Navigation handle capable of conveniently operating reset nail

Abstract

The utility model discloses a navigation handle convenient to operate a reduction nail, the reduction nail comprises an insertion part and a central rod which are connected, the navigation handle comprises an operation handle, a hole channel with a non-circular cross section is arranged in the operation handle, the shape of the hole channel is consistent with that of the central rod, the operation handle is sleeved on the outer side of the central rod, and a locking structure is arranged in the hole channel. Comprising a locking threaded rod and a locking cap, a locking threaded hole corresponding to the locking rod is formed in the center rod, the locking threaded rod is combined with the locking threaded hole, and the operating handle is locked on the center rod by rotating the locking cap; and the reference frame setting rod extends out of the operating handle and is used for setting a patient reference frame. The operation handle is held by hand to complete the resetting action, and the position change of the broken bone is known under the tracking action of the navigation system. The patient reference frame is arranged on the handle, so that resetting and tracking can be performed synchronously, and the resetting operation space is effectively saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical instruments, in particular to the field of surgical navigation instruments, and specifically is a navigation handle for convenient operation of reduction nails. Background Art

[0002] Currently, many surgeries are performed using navigation systems to ensure the accuracy of the surgical process. This is especially true for fracture surgeries of long bones such as the femur and humerus. Because the entry direction and angle of each instrument are extremely dependent on the doctor's experience, the surgery is difficult and prone to reduction deviations, resulting in poor patient recovery.

[0003] In the prior art, the patient reference frame fixed to the patient plays the role of assisting in tracking the patient's surgical position by being recognized by the navigation system and displayed in the imaging system. In the case of long bone fractures, because there are two broken bones, two corresponding patient reference frames are required to ensure accurate tracking. If the above method is still used, the patient reference frame will occupy space, affecting the operator's manual reduction operations.

[0004] How to find an effective way to achieve navigation reset operation in a space-saving manner is the key to solving the above problems. The utility model provides a navigation handle that is convenient for operating the reset pin around the above problems. Utility Model Content

[0005] When using a reduction pin comprising an insert and an operating grip to reduce a fractured bone, a patient reference frame identified by a navigation system must be coupled to the reduction pin. This combination of the two allows for navigational surgery on long bone fractures, effectively reducing the space required for instruments during reduction. This utility model addresses the issue of how to combine the patient reference frame with the reduction pin.

[0006] A navigation handle for convenient operation of a reduction nail, the reduction nail comprises an insertion portion and a central rod connected thereto, the navigation handle comprises

[0007] An operating handle is provided inside the operating handle, and a non-circular hole with the same cross section as the center rod is provided. The operating handle is sleeved on the outside of the center rod.

[0008] The locking structure includes a locking threaded rod and a locking cap. A locking threaded hole corresponding to the locking rod is provided on the center rod. The locking threaded rod and the locking threaded hole are combined. The locking cap is rotated to lock the operating handle on the center rod.

[0009] The reference frame setting rod extends from the operating handle and is used to set the patient reference frame.

[0010] When in use, first put the operating handle on the center rod, rotate the locking cap to lock the operating handle on the center rod, then set the patient reference frame on the reference frame setting rod, and then insert the insertion part into the broken bone of the long bone. Complete the reduction action by holding the operating handle by hand, and understand the position changes of the broken bone under the tracking action of the navigation system.

[0011] Furthermore, the reference frame setting rod is arranged perpendicular to the central axis of the operating handle. This arrangement facilitates the reference frame setting rod to extend through the gap between the gripping fingers, and avoids the tilted setting affecting the hand gripping operation.

[0012] Furthermore, a hard tube is provided in the center of the operating handle, a hand-held sleeve with good friction is provided outside the hard tube, and blocking disks are provided at both ends of the hard tube to prevent the rubber sleeve from sliding; and one of the blocking disks is a detachable blocking disk, which facilitates the setting of the hand-held sleeve and can effectively reduce the overall size of the device; in addition, the detachable blocking disk is provided to facilitate the removal of the blocking disk for the setting of the hand-held sleeve; or the hand-held sleeve is a structure with a longitudinal through-slit, and the hand-held sleeve is elastically pulled open and connected to the hard tube. The hand-held sleeve is made of rubber or soft silicone material. Under the above settings, it is still necessary to consider the non-3D printing method.

[0013] Furthermore, how to set the operating reference frame on the operating handle; the specific setting method is to set a setting hole on the hand-held sleeve that exceeds the non-circular cross-section and penetrates to the edge of the handle, and correspondingly set a combination block that is combined with the setting hole; a channel for the hard tube to pass through is set on the combination block, and the combination block is made of high-strength material. The combination block and the setting hole are combined to form a smooth hand-held sleeve; a reference frame setting rod extends from the combination block, and the setting hole is set in the middle of the hand-held sleeve; the assembly method of the operating handle is to first set the combination block in the combination hole, remove the blocking disk at one end of the hard tube, insert the hard tube into the assembled hand-held sleeve, and then install the removed blocking disk, thus completing the assembly of the operating handle; after the assembly of the operating handle is completed, it is sleeved on the center rod, and then the operating handle is locked in the appropriate position by rotating the locking cap.

[0014] Furthermore, the bottom surface of the combination block is a rectangular surface, and the corresponding hole is also a rectangular surface. The combination of the two rectangular surfaces can prevent the combination block from shaking after assembly, thereby ensuring the stability of the patient reference frame position.

[0015] Furthermore, the non-circular shape is a quadrilateral, further a square, and each corner of the square is rounded.

[0016] Furthermore, a limiting structure is provided between the central rod and the insertion portion, wherein a limiting ring extends outward from the central rod or the insertion portion, and the limiting structure includes a limiting plane, and the operating handle is limited above the limiting plane. This arrangement can effectively fix the operating handle in an accurate position.

[0017] Furthermore, in order to meet the hand holding length requirement, the length of the center rod part is 10-15 cm. This distance setting can facilitate the hand holding operation.

[0018] Furthermore, to prevent the operator from interfering with the operating area during operation, the operating grip is guided into an area away from the skin by the insertion portion. The length of the insertion portion is set to 10-15 cm, which ensures that it can be inserted through the body surface while also being away from the skin to ensure easy insertion of the anti-rotation nail.

[0019] Technical Effects

[0020] The use of reduction nails to complete the reduction of long bone fractures can effectively save the operating space when directly operating the leg for reduction;

[0021] By effectively setting the patient reference frame on the operating handle and designing the locking structure and non-circular hole through the locking structure, the patient reference frame can be effectively and firmly set on the reset pin without any relative position change with the reset pin, thereby ensuring the accuracy of navigation system tracking. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the navigation handle of the utility model;

[0023] Figure 2 This is a schematic diagram of the combined structure of the navigation handle, reset pin and anti-rotation structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the combined structure of the locking cap and the locking threaded rod of the utility model;

[0025] Figure 4 This is a schematic diagram of the longitudinal cross-sectional structure of the combination of the locking cap, the locking threaded rod and the reset pin of the utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the handheld sleeve of the utility model;

[0027] Figure 6 This is a schematic diagram of the combined structure of the combination block and the hard pipe of the utility model;

[0028] Figure 7 This is a schematic diagram of the structure of the reset nail of the utility model;

[0029] Figure 8 This is a schematic diagram of the reset pin structure highlighting the limiting plane of the utility model;

[0030] Figure 9 This is a schematic diagram of the structure of the thread tip section of the utility model;

[0031] Figure 10 This is a schematic diagram of the anti-rotation nail structure of the utility model;

[0032] Figure 11 This is a partially enlarged structural diagram of the arc-shaped protrusion and arc-shaped recess combination of the present invention;

[0033] Figure 12 This is a schematic diagram of the structure of the reduction device of the utility model, which is composed of a navigation handle, a reduction pin, an anti-rotation structure and a patient reference frame;

[0034] Description of main reference numerals

[0035] 11. Insertion part; 111. Threaded tip section; 112. Insertion rod section; 113. Depth limit plane; 12. Operation part; 121. Center rod; 122. Operation handle; 1211. Hard tube; 1212. Blocking disk; 1213. Hand-held sleeve; 1214. Setting hole; 1215. Combination block; 1216. Rectangular surface; 123. Limiting structure; 1231. Limiting plane; 124. Channel with non-circular cross section; 21. Locking threaded rod; 22. Locking cap; 23. Locking threaded hole; 3. Patient reference frame; 4. Anti-rotation structure; 41. Anti-rotation pin; 411. Depth limit cap; 42. Plate-shaped structure; 421. Pin hole; 51. Arc-shaped protrusion; 52. Arc-shaped recess; 61. Reference frame setting plate; 62. Reference frame setting rod. DETAILED DESCRIPTION

[0036] Example 1 A navigation handle for convenient operation of the reduction pin

[0037] refer to Figure 1-7 and Figure 12 A navigation handle for convenient operation of a reduction pin includes an insertion portion 11 and a central rod 121 connected thereto. The navigation handle includes an operating handle 122, within which is disposed a non-circular channel 124 having a shape consistent with the central rod 121. The operating handle 122 is sleeved onto the outer side of the central rod 121. A locking structure includes a locking threaded rod 21 and a locking cap 22. The central rod 121 is provided with a locking threaded hole 23 corresponding to the locking rod. The locking threaded rod 21 and the locking threaded hole 23 are combined, and the locking cap 22 is rotated to lock the operating handle 122 to the central rod 121. A reference frame setting rod 62 extends from the operating handle 122 and is used to set a patient reference frame 3. The patient reference frame 3 is provided with at least three NDI spheres, each of which is not aligned in a straight line. The patient reference frame 3 is configured to have an adjustable angle, and the patient reference frame 3 can be adjusted as needed during surgery toward the imaging structure of the navigation system.

[0038] In use, first, the operating handle 122 is sleeved on the center rod 121, the rotating locking cap 22 is used to lock the operating handle 122 on the center rod 121, then the patient reference frame 3 is arranged on the reference frame arrangement rod 62, and then the insertion part 11 is inserted into the fractured bone of the long bone, the reduction operation is completed by holding the operating handle 122, and the position change of the fractured bone is understood under the tracking action of the navigation system.

[0039] In a more preferred embodiment, the reference frame arrangement rod 62 is arranged perpendicular to the central axis of the operating handle 122, which facilitates the extension of the reference frame arrangement rod 62 through the finger gap of the holding hand, and avoids the influence of the inclined arrangement on the hand holding operation.

[0040] In a more preferred embodiment, the reference Figure 5-7 In a more preferred embodiment, the operating handle 122 is centrally provided with a hard tube 1211, the hard tube 1211 is externally provided with a hand holding sleeve 1213 with good friction, and the hard tube 1211 is provided with a blocking disc 1212 at both ends to prevent the rubber sleeve from sliding; and one of the blocking discs 1212 is a detachable blocking disc 1212, which facilitates the arrangement of the hand holding sleeve 1213 and effectively reduces the overall size of the device; in addition, the detachable blocking disc 1212 facilitates the removal of the blocking disc 1212 for the arrangement of the hand holding sleeve 1213; or the hand holding sleeve 1213 is a structure with a longitudinal through slit, which is sleeved on the hard tube 1211 by elastic expansion. The hand holding sleeve 1213 is made of rubber or soft silicone. In the above arrangement, it is still necessary to consider the non-3D printing method,

[0041] In a more preferred embodiment, the operating reference frame is arranged on the operating handle 122; the specific arrangement is that Figure 5-6 In a more preferred embodiment, the operating reference frame is arranged on the operating handle 122; the specific arrangement is that In a more preferred embodiment, the operating reference frame is arranged on the operating handle 122; the specific arrangement is that

[0042] In a more preferred embodiment, the operating reference frame is arranged on the operating handle 122; the specific arrangement is that Figure 5-6 The bottom surface of the combination block 1215 is a rectangular surface 1216, and the hole 1214 is also arranged on a rectangular surface 1216. The combination of the two rectangular surfaces 1216 can prevent the combination block 1215 from shaking after the combination, thereby ensuring the stability of the position of the patient reference frame 3.

[0043] In a more preferred embodiment, the non-circular shape is a quadrilateral, further a square, and each corner of the square is rounded.

[0044] A more preferred embodiment is to refer to Figure 8-9 A limiting structure 123 is provided between the center rod 121 and the insertion portion. A limiting ring extends outward from the center rod 121 or the insertion portion. The limiting structure 123 includes a limiting plane 1231. The operating handle 122 is limited above the limiting plane 1231. This arrangement can effectively fix the operating handle 122 in an accurate position.

[0045] In a more preferred embodiment, in order to meet the hand gripping length requirement, the length of the center rod 121 is 10-15 cm. This distance setting can facilitate the hand gripping operation.

[0046] In a more preferred embodiment, to avoid interference with the operating area during operation, the operating grip portion is guided into an area away from the skin by the insertion portion. The length of the insertion portion is set to 10-15 cm, which ensures that it can be inserted through the body surface. At the same time, it can be kept away from the skin to ensure that the anti-rotation nail 41 is easily inserted.

[0047] A more preferred embodiment is to have the center rod 121 be 10-15 cm long to meet the required hand-gripping distance. This distance facilitates easy hand-gripping. To prevent interference with the operating area during operation, the insertion portion is guided to a position away from the skin. The insertion portion is 10-15 cm long, ensuring insertion through the body surface while maintaining a certain distance from the skin, ensuring easy insertion of the anti-rotation pin 41.

[0048] A more preferred embodiment is: Figure 8 and Figure 10The insertion portion 11 includes a thread tip portion and an insertion rod portion; a self-tapping groove is provided on the thread tip, and this arrangement facilitates the insertion of the thread tip portion of the insertion portion 11. In a more preferred embodiment, the first end of the thread tip portion is a tip, the opposite end is a second end, and a depth-limiting structure is provided at the second end of the thread tip portion; the depth-limiting structure includes a depth-limiting plane 113 having a diameter greater than the maximum diameter of the thread tip portion, or the depth-limiting plane 113 is formed by an insertion rod portion having a larger diameter than the thread tip portion; a depth-limiting plane 113 is formed because of the size difference between the insertion rod portion and the thread tip portion. The arrangement of the depth-limiting plane 113 ensures that only the thread tip portion of the insertion rod enters the bone, and the rear end of the insertion rod portion does not enter, thereby effectively preventing the thread tip portion from extending too far into the bone cavity and affecting the placement of the intramedullary nail.

[0049] In a more specific embodiment, the length of the thread tip portion ranges from 0.8 to 1.2 cm. This length setting can not only meet the need to avoid entering the bone cavity, but also ensure that the entry is deep enough, providing effective anchoring force for completing the reduction of long bone fractures through the operating part 12 connected to the insertion part 11.

[0050] Example 2: An anti-rotation reduction nail

[0051] It includes the above-mentioned reset pin with the insertion part 11 and the central rod 121, and the above-mentioned navigation handle. In addition, in the future, the following structure is provided to ensure that the reset pin does not rotate during the reset operation:

[0052] Reference Image Figure 2 、 Figure 11 、 Figure 12The operating structure also includes an anti-rotation structure 4, which is disposed between the operating portion 12 and the insertion portion 11. The anti-rotation structure 4 includes at least one plate-shaped structure 42 extending outward from the center axis of the reset pin, and the plate-shaped structure 42 is provided with a pin hole 421 for the anti-rotation pin 41. This method further ensures that the angle and position of the entire structure are not changed during operation through the operating structure, thereby ensuring the accuracy of the tracking position. Multiple pin holes 421 are provided on the plate-shaped structure, and multiple pin holes 421 are arranged in a single row along the edge or in multiple rows and columns on the plate-shaped structure 42. This arrangement ensures that the most suitable position is selected. A more preferred embodiment is that the plate-shaped structure 42 on one side has a fan-shaped cross-section, and multiple pin holes 421 are provided along the edge area of ​​the fan-shaped structure. This arrangement can increase the coverage of the pin holes 421, ensuring that the holes are facing the broken bone surface. The anti-rotation structure 4 also includes an anti-rotation pin 41, which is provided with a depth-limiting cap 411 to prevent the anti-rotation pin 41 from extending into the bone cavity and interfering with the placement of the intramedullary nail. A more preferred embodiment is that after the anti-rotation pin 41 enters through the pin insertion hole 421, its tip is flush with the tip of the insertion portion. Because the insertion portion is inserted first, this flush arrangement effectively prevents the anti-rotation pin 41 from being inserted deeper than the insertion portion. During installation, only ensuring the secure insertion of the insertion portion reduces the difficulty of installing the anti-rotation pin 41.

[0053] In a more preferred embodiment, the plate-shaped structure 42 includes 1-2 pairs of symmetrically arranged fan-shaped structures, wherein one pair of fan-shaped structures is preferably arranged.

[0054] A more preferred implementation is: in order to better improve the tracking accuracy and reduce the shaking error caused by the combination of the center rod 121 and the channel 124 with a non-circular cross-section, an arc-shaped protrusion 51 with a semicircular cross-section is provided on the anti-rotation structure 4, and the arc-shaped protrusion 51 is symmetrically arranged on the anti-rotation structure 4, and an arc-shaped recess 52 adapted to the arc-shaped protrusion 51 is provided on the blocking disk 1212 at the bottom of the operating handle 122, and the arc-shaped recess 52 is arranged in pairs along the outer periphery of the blocking disk 1212, and the central axis of each pair of arc-shaped recesses 52 is arranged on the same diameter; this setting can further lock the position, and the setting of multiple recesses can increase the options for angle settings and reduce the difficulty of selection. The symmetrical position limit can make the limit more secure.

[0055] A more preferred embodiment is as follows: a non-circular hole is provided on the anti-rotation structure 4 , and the hole 124 with a non-circular cross section is adapted to the shape of the center rod 121 , so as to facilitate the assembly and arrangement of the anti-rotation structure 4 .

[0056] A more preferred embodiment is to provide a limiting structure 123 between the center rod 121 and the insertion portion. The limiting ring extends outward from the center rod 121 or the insertion portion. The limiting structure 123 includes a limiting plane 1231, and the anti-rotation structure 4 is limited on the limiting plane 1231. The operating handle 122 is disposed above the anti-rotation structure 4. This arrangement effectively secures the operating handle 122 in a precise position.

[0057] The above is a clear and complete description of the technical solutions in the embodiments of the present invention through specific specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Those skilled in the art can easily understand the other advantages and functions of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation methods. In the absence of conflict, the above embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

Claims

1. A navigation handle for convenient operation of a reduction pin, the reduction pin comprising an insert portion and a central rod connected, characterized in that: The navigation handle includes An operating handle is provided inside the operating handle, and a non-circular hole with the same cross section as the center rod is provided. The operating handle is sleeved on the outside of the center rod. The locking structure includes a locking threaded rod and a locking cap. A locking threaded hole corresponding to the locking rod is provided on the center rod. The locking threaded rod and the locking threaded hole are combined. The locking cap is rotated to lock the operating handle on the center rod. The reference frame setting rod extends from the operating handle and is used to set the patient reference frame.

2. The navigation handle according to claim 1, wherein: The reference frame setting rod is set perpendicular to the central axis of the operating handle.

3. The navigation handle according to claim 1, wherein: A hard tube is set in the center of the operating handle, and a hand-held sleeve with good friction is set outside the hard tube. Blocking plates are set at both ends of the hard tube to prevent the rubber sleeve from sliding; and one of the blocking plates is detachable; or the hand-held sleeve is a structure with a longitudinal through seam.

4. The navigation handle according to claim 3, characterized in that: The hand-held cover is made of rubber or soft silicone material.

5. The navigation handle according to claim 3, characterized in that: A setting hole is provided on the hand-held sleeve and extends through a non-circular hole in cross section to the edge of the handle, and a combination block is provided correspondingly to the setting hole; a channel for the hard tube to pass through is provided on the combination block, and the combination block and the setting hole are combined to form a smooth hand-held sleeve; a reference frame setting rod extends from the combination block, and the setting hole is provided in the middle of the hand-held sleeve.

6. The navigation handle according to claim 5, characterized in that: The bottom surface of the combination block is a rectangular surface, and the corresponding setting hole is also a rectangular surface.

7. The navigation handle according to claim 1, wherein: The cross section of the center rod is set to be a quadrilateral, and each corner is set to be rounded. The hole with a non-circular cross section in the operating handle is adapted to the shape and size of the center rod.

8. The navigation handle according to claim 1, wherein: A limiting structure is provided between the center rod and the insertion portion. The limiting ring is formed by extending outward from the center rod or the insertion portion. The limiting structure includes a limiting plane. The operating handle is limited above the limiting plane.

9. The navigation handle according to any one of claims 1 to 8, characterized in that: The length of the central rod portion is 10-15 cm.

10. The navigation handle according to any one of claims 1 to 8, characterized in that: The length of the insertion portion is set to 10-15 cm.

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