A gun-type lifting forceps capable of effectively pressurizing the fracture ends

Abstract

The invention discloses a gun-type lifting pliers which can effectively pressurize the fracture ends of a bone, comprising a handle, a gun barrel passing through the handle, a paddle arranged inside the handle, a compression spring arranged between the paddle and the handle, the compression spring sleeved outside the gun barrel, a direction-changing component rotatably connected inside the handle, and when the trigger is pulled, the top of the trigger contacts and squeezes the lower end of the direction-changing component, the upper end of the direction-changing component contacts and squeezes the lower end of the paddle, the trigger drives the paddle to squeeze the compression spring through the direction-changing component, and at the same time the paddle contacts the top and bottom surfaces of the gun barrel and drives the gun barrel to slide backward, the paddle changes from a vertical state to an inclined state after being squeezed, and then the tail end of the intramedullary nail is pulled by the pulling part to pull the distal section of the fracture toward the proximal section, so as to realize the exact pressurization of the fracture ends, and after the pressurization operation is completed, the pressurization effect can be effectively maintained, so that the fracture ends after internal fixation are in close contact, a stable and reliable mechanical conduction environment is provided for fracture healing, fracture healing is promoted, and the occurrence of delayed fracture healing and nonunion complications is effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, and in particular to a gun-type lifting forceps capable of effectively pressurizing a bone fracture end. Background Art

[0002] Intramedullary nailing has been widely used in limb fractures and has achieved good clinical results. However, during the intramedullary nailing process, due to improper operation, the fracture ends cannot be effectively pressurized, resulting in persistent separation, instability, and rotational activity of the fracture ends after internal fixation, which ultimately causes the fracture to fail to heal within the expected time, and even complications such as nonunion and failure of internal fixation.

[0003] At present, in the intramedullary nail internal fixation operation, the operation of pressurizing the fracture ends usually adopts the method of knocking back the tail end of the intramedullary nail. That is, before locking the nail, check whether the fracture ends are separated and displaced. If there is separation, the distal nail should be locked first. After the distal nail is locked, the fracture site is observed under X-ray fluoroscopy, and the fracture ends are pressurized by knocking back the tail end of the intramedullary nail with a sliding hammer, and then the proximal nail is locked to complete the pressurized fixation. The principle is to achieve pressurization through collision and extrusion of the fracture ends. However, at the same time as the collision, the elastic force generated by the collision will cause separation again. And after knocking back, the pressurization effect of the fracture ends cannot be maintained, and the fracture ends are prone to separation again when the proximal nail is locked. Summary of the invention

[0004] The purpose of the present invention is to provide a gun-type pulling forceps which can effectively pressurize the fracture ends in order to achieve the pulling operation and complete the axial pressurization of the fracture ends in the intramedullary nail fixation surgery in order to solve the problems and shortcomings described in the background technology.

[0005] A gun-type lifting pliers capable of effectively pressurizing a fractured bone comprises a handle, a gun rod passing through and axially slidingly installed inside the handle, the gun rod passing through a paddle, the paddle being arranged inside a first accommodating cavity of the handle, a compression spring being arranged between the paddle and the handle, the compression spring being sleeved outside the gun rod, the paddle being located at the front end of the compression spring, a trigger being rotatably installed at the front end of the handle, a direction-changing component being rotatably connected inside the first accommodating cavity of the handle, the direction-changing component abutting against the paddle and the front end of the handle, and when the trigger is pulled, the top of the trigger abuts against and squeezes the lower end of the direction-changing component, and the upper end of the direction-changing component abuts against and squeezes the paddle At the lower end, the trigger drives the paddle to squeeze the compression spring through the direction-changing assembly, and at the same time, the paddle is pressed against the top and bottom surfaces of the gun barrel and drives the gun barrel to slide backward. After being squeezed, the paddle changes from a vertical state at rest to an inclined state, and the gun barrel passes through the clamp, which is connected to the inside of the second accommodating cavity of the handle. The top of the clamp is rotatably connected to the handle, and a reset spring is arranged between the clamp and the handle. The clamp contacts the top and bottom surfaces of the gun barrel to prevent the gun barrel from moving forward. When the clamp squeezes the reset spring, the clamp does not contact the outer surface of the gun barrel, that is, the clamp changes from an inclined state to a vertical state after being squeezed;

[0006] The front end of the gun rod is connected with a pulling part through a universal assembly, and the pulling part is connected with the tail end of the intramedullary nail handle;

[0007] A cylinder is provided at the front end of the handle in the radial direction around the gun barrel, the gun barrel passes through the axis of the cylinder, the abutment component is connected to the outside of the cylinder through a connecting block provided at its end, and the other end of the abutment component abuts against the patient's bone. The connecting block structure is the existing technology, and the connecting block can make circumferential rotational motion relative to the cylinder and can lock its position after rotation adjustment.

[0008] Beneficial effects of the present invention:

[0009] In the intramedullary nailing surgery to treat long bone fractures of the limbs, the gun-type pulling forceps can pull the distal segment of the fracture toward the proximal segment to achieve exact pressurization of the fracture ends. After the pressurization operation is completed, the pressurization effect can be effectively maintained, so that the fracture ends are in close contact after internal fixation, providing a stable and reliable mechanical conduction environment for fracture healing, promoting fracture healing, and effectively avoiding the occurrence of delayed fracture healing and nonunion complications. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural diagram of the present invention.

[0011] Figure 2 It is a three-dimensional schematic diagram of the present invention.

[0012] Figure 3 It is a top view of the present invention.

[0013] Figure 4 yes Figure 3 Cross-sectional view at AA in the middle.

[0014] Figure 5 yes Figure 4 A partial enlarged schematic diagram of point B in the middle.

[0015] Figure 6 It is a schematic diagram of the structure in which the cover is not connected to the handle.

[0016] Figure 7 yes Figure 6 Schematic diagram of the structure at point C in the middle.

[0017] Figure 8 It is a schematic diagram of the opening and closing of the first rotating half ring and the second rotating half ring.

[0018] Fig. 9 It is a three-dimensional schematic diagram of the cover plate of the present invention not being connected to the handle.

[0019] Fig.10 It is a schematic diagram of pressing the trigger.

[0020] Fig.11It is the schematic diagram of pressing the card. DETAILED DESCRIPTION

[0021] See also Figures 1 to 11 As shown, a gun-type pulling pliers which can effectively pressurize the fractured end of a bone comprises a handle 1, a gun rod 2 passes through and is axially slidably installed inside the handle 1, the gun rod 2 passes through a paddle 3, the paddle 3 is arranged inside a first accommodating cavity of the handle 1, a compression spring 4 is arranged between the paddle 3 and the handle 1, the compression spring 4 is sleeved outside the gun rod 2, the paddle 3 is located at the front end of the compression spring 4, a trigger 6 is rotatably installed at the front end of the handle 1, and a direction-changing component 5 is rotatably connected inside the first accommodating cavity of the handle 1, the direction-changing component 5 abuts against the paddle 3 and the front end of the handle 1, and when the trigger 6 is pulled, the top of the trigger 6 abuts against and squeezes the lower end of the direction-changing component 5, and the upper end of the direction-changing component 5 abuts against and squeezes the paddle 3. At the lower end of the paddle 3, the trigger 6 drives the paddle 3 to squeeze the compression spring 4 through the direction-changing assembly 5. At the same time, the paddle 3 abuts against the top and bottom surfaces of the gun barrel 2 and drives the gun barrel 2 to slide backward. After being squeezed, the paddle 3 changes from a vertical state at rest to an inclined state. The gun barrel 2 passes through the clamp 7, and the clamp 7 is connected to the inside of the second accommodating cavity of the handle 1. The top of the clamp 7 is rotatably connected to the handle 1. A reset spring 8 is arranged between the clamp 7 and the handle 1. The clamp 7 abuts against the top and bottom surfaces of the gun barrel 2 to prevent the gun barrel 2 from moving forward. When the clamp 7 squeezes the reset spring 8, the clamp 7 does not contact the outer surface of the gun barrel 2, that is, the clamp 7 changes from an inclined state to a vertical state after being squeezed.

[0022] The front end of the gun rod 2 is connected to a pulling part 10 through a universal assembly 9, and the pulling part 10 is connected to the rear end of the intramedullary nail handle;

[0023] A cylinder 11 is provided at the front end of the handle 1 in the radial direction around the gun barrel 2. The gun barrel 2 passes through the axis of the cylinder 11. The abutment component 12 is connected to the outside of the cylinder 11 through a connecting block 13 provided at its end. The other end of the abutment component 12 abuts against the patient's bone. The connecting block 13 is a prior art structure. The connecting block 13 can make circumferential rotational motion relative to the cylinder 11 and can lock its position after rotation adjustment.

[0024] Furthermore, the pulling portion 10 is a hook.

[0025] Furthermore, the universal joint assembly 9 is a universal joint with a locking function.

[0026] Furthermore, the universal assembly 9 includes a cavity tube 90 with an opening at one end, the cavity tube 90 is fixedly connected to the front end of the gun barrel 2, a sliding column 91 and a rotating ball 92 are arranged inside the cavity tube 90, the opening side of the cavity tube 90 is threadedly connected to a limiting cap 93, the limiting cap 93 is axially provided with a through hole, one end of the pulling part 10 passes through the through hole and is fixedly connected to the rotating ball 92, a bolt 94 is radially penetrated by the cavity tube 90, the middle part of the bolt 94 is located inside the cavity tube 90 and is eccentrically connected to a squeezing ball 95, when the bolt 94 is rotated, the squeezing ball 95 squeezes the sliding column 91 and then squeezes the rotating ball 92 to ensure that the pulling part 10 is locked, if the pulling part 10 is a hook, one end of the hook is fixedly connected to the rotating ball 92.

[0027] Furthermore, the diameter of the hollow tube 90 is smaller than the diameter of the cylinder 11, which can ensure that the abutting component 12 can be separated from the gun barrel 2 during postoperative disinfection.

[0028] Furthermore, ball recesses cooperating with the rotating ball 92 and the squeezing ball 95 are provided inwardly on both sides of the sliding column 91, and their function is to increase the contact area between the sliding column 91 and the rotating ball 92 and the squeezing ball 95, and further improve the stability of the locking of the pulling part 10.

[0029] Furthermore, the abutment component 12 includes a connection block 13 , a connection rod 120 and a clamp 121 . The connection block 13 is connected to the outside of the cylinder 11 of the gun barrel 2 , and the clamp 121 is connected to the front end of the connection rod 120 .

[0030] Furthermore, the clamp 121 includes a first rotating half ring 1210 and a second rotating half ring 1211. The first rotating half ring 1210 is fixedly connected to the connecting rod 120, and the second rotating half ring 1211 is hinged to the connecting rod 120 by bolts. The first rotating half ring 1210 and the second rotating half ring 1211 can be closed to form a hollow ring. The purpose of the fixed connection between the first rotating half ring 1210 and the connecting rod 120 is to ensure that the first rotating half ring 1210 and the second rotating half ring 1211 will not rotate relative to the connecting rod 120 and slip during pulling.

[0031] Furthermore, magnets 1213 are embedded in the contacting end surfaces of the first rotating half ring 1210 and the second rotating half ring 1211 .

[0032] Furthermore, a detachable cover plate 14 is provided outside the first accommodating cavity and the second accommodating cavity of the handle 1 , and the cover plate 14 can be connected to the outside of the handle 1 by screws.

[0033] Furthermore, the end of the gun barrel 2 is connected with a holding component 15, and the holding component 15 can be a spherical component for easy grasping.

[0034] The use process of the present invention:

[0035] When in use, the second rotating half ring 1211 of the abutting component 12 is bent to open a gap, and the tail end of the intramedullary nail is sleeved inside the first rotating half ring 1210 and the second rotating half ring 1211. After the sleeve is completed, the end faces of the first rotating half ring 1210 and the second rotating half ring 1211 are in contact. The first rotating half ring 1210 and the second rotating half ring 1211 here limit the relative radial movement of the entire gun-type pulling forceps and the tail end of the intramedullary nail to avoid radial movement of the entire gun-type pulling forceps. The pulling part 10 is connected to the tail end of the intramedullary nail handle, and the abutting component 12 is in contact with the surface of the proximal end of the bone. The medical staff pulls the trigger 6 along the D direction. At this time, the upper end of the trigger 6 Under the action of the rotating shaft E, it moves in the direction F, and the upper end of the trigger 6 squeezes the lower end of the direction-changing component 5 in the direction F. The upper end of the direction-changing component 5 moves in the direction G under the action of the rotating shaft H, and then squeezes the lower end of the paddle 3. The paddle 3 contacts the upper and lower ends of the gun barrel 2, and the paddle 3 changes from a vertical state to an inclined state, driving the gun barrel 2 to move in the direction G. The compression spring 4 is compressed. After releasing the trigger 6, the compression spring 4 is reset under the elastic force of the compression spring 4, driving the paddle 3, the direction-changing component 5 and the trigger 6 to reset; by repeatedly pulling the trigger 6, the gun barrel 2 can drive the bone needle to continuously pull in the direction G. The universal assembly 9 at the front end of the gun barrel 2 can adjust the direction of the pulling part 10, which is convenient for surgical use.

[0036] After the operation is completed, the pulling part 10 is separated from the rear end of the intramedullary nail handle, so that the first rotating half ring 1210 and the second rotating half ring 1211 are separated from the rear end of the intramedullary nail. If the gun rod 2 is moved toward the rear end of the intramedullary nail, that is, in the direction of P, the following operation can be performed: the medical staff presses the clamp 7 in the direction of W, at which time the reset spring 8 is compressed, and the upper end of the clamp 7 rotates in the direction of W under the action of the rotating shaft Y, and the clamp 7 does not contact the upper and lower ends of the gun rod 2, that is, the inclined state changes to the vertical state. At this time, the gun rod 2 is pushed in the direction of P by hand, and the gun rod 2 moves in the direction of P. After moving to the appropriate position, the clamp 7 can be released.

[0037] During disinfection, the cover 14 is opened and the abutting component 12 is separated from the handle 1 so that the handle 1 is divided into multiple parts for disinfection, which makes the disinfection more thorough.

[0038] Working principle of the present invention

[0039] The clamp 7 is slightly tilted in a static state, and is held against the top and bottom surfaces of the gun barrel 2 by the elastic force of the return spring 8 to prevent the gun barrel 2 from moving forward. When the clamp 7 is pressed by hand, the clamp 7 will be ensured to be relatively vertical to the gun barrel 2, and the top and bottom surfaces of the gun barrel 2 will be separated from the clamp 7, so that the gun barrel 2 can slide freely.

[0040] In the normal state, due to the action of the compression spring 4, the paddle 3 is perpendicular to the gun barrel 2, and the paddle 3 does not contact the top and bottom surfaces of the gun barrel 2. When the trigger 6 begins to be pulled, the paddle 3 gradually begins to tilt under the action of the change-of-direction assembly 5, and the paddle 3 begins to resist the top and bottom surfaces of the gun barrel 2. Further pulling of the trigger 6 will drive the paddle 3 and the gun barrel 2 to move backward. When the trigger 6 is released, the action of the trigger 6 is just the opposite, and the gun barrel 2 is prevented from moving forward due to the action of the clamp 7.

Claims

1. A gun-type lifting forceps capable of effectively pressurizing the fracture ends, characterized in that: The invention comprises a handle (1), a gun rod (2) passing through and axially slidingly installed inside the handle (1), the gun rod (2) passing through a paddle (3), the paddle (3) being arranged inside a first accommodating cavity of the handle (1), a compression spring (4) being arranged between the paddle (3) and the handle (1), the compression spring (4) being sleeved outside the gun rod (2), the paddle (3) being located at the front end of the compression spring (4), a trigger (6) being rotatably installed at the front end of the handle (1), a direction-changing component (5) being rotatably connected inside the first accommodating cavity of the handle (1), the direction-changing component (5) being in contact with the paddle (3) and the front end of the handle (1), and when the trigger (6) is pulled, the top of the trigger (6) is in contact with and squeezes the lower end of the direction-changing component (5), and the upper end of the direction-changing component (5) is in contact with and squeezes the trigger (6). At the lower end of the paddle (3), the trigger (6) drives the paddle (3) to squeeze the compression spring (4) through the direction-changing assembly (5), and at the same time, the paddle (3) abuts against the top and bottom surfaces of the gun rod (2) and drives the gun rod (2) to slide backward. After being squeezed, the paddle (3) changes from a vertical state at rest to an inclined state. The gun rod (2) passes through the clamp (7), and the clamp (7) is connected to the inside of the second accommodating cavity of the handle (1). The top of the clamp (7) is rotatably connected to the handle (1). A return spring (8) is arranged between the clamp (7) and the handle (1). The clamp (7) abuts against the top and bottom surfaces of the gun rod (2) to prevent the gun rod (2) from moving forward. When the clamp (7) squeezes the return spring (8), the clamp (7) does not contact the outer surface of the gun rod (2); The front end of the gun rod (2) is connected to a pulling portion (10) via a universal assembly (9), and the pulling portion (10) is connected to the rear end of the intramedullary nail handle; A cylinder (11) is provided at the front end of the handle (1) in the radial direction around the gun rod (2), the gun rod (2) passes through the axis of the cylinder (11), the abutment component (12) is connected to the outside of the cylinder (11) via a connecting block (13) provided at the end thereof, the other end of the abutment component (12) abuts against the patient's bone, the connecting block (13) can perform circumferential rotation relative to the cylinder (11), and its position can be locked after rotation adjustment; The abutment component (12) comprises a connection block (13), a connection rod (120) and a clamp (121); the connection block (13) is connected to the outside of the cylinder (11) of the gun barrel (2), and the clamp (121) is connected to the front end of the connection rod (120).

2. The gun-type lifting forceps capable of effectively pressurizing the fracture ends according to claim 1, characterized in that: The pulling portion (10) is a hook.

3. The gun-type lifting forceps capable of effectively pressurizing the fracture ends according to claim 1, characterized in that: The universal joint assembly (9) is a universal joint with a locking function.

4. The gun-type lifting forceps capable of effectively pressurizing the fracture ends according to claim 1, characterized in that: The universal assembly (9) comprises a hollow tube (90) with an opening at one end, the hollow tube (90) being fixedly connected to the front end of the gun barrel (2), a sliding column (91) and a rotating ball (92) being arranged inside the hollow tube (90), a limiting cap (93) being threadedly connected to the opening side of the hollow tube (90), a through hole being axially arranged on the limiting cap (93), one end of the pulling part (10) passing through the through hole and being fixedly connected to the rotating ball (92), a bolt (94) being radially passed through the hollow tube (90), a squeezing ball (95) being eccentrically connected to the middle part of the bolt (94) located inside the hollow tube (90), and when the bolt (94) is rotated, the squeezing ball (95) squeezes the sliding column (91) and further squeezes the rotating ball (92) to lock the pulling part (10).

5. The gun-type lifting forceps capable of effectively pressurizing the fracture ends according to claim 4, characterized in that: Ball recesses matching the rotating ball (92) and the squeezing ball (95) are provided inwardly on both sides of the sliding column (91).

6. The gun-type lifting forceps capable of effectively pressurizing the fracture ends according to claim 4, characterized in that: The diameter of the hollow tube (90) is smaller than the diameter of the cylinder (11).

7. The gun-type lifting forceps capable of effectively pressurizing the fracture ends according to claim 1, characterized in that: The clamp (121) comprises a first rotating half ring (1210) and a second rotating half ring (1211); the first rotating half ring (1210) is fixedly connected to the connecting rod (120); the second rotating half ring (1211) is hinged to the connecting rod (120) via bolts; the first rotating half ring (1210) and the second rotating half ring (1211) can be closed to form a hollow circular ring.

8. The gun-type lifting forceps capable of effectively pressurizing the fracture ends according to claim 7, characterized in that: A magnet (1213) is embedded in the contact end surfaces of the first rotating half ring (1210) and the second rotating half ring (1211).

9. The gun-type lifting forceps capable of effectively pressurizing the fracture ends according to claim 1, characterized in that: A detachable cover plate (14) is provided outside the first accommodating cavity and the second accommodating cavity of the handle (1), and the cover plate (14) is connected to the outside of the handle (1). A holding component (15) is connected to the end of the gun barrel (2).

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