Patella reduction guider
By designing a patellar reduction guide, the problem of inaccurate guidance of Kirschner wires in patellar fracture surgery was solved, achieving controllable insertion of Kirschner wires and improving surgical efficiency, while protecting the operational safety of medical staff.
Patent Information
- Application Number
- CN202422457715.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-10-11
AI Technical Summary
The lack of suitable tools in the current technology to guide the penetration position of Kirschner wires results in non-parallel Kirschner wire angles and inability to be inserted into the ideal position during patellar fracture surgery. In addition, the surgical operation area is limited, which increases the risk of patellar bone damage.
A patellar reduction guide was designed, including a first and second clamp handle hinged together, with clamping jaws and a guide tube, and a channel coaxially connected. It is used to clamp the patella and guide the Kirschner wire to be quickly inserted into the ideal position. It is equipped with a limiting device and a flexible hand ring to facilitate operation and protect medical staff.
This allows for controlled insertion of Kirschner wires, reducing patellar bone damage, improving surgical efficiency, and protecting the operational safety of medical staff.
Smart Images
Figure CN223554940U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medical instrument technical field especially relates to a patella reduction guider. BACKGROUND
[0002] The patella is relatively shallow in the knee position, so it is easy to cause fracture due to external force impact or sudden strong contraction of the quadriceps femoris. At present, the main clinical treatment of patella fracture is open reduction and internal fixation, and the commonly used open reduction and internal fixation adopts kirschner wire penetration and "8" shape steel wire tension band fixation (kirschner wire penetration is fixed by stainless steel wire), which is an ideal way. During the operation, the patella is clamped by reduction forceps to keep each bone block fixed, and then kirschner wire is penetrated on the bone block.
[0003] If kirschner wire is directly punched by electric drill during the operation, the double needle angle may not be parallel, the kirschner wire and the articular surface may not be parallel, and the ideal position cannot be punched. Therefore, the kirschner wire penetration position needs to be guided in this process, and a certain guiding tool needs to be used for guiding. However, the bone block has a small volume, and the operation area will be further reduced after the part of the position is clamped by the reduction forceps. At present, there is no suitable guiding tool. SUMMARY
[0004] In view of the deficiencies in the background art, the utility model aims at providing a patella reduction guider.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0006] A patella reduction guider, comprising a first jaw and a second jaw which are hingedly connected, one end of the first jaw is provided with at least one first jaw claw, one end of the second jaw is provided with two second jaw claws, the two second jaw claws are in the same direction and opposite to the first jaw claw, and a guide cylinder is connected to one end of the second jaw in a direction away from the first jaw claw, a first channel and a second channel are respectively arranged in the second jaw claw and the guide cylinder, and the first channel and the second channel are coaxially and communicatively arranged.
[0007] Further, a first transition part is connected to the first jaw and the first jaw claw at both ends, and a second transition part is connected to the second jaw and the second jaw claw at both ends, and one end of the second transition part away from the first jaw claw is connected with the guide cylinder.
[0008] Further, the cross section of the first jaw claw in the direction away from the first jaw gradually decreases, and the cross section of the second jaw claw in the direction away from the second jaw gradually decreases.
[0009] Further, the other end of the first and second handles is provided with a hand ring.
[0010] Further, the hand ring is provided with a flexible layer at least in part, and the surface of the flexible layer is provided with a plurality of anti-skid stripes.
[0011] Further, a limiting device is arranged between the first and second handles, and the limiting device is used for maintaining the size of the first and second handles when they are opened.
[0012] Further, the limiting device comprises a first clamping tooth and a second clamping tooth, the first clamping tooth is arranged at the other end of the first handle, the second clamping tooth is arranged at the other end of the second handle, and the first and second clamping teeth are clamped with each other.
[0013] Further, the limiting device comprises an arc-shaped gear rack arranged at the other end of the first handle, the second handle is provided with a fixed hole, the arc-shaped gear rack penetrates through the fixed hole along with the opening and closing of the first handle, and the second handle is further provided with a movable locking part, and the locking part is provided with a convex part engaged with the arc-shaped gear rack.
[0014] Further, the other end of the second handle is provided with a containing cavity, the containing cavity is provided with a sliding groove, the locking part is provided with a sliding part, the sliding part is movably matched with the sliding groove at least in part, the sliding groove is provided with an elastic part, and the elastic part abuts against the sliding part.
[0015] Further, the locking part is provided with a pressing part, the sawtooth of the arc-shaped gear rack is inclined towards one side, and the convex part is matched with the sawtooth.
[0016] The utility model discloses the beneficial effect is:
[0017] 1. The utility model provides a patella reset guide device, including mutually hinged first handle and second handle, the one end of first handle is provided with at least one first pincer claw, and the one end of second handle is provided with two second pincer claws, and the two second pincer claws are homeward and all with first pincer claw opposite, and the one end of second handle is connected with guide cylinder along the direction of away from first pincer claw, and first channel and second channel are arranged respectively in second pincer claw and guide cylinder, and first channel and second channel are coaxially communicated and are arranged, and first pincer claw and second pincer claw are convenient for clamping the patella of patient and make it fixed, satisfy the operation reset demand, and the guide channel of first channel and second channel coaxial communication arrangement simultaneously constitutes the ideal position of the quick punch of kirsch needle in the patella of patient, makes the controllable track of punch, avoids the damage of repeated multiple wear and tear to patella bone quality caused by " blind punch " to improve the efficiency of operation.
[0018] 2. The utility model provides a patella reset guide, the first handle and the second handle between being equipped with limiting device, limiting device is used for maintaining the size that the first handle and the second handle open, the first handle and the second handle other end still be equipped with hand ring, the setting of hand ring is convenient for the operation of medical staff, hand ring is equipped with flexible layer, the setting can protect medical staff in the case of long -term operation and the finger will not wear and hurt of flexible layer, a plurality of antiskid stripes are equipped on the surface of flexible layer, make medical staff hold when not easy to slip. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, obviously, the drawings in the following description only some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying creative labor, other drawings can also be obtained according to these drawings.
[0020] Figure 1 It is a schematic view of the embodiment one of the utility model for a patella reset guide.
[0021] Figure 2 It is a schematic view of the embodiment one of the utility model for a patella reset guide.
[0022] Figure 3 It is the A place of Figure 2 enlarged schematic view.
[0023] Figure 4 It is the local schematic view of the embodiment two of the utility model for a patella reset guide.
[0024] Figure 5 It is the local sectional view of the embodiment two of the utility model for a patella reset guide.
[0025] Figure 6 It is the B place of Figure 4 enlarged schematic view.
[0026] Figure 7 It is the C place of Figure 5 enlarged schematic view.
[0027] In the drawing, 10, first handle, 101, first jaw, 102, first transition part, 20, second handle, 201, second jaw, 202, guide cylinder, 203, second transition part, 301, first channel, 302, second channel, 401, first buckling tooth, 402, second buckling tooth, 50, arc-shaped rack, 601, fixed hole, 602, locking part, 6021, convex part, 6022, sliding part, 6023, pressing part, 603, containing cavity, 604, sliding groove, 605, elastic part, 70, hand ring. DETAILED DESCRIPTION
[0028] The utility model is described in detail below Figures 1-7 The utility model is described in detail below
[0029] Embodiment one
[0030] As Figures 1-3 shown, a patella reduction guide includes a first jaw 10 and a second jaw 20 that are hingedly connected to each other, the first jaw 10 has at least one first jaw 101 at one end, the second jaw 20 has two second jaws 201 at one end, the two second jaws 201 are in the same direction and opposite to the first jaw 101, the second jaw 20 is connected with a guide cylinder 202 in the direction away from the first jaw 101 at one end, the first jaw 101 and the second jaw 201 are convenient for clamping the patient's patella to fix it, meeting the operation reduction requirement, at the same time, the guide channel formed by the coaxial communication of the first channel 301 and the second channel 302 is convenient for quickly hitting the Kirschner wire into the ideal position in the patient's patella, the hitting track is controllable, avoiding the damage to the patella bone caused by repeated multiple "blind hitting", and the operation efficiency is improved.
[0031] Specifically, the first jaw 101 can be one or more, and more can better hold the patella; there is a certain distance between the two second jaws 201, and the size of the distance depends on the distance size required to hit the two Kirschner wires into the ideal position during the operation; the first jaw 101 is arranged at a position that is not aligned with the guide channel, that is, the first jaw 101 is arranged at a position that does not affect the penetration of the two Kirschner wires.
[0032] In this embodiment, it also includes a first transition part 102, both ends of the first transition part 102 are connected to the first jaw 10 and the first jaw 101 respectively; it also includes a second transition part 203, both ends of the second transition part 203 are connected to the second jaw 20 and the second jaw 201 respectively, and the end of the second transition part 203 away from the first jaw 101 is connected with the guide cylinder 202.
[0033] In this embodiment, the cross section of the first jaw 101 in the direction away from the first jaw 10 gradually decreases, and the cross section of the second jaw 201 in the direction away from the second jaw 20 gradually decreases.
[0034] In the embodiment, the first handle 10 and the second handle 20 are further provided with a hand ring 70 at the other end; further, the hand ring 70 is provided with a flexible layer (not shown in the figure) at least in part, and the surface of the flexible layer is provided with a plurality of anti-skid stripes (not shown in the figure). The hand ring 70 is convenient for the operation of medical staff; the protective layer can protect the fingers of the medical staff from being worn and injured in the case of long-term operation; and the plurality of anti-skid stripes can prevent the hand ring 70 from being easily slipped when being held by the medical staff.
[0035] In the embodiment, a limiting device is arranged between the first handle 10 and the second handle 20, and the limiting device is used to maintain the size of the opening of the first handle 10 and the second handle 20.
[0036] In the embodiment, the limiting device comprises a first clamping tooth 401 and a second clamping tooth 402, the first clamping tooth 401 is arranged at the other end of the first handle 10, the second clamping tooth 402 is arranged at the other end of the second handle 20, and the first clamping tooth 401 and the second clamping tooth 402 are buckled to each other. Specifically, the first clamping tooth 401 and the second clamping tooth 402 are oppositely and staggeredly arranged, in use, the first clamping tooth 401 and the second clamping tooth 402 are separated to make the first handle 10 and the second handle 20 separated and rotatable, after use, the first handle 10 and the second handle 20 are limited by buckling the first clamping tooth 401 and the second clamping tooth 402, so that they cannot rotate any more, thereby being stored and placed. Meanwhile, in the operation, when the first clamping jaw 101 or the second clamping jaw 201 is rotated to a certain position, the first handle 10 and the second handle 20 need to be limited so as not to rotate any more, which is convenient for the doctor to put the Kirschner wire into the patella, and the first clamping tooth 401 and the second clamping tooth 402 can also be used for limiting and fixing. The limiting device of this type is very common in the field, and will not be described here.
[0037] Embodiment two
[0038] As shown in the figure, the difference between the embodiment and the embodiment one is that: Figures 4-7
[0039] In the embodiment, the mutual hinging mode of the first handle 10 and the second handle 20 is different from that of the embodiment one, when the one end of the first handle 10 and the second handle 20 is close to each other, the other end of the first handle 10 and the second handle 20 is away from each other; when the one end of the first handle 10 and the second handle 20 is away from each other, the other end of the first handle 10 and the second handle 20 is close to each other.
[0040] The limiting device comprises an arc-shaped rack 50 arranged at the other end of the first handle 10, the second handle 20 is provided with a fixed hole 601, the arc-shaped rack 50 is arranged to pass through the fixed hole 601 and move with the first handle 10, and the second handle 20 is further provided with a movable locking part 602, the locking part 602 is provided with a convex part 6021 engaged with the arc-shaped rack 50. Specifically, the arc-shaped rack 50 is fixedly arranged at the inner side of the other end of the first handle 10, the arc-shaped rack 50 passes through the fixed hole 601, the locking part 602 is arranged below the fixed hole 601, and the convex part 6021 is arranged at the top of the locking part 602 and engaged with the sawtooth at the bottom of the arc-shaped rack 50.
[0041] In the embodiment, the other end of the second handle 20 is provided with a containing cavity 603, the containing cavity 603 is provided with a sliding groove 604, the locking part 602 is provided with a sliding part 6022, the sliding part 6022 is movably arranged in the sliding groove 604, the sliding groove 604 is provided with an elastic part 605, and the elastic part 605 abuts against the sliding part 6022.
[0042] Specifically, the fixed hole 601 is communicated with the containing cavity 603, the sliding part 6022 is arranged at the bottom of the locking part 602, the elastic part 605 abuts against the bottom of the sliding part 6022, and the sliding part 6022 is abutted against the two side walls in the sliding groove 604, and the sliding part 6022 is slidably connected to the sliding groove 604.
[0043] When the locking part 602 is pressed down, the sliding part 6022 slides downward to exert a downward force on the elastic part 605, at this time, the convex part 6021 on the locking part 602 is away from the sawtooth of the arc-shaped rack 50 and is not engaged; when the pressing of the locking part 602 is stopped, the sliding part 6022 returns to the original position due to the elastic force of the spring, at this time, the convex part 6021 on the locking part 602 is re-engaged with the sawtooth of the arc-shaped rack 50.
[0044] In the embodiment, the locking part 602 is provided with a pressing part 6023, the sawtooth of the arc-shaped rack 50 is inclined to one side, and the convex part 6021 is adapted to the sawtooth. Specifically, the pressing part 6023 is arranged at one end of the locking part 602, and the pressing part 6023 is located outside the containing cavity 603; the sawtooth of the arc-shaped rack 50 can generally adopt a common upward sawtooth, the pressing part 6023 is pressed before the opening and closing guide, so that the convex part 6021 on the locking part 602 is away from the sawtooth of the arc-shaped rack 50 and is not engaged, then the distance between the first jaw 101 and the second jaw 201 is adjusted by moving the other end of the first handle 10 and the second handle 20, after adjustment, the pressing of the locking part 602 is stopped, and the convex part 6021 on the locking part 602 is re-engaged with the sawtooth of the arc-shaped rack 50.
[0045] However, in this embodiment, the serrations of the arc-shaped rack 50 are tilted to the left and the protrusion 6021 is tilted to the right (if it is the hinge method of embodiment 1, the serrations of the arc-shaped rack 50 are tilted to the right and the protrusion 6021 is tilted to the left). When the protrusion 6021 is stationary, and an attempt is made to manually move the arc-shaped rack 50 to the left, the serrations of the arc-shaped rack 50 are blocked by the protrusion 6021 and cannot move. In this case, the pressing part 6023 needs to be pressed first. In this way, if you want to widen the distance between the other ends of the first clamp 10 and the second clamp 20, or narrow the distance between the ends of the first clamp 10 and the second clamp 20 with the jaws, only medical personnel can actively press the pressing part 6023. Simply touching the other ends of the first clamp 10 and the second clamp 20 by accident will not make them move, thus ensuring safety. However, when the second clamp 20 is stationary, and the first clamp 10 is manually moved to the right, causing the arc-shaped rack 50 to move to the right as well, the serrations of the arc-shaped rack 50 slide over the protrusion 6021 with the force of moving to the right. Therefore, there is no need to press the pressing part 6023, and the first clamp 10 can be moved directly to the right to open the guide. Compared to ordinary non-tilted saw teeth, the saw teeth with teeth tilted to one side require pressing the pressing part 6023 when shortening the distance between the first jaw 101 and the second jaw 201, but do not require pressing when widening the distance between the first jaw 101 and the second jaw 201, thus ensuring both safety and convenience.
[0046] Except for the differences in the hinge method and the specific structure of the limiting device, the other contents of Embodiment 2 are the same as those of Embodiment 1.
[0047] The patellar reduction guide proposed in this utility model is used as follows:
[0048] After properly exposing the patella and clearing the fracture ends during the operation, the three-jaw locator of the reduction guide is used to clamp the superior and inferior poles of the patella (e.g., Figure 4 As shown, the entire reduction guide is used with the entire device facing downwards. The front end of the reduction guide clamps the patella, and the rear end of the reduction guide, which has a limiting device, is located at the upper end of the patella. Press the handle end, and the three claws gradually apply pressure to the fracture ends. Specifically, the first claw 101 is engaged with the anterior and posterior lateral edges of the midline of the superior pole of the patella, applying pressure; the two second claws 201 are engaged with the lateral edges of the midline of the inferior pole of the patella, applying pressure; the first handle 10 and the second handle 20 apply relative pressure to reduce the transverse patellar fracture (or the first claw 101 can clamp the inferior pole of the patella, and the second claw 201 can clamp the superior pole of the patella). When clamping the patella, the doctor needs to use their knowledge and experience to visually adjust the clamping end to the ideal position on the patella (so that the two Kirschner wires are about 5mm subcortical in the anterior part of the patella, parallel to each other in the coronal and sagittal planes within the bone). Then adjust the limiting device to complete the temporary reduction and fixation of the patellar fracture.
[0049] Finally, through two guide channels each hit 1 kirsch needle, facilitate doctor's subsequent other operation.
[0050] After use, first release the limiting device, then slowly loosen the first jaw 101, and finally the guide channel and the second jaw 201 are withdrawn.
[0051] The above examples are only for illustrating the technical concept and characteristics of the utility model, and the purpose is to enable the person skilled in the art to understand the utility model content and implement it, and it cannot limit the protection scope of the utility model. Any equivalent change or modification according to the spirit and essence of the utility model should be covered in the protection scope of the utility model.
Claims
1. A patellar reduction guide, characterized in that, It includes a first clamp handle and a second clamp handle that are hinged to each other. One end of the first clamp handle is provided with at least one first jaw, and one end of the second clamp handle is provided with two second jaws. The two second jaws are in the same direction and are opposite to the first jaws. One end of the second clamp handle is connected to a guide tube in a direction away from the first jaws. The second jaws and the guide tube are respectively provided with a first channel and a second channel. The first channel and the second channel are coaxially connected.
2. The patellar reduction guide as described in claim 1, characterized in that, It also includes a first transition section, the two ends of which are respectively connected to the first jaw and the first jaw; it also includes a second transition section, the two ends of which are respectively connected to the second jaw and the second jaw, and the guide tube is connected to the end of the second transition section away from the first jaw.
3. A patellar reduction guide as described in claim 1 or 2, characterized in that, The cross-section of the first jaw gradually decreases along the direction away from the first jaw handle, and the cross-section of the second jaw gradually decreases along the direction away from the second jaw handle.
4. The patellar reduction guide as described in claim 1, characterized in that, The first and second clamp handles are also provided with a hand ring at the other end.
5. The patellar reduction guide as described in claim 4, characterized in that, The handheld ring has a flexible layer at least in a portion of its area, and the surface of the flexible layer has several anti-slip stripes.
6. The patellar reduction guide as described in claim 1, characterized in that, A limiting device is provided between the first clamp handle and the second clamp handle, the limiting device being used to maintain the opening size of the first clamp handle and the second clamp handle.
7. The patellar reduction guide as described in claim 6, characterized in that, The limiting device includes a first engaging tooth and a second engaging tooth. The first engaging tooth is located at the other end of the first clamp handle, and the second engaging tooth is located at the other end of the second clamp handle. The first engaging tooth and the second engaging tooth engage with each other.
8. The patellar reduction guide as described in claim 6, characterized in that, The limiting device includes an arc-shaped rack, which is located at the other end of the first clamp handle. The second clamp handle has a fixing hole, and the arc-shaped rack passes through the fixing hole as the first clamp handle opens and closes. The second clamp handle also has a movable locking part, which has a protrusion that engages with the arc-shaped rack.
9. A patellar reduction guide as described in claim 8, characterized in that, The other end of the second clamp handle is provided with a receiving cavity, the receiving cavity is provided with a sliding groove, the locking part is provided with a sliding part, the sliding part is at least partially adapted to the sliding groove, the sliding groove is provided with an elastic part, and the elastic part abuts against the sliding part.
10. A patellar reduction guide as described in claim 9, characterized in that, The locking part is provided with a pressing part, the serrations of the arc-shaped toothed rack are inclined to one side, and the protrusion is adapted to the serrations.