Instrument for assisting resetting of external fixing frame
By designing an instrument for external fixation, which uses locking elements and slot structures to stabilize the Steinmann pin, the problem of difficulty in reducing fracture ends is solved, and stable holding and precise reduction of fracture ends are achieved.
Patent Information
- Application Number
- CN202511760006.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-27
- Publication Date
- 2026-02-10
AI Technical Summary
During external fixation, the fracture ends lack effective support on both sides, making reduction difficult.
An auxiliary device for external fixation reduction was designed, including a handle and a swing arm. The Steinmann pin is fixed by a locking device and a slot structure to achieve stable holding of the fracture ends, and the fracture is reduced by adjusting the position and angle of the swing arm.
It effectively reduced the fracture ends, simplified the operation of external fixators, and improved the efficiency and precision of fracture treatment.
Smart Images
Figure CN121489609A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of medical devices, and in particular to a device for assisting in the repositioning of external fixators. Background Technology
[0002] External fixation is a surgical procedure used to treat fractures and other orthopedic conditions. It involves fixing the fractured bone ends together by installing metal screws and connecting rods on the skin at the fracture site, creating a biomechanical environment conducive to fracture healing, bone remodeling, and bone lengthening, thus achieving the therapeutic goal. The procedure begins by determining the position of the external fixator and inserting Steinmann pins through the skin and soft tissue into the bone. The number and placement of the Steinmann pins are determined based on the patient's specific condition and the nature of the fracture. The connection between the external fixator and the Steinmann pins is then tightly secured, ensuring no loosening, and the angle of the external fixator is adjusted to the optimal position. The most crucial step is then the reduction of the fracture ends, adjusting the length and angle of the external fixator to restore them to their normal position. During this process, the surgeon must pay attention to the force lines, rotation, and length relationships between the fracture ends. However, at this pre-connection point between the Steinmann pins and the external fixator, although not completely locked, the lack of support on both sides of the fracture ends makes reduction difficult. Summary of the Invention
[0003] The technical problem to be solved by the present invention is to provide an instrument for assisting in the reduction of external fixation, which can hold the Steinmann pins on both sides of the fracture ends during external fixation surgery so as to reduce the fracture ends on both sides.
[0004] The present invention relates to an instrument for assisting in the repositioning of an external fixator, comprising a handle, wherein two opposing swing arms are rotatably mounted on the handle, and a first locking member is provided between each swing arm and the handle, the first locking member being capable of locking the relative position between the swing arm and the handle, and each swing arm being provided with a slot for accommodating a Stears needle, the slot being provided with a second locking member, the second locking member being capable of locking the Stears needle within the slot.
[0005] The present invention relates to an instrument for assisting in the repositioning of an external fixator, wherein the handle includes a first handle and two second handles, the two second handles being respectively fixedly connected to the two ends of the first handle, the first handle and the two second handles together forming a U-shaped structure, one end of each of the two swing arms being rotatably disposed at the end of the two second handles away from the first handle, and the other end of each of the two swing arms being provided with a slot.
[0006] This invention relates to an instrument for assisting in the repositioning of an external fixator. The second handle has a first disc at its end furthest from the first handle, and a second disc at one end of the swing arm. One surface of the second disc abuts against one surface of the first disc. The first locking element consists of a first bolt and a nut. The first bolt passes through the first and second discs and is threadedly connected to the nut. When the first locking element does not lock the first and second discs, the swing arm can rotate relative to the second handle via the first bolt. When the first locking element locks the first and second discs, the relative position of the swing arm and the second handle is locked.
[0007] The present invention relates to an instrument for assisting in the repositioning of an external fixator, wherein a first annular rack is provided on the surface of the first disc that abuts against the second disc, and a second annular rack is provided on the surface of the second disc that abuts against the first disc, and when the first disc and the second disc are locked by a first locking member, the first annular rack and the second annular rack mesh with each other.
[0008] The present invention relates to a device for assisting in the repositioning of an external fixator, wherein a retaining ring is fixedly provided at the other end of the swing arm, the retaining ring has an opening, the open retaining ring forms the retaining groove, the second locking member is a second bolt, and a threaded hole is provided on the ring wall of the retaining ring, the second bolt is threadedly connected to the threaded hole.
[0009] The present invention relates to an instrument for assisting in the repositioning of an external fixator, wherein the inner sidewall of the retaining ring is provided with an anti-slip pad.
[0010] The present invention relates to an instrument for assisting in the repositioning of an external fixator, wherein a gripping groove is provided on the side of the first handle near the second handle.
[0011] The present invention relates to an instrument for assisting in the repositioning of an external fixator, wherein the first handle and two second handles are all located in the same plane, and the axial directions of the first disc, the second disc, and the first bolt are all perpendicular to the plane in which the first handle and the two second handles are located.
[0012] The present invention relates to an instrument for assisting in the repositioning of an external fixator, wherein the axial direction of the retaining ring is perpendicular to the plane containing the first handle and the two second handles, and the axial direction of the second bolt is perpendicular to the axial direction of the retaining ring.
[0013] The present invention, used to assist in the reduction of external fixation devices, differs from existing technologies in that, for ease of explanation, the bones on both sides of the fracture ends are referred to as the first fracture and the second fracture. The first device's first arm has a slot that engages with a Stearns pin on the first fracture (or, one Stearns pin is secured in the slot). Then, both arms are rotated relative to the handle so that the slot on the other arm engages with another Stearns pin on the first fracture. Next, two first locking devices lock the relative positions of the two arms and the handle, and two second locking devices lock the two Stearns pins of the first fracture into their respective slots, thus fixing the first device to the two Stearns pins on the first fracture. The same method is then used to fix the second device to the two Stearns pins on the second fracture. In this way, the first device, the first fracture, and the two Stearns pins on the first fracture are fixed together, and the second device, the second fracture, and the two Stearns pins on the second fracture are also fixed together. The surgeon can then hold the handle of the first instrument with their left hand and the handle of the second instrument with their right hand, moving the first and second fracture bones respectively to reduce their positions. After reduction, the external fixator is secured to the Stokes pins on the two fracture bones. The instruments and Stokes pins are then unlocked, and finally, the instruments are removed. Thus, this invention allows for the holding of the Stokes pins on both sides of the fracture ends during external fixation surgery, facilitating the reduction of both fracture ends.
[0014] The invention will now be further described with reference to the accompanying drawings. Attached Figure Description
[0015] Figure 1 This is a front view of the device for assisting in the repositioning of an external fixator according to the present invention; Figure 2 This is a left view of the device for assisting in the repositioning of an external fixator according to the present invention; Figure 3 This is a front view of the handle in this invention; Figure 4 This is a front view of the swing arm in this invention; Figure 5 This is a diagram showing the usage state of the present invention.
[0016] Figure reference numerals: 01. Handle; 02. First handle; 03. Second handle; 04. Grip groove; 05. First bolt; 06. Second disc; 07. Swing arm; 08. Snap ring; 09. Second bolt; 10. First disc; 11. Nut; 12. First ring rack; 13. First through hole; 14. Second ring rack; 15. Second through hole; 16. First instrument; 17. Second instrument; 18. First fracture bone; 19. Second fracture bone; 20. Stokes needle. Detailed Implementation
[0017] like Figure 1 As shown, and in combination Figure 2-5 As shown, the present invention provides an instrument for assisting in the repositioning of an external fixator, comprising a handle 01, on which two opposing swing arms 07 are rotatably mounted. Each swing arm 07 and the handle 01 are provided with a first locking member, which locks the relative position between the swing arm 07 and the handle 01. Each swing arm 07 is provided with a slot for accommodating a Sterling needle 20, and a second locking member is provided on the slot, which locks the Sterling needle 20 in the slot.
[0018] like Figure 1 , 3 As shown, the present invention is an instrument for assisting in the repositioning of an external fixator. The handle 01 includes a first handle 02 and two second handles 03. The two second handles 03 are respectively fixedly connected to the two ends of the first handle 02. The first handle 02 and the two second handles 03 together form a U-shaped structure. One end of the two swing arms 07 is rotatably disposed at the end of the two second handles 03 away from the first handle 02. The other end of the two swing arms 07 is provided with a slot.
[0019] The first handle 02 and the two second handles 03 are integrally formed to form the handle 01. Since the two second handles 03 are arranged opposite each other, the two swing arms 07, each mounted on a second handle 03, are also arranged opposite each other. The first handle 02 is straight, and the second handles 03 are curved. The concave portions of the two second handles 03 are arranged opposite each other; that is, for any one second handle 03, its concave portion is closer to the other second handle 03, and its convex portion is farther away from the other second handle 03. This arrangement makes it easier for the operator to operate the handle 01.
[0020] like Figure 1-4 As shown, the present invention is an instrument for assisting in the repositioning of an external fixator. The second handle 03 has a first disc 10 at its end furthest from the first handle 02, and a second disc 06 at one end of the swing arm 07. One surface of the second disc 06 abuts against one surface of the first disc 10. The first locking element is a first bolt 05 and a nut 11. The first bolt 05 passes through the first disc 10 and the second disc 06 and is threadedly connected to the nut 11. When the first locking element does not lock the first disc 10 and the second disc 06, the swing arm 07 can rotate relative to the second handle 03 via the first bolt 05. When the first locking element locks the first disc 10 and the second disc 06, the relative position of the swing arm 07 and the second handle 03 is locked.
[0021] The first disk 10 and the second disk 06 are respectively provided with a first through hole 13 and a second through hole 15. The diameters of the first through hole 13 and the second through hole 15 are slightly larger than the screw diameter of the first bolt 05, but smaller than the head diameter of the first bolt 05. Figure 2 As shown, the screw of the first bolt 05 passes through the second through hole 15 of the second disc 06 and the first through hole 13 of the first disc 10 in sequence and is then threadedly connected to the nut 11.
[0022] When nut 11 is not tightened (at this time, nut 11 is threaded onto the first bolt 05, but not tightened), that is, when the first locking member does not lock the first disc 10 and the second disc 06, since the diameters of the first through hole 13 and the second through hole 15 are slightly larger than the screw diameter of the first bolt 05, the swing arm 07 is hinged to the second handle 03 via the first bolt 05. In other words, the first bolt 05 acts as a pin, allowing the swing arm 07 to rotate relative to the second handle 03. This achieves the aforementioned rotation of one end of the swing arm 07 to the end of the second handle 03 furthest from the first handle 02. The rotation of the swing arm 07 relative to the second handle 03 is also its rotation relative to the handle 01.
[0023] When nut 11 is tightened, that is, when the first locking member locks the first disc 10 and the second disc 06, the first disc 10 and the second disc 06 are locked between the head of nut 11 and the first bolt 05, and the two will not rotate relative to each other. That is, the first locking member locks the relative position of the swing arm 07 and the second handle 03, which means that the first locking member locks the relative position between the swing arm 07 and the handle 01.
[0024] Therefore, when the first locking element fails to lock the relative position between the swing arm 07 and the second handle 03, the swing arm 07 can be rotated relative to the second handle 03 to adjust the relative position between them. After the relative position is adjusted, tighten the nut 11 to lock the relative position between them, preventing them from rotating relative to each other.
[0025] like Figure 3 , 4 As shown, the present invention is an instrument for assisting in the repositioning of an external fixator. The first disc 10 has a first annular rack 12 arranged circumferentially on the disc surface that abuts against the second disc 06, and the second disc 06 has a second annular rack 14 arranged circumferentially on the disc surface that abuts against the first disc 10. When the first disc 10 and the second disc 06 are locked by the first locking member, the first annular rack 12 and the second annular rack 14 mesh with each other.
[0026] When nut 11 is not tightened, that is, when the first locking member is not locking the first disc 10 and the second disc 06, the first disc 10 and the second disc 06 can be separated, and the first annular rack 12 disengages from the second annular rack 14. At this time, the swing arm 07 can be rotated relative to the second handle 03. When the first disc 10 and the second disc 06 are locked by the first locking member, the first annular rack 12 and the second annular rack 14 mesh, which can further prevent relative rotation between the two discs, thereby making the relative position between the swing arm 07 and the second handle 03 more securely locked.
[0027] like Figure 1 , 4 As shown in Figure 5, the present invention provides an instrument for assisting in the repositioning of an external fixator. The other end of the swing arm 07 is fixedly provided with a retaining ring 08. The retaining ring 08 has an opening, forming the retaining groove. The second locking element is a second bolt 09. A threaded hole is formed on the ring wall of the retaining ring 08, and the second bolt 09 is threaded into the threaded hole. The opening on the retaining ring 08 is used to allow the S-pin 20 to pass through, so that the S-pin 20 can be engaged within the retaining ring 08, or in other words, to engage the retaining ring 08 with the S-pin 20. The second locking element is threaded into the retaining ring 08, thus achieving the purpose of providing a second locking element on the aforementioned retaining groove. After the Stokes pin 20 is engaged in the retaining ring 08, the second bolt 09 can be turned inwards into the retaining ring 08 until it is pressed against the Stokes pin 20. This engages the Stokes pin 20 between the second bolt 09 and the inner wall of the retaining ring 08, thus achieving the purpose of the second locking member in locking the Stokes pin 20 in the retaining groove. Turning the second bolt 09 outwards from the retaining ring 08 separates the second bolt 09 from the Stokes pin 20 inside the retaining ring 08, thereby detaching the Stokes pin 20 from the retaining ring 08 and unlocking them.
[0028] This invention relates to an instrument for assisting in the repositioning of an external fixator, wherein the inner wall of the retaining ring 08 is provided with an anti-slip pad. The anti-slip pad prevents the Stryker needle 20 from sliding axially within the retaining ring 08, thus allowing the second bolt 09 to more securely lock the Stryker needle 20 within the retaining ring 08. Furthermore, the anti-slip pad also protects the Stryker needle 20, preventing damage when the retaining ring 08 clamps it.
[0029] like Figure 1 , 3As shown, the present invention provides an instrument for assisting in the repositioning of an external fixator, wherein a grip groove 04 is provided on the side of the first handle 02 near the second handle 03. The grip groove 04 is located between the two second handles 03. When the surgeon grips the handle 01, they are specifically gripping the first handle 02, with their palm resting against the side of the first handle 02 away from the second handle 03, and their fingers wrapping around the first handle 02 to grip the grip groove 04. In other words, the grip groove 04 facilitates the surgeon's gripping of the first handle 02.
[0030] like Figure 1-4 As shown, this invention relates to an instrument for assisting in the repositioning of an external fixator, wherein the first handle 02 and the two second handles 03 are all located in the same plane, and the axial directions of the first disc 10, the second disc 06, and the first bolt 05 are all perpendicular to the plane containing the first handle 02 and the two second handles 03. The axial direction of the retaining ring 08 is perpendicular to the plane containing the first handle 02 and the two second handles 03, and the axial direction of the second bolt 09 is perpendicular to the axial direction of the retaining ring 08.
[0031] Since the axes of the first disc 10, the second disc 06, and the first bolt 05 are all perpendicular to the plane where the first and second handles are located, the swing arm 07 rotates in the aforementioned plane, or the plane formed by the rotation of the swing arm 07 is parallel to the plane where the first and second handles are located.
[0032] When the Stokes pin 20 is engaged within the retaining ring 08, the Stokes pin 20 and the retaining ring 08 are coaxial. Since the axis of the retaining ring 08 is perpendicular to the plane containing the first and second handles, the Stokes pin 20 is also perpendicular to the plane containing the first and second handles. Because the axis of the second bolt 09 is perpendicular to the axis of the retaining ring 08, and the Stokes pin 20 is coaxial with the retaining ring 08, the second bolt 09 is also perpendicular to the Stokes pin 20. Thus, the second bolt 09 can abut against the Stokes pin 20 and lock it in place, or rather, secure it within the retaining ring 08.
[0033] like Figure 5As shown, the device for assisting in the reduction of external fixation in this invention differs from the prior art in that, for ease of explanation, the bones on both sides of the fracture ends are referred to as the first fracture bone 18 and the second fracture bone 19. The slot (i.e., the retaining ring 08) on one of the swing arms 07 of the first device 16 is engaged with a Stearns pin 20 of the first fracture bone 18 (or, one Stearns pin 20 is engaged in the slot). Then, both swing arms 07 are rotated relative to the handle 01 so that the slot on the other swing arm 07 engages with another Stearns pin 20 of the first fracture bone 18. Then, the device is further processed by two… The first locking element locks the relative positions between the two swing arms 07 and the handle 01 by tightening the two nuts 11. Then, the two second locking elements lock the two Stokes pins 20 of the first fracture bone 18 into the two slots by tightening the two second bolts 09. This completes the fixation of the first instrument 16 to the two Stokes pins 20 on the first fracture bone 18. The same method is then used to fix the second instrument 17 to the two Stokes pins 20 on the second fracture bone 19. In this way, the first instrument 16, the first fracture bone 18, and the two Stokes pins 20 on the first fracture bone 18 are fixed together, and the second instrument 17, the second fracture bone 19, and the two Stokes pins 20 on the second fracture bone 19 are also fixed together. Afterwards, the surgeon can hold the handle 01 of the first instrument 16 with their left hand and the handle 01 of the second instrument 17 with their right hand, and move the first fracture 18 and the second fracture 19 respectively to reduce their positions. After reduction, the external fixator is then fixed to the Stearns pins 20 on the two fractures. Then, the two instruments are unlocked from the Stearns pins 20. Specifically, for each instrument, the second bolt 09 is loosened outward from the clasp 08 to separate the second bolt 09 from the Stearns pin 20 inside the clasp 08. The Stearns pin 20 is then disengaged from the clasp 08, thus unlocking the instruments. Finally, the instruments are removed. Therefore, this invention allows for the holding of the Stearns pins 20 on both sides of the fracture ends during external fixation surgery, facilitating the reduction of the fracture ends.
[0034] During external fixation, both the first fracture 18 and the second fracture 19 are fitted with Steiner pins 20. The number of Steiner pins 20 on each fracture can be determined based on the actual surgical situation. The first instrument 16 is fixed to two Steiner pins 20 on the first fracture 18 (these two Steiner pins 20 can be selected based on the actual surgical situation; different Steiner pins 20 will result in different rotation angles of the swing arm 07 of the first instrument 16 relative to the handle 01). The second instrument 17 is fixed to two Steiner pins 20 on the second fracture 19 (these two Steiner pins 20 can be selected based on the actual surgical situation; different Steiner pins 20 will result in different rotation angles of the swing arm 07 of the second instrument 17 relative to the handle 01). By holding the two instruments, the two fractures are adjusted for reduction, i.e., reduction of rotational deformities, separation deformities, or shortening deformities of the two fractures. After reduction, the external fixator is fixed to the Steiner pins 20, and then the two instruments are removed.
[0035] It should be noted that the terms "center", "upper", "lower", "front", "rear", "left", "right", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.
[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0037] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims
1. A device for assisting in the repositioning of an external fixator, characterized in that: The device includes a handle with two opposing swing arms rotatably mounted on it. Each swing arm and the handle are provided with a first locking member, which locks the relative position between the swing arm and the handle. Each swing arm is provided with a slot for receiving a Stokes needle, and the slot is provided with a second locking member, which locks the Stokes needle in the slot.
2. The device for assisting in the repositioning of an external fixator according to claim 1, characterized in that: The handle includes a first handle and two second handles. The two second handles are respectively fixedly connected to the two ends of the first handle. The first handle and the two second handles together form a U-shaped structure. One end of each of the two swing arms is rotatably located at the end of the two second handles away from the first handle. The other end of each of the two swing arms is provided with a slot.
3. The device for assisting in the repositioning of an external fixator according to claim 2, characterized in that: The second handle has a first disc at the end furthest from the first handle, and the swing arm has a second disc at one end. One surface of the second disc abuts against one surface of the first disc. The first locking element is a first bolt and a nut. The first bolt passes through the first and second discs and is threadedly connected to the nut. When the first locking element does not lock the first and second discs, the swing arm can rotate relative to the second handle via the first bolt. When the first locking element locks the first and second discs, the relative position of the swing arm and the second handle is locked.
4. The device for assisting in the repositioning of an external fixator according to claim 3, characterized in that: The first disk has a first annular toothed rack arranged in a circumferential direction on the disk surface that abuts against the second disk, and the second disk has a second annular toothed rack arranged in a circumferential direction on the disk surface that abuts against the first disk. When the first disk and the second disk are locked by the first locking member, the first annular toothed rack and the second annular toothed rack mesh with each other.
5. The device for assisting in the repositioning of an external fixator according to claim 4, characterized in that: The other end of the swing arm is fixedly provided with a retaining ring, which has an opening and forms the retaining groove. The second locking element is a second bolt. The retaining ring has a threaded hole on its ring wall, and the second bolt is threaded into the threaded hole.
6. The device for assisting in the repositioning of an external fixator according to claim 5, characterized in that: The inner wall of the retaining ring is provided with an anti-slip pad.
7. The device for assisting in the repositioning of an external fixator according to claim 6, characterized in that: The first handle has a grip groove on the side near the second handle.
8. The device for assisting in the repositioning of an external fixator according to claim 7, characterized in that: The first handle and the two second handles are all located in the same plane, and the axial directions of the first disk, the second disk and the first bolt are all perpendicular to the plane in which the first handle and the two second handles are located.
9. The device for assisting in the repositioning of an external fixator according to claim 8, characterized in that: The axial direction of the retaining ring is perpendicular to the plane containing the first handle and the two second handles, and the axial direction of the second bolt is perpendicular to the axial direction of the retaining ring.