Minimally invasive thread placing device for rotator cuff bone penetrating suture

Abstract

The utility model relates to the technical field of rotator cuff injury repair, and particularly discloses a minimally invasive thread placing device for rotator cuff bone penetrating suture. The minimally invasive wire placement device comprises a frame body assembly, a middle tube, an inner tube, an elastic piece, a gear assembly, a handle and a core tube. The handle is fixed to the core tube. The other end of the core tube is used for being connected with a hollow bone penetrating line placing nail. The inner tube wraps the core tube. The middle pipe wraps the inner pipe. And the middle pipe is movably mounted on the frame body assembly. The inner tube has a first projection. The middle pipe is provided with a second protruding part. The elastic piece is installed between the first protruding part and the second protruding part. And the inner tube is provided with an elastic clamping part used for clamping the hollow bone penetrating line placing nail. The gear assembly is located in the clamping groove of the handle. When the gear assembly does not push the first protruding part, the middle pipe abuts against the elastic clamping part, and the elastic clamping part is folded inwards. The hollow bone-penetrating and thread-placing nail is screwed into a punched bone tunnel by suspending the handle, thread-placing operation is carried out by penetrating through the core tube and the hollow bone-penetrating and thread-placing nail, the suture and the bone tunnel do not interfere with each other, and thread-placing is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of rotator cuff injury repair, and more specifically to a minimally invasive suture placement device for rotator cuff transosseous suturing. Background Art

[0002] The rotator cuff is the collective name for the tendon tissue covering the front, top, and back of the shoulder joint. Rotator cuff injuries are common in young, middle-aged, and elderly people, and can severely affect shoulder joint function.

[0003] For mild rotator cuff injuries, conservative treatment can be chosen to allow the injured tendon to get sufficient rest, avoid pushing movements, and replace them with stretching activities. Local treatment can use topical medications such as plasters.

[0004] If the rotator cuff injury is severe or completely torn, surgery is required. Currently, surgical treatment for rotator cuff injuries often uses wire anchors, which carry risks such as anchor pullout and failure. Some transosseous suturing methods, while not using wire anchors, can be difficult to place. Utility Model Content

[0005] Considering that the current surgical treatment of rotator cuff injuries often uses wire anchors, there are risks such as anchor pullout and failure, and some transbone suturing methods, although not using wire anchors, have difficulties in suture placement, the utility model proposes a minimally invasive suture placement device for transbone suturing of the rotator cuff.

[0006] A minimally invasive suture placement device for rotator cuff transosseous suturing comprises a frame component, a middle tube, an inner tube, an elastic member, a shift component, a handle and a core tube.

[0007] The handle is fixed to one end of the core tube. The other end of the core tube has a side convex portion, and the side convex portion is used to connect the hollow bone-penetrating wire nail and drive the hollow bone-penetrating wire nail to rotate.

[0008] The inner tube wraps the section of the core tube away from the handle. The middle tube wraps the inner tube. The middle tube is movably mounted on the frame assembly.

[0009] One end of the inner tube has a first protrusion. One end of the middle tube has a second protrusion. The elastic member is mounted between the first and second protrusions. The other end of the inner tube has an elastic clamping portion for clamping the hollow transosseous suture. The maximum diameter of the elastic clamping portion in its naturally extended state is greater than the inner diameter of the middle tube.

[0010] The handle is provided with a plurality of mutually connected positioning grooves along the axial direction. One end of the shift assembly is located in the plurality of mutually connected positioning grooves, and the other end faces the first protrusion.

[0011] When the shift assembly does not push the first protrusion, the rebound force of the elastic member pushes the other end of the middle tube against the elastic clamping portion, so that the elastic clamping portion is retracted inward.

[0012] By adopting the above technical solution, in a natural state, the elastic member pushes the first protrusion and the second protrusion toward both ends, that is, the middle tube and the inner tube have a tendency to move in opposite directions, so that the elastic clamping part presses against the tube opening at one end of the middle tube, so that the elastic clamping part has a tendency to retract inward. The core tube has a lateral convex part, which is used to connect the hollow bone-penetrating suture nail and drive the hollow bone-penetrating suture nail to rotate. The end of the core tube with the lateral convex part can be inserted into the hollow bone-penetrating suture nail, and the hollow bone-penetrating suture nail is clamped by the elastic clamping part, so that the hollow bone-penetrating suture nail is fixed. The hollow bone-penetrating suture nail can be screwed into the drilled bone tunnel by hanging the handle. The suture operation is performed through the core tube and the hollow bone-penetrating suture nail, and the suture and the bone tunnel do not interfere, making suture placement easy.

[0013] During the process of screwing the hollow bone-penetrating suture nail into the bone tunnel, the handle and the core tube move relative to the frame assembly toward the bone tunnel, driving the shift assembly forward. The shift assembly pushes the first protrusion, causing the elastic member to be further compressed and the inner tube to move forward, so that the elastic clamping portion moves forward and is free from the top pressure of the middle tube, and the elastic clamping portion can be easily unfolded. After using a tool to pass the suture through the core tube and the hollow bone-penetrating suture nail into the bone tunnel and fix it, maintain the push on the handle to press the core tube on the hollow bone-penetrating suture nail, adjust the shift assembly backward, and the elastic clamping portion can be unfolded and detached from the hollow bone-penetrating suture nail. Then, pull the handle backward to detach the core tube from the hollow bone-penetrating suture nail. Using this device does not require the use of anchor nails for threading, and the bone tunnel of the rotator cuff can be easily sutured. The suture placement is safe and reliable.

[0014] As an improvement to the minimally invasive suture device for rotator cuff transosseous suture, the minimally invasive suture device further includes a hollow transosseous suture nail. The lateral protrusion can be adapted to be inserted into the hollow transosseous suture nail, and the rotation of the core tube can drive the rotation of the hollow transosseous suture nail. When one end of the shift assembly is located in one of the positioning slots, the shift assembly does not contact or just contacts the first protrusion, the elastic clamping portion clamps the hollow transosseous suture nail, and the shift assembly can also move away from the hollow transosseous suture nail to another positioning slot.

[0015] By adopting the above technical solution, a locking groove is provided on the handle. When one end of the shift assembly is located in the locking groove, the shift assembly does not push the first protrusion, and the elastic clamping portion can clamp the hollow bone-penetrating wire nail, so that the hollow bone-penetrating wire nail can be conveniently and accurately driven to align with the bone tunnel opening.

[0016] As an improvement of the minimally invasive wire threading device for rotator cuff transosseous suture, the hollow transosseous wire threading nail has a hemispherical nail head and a shank with external threads, and the shank is connected to the nail head. Both the shank and the nail head have open hollow cavities, and the two hollow cavities communicate with each other. A side concave portion is formed on the inner wall of the hollow cavity of the nail head. The core tube is inserted into the hollow cavity of the nail head, and the side convex portion is fitted and clamped with the side concave portion. When the elastic clamping portion clamps the hollow transosseous wire threading nail, the elastic clamping portion semi-wraps the nail head, and the elastic clamping portion faces the side convex portion inward.

[0017] By adopting the above technical solution, the side convex portion is fitted and clamped with the side concave portion, so that the rotation of the core tube can drive the rotation of the hollow transosseous wire threading nail. The semi-wrapping clamping structure, combined with the action of the middle tube pressing the elastic clamping portion, enables the elastic clamping portion to have a strong clamping force on the nail head and can conveniently disassemble the clamping structure.

[0018] As an improvement of the minimally invasive wire threading device for rotator cuff transosseous suture, the frame assembly includes a bracket, a suture hook rod and an outer tube. Both the suture hook rod and the outer tube are fixed on the bracket. The suture hook rod is arranged on the side away from the handle. The suture hook rod is provided with a perforation, and the suture hook rod is further provided with a convex block for hanging a suture around the perforation. The middle tube is movably installed in the outer tube and can make the second protruding portion abut against one end of the outer tube during the movement process.

[0019] By adopting the above technical solution, the middle tube can move axially along the outer tube and abut against one end of the outer tube with the second protruding portion, which is convenient for moving the inner tube and the core tube, thereby facilitating the installation, disassembly and positioning of the hollow transosseous wire threading nail.

[0020] As an improvement of the minimally invasive wire threading device for rotator cuff transosseous suture, the core tube has a through and smooth first straight cavity. The hollow transosseous wire threading nail has a through and smooth second straight cavity. The first straight cavity and the second straight cavity communicate to form a straight cavity, and the extension line of the straight cavity passes through the perforation.

[0021] By adopting the above technical solution, the smooth straight cavity facilitates the introduction of the suture, and the extension line of the straight cavity passes through the perforation, so that the introduced suture can enter the perforation and hang on the convex block, so that the suture is hooked and fixed and pulled out from the other direction to complete the wire threading operation.

[0022] As an improvement to the minimally invasive suture placement device for rotator cuff transosseous suturing, the section of the inner tube adjacent to the elastic clamping portion is a constricted tube section with a smaller diameter than the section distal to the elastic clamping portion. The constricted tube section is provided with multiple strip-shaped through-slits parallel to the tube body, thereby dividing the section adjacent to the elastic clamping portion into multiple curved strips. The elastic clamping portion includes multiple inwardly half-wrapped curved flaps. Each curved strip is connected to one of the curved flaps.

[0023] By adopting the above technical solution, the elastic clamping part can be more easily retracted. When clamping the hollow bone-penetrating wire nail, the elastic clamping part can be squeezed by the middle tube to generate a larger clamping force. When the hollow bone-penetrating wire nail is not clamped, it is also convenient for the elastic clamping part to be retracted and enter the middle tube and pulled out from the other end, making it convenient to remove the inner tube from the middle tube.

[0024] As an improvement to the minimally invasive suture placement device for rotator cuff transosseous suturing, the minimally invasive suture placement device further includes a collar. One end of the collar is fixedly connected to the second protrusion via a thread. The other end of the collar has an opening with a larger diameter than the core tube. The other end of the shift assembly passes through the opening and abuts the first protrusion.

[0025] By adopting the above technical solution, the ring sleeve protects the elastic member, and one end of the ring sleeve is fixedly connected to the second protruding portion by a thread, which is convenient for disassembly.

[0026] As an improvement to the minimally invasive suture placement device for rotator cuff transosseous suturing, the mutually fixed ring sleeve and the second protrusion enclose a limiting inner cavity. The first protrusion and the elastic member move back and forth in the limiting inner cavity. The length of the limiting inner cavity is set so that when the other end of the middle tube presses against the elastic clamping portion, the first protrusion does not abut or just abuts the end wall of the limiting inner cavity away from the second protrusion.

[0027] By adopting the above technical solution, the middle tube can be effectively pressed against the elastic clamping part, with a strong extrusion force, which can effectively maintain the clamping force of the elastic clamping part.

[0028] As an improvement to the minimally invasive suture placement device for rotator cuff transosseous suturing, the shift assembly includes a push tube and a shift member. The push tube wraps around the tube section of the core tube adjacent to the handle. The front end of the push tube is inserted into the annular sleeve and faces the first protrusion. The lower end of the shift member is fixed to or sleeved on the rear end of the push tube and is configured to push the push tube forward. A positioning groove extends from the upper end of the shift member.

[0029] By adopting the above technical solutions, whether the shifting member and the push tube are fixed or sleeved, the movement of the shifting member in multiple clamping grooves can, with the cooperation of the elastic member, make the push tube move forward or backward, maintaining its operating mechanism of driving the first convex portion forward or backward in cooperation with the elastic member.

[0030] It should be noted that the above solutions are one or several states of the minimally invasive wire placing device of the present invention, and other states of the minimally invasive wire placing device of the present invention should also fall within the protection scope of the present invention.

[0031] In summary, the minimally invasive wire placing device for rotator cuff transosseous suture of the present invention has the following beneficial effects:

[0032] In the surgery for rotator cuff injury, this solution can achieve the minimally invasive placement of the hollow transosseous wire placing nail, and accurately position it. Sutures for fixing the rotator cuff tendon are arranged in the hollow transosseous wire placing nail, and the risk of the suture cutting the bone tunnel is reduced through the hollow transosseous wire placing nail, which is beneficial to the tendon-bone healing of the rotator cuff. The minimally invasive wire placing device and the wire placing method for rotator cuff transosseous suture of the present invention can also be applied in minimally invasive arthroscopic surgeries, facilitating the operation of doctors and improving the quality and efficiency of surgeries. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is the front view of a minimally invasive wire placing device for rotator cuff transosseous suture.

[0034] Figure 2 It is Figure 1 the exploded view of the minimally invasive wire placing device.

[0035] Figure 3 It is Figure 1 the sectional view of the minimally invasive wire placing device.

[0036] Figure 4 It is Figure 3 the enlarged view of area A of

[0037] Figure 5 It is Figure 3 the enlarged view of area B of

[0038] Figure 6 It is Figure 1 the top view of the minimally invasive wire placing device.

[0039] Figure 7 It is Figure 2 another perspective view of the exploded view.

[0040] Figure 8 It is the schematic diagram of the minimally invasive wire placing device for transosseous wire placing.

[0041] Figure 9 It is the three-dimensional view of the hollow transosseous wire placing nail.

[0042] Figure 10 For Figure 1 The perspective view of the minimally invasive wire - placing device

[0043] Figure 11 For Figure 2 The enlarged view of the inner tube in the exploded view

[0044] Reference numerals: frame assembly 1, middle tube 2, inner tube 3, elastic member 4, position - limiting assembly 5, handle 6, core tube 7, side convex portion 701, hollow bone - piercing wire - placing nail 8, first protruding portion 301, second protruding portion 201, elastic clamping portion 302, clamping groove 601, bone tunnel t, nail cap 801, rod body 802, side concave portion 8011, bracket 11, wire - hooking rod 12, outer tube 13, perforation 121, convex block 122, first straight cavity 702, second straight cavity 803, inner - shrinking tube section 303, arc - shaped strip 3031, arc - shaped flap 3021, ring sleeve 9, push tube 51, shifting member 52 Detailed implementation manners

[0045] As shown in Figure 1 and Figure 2 , a minimally invasive wire - placing device for rotator cuff bone - piercing suture includes a frame assembly 1, a middle tube 2, an inner tube 3, an elastic member 4, a position - limiting assembly 5, a handle 6 and a core tube 7

[0046] As shown in Figure 3 , the handle 6 is fixed at one end of the core tube 7. As shown in Figure 2 , the other end of the core tube 7 has a side convex portion 701, such as a six - petal plum blossom pattern, and the side convex portion 701 is used to connect the hollow bone - piercing wire - placing nail 8 and drive the hollow bone - piercing wire - placing nail 8 to rotate

[0047] Combined with Figure 4 and Figure 5 , the inner tube 3 wraps the tube section of the core tube 7 away from the handle 6. The middle tube 2 wraps the inner tube 3. The middle tube 2 is movably installed on the frame assembly 1

[0048] One end of the inner tube 3 has a first protruding portion 301, such as a protruding ring. One end of the middle tube 2 has a second protruding portion 201, such as a protruding ring

[0049] As shown in Figure 4 , the elastic member 4 can be a spring, installed between the first protruding portion 301 and the second protruding portion 201, and is used to generate an elastic force so that the first protruding portion 301 and the second protruding portion 201 have a tendency to move in opposite directions

[0050] The other end of the inner tube 3 has an elastic clamping portion 302 for holding the hollow transosseous suture 8. This portion can be a petal-shaped spring, for example, four equally spaced petals forming a semi-spherical shape. When naturally extended, the maximum diameter of the elastic clamping portion 302 is larger than the inner diameter of the middle tube 2 to prevent it from easily detaching from the middle tube 2. However, the elastic clamping portion 302 should have a low elastic force to facilitate retraction into the middle tube 2 and removal from the other end to separate the middle tube 2 and the inner tube 3.

[0051] refer to Figure 6 The handle 6 is provided with a plurality of mutually connected positioning grooves 601 along the axial direction, preferably two positioning grooves 601. One end of the shift assembly 5 is located in the plurality of mutually connected positioning grooves 601, referring to Figure 4 , the other end of the shift assembly 5 faces the first protrusion 301 .

[0052] When the shift assembly 5 does not push the first protrusion 301 , the rebound force of the elastic member 4 pushes the other end of the middle tube 2 against the elastic clamping portion 302 , causing the elastic clamping portion 302 to retract inward, thereby applying a larger clamping force to clamp the hollow bone-penetrating suture nail 8 .

[0053] In the above minimally invasive suture device for rotator cuff transosseous suture, in a natural state, the elastic member 4 pushes the first protrusion 301 and the second protrusion 201 toward both ends, so that the middle tube 2 and the inner tube 3 tend to move in opposite directions, so that the elastic clamping portion 302 presses against one end of the middle tube 2, so that the elastic clamping portion 302 tends to retract inward.

[0054] refer to Figure 7 The core tube 7 has a side convex portion 701, which is used to connect the hollow bone-penetrating wire nail 8 and drive the hollow bone-penetrating wire nail 8 to rotate. The end of the core tube 7 with the side convex portion 701 can be inserted into the hollow bone-penetrating wire nail 8, and the elastic clamping portion 302 can be used to clamp the hollow bone-penetrating wire nail 8, so that the hollow bone-penetrating wire nail 8 is fixed.

[0055] refer to Figure 8 The hollow bone-penetrating suture nail 8 can be screwed into the bone tunnel t by hanging the handle 6, and the suture placement operation is performed through the core tube 7 and the hollow bone-penetrating suture nail 8. The suture and the bone tunnel t do not interfere with each other, and the suture placement is easy.

[0056] During the process of screwing the hollow bone-piercing wire nail 8 into the bone tunnel t, the handle 6 and the core tube 7 move relative to the frame assembly 1 towards the bone tunnel t, driving the position-limiting assembly 5 to move forward. The position-limiting assembly 5 presses against the first protruding portion 301, causing the elastic member 4 to be further compressed and the inner tube 3 to move forward. That is, the elastic clamping portion 302 moves forward and disengages from the pressing of the middle tube 2, and the elastic clamping portion 302 can be easily unfolded. After using a tool to pass the suture through the core tube 7 and the hollow bone-piercing wire nail 8 and fix it in the bone tunnel t, keep the thrust on the handle 6 so that the core tube 7 is pressed against the hollow bone-piercing wire nail 8. Adjust the position-limiting assembly 5 backward, then the elastic clamping portion 302 can be unfolded and disengaged from the hollow bone-piercing wire nail 8. Then pull the handle 6 backward to make the core tube 7 disengage from the hollow bone-piercing wire nail 8. Using this device does not require the use of an anchor nail for threading, and can easily thread the bone tunnel t made for the rotator cuff, and the threading is safe and reliable.

[0057] This minimally invasive wire threading device may include the hollow bone-piercing wire nail 8, or may not include the hollow bone-piercing wire nail 8. When not including it, a suitable hollow bone-piercing wire nail 8 can be used in cooperation. One end of the core tube 7 with the side convex portion 701 can be adaptively inserted into the hollow bone-piercing wire nail 8, and the rotation of the core tube 7 can drive the rotation of the hollow bone-piercing wire nail 8. When one end of the position-limiting assembly 5 is located in one of the clamping slots 601, for example, the clamping slot 601 at the front end (closest to the hollow bone-piercing wire nail 8), the position-limiting assembly 5 does not contact or just contacts the first protruding portion 301, and the elastic clamping portion 302 clamps the hollow bone-piercing wire nail 8, which can conveniently and accurately drive the hollow bone-piercing wire nail 8 to align with the mouth of the bone tunnel t. Based on the above-mentioned one clamping slot 601, the position-limiting assembly 5 can also move in the direction away from the hollow bone-piercing wire nail 8 to another clamping slot 601, that is, there is another clamping slot 601 after the above-mentioned one clamping slot 601, so as to facilitate the action of pulling out the inner tube 3 after compressing the elastic member 4, which is completed by retracting the position-limiting assembly 5.

[0058] Reference Figure 9, An alternative structure of the hollow bone-piercing wire-implanting nail 8 is that the hollow bone-piercing wire-implanting nail 8 has a hemispherical nail head 801 and a shank 802 with external threads. The shank 802 is connected to the nail head. Both the shank 802 and the nail head have open hollow cavities, and the two hollow cavities communicate. A side recess 8011 is provided on the inner wall of the hollow cavity of the nail head 801, for example, a six-petal plum blossom-shaped side recessed pattern. The core tube 7 is inserted into the hollow cavity of the nail head 801, and the side convex portion 701 of the core tube 7 is adaptively clamped to the side recess 8011 of the hollow bone-piercing wire-implanting nail 8, so that the rotation of the core tube 7 can drive the rotation of the hollow bone-piercing wire-implanting nail 8. When the elastic clamping portion 302 clamps the hollow bone-piercing wire-implanting nail 8, the elastic clamping portion 302 semi-wraps the nail head 801, and the elastic clamping portion 302 faces the side convex portion 701 inward. The semi-wrapping clamping structure, combined with the function of the middle tube 2 pressing the elastic clamping portion 302, enables the elastic clamping portion 302 to have a strong clamping force on the nail head 801 and can be easily disassembled.

[0059] As Figure 7 , An alternative structure of the frame assembly 1 is that the frame assembly 1 includes a bracket 11, a wire-hooking rod 12, and an outer tube 13. Both the wire-hooking rod 12 and the outer tube 13 are fixed on the bracket 11. The wire-hooking rod 12 is arranged on the side away from the handle 6. The wire-hooking rod 12 is provided with a perforation 121, and the wire-hooking rod 12 is further provided with a convex block 122 for hanging the suture around the perforation 121, forming a hook for hanging the suture. The middle tube 2 is movably installed in the outer tube 13 and can make the second protruding portion 201 abut against one end of the outer tube 13 during the movement process, so as to facilitate the movement and positioning of the inner tube 3 and the core tube 7, thus facilitating the installation, disassembly, and positioning of the hollow bone-piercing wire-implanting nail 8.

[0060] Reference Figure 3 , The core tube 7 has a through and smooth first straight cavity 702. The hollow bone-piercing wire-implanting nail 8 has a through and smooth second straight cavity 803. The first straight cavity 702 and the second straight cavity 803 communicate to form a straight cavity, and the extension line of the straight cavity passes through the perforation 121. Reference Figure 10 , The smooth straight cavity facilitates the introduction of the suture, and the extension line of the straight cavity passes through the perforation 121, so that the introduced suture can enter the perforation 121 and hang on the convex block 122, so that the suture is hooked and fixed and pulled out from the other direction, completing the wire-implanting operation.

[0061] As Figure 11, An optional structure of the inner tube 3 is that a section of the inner tube 3 adjacent to the elastic clamping part 302 is a reduced-diameter tube section 303 with a diameter smaller than that of the section of the tube away from the elastic clamping part 302. The reduced-diameter tube section 303 is provided with a plurality of strip-shaped through slits parallel to the tube body, so that a section of the reduced-diameter tube section 303 adjacent to the elastic clamping part 302 is divided into a plurality of arc-shaped plates 3031. The elastic clamping part 302 includes a plurality of inwardly semi-wrapping arc-shaped flaps 3021, and each arc-shaped plate 3031 is connected to an arc-shaped flap 3021, so that the elastic clamping part 302 can be more easily closed. When clamping the hollow bone-piercing wire nail 8, the elastic clamping part 302 can be squeezed by the middle tube 2 to generate a greater clamping force. When the hollow bone-piercing wire nail 8 is not clamped, it is also convenient for the elastic clamping part 302 to close and enter the middle tube 2 and be pulled out from the other end, facilitating the removal of the inner tube 3 from the middle tube 2.

[0062] As Figure 4 , the minimally invasive wire placement device may further include a collar 9. One end of the collar 9 is fixedly connected to the second protrusion 201 by a thread. For example, the collar 9 has an internal thread, and the second protrusion 201 is in a side T-ring shape with an external thread on the side T-ring, and the internal thread and the external thread are adaptively connected. The other end of the collar 9 has an opening with a diameter larger than that of the core tube 7. The other end of the gear position component 5 passes through the opening and abuts against the first protrusion 301. The collar 9 protects the elastic member 4. One end of the collar 9 is fixedly connected to the second protrusion 201 by a thread, which is convenient for disassembly.

[0063] The mutually fixed collar 9 and the second protrusion 201 enclose a limiting inner cavity. The first protrusion 301 and the elastic member 4 move back and forth in the limiting inner cavity. The length of the limiting inner cavity is set such that when the other end of the middle tube 2 abuts against the elastic clamping part 302, the first protrusion 301 does not abut or just abuts against the end wall of the limiting inner cavity away from the second protrusion 201, so that the middle tube 2 at the other end can effectively abut against the elastic clamping part 302, with a strong extrusion force and an effective maintenance of the clamping force of the elastic clamping part 302.

[0064] As Figure 3 , the gear position component 5 may include a push tube 51 and a shifting member 52. The push tube 51 wraps the tube section of the core tube 7 adjacent to the handle 6. The front end of the push tube 51 is inserted into the collar 9 and faces the first protrusion 301. The lower end of the shifting member 52 is fixed or sleeved on the tail end of the push tube 51 and is configured to be able to push the push tube 51 forward. The upper end of the shifting member 52 extends out of a clamping groove 601. Whether the shifting member 52 and the push tube 51 are fixed or sleeved, the movement of the shifting member 52 in a plurality of clamping grooves 601 can, with the cooperation of the elastic member 4, make the push tube 51 move forward or backward, maintaining its operating mechanism of driving the first protrusion 301 to move forward or backward in cooperation with the elastic member 4.

[0065] Use the above-mentioned minimally invasive wire placement device to place wires, and perform a minimally invasive wire placement method for rotator cuff transosseous suture. The minimally invasive wire placement method includes the following steps:

[0066] (1) Manually adjust the gear component 5 to a clamping groove 601 relatively close to the hollow bone-piercing wire nail 8.

[0067] (2) Fix the second protrusion 201, push the handle 6 in the direction close to the wire-hooking rod 12, drive the core tube 7 and the gear component 5 to move synchronously, the elastic member 4 is compressed, and simultaneously push the inner tube 3 to move in the direction close to the wire-hooking rod 12.

[0068] (3) Fit and install one end of the hollow bone-piercing wire nail 8 at the front end of the core tube 7, and one end of the hollow bone-piercing wire nail 8 is also clamped by the elastic clamping portion 302 of the inner tube 3.

[0069] (4) Release the pushing action on the handle 6, the handle 6 is reset by the driving of the elastic member 4, the elastic clamping portion 302 retracts and is clamped by the middle tube 2 to clamp the hollow bone-piercing wire nail 8.

[0070] (5) For the first bone tunnel t and the second bone tunnel t that have been drilled, the first bone tunnel t and the second bone tunnel t are communicated. Insert the wire-hooking rod 12 into the first bone tunnel t, push the middle tube 2 to move along the outer tube 13, so that the hollow bone-piercing wire nail 8 is aligned with the second bone tunnel t, and rotate the handle 6 to screw the hollow bone-piercing wire nail 8 into the second bone tunnel t.

[0071] (6) Refer to Figure 8 , use a fork wrench to hook the double suture and hang the suture on the protrusion 122 of the wire-hooking rod 12 along the first straight cavity 702 and the second straight cavity 803. Keep the core tube 7 against the hollow bone-piercing wire nail 8, withdraw the fork wrench, manually adjust the gear component 5 to a clamping groove 601 relatively far from the hollow bone-piercing wire nail 8, the elastic member 4 rebounds, so that the inner tube 3 moves backward, the elastic clamping portion 302 disengages from the hollow bone-piercing wire nail 8, and then pull the handle 6 backward to disengage the core tube 7 from the hollow bone-piercing wire nail 8.

[0072] (7) Pull the bracket 11 to pull out the wire-hooking rod 12 with the suture from the first bone tunnel t to complete the wire placement action.

[0073] In the rotator cuff transosseous suture, after the bone tunnel t is drilled, for example, an oblique bone tunnel t and a transverse bone tunnel t intersect and communicate with each other. Using the above-mentioned minimally invasive wire placement device to place the wire can conveniently and effectively complete the minimally invasive wire placement. During the process of pulling out the inner tube 3, the core tube 7 is always pressed against the hollow bone-piercing wire nail 8. First, the elastic clamping part 302 of the inner tube 3 is separated from the hollow bone-piercing wire nail 8, and then the core tube 7 is separated from the hollow bone-piercing wire nail 8, so that the elastic clamping part 302 basically does not pull the hollow bone-piercing wire nail 8 outward and reduce the firmness of the hollow bone-piercing wire nail 8 in the bone tunnel t. The hollow bone-piercing wire nail 8 enables the suture to not scrape the bone tunnel t during the process of introducing the suture, making the suture not easily break and improving the reliability.

[0074] In the surgery for rotator cuff injury, this solution can achieve the minimally invasive placement of the hollow bone-piercing wire nail 8 and accurate positioning. A suture for fixing the rotator cuff tendon is arranged in the hollow bone-piercing wire nail 8, and the risk of the suture cutting the bone tunnel t is reduced through the hollow bone-piercing wire nail 8, which is beneficial to the healing of the rotator cuff tendon and bone. The minimally invasive wire placement device and method for rotator cuff transosseous suture of the present utility model can also be applied in minimally invasive arthroscopic surgery, facilitating the operation of doctors and improving the quality and efficiency of the surgery.

[0075] The above are only some embodiments of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. For those of ordinary skill in the art of this technology, several improvements and refinements made without departing from the creative design of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A minimally invasive wire placement device for rotator cuff transosseous suture, characterized in that, It comprises a frame assembly (1), a middle tube (2), an inner tube (3), an elastic member (4), a shift assembly (5), a handle (6) and a core tube (7); The handle (6) is fixed to one end of the core tube (7); the other end of the core tube (7) has a lateral convex portion (701), and the lateral convex portion (701) is used to connect the hollow bone-penetrating wire nail (8) and drive the hollow bone-penetrating wire nail (8) to rotate; The inner tube (3) wraps the section of the core tube (7) away from the handle (6); the middle tube (2) wraps the inner tube (3); the middle tube (2) is movably mounted on the frame assembly (1); One end of the inner tube (3) has a first protrusion (301); one end of the middle tube (2) has a second protrusion (201); the elastic member (4) is installed between the first protrusion (301) and the second protrusion (201); the other end of the inner tube (3) has an elastic clamping portion (302) for clamping the hollow bone-penetrating suture nail (8); the maximum diameter of the elastic clamping portion (302) in a naturally stretched state is greater than the inner diameter of the middle tube (2); The handle (6) is provided with a plurality of mutually connected positioning grooves (601) along the axial direction; one end of the shift assembly (5) is located in the plurality of mutually connected positioning grooves (601), and the other end faces the first protrusion (301); When the shift assembly (5) does not push the first protrusion (301), the rebound force of the elastic member (4) pushes the other end of the middle tube (2) against the elastic clamping portion (302), causing the elastic clamping portion (302) to retract inward.

2. The minimally invasive wire placement device for rotator cuff transosseous suture according to claim 1, wherein The minimally invasive suture placement device further comprises a hollow bone-penetrating suture placement nail (8); the lateral protrusion (701) can be adapted to be inserted into the hollow bone-penetrating suture placement nail (8), and the rotation of the core tube (7) can drive the hollow bone-penetrating suture placement nail (8) to rotate; When one end of the shift assembly (5) is located in one of the positioning slots (601), the shift assembly (5) does not contact or just contacts the first protrusion (301), the elastic clamping portion (302) clamps the hollow bone-penetrating wire nail (8), and the shift assembly (5) can also move in a direction away from the hollow bone-penetrating wire nail (8) to another positioning slot (601).

3. The minimally invasive wire placement device for rotator cuff transosseous suture according to claim 2, characterized in that, The hollow bone-penetrating suture nail (8) has a hemispherical nail cap (801) and a shaft (802) with an external thread, wherein the shaft (802) is connected to the nail cap; the shaft (802) and the nail cap both have an open hollow cavity, and the two hollow cavities are connected; The inner wall of the hollow cavity of the nail cap (801) is provided with a side recess (8011); the core tube (7) is inserted into the hollow cavity of the nail cap (801), and the side protrusion (701) is adapted to engage with the side recess (8011); When the elastic clamping part (302) clamps the hollow bone-piercing wire nail (8), the elastic clamping part (302) semi-wraps the nail cap (801), and the elastic clamping part (302) faces the convex part (701) inward.

4. The minimally invasive wire placement device for rotator cuff transosseous suture according to claim 2, characterized in that, The frame assembly (1) includes a bracket (11), a wire-hooking rod (12) and an outer tube (13); The wire-hooking rod (12) and the outer tube (13) are both fixed on the bracket (11); the wire-hooking rod (12) is arranged on the side away from the handle (6); the wire-hooking rod (12) is provided with a perforation (121), and the wire-hooking rod (12) is further provided with a bump (122) for hanging a suture around the perforation (121); the middle tube (2) is movably installed in the outer tube (13), and can make the second protruding part (201) abut against one end of the outer tube (13) during the movement process.

5. The minimally invasive wire placement device for rotator cuff transosseous suture according to claim 4, characterized in that, The core tube (7) has a through and smooth first straight cavity (702); the hollow bone-piercing wire nail (8) has a through and smooth second straight cavity (803); the first straight cavity (702) and the second straight cavity (803) communicate to form a straight cavity, and the extension line of the straight cavity passes through the perforation (121).

6. The minimally invasive wire placement device for rotator cuff transosseous suture according to any one of claims 1-5, characterized in that, A section of the inner tube (3) adjacent to the elastic clamping part (302) is a reduced-diameter tube section (303) whose diameter is smaller than that of a section of the tube away from the elastic clamping part (302). The reduced-diameter tube section (303) is provided with a plurality of strip-shaped through slits parallel to the tube body, so that a section of the reduced-diameter tube section (303) adjacent to the elastic clamping part (302) is divided into a plurality of arc-shaped plates (3031); The elastic clamping part (302) includes a plurality of inward semi-wrapping arc-shaped flaps (3021); each arc-shaped plate (3031) is connected to one arc-shaped flap (3021).

7. The minimally invasive wire placement device for rotator cuff transosseous suture according to claim 1, characterized in that, The minimally invasive wire-placement device further includes a collar (9); one end of the collar (9) is fixedly connected to the second protruding part (201) by a thread; the other end of the collar (9) has an opening with a diameter larger than that of the core tube (7); the other end of the blocking component (5) passes through the opening and abuts against the first protruding part (301).

8. The minimally invasive wire placement device for rotator cuff transosseous suture according to claim 7, characterized in that, The mutually fixed collar (9) and the second protruding part (201) enclose a limiting inner cavity; the first protruding part (301) and the elastic member (4) move back and forth in the limiting inner cavity; The length of the limiting inner cavity is set such that when the other end of the middle tube (2) abuts against the elastic clamping part (302), the first protruding part (301) does not abut or just abuts against the end wall of the limiting inner cavity away from the second protruding part (201).

9. The minimally invasive wire placement device for rotator cuff transosseous suture according to claim 7 or 8, characterized in that, The blocking component (5) includes a push tube (51) and a shifting member (52); The push tube (51) wraps the tube section of the core tube (7) adjacent to the handle (6); the front end of the push tube (51) is inserted into the collar (9) and faces the first protruding part (301); The lower end of the shifting member (52) is fixed to or sleeved on the tail end of the push tube (51), and is configured to be able to push the push tube (51) forward; the upper end of the shifting member (52) extends out of one of the clamping slots (601).

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