A navigation reduction and reduction maintenance device for long bone fractures

Abstract

The invention discloses a navigation reduction and reduction maintenance device for long bone fractures, which comprises two reference frames, and the position changes of two broken bones are tracked by a navigation system; two operating structures of the reference frames are provided, and the operating reference frames and the operating structures do not undergo relative position changes, and the reference frames are provided with insertion parts, and the two insertion parts are respectively inserted into the two broken bones; a reduction and maintenance structure is also provided, which comprises a connecting rod, an adjustment locking ring and an adjustment locking structure respectively provided on the two operating structures, the connecting rod extends into the two adjustment locking rings, and the adjustment locking rings and the connecting rod are respectively controlled to switch between a non-locked state and a locked state through the two adjustment locking structures; the operating part is controlled to drive the broken bone to undergo reduction movement, and the navigation system tracks the reference frame to observe whether the broken bone is reduced on a display structure; after reduction, the adjustment locking structure locks the position relationship between the adjustment locking ring and the connecting rod, and after the positions of the two ends of the connecting rod are locked, the positions of the connecting rod and the operating part are locked.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a long bone fracture reduction and fixation surgery after a navigation system is connected, and specifically relates to a long bone fracture navigation reduction and reduction maintenance device. Background Art

[0002] Currently, many surgeries are performed using navigation systems to ensure the accuracy of the surgical process. This includes fracture surgeries for 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 recovery for the patient.

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

[0004] In view of the above technical problems, the present invention provides a navigation reduction and reduction maintenance device for long bone fractures. Summary of the invention

[0005] The reference frame that only plays a tracking role affects the operator's operating space for the reduction operation. In addition, long bone fracture reduction is only one of the steps. After this step, the intramedullary nail needs to be placed and fixed. In order to ensure the smooth placement of the intramedullary nail, an operator is required to maintain the reduction state or maintain the fracture reduction state through a special fixation device, so as to finally achieve the purpose of smooth placement of the intramedullary nail. However, it is difficult for one person to complete the reduction, reduction maintenance and smooth placement of the intramedullary nail with the existing technology; even under the navigation system, one person cannot complete the relevant operations. So how to effectively combine the operation reference frame with the reduction operation and the reduction maintenance action to ensure that one person or fewer people can complete the relevant fracture reduction, reduction maintenance and smooth placement of the intramedullary nail.

[0006] The present invention combines the reduction instrument with the reference frame, and connects the reduction instrument and the reference frame on the two broken bones through a connecting rod. After the reduction is completed, the positional relationship between the connecting rod, the reduction instrument and the reference frame is locked to achieve the effect of reduction maintenance. The specific technical solution is:

[0007] Long bone fracture navigation reduction and reduction maintenance device, including:

[0008] An operating structure having an insertion portion and an operating portion; the insertion portions of at least two operating structures are respectively inserted into different broken bones of the fractured long bone;

[0009] A reference frame, fixedly connected to the operating part;

[0010] The reset maintaining structure includes a connecting rod and at least two adjusting locking rings with adjusting locking structures;

[0011] The adjusting locking ring is fixedly connected to the operating part, and the connecting rod is inserted into the adjusting locking ring, and the adjusting locking structure is adjusted so that the adjusting locking ring, the operating structure and the connecting rod have a locking state and an unlocking state;

[0012] In the locked state, the relative positions of the operating structure, the adjusting locking ring and the connecting rod are all locked; in the unlocked state, the adjusting locking ring and the connecting rod are rotationally connected, and the adjusting locking ring slides along the axis of the connecting rod.

[0013] Control one of the operating parts and the other operating part to drive the first broken bone and the second broken bone to perform resetting movement, and observe whether the first broken bone and the second broken bone are relocated on the display structure by tracking the corresponding two reference frames through the navigation system; after resetting, adjust the corresponding locking structure to lock the position relationship between the locking ring and the connecting rod; after the positions of both ends of the connecting rod are locked, the connecting rod is locked with the two operating parts respectively.

[0014] When in use, the two broken bones are driven to undergo resetting movement by controlling the two operating parts. When the resetting movement occurs, the connecting rod and the two adjusting locking rings change their relative positions to satisfy the position change between the two operating parts. After the two broken bones are reset, the two adjusting locking structures are controlled to lock the position relationship between the connecting rod and the operating part, thereby achieving the purpose of maintaining the resetting state.

[0015] Through the above-mentioned settings, the reference frame and the reduction instrument can be effectively combined, and the reduction and maintenance results after the broken bone reduction are achieved through the settings of the connecting rod, the adjustment locking ring and the adjustment locking structure of the reduction and maintenance structure. Ultimately, one person or fewer people can complete the reduction and reduction maintenance operations of the broken bone fracture navigation surgery.

[0016] Furthermore, the first end of the operating part is the end away from the insertion part, and the second end of the operating part is the end close to the insertion part; an adjustment locking ring and an adjustment locking structure are provided at the first end of the operating part; when the adjustment locking ring is in an unlocked state, the adjustment locking ring can rotate relative to the first end of the operating part, and the connecting rod moves axially in the adjustment locking ring.

[0017] Furthermore, two elastic adjusting locking pieces extend from the adjusting locking ring, and the adjusting locking ring gradually locks the position of the connecting rod by adjusting so that the distance between the two adjusting locking pieces becomes smaller; the adjusting locking piece gradually loosens the adjusting locking when the distance between the two adjusting locking pieces becomes larger; through holes are provided on the two adjusting locking pieces;

[0018] The adjustment locking structure includes a locking cap and a locking rod. The first end of the operating part is provided with a locking hole for the locking rod to extend into and lock the position of the locking rod in the locking hole. The adjustment locking sheet is provided between the locking cap and the first end of the operating part, and the locking rod enters the locking hole after passing through the two insertion holes.

[0019] When the locking rod is extended into the locking position of the locking hole, the locking cap moves with the locking rod and drives the two adjusting locking plates to approach each other, thereby reducing the diameter of the adjusting locking ring and gradually locking the connecting rod; when the locking position is reached, the diameter of the adjusting locking ring is the smallest and the connecting rod is locked.

[0020] Furthermore, the locking rod is a threaded rod, the locking hole is a threaded hole, and the position of the threaded rod in the threaded hole is adjusted by rotating the locking cap. Alternatively, an elastic locking protrusion is provided on the locking rod; a locking groove is correspondingly provided in the locking hole; when the locking protrusion enters the locking groove, the locking ring is adjusted to lock the connecting rod position.

[0021] Furthermore, anti-drop caps are provided at both ends of the connecting rod, and at least one of the anti-drop caps is detachable; in this way, the anti-dropping of both ends is achieved, and it is ensured that the connecting rod is removed after the reset action is completed.

[0022] Furthermore, a circle of anti-rotation teeth is arranged at the first end portion of the operating part, and matching anti-rotation teeth are correspondingly arranged on an adjusting locking piece; the height of the anti-rotation teeth is less than the distance between the two adjusting locking pieces in the unlocked state. This arrangement can ensure that the anti-rotation teeth will not hinder the rotation of the two adjusting locking pieces in the unlocked state; but in the locked state, the anti-rotation teeth at the first end portion of the operating part are in close contact with the anti-rotation teeth on the adjusting locking piece, which can further achieve the stability of the position of the adjusting locking piece in the locked state.

[0023] Furthermore, the operating structure also includes an anti-rotation structure, which is arranged between the operating part and the insertion part. The anti-rotation structure includes at least one plate-shaped structure extending outward on one side, and a nail hole for the anti-rotation nail is arranged on the plate-shaped structure; the anti-rotation nail enters the broken bone through the nail hole and combines with the insertion part in the broken bone to play an anti-rotation function. In this way, it is further ensured that the angle and position of the whole structure are avoided when operating through the operating structure, thereby ensuring the accuracy of tracking position.

[0024] Furthermore, the present invention also discloses a navigation reduction and reduction maintenance kit for long bone fractures, which includes the above-mentioned reduction and reduction maintenance instrument, a navigation tracking structure for tracking the real-time position of a reference frame, and a display device; a reference frame with an NDI ball is arranged on each operating structure; when the operating structure drives the broken bone to move, the reference frame is synchronously caused to generate a displacement path, the position signal of the reference frame is captured by the navigation tracking structure, and the position signal is input into the display device; the display device stores the broken bone image aligned with the reference frame, and displays the position change of the broken bone image in real time through the position signal of the reference frame.

[0025] The beneficial effects of the present invention are:

[0026] 1) By combining the reference frame, the operating structure and the reduction maintenance structure, it is ensured that during navigation surgery for long bone fractures, reduction tracking is completed by the reference frame, reduction operation is completed by the operating structure, and maintenance after reduction is completed by the reduction maintenance structure. Multiple steps and multiple functions are creatively integrated into one instrument structure, ultimately achieving the goal of one person or fewer medical staff participating in navigation surgery for long bone fractures.

[0027] 2) Through the effective combination of the reset and maintenance structure and the operating structure, through the coordination of the connecting rod, the adjusting locking ring and the adjusting locking structure, the changes in the unlocked state and the locked state of the adjusting locking ring and the connecting rod are adjusted by the adjusting locking structure, so that during the reset operation, the reset and maintenance structure in the unlocked state can follow the movement without affecting the reset action. After the reset is completed, the positions of the reset and maintenance structure in the locked state and the operating structure are stable, and finally a stable reset and maintenance device is formed to ensure the subsequent operation and the reset state can be maintained without the need for additional medical personnel.

[0028] 3) By adjusting the locking piece, the locking cap, the locking rod, the locking hole and the adjusting locking piece arranged at the locking cap and the first end of the operating part, this arrangement can achieve the locking operation of the reset maintaining structure by moving the thumb and index finger upward after the reset is completed by holding the operating structure with both hands, making the entire reset and reset maintenance process very simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the navigation reduction and reduction maintenance device for long bone fractures of the present invention, which has a reference frame and the reference frame is arranged at the position of the operating handle;

[0030] Figure 2 It is a schematic structural diagram of a navigation reduction and reduction maintenance device for a long bone fracture in the present invention in which no reference frame is provided and the reference frame is provided at the position of an operating handle;

[0031] Figure 3 It is a schematic diagram of the structure of a single operating structure combined with an adjustment locking ring of the present invention;

[0032] Figure 4 It is a three-dimensional structural schematic diagram of the reset maintaining structure of the combination of the connecting rod, the adjusting locking ring and the adjusting locking piece of the present invention;

[0033] Figure 5 It is a partial enlarged structural schematic diagram of the first end of the operating handle of the present invention having anti-rotation teeth;

[0034] Figure 6 This is a schematic diagram of the structure of the combined part of the adjusting locking ring and the adjusting locking piece of the present invention;

[0035] Figure 7 It is a schematic diagram of a longitudinal cross-sectional structure of a single operating structure combined with an adjustment locking ring of the present invention;

[0036] Figure 8 It is a schematic diagram of the overall structure of the navigation reduction and reduction maintenance device for long bone fractures of the present invention, which has a reference frame and the reference frame is arranged at the anti-rotation structure position;

[0037] Fig. 9 It is a structural schematic diagram of the anti-rotation structure of the present invention;

[0038] Fig.10 It is a partial enlarged structural diagram of the combination of the operating handle and the anti-rotation structure of the present invention;

[0039] Fig.11 This is a schematic diagram of the anti-rotation nail structure of the present invention;

[0040] Fig.12 This is a schematic diagram of the structure of the operating handle of the present invention;

[0041] Fig.13 This is a schematic diagram of the structure of the hand-held sleeve of the present invention;

[0042] Fig.14 It is a schematic diagram of the structure of the present invention after the combination hole and the reference frame setting rod are combined;

[0043] Fig.15 It is a partial structural schematic diagram of the hard tube of the present invention;

[0044] Fig.16 It is a schematic diagram of the nail body structure in which the central rod and the inserting part are combined in the present invention;

[0045] Fig.17 It is a partial enlarged structural schematic diagram of the limiting structure between the central rod and the insertion part of the present invention;

[0046] Fig.18 It is a schematic diagram of the partially enlarged structure of the thread tip section of the present invention;

[0047] Fig.19This is a schematic diagram of the combination structure of the locking cap and the locking rod of the present invention. Since the thread structure is a prior art, the thread is not shown in the figure, but the fact that it is not shown does not affect the understanding of the solution;

[0048] Fig. 20 It is a schematic diagram of the longitudinal cross-sectional structure of the nail body after the locking rod of the present invention is arranged in the locking hole;

[0049] Description of main reference numerals

[0050] 1. Operation structure; 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 plate; 1213. Hand-held sleeve; 1214. Setting hole; 1215. Combination block; 1216. Rectangular surface; 123. Position limiting structure; 1231. Position limiting plane; 124. Channel with non-circular cross section; 2 1. Adjustment locking ring; 211. Adjustment locking plate; 212. Through hole; 221. Locking cap; 222. Locking rod; 223. Locking hole; 23. Connecting rod; 231. Anti-drop cap; 232. Anti-rotation teeth; 3. Reference frame; 4. Anti-rotation structure; 41. Anti-rotation pin; 411. Depth limiting 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

[0051] Example 1

[0052] refer to Figure 1 , Figure 2 and Figure 8 ; A navigation reduction and reduction maintenance device for long bone fractures, comprising:

[0053] The operating structure 1 has an insertion portion 11 and an operating portion 12; the insertion portions 11 of at least two operating structures 1 are respectively inserted into different fractured bones of the fractured long bone;

[0054] A reference frame 3, fixedly connected to the operating portion 12;

[0055] The reset maintaining structure includes a connecting rod 23 and at least two adjusting locking rings 21 with adjusting locking structures;

[0056] The adjusting locking ring 21 is fixedly connected to the operating part 12, and the connecting rod 23 is inserted into the adjusting locking ring 21, and the adjusting locking structure is adjusted so that the adjusting locking ring 21 and the operating structure 1 and the connecting rod 23 have a locking state and an unlocking state;

[0057] In the locked state, the relative positions of the operating structure 1, the adjusting locking ring 21 and the connecting rod 23 are all locked; in the unlocked state, the adjusting locking ring 21 and the connecting rod 23 are rotationally connected, and the adjusting locking ring 21 slides along the axis of the connecting rod 23;

[0058] When performing long bone fracture reduction, the reduction maintaining structure maintains the positional relationship of at least two operating structures 1 so that the operating structures 1 can move more stably along the reduction path, wherein the operating structures 1 are respectively inserted into the two broken bones of the fractured long bone, wherein one operating structure 1 serves as a fixed reference during the reduction process, i.e., the end point of the reduction path, and the other operating structure 1 pulls the other broken bone along the reduction path toward the above-mentioned end point, and the displacement range of the two operating structures 1 is limited by the reduction maintaining structure to ensure the stability and accuracy of the reduction path, wherein the reduction paths of the two are determined by the bone reduction simulation before reduction, specifically: when the three-dimensional bone at one end is stationary, the reduction path of the three-dimensional bone at the other end is reduced by adjusting the angle and distance, which is the reduction planning path; or when the three-dimensional bones at both ends are reduced by adjusting the angle and distance, respectively, the reduction path is the reduction planning path.

[0059] The two operating parts 12 are controlled to drive the first broken bone and the second broken bone to undergo resetting movement, and the navigation system tracks the two reference frames 3 to observe on the display structure whether the first broken bone and the second broken bone are relocated; after resetting, the two adjustment locking structures respectively lock the positional relationship between the adjustment locking ring 21 and the connecting rod 23; after locking, the positions of the connecting rod 23 and the two operating parts 12 are locked.

[0060] In the specific implementation, the activity requirements during resetting need to be met. How to adjust the relationship between the locking ring 21, the locking structure and the operating structure 1 is the key to ensure that the reset maintaining structure can follow the resetting. The specific implementation is as follows: the first end of the operating part 12 is the end away from the insertion part 11, and the second end of the operating part 12 is the end close to the insertion part 11; the first end of the operating part 12 is provided with the locking ring 21 and the locking structure; when the locking ring 21 is unlocked, the locking ring 21 can rotate relative to the first end of the operating part 12, and the connecting rod 23 moves axially in the locking ring 21. In this way, the follow-up of the reset maintaining structure during the resetting process can be perfectly achieved.

[0061] refer to Figure 3 , Figure 4 and Figure 5, more specifically, the setting method of the adjustment locking ring 21 and the adjustment locking structure is as follows: two elastic adjustment locking pieces 211 extend from the adjustment locking ring 21, and the adjustment locking structure is adjusted to reduce the distance between the two adjustment locking pieces 211 so that the diameter of the adjustment locking ring 21 gradually decreases to achieve the purpose of finally locking the position of the connecting rod; the distance between the two adjustment locking pieces 211 becomes larger so that the adjustment lock is gradually loosened; through holes 212 are set on the two adjustment locking pieces 211; the adjustment locking structure includes a locking cap 221 and a locking rod 222, and a locking hole 223 is set at the first end of the operating part 12, for the locking rod 222 to extend into and lock the position of the locking rod 222 in the locking hole 223; the adjustment locking piece 211 is set It is placed between the locking cap 221 and the first end portion of the operating part 12, and the locking rod 222 enters the locking hole 223 after passing through the two insertion holes; when the locking rod 222 extends into the locking position of the locking hole 223, the locking cap 221 moves with the locking rod 222 and drives the two adjusting locking pieces 211 to approach each other, thereby making the diameter of the adjusting locking ring 21 smaller and gradually locking the connecting rod 23; when reaching the locking position, the diameter of the adjusting locking ring 21 is the smallest, and the connecting rod 23 is locked; in the locked state, the bottom surface of the adjusting locking cap 221 is in close contact with the contact surface of the adjusting locking piece 211 and the first end surface of the operating part 12 is in close contact with the contact surface of the adjusting locking piece 211, providing greater pressure to prevent the adjusting locking piece 211 from rotating.

[0062] refer to Figure 7 , Fig.19 and Fig. 20 The specific locking method corresponds to the following structure: the locking rod 222 is a threaded rod, the locking hole 223 is a threaded hole, and the position of the threaded rod in the threaded hole is adjusted by rotating the locking cap 221. Alternatively, an elastic locking protrusion is provided on the locking rod 222; a locking groove is correspondingly provided in the locking hole 223; when the locking protrusion enters the locking groove, the locking ring 21 is adjusted to lock the position of the connecting rod 23.

[0063] More specifically, the adjusting locking piece 211 comprises a circular piece having a diameter greater than or equal to the diameter of the first end of the operating portion 12; a through hole 212 is centrally disposed on the circular piece. The adjusting locking piece 211 also comprises a connecting neck for connecting the circular piece with the adjusting locking ring 21.

[0064] refer to Figure 4 More specifically, anti-drop caps 231 are provided at both ends of the connecting rod 23, and at least one of the anti-drop caps 231 is detachable; in this way, the anti-dropping of both ends is achieved, and the connecting rod 23 is ensured to be removed after the reset action is completed. The detachable anti-drop cap 231 is combined with the connecting rod 23 by an adapted screw structure.

[0065] More specifically, the first end of the locking cap 221 is the end away from the insertion part 11, the second end of the locking cap 221 is the end close to the insertion part 11, and the diameter of the first end of the locking cap 221 is not less than the diameter of the circular piece. The locking cap 221 includes a middle cylindrical part and a rotating operating part 12 symmetrically arranged on both sides of the cylindrical part; the setting of the rotating operating part 12 can effectively realize the adjustment of the rotating locking piece distance.

[0066] refer to Figure 4 , Figure 5 and Figure 6 ; More specifically, if the contact surfaces of the adjusting locking piece 211 and the first end of the operating part 12 are both planes, then the force to prevent rotation through close contact is mainly the friction of the contact surface, but the friction of a relatively smooth plane is easily overcome, and ultimately when the reset is maintained, the connecting rod 23 is easily caused to rotate because of the large separation force; Therefore, in order to avoid the problem of rotation after locking, the following structure is set, specifically, a circle of anti-rotation teeth 232 is set at the first end of the operating part 12, and a matching anti-rotation tooth 232 is correspondingly set on an adjusting locking piece 211; the height of the anti-rotation tooth 232 is less than the distance between the two adjusting locking pieces 211 in the unlocked state, and this arrangement can ensure that the anti-rotation tooth 232 will not hinder the rotation of the two adjusting locking pieces 211 in the unlocked state; but in the locked state, the anti-rotation tooth 232 at the first end of the operating part 12 is in close contact with the anti-rotation tooth 232 on the adjusting locking piece 211, which can further achieve the stability of the position of the adjusting locking piece 211 in the locked state.

[0067] In a more preferred embodiment, the operating portion 12 includes a central rod 121 connected to the insertion portion 11; an operating handle 122 is provided on the outer side of the central rod 121 for convenient hand gripping. The central rod 121 is integrally connected to the insertion portion 11, and a hole 124 with a non-circular cross section is provided on the operating handle 122. The central rod 121 is configured as a rod with a non-circular cross section, and the hole 124 with a non-circular cross section is adapted to the rod with a non-circular cross section, and will not rotate after being combined. The preferred shape of the non-circular cross section is a quadrilateral, and further a square, and each corner of the square is rounded.

[0068] refer to Figure 7 , Fig.19 and Fig. 20A more preferred embodiment is that a reference frame 3 is provided on the operating handle 122, the first end of the center rod 121 is away from the insertion part 11, and the second end of the center rod 121 is close to the insertion part 11; a locking cap 221 is provided at the first end of the center rod 121, a locking rod 222 is provided at the front end of the rotating cap, and a locking hole 223 is provided in the center rod 121; note that the locking rod 222, the locking hole 223 and the locking cap 221 here are the same structure as the corresponding structures on the adjustment locking structure; when the adjustment locking ring is in the unlocked state, the locking rod 222 penetrates into the locking hole 223; and the plane of the second end of the locking cap 221 contacts the upper adjustment locking piece 211, and there is elastic force between the upper adjustment locking piece 211 and the lower adjustment locking piece 211, but the distance between the upper adjustment locking piece 211 and the lower adjustment locking piece 211 is greater than the height of the anti-rotation tooth 232.

[0069] refer to Fig.12 , Fig.13 , Fig.14 and Fig.15In a more preferred embodiment, the instrument needs to play the role of the reference frame 3 after the reset operation is completed. Therefore, it is necessary to solve how to reduce the weight of the entire operating instrument while ensuring the convenience of the reset operation. The specific solution to the above problem is that a thin hard tube 1211 is set at the center of the operating handle 122, a hand-held cover 1213 with good friction is set outside the hard tube 1211, and blocking plates 1212 are set at both ends of the hard tube 1211 to prevent the rubber cover from sliding; and one of the blocking plates 1212 is a detachable blocking plate 1212, which is convenient for the setting of the hand-held cover 1213 and can effectively reduce the overall size of the device; in addition, the detachable blocking plate 1212 is set to facilitate the removal of the blocking plate 1212 to set the hand-held cover 1213; or the hand-held cover 1213 is a structure with a longitudinal through seam, and the hand-held cover 1213 is pulled open and connected to the hard tube 1211 by elasticity. The hand-held cover 1213 is made of rubber or soft silicone material. Under the above settings, it is still necessary to consider how to set the operating reference frame on the operating handle 122 in a non-3D printing manner; the specific setting method is to set a setting hole 1214 that exceeds the non-circular cross-section channel 124 and penetrates to the edge of the handle on the hand-held sleeve 1213, and correspondingly set a combination block 1215 that is combined with the setting hole 1214; a channel for the hard tube 1211 to pass through is set on the combination block 1215, and the combination block 1215 is made of high-strength material. The holes 1214 are combined to form a smooth hand-held sleeve 1213; a reference frame setting rod 62 extends from the combination block 1215, the reference frame 3 is set on the reference frame setting rod 62, and the setting hole 1214 is set in the middle of the hand-held sleeve 1213; in addition, the bottom surface of the combination block 1215 is a rectangular surface 1216, and the corresponding setting hole 1214 is also a rectangular surface 1216. The combination of the two rectangular surfaces 1216 can prevent the combination block 1215 from shaking after assembly, thereby ensuring the stability of the position of the reference frame 3. The assembly method of the operating handle 122 is as follows: first, the assembly block 1215 is set into the assembly hole, the blocking disk 1212 at one end of the hard tube 1211 is removed, the hard tube 1211 is inserted into the assembled hand-held sleeve 1213, and then the removed blocking disk 1212 is installed, thus completing the assembly of the operating handle 122; after the assembly of the operating handle 122 is completed, it is sleeved on the center rod 121, and then the operating handle 122 is locked in a suitable position by rotating the locking cap 221.

[0070] refer to Fig. 9 , Fig.10 and Fig.11In a more specific embodiment, the operating structure 1 further 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 central axis of the operating structure, and a pin hole 421 for the anti-rotation pin 41 is disposed on the plate-shaped structure 42. The anti-rotation pin enters the broken bone through the pin hole 421 and combines with the insertion portion 11 in the broken bone to perform an anti-rotation function. In this way, it is further ensured that the angle and position of the overall structure are avoided when operating the operating structure 1, thereby ensuring the accuracy of the tracking position. A plurality of pin holes 421 are disposed on the plate-shaped structure 42, and a plurality of pin holes 421 are disposed, and the plurality of pin holes 421 are disposed in a single row edge arrangement manner or the pin holes 421 are arranged in multiple rows and columns on the plate-shaped structure 42. This arrangement can ensure that a most suitable position is selected. A more preferred embodiment is that the plate-shaped structure 42 on one side is a fan-shaped structure with a fan-shaped cross section, and a plurality of nail holes 421 are arranged along the edge area of ​​the fan-shaped structure. This arrangement can increase the coverage of the nail holes 421 and ensure that the holes can face the bone surface of the broken bone. The anti-rotation structure 4 also includes an anti-rotation nail 41, and a depth limiting cap 411 is arranged on the anti-rotation nail 41 to prevent the anti-rotation nail 41 from extending into the bone cavity and affecting the insertion of the intramedullary nail. A more preferred embodiment is that after the anti-rotation nail 41 enters through the nail hole 421, the position of its tip is flush with the tip of the insertion part 11. Because the insertion part 11 is inserted first, the flush arrangement can effectively prevent the anti-rotation nail 41 from being inserted into a deeper position than the insertion part 11. When setting, it is only necessary to ensure that the insertion part 11 is inserted safely to reduce the difficulty of setting the anti-rotation nail 41.

[0071] 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.

[0072] refer to Fig.10 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 circumference of the blocking disk 1212, and the central axis of each pair of arc-shaped recesses 52 is arranged on the same diameter; this arrangement can further lock the position, and the arrangement 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.

[0073] A more preferred embodiment is as follows: a hole with a non-circular cross section 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 .

[0074] refer to Fig.16 and Fig.17 A more preferred embodiment is: a limiting structure 123 is provided between the central rod 121 and the inserting portion 11, a limiting ring is formed by extending outward from the central rod 121 or the inserting portion 11, the limiting structure 123 includes a limiting plane 1231, and the anti-rotation structure 4 is limited on the limiting plane 1231. This arrangement can effectively fix the anti-rotation structure 4 to an accurate position.

[0075] In one embodiment, in addition to setting the reference frame 3 at the position of the operating handle 122, it can also be set on the anti-rotation structure 4, specifically, a reference frame setting plate 61 is extended from the edge of a fan-shaped structure; the reference frame setting plate 61 can be set as a straight plate or a right-angle plate; a reference frame setting rod 62 is set on the reference frame setting plate 61; and the reference frame 3 is set on the reference frame setting rod 62. The reference frame 3 is combined with the operating instrument and the reset maintenance structure by setting the reference frame 3 to the fan-shaped structure. Alternatively, the reference frame 3 is set on the operating part 12.

[0076] A more preferred embodiment is: in order to meet the hand holding length requirement, the length of the center rod 121 is 10-15 cm, and this distance setting can meet the convenience of hand holding operation. In order to avoid the operator's interference with the operating part during operation, the operating holding part is introduced into the area away from the skin by the insertion part 11; the length of the insertion part 11 is set to 10-15 cm, which can meet the need of insertion through the body surface. In addition, it can be away from the skin for a certain distance to ensure the convenience of inserting the anti-rotation nail 41.

[0077] refer to Fig.16 and Fig.18 A more preferred embodiment is as follows: the insertion portion 11 includes a thread tip section 111 and an insertion rod section 112; a self-tapping groove is provided on the thread tip, and this arrangement facilitates the insertion of the thread tip section 111 of the insertion portion 11. Further, the first end of the thread tip section 111 is a tip, and the opposite end is a second end, and a depth limiting structure is provided at the second end of the thread tip section 111; the depth limiting structure includes a depth limiting plane 113 whose diameter is greater than the maximum diameter of the thread tip section 111, or the depth limiting plane 113 is formed by the insertion rod section 112 whose diameter is greater than that of the thread tip section 111; because the size difference between the insertion rod section 112 and the thread tip section 111 forms a depth limiting plane 113, the arrangement of the depth limiting plane 113 can ensure that only the thread tip section 111 of the insertion rod enters the bone, and the rear end insertion rod section 112 will not enter, which can effectively prevent the thread tip section 111 from extending too far into the bone cavity and affecting the placement of the intramedullary nail.

[0078] In a more specific embodiment, the length of the thread tip section 111 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 to provide effective anchoring force for completing the reduction of long bone fractures through the operating part 12 connected to the insertion part 11.

[0079] Example 2

[0080] A combined method of navigation reduction and reduction maintenance apparatus for long bone fractures in embodiment 1,

[0081] 1) Select the insertion position of the insertion part 11, mark the surface position of the insertion parts 11 of the two operating structures 1 and the insertion angle of the insertion parts 11 under the guidance of the X-ray developing machine, and ensure that the two insertion parts 11 are respectively set at the middle position of the first broken bone and the middle position of the second broken bone, or ensure that the two insertion parts 11 are respectively set at a position more than 8 cm away from the fracture surface of the first broken bone and the fracture surface of the second broken bone;

[0082] 2) Inserting the insertion part 11, placing the threaded tip sections 111 of the two operation structure 1 insertion parts 11 into the broken bones; inserting into the first and second broken bones of the patient through the skin on the body surface under the action of the X-ray developing machine;

[0083] 3) The anti-rotation structure 4 is provided, and the anti-rotation structure 4 is sleeved and provided on the central rod 121 of the operating part 12, and the limiting structure 123 between the central rod 121 and the insertion part 11 completes the purpose of limiting the anti-rotation structure 4 between the central rod 121 and the insertion part 11;

[0084] 4) Setting of the operating handles 122: Setting the non-circular cross-section holes 124 of the two operating handles 122 on the center rod 121; combining the arc-shaped protrusion 51 with the arc-shaped recess 52 during the process, so that the position stability of the operating handles 122 during the operation can be well achieved through the dual effects of the non-circular cross-section holes 124 and the protrusions and recesses.

[0085] 5) Setting the adjustment locking ring 21, setting the adjustment locking ring 21 on the locking rod 222 of the adjustment locking structure, and combining the locking rod 222 with the locking hole 223 in the center rod 121, and rotating the locking cap 221 so that the adjustment locking pieces 211 on the same adjustment locking ring 21 are close to each other, but the rotation of the rotation locking ring is not locked;

[0086] 6) To set the connecting rod 23, remove an anti-drop cap 231, insert the connecting rod 23 into the two adjustment locking rings 21 in sequence, and then combine the anti-drop cap 231 with the connecting rod 23 to complete the setting of the connecting rod 23.

[0087] 7) Setting of the reference frame 3 : The reference frame 3 is assembled and fixedly set on the operating handle 122 or the reference frame setting rod 62 on the anti-rotation structure 4 .

[0088] Example 3

[0089] A method for using the navigation reduction and reduction maintenance device for long bone fractures in embodiment 1,

[0090] 1) The reference frame 3 is recognized by the navigation system, and the broken bones moving with the reference frame 3 are displayed on the display structure of the navigation system;

[0091] 2) Holding the operating handle 122, the two broken bones are driven to undergo reduction activities, and the reduction conditions are understood by observing the reduction activities of the broken bones on the display structure;

[0092] 3) Observe from various angles whether the broken bone is effectively reduced. When it is observed that the reduction is complete, rotate the locking cap 221 so that the two adjustment locking plates 211 on the same adjustment locking ring 21 are in close contact, and at the same time, the anti-rotation teeth 232 on the operating handle 122 are engaged with the anti-rotation teeth 232 on the adjustment locking plate 211, thereby locking the positional relationship between the connecting rod 23 and the operating handle 122.

[0093] The technical solutions in the embodiments of the present invention are clearly and completely described above through specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents 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 reduction and reduction maintenance device for long bone fractures, It is characterized in that It includes: An operating structure (1) having an insertion portion (11) and an operating portion (12); The insertion parts (11) of at least two operating structures (1) are respectively inserted into different broken bones of the fractured long bone; The operating portion (12) comprises a central rod (121) connected to the insertion portion (11); an operating handle (122) is arranged outside the central rod (121) for convenient hand gripping; a hole (124) with a non-circular cross section is arranged on the operating handle (122); the central rod (121) is arranged as a rod with a non-circular cross section; The operating structure (1) comprises an anti-rotation structure (4), the anti-rotation structure (4) being arranged between the operating part (12) and the insertion part (11), the anti-rotation structure (4) comprising at least one plate-shaped structure (42) extending outward on one side, a nail insertion hole (421) for the anti-rotation nail (41) being arranged on the plate-shaped structure (42), the anti-rotation nail passing through the nail insertion hole (421) entering the broken bone and combining with the insertion part (11) in the broken bone to perform an anti-rotation function; a plurality of nail insertion holes (421) are arranged on the plate-shaped structure (42), the nail insertion holes (421) A plurality of such pin holes (421) are provided, and the plurality of such pin holes (421) are arranged in a single row or in a plurality of rows and columns on the plate-shaped structure (42); the anti-rotation structure (4) also comprises an anti-rotation pin (41), and a depth limiting cap (411) is provided on the anti-rotation pin (41); after the anti-rotation pin (41) enters through the pin hole (421), the position of the tip of the anti-rotation pin (41) is flush with the tip of the insertion portion (11); a hole with a non-circular cross section is provided on the anti-rotation structure (4), and the non-circular cross section of the hole (124) is adapted to the shape of the center rod (121); A limiting structure (123) is provided between the central rod (121) and the insertion portion (11), the limiting structure (123) is formed by extending outward from the central rod (121) or the insertion portion (11), the limiting structure (123) comprises a limiting plane (1231), and the anti-rotation structure (4) is limited on the limiting plane (1231); The insertion portion (11) comprises a thread tip section (111) and an insertion rod section (112); the thread tip section (111) has a first end as a tip and an opposite end as a second end; the second end of the thread tip section (111) is provided with a depth limiting structure; the depth limiting structure comprises a depth limiting plane (113) having a diameter greater than the maximum diameter of the thread tip section (111); or the depth limiting plane (113) is formed by the insertion rod section (112) having a larger diameter than the thread tip section (111); A reference frame (3) fixedly connected to the operating portion (12); The reset maintaining structure comprises a connecting rod (23) and at least two adjusting locking rings (21) having an adjusting locking structure; The adjusting locking ring (21) is fixedly connected to the operating part (12), and the connecting rod (23) is inserted into the adjusting locking ring (21), and the adjusting locking structure is adjusted so that the adjusting locking ring (21) and the operating structure (1) and the connecting rod (23) have a locked state and an unlocked state; In the locked state, the relative positions of the operating structure (1), the adjusting locking ring (21) and the connecting rod (23) are all locked; in the unlocked state, the adjusting locking ring (21) and the connecting rod (23) are rotationally connected, and the adjusting locking ring (21) slides along the axis of the connecting rod (23).

2. The navigation reduction and reduction maintenance device for long bone fractures according to claim 1, It is characterized in that The first end of the operating portion (12) is an end away from the insertion portion (11), and the second end of the operating portion (12) is an end close to the insertion portion (11); an adjustment locking ring (21) and an adjustment locking structure are provided at the first end of the operating portion (12); when the adjustment locking ring (21) is in an unlocked state, the adjustment locking ring (21) can rotate relative to the first end of the operating portion (12).

3. The navigation reduction and reduction maintenance device for long bone fractures according to claim 2, It is characterized in that Two elastic adjusting locking pieces (211) extend from the adjusting locking ring (21); the adjusting locking pieces (211) are adjusted so that the distance between the two adjusting locking pieces (211) decreases, so that the adjusting locking ring (21) gradually locks the position of the connecting rod; the distance between the two adjusting locking pieces (211) increases, so that the adjusting locking is gradually released; through holes (212) are provided on the two adjusting locking pieces (211); The adjustment locking structure comprises a locking cap (221) and a locking rod (222); a locking hole (223) is provided at the first end of the operating portion (12) for the locking rod (222) to extend into and lock the position of the locking rod (222) in the locking hole (223); an adjustment locking sheet (211) is provided between the locking cap (221) and the first end of the operating portion (12), and the locking rod (222) enters the locking hole (223) after passing through the two insertion holes; When the locking rod (222) is extended into the locking position of the locking hole (223), the locking cap (221) moves along with the locking rod (222) and drives the two adjusting locking pieces (211) to approach each other, thereby reducing the diameter of the adjusting locking ring (21) and gradually locking the connecting rod (23); when the locking position is reached, the diameter of the adjusting locking ring (21) is the smallest and the connecting rod (23) is locked.

4. The navigation reduction and reduction maintenance device for long bone fractures according to claim 3, It is characterized in that The locking rod (222) is a threaded rod, the locking hole (223) is a threaded hole, and the position of the threaded rod in the threaded hole is adjusted by rotating the locking cap (221); or, an elastic locking protrusion is provided on the locking rod (222); a locking groove is correspondingly provided in the locking hole (223); when the locking protrusion enters the locking groove, the position of the locking ring (21) is adjusted to lock the connecting rod (23).

5. The navigation reduction and reduction maintenance device for long bone fractures according to claim 3, It is characterized in that The adjustment locking piece (211) comprises a circular piece having a diameter greater than or equal to the diameter of the first end of the operating part (12); a through hole (212) is arranged at the center of the circular piece.

6. The navigation reduction and reduction maintenance device for long bone fractures according to claim 1, It is characterized in that Anti-drop caps (231) are arranged at two ends of the connecting rod (23), and at least one of the anti-drop caps (231) is arranged to be detachable.

7. The navigation reduction and reduction maintenance device for long bone fractures according to claim 3, It is characterized in that A circle of anti-rotation teeth (232) is arranged at the first end of the operating portion (12), and matching anti-rotation teeth (232) are correspondingly arranged on an adjustment locking plate (211).

8. The navigation reduction and reduction maintenance device for long bone fractures according to claim 7, It is characterized in that The height of the anti-rotation teeth (232) is smaller than the distance between the two adjustment locking plates (211) in the unlocked state. In the locked state, the anti-rotation teeth (232) at the first end of the operating part (12) are in close contact with the anti-rotation teeth (232) on the adjustment locking plates (211).

9. A navigation reduction and reduction maintenance device for long bone fractures, It is characterized in that It comprises a reduction and reduction maintenance device as claimed in any one of claims 1 to 8, a navigation tracking structure and a display device for tracking the real-time position of the reference frame (3); A reference frame (3) with an NDI ball is arranged on each of the operating structures (1); when the operating structure (1) drives the broken bone to move, the reference frame (3) is synchronously caused to generate a displacement path, and the position signal of the reference frame (3) is captured by the navigation tracking structure, and the position signal is input into a display device; The display device stores a long bone fracture image registered with the reference frame (3), and displays the position change of the long bone fracture image in real time through the position signal of the reference frame (3).

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