Blood flow control devices

Abstract

A blood flow control device comprises a sheath tube with a receiving portion, a blood vessel fixing piece with a locking end and a free end, and a control component, wherein the control component can control the blood vessel fixing piece to move in a first direction relative to the sheath tube, so that the blood vessel fixing piece received in the receiving portion is exposed and deformed to bend and circumferentially surround the blood vessel to be blocked, and the locking end of the blood vessel fixing piece can be locked to the sheath tube to form a locking ring to circumferentially lock the blood vessel, and the free end can move in both directions relative to the sheath tube under the control of the control component to adjust the ring diameter of the locking ring, thereby adjusting the pressure applied to the blood vessel, thereby achieving the purpose of controlling the blood flow rate in the blood vessel.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of medical equipment, and in particular to a blood flow control device for controlling the blood flow rate in a blood vessel. Background Art

[0002] During surgical operations, when treating tissues and organs with abundant blood flow, in order to avoid excessive bleeding during the operation, the blood flow rate of the main blood vessels of the tissues and organs is often controlled to reduce the blood supply to the tissues, thereby reducing the risk of excessive bleeding in the target tissues and organs during the operation. For example, in liver resection surgery, the risk of bleeding during liver resection is often reduced by blocking the blood flow of the portal vessels.

[0003] At present, a method commonly used clinically is to expose the blood vessel that needs to control blood flow through surgical dissection, use an elastic winding wire to wrap the target blood vessel, and apply pressure to the target blood vessel by tightening the winding wire to control the blood flow of the target blood vessel; another method is to clamp the target blood vessel with a hemostatic forceps to control the blood flow of the target blood vessel.

[0004] However, the current operation of vascular blood flow control still has the following shortcomings: 1. Whether using winding wire or clamp, it becomes difficult to operate under laparoscope due to the great limitation of operation space, which also restricts many operations that may cause heavy bleeding from being completed smoothly and safely under laparoscope; 2. The operation of using clamp to control blood flow may cause damage to blood vessels, and it cannot effectively achieve the purpose of controlling blood flow; 3. The clamp head does not have enough curvature and cannot clamp the target blood vessels with special structures. If the curvature of the clamp head is too large, it will not be able to pass through the laparoscope operation hole smoothly, which limits its application under laparoscope. 4. In order to make the winding wire wrap around the target blood vessel under laparoscope, multiple steps are required. The increased difficulty and risk of operation also limit the scope of application of this method under laparoscope.

[0005] In view of this, there is a need to provide a blood flow control device that can control the curvature of the device during surgery and surround the target blood vessel to control the blood flow in the blood vessel, especially a surgical auxiliary device that meets the limitations of laparoscopic operation conditions. Summary of the invention

[0006] In view of the above problems, the main purpose of the present application is to provide a blood flow control device and an operating method thereof, which can circumferentially lock the target blood vessel to slow down the blood flow velocity in the blood vessel or completely block the blood flow in the blood vessel, and has the advantages of easy operation and precise blood flow control.

[0007] Another object of the present application is to provide a blood flow control device and an operating method thereof, which can control the curvature of the device used to wrap around a blood vessel and can be suitable for laparoscopic surgery.

[0008] One embodiment of the present application provides a blood flow control device for controlling the blood flow rate in a blood vessel, comprising: a sheath tube, wherein a receiving portion is formed inside the sheath tube, and the sheath tube has a distal opening located at the distal end of the sheath tube; a blood vessel fixing piece, which is slidably mounted in the sheath tube, and the opposite ends of the blood vessel fixing piece respectively have a locking end and a free end, wherein the blood vessel fixing piece can be received in the receiving portion of the sheath tube, or can be exposed from the sheath tube to produce bending deformation and circumferentially surround the blood vessel, and the locking end is used to be detachably locked to the sheath tube, so that the blood vessel fixing piece circumferentially surrounding the blood vessel forms a locking ring, and the blood vessel is circumferentially locked in the locking ring; and a control component, which is used to control the vascular fixing piece to move along the axial direction of the sheath tube relative to the blood vessel. The body of the sheath moves in a first direction or a second direction opposite to the first direction; wherein, when the vascular fixation piece is received in the receiving portion, the control component is used to control the vascular fixation piece to move in the first direction relative to the sheath, so that the locking end of the vascular fixation piece extends out of the sheath through the distal opening, so that the vascular fixation piece is exposed outside the sheath; and when the locking end is locked on the sheath to form the locking ring, the control component is used to control the free end of the vascular fixation piece to move in the first direction or the second direction relative to the sheath, so as to adjust the pressure applied by the locking ring on the blood vessel by adjusting the ring diameter of the locking ring, thereby controlling the blood flow rate in the blood vessel.

[0009] Optionally, in an embodiment of the present application, when the control component controls the free end of the vascular fixation component to move toward the second direction relative to the sheath tube, the ring diameter of the locking ring gradually decreases, and the pressure applied by the locking ring on the blood vessel gradually increases, thereby gradually slowing down the blood flow rate in the blood vessel, or completely blocking the blood flow in the blood vessel; when the control component controls the free end of the vascular fixation component to move toward the first direction relative to the sheath tube, the ring diameter of the locking ring gradually increases, and the pressure applied by the locking ring on the blood vessel gradually decreases, thereby gradually increasing the blood flow rate in the blood vessel.

[0010] Optionally, in an embodiment of the present application, a sheath locking piece is further provided on the sheath, which can detachably lock the locking end of the blood vessel fixing piece to form the locking ring.

[0011] Optionally, in an embodiment of the present application, a locking position and a releasing position are further provided on the sheath locking piece, wherein when the locking end is located at the locking position, the locking end and the sheath locking piece are locked with each other, and when the locking end is located at the releasing position, the locking end and the sheath locking piece can be separated from each other.

[0012] Optionally, in an embodiment of the present application, the locking end is provided with a first magnetic element, and the locking position of the sheath locking piece is provided with a second magnetic element, so as to utilize the magnetic principle to position the locking end at the locking position of the sheath locking piece.

[0013] Optionally, in an embodiment of the present application, the sheath tube locking component further includes a switch unit, which is used to provide the locking end and the sheath tube locking component to be locked with or separated from each other.

[0014] Optionally, in an embodiment of the present application, the control component further includes a driving member, which is used to provide a driving force to drive the blood vessel fixing member to move toward the first direction relative to the sheath tube.

[0015] Optionally, in an embodiment of the present application, the control component also includes: a control body, which is fixedly connected to the sheath; a sliding member, which is arranged in the control body and fixedly connected to the free end of the vascular fixer, and the sliding member can move bidirectionally relative to the control body along the axial direction of the control body to drive the free end of the vascular fixer to move relative to the sheath; and a locking member, which can switch between a release state and a locking state to limit the movement stroke of the sliding member relative to the control body, wherein when the locking member switches to the release state, the sliding member can move relative to the control body, and when the locking member switches to the locking state, the sliding member is positioned at a predetermined position of the control body.

[0016] Optionally, in an embodiment of the present application, the control component also includes: a control body, which has an axial cavity axially passing through the control body, the axial cavity has a non-circular axial cavity cross-section, and the control body can rotate circumferentially relative to the sheath tube; a limiting member, which is movably arranged at the proximal end of the sheath tube and detachably embedded in the axial cavity of the control body, the limiting member has a limiting member cross-section that matches the axial cavity cross-section, so that the limiting member can rotate circumferentially relative to the sheath tube along with the control body, and a first limiting portion is also provided on the limiting member; and a sliding member, the sliding member is passed through the axial cavity and has a first end and a second end located at opposite ends of the sliding member, wherein the first end is exposed from the control body at the proximal end of the control body, and the second end is fixedly connected to the free end of the vascular fixing member via the proximal end of the sheath tube, so that the sliding member can rotate relative to the The sheath is fixed circumferentially, and a second limiting portion is also provided on the sliding member, and the sliding member can move relative to the sheath in the first direction or the second direction along the axial direction of the sheath; and wherein, by controlling the control body to rotate circumferentially relative to the sheath, the limiting member is driven to rotate circumferentially relative to the sliding member, so that the first limiting portion of the limiting member and the second limiting portion on the sliding member are engaged with or released from each other, wherein, when the first limiting portion of the limiting member and the second limiting portion on the sliding member are in a mutually released state, the sliding member can move freely in both directions relative to the sheath in the first direction or the second direction; when the first limiting portion of the limiting member and the second limiting portion on the sliding member are in a mutually locked state, the sliding member can only be moved unidirectionally in the second direction relative to the sheath by applying a force to the first end.

[0017] Optionally, in an embodiment of the present application, the second limiting portion of the sliding member further includes a segmented limiting structure for providing segmented displacement and positioning of the sliding member relative to the sheath tube in the second direction.

[0018] Optionally, in an embodiment of the present application, the limiting member and the sliding member can be detached from the control body respectively to remove the control body from the blood flow control device.

[0019] Optionally, in an embodiment of the present application, the vascular fixator is a hollow member, and the blood flow control device further includes a guide member, which can be inserted into the vascular fixator and provide a preset bending shape, and the guide member is used to cause the vascular fixator to move out of the receiving portion, and to allow the vascular fixator exposed outside the sheath to bend and deform according to the preset bending shape of the guide member.

[0020] Optionally, in an embodiment of the present application, the blood flow control device also includes a pressure regulating component, which is arranged on the inner ring of the locking ring to be clamped between the locking ring and the blood vessel, and the pressure regulating component is used to balance the pressure applied to different positions of the blood vessel and to finely adjust the pressure applied to the blood vessel.

[0021] Optionally, in an embodiment of the present application, the pressure regulating member is a capsule.

[0022] Optionally, in an embodiment of the present application, the blood flow control device also includes a reversing structure, the reversing structure having a first inlet, a second inlet, a first outlet, and a reversing unit, the reversing unit being used to provide switching between a first transmission state and a second transmission state, wherein when the reversing unit switches to the first transmission state, the first inlet is axially parallel to the first outlet to form a first transmission channel, and when the reversing unit switches to the second transmission state, the second inlet is axially parallel to the first outlet to form a second transmission channel.

[0023] Optionally, in an embodiment of the present application, the blood flow control device also includes an electronic control component, which has: a setting unit, which is used to provide a set maximum pressure threshold; an alarm unit, which is used to output an alarm signal; a pressure sensing unit, which is used to sense the pressure applied to the blood vessel by the locking ring formed by the blood vessel fixing device, and output a pressure sensing value; and a control unit, which is used to receive the pressure sensing value output by the pressure sensing unit, and analyze whether the pressure sensing value exceeds the maximum pressure threshold, and when analyzing that the pressure sensing value exceeds the maximum pressure threshold, the alarm unit outputs the alarm signal.

[0024] Optionally, in an embodiment of the present application, the electronic control component also includes a timer for providing timing and outputting corresponding timing values; wherein the setting unit also includes providing a maximum operating time, and the control unit also includes receiving the timing value output by the timer, and when analyzing that the timing value exceeds the maximum operating time, the alarm unit outputs the alarm signal.

[0025] The present application also provides an operating method of a blood flow control device, which comprises: providing the blood flow control device, and storing the blood vessel fixing part of the blood flow control device in the storing part of the sheath tube; when the blood flow control device reaches the blood vessel to be blocked, controlling the blood vessel fixing part to move in the first direction relative to the sheath tube by means of the control component, so that the locking end of the blood vessel fixing part extends out of the sheath tube through the distal opening, and the blood vessel fixing part is pushed out of the storing part to be exposed in the sheath tube; causing the blood vessel fixing part exposed in the sheath tube to bend and deform so as to circumferentially surround the blood vessel; causing the locking end of the blood vessel fixing part to be locked to the sheath tube so as to circumferentially surround the blood vessel The blood vessel fixing piece on the blood vessel forms a locking ring, and the blood vessel is circumferentially locked in the locking ring; the control component is used to control the free end of the blood vessel fixing piece to move relative to the sheath tube toward the second direction, so that the ring diameter of the locking ring is reduced and a blood vessel blocking operation is performed on the blood vessel, thereby slowing down the blood flow rate in the blood vessel or completely blocking the blood flow in the blood vessel; when the blood vessel blocking operation on the blood vessel is completed, the control component is used to control the free end of the blood vessel fixing piece to move relative to the sheath tube toward the first direction, and the locking end of the blood vessel fixing piece is separated from the sheath tube, so as to release the circumferential locking of the blood vessel, thereby restoring the blood flow rate in the blood vessel.

[0026] It can be seen from the above technical scheme that the embodiment of the present application moves the vascular fixation piece housed in the sheath to expose it, so that the exposed vascular fixation piece is bent and deformed and circumferentially surrounds the blood vessel, and the locking end of the vascular fixation piece is locked on the sheath to form a locking ring, so that the blood vessel is circumferentially locked in the locking ring, and then the free end of the vascular fixation piece is controlled to move relative to the sheath to adjust the ring diameter of the locking ring to adjust the pressure applied by the locking ring on the blood vessel, thereby achieving the purpose of slowing down the blood flow velocity in the blood vessel or completely blocking the blood flow in the blood vessel, thereby achieving the technical effect of accurately controlling the blood flow velocity in the blood vessel, and can control the curvature of the instrument used to wrap around the blood vessel, and has the advantages of easy operation and little damage, and is particularly suitable for laparoscopic surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0028] Figures 1 to 3Schematic diagram of a blood flow control device in different use states according to an embodiment of the present application;

[0029] Figure 4A and Figure 4B A schematic side view of the blood flow control device of the present application;

[0030] Figure 5 A schematic diagram of an embodiment of a locking ring formed by the blood flow control device of the present application;

[0031] Fig. 6A and Figure 6B A schematic diagram of another embodiment of a locking ring formed by the blood flow control device of the present application;

[0032] Fig. 7A and Figure 7B This is a schematic diagram of an embodiment of the guide member of the present application;

[0033] FIG. 8A to FIG. 8E This is a schematic structural diagram of a blood flow control device in another embodiment of the present application in different use states;

[0034] Fig. 9 This is a schematic diagram of an embodiment of a pressure regulating member of the present application;

[0035] Fig. 10A and Fig. 10B A schematic diagram of an embodiment of the commutation structure of the present application; and

[0036] Fig.11A This is a schematic diagram of the structure of the electronic control component of this application. Fig. 11B Schematic diagram of the system architecture of the electronic control component.

[0037] Component number

[0038] 1 Blood flow control devices

[0039] 11 Sheath

[0040] 110 Storage Department

[0041] 111 Distal end of sheath (distal opening)

[0042] 112 sheath tube locking piece (locking groove)

[0043] 112A Keyhole

[0044] 1121 Locking position

[0045] 1121A Limiting convex part

[0046] 11211 Second magnetic element

[0047] 1122 Release position

[0048] 1123 Switching unit

[0049] 11231 Toggle

[0050] 11232 Lock tongue

[0051] 113 Proximal end of sheath (proximal opening)

[0052] 12 Vascular Fixation

[0053] 120 Locking ring

[0054] 121 Locking end

[0055] 121A Limit groove

[0056] 121B Locking cylinder

[0057] 121C Lock Slot

[0058] 1211 First Magnetic Element

[0059] 122 Free end

[0060] 13 Control components

[0061] 131 Drive parts

[0062] 132 Control Unit

[0063] 1321 Shaft cavity

[0064] 133 Sliding parts

[0065] 1331 Connection

[0066] 1332 Piston

[0067] 134 Locking piece

[0068] 135 Limited Edition

[0069] 1351 First Limited Section

[0070] 136 Sliding parts

[0071] 1361 First End

[0072] 1363 Second Limited Section

[0073] 13641 / 13642 Segmented limiter (segmented limiter structure)

[0074] 13641a / 13642a Guide surface

[0075] 13641b / 13642b Limited surface

[0076] 14 Guide

[0077] 15 Pressure regulator

[0078] 161 First Entrance

[0079] 162 Second Entrance

[0080] 163 Exit 1

[0081] 164 Reversing unit

[0082] 17 Electronic control components

[0083] 171 Setting unit

[0084] 172 Alarm Unit

[0085] 173 Pressure Sensing Unit

[0086] 174 Control Unit

[0087] 175 Timer

[0088] 2 Blood vessels DETAILED DESCRIPTION

[0089] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the embodiments of the present application should fall within the scope of protection of the embodiments of the present application.

[0090] See also Figures 1 to 3 as well as Figure 4A and Figure 4B ,in, Figures 1 to 3 It is a three-dimensional schematic diagram of the blood flow control device 1 of the present application in different usage states. Figure 4A and Figure 4B The side view schematic diagrams show the blood flow control device 1 in different use states. As shown in the figure, the blood flow control device 1 of the present application is mainly used to control the blood flow velocity of the blood vessel 2, and mainly includes a sheath 11, a blood vessel fixing member 12 and a control component 13.

[0091] The sheath 11 is hollow inside and has a receiving portion 110 formed therein. A distal opening 111 is formed at the distal end of the sheath 11 (ie, the end away from the operator), and a proximal opening 113 is also formed at the proximal end of the sheath 11 (ie, the end close to the operator).

[0092] The blood vessel fixing member 12 is slidably mounted in the sheath tube 11 and can move bidirectionally relative to the body of the sheath tube 11 along the axial direction of the sheath tube 11. Figure 4A and Figure 4B In the present embodiment, the vascular fixing member 12 can be entirely received in the receiving portion 110 of the sheath tube 11, and can also be moved in the first direction F1 relative to the main body of the sheath tube 11 when driven by an external force (e.g., a driving member 131 described later), so as to extend from the inside of the sheath tube 11 through the distal opening 111 of the sheath tube 11, and partially or entirely exposed outside the sheath tube 11, and the exposed vascular fixing member 12 can be bent and deformed to circumferentially surround the blood vessel 2 to be blocked (e.g., Figure 1 status shown).

[0093] In another embodiment, the vascular fixator 12 can be designed as a hollow tube, and the blood flow control device 1 also includes a guide member 14, which can be inserted into the vascular fixator 12. The guide member 14 is, for example, a rigid structure and is used to provide a preset bending shape. The guide member 14 can be used to push the vascular fixator 12 out of the storage portion 110, and allow the vascular fixator 12 exposed outside the sheath 11 to bend and deform according to the preset bending shape provided by the guide member 14 arranged inside the sheath, so that the bending deformation generated by the vascular fixator 12 meets expectations and is suitable for various blood vessels with special structures.

[0094] Furthermore, the two ends of the blood vessel fixing member 12 are respectively a locking end 121 and a free end 122. When the blood vessel fixing member 12 is exposed outside the sheath tube 11, the locking end 121 can be detachably locked with the sheath tube 11, so that the blood vessel fixing member 12 circumferentially surrounding the blood vessel 2 forms a locking ring 120, thereby circumferentially locking the blood vessel 2 to be blocked in the formed locking ring 120 (such as Figure 2 status shown).

[0095] In the present application, the sheath 11 is further provided with a sheath locking member 112, which can be detachably locked with the locking end 121 of the blood vessel fixing member 12 to form a locking ring 120. In one embodiment, the sheath locking member 112 is further provided with a locking position 1121 and a release position 1122, wherein when the locking end 121 is located at the locking position 1121, the locking end 121 and the sheath locking member 112 are locked with each other, and when the locking end 121 is located at the release position 1122, the locking end 121 can be separated from the sheath locking member 112. For details, please refer to Figure 5The sheath locking piece 112 is, for example, a locking groove 112 arranged on the tube wall of the sheath 11, and a locking position 1121 and a releasing position 1122 are arranged in the locking groove 112, wherein a limiting convex portion 1121A is arranged at the locking position 1121, and correspondingly, a limiting groove 121A is arranged at the locking end 121 of the vascular fixing piece 12, and the locking end 121 of the vascular fixing piece 12 can be inserted into the locking groove 112 via the releasing position 1122, and slide from the releasing position 1122 to the locking position 1121, so that the limiting convex portion 1121A of the locking groove 112 and the limiting groove 121A of the locking end 121 are engaged with each other, so that the locking end 121 is locked in the locking groove 112. On the contrary, when the locking end 121 of the blood vessel fixing member 12 slides from the locking position 1121 in the locking groove 112 to the release position 1122, the mutual engagement between the limiting protrusion 1121A of the locking groove 112 and the limiting groove 121A of the locking end 121 is released, so that the locking end 121 can be disengaged from the locking groove 112. In one embodiment of the present application, a first magnetic attraction element 1211 is further provided on the locking end 121 of the blood vessel fixing member 12, and a second magnetic attraction element 11211 is further provided at the locking position 1121 of the sheath locking member 112, so as to utilize the magnetic attraction principle to position the locking end 121 at the locking position 1121 of the sheath locking member 112, and cannot easily slide from the locking position 1121 to the release position 1122, so as to ensure that the blood vessel 2 can be firmly circumferentially locked to the locking ring 120 during the operation.

[0096] It should be noted that the structural arrangement of the sheath tube lock 112 is not limited to the above. In other embodiments, the sheath tube lock 112 may also include a switch unit 1123 for providing the locking end 121 and the sheath tube lock 112 with mutual locking or mutual separation. Figure 6BThe sheath tube locking member 112 includes a locking hole 112A disposed on the tube wall of the sheath tube 11, the switch unit 1123 also includes a toggle member 11231 and a locking tongue 11232 disposed in the locking hole 112, the locking end 121 of the blood vessel fixing member 12 also includes a locking column 121B, and the outer diameter of the locking column 121B is adapted to the aperture of the locking hole 112A, and a locking groove 121C is formed on the locking column 121B. The locking bolt 11232 is retracted by applying a force to the toggle member 11231 to open the interior of the locking hole 112A, so that the locking column 121B of the locking end 121 can be inserted into the locking hole 112A, and then the force applied to the toggle member 11231 is released to make the locking bolt 11232 return to its original position and engage in the locking groove 121C of the locking column 121B, so that the locking column 121B is locked in the locking hole 112A of the sheath locking member 112. In addition, the locking bolt 11232 can be retracted by applying a force to the toggle member 11231 to release the engagement between the locking bolt 11232 and the locking groove 121C, so that the locking column 121B of the locking end 121 is disengaged from the locking hole 112A of the sheath locking member 112.

[0097] The control component 13 is used to control the vascular fixation member 12 to move in a first direction F1 or a second direction F2 opposite to the first direction relative to the main body of the sheath tube 11 along the axial direction of the sheath tube 11. In this embodiment, the vascular fixation member 12 is completely stored in the storage portion 110 of the sheath tube 11 in the initial use state. At this time, the doctor can operate the control component 13 to move the vascular fixation member 12 relative to the main body of the sheath tube 11 in the first direction, so that the locking end 121 of the vascular fixation member 12 extends out of the sheath tube 11 through the distal opening 111 of the sheath tube 11, so as to push the vascular fixation member 12 out of the storage portion 110 and expose it to the outside of the sheath tube 11. Please refer to Figure 4A and Figure 4B In this embodiment, the control assembly 13 further includes a driving member 131, which is used to provide a driving force to drive the blood vessel fixing member 12 to move in the first direction F1 relative to the sheath tube 11. The driving member 131 is, for example, a spring disposed inside the sheath tube 11, so as to use the elastic restoring force of the spring to push the blood vessel fixing member 12 out of the receiving portion 110 (please describe in detail later).

[0098] In addition, when the locking end 121 of the vascular fixing member 12 is locked on the sheath 11 to form a locking ring 120, the free end 122 of the vascular fixing member 12 can be controlled by operating the control component 13 to move in the first direction F1 or the second direction F2 relative to the sheath 11 to adjust the ring diameter of the locking ring 120, thereby adjusting the pressure applied by the locking ring 120 on the blood vessel 2 to control the blood flow rate in the blood vessel. Specifically, when the free end 122 of the vascular fixing member 12 is controlled by the control component 13 to move in the second direction F2 (i.e., the direction close to the operator) relative to the sheath 11, the ring diameter of the locking ring 120 gradually decreases, so that the pressure applied by the locking ring 120 on the blood vessel 2 gradually increases, thereby gradually slowing down the blood flow rate in the blood vessel 2, or completely blocking the blood flow in the blood vessel 2 (e.g., Figure 3 On the contrary, when the control assembly 13 controls the free end 122 of the blood vessel fixing member 12 to move in the first direction F1 (i.e., the direction away from the operator) relative to the sheath tube 11, the ring diameter of the locking ring 120 gradually increases, so that the pressure applied by the locking ring 120 on the blood vessel 2 gradually decreases, thereby gradually increasing the blood flow velocity in the blood vessel 2 (i.e., gradually restoring the blood flow velocity in the blocked blood vessel 2).

[0099] In one embodiment, the control assembly 13 includes a control body 132, a sliding member 133 and a locking member 134. The control body 132 is fixedly connected to the sheath tube 11, and the operator can perform relevant operations on the instrument by holding the control body 132 at an appropriate position.

[0100] The sliding member 133 is disposed in the control body 132 and fixedly connected to the free end 122 of the blood vessel fixing member 12, wherein the sliding member 133 can move bidirectionally relative to the control body 132 along the axial direction of the control body 132 to drive the free end 122 of the blood vessel fixing member 12 to move relative to the body of the sheath tube 11. Figure 4A and Figure 4B As shown, in this embodiment, the sliding member 133 is, for example, a sliding member, one end of which has a connecting portion 1331 fixedly connected to the free end 122. In this embodiment, the connecting portion 1331 can be disposed inside the sheath tube 11 and between the free end 122 and the driving member 131. The other end of the sliding member 133 also includes a piston 1332 disposed in the control body 132, so that the sliding member 133 is driven by the piston 1332 to move smoothly relative to the control body 132.

[0101] The locking member 134 can be switched between a release state and a locking state, and is used to limit the movement stroke of the sliding member 133 relative to the control body 132. When the locking member 134 is switched to the release state, the sliding member 133 (piston 1332) can move relative to the control body 132, and when the locking member 134 is switched to the locking state, the sliding member 133 (piston 1332) is positioned at a predetermined position of the control body 132. Furthermore, the driving member (spring) 131 can be in a compressed state by putting the locking member 134 in the locking state. When the locking member 134 is switched from the locking state to the release state, the driving member (spring) 131 in the compressed state is released, so that the elastic restoring force provided by the driving member 131 causes the connecting portion 1331 of the sliding member 133 to push the blood vessel fixing member 12 in the receiving portion 110 to move in the first direction F1 and be exposed to the sheath tube 11.

[0102] Please continue reading FIG. 8A to FIG. 8E In another embodiment of the present application, the control component 13 further includes a control body 132 , a limiting member 135 , and a sliding member 136 .

[0103] The control body 132 has an axial cavity 1321 axially penetrating the control body 132 , wherein the axial cavity 1321 has a non-circular axial cavity cross-section, and the control body 132 can rotate circumferentially relative to the sheath tube 11 .

[0104] The limiting member 135 is movably connected to the proximal end 113 of the sheath tube 11 and is detachably embedded in the shaft cavity 1321 of the control body 132 (eg, Fig. 8E As shown in FIG. 1 , the limiting member 135 has a limiting member cross section that matches the shaft cavity cross section, so that when the limiting member 135 is embedded in the shaft cavity 1321, it can synchronously rotate relative to the sheath tube 11 as the control body 132 rotates relative to the sheath tube 11 in the circumferential direction, and a first limiting portion 1351 is also provided on the limiting member 135. In this embodiment, the shaft cavity cross section of the shaft cavity 1321 and the limiting member cross section of the limiting member 135 can be set to a hexagon, but this is not limited thereto, and other non-circular cross sections can also be set.

[0105] The sliding member 136 is inserted into the shaft cavity 1321 of the control body 132, and the control body 132 can rotate relative to the sliding member 136. The sliding member 136 has a first end 1361 and a second end (not shown) at opposite ends thereof. The first end 1361 of the sliding member 136 extends out of the shaft cavity 1321 at the proximal end (i.e., the end close to the operator) of the control body 132 and is exposed to the control body 132. The second end of the sliding member 136 is sequentially connected to the limiting member 1321 through the limiting member 1321. 5 and the proximal opening 113 of the sheath tube 11 enter the interior of the sheath tube 11 and are fixedly connected to the free end 122 of the blood vessel fixing member 12, and the sliding member 136 is circumferentially fixed relative to the sheath tube 11, that is, the sliding member 136 cannot rotate circumferentially relative to the body of the sheath tube 11, but can move along the axial direction of the sheath tube 11 relative to the body of the sheath tube 11 in the first direction F1 or the second direction F2, wherein the connection method between the second end of the sliding member 136 and the free end 122 can refer to Figure 4A and Figure 4B In addition, a second limiting portion 1363 is provided on the sliding member 136 .

[0106] The operator can operate the control body 132 to rotate circumferentially relative to the sheath tube 11, so as to drive the limiting member 135 embedded in the axial cavity 1321 to rotate circumferentially relative to the body of the sheath tube 11. As mentioned above, since the sliding member 136 is circumferentially fixed relative to the body of the sheath tube 11, when the limiting member 135 rotates circumferentially relative to the body of the sheath tube 11, it also rotates circumferentially relative to the sliding member 136, so that the first limiting portion 1351 of the limiting member 135 and the second limiting portion 1363 on the sliding member 136 are engaged with or released from each other, wherein, when the first limiting portion 1351 of the limiting member 135 and the second limiting portion 1363 on the sliding member 136 are in a mutually released state, the sliding member 136 can freely move in both directions relative to the sheath tube 11 in the first direction F1 or the second direction F2; and when the first limiting portion 1351 of the limiting member 135 and the second limiting portion 1363 on the sliding member 136 are in a mutually locked state (i.e. Figure 8B The sliding member 136 can only be moved unidirectionally in the second direction F2 relative to the sheath tube 11 by applying a force to the first end 1361 of the sliding member 136.

[0107] In one embodiment, the second limiting portion 1363 on the sliding member 136 further includes a segmented limiting structure for providing the sliding member 136 with respect to the sheath tube 11 with segmented displacement and positioning only in the second direction F2. Figure 8BAs shown, a plurality of segmented limiting parts 13641 / 13642 are provided in the segmented limiting structure, and each segmented limiting part 13641 / 13642 has a guiding surface 13641a / 13642a and a limiting surface 13641b / 13642b, respectively. In the state where the first limiting part 1351 of the limiting member 135 and the second limiting part 1363 on the sliding member 136 are in a mutually locked state, when a force is applied to the first end 1361 of the sliding member 136 to move it along the second direction F2, the first limiting part 1351 of the limiting member 135 is guided by the guiding surface 13642a of the segmented limiting part 13642 to be moved from the segmented limiting part 13642 to the first limiting part 1351 of the limiting member 135. When the first end 1361 is released, the first limiting portion 1351 of the limiting member 135 abuts against the limiting surface 13641b of the segmented limiting portion 13641, and the limiting surface 13641b is used to limit the first limiting portion 1351 of the limiting member 135 from moving in the reverse direction from the segmented limiting portion 13641 to the segmented limiting portion 13642, so as to provide the sliding member 136 with only one-way displacement and segmented positioning relative to the sheath tube 11, and gradually reduce the ring diameter of the locking ring 120 formed by the blood vessel fixing member 12, so as to accurately control the pressure applied by the locking ring 120 on the blood vessel 2 (i.e., from Figure 8C The state shown gradually transforms to Fig.8D The state shown in the figure) is thus gradually slowed down the blood flow speed in the blood vessel 2 until the blood flow in the blood vessel 2 is completely blocked. In this embodiment, the segmented limiting structure is, for example, a limiting rack provided on the sliding member 136.

[0108] Furthermore, the limiting member 135 and the sliding member 136 of the present application can be separated from the shaft cavity 1321 of the control body 132 respectively, so that during the operation, when the blocking state of the blood vessel fixing member 12 for the blood vessel 2 reaches the expected state, the doctor can remove the control body 132 from the blood flow control device 1 alone, thereby facilitating the subsequent operation. The sliding member 136 is made of a soft material, for example.

[0109] Please continue reading Fig. 9 In another embodiment of the present application, the blood flow control device 1 further includes a pressure regulating member 15, which is disposed in the inner ring of the locking ring 120 formed by the blood vessel fixing member 12, and is sandwiched between the locking ring 120 and the blood vessel 2 to be blocked, so that the pressure applied to different positions of the blood vessel 2 tends to be balanced by the pressure regulating member 15, thereby playing a role in finely adjusting the blocking pressure of the blood vessel fixing member 12 on the blood vessel 2, and making the circumferential force of the blood vessel 2 uniform. In this embodiment, the pressure regulating member 15 can be designed as a capsule, such as a water bag structure or an air bag structure.

[0110] Please refer to Fig. 10A and Fig. 10BIn another embodiment, the blood flow control device 1 further includes a reversing structure, wherein the reversing structure has a first inlet 161, a second inlet 162, a first outlet 163, and a reversing unit 164, wherein the reversing unit 164 is used to provide switching between a first transmission state and a second transmission state, wherein when the reversing unit 164 is switched to the first transmission state, the first inlet 161 and the first outlet 163 can be axially parallel to form a first transmission channel, and when the reversing unit 164 is switched to the second reversing state, the second inlet 162 and the first outlet 163 can be axially parallel to form a second transmission channel. Specifically, when performing a surgical operation, the reversing unit 164 can be first switched to the first transmission state (such as Fig. 10A The state shown in the figure) is such that the first inlet 161 and the first outlet 163 are axially parallel to form a first transmission channel. In this state, the sheath 11, the vascular fixing member 12, and the guide member 14 of the blood flow control device 1 can be inserted into the patient's body cavity through the first transmission channel. Since the guide member 14 is a rigid structure, the vascular fixing member 12 can smoothly reach the position of the blood vessel 2 to be blocked under the guidance of the guide member 14. At the same time, the guide member 14 can cause the vascular fixing member 12 to extend from the receiving portion 110 to be exposed in the sheath 11, and the exposed vascular fixing member 12 is completely deformed under the action of the guide member 14 and circumferentially surrounds the blood vessel 2 to be blocked. After the locking end 121 of the vascular fixing member 12 is locked on the outer sheath 11 to form a locking ring 120, the guide member 14 can be withdrawn through the first transmission channel. Then, the reversing unit 164 can be switched to the second transmission state (i.e. Fig. 10B The second inlet 162 is axially parallel to the first outlet 163 to form a second transmission channel, and other laparoscopic surgical instruments enter the patient's body cavity through the formed second transmission channel.

[0111] Please continue reading Fig.11A and Fig. 11B In this embodiment, the blood flow control device 1 further includes an electronic control component 17 , which has a setting unit 171 , an alarm unit 172 , a pressure sensing unit 173 , and a control unit 174 .

[0112] The setting unit 171 is used to provide the operator with a preset maximum pressure threshold, that is, to provide the maximum pressure value that the vascular fixing member 12 can apply to the blood vessel 2 to be blocked, so as to prevent the blood vessel 2 from being damaged by excessive pressure. The alarm unit 172 is used to output an alarm signal. The pressure sensing unit 173 can be, for example, set at the inner ring of the vascular fixing member 12 to sense the pressure applied to the blood vessel 2 by the locking ring 120 formed by the vascular fixing member 12, and output the corresponding pressure sensing value. The control unit 174 is used to receive the pressure sensing value output by the pressure sensing unit 173, and analyze whether the sensed pressure sensing value exceeds the maximum pressure threshold set by the setting unit 171, and when it is analyzed that the received pressure sensing value exceeds the set maximum pressure threshold, the alarm unit 172 is used to output an alarm signal to remind the operator to adjust the ring diameter of the locking ring 120 in time.

[0113] In another embodiment, a timer 175 may be provided in the electronic control component 17 to provide timing and output a corresponding timing value. The operator may also preset a maximum operation time through the setting unit 171, that is, the maximum time that the blood vessel 2 is in the blocked state. When the blocking operation of the blood vessel 2 is completed, the timer 175 starts timing and outputs a corresponding timing value to the control unit 174, so that when the control unit 174 analyzes that the current timing value exceeds the preset maximum operation time, the alarm unit 172 outputs an alarm signal to remind the operator to adjust the ring diameter of the locking ring 120 in time.

[0114] The operation method of the blood flow control device 1 of the present application mainly includes: providing a blood flow control device 1, in the initial state, the blood vessel fixing member 12 of the blood flow control device 1 is received in the receiving portion 110 of the sheath tube 11. When the blood flow control device 1 reaches the blood vessel 2 to be blocked, the control component 13 can be used to control the blood vessel fixing member 12 to move in the first direction F1 relative to the sheath tube 11, so that the locking end 121 of the blood vessel fixing member 12 extends out of the sheath tube 11 through the distal opening 111, and the blood vessel fixing member 12 is pushed out of the receiving portion 110 to be exposed in the sheath tube 11. Then, the blood vessel fixing member 12 exposed in the sheath tube 11 can be bent and deformed to circumferentially surround the blood vessel 2 to be blocked, and then the locking end 121 of the blood vessel fixing member 12 is locked to the sheath tube 11, so that the blood vessel fixing member 12 circumferentially surrounding the blood vessel 2 forms a locking ring 120, and the blood vessel 2 to be blocked is circumferentially locked in the formed locking ring 120. Next, the control component 13 controls the free end 122 of the blood vessel fixing member 12 to move in the second direction F2 relative to the sheath tube 11, so that the ring diameter of the formed locking ring 120 is gradually reduced, thereby performing a blood vessel blocking operation on the blood vessel 2 to be blocked, so as to slow down the blood flow rate in the blood vessel 2 or completely block the blood flow in the blood vessel. When the blood vessel blocking operation on the blood vessel 2 is completed, the control component 13 controls the free end 122 of the blood vessel fixing member 12 to move in the first direction F1 relative to the sheath tube 11, and separates the locking end 121 of the blood vessel fixing member 12 from the sheath tube 11, so as to release the circumferential locking state of the blood vessel fixing member 12 on the blood vessel 2, so as to restore the blood flow rate in the blood vessel 2.

[0115] In one embodiment, when using Figures 1 to 4B When the blood flow control device 1 shown in the figure performs a blood vessel blocking operation, first, the sheath tube 11 of the blood flow control device 1 and the blood vessel fixing member 12 built therein are moved to the position of the blood vessel 2 to be blocked in the patient's body through the first transmission channel formed by the reversing structure; then, the operator can switch the locking member 134 to the release state, so that the blood vessel fixing member 12 is driven by the driving member 131 to move out of the receiving portion 110 through the distal end opening 111 of the sheath tube 11 to be exposed in the sheath tube 11, and the exposed blood vessel fixing member 12 can be bent and deformed to circumferentially surround the blood vessel 2 to be blocked (such as Figure 1 and Figure 4B The blood vessel fixing member 12 is then locked to the sheath locking member 112 of the sheath tube 11 by locking the locking end 121 of the blood vessel fixing member 12 to form a locking ring 120 to circumferentially lock the blood vessel 2 to be blocked therein, thereby completing the presetting operation of the blood flow control device 1 (such as Figure 2 status shown).

[0116] When cutting organ tissue, the operator can slide the piston 1332 in the control body 132 outside the body (i.e., move the piston 1332 in the second direction F2 relative to the control body 132), thereby driving the free end 122 of the blood vessel fixing member 12 to move in the second direction F2 relative to the sheath tube 11, so that the diameter of the locking ring 120 formed by the blood vessel fixing member 12 gradually decreases, and the diameter of the locking ring 120 can be controlled by adjusting the state of the locking member 134 and the sliding stroke of the piston 1332 in the control body 132, thereby adjusting the blood flow rate in the blood vessel 2. Then, the operator can switch the locking member 134 from the release state to the locking state to achieve continuous blocking of the blood vessel 2 (such as Figure 3 When the blood vessel blocking operation is finished, the operator opens the locking member 134 in vitro to switch it to the released state, so that the free end 122 of the blood vessel fixing member 12 can move in the first direction F1 relative to the sheath tube 11, thereby restoring the blood supply in the blood vessel 2. Then, by releasing the locking state between the locking end 121 of the blood vessel fixing member 12 and the sheath tube locking member 112, the blood vessel fixing member 12 can be removed.

[0117] In another embodiment, when using Fig. 6A , Figure 6B , FIG. 8A to FIG. 8E When the blood flow control device 1 shown in the figure performs a blood vessel blocking operation, first, the sheath tube 11 of the blood flow control device 1 and the blood vessel fixing member 12 built therein are partially moved to the position of the blood vessel 2 to be blocked in the patient's body through the first transmission channel formed by the reversing structure; then, the blood vessel fixing member 12 is pushed to be moved out of the storage portion 110 through the distal opening 111 of the sheath tube 11 to be exposed in the sheath tube 11, and the exposed blood vessel fixing member 12 can be bent and deformed to circumferentially surround the blood vessel 2 to be blocked, and then the locking end 121 of the blood vessel fixing member 12 is locked to the sheath locking member 112 of the sheath tube 11, so that the blood vessel fixing member 12 forms a locking ring 120 to circumferentially lock the blood vessel 2 to be blocked therein, thereby completing the preset operation of the blood flow control device 1 (such as Figure 8C status shown).

[0118] When cutting organ tissue, the operator can rotate the control body 132 to make the limiting member 135 embedded in the axial cavity 1321 of the control body 132 rotate circumferentially relative to the sliding member 136, so that the first limiting portion 1351 on the limiting member 135 and the second limiting portion 1363 on the sliding member 136 are aligned with each other (interlocked), and then by pulling the first end 1361 of the sliding member 136 in the second direction F2, the sliding member 136 can be moved relative to the sheath tube 11 in the second direction F2. 2 moves, thereby driving the free end 122 of the blood vessel fixing member 12 to move unidirectionally in the second direction F2 relative to the sheath tube 11, so that the ring diameter of the locking ring 120 formed by the blood vessel fixing member 12 gradually decreases, and by positioning the first limiting portion 1351 on the limiting member 135 in different segmented limiting portions 13642 of the second limiting portion 1363, the ring diameter of the locking ring 120 can be controlled to adjust the blood flow velocity in the blood vessel 2, so as to achieve continuous blocking of the blood vessel 2 (such as Fig.8D At this time, the operator can remove the control body 132 from the blood flow control device 1, leaving only the sliding member 136 extending outside the body along the first transmission channel, so as to facilitate subsequent surgical operations, and because the first limiting portion 1351 on the limiting member 135 and the second limiting portion 1363 on the sliding member 136 are in a one-way self-locking state, it can ensure that the blood vessel 2 remains blocked during the operation.

[0119] When the blood vessel blocking operation is finished, the control body 132 can be re-inserted along the sliding member 136 so that the limiting member 135 is re-embedded in the axial cavity 1321 of the control body 132, and the first limiting portion 1351 of the limiting member 135 and the second limiting portion 1363 of the sliding member 136 can be unlocked by rotating the control body 132 in vitro, so that the free end 122 of the blood vessel fixing member 12 can move in the first direction F1 relative to the sheath tube 11, thereby restoring the blood supply state in the blood vessel 2. Then, by releasing the locking state between the locking end 121 of the blood vessel fixing member 12 and the sheath locking member 112, the blood vessel fixing member 12 can be withdrawn.

[0120] In summary, the blood flow control device of the present application forms a locking ring by bending and deforming the exposed vascular fixing part and locking it to the outer sheath, thereby circumferentially locking the blood vessel to be blocked, and then operates the control component to move the free end of the vascular fixing part relative to the sheath to adjust the ring diameter of the formed locking ring, and then adjusts the pressure applied by the locking ring to the blood vessel to be blocked, thereby achieving the purpose of slowing down the blood flow rate in the blood vessel or completely blocking the blood flow in the blood vessel, and can achieve the technical effect of accurately controlling the blood flow rate in the blood vessel.

[0121] In addition, after completing the blood flow blocking operation on the blood vessel, the control body can be removed from the blood flow control device to facilitate subsequent surgical operations, and by switching between the first transmission channel and the second transmission channel through the reversing structure, relevant components of the blood flow control device can be inserted separately or other laparoscopic surgical instruments can be inserted. Therefore, the present application is particularly suitable for laparoscopic surgery and has the advantages of easy operation and less damage.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A blood flow control device for controlling the blood flow velocity in a blood vessel, characterized in that: include: A sheath tube, wherein a receiving portion is formed inside the sheath tube and a distal opening is located at a distal end of the sheath tube; a blood vessel fixing member slidably mounted in the sheath tube, and having a locking end and a free end at opposite ends thereof, wherein the blood vessel fixing member can be received in the receiving portion of the sheath tube, or can be exposed from the sheath tube to bend and deform to circumferentially surround the blood vessel, and the locking end is used to be detachably locked to the sheath tube, so that the blood vessel fixing member circumferentially surrounding the blood vessel forms a locking ring, and the blood vessel is circumferentially locked in the locking ring; and A control component is used to control the blood vessel fixing member to move along the axial direction of the sheath tube relative to the body of the sheath tube in a first direction or a second direction opposite to the first direction; wherein, When the vascular fixation member is received in the receiving portion, the control component controls the vascular fixation member to move relative to the sheath toward the first direction, so that the locking end of the vascular fixation member extends out of the sheath through the distal opening, so that the vascular fixation member is exposed outside the sheath; and When the locking end is locked onto the sheath to form the locking ring, the control component is used to control the free end of the blood vessel fixing member to move toward the first direction or the second direction relative to the sheath, so as to adjust the pressure applied by the locking ring on the blood vessel by adjusting the ring diameter of the locking ring, thereby controlling the blood flow rate in the blood vessel.

2. The blood flow control device according to claim 1, characterized in that: When the control component controls the free end of the blood vessel fixing member to move toward the second direction relative to the sheath tube, the ring diameter of the locking ring gradually decreases, and the pressure applied by the locking ring on the blood vessel gradually increases, thereby gradually slowing down the blood flow velocity in the blood vessel, or completely blocking the blood flow in the blood vessel; When the control component controls the free end of the blood vessel fixing member to move toward the first direction relative to the sheath, the ring diameter of the locking ring gradually increases, and the pressure applied by the locking ring on the blood vessel gradually decreases, thereby gradually increasing the blood flow rate in the blood vessel.

3. The blood flow control device according to claim 1, characterized in that: The sheath is also provided with a sheath locking piece, which can detachably lock the locking end of the blood vessel fixing piece to form the locking ring.

4. The blood flow control device according to claim 3, characterized in that: A locking position and a releasing position are also provided on the sheath locking piece, wherein when the locking end is located at the locking position, the locking end and the sheath locking piece are locked with each other, and when the locking end is located at the releasing position, the locking end and the sheath locking piece can be separated from each other.

5. The blood flow control device according to claim 4, wherein: The locking end is provided with a first magnetic element, and the locking position of the sheath locking piece is provided with a second magnetic element, so that the locking end is positioned at the locking position of the sheath locking piece by utilizing the magnetic attraction principle.

6. The blood flow control device according to claim 3, wherein: The sheath tube locking piece further comprises a switch unit, which is used to provide the locking end and the sheath tube locking piece to be locked with or separated from each other.

7. The blood flow control device according to claim 1, characterized in that: The control assembly further includes a driving member for providing a driving force to drive the blood vessel fixing member to move toward the first direction relative to the sheath tube.

8. The blood flow control device according to claim 1 or 7, characterized in that: The control component also includes: A control body fixedly connected to the sheath tube; a sliding member, which is disposed in the control body and fixedly connected to the free end of the blood vessel fixing member, and the sliding member can move bidirectionally relative to the control body along the axial direction of the control body to drive the free end of the blood vessel fixing member to move relative to the sheath; and A locking member that can be switched between a release state and a locking state to limit the movement stroke of the sliding member relative to the control body, wherein when the locking member is switched to the release state, the sliding member can move relative to the control body, and when the locking member is switched to the locking state, the sliding member is positioned at a predetermined position of the control body.

9. The blood flow control device according to claim 1 or 7, characterized in that: The control component also includes: A control body, which has an axial cavity axially penetrating the control body, the axial cavity has a non-circular axial cavity cross section, and the control body can rotate circumferentially relative to the sheath tube; a limiting member, which is movably disposed at the proximal end of the sheath tube and detachably embedded in the shaft cavity of the control body, the limiting member having a limiting member cross-section adapted to the shaft cavity cross-section so that the limiting member can rotate circumferentially relative to the sheath tube along with the control body, and the limiting member is further provided with a first limiting portion; and A sliding member, the sliding member is inserted into the shaft cavity and has a first end and a second end located at opposite ends of the sliding member, wherein the first end extends out of the control body at the proximal end of the control body, and the second end is fixedly connected to the free end of the blood vessel fixing member via the proximal end of the sheath tube, so that the sliding member is circumferentially fixed relative to the sheath tube, a second limiting portion is also provided on the sliding member, and the sliding member can move relative to the sheath tube in the first direction or the second direction along the axial direction of the sheath tube; and wherein, The control body is controlled to rotate circumferentially relative to the sheath tube to drive the limiting member to rotate circumferentially relative to the sliding member, so that the first limiting portion of the limiting member and the second limiting portion on the sliding member are engaged with or released from each other, wherein when the first limiting portion of the limiting member and the second limiting portion on the sliding member are in a mutually released state, the sliding member can freely move in both directions relative to the sheath tube in the first direction or the second direction; when the first limiting portion of the limiting member and the second limiting portion on the sliding member are in a mutually locked state, the sliding member can only be moved unidirectionally in the second direction relative to the sheath tube by applying a force to the first end.

10. The blood flow control device according to claim 9, characterized in that: The second limiting portion of the sliding member further includes a segmented limiting structure for providing segmented displacement and positioning of the sliding member relative to the sheath tube in the second direction.

11. The blood flow control device according to claim 9, characterized in that: The limiting member and the sliding member can be separated from the control body respectively so as to remove the control body from the blood flow control device.

12. The blood flow control device according to claim 1, characterized in that: The vascular fixation piece is a hollow piece, and the blood flow control device also includes a guide piece, which can be inserted into the vascular fixation piece and provide a preset bending shape. The guide piece is used to cause the vascular fixation piece to move out of the receiving portion, and to allow the vascular fixation piece exposed outside the sheath to bend and deform according to the preset bending shape of the guide piece.

13. The blood flow control device according to claim 1, characterized in that: The blood flow control device also includes a pressure regulating component, which is arranged on the inner ring of the locking ring to be clamped between the locking ring and the blood vessel. The pressure regulating component is used to balance the pressure applied to different positions of the blood vessel and to finely adjust the pressure applied to the blood vessel.

14. The blood flow control device according to claim 13, characterized in that: The pressure regulating member is a capsule.

15. The blood flow control device according to claim 1, characterized in that: The blood flow control device also includes a reversing structure, which has a first inlet, a second inlet, a first outlet, and a reversing unit, wherein the reversing unit is used to provide switching between a first transmission state and a second transmission state, wherein when the reversing unit switches to the first transmission state, the first inlet is axially parallel to the first outlet to form a first transmission channel, and when the reversing unit switches to the second transmission state, the second inlet is axially parallel to the first outlet to form a second transmission channel.

16. The blood flow control device according to claim 1, characterized in that: The blood flow control device also includes an electronic control component, which has: A setting unit, which is used to set a maximum pressure threshold; An alarm unit, which is used to output an alarm signal; a pressure sensing unit, configured to sense the pressure applied to the blood vessel by the locking ring formed by the blood vessel fixing member and output a pressure sensing value; and The control unit is used to receive the pressure sensing value output by the pressure sensing unit, analyze whether the pressure sensing value exceeds the maximum pressure threshold, and when the pressure sensing value exceeds the maximum pressure threshold, enable the alarm unit to output the alarm signal.

17. The blood flow control device according to claim 16, characterized in that: The electronic control component also includes a timer for providing timing and outputting corresponding timing values; wherein, The setting unit also includes providing a setting of a maximum operation time, and the control unit also includes receiving the timing value output by the timer, and when analyzing that the timing value exceeds the maximum operation time, causing the alarm unit to output the alarm signal.

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