Mallet finger orthosis

Abstract

The present invention relates to a hammer finger orthosis, comprising a wearing part, a fixing part and a wire fixer, the wire fixer comprising a traction and pressure device, the traction and pressure device comprising a wire seat with a U-shaped threading hole, the U-shaped threading hole comprising an inlet hole section, an intermediate hole section and an outlet hole section, a wire fixing traction mechanism is provided on the wire seat, the wire fixing traction mechanism comprises a wire fixing seat and a traction force adjustment component for driving the wire fixing seat to move along the traction direction of the surgical fixed thread, a traction force indication mechanism is provided on the intermediate hole section, the traction force indication mechanism comprises a traction force indication slider and a support spring, one end of the traction force indication slider is provided with a wire positioning head corresponding to the intermediate hole section, the other end of the traction force indication slider is provided with an indication scale, the traction force indication slider is floatingly supported on the wire seat through the support spring, and the support spring drives the wire positioning end of the traction force indication slider to extend into the intermediate hole section. The controllable traction force of the surgical fixed thread is achieved, which has the advantages of reducing the difficulty of the operation and improving the operation effect.

Description

Technical Field

[0001] The invention relates to a surgical instrument, in particular to an orthosis used for correcting and fixing a phalanx fracture in a mallet finger. Background Art

[0002] Mallet finger is caused by the violent flexion of the finger, which causes the tearing of the insertion point of the extensor tendon or the avulsion fracture of the attachment of the extensor tendon of the distal phalanx, resulting in flexion deformity of the distal phalanx of the finger, and cannot be actively straightened. According to the type of injury, it is clinically divided into skeletal mallet finger (avulsion fracture of the distal end of the extensor tendon together with the base of the distal phalanx) and tendinous mallet finger (simple rupture of the extensor tendon end). Surgical treatment is an important means of treating mallet finger. For the tearing of the insertion point of the extensor tendon or the tearing of the tendon with a small fracture fragment, the operation uses a Kirschner wire to be inserted obliquely into the phalanx to fix the phalanx joint, two small holes are drilled at the base of the distal phalanx on both sides of the bone fragment, and the surgical fixation thread is passed through the small holes and across the insertion point of the extensor tendon to fix the bone fragment, and the two ends of the surgical fixation thread pass through the finger surface, and the two free ends of the surgical fixation thread pass through the finger surface and are tied to the Kirschner wire, so as to achieve the reduction of the fracture fragment under the traction of the surgical thread.

[0003] However, the existing surgical process has the following problems: the surgical fixation thread is fixed on the Kirschner wire by binding, the traction force of the surgical fixation thread is inconvenient to control, and the surgical situation depends more on the experience of the operator, resulting in uncertainty in the surgical effect and difficulty in operation. Summary of the invention

[0004] Purpose of the invention: To overcome the defects of the prior art, the present invention provides a hammer finger orthosis with controllable traction force of surgical fixation wire, which reduces the difficulty of surgery and improves the surgical effect.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A hammer finger orthosis, comprising a wearing part sleeved and fixed on the finger, the wearing part having a fixing part extending along one side of the finger surface to the fingertip position, the fixing part correspondingly provided with a wire fixer at the fingertip position, the wire fixer comprising a traction and pressure device, the traction and pressure device comprising a wire seat, the wire seat provided with a U-shaped threading hole, the U-shaped threading hole comprising an inlet hole section facing the finger surface, an intermediate hole section extending in the direction of palm thickness and an outlet hole section extending in the direction of finger length, the wire seat provided with a fixed wire traction mechanism corresponding to the outlet hole section, the fixed wire traction mechanism It includes a wire fixing seat and a traction force adjustment component that drives the wire fixing seat to move along the traction direction of the surgical fixing wire. A traction force indicating mechanism is provided on the middle hole section. The traction force indicating mechanism includes a traction force indicating slider and a supporting spring. One end of the traction force indicating slider is a wire positioning head corresponding to the middle hole section and supporting the surgical fixing wire. An indicating scale is provided on the end of the traction force indicating slider facing the finger surface. The traction force indicating slider is floatingly supported on the wire seat through the supporting spring. The supporting spring drives the wire positioning end of the traction force indicating slider to extend into the middle hole section.

[0007] By adopting the above technical scheme, the wire entry hole section of the U-shaped threading channel is designed to face the finger surface, which is convenient for the introduction of the surgical fixation thread. The surgical fixation thread is guided through the U-shaped threading channel, which is convenient for the parallel strand guidance of the surgical fixation thread. The surgical fixation thread is supported by a traction force indicating slider, and the traction force indicating slider is supported by a supporting spring to realize traction force feedback of the surgical fixation thread, so that the traction force can be indicated in the initial stage. After the surgical fixation thread is fixed, the operator can adjust the traction force according to the actual fracture block reduction situation to ensure reliable fracture block reduction and facilitate more precise control of the traction force.

[0008] Preferably, the traction force adjustment assembly includes an adjustment screw and a nut block, the adjustment screw and the nut block are threadedly matched, the fixing part includes two parallel fixed arms, a gap is formed between the fixed arms, the wire seat is protruded on one side facing the finger surface and is provided with a nut block guide seat extending into the gap, the nut block guide seat has a nut guide hole cavity, the nut guide hole cavity is correspondingly connected to the outlet hole section, the nut block is linearly positioned and slidably matched in the nut guide hole cavity, the adjustment screw is positioned and rotated to match the nut block guide seat, the adjustment screw has an adjustment end placed in the gap, and the wire seat is fixed on the nut block. Under this structural design, the rotation of the adjustment screw realizes the linear movement of the nut, thereby realizing the traction of the surgical fixing wire, and achieving the traction force adjustment of the surgical fixing wire. The adjustment operation is simple and reliable, and the linear movement of the adjustment nut is used to realize the control of the traction force. During the adjustment process, the surgical fixing wire that is twisted will not twist and affect the traction force, making the traction force control more accurate and reliable; in addition, the fixing part adopts a two-arm design, and the wire seat protrudes the nut block guide seat toward the gap between the two arms, which has the advantage of compact structure.

[0009] Preferably, the end connecting the inlet hole section and the middle hole section is a through hole penetrating the wire seat, the middle hole section is slot-shaped, the inlet of the outlet hole section is penetrating the wire seat, and the side of the wire seat facing away from the fingertips is covered with a protective cover. Under this structural design, the threading operation of the surgical fixation thread is convenient, and the protective cover is covered on the back of the wire seat after the threading operation is completed to achieve a protective effect.

[0010] Preferably, the wire fixer also includes a positioning box, the wire holder is adjustable in position and arranged on the positioning box, a flat positioning cavity is arranged in the positioning box and is flat along the length of the finger, the wire holder is flat, and is positioned in the positioning box along the length of the finger, and the wire holder is adjustable in position along the palm thickness direction and along the finger width direction in the flat positioning cavity. Under this structural design, as the position of the wire holder is moved and adjusted, the traction direction of the fracture position by the surgical fixation wire is adjusted, so that the reduction of the fracture fragment is more reliable and the patient's rehabilitation effect is improved.

[0011] Preferably, strip-shaped transverse guide grooves are provided on the top and bottom surfaces of the positioning box, extending in the direction of the corresponding finger width. The sliding guide in the transverse guide groove of the positioning box is matched with a transverse guide block, and the transverse guide block located on the top surface of the positioning box is matched with a longitudinal adjustment bolt for positioning and rotation. The wire seat is provided with a longitudinal threaded hole corresponding to the longitudinal adjustment bolt, and the longitudinal adjustment bolt is screwed on the longitudinal threaded hole. A guide rod is provided on the transverse guide block located on the bottom surface of the positioning box, and a guide hole matched with the guide rod guide is provided on the wire seat. The back side of the positioning box away from the fingertips has two relatively arranged guide convex plates, and the guide convex plates are provided with longitudinal guide grooves, and the sliding guide in the longitudinal guide groove is matched with a longitudinal guide block, and the longitudinal guide block is matched with an adjusting screw for positioning and rotation. The back side of the wire seat away from the fingertips has a nut protrusion, and the adjusting screw thread is matched with the nut protrusion. Under this structural design, the position of the wire seat is adjusted by positioning and rotating the longitudinal adjustment bolt and the transverse adjustment bolt, which has the advantages of simple adjustment operation and compact structure. In addition, the structural design of transverse adjustment and longitudinal adjustment effectively takes into account the design space requirements of the U-shaped threading hole, and has the advantages of compact structure and reliable movement of the wire seat position adjustment.

[0012] Preferably, the positioning box is provided with a protruding plug sleeve, the plug sleeve is plugged into the end of the fixed arm, and the plug sleeve is provided with a locking screw, which is locked with the fixed arm. This structural design is convenient for parts processing and has the advantage of easy assembly.

[0013] The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a diagram showing the use state of a hammer finger orthosis according to a specific embodiment of the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of a wire fixer according to a specific embodiment of the present invention;

[0016] Figure 3 It is a structural schematic diagram of the wire fixer of a specific embodiment of the present invention when the protective cover is removed;

[0017] Figure 4 This is a schematic structural diagram of a traction and pressurizing device according to a specific embodiment of the present invention;

[0018] Figure 5 for Figure 4 The cross-sectional view taken along line AA;

[0019] Figure 6 for Figure 4 Sectional view taken along line BB. DETAILED DESCRIPTION

[0020] See attached Figures 1 to 6The present invention discloses a hammer finger orthosis, comprising a wearing part 1 which is sleeved and fixed on a finger I, wherein the wearing part 1 is a sleeve with an opening on one side, and a buckle is provided on the opening side of the sleeve, and the wearing part 1 has a fixing part 11 which extends along one side of the finger surface I-2 to the position of the fingertip I-1, and the wearing part 1 can be made of plastic, and the fixing part 11 is made of metal, so as to facilitate wearing and take into account both structural strength, and the fixing part 11 is provided with a wire fixer 3 at the fingertip position, and the wire fixer 3 includes a traction and pressure device, and the traction and pressure device includes a wire holder 31, and a U-shaped threading hole 311 is provided on the wire holder 31, and the U-shaped threading hole 311 includes a wire entry hole section 3111 facing the finger surface I-2, a middle hole section 3112 extending in the direction of palm thickness, and a wire outlet hole section 3113 extending in the direction of finger length, and the wire A fixed wire traction mechanism 32 corresponding to the wire outlet hole section 3113 is provided on the seat 31, and the fixed wire traction mechanism 32 includes a fixed wire seat 321 and a traction adjustment component that drives the fixed wire seat 321 to move along the traction direction of the surgical fixed wire. A traction indicating mechanism 33 is provided on the middle hole section 3112, and the traction indicating mechanism 33 includes a traction indicating slider 331 and a support spring 332. One end of the traction indicating slider 331 is a wire positioning head 3311 corresponding to the middle hole section 3112 and supporting the surgical fixed wire. The end of the traction indicating slider 331 facing the finger surface I-2 is provided with an indicating scale 3312. The traction indicating slider 331 is floatingly supported on the wire seat through the support spring 332, and the support spring 332 drives the wire positioning end of the traction indicating slider 331 to extend into the middle hole section 3112. The wire entry hole section 3111 of the U-shaped threading channel is designed to face the finger surface I-2, which is convenient for the introduction of the surgical fixation thread. The surgical fixation thread is guided through the U-shaped threading channel, which is convenient for the parallel strand guidance of the surgical fixation thread. The surgical fixation thread is supported by a traction force indicating slider 331, and the traction force indicating slider 331 is supported by a support spring 332 to realize traction force feedback of the surgical fixation thread, so that the traction force can be indicated in the initial stage. After the surgical fixation thread is fixed, the operator can adjust the traction force according to the actual fracture fragment reduction situation to ensure reliable fracture fragment reduction and facilitate more precise control of the traction force.

[0021] The traction force adjustment component includes an adjusting screw 322 and a nut block 323, the adjusting screw 322 is threadedly matched with the nut block 323, the fixing portion 11 includes two parallel fixed arms 111, a gap 112 is formed between the fixed arms 111, the wire seat 31 is protruded on one side facing the finger surface I-2 and is provided with a nut block guide seat 314 extending into the gap 112, the nut block guide seat 314 has a nut guide hole cavity 31141, the nut guide hole cavity 31141 is correspondingly connected to the outlet hole section 3113, the nut block 323 is linearly positioned and slidably matched in the nut guide hole cavity 31141, the adjusting screw 322 is positioned and rotatably matched on the nut block guide seat 314, the adjusting screw 322 has an adjusting end 3221 placed in the gap 112, and the wire fixing seat 321 is fixed on the nut block 323. Rotating the adjusting screw 322 realizes the linear movement of the nut, thereby realizing the traction of the surgical fixation wire, and achieving the traction force adjustment of the surgical fixation wire. The adjustment operation is simple and reliable, and the linear movement of the adjusting nut is used to realize the control of the traction force. During the adjustment process, the surgical fixation wire that is twisted will not be twisted and affect the traction force, making the traction force control more accurate and reliable; in addition, the fixing part 11 adopts a two-arm design, and the wire seat 31 protrudes the nut block guide seat 314 toward the interval 112 between the two arms, which has the advantage of compact structure. Of course, as a feasible solution of the present invention, the traction force adjustment component can adopt a winding mechanism, a gear rack mechanism, etc., but the nut screw mechanism design has the advantages of stable adjustment, convenient operation and compact structure.

[0022] To facilitate the threading operation, the end connecting the inlet hole section 3111 and the middle hole section 3112 is a through hole penetrating the wire seat 31, the middle hole section 3112 is slot-shaped, the inlet of the outlet hole section 3113 is penetrating the wire seat 31, and the side of the wire seat 31 facing away from the fingertips is covered with a protective cover 34. To facilitate the threading operation of the surgical fixing thread, the protective cover 34 is covered on the back of the wire seat after the threading operation is completed to achieve a protective effect.

[0023] In this specific embodiment, the wire fixer 3 also includes a positioning box 35, the wire holder 31 is adjustable in position and is arranged on the positioning box 35, the positioning box 35 is detachably mounted on the fixing part 11, thereby constituting that the wire fixer 3 is detachably mounted on the fixing part 11, a flat positioning cavity 350 is provided in the positioning box 35 which is flat along the length direction of the finger, the wire holder 31 is flat, the flat wire holder 31 is positioned in the positioning box 35 along the length direction of the finger, and the wire holder 31 is adjustable in position along the palm thickness direction and along the finger width direction in the flat positioning cavity 350. With the movement and adjustment of the position of the wire holder, the traction direction of the fracture position by the surgical fixation wire is adjusted, so that the reduction of the fracture fragment is more reliable and the patient's rehabilitation effect is improved. With the cooperation of the flat structure, it has the advantages of compact wire holder structure and reliable positioning.

[0024] The top and bottom surfaces of the positioning box 35 are provided with strip-shaped transverse guide grooves 351 extending in the corresponding finger width direction, the transverse guide grooves 351 of the positioning box 35 are slidingly guided with transverse guide blocks 352, and the transverse guide blocks 352 located on the top surface of the positioning box 35 are positioned and rotated with longitudinal adjustment bolts 353, the wire holder 31 is provided with longitudinal threaded holes 315 corresponding to the longitudinal adjustment bolts 353, the longitudinal adjustment bolts 353 are screwed on the longitudinal threaded holes 315, and the transverse guide blocks 352 located on the bottom surface of the positioning box 35 are provided with guide rods, and the wire holder 31 is provided with guide holes 316 that cooperate with the guide rods, wherein the longitudinal threaded holes 315 are located at the center of the wire holder. The conductor holder 31 is provided with guide holes 316 located on both sides of the longitudinal threaded hole 315, which has the advantages of stable and reliable longitudinal movement of the conductor holder. The guide holes 316 avoid the middle position and have more dimensional space to achieve reliable guidance of the conductor holder. The back protrusion of the positioning box 35 away from the fingertips has two relatively arranged guide convex plates 354, and the guide convex plates 354 are provided with longitudinal guide grooves 3541. The longitudinal guide grooves 3541 are equipped with longitudinal guide blocks 355 for sliding guidance. The longitudinal guide blocks 355 are equipped with adjustment screws 356 for positioning and rotation. The back protrusion of the conductor holder 31 away from the fingertips has nut protrusions 317, and the adjustment screws 356 are threadedly matched on the nut protrusions 317. Under this structural design, the longitudinal adjustment bolts 353 for positioning and rotation and the transverse adjustment bolts for positioning and rotation are used to adjust the position of the conductor holder, which has the advantages of simple adjustment operation and compact structure. In addition, under the structural design of transverse adjustment and longitudinal adjustment, the design space requirements of the U-shaped threading hole are effectively taken into account, which has the advantages of compact structure and reliable movement of the conductor holder position adjustment. The protective cover 34 is covered on the back of the positioning box 35, so as to protect the wire holder; and the protective cover 34 is covered on the outer contour of the positioning box 35, covering the position adjustment mechanism of the wire holder, playing a protective role, and is convenient for patients to wear. The front side wall of the positioning box 35 close to the fingertips and the back side away from the fingertips have a hollow design for the corresponding raised parts of the wire holder (such as the nut block guide seat 314 and the nut protrusion 317) to move and make way when the position of the wire holder is adjusted.

[0025] The positioning box 35 is provided with a plug sleeve 357, which is plugged into the end of the fixed arm 111. The plug sleeve 357 is provided with a locking screw 358, which is locked with the fixed arm 111. The wire fixer 3 is reliably fixed, which is convenient for the patient to wear in the future.

Claims

1. A mallet finger orthosis, characterized in that: The invention comprises a wearing part which is sleeved and fixed on the finger, the wearing part has a fixing part which extends along one side of the finger surface to the finger tip position, the fixing part is provided with a wire fixing device at the finger tip position, the wire fixing device comprises a traction and pressure device, the traction and pressure device comprises a wire seat, a U-shaped wire threading channel is provided on the wire seat, the U-shaped wire threading channel comprises an inlet hole section facing the finger surface, an intermediate hole section extending along the palm thickness direction and an outlet hole section extending along the finger length direction, the wire seat is provided with a wire fixing traction mechanism which corresponds to the outlet hole section, the wire fixing traction mechanism comprises a wire fixing seat and a driving fixing A traction adjustment component for a wire seat to move along the traction direction of a surgical fixed wire, wherein a traction indication mechanism is provided on the middle hole section, the traction indication mechanism comprising a traction indication slider and a support spring, one end of the traction indication slider being a wire positioning head corresponding to the middle hole section and supporting the surgical fixed wire, an indicating scale being provided on the end of the traction indication slider facing the finger surface, the traction indication slider being floatingly supported on the wire seat via the support spring, the support spring driving the wire positioning end of the traction indication slider to extend into the middle hole section, the traction adjustment component comprising an adjusting screw and a nut block, the adjusting screw being threadedly matched with the nut block, the fixing portion comprising two parallel fixed arms, a gap being formed between the fixed arms, a nut block guide seat extending into the gap being provided on a protrusion on one side of the wire seat facing the finger surface, the nut block guide seat having a nut guide hole cavity, the nut guide hole cavity being correspondingly connected to the wire outlet hole section, the nut block being linearly positioned and slidably matched in the nut guide hole cavity, the adjusting screw being positioned and rotatably matched on the nut block guide seat, the adjusting screw having an adjusting end placed in the gap, and the wire fixing seat being fixed on the nut block The wire inlet hole section is connected to the middle hole section at one end and is a through hole that passes through the wire seat. The middle hole section is slot-shaped. The wire inlet of the wire outlet hole section passes through the wire seat. A protective cover is provided on the side of the wire seat that is away from the fingertips. The wire holder also includes a positioning box. The position of the wire seat can be adjusted on the positioning box. A flat positioning cavity that is flat along the length direction of the finger is provided in the positioning box. The wire seat is flat, and the flat wire seat is positioned in the positioning box along the length direction of the finger. The position of the wire seat along the palm thickness direction and the finger width direction can be adjusted in the flat positioning cavity.

2. The hammer finger orthosis according to claim 1, characterized in that: The top and bottom surfaces of the positioning box are provided with strip-shaped transverse guide grooves extending in the direction of the corresponding finger width, the transverse guide grooves of the positioning box are equipped with transverse guide blocks for sliding guides, and the transverse guide blocks located on the top surface of the positioning box are equipped with longitudinal adjustment bolts for positioning and rotation. The wire seat is provided with a longitudinal threaded hole corresponding to the longitudinal adjustment bolt, and the longitudinal adjustment bolt is screwed on the longitudinal threaded hole. A guide rod is provided on the transverse guide block located on the bottom surface of the positioning box, and a guide hole is provided on the wire seat for matching with the guide rod guide. The back side of the positioning box away from the fingertips has two relatively arranged guide convex plates, and the guide convex plates are provided with longitudinal guide grooves, and the sliding guide in the longitudinal guide grooves is equipped with longitudinal guide blocks, and the longitudinal guide blocks are equipped with adjustment screws for positioning and rotation. The back side of the wire seat away from the fingertips has a nut protrusion, and the adjusting screw thread is matched with the nut protrusion.

3. The hammer finger orthosis according to claim 2, characterized in that: The positioning box is provided with a protruding plug sleeve, the plug sleeve is plugged into the end of the fixed arm, and a locking screw is provided on the plug sleeve, and the locking screw is locked and matched with the fixed arm.

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