Hydraulically driven blood flow control device

Abstract

The application discloses a hydraulic driving blood flow controlled release device and belongs to the technical field of laparoscopic blood flow blocking medical instruments. The device comprises a controlled release belt, a controlled release execution component and a pressure control component. The controlled release belt comprises a connecting part and a belt body. The controlled release execution component comprises a hydraulic cylinder with a first inner cavity, a first piston matched with the first inner cavity and a controlled release push rod connected with the first piston. The pressure control component comprises a pump body with a second inner cavity, a second piston matched with the second inner cavity of the pump body and a position maintaining mechanism capable of adjusting the position of the second piston and fixing the second piston with the pump body. The device adopts a small controlled release belt to block blood vessels, can complete the wrapping of small blood vessels or tissues and thus block the blood vessels or tissues. The controlled release belt is tightened or loosened by the controlled release execution component driven by hydraulic pressure, and the blocking force is observed by a pressure gauge, so that the blocking force can be more accurately controlled.

Description

Technical Field

[0001] This invention relates to a hydraulically driven blood flow control device, belonging to the field of laparoscopic blood flow occlusion medical device technology. Background Technology

[0002] In surgical procedures, especially liver resection or liver transplantation, effective control of intraoperative bleeding is crucial for ensuring surgical safety. Currently, commonly used hepatic blood flow occlusion techniques include porta hepatis occlusion, subhepatic occlusion, and selective vascular occlusion, with related instruments including vascular clamps, clamping forceps, and occlusion bands. Traditional porta hepatis occlusion often involves ligating the porta hepatis vessels with a rubber tube or catheter, combined with clamping to achieve blood flow occlusion. However, this method is cumbersome, time-consuming, and difficult to precisely control the ligation force, and is prone to increased surgical risks due to slippage of the occlusion band. For example, existing porta hepatis occlusion devices require external knotting for fixation, which not only relies on the surgeon's experience but also carries the risk of vascular damage due to overly tight ligation or occlusion failure due to overly loose ligation.

[0003] Currently, two main types of vascular occlusion straps are used: mechanical traction type and pneumatic compression type. Mechanical traction vascular occlusion straps achieve vascular occlusion through mechanical tightening. For example, a blood flow control device provided in CN201910536189.9 has a simple structure and principle, but it is difficult to precisely control the pressure, which may lead to incomplete occlusion or excessive compression, causing tissue damage or nerve injury. Furthermore, its mechanical traction structure, which transmits contractile force, has a certain degree of rigidity, which can interfere with other surgical instruments in laparoscopy. Pneumatic compression vascular occlusion straps allow for precise control of the occlusion force. For example, a laparoscopic hepatic hilum occlusion device provided in CN202310740548.9, however, its compression balloon is too large to be suitable for vascular occlusion in laparoscopic surgery while ensuring the occlusion range is maintained.

[0004] To address the above issues, a blood flow control device was designed that is convenient to release, allows for quantifiable blood flow occlusion, and is suitable for laparoscopic surgery. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a hydraulically driven blood flow control device, which adopts a combination of hydraulic and mechanical driving methods to accurately control the blood flow blocking force.

[0006] The technical problem to be solved by this invention is achieved by the following technical solution:

[0007] A hydraulically driven blood flow controlled release device, comprising:

[0008] A controlled-release tape, comprising a connecting portion and a tape body, wherein both ends of the tape body are fixed to the connecting portion and form a ring;

[0009] The controlled-release actuator includes a hydraulic cylinder with a first inner cavity, a first piston that cooperates with the first inner cavity, and a controlled-release push rod connected to the first piston. The end of the hydraulic cylinder closer to the patient is the proximal end, and the end closer to the operator is the distal end. The controlled-release push rod extends from the proximal opening of the hydraulic cylinder. A controlled-release part is provided at the proximal end of the controlled-release push rod, and a controlled-release hole is provided on the controlled-release part. The connecting part is connected to the hydraulic cylinder, and the middle part of the belt extends out from the controlled-release hole to form an annulus. The size of the annulus formed by the belt at the proximal end of the controlled-release part is changed by the extension and retraction of the controlled-release push rod.

[0010] The pressure control component includes a pump body having a second inner cavity, a second piston cooperating with the second inner cavity of the pump body, the second piston being fixed to the pump body by a position holding mechanism that can adjust its own position, the proximal end of the second inner cavity being connected to the distal end of the first inner cavity through a pipeline, the first inner cavity, the second inner cavity, and the pipeline being filled with liquid, and a pressure gauge for measuring the liquid pressure in the pipeline being installed at the proximal end of the pump body or the distal end of the pipeline.

[0011] Preferably, the belt body is composed of a first belt body and a second belt body connected together by a quick-locking member.

[0012] Preferably, the quick-locking component includes a clamp for fixing to the end of the first belt body, and a clamp fixed to the clamp for clamping the second belt body.

[0013] Preferably, the outer wall of the hydraulic cylinder is provided with a protrusion, and the connecting part of the control release belt is an annular sleeve. The annular sleeve is fitted from the far end to the near end of the hydraulic cylinder and blocked by the protrusion, thereby realizing the quick connection between the connecting part and the hydraulic cylinder.

[0014] Preferably, the position holding mechanism comprises a pressure-controlling push rod connected to the second piston and an internally threaded sleeve fixed on the pump body. The pressure-controlling push rod has an external thread on its body and a rotating part at its distal end. The internally threaded sleeve on the pump body engages with the external thread of the pressure-controlling push rod. By rotating the pressure-controlling push rod through the rotating part, the second piston can be held at any position within the second inner cavity of the pump body.

[0015] Preferably, the pressure gauge is used to indicate the magnitude of the blocking force applied by the controlled-release actuator to the controlled-release band, thereby quantifying the blood flow in the blocked blood vessel or tissue by changing the magnitude of the blocking force of the controlled-release band.

[0016] Preferably, the pressure control component is connected to multiple controlled-release actuators via multiple pipelines, and each controlled-release actuator is equipped with a controlled-release belt at its proximal end.

[0017] Preferably, each pipeline connected to the pressure control component is equipped with a control valve for controlling the on / off state, and each control valve individually controls the control release actuator of its respective pipeline.

[0018] Preferably, the rotating part is rotated manually or by a motor.

[0019] Preferably, the pipeline is a flexible pipeline.

[0020] Preferably, the width of the controlled-release tape is 1-8 mm.

[0021] Preferably, the first inner cavity, the second inner cavity, and the pipeline are filled with liquid, including water, saline solution, and a special hydraulic fluid. Gas can also be used instead of liquid.

[0022] The beneficial effects of this invention are:

[0023] (1) Compared with the airbag compression band, the device provided by the present invention uses a smaller controlled release band to block blood vessels, which can wrap around small blood vessels or tissues, thereby blocking blood vessels or tissues.

[0024] (2) Compared with the existing purely mechanical tightening method for blocking, which is difficult to control the pressure precisely, this controlled-release band tightens or loosens the controlled-release band by a hydraulically driven controlled-release actuator and observes the blocking force by a pressure gauge. It can more accurately control the magnitude of the blocking force, thereby avoiding the negative effects of being too tight or too loose. In addition, during the maintenance phase, it can detect pressure changes and make immediate adjustments so that the blocking force is always kept within a suitable range. Through precise control of the blocking force, blood flow can be controlled and released in a specific range, such as maintaining blood flow at 30%, 40%, 50%, etc., which can ensure less bleeding during the operation and avoid thermal ischemic damage to the target organ.

[0025] (3) The pressure control component can precisely squeeze or extract liquid into the controlled release execution component, quickly realize the control and release of the controlled release band on blood vessels or tissues, and can finely adjust the magnitude of the blocking force through the position holding mechanism and maintain the stability of the blocking force;

[0026] (4) This device has a simple structure and is easy to control. The main body can be made of disposable medical plastic as needed, which is low in cost and easy to promote and use. In addition, the hydraulic pipeline used for transmission can be made of thin and flexible pipeline to reduce interference from other instruments in laparoscopic surgery. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a cross-sectional schematic diagram of the controlled-release belt and the controlled-release actuator.

[0029] Figure 3 A three-dimensional structural diagram of the controlled-release belt and the controlled-release actuator;

[0030] Figure 4 This is a cross-sectional structural diagram of the pressure control component;

[0031] Figure 5 This is a structural diagram of a quick-locking component.

[0032] In the picture:

[0033] 1. Controlled-release tape; 101. Connecting part; 102. Tape body; 103. First tape body; 104. Second tape body;

[0034] 2. Controlled release actuator; 201. First inner cavity; 202. Hydraulic cylinder; 203. First piston; 204. Controlled release push rod; 205. Controlled release part; 206. Controlled release hole; 207. Protrusion; 208. Annular sleeve; 209. First connector;

[0035] 3. Pressure control components; 301. Second inner cavity; 302. Pump body; 303. Second piston; 304. Pressure gauge; 305. Second connector;

[0036] 4. Quick-locking component; 401. Clamp base; 402. Clamp body; 403. Buckle;

[0037] 5. Piping;

[0038] 6. Position holding mechanism; 601. Pressure control push rod; 602. Internal threaded sleeve; 603. Rotating part. Detailed Implementation

[0039] To facilitate a clear understanding of the technical means, creative features, objectives, and effects of this invention, the invention will be further described below in conjunction with specific illustrations.

[0040] like Figure 1 As shown, this hydraulically driven blood flow control release device includes: a control release belt 1, a control release execution component 2, and a pressure control component 3.

[0041] The controlled-release band 1 is used to be placed on the blood vessels or tissues that need to block blood flow; then the pressure control component 3 is used to squeeze or extract liquid into the controlled-release execution component 2 to achieve hydraulic transmission; the extension and retraction of the controlled-release execution component 2 is used to drive the ring formed by the controlled-release band 1 to tighten or loosen, thereby achieving control or release of blood vessels or tissues.

[0042] like Figure 2 , Figure 3As shown, the controlled-release band 1 includes a connecting portion 101 and a band body 102. Both ends of the band body 102 are fixed to the connecting portion 101 and form a ring. The band body 102 is made of elastic or non-elastic material, preferably elastic rubber, and its width is 1-8 mm. Non-elastic material allows for more direct transmission of the blocking force, making it easier to precisely control the blocking force. Elastic material has the advantage of a softer contact surface. To facilitate application around uninterrupted blood vessels or tissues, the band body 102 has a two-section structure, including a first band body 103 and a second band body 104. One end of each band body 103 and band body 104 is fixed to the connecting portion 101. During surgery, the free ends of the first band body 103 and second band body 104, which pass over continuous blood vessels or tissues, are connected together using a quick-locking device 4 to form a ring-shaped band body 102 that is applied to the blood vessel or tissue, allowing for subsequent tightening of the ring-shaped band body 102.

[0043] like Figure 2 , Figure 3 As shown, the controlled-release actuator 2 includes a hydraulic cylinder 202 with a first inner cavity 201. The hydraulic cylinder 202 is made of a smooth and slender medical plastic cylinder. It also includes a first piston 203 and a controlled-release push rod 204. The first piston 203 cooperates with the first inner cavity 201. By squeezing or withdrawing liquid into the first inner cavity 201 of the hydraulic cylinder 202, the first piston 203 moves, and the controlled-release push rod 204 connected to the first piston 203 moves accordingly. The end of the hydraulic cylinder 202 closer to the patient is the proximal end, and the end closer to the operator is the distal end. The distal end of the hydraulic cylinder 202 is provided with a first connector 209 connected to the tubing 5, and the proximal end of the hydraulic cylinder 202 is provided with an opening to accommodate the extension and retraction of the controlled-release push rod 204. A controlled-release push rod 204 extends from the proximal opening of the hydraulic cylinder 202. A controlled-release portion 205 is located at the proximal end of the push rod 204. The push rod 204 and the controlled-release portion 205 are integrally formed from medical-grade plastic. A controlled-release hole 206 is provided on the controlled-release portion 205 for the tape body 102 to pass through. The connecting portion 101 is connected to the hydraulic cylinder 202 (it can be a fixed connection or a convenient disassembly limiting connection, which prevents the connecting portion 101 from detaching from the proximal end of the hydraulic cylinder 202 and allows for quick disassembly and replacement). The middle portion of the tape body 102 passes through the controlled-release hole 206 to form an annulus. The size of the annulus formed by the tape body 102 at the proximal end of the controlled-release portion 205 is changed by the extension and retraction of the push rod 204. The proximal end of the connecting portion 101 has a concave arc shape, and the surface of the connecting portion 101 is covered with a medical-grade rubber layer to better fit the surface of blood vessels or tissues and reduce damage caused by uneven local stress.

[0044] The control-release section 205 may have only one control-release hole 206, in which case the belt 102 passes through and back through this control-release hole 206. Alternatively, the control-release section 205 may have at least two control-release holes 206. One end of the belt 102 is fixed to the connecting part 101, and the other end of the belt 102 passes from the distal end to the proximal end of one control-release hole 206, then from the proximal end to the distal end of another control-release hole 206, and finally is fixed to the connecting part 101. This multi-hole structure and winding method ensure that even if the control-release push rod 204 exceeds its maximum stroke and disengages from the hydraulic cylinder 202, it will remain connected to the belt 102 and will not completely lose connection.

[0045] like Figure 4 As shown, the pressure control component 3 includes a pump body 302 with a second inner cavity 301, a second piston 303, and a position holding mechanism 6. The pump body 302 is cylindrical and is held by the operator. A second connector 305 connected to the pipeline 5 is provided at the proximal end of the pump body 302, and the distal end of the pump body 302 is open. The second piston 303 is installed in the second inner cavity 301 of the pump body 302. The second piston 303 is fixed to the pump body 302 by the position holding mechanism 6, which can adjust its own position. In this way, when the blocking force is appropriate, the operator's hands can be freed and the blocking force can be maintained automatically. The proximal end of the second inner cavity 301 is connected to the distal end of the first inner cavity 201 through the pipeline 5. The first inner cavity 201, the second inner cavity 301, and the pipeline 5 are filled with liquid (the liquid includes water, saline, or special hydraulic fluid; gas can also be used instead of liquid). Preferably, it is filled with water or saline. Water has the advantages of low compressibility and direct pressure transmission, and it is harmless to the human body even if there is an accidental leak. A pressure gauge 304 for measuring the liquid pressure in the pipeline 5 is installed near the pump body 302 or at the far end of the pipeline 5.

[0046] The pressure gauge 304 is used to indicate the magnitude of the blocking force applied by the controlled-release actuator 2 to the controlled-release band 1. By changing the magnitude of the blocking force of the controlled-release band 1, the blood flow of the blocked blood vessel or tissue is quantified.

[0047] Currently, single mechanical traction bandages, due to limitations in their drive structure, typically employ a rigid drive structure. Even minute movements of the bandage can generate significant changes in traction force, making it impossible to precisely maintain the magnitude of the traction force or accurately measure the direct blocking force exerted by the bandage on the blood vessel or tissue. Therefore, mechanical traction bandages may lead to incomplete occlusion or excessive compression, causing tissue damage or nerve injury. Furthermore, the rigidity of the mechanical traction structure transmitting contractile force can cause interference with other surgical instruments during laparoscopic surgery.

[0048] The device employs a hydraulic transmission system for the transmission section from outside the abdominal cavity to inside, while the controlled-release band 1 is still used at the blocking end. The hydraulically driven controlled-release actuator 2 provides a stable and continuous blocking force. Relying on the cooperation of the pressure gauge 304 and the position holding mechanism 6, the blocking force of the controlled-release band 1 body 102 can be precisely controlled through fine-tuning of the position holding mechanism 6 and real-time measurement by the pressure gauge 304. This allows for precise control of the blocking force, enabling the release of blood flow from blood vessels or tissues within a specific range, such as maintaining blood flow at 30%, 40%, or 50%, ensuring minimal intraoperative bleeding without causing thermal ischemia-induced damage to the target organ. Furthermore, the tubing can utilize a thin, flexible tubing 5 (medical-grade plastic tubing) to reduce interference from other instruments during laparoscopic surgery.

[0049] Currently, single-balloon compression bandages require an inflatable inner cavity, resulting in excessively large blocking ends. Furthermore, the pressure sensor for measuring vascular compression must be installed inside the balloon, further increasing its size and complexity. This device, however, employs a combination of hydraulic and mechanical actuation, utilizing a small-sized controlled-release band 1 to block blood vessels. An external pressure gauge 304 measures the pressure in the tubing 5 to reflect the tension of the controlled-release actuator 2 on the controlled-release band 1. This not only accurately measures the blocking force but also allows for the wrapping of small blood vessels or tissues, thereby effectively blocking them.

[0050] like Figure 5 As shown, in some embodiments, the quick-locking member 4 includes a clamp 401 for fixing to the end of the first strap 103, and a clamp 402 fixed to the clamp 401 for clamping the second strap 104. The clamp 402 is composed of an upper clamp 402 and a lower clamp 402 made of medical plastic material. One end of the upper clamp 402 and the lower clamp 402 are hinged to each other, and the other end is connected to each other by a buckle 403. The second strap 104 is passed between the upper clamp 402 and the lower clamp 402, and the upper clamp 402 and the lower clamp 402 are pressed with surgical forceps, so that the two are firmly fixed by the buckle 403, thereby clamping the second strap 104. Before tightening, the size of the ring can be changed by locking the second band 104 to adapt to blood vessels or tissues of different sizes. By using the quick-locking member 4 and the controlled-release actuator 2 together, the controlled-release actuator 2 is always working within the fully tightenable stroke (without the quick-locking member 4, the controlled-release actuator 2 may not be able to block blood vessels or tissues when it is at its maximum stroke).

[0051] like Figure 3As shown, in some embodiments, the outer wall of the hydraulic cylinder 202 is provided with a protrusion 207, and the connecting part 101 of the controlled-release band 1 is an annular sleeve 208. The annular sleeve 208 is fitted from the distal end to the proximal end of the hydraulic cylinder 202 and blocked by the protrusion 207, thereby achieving a quick connection between the connecting part 101 and the hydraulic cylinder 202. During a single operation, the band 102 may break or require replacement. In this case, the connecting part 101 of the controlled-release band 1 is connected to the hydraulic cylinder 202 using the annular sleeve 208, which does not require fixing. It is only necessary to limit the annular sleeve 208 by the protrusion 207 to prevent the connecting part 101 from detaching from the hydraulic cylinder 202. The controlled-release band 1 can be easily replaced without replacing the entire device, saving operating costs.

[0052] like Figure 4 As shown, in some embodiments, the position holding mechanism 6 includes a pressure control push rod 601 connected to the second piston 303 and an internally threaded sleeve 602 fixed on the pump body 302. The pressure control push rod 601 has an external thread on its body and a rotating part 603 at its distal end. The internally threaded sleeve 602 on the pump body 302 cooperates with the external thread of the pressure control push rod 601. By rotating the pressure control push rod 601 through the rotating part 603, the second piston 303 can be held at any position in the second inner cavity 301 of the pump body 302.

[0053] like Figure 4 As shown, in some embodiments, the rotating part 603 is rotated manually or by a motor. Manual rotation saves material costs, allowing the device to be made into a disposable medical device. In the motor-driven method (not shown), the motor shaft is connected to the rotating part 603, the motor body is fixed to the sliding seat, and the hydraulic cylinder 202 has a strip-shaped slide. The sliding seat has an inner hole that mates with the hydraulic cylinder 202, and a protrusion in the inner hole that mates with the strip-shaped slide. When the sliding seat is fitted onto the hydraulic cylinder 202, the protrusion is confined to slide within the strip-shaped slide. The sliding seat, motor, and hydraulic cylinder 202 do not rotate relative to each other, but they do move relative to each other with the second piston 303. The motor-driven method improves automation. By connecting the pressure gauge 304 and the motor to the controller system, it can automatically rotate to the set pressure value and maintain that position automatically, reducing the operator's workload.

[0054] Since the diameter of the laparoscopic surgery opening is generally between 5-15mm, in order for the control-release band 1 and control-release execution component 2 of this device to enter the abdominal cavity along the opening, the maximum width of the control-release band 1 and control-release execution component 2 is smaller than the laparoscopic surgery opening.

[0055] To address the issue of simultaneously blocking blood flow to multiple blood vessels or tissues during a single surgery, an embodiment is designed whereby a pressure control component 3 simultaneously controls multiple controlled-release execution components 2.

[0056] In some embodiments, the pressure control component 3 is connected to multiple release control components 2 via multiple conduits 5, and each release control component 2 has a release control band 1 installed at its proximal end. Multiple release control bands 1 can be controlled by one pressure control component 3 to simultaneously block various blood vessels or tissues.

[0057] In some embodiments, a control valve is installed on each pipeline 5 connected to the pressure control component 3 to control its on / off state. Each control valve individually controls the control release actuator 2 of its respective pipeline 5. The control valves can be used to independently control the on / off state of each branch in the pipeline 5.

[0058] How to use:

[0059] The controlled-release actuator 2 is in its initial state, at which point the controlled-release push rod 204 retracts into the hydraulic cylinder 202, manipulating the first band 103 and the second band 104 to wrap around the target blood vessel or tissue. Then, the free ends of the first band 103 and the second band 104 are connected by the quick-locking member 4 to form a closed wrapping ring. At this point, the accommodating space within the ring is at its maximum, and there is no binding force on the wrapped tissue or blood vessel.

[0060] As the pressure control component 3 gradually increases the pressure inside the release control component 2, the pressure inside the hydraulic cylinder 202 gradually increases, and the release control push rod 204 gradually extends under the action of hydraulic pressure. The release control part 205 gradually shrinks the closed ring formed by the first belt 103 and the second belt 104, thereby generating a blocking and binding force on the surrounding blood vessels or tissues, thereby controlling blood flow.

[0061] By controlling the magnitude of the hydraulic pressure generated by the pressure control component 3, the thrust of the controlled-release push rod 204 can be controlled, thereby controlling the binding force of tissues or blood vessels. The magnitude of the hydraulic pressure is displayed in real time by the pressure gauge 304, so as to provide more precise binding force to control blood flow appropriately. Controlling blood flow includes not only completely blocking blood flow, but also fine-tuning the pressure according to the actual needs of the surgery to achieve partial blockage, which can ensure less bleeding during the operation and avoid thermal ischemia damage to the target organ.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulically driven blood flow controlled release device, characterized in that, include: Controlled-release belt (1), the controlled-release belt (1) includes a connecting part (101) and a belt body (102), the two ends of the belt body (102) are fixed to the connecting part (101) and form a ring; The controlled-release actuator (2) includes a hydraulic cylinder (202) having a first inner cavity (201), a first piston (203) cooperating with the first inner cavity (201), and a controlled-release push rod (204) connected to the first piston (203). The end of the hydraulic cylinder (202) closer to the patient is the proximal end, and the end closer to the operator is the distal end. The controlled-release push rod (204) extends from the proximal end of the hydraulic cylinder (202). The control rod (204) extends out from the end opening and is provided with a control part (205) at the proximal end. The control part (205) is provided with a control hole (206). The connecting part (101) is connected to the hydraulic cylinder (202). The middle part of the belt (102) passes through the control hole (206) to form an annulus. The size of the annulus formed by the belt (102) at the proximal end of the control part (205) is changed by the extension and retraction of the control rod (204). The pressure control component (3) includes a pump body (302) having a second inner cavity (301), a second piston (303) cooperating with the second inner cavity (301) of the pump body (302), the second piston (303) being fixed to the pump body (302) by a position holding mechanism (6) that can adjust its own position, the proximal end of the second inner cavity (301) being connected to the distal end of the first inner cavity (201) through a pipe (5), and the first inner cavity (201), the second inner cavity (301), and the pipe (5) being filled with liquid.

2. The hydraulically driven blood flow controlled release device according to claim 1, characterized in that, The belt (102) is composed of a first belt (103) and a second belt (104) connected together by a quick-locking member (4).

3. The hydraulically driven blood flow controlled release device according to claim 2, characterized in that, The quick-locking member (4) includes a clamp (401) for fixing to the end of the first belt (103) and a clamp (402) fixed to the clamp (401) for clamping the second belt (104).

4. The hydraulically driven blood flow controlled release device according to claim 1, characterized in that, The outer wall of the hydraulic cylinder (202) is provided with a protrusion (207), and the connecting part (101) of the control release belt (1) is an annular sleeve (208). The annular sleeve (208) is sleeved from the far end to the near end of the hydraulic cylinder (202) and blocked by the protrusion (207), thereby realizing the quick connection between the connecting part (101) and the hydraulic cylinder (202).

5. The hydraulically driven blood flow controlled release device according to claim 1, characterized in that, The position holding mechanism (6) comprises a pressure control push rod (601) connected to the second piston (303) and an internal threaded sleeve (602) fixed on the pump body (302). The pressure control push rod (601) has an external thread on its body and a rotating part (603) at its distal end. The internal threaded sleeve (602) on the pump body (302) cooperates with the external thread of the pressure control push rod (601). By rotating the pressure control push rod (601) through the rotating part (603), the second piston (303) can be held at any position in the second inner cavity (301) of the pump body (302).

6. The hydraulically driven blood flow controlled release device according to claim 1, characterized in that, A pressure gauge (304) for measuring the liquid pressure in the pipeline (5) is installed at the near end of the pump body (302) or at the far end of the pipeline (5).

7. A hydraulically driven blood flow controlled release device according to claim 6, characterized in that, The pressure gauge (304) is used to indicate the magnitude of the blocking force applied by the controlled release actuator (2) to the controlled release band (1), thereby quantifying the blood flow of the blocked blood vessel or tissue by changing the magnitude of the blocking force of the controlled release band (1).

8. The hydraulically driven blood flow controlled release device according to claim 1, characterized in that, The pressure control component (3) is connected to multiple release control components (2) through multiple pipelines (5), and each release control component (2) is equipped with a release control belt (1) near its proximal end.

9. A hydraulically driven blood flow controlled release device according to claim 8, characterized in that, Each pipeline (5) connected to the pressure control component (3) is equipped with a control valve that controls the on / off state. Each control valve individually controls the control release actuator (2) of its respective pipeline.

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