Bone tunnel positioner
By designing an adjustable bone tractor, the problems of low drilling stability and unadjustable guide arm span in the prior art are solved, and the effects of reducing drilling air and improving stability are achieved.
Patent Information
- Application Number
- CN202421289814.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-06-06
AI Technical Summary
During the establishment of the bone duct, the drilling needle needs to go more air travel, resulting in reduced drilling stability and the span of the guide arm cannot be adjusted according to actual needs.
A bone locator is designed, including a handle, a first support arm, a second support arm, a positioning hole, a support tube, a guide tube and a drilling member. By adjusting the distance between the first support arm and the second support arm, the span of the guide arm is increased, the empty space of the drilling member before drilling into the bone is reduced, and the drilling depth and the position of the guide tube are adjusted through the coordination of the limit ring and screw.
By adjusting the span of the guide arm and drilling depth, the empty space of the drilled part before drilling into the bones is reduced, the stability of the drilled part is improved, the positioning accuracy is enhanced, the operation is simplified and the surgical time is shortened.
Smart Images
Figure CN222870576U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical equipment, in particular to a bone channel locator. Background Art
[0002] Posterior cruciate ligament injury is a common knee injury. When the posterior cruciate ligament is injured, arthroscopic reconstruction of the posterior cruciate ligament is required. In the prior art, the posterior cruciate ligament stump is first cleaned, and a locator is used to establish a bone tunnel for the autologous graft to pass through the tibia and femur. In the process of establishing the bone tunnel, a tibial sight is first required to locate the guide needle, and then a hollow drill is drilled through the bone tunnel along the direction of the guide needle. At the same time, a posterior medial approach observation channel is added to prevent the guide needle and drill bit from drilling through the cortex and continuing to move forward to damage important blood vessels and nerves behind the knee.
[0003] There is a tibial bone tunnel locator for arthroscopic reconstruction of the posterior cruciate ligament. It includes an aiming arm, a handle, a guide sleeve, a hollow drill bit, a depth stopper, a displacement sensor and a display screen. The front end of the aiming arm is a positioning hook, the lower end of the positioning hook is a fork-shaped structure, the rear end of the aiming arm is connected to the handle, the handle is provided with a dovetail groove, a locking screw, a guide hole and a displacement sensor, the dovetail groove cooperates with the aiming arm, the aiming arm can slide and retract along the dovetail groove, the position of the aiming point always remains unchanged, the aiming arm is fixed to the handle, the guide hole is provided below the handle, the aiming point is located on the axis of the guide hole, the guide hole cooperates with the hollow drill bit, the displacement sensor is located below the handle, and the sensor is connected to the display. Combining the displacement sensor technology with the locator avoids the need to open a traditional auxiliary posterior internal approach, reduces trauma, omits the guide needle drilling step, accurately positions to ensure safety, and is simple to operate to shorten the operation time.
[0004] This locator has a similar structure to the guide arm (aiming arm) used in common locators, both of which adopt an integrated fixed structure. The span is not adjustable, that is, the distance between the distal end of the guide arm and the handle cannot be adjusted. Therefore, it cannot be adjusted and used according to actual needs, resulting in the drill needle (drill bit) having to travel a longer idle distance before drilling into the bone. At the same time, due to the large span, the stability of the drill needle (drill bit) is reduced when drilling.
[0005] Therefore, it is necessary to provide a bone channel locator to solve the above technical problems. Utility Model Content
[0006] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a bone channel locator that can reduce drilling idle stroke and improve drilling stability.
[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0008] The bone channel locator includes: a handle, a first support arm is plugged and installed on the handle, a second support arm is plugged and installed at one end of the first support arm, the first support arm and the second support arm are used as guide arms of the locator, a positioning hole is opened at the distal end of the second support arm, a support tube is fixedly installed at one end of the handle, a guide tube is installed in the support tube, a drilling member is arranged in the guide tube, the drilling member is a drill needle or a drill bit, the diameter is selected according to the drilling needs, and is adapted to the guide tube, and the central axis of the drilling member is aligned with the positioning hole, the second support arm and the first support arm can be pulled out a certain length in a direction parallel to the drilling member, thereby increasing the distance between the positioning hole and the bottom end of the handle, that is, increasing the span of the guide arm, for this purpose, a second mounting groove is opened at the end of the first support arm and is translated to the support tube, the end of the second support arm is inserted into the second mounting groove, a second screw is threadedly installed on the first support arm, the end of the second screw extends into the second mounting groove and is tightly pressed on the second support arm.
[0009] Preferably, an arc-shaped first mounting groove is opened in the handle, one end of the first support arm is inserted into the first mounting groove, and a first screw is installed on the inner side of the handle, the end of the first screw extends into the first mounting groove and is tightly pressed on the first support arm.
[0010] Preferably, a limit ring is installed on the drilling member, a fourth screw is installed on the limit ring, and the end of the fourth screw extends into the ring and is tightly pressed on the drilling member.
[0011] Preferably, a third screw is installed on the support tube, and the end of the third screw extends into the tube and is tightly pressed on the guide tube.
[0012] Preferably, a plurality of positioning heads arranged in a circular array are mounted on the second support arm, and the plurality of positioning heads are arranged with the positioning hole as the center.
[0013] Preferably, a guide hole is axially opened in the guide tube, and the diameter of the guide hole is set according to the outer diameter of the drilling component, so that when the drilling component is inserted into the guide hole, the clearance between the two is appropriately matched, and a ruler is provided on the surface of the guide tube.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] (1) The utility model can conveniently adjust the distance between the first support arm and the second support arm by providing a handle, a first support arm, a second support arm, a positioning hole, a support tube, a guide tube, a drilling member, a second mounting slot and a second screw, so as to facilitate the insertion of bones, facilitate the adjustment of the distance between the guide tube and the bone, reduce the idle travel of the drilling member before drilling into the bone, and improve the stability of the drilling member;
[0016] (2) The utility model can conveniently adjust the overall arch height of the first support arm and the second support arm by arranging the first mounting groove and the first screw on the handle, so as to facilitate the insertion of the bone;
[0017] (3) The utility model can conveniently adjust the drilling depth and prevent overtravel by installing a limit ring and a fourth screw on the drilling member;
[0018] (4) The utility model can conveniently fix the guide tube in the support tube by installing a third screw on the support tube;
[0019] (5) The utility model can conveniently control the distance between the end of the guide tube and the positioning hole by providing a guide hole and a ruler on the guide tube;
[0020] (6) The utility model can facilitate the second support arm to grasp and fix on the bone surface by installing a plurality of positioning heads surrounding the positioning holes on the second support arm, so that the positioning holes are aligned with the openings of the bones. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 A schematic diagram of the structure of the bone channel locator provided by the utility model;
[0022] Figure 2 for Figure 1 A schematic diagram of the structure of the guide tube in the bone tunnel locator is shown.
[0023] Among them, the names corresponding to the figure marks are: 1-handle, 2-first support arm, 3-second support arm, 4-positioning hole, 5-support tube, 6-guide tube, 7-drilling member, 8-first mounting groove, 9-first screw, 10-second mounting groove, 11-second screw, 12-third screw, 13-limiting ring, 14-fourth screw, 15-guide hole, 16-ruler, 17-positioning head. DETAILED DESCRIPTION
[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The present invention includes but is not limited to the following embodiments.
[0025] Embodiment 1:
[0026] like Figure 1As shown, the bone channel locator provided by the utility model comprises: a handle 1, a first support arm 2 is plugged and installed on the handle 1, a second support arm 3 is plugged and installed at one end of the first support arm 2, the first support arm 2 and the second support arm 3 are used as guide arms of the locator, a positioning hole 4 is opened at the distal end of the second support arm 3, a support tube 5 is fixedly installed at one end of the handle 1, a guide tube 6 is installed in the support tube 5, a drilling member 7 is arranged in the guide tube 6, the drilling member 7 is a drill needle or a drill bit with a diameter of 2.5-9 mm, which is adapted to the guide tube 6, And the central axis of the drilling member 7 is aligned with the positioning hole 4, the second support arm 3 and the first support arm 2 can be pulled out a certain length in a direction parallel to the drilling member 7, thereby increasing the distance between the positioning hole 4 and the bottom end of the handle 1, that is, increasing the span of the guide arm. To this end, a second mounting groove 10 is opened at the end of the first support arm 2 and is translated to the support tube 5. The end of the second support arm 3 is inserted into the second mounting groove 10, and a second screw 11 is threadedly installed on the first support arm 2. The end of the second screw 11 extends into the second mounting groove 10 and is pressed tightly against the first When in use, first, select a drilling member 7 of a suitable diameter and a matching guide tube 6, install the guide tube 6 in the support tube 5, loosen the second screw 11, and close the positioning hole 4 to the outlet side of the bone drilling hole. Pull out the second support wall 3 from the second mounting groove 10 to separate the first support arm 2 and the second support arm 3, so that the first support arm 2 and the second support arm 3 as guide arms can facilitate the insertion of bones (such as tibia). When the positioning hole 4 and the connection to the guide tube 6 are aligned with the preset opening direction, the second support wall 3 is pulled out of the second mounting groove 10 to separate the first support arm 2 and the second support arm 3. When drilling, keep the second support arm 3 on the side of the positioning hole 4 unchanged, push the handle 1 toward the side of the positioning hole 4, and move the second support arm 3 into the second mounting groove 10 until there is a small gap between the guide tube 6 and the bone surface (the gap is preferably 3-5mm), which can facilitate the discharge of debris generated by drilling, and then tighten the second screw 11 to connect and fix the first support arm 2 and the second support arm 3, send the drilling member 7 into the guide tube 6, hold the handle 1, and use an electric tool to drive the drilling member 7 to rotate to drill the bone.
[0027] By setting the handle 1, the first support arm 2, the second support arm 3, the positioning hole 4, the support tube 5, the guide tube 6, the drilling member 7, the second mounting groove 10 and the second screw 11, the distance between the first support arm 2 and the second support arm 3 can be conveniently adjusted to facilitate the insertion of the bone, and the distance between the guide tube 6 and the bone can be adjusted to reduce the idle travel of the drilling member 7 before drilling into the bone, thereby improving the stability of the drilling member 7.
[0028] Embodiment 2:
[0029] like Figure 1As shown, an arc-shaped first mounting groove 8 is opened in the handle 1, one end of the first support arm 2 is inserted into the first mounting groove 8, and a first screw 9 is installed on the inner side of the handle 1, the end of the first screw extends into the first mounting groove 8 and is pressed tightly on the first support arm 2. When in use, the first support arm 2 is pulled out of the first mounting groove 8 for a certain length, and then the first screw 9 is tightened to adjust the overall arch height of the first support arm 2 and the second support arm 3, so as to facilitate the insertion of bones. It is worth noting that due to the increase in the span of the first support arm 2 and the second support arm 3, the positioning hole 4 will have a certain offset, and the offset value increases with the increase in the span. When the span does not exceed a certain range, the offset of the positioning hole 4 is small and will not affect the normal use of the device.
[0030] By arranging the first mounting groove 8 and the first screw 9 on the handle 1, the overall arch height of the first support arm 2 and the second support arm 3 can be easily adjusted, so as to facilitate the insertion of bones.
[0031] Embodiment 3:
[0032] like Figure 1 As shown, a limit ring 13 is installed on the drilling member 7, and a fourth screw 14 is installed on the limit ring 13. The end of the fourth screw 14 extends into the ring and is pressed against the drilling member 7. When in use, according to the required drilling depth, the end of the drilling member 7 is pressed against the positioning hole 4, and the limit ring 13 is pushed to slide on the drilling member 7, so that the limit ring 13 is close to the outer end of the guide tube 6, and then the fourth screw 14 is tightened, thereby adjusting the drilling depth of the drilling member 7 to prevent it from overtravel. This adjustment process should be completed before the device is installed.
[0033] By installing the limit ring 13 and the fourth screw 14 on the drilling member 7, the drilling depth can be easily adjusted to prevent overtravel.
[0034] Embodiment 4:
[0035] like Figure 1 As shown, a third screw 12 is installed on the support tube 5, and the end of the third screw 12 extends into the tube and is pressed tightly against the guide tube 6. When in use, the guide tube 6 is inserted into the support tube 5 and the third screw 12 is tightened to fix the guide tube 6 in the support tube 5.
[0036] By installing the third screw 12 on the support tube 5 , the guide tube 6 can be conveniently fixed inside the support tube 5 .
[0037] Embodiment 5:
[0038] like Figure 2As shown, a guide hole 15 is axially opened in the guide tube 6. The diameter of the guide hole 15 is opened according to the outer diameter of the drilling member 7, so that when the drilling member 7 is inserted into the guide hole 15, the clearance between the two is appropriately matched. A scale 16 is provided on the surface of the guide tube 6. When in use, the protruding length of the inner end portion of the guide tube 6 after being inserted into the support tube 5 (the end close to the positioning hole 4) can be controlled according to actual needs, and the protruding length can be read by the scale 16 to facilitate precision control.
[0039] By providing the guide hole 15 and the scale 16 on the guide tube 6 , the distance between the end of the guide tube 6 and the positioning hole 4 can be conveniently controlled.
[0040] Embodiment 6:
[0041] like Figure 1 As shown, a plurality of positioning heads 17 arranged in a circular array are mounted on the second support arm 3. The plurality of positioning heads 17 are arranged with the positioning hole 4 as the center. When in use, the tip of the positioning head 17 grasps the bone (tibia) to align the positioning hole 4 with the outlet of the opening.
[0042] By installing a plurality of positioning heads 17 surrounding the positioning holes 4 on the second support arm 3, it is possible to facilitate the second support arm 3 to be gripped and fixed on the bone surface so that the positioning holes 4 are aligned with the bone openings.
[0043] Working principle: When in use, first, select a drilling member 7 of suitable diameter and a corresponding guide tube 6, install the guide tube 6 in the support tube 5, loosen the second screw 11, and make the positioning hole 4 close to the outlet side of the bone drilling, and pull the second support wall 3 out of the second mounting groove 10, so that the first support arm 2 and the second support arm 3 are separated, so that the first support arm 2 and the second support arm 3 as guide arms can facilitate the insertion of bones (such as tibia). When the positioning hole 4 and the connection to the guide tube 6 are consistent with the preset hole opening direction, keep the second support arm 3 on the side of the positioning hole 4 stationary, push the handle 1 toward the side of the positioning hole 4, and move the second support arm 3 into the second mounting groove 10 until there is a small gap between the guide tube 6 and the bone surface. The gap should be able to facilitate the discharge of debris generated by drilling, and then tighten the second screw 11 to fix the connection between the first support arm 2 and the second support arm 3, send the drilling member 7 into the guide tube 6, hold the handle 1, and use an electric tool to drive the drilling member 7 to rotate to drill the bone.
Claims
1. A bone channel locator, characterized in that: include: A handle (1), wherein a first support arm (2) is mounted on the handle (1), a second support arm (3) is mounted on one end of the first support arm (2), a positioning hole (4) is provided on one end of the second support arm (3), a support tube (5) is mounted on one end of the handle (1), a guide tube (6) is mounted in the support tube (5), a drilling member (7) is provided in the guide tube (6), a second mounting groove (10) is provided at the end of the first support arm (2), an end of the second support arm (3) is inserted into the second mounting groove (10), a second screw (11) is mounted on the first support arm (2), and the end of the second screw (11) is pressed tightly against the second support arm (3).
2. A bone channel locator according to claim 1, characterized in that: The handle (1) is provided with an arc-shaped first installation groove (8), one end of the first support arm (2) is inserted into the first installation groove (8), and a first screw (9) is installed on the inner side of the handle (1), and the end of the first screw (9) is tightly pressed on the first support arm (2).
3. A bone channel locator according to claim 1, characterized in that: A limit ring (13) is installed on the drilling member (7), a fourth screw (14) is installed on the limit ring (13), and the end of the fourth screw (14) is tightly pressed on the drilling member (7).
4. A bone channel locator according to claim 1, characterized in that: A third screw (12) is installed on the support tube (5), and the end of the third screw (12) is tightly pressed on the guide tube (6).
5. The bone channel locator according to claim 1, characterized in that: A guide hole (15) is provided in the guide tube (6), and a scale (16) is provided on the guide tube (6).
6. The bone channel locator according to claim 1, characterized in that: A plurality of positioning heads (17) are mounted in a ring shape on the second support arm (3) with the positioning hole (4) as the center.