of liver damage during surgery.

[0020] The main tube component of this invention incorporates dual pressure sensors, forming a reliable pressure monitoring and protection mechanism. When the pressure sensor at the end of the blocking component detects abnormal pressure, the controller can promptly adjust the pressure or alert the physician via an alarm for intervention. Dual pressure monitoring effectively prevents excessive or insufficient pressure, ensuring the safety of hepatic portal occlusion and preventing liver damage or other complications caused by pressure control errors.

[0021] The controller device of this invention has timing and alarm functions, which can display the time of hepatic hilum occlusion in real time and automatically remind the doctor to release the occlusion device in time after the preset time is reached. The intelligent timing and alarm system solves the problem of negligence caused by manual timing in the prior art, ensuring that the occlusion is released at the appropriate time each time, ensuring the safety of the patient, and avoiding irreversible damage to the liver due to excessive ischemia time.

[0022] This invention provides an external operating switch device that enables tightening and loosening control of the hepatic hilum occlusion device via a foot pedal or push-button switch, making operation simpler and more efficient. In complex surgeries such as laparoscopy, surgeons can more easily control the operation of the hepatic hilum occlusion device without having to perform tedious manual adjustments. This design significantly improves surgical efficiency, reduces surgeon fatigue and errors, and thus enhances surgical safety and precision.

[0023] This invention employs dual pressure sensor protection and intelligent alarm functions, providing multiple safety protection mechanisms. When abnormal pressure or timing errors are detected, the system can promptly issue an alarm to remind the doctor to make adjustments. Combined with the dual pressure sensor and controller device, this invention enables real-time response to abnormal situations during hepatic hilum occlusion, effectively reducing the risks caused by human error or equipment malfunction during surgery.

[0024] This invention enables precise control of the tightening force and timing of the hepatic portal occlusion device, avoiding excessive ischemia or insufficient blood supply to the liver during surgery and significantly reducing the occurrence of hepatic ischemia-reperfusion injury. Precise control not only aids in postoperative liver recovery but also reduces bleeding and surgical complications, improving overall treatment outcomes and postoperative survival rates. Furthermore, it allows surgeons to more easily and quickly control the tightening and loosening of the occlusion device. Whether in laparoscopic procedures or other complex surgeries, surgeons can control the hepatic portal occlusion more efficiently and precisely, avoiding cumbersome procedures and enhancing the surgeon's experience. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the first embodiment of the hepatic portal obstruction device of the present invention, which has automatic pressure adjustment and timing alarm.

[0026] Figure 2 A schematic diagram of the assembly of the tightening blocking end component and the main tube component.

[0027] Figure 3 This is a schematic diagram of the internal structure when assembling the tightening blocking end component with the main tube component.

[0028] Figure 4 This is a schematic diagram of the automatic gear retraction and detraction structure and the blocking tube during assembly.

[0029] Figure 5 This is a schematic diagram of the first embodiment of the controller device.

[0030] Figure 6 This is a schematic diagram of the structure of the first embodiment of the externally operated switch device.

[0031] Figure 7 This is a schematic diagram of the second embodiment of the hepatic portal obstruction device of the present invention, which has automatic pressure adjustment and timing alarm.

[0032] Figure 8 This is a schematic diagram of the second embodiment of the controller device.

[0033] Figure 9 This is a schematic diagram of the structure of a second embodiment of an externally operated switch device.

[0034] In the diagram: 1-Tightening and blocking end component, 101-Miniature motor, 102-End pressure sensor, 103-Tightening end housing, 104-End cap, 105-Transmission gear, 106-Driven gear, 107-Motor connecting shaft, 108-Gear shaft, 109-Gap, 2-Main tube component, 201-Main tube, 202-Pressure sensor, 203-Blocking tube, 3-Controller device, 301-Timer display, 302-Pressure sensor display, 303-Control panel, 304- Power supply assembly, 305-tricolor light, 306-control line, 4-external operating switch device, 401-foot release switch, 402-foot tightening switch, 403-foot switch body, 404-press switch body, 405-press release switch, 406-press tightening switch, 5-integrated power signal cable, 6-pressure sensor signal cable, 7-adapter plug, 8-buzzer. Detailed Implementation

[0035] The present invention will be further explained and described below with reference to the accompanying drawings and embodiments.

[0036] Example 1: Refer to Figures 1-6 As shown, a hepatic hilum occlusion device with automatic pressure adjustment and timing alarm includes a tightening occlusion end component 1 and a main tube component 2 assembled onto the tightening occlusion end component 1 to form an integral structure. The tightening occlusion end component 1 is configured to automatically tighten or release around a target position of the hepatic hilum vessels according to a preset pressure. The tightening occlusion end component 1 includes an automatic gear retraction and release structure for driving the tightening operation and an end pressure sensor 102 disposed on the automatic gear retraction and release structure for monitoring pressure. The main tube component 2 is used to support and fix the tightening occlusion end component 1. The main tube component 2 includes at least one pressure sensor 202 connected to the end pressure sensor 102 of the tightening occlusion end component 1 to form a dual detection and protection mechanism. A controller device 3 is connected to the tightening and blocking end component 1. The control unit is configured to receive and display pressure data from the tightening and blocking component and control the tightening and blocking end component 1 to tighten. An external operating switch device 4 is electrically connected to the controller device 3 and includes at least one switch for controlling the tightening and loosening of the tightening and blocking end component 1.

[0037] Reference Figures 2-4 As shown, the automatic gear structure includes a tightening end housing 103, with an end cap 104 sleeved on the side of the tightening end housing 103. A micro motor 101 is disposed inside the tightening end housing 103. One end of the micro motor 101 is connected to a motor connecting shaft 107 via a sleeve. A transmission gear 105 is disposed on the motor connecting shaft 107. A gear shaft 108 is connected to the inner edge of the micro motor 101. A driven gear 106 is disposed on the gear shaft 108. A gap 109 is provided between the transmission gear 105 and the driven gear 106. The automatic gear structure provides an automated tightening and releasing mechanism by driving the transmission gear 105 and the driven gear 106 precisely through the micro motor 101. The use of the micro motor, combined with the motor connecting shaft and the gear system, makes the operation of the hepatic portal obstruction device more stable and precise, avoiding the errors and inconsistencies that may occur during traditional manual operation. The clearance of 109 between the drive gear and the driven gear ensures uniform tightening of the occlusion band, preventing it from being too tight or too loose, thereby effectively controlling the occlusion pressure of the hepatic portal vein. This automated control allows for real-time pressure adjustment without relying on manual adjustments by the doctor, reducing the risks associated with human intervention and ensuring high precision and safety during the procedure.

[0038] The main tube component 2 includes a main tube body 201, with a blocking tube 203 connected to the upper side of the main tube body 201. The end of the blocking tube 203 away from the main tube body 201 passes through a corresponding hole on the tightening end housing 103 and intersects in the gap 109 between the drive gear 105 and the driven gear 106 before extending forward and exiting through a corresponding hole on the end cap 104. By combining the blocking tube 203 with the automatic gear structure system, a more precise and tighter structural connection is achieved in the hepatic hilum blocking device. This allows the tightening and loosening of the hepatic hilum blocking band to be completed under controlled conditions, effectively avoiding uneven pressure caused by loosening or structural instability, and improving the stability and working efficiency of the device. Simultaneously, the precise fit between the blocking tube and the gear helps ensure a more uniform tightening force of the blocking band, thereby reducing potential liver damage or blood flow interruption caused by uneven pressure.

[0039] The diameter of the blocking tube 203 is larger than the width of the gap 109, allowing the drive gear 105 and driven gear 106 to press the blocking tube 203 tightly. This ensures that the drive gear and driven gear can effectively press the blocking tube, thus ensuring that the pressure when the blocking device tightens is not too low. By controlling the diameter of the blocking tube to be larger than the width of the gear gap, a more stable and uniform pressure transmission can be achieved, avoiding the uneven pressure phenomenon that may occur in traditional designs. This structure can effectively prevent incomplete or excessive interruption of liver blood flow, reducing the risk of liver damage, especially the probability of liver ischemia-reperfusion injury during surgery.

[0040] One end of the end pressure sensor 102 is connected to a power signal cable 5, and the other end of the pressure sensor 202 is connected to a pressure sensor signal cable 6 that is in contact with the power signal cable 5. Both the power signal cable 5 and the pressure sensor signal cable 6 are connected to a converter plug 7, which is connected to the controller device 3.

[0041] Reference Figure 5 As shown, the controller device 3 includes a control panel 303, which is connected to a converter plug 7. A timer display screen 301 and a pressure sensor display screen 302 are respectively installed on the upper part of the control panel 303. Below the timer display screen 301 are a power supply component 304 and a tri-color light 305. The power supply component 304 is a rechargeable battery module with a battery level indicator; it only needs to be charged periodically. A control line 306 is connected to the side of the control panel 303, and the control line 306 is connected to an external operation switch device 4. The controller device 3 integrates multiple functions such as timing, pressure display, and operation control, improving the user-friendliness and ease of operation. By displaying the hepatic portal occlusion time and pressure value in real time, doctors can monitor key parameters during the operation, ensuring that the hepatic portal occlusion is performed within a safe time and pressure range, avoiding human error. The tri-color light design provides intuitive visual cues, giving doctors immediate feedback on different operating states, such as normal pressure, excessively high pressure, and excessively low pressure, improving the safety and accuracy of the operation. Furthermore, the connection between the control line and the external operating switch further facilitates the doctor's operation in complex surgical environments, making the operation more efficient.

[0042] Reference Figure 6As shown, the external operating switch device 4 is a foot-operated structure, including a foot switch body 403. The foot switch body 403 is connected to the control line 306. The foot switch body 403 is equipped with a foot release switch 401 and a foot tightening switch 402. The foot-operated external operating switch device allows the doctor to keep both hands free during surgery, while controlling the tightening and loosening of the hepatic hilum occlusion device through the operation of the foot switch. Compared with traditional manual operation, the foot switch not only improves the doctor's operating efficiency but also reduces errors caused by inconvenience or fatigue in hand operation. Doctors can control the device more flexibly, especially in minimally invasive surgeries such as laparoscopy, which can simplify the operation process and improve the safety and efficiency of the surgery.

[0043] Example 2: Refer to Figures 7-9 As shown, the external operating switch device 4 is a push-button type, including a push-button switch body 404. The push-button switch body 404 is connected to the control line 306. The push-button switch body 404 is equipped with a push-release switch 405 and a push-tighten switch 406. This push-button type external operating switch provides another convenient operating method, especially suitable for situations requiring frequent adjustments to the hepatic portal occlusion device. Compared to a foot switch, the push-button switch design makes operation more precise and easier to control, allowing doctors to easily adjust the tightening and loosening of the hepatic portal occlusion device according to actual needs. It also improves operational accuracy, reduces doctor fatigue and errors caused by tedious operations, and further improves the safety and efficiency of the surgery. The remaining technical solutions are the same as in Embodiment 1.

[0044] Reference Figure 1 , 5 As shown in Figures 7 and 9, the buzzer 8 is mounted on the control panel 303 or the external operating switch device 4.

[0045] To facilitate understanding of the above technical solutions of the present invention, the following detailed description of the above technical solutions of the present invention will be provided through specific usage methods.

[0046] The specific working process is as follows: The doctor finds the position to be blocked by the blocking tube 203 at the upper end of the main tube 201 of the main tube component 2, bypasses the porta hepatis area, and ensures that the porta hepatis vessels are surrounded around it. The blocking tube 203 is passed through the corresponding hole on the tightening end housing 103 of the tightening blocking end component 1, passes through the gap 109 between the transmission gear 105 and the driven gear 106, and then extends forward and exits through the corresponding hole on the end cap 104. It is ensured that the end pressure sensor 102 and the pressure sensor 202 of the main tube component 2 are correctly connected to the controller device 3. The controller device 3 is turned on. Then, according to the surgical requirements, the doctor performs the blocking operation through the external operation switch device 7 (foot pedal or press type). After activation, the controller device 3 controls the micro motor 101 driving the automatic gear retraction structure to drive the transmission gear 105 to rotate forward via the motor connecting shaft 107. The transmission gear 105 drives the blocking tube 203 to tighten upward, gradually surrounding the hepatic portal vein until the pressure set by the controller device 3 is reached. At the same time, the pressure sensor display screen 302 of the controller device 3 will display and monitor the blocking pressure data of the hepatic portal vein transmitted by the end pressure sensor 102 and the pressure sensor 202 in real time. The doctor can observe the pressure during tightening in real time according to the pressure sensor display screen 302. When it enters the reasonable pressure range, the three-color light 305 flashes green to indicate that the pressure has reached the target value. Simultaneously, buzzer 8 sounds once, and the timer starts. The countdown display can be observed on the timer display 301. When the countdown reaches 10 minutes, the yellow light of the three-color lamp 305 flashes, and a buzzer sounds once to remind the doctor. When the countdown reaches 15 minutes, the red light flashes, and a long beep sound is emitted by the buzzer 307. At this time, the foot pedal or press switch is released until the pressure drops below the minimum value of the reasonable pressure range, at which point the alarm stops. The controller device 3 controls the micro motor 101 of the automatic gear retraction structure to drive the transmission gear 105 to rotate unidirectionally through the motor connecting shaft 107. The transmission gear 105 drives the blocking tube 203 downward, causing the blocking band 203 to loosen and restore blood flow to the hepatic portal vein.

[0047] After the operation, the adapter plug 7 can be unplugged from the controller device 3. The controller device 3 and the external operation switch device 4 are reusable, while the tightening blocking end component 1 and the main tube component 2 are for single use.

[0048] The use of the hepatic hilum occlusion device of this invention, through automatic pressure adjustment, timing alarm, and dual safety protection mechanisms, greatly reduces the possibility of errors during surgery, improving efficiency and safety. Doctors only need to simply set the preset pressure and time to rely on the device's intelligent control to temporarily occlude the hepatic hilum vessels, reducing the tediousness and potential risks of manual operation.

[0049] This invention, through technologies such as automatic pressure adjustment, intelligent timing and alarm, dual pressure sensing protection, and external operating switches, not only overcomes the shortcomings of existing hepatic portal vein occlusion devices in terms of operational complexity, inaccurate pressure control, and difficulty in ensuring timing, but also significantly improves the safety, efficiency, and precision of liver surgery. Especially in high-precision surgeries such as laparoscopic surgery, the application of this invention can significantly reduce surgical risks, shorten operation time, and improve postoperative recovery for patients.

[0050] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0051] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0052] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention described herein.

Claims

1. A hepatic portal vein blocking device with automatic pressure adjustment and timing alarm, comprising a tightening blocking end component (1) and a main tube component (2) assembled onto the tightening blocking end component (1) to form an integral structure, characterized in that, The tightening and blocking end component (1) is configured to automatically tighten or release around the target location of the hepatic hilum vessels according to a preset pressure. The tightening and blocking end component (1) includes an automatic gear retraction and release structure for driving the tightening operation and an end pressure sensor (102) disposed on the automatic gear retraction and release structure for monitoring pressure. The main tube component (2) is used to support and fix the tightening blocking end component (1). The main tube component (2) includes at least one pressure sensor (202) connected to the end pressure sensor (102) of the tightening blocking end component (1), thereby forming a dual detection and protection mechanism. A controller device (3) is connected to a tightening and blocking end component (1), the controller device being configured to receive and display pressure data from the tightening and blocking end component (1) and control the tightening and blocking end component (1) to tighten; An external operating switch device (4) is electrically connected to a controller device (3) and includes at least one switch for controlling the tightening and loosening of the tightening blocking end component (1); The automatic gear retraction structure includes a tightening end housing (103), an end cap (104) sleeved on the side of the tightening end housing (103), a micro motor (101) is provided inside the tightening end housing (103), one end of the micro motor (101) is connected to a motor connecting shaft (107) through a sleeve, a transmission gear (105) is provided on the motor connecting shaft (107), a gear shaft (108) is connected to the inner edge of the micro motor (101), a driven gear (106) is provided on the gear shaft (108), and a gap (109) is provided between the transmission gear (105) and the driven gear (106). The main tube component (2) includes a main tube body (201), and a blocking tube (203) is connected to the upper side of the main tube body (201). The end of the blocking tube (203) away from the main tube body (201) passes through the corresponding hole on the tightening end outer shell (103) and passes through the gap (109) between the transmission gear (105) and the driven gear (106) and then extends forward and passes out through the corresponding hole on the end cover (104). The diameter of the blocking tube (203) is greater than the width of the gap (109), so that the transmission gear (105) and the driven gear (106) press the blocking tube (203) together. One end of the end pressure sensor (102) is connected to a power signal cable (5), and the other end of the pressure sensor (202) is connected to a pressure sensor signal cable (6) that is in contact with the power signal cable (5). The power signal cable (5) and the pressure sensor signal cable (6) are both connected to a converter plug (7), and the converter plug (7) is connected to the controller device (3). The controller device (3) includes a control panel (303), which is connected to a converter plug (7). The upper end of the control panel (303) is provided with a timer display screen (301) and a pressure sensor display screen (302). The lower end of the timer display screen (301) is provided with a power supply component (304) and a tri-color light (305). The side end of the control panel (303) is connected to a control line (306), which is connected to an external operating switch device (4). The buzzer (8) is located on the control panel (303) or the external operating switch (4).

2. The hepatic portal obstruction device with automatic pressure adjustment and timing alarm as described in claim 1, characterized in that, The external operating switch device (4) is a foot pedal structure, including a foot switch body (403), which is connected to the control line (306). The foot switch body (403) is provided with a foot release switch (401) and a foot tightening switch (402).

3. The hepatic portal obstruction device with automatic pressure adjustment and timing alarm as described in claim 1, characterized in that, The external operating switch device (4) is a push-button type structure, including a push-button switch body (404), which is connected to the control line (306). The push-button switch body (404) is provided with a push-release switch (405) and a push-tighten switch (406).

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