Tendon retractor

Abstract

The application discloses a tendon puller and belongs to the field of medical devices. The tendon puller comprises a sheath pipe, a clamping part and a scope. The sheath pipe comprises an execution end part provided with a balloon, and the balloon is partially arranged inside the sheath pipe. The clamping part comprises a plurality of clamping claws which are rotationally connected to the inner wall of the sheath pipe and partially extend out of the sheath pipe. The clamping claws are arranged in an annular array around the central axis of the sheath pipe. The clamping claws are connected to the balloon. When the balloon is contracted, the clamping claws are maintained in an initial position. When the balloon is expanded, the clamping claws are driven to rotate along the radial direction of the sheath pipe to a clamping position. The clamping claws which rotate to the clamping position abut against the adjacent clamping claws. The scope is sleeved to the sheath pipe. When the clamping claws are in the initial position, the scope obtains the visual field of the execution end part in the direction away from the sheath pipe. When the clamping claws move from the initial position to the clamping position, the visual field of the scope gradually decreases. Through the above arrangement, the tendon puller can be inserted into the tendon sheath and conveniently take out the broken end of the tendon.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and particularly relates to a tendon retractor. Background Art

[0002] During clinical tenosynovitis surgery, an incision is usually made at the proximal end of the thumb to relieve the pressure on the tendon by cutting through the narrow tendon sheath. However, the patient's tendon may rupture during the operation, and the ruptured tendon needs to be re-sutured afterwards. The ruptured tendon retracts toward the distal end of the sheath when the patient exerts force, and the retraction position cannot be determined. Therefore, it is more difficult to restore the tendon to its original position after finding the tendon.

[0003] After the tendon is retracted into the sheath, the stump may retract to the wrist or even further away from the thumb. During the current operation, one or more incisions are usually made along the sheath distribution path of the patient's arm based on the doctor's experience. A clamp is used to pull the found tendon stump out from one incision and place it in an adjacent incision closer to the thumb. The tendon is then stretched toward the thumb under the clamp and extended from the next adjacent incision. The above operation is repeated until the tendon stump extends from the opening proximal to the thumb. This treatment method will leave multiple incisions on the patient's arm, causing a large amount of bleeding in the patient. Moreover, when the clamp pulls the tendon into the sheath, the wound will be further enlarged, increasing the risk of incision exposure and tissue trauma.

[0004] Therefore, a device is designed to remove the contracted tendon through a wound connected to the tendon sheath. The device is specifically a tendon retractor. Summary of the Invention

[0005] In order to overcome the problems mentioned in the background art, a tendon retractor in the form of an elongated tube is proposed. The tendon retractor can be inserted into the tendon sheath through a single incision and, after finding the retracted tendon, can be clamped. Specifically, the present invention adopts the following technical solution: a tendon retractor comprises: a sheath, the sheath comprising an actuator end portion surrounded by a balloon, the balloon portion being located within the sheath; a clamping portion comprising a plurality of jaws rotatably connected to the inner wall of the sheath and partially extending outside the sheath, the jaws being arranged in a circular array around the central axis of the sheath; the jaws being connected to the balloon, maintaining the jaws in an initial position when the balloon is deflated, and driving the jaws to rotate radially along the sheath to a clamping position when the balloon is inflated, whereby the jaws rotated to the clamping position abut against adjacent jaws; a scope, sleeved on the sheath, wherein when the jaws are in the initial position, the scope obtains a field of view of the actuator end portion facing away from the sheath; and as the jaws move from the initial position to the clamping position, the field of view of the scope gradually decreases. The inner diameter of the sheath is no larger than that of the tendon sheath, and it can rotate along its own radial direction, so that it can be inserted into the tendon sheath through the wound and move along the tendon sheath in the direction of retraction of the ruptured tendon. The jaws remain open in the sheath and extend a portion outward, thereby forming a capture area. The portion of the balloon inside the sheath is connected to the outer wall of the jaws, so when the uninflated balloon is close to the inner wall of the sheath, the jaws open and remain in the initial position. When the jaws are in the initial position, the endoscope faces the inside of the tendon sheath, and the portion of the jaws outside the sheath can contact the tendon before the sheath. When the jaws are gradually closed by the inflated balloon, the part of the tendon clamped will move a certain distance into the sheath along the axial direction of the sheath as the jaws rotate around the axis.

[0006] Furthermore, the jaws include a connecting segment located within the sheath and a capturing segment located outside the sheath. The connecting segment is rotatably connected to the inner wall of the sheath, and the end of the capturing segment facing away from the sheath has an arc extending outward radially along the sheath. When the jaws are in an initial position, a capturing region is formed between the capturing segments of the multiple jaws, and the maximum outer diameter of the capturing region is no less than the outer diameter of the sheath. The capturing segment has an outward arc, so that the inner diameter of the capturing region varies along the axial direction of the sheath, with the inner diameter of the capturing region being the largest at the end away from the sheath.

[0007] Furthermore, the capture section is provided with an arc-shaped surface on the side facing the central axis of the sheath, and the arc-shaped surface is evenly distributed with a number of protrusions. When the jaws rotate and close, the protrusions squeeze the outer wall of the tendon stump and push the tendon stump into the sheath. The protrusions and the arc-shaped surface have different areas, and the depths to which they sink into the outer wall of the tendon stump when the jaws squeeze the tendon stump are also different. Therefore, the protrusions and the arc-shaped surface exert different pressures on the outer wall of the tendon stump, thereby forming multiple squeezing areas with different pressures on the surface of the tendon stump when squeezing the tendon stump. Therefore, the force relationship of the tendon stump when in contact with the jaws is more complicated, making it more difficult for the tendon stump to slip out of the grip of the jaws.

[0008] Furthermore, the actuating end is surrounded by several positioning light beads. When the sheath moves within the tendon sheath, the positioning light beads face the inner wall of the tendon sheath, and the light beams released by these positioning light beads form multiple light paths between the tendon sheath and the skin surface. Even if the sheath rotates circumferentially within the patient's tendon sheath, the multiple positioning light beads arranged around the outer wall of the sheath ensure that the light path remains.

[0009] Furthermore, a boss is provided between the capture section and the connecting section. When the jaws move to the clamping position, the bosses of adjacent jaws approach each other. When the capture section squeezes the tendon end, the tendon end is pushed between the bosses so that the tendon end is squeezed by the capture section and the boss at the same time.

[0010] Furthermore, an elastic flap is arranged around the inside of the sheath tube. When the endoscope is inserted into the sheath tube, the inner wall of the elastic flap is pressed against the outer wall of the endoscope, and the elastic flap maintains the endoscope in a coaxial position with the sheath tube; the elastic flap that tightens the endoscope divides the space inside the sheath tube into a front section and a rear section, and the front section and the rear section are not connected to each other.

[0011] Furthermore, the sheath also includes an operating end, a delivery tube is axially arranged inside the sheath, one end of the delivery tube is connected to the balloon, and the other end of the delivery tube extends outward through the operating end and is connected to a negative pressure device; the endoscope part is sleeved on the sheath, and the remaining part of the endoscope extends outward through the operating end and is connected to the imaging system.

[0012] Furthermore, a suction tube is provided in the sheath, one end of the suction tube is located in the front section of the sheath, and the other end of the suction tube passes through the elastic flap and the rear section and extends outward through the operating end; when the suction tube is connected to the negative pressure device, negative pressure is formed in the front section of the sheath and the contents that block the field of view of the endoscope are sucked out.

[0013] Furthermore, an infusion tube is provided in the sheath, one end of the infusion tube is located in the front section of the sheath, and the other end of the infusion tube passes through the elastic flap and the rear section and extends outward through the operating end; the fluid entering the front section through the infusion tube cleans the front section and can be separated from the sheath through the suction tube.

[0014] Furthermore, the inner wall of the sheath tube is provided with an axial hole, and the clamping jaw is provided with a connecting shaft, and the connecting shaft is rotatably sleeved on the axial hole.

[0015] The beneficial effects of the present invention are as follows: 1. The present invention is provided with a sheath, and a balloon is provided at the execution end of the sheath, and a clamp is provided around the inside of the sheath, and the part of the balloon inside the sheath is connected to the outer wall of the clamp, so when the unexpanded balloon is close to the inner wall of the sheath, the clamp opens and stays in the initial position; and when the clamp passes over the tendon stump, the part of the balloon inside the tendon sheath presses the clamp inward to rotate and close it, and at the same time, the part of the balloon outside the sheath can flexibly expand the tendon sheath outward, so as to reduce the friction between the tendon stump and the inner wall of the tendon sheath during the process of the tendon stump being separated from the sheath, thereby correspondingly reducing the obstruction of the inner wall of the tendon sheath to the tendon stump when the sheath is separated.

[0016] 2. The present invention is provided with a endoscope. When the jaws are opened to the initial position, the user can obtain the visual field inside the tendon sheath in front of the sheath through the endoscope, so as to determine the position of the tendon stump; when the jaws are rotated and closed and the sheath is pulled outward, the user can also observe the clamping of the tendon stump by the jaws through the endoscope, which can avoid the situation that the jaws do not clamp the tendon stump after the sheath is pulled out, which helps to greatly reduce the difficulty and time of the surgical operation, and thus helps to improve the success rate of the patient's tendon connection, while reducing the additional damage caused by the current treatment method. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0018] Figure 1 A schematic diagram of the overall structure of the present invention when the clamping jaws are in the initial position and there are two clamping jaws;

[0019] Figure 2 for Figure 1 A schematic diagram of a local structural cross-section at point A in the middle;

[0020] Figure 3 for Figure 1 A schematic cross-sectional view of a local structure at point B in the middle;

[0021] Figure 4 for Figure 1 Another schematic cross-sectional view of the local structure at A in the middle;

[0022] Figure 5 for Figure 1 Another schematic cross-sectional view of the local structure at point B in the middle;

[0023] Figure 6 A schematic diagram of the overall structure of the present invention when the clamping jaws move to the clamping position and there are two clamping jaws;

[0024] Figure 7 for Figure 6 A schematic cross-sectional view of a local structure at point C in the middle;

[0025] Figure 8 for Figure 6 Another schematic cross-sectional view of the local structure at point C in the middle;

[0026] Figure 9 for Figure 7 Schematic diagram of the structure when the gripper is not assembled;

[0027] Figure 10 A schematic diagram of the structure of the gripper;

[0028] In the figure, 1. sheath; 11. execution end; 111. positioning lamp bead; 12. balloon; 13. elastic flap; 14. front section; 15. rear section; 16. operation end; 17. suction tube; 18. infusion tube; 19. axial hole; 10. delivery tube; 2. clamping part; 21. clamping claw; 211. connecting section; 212. capturing section; 2121. arc surface; 2122. protrusion; 213. boss; 214. connecting shaft; 3. endoscope; 31. lens; 32. lead wire; 33. protective layer. DETAILED DESCRIPTION

[0029] The following is a clear and complete description of the technical solutions in the embodiments of the present invention through specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation methods. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] A tendon retractor, such as Figure 1-10As shown, it includes: a sheath 1, the sheath 1 includes an execution end 11 with a balloon 12 arranged around it, and the balloon 12 is partially located inside the sheath 1; a clamping part 2, including a plurality of jaws 21, the jaws 21 are rotatably connected to the inner wall of the sheath 1 and partially extend out of the sheath 1, and the jaws 21 are distributed in a circular array around the central axis of the sheath 1; the jaws 21 are connected to the balloon 12, and the balloon 12 maintains the jaws 21 in an initial position when the balloon 12 contracts, and drives the jaws 21 to rotate along the radial direction of the sheath 1 to a clamping position when the balloon 12 expands, and the jaws 21 rotated to the clamping position are pressed against the adjacent jaws 21; a scope 3 is sleeved on the sheath 1, and when the jaws 21 are in the initial position, the scope 3 obtains a field of view of the execution end 11 away from the sheath 1; when the jaws 21 move from the initial position to the clamping position, the field of view of the scope 3 gradually decreases. The inner diameter of the sheath 1 is no larger than that of the tendon sheath and can rotate in its own radial direction, making it easy to enter the tendon sheath through the wound and move along the tendon sheath in the direction of retraction of the ruptured tendon. The jaws 21 remain open within the sheath 1 and extend partially outward, thereby forming a capture area. When the position of the actuator end 11 within the tendon sheath is aligned with the tendon, the end of the jaw 21 facing away from the sheath 1 has already passed the stump of the tendon in the axial direction of the tendon sheath. At this time, the closed jaws 21 apply pressure inward in the radial direction of the tendon at multiple locations on the outer wall of the stump of the tendon, so that the tendon is evenly stressed when clamped, which helps prevent slippage caused by uneven stress. The portion of the balloon 12 inside the sheath 1 is connected to the outer wall of the jaws 21. Therefore, when the uninflated balloon 12 is pressed against the inner wall of the sheath 1, the jaws 21 are open and stagnant in their initial position. When the jaws 21 pass over the stump of the tendon, the portion of the balloon 12 inside the tendon sheath presses the jaws 21 inward, causing them to rotate and close, while the portion of the balloon 12 exposed outside the sheath 1 stretches the tendon sheath outward, thereby reducing friction between the tendon and the inner wall of the tendon sheath when the sheath 1 is released from the tendon sheath after the tendon is clamped, thereby reducing the risk of detachment from the jaws 21. When the jaws 21 are in their initial position, the endoscope 3 faces the interior of the tendon sheath. The portion of the jaws 21 outside the sheath 1 can contact the tendon before the sheath 1. When the jaws 21 gradually close under the drive of the inflated balloon 12, the clamped portion of the tendon will move a certain distance into the sheath 1 along the axial direction of the sheath 1 as the jaws 21 rotate around the axis. Although the closed jaws 21 block the endoscope 3's view outside the sheath 1, the end of the clamped tendon faces the endoscope 3 within the sheath 1, allowing the user to visually determine whether the tendon is being clamped by the jaws 21 through the endoscope 3. The inner wall of the sheath 1 is provided with an axial hole 19, and the jaws 21 are provided with a connecting shaft 214, which is rotatably sleeved into the axial hole 19. The endoscope 3 includes a lens 31 and a lead wire 32, which is also covered with a protective layer 33. When the endoscope 3 is assembled with the sheath 1, the elastic flap 13 abuts against the protective layer 33.

[0031] In some embodiments of the present application, Figure 1-10As shown, the jaw 21 includes a connecting section 211 located inside the sheath tube 1 and a capturing section 212 located outside the sheath tube 1. The connecting section 211 is rotatably connected to the inner wall of the sheath tube 1, and the end of the capturing section 212 facing away from the sheath tube 1 has an arc extending radially outward along the sheath tube 1; when the jaw 21 is in the initial position, a capturing area is formed between the capturing sections 212 of multiple jaws 21, and the maximum outer diameter of the capturing area is not less than the outer diameter of the sheath tube 1. The capture section 212 has an outward curvature, so that the inner diameter of the capture area varies along the axial direction of the sheath 1, and the inner diameter of the capture area at the end away from the sheath 1 is the largest; and when the tendon stump enters the capture area and contacts the capture section 212, the arc-shaped inner wall can generate a component force pointing to the central axis of the sheath 1 at the part that contacts the tendon stump, which makes it easier for the tendon stump to enter the capture area and continue to move after contacting the capture section 212, which is beneficial to reduce the pushing on the tendon stump and avoid the situation where the tendon stump contacts the clamp 21 and is pushed by the moving clamp 21 to move deeper into the tendon sheath. In the process of the clamp 21 rotating from the initial position to the clamping position, the arc-shaped capture section 212 always applies pressure to the tendon stump with the contact surface with the arc to increase the friction generated by the contact.

[0032] In some embodiments of the present application, Figure 1-10 As shown, the capture section 212 is provided with an arcuate surface 2121 on one side facing the central axis of the sheath tube 1, and the arcuate surface 2121 is evenly distributed with a number of protrusions 2122, which are specifically barbs pointing into the sheath tube 1. When the jaws 21 rotate and close, the protrusions 2122 squeeze the outer wall of the tendon stump and push the tendon stump into the sheath tube 1. The protrusions 2122 and the arcuate surface 2121 have different areas, and the depths to which they sink into the outer wall of the tendon stump when the jaws 21 squeeze the tendon stump are also different. Therefore, the protrusions 2122 and the arcuate surface 2121 exert different pressures on the outer wall of the tendon stump, thereby forming multiple squeezing areas with different pressures on the surface of the tendon stump when squeezing the tendon stump. Therefore, the force relationship of the tendon stump when in contact with the jaws 21 is more complicated, making it more difficult for the tendon stump to slip out from the clamping of the jaws 21. When the protrusion 2122 is a barb, the tendon stump moving through the capture area into the sheath 1 will not be hindered, but when the tendon stump tends to break away from the clamping part 2, the tip of the barb will penetrate the outer wall of the tendon stump, thereby achieving a firm connection between the tendon stump and the clamping part 2.

[0033] In some embodiments of the present application, Figure 1-10As shown, the execution end 11 is also surrounded by a number of positioning light beads 111. When the sheath tube 1 moves within the tendon sheath, the positioning light beads 111 face the inner wall of the tendon sheath, and the light beams released by the positioning light beads 111 form several light paths between the tendon sheath and the skin surface. Even if the sheath tube 1 rotates circumferentially within the patient's tendon sheath, the multiple positioning light beads 111 arranged around the outer wall of the sheath tube 1 can ensure the existence of the light path. Medical staff can determine the specific position of the execution end 11 under the patient's epidermis through the light path, which helps to calibrate the extension direction of the tendon sheath and facilitate medical staff to record the patient's tendon rupture in detail based on the position of the light path and the field of view obtained by the endoscope 3.

[0034] In some embodiments of the present application, Figure 1-10 As shown, a boss 213 is further provided between the capturing section 212 and the connecting section 211. When the jaws 21 move to the clamping position, the bosses 213 of adjacent jaws 21 approach each other; when the capturing section 212 squeezes the tendon stump, the tendon stump is pushed between the bosses 213, so that the tendon stump is squeezed by both the capturing section 212 and the boss 213 at the same time.

[0035] In some embodiments of the present application, Figure 1-10 As shown, an elastic flap 13 is provided around the sheath 1. When the endoscope 3 is inserted into the sheath 1, the inner wall of the elastic flap 13 presses against the outer wall of the endoscope 3, and the elastic flap 13 maintains the endoscope 3 in a coaxial position with the sheath 1. The elastic flap 13, which is tightly wrapped around the endoscope 3, divides the space within the sheath 1 into a front section 14 and a rear section 15, and the front section 14 and the rear section 15 are not connected to each other. A normal tendon sheath usually only contains secretions from the tendon and synovial layer. However, the tendon sheath of patients with tenosynovitis, especially those with tendon rupture, may also contain blood, inflammatory exudate, cellulose deposits, or hyperplastic tissue. When the tendon sheath is connected to the outside world through the sheath 1, the contents of the tendon sheath that move to the outside world through the sheath 1 can easily cause cross-infection. By providing the elastic flap 13, the two ends of the sheath 1 can be separated when the endoscope 3 is wrapped to prevent cross-infection. At the same time, the elastic flap 13 can maintain the relative position of the endoscope 3 within the sheath 1 and the sheath 1, and can maintain a stable field of view.

[0036] In some embodiments of the present application, Figure 1-10 As shown, the sheath 1 also includes an operating end 16, and a delivery tube 10 is axially arranged inside the sheath 1. One end of the delivery tube 10 is connected to the balloon 12, and the other end of the delivery tube 10 extends outward through the operating end 16 and is connected to the negative pressure device; part of the endoscope 3 is sleeved on the sheath 1, and the remaining part of the endoscope 3 extends outward through the operating end 16 and is connected to the imaging system.

[0037] In some embodiments of the present application, Figure 1-10As shown, a suction tube 17 is provided in the sheath 1, one end of the suction tube 17 is located in the front section 14 of the sheath 1, and the other end of the suction tube 17 passes through the elastic flap 13 and the rear section 15 and extends outward through the operating end 16; when the suction tube 17 is connected to the negative pressure device, negative pressure is formed in the front section 14 of the sheath 1 and the contents that block the field of view of the endoscope 3 are sucked.

[0038] In some embodiments of the present application, Figure 1-10 As shown, an infusion tube 18 is provided in the sheath 1, one end of the infusion tube 18 is located in the front section 14 in the sheath 1, and the other end of the infusion tube 18 passes through the elastic flap 13 and the rear section 15 and extends outward through the operating end 16; the fluid entering the front section 14 through the infusion tube 18 cleans the front section 14 and can be separated from the sheath 1 through the suction tube 17.

Claims

1. A tendon retractor, characterized in that: include, A sheath tube, comprising an execution end portion surrounded by a balloon, wherein the balloon portion is located inside the sheath tube; The clamping portion includes a plurality of jaws, which are rotatably connected to the inner wall of the sheath and partially extend outside the sheath, and the jaws are distributed in a circular array around the central axis of the sheath; the jaws are connected to the balloon, and when the balloon contracts, the jaws are maintained in an initial position, and when the balloon expands, the jaws are driven to rotate along the radial direction of the sheath to a clamping position, and the jaws rotated to the clamping position are tightly abutted against adjacent jaws. When the jaws pass over the tendon stump, the portion of the balloon inside the tendon sheath presses the jaws inward to rotate and close them, while the portion of the balloon outside the sheath can flexibly expand the tendon sheath outward; The endoscope is sleeved on the sheath. When the clamp is in the initial position, the endoscope obtains the field of view of the execution end away from the sheath. When the clamp moves from the initial position to the clamping position, the field of view of the endoscope gradually decreases.

2. A tendon retractor according to claim 1, characterized in that: The clamp includes a connecting section located inside the sheath and a capturing section located outside the sheath. The connecting section is rotatably connected to the inner wall of the sheath, and the end of the capturing section facing away from the sheath has an arc extending radially outward along the sheath. When the clamp is in the initial position, a capturing area is formed between the capturing sections of the multiple clamps, and the maximum outer diameter of the capturing area is not less than the outer diameter of the sheath.

3. A tendon retractor according to claim 2, characterized in that: The capture section is provided with an arcuate surface on one side facing the central axis of the sheath tube, and the arcuate surface is evenly distributed with a plurality of protrusions. When the clamping jaws rotate and close, the protrusions squeeze the outer wall of the tendon stump and push the tendon stump into the sheath tube.

4. A tendon retractor according to claim 1, characterized in that: The execution end is also surrounded by a plurality of positioning lamp beads. When the sheath moves in the tendon sheath, the positioning lamp beads face the inner wall of the tendon sheath, and the light beams released by the positioning lamp beads form several light paths between the tendon sheath and the skin surface.

5. A tendon retractor according to claim 2, characterized in that: A boss is also provided between the capture section and the connecting section. When the jaws move to the clamping position, the bosses of adjacent jaws approach each other; when the capture section squeezes the tendon end, the tendon end is pushed between the bosses, so that the tendon end is squeezed by the capture section and the boss at the same time.

6. A tendon retractor according to claim 1, characterized in that: An elastic flap is arranged around the inside of the sheath tube. When the endoscope is inserted into the sheath tube, the inner wall of the elastic flap is pressed against the outer wall of the endoscope, and the elastic flap maintains the endoscope in a coaxial position with the sheath tube. The elastic flap that is tightly wrapped around the endoscope divides the space inside the sheath tube into a front section and a rear section, and the front section and the rear section are not connected to each other.

7. A tendon retractor according to claim 6, characterized in that: The sheath also includes an operating end, and a delivery tube is axially arranged inside the sheath, one end of the delivery tube is connected to the balloon, and the other end of the delivery tube extends outward through the operating end and is connected to a negative pressure device; the endoscope part is sleeved on the sheath, and the remaining part of the endoscope extends outward through the operating end and is connected to the imaging system.

8. A tendon retractor according to claim 7, characterized in that: A suction tube is provided in the sheath, one end of the suction tube is located in the front section of the sheath, and the other end of the suction tube passes through the elastic flap and the rear section and extends outward through the operating end; when the suction tube is connected to the negative pressure device, negative pressure is formed in the front section of the sheath and the contents that block the field of view of the endoscope are sucked out.

9. A tendon retractor according to claim 8, characterized in that: An infusion tube is provided in the sheath, one end of the infusion tube is located in the front section of the sheath, and the other end of the infusion tube passes through the elastic flap and the rear section and extends outward through the operating end; the fluid entering the front section through the infusion tube cleans the front section and can be separated from the sheath through the suction tube.

10. The tendon retractor according to claim 1, characterized in that: The inner wall of the sheath tube is provided with an axial hole, and the clamping jaw is provided with a connecting shaft, and the connecting shaft is rotatably sleeved on the axial hole.

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