Femoral intramedullary nail hole positioner

Abstract

The utility model is applicable to the technical field of medical instruments, and discloses a femoral intramedullary nail hole positioner which is characterized in that the outer side of a fixing sleeve is fixedly connected with the outer side of a fixing frame, and an intramedullary nail hole fixing rod sleeve is slidably sleeved on the outer side edge of the fixing sleeve; an intramedullary nail hole fixing rod is fixedly installed on the side, away from the fixing sleeve, of the intramedullary nail hole fixing rod sleeve, an elastic mechanism is arranged on the outer side of the intramedullary nail hole fixing rod, a pushing mechanism is arranged in the intramedullary nail hole fixing rod and is in transmission connection with the elastic mechanism, and the side edge of the fixing frame is slidably sleeved with a positioning rod. A connecting sleeve is fixedly installed on the side, away from the fixing frame, of the positioning rod, a positioning needle is fixedly installed in the connecting sleeve in a penetrating mode, and the interior of the positioning needle is hollow. According to the technical scheme, the positioning needle and a nail hole in the intramedullary nail can be synchronously located at the same horizontal position, and therefore a drill bit of an electric drill can stretch into the positioning needle conveniently to position the nail hole of the intramedullary nail.

Description

Technical Field

[0001] This utility model applies to the field of medical device technology, and in particular relates to a femoral intramedullary nail hole locator. Background Technology

[0002] Femoral fractures are currently a common traumatic injury in clinical practice, especially among the elderly, whose incidence increases significantly due to osteoporosis. Intramedullary femoral nailing, as an effective internal fixation device, has become one of the standard methods for treating femoral fractures due to its superior biomechanical properties and minimal invasiveness to the medullary cavity. However, accurate positioning of the nail holes is crucial for surgical success and is also one of the more challenging aspects of this procedure.

[0003] However, traditional positioning methods, which use two identical intramedullary nails for internal and external comparison, while effective to some extent, suffer from drawbacks such as prolonged positioning time and extended surgical duration. Furthermore, while many surgical instruments exist for positioning, their complex structures limit their practical use during surgery. Therefore, we propose a femoral intramedullary nail hole locator. Utility Model Content

[0004] The main purpose of this invention is to provide a femoral intramedullary nail hole locator, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] The femoral intramedullary nailing hole locator includes a fixing sleeve and a fixing frame. The outer side of the fixing sleeve and the outer side of the fixing frame are fixedly connected. An intramedullary nailing hole fixing rod sleeve is slidably sleeved on the outer side of the fixing sleeve. An intramedullary nailing hole fixing rod is fixedly installed on the side of the intramedullary nailing hole fixing rod sleeve away from the fixing sleeve.

[0007] An elastic mechanism is provided on the outside of the intramedullary nail hole fixing rod, and a pushing mechanism is provided inside the intramedullary nail hole fixing rod, and the pushing mechanism and the elastic mechanism are connected in a transmission manner;

[0008] A positioning rod is slidably sleeved on the side of the fixed frame. A connecting sleeve is fixedly installed on the side of the positioning rod away from the fixed frame. A positioning pin is fixedly installed through the inside of the connecting sleeve, and the inside of the positioning pin is hollow.

[0009] A frame column is fixedly installed between the outer side of the intramedullary nail hole fixing rod sleeve and the outer side of the positioning rod.

[0010] By adopting the above technical solution, the intramedullary nail hole fixing rod sleeve and positioning rod are connected by the frame column, and the position is fixed by the automatic insertion of the nail hole in conjunction with the elastic mechanism, so that the positioning pin can be in the same horizontal position as the insertion rod. At this time, the positioning pin can be synchronously in the same horizontal position as the nail hole inside the intramedullary nail, which makes it easier for the electric drill bit to be inserted to position the intramedullary nail hole.

[0011] As an optional solution to the technical solution of this application, the elastic mechanism includes a push spring and a plug rod. The plug rod is slidably inserted through the inside of the intramedullary nail hole fixing rod sleeve on the side away from the intramedullary nail hole fixing rod sleeve. A transmission plate is fixedly installed on the side of the plug rod, and the transmission plate is slidably installed inside the intramedullary nail hole fixing rod. The push spring is movably sleeved on the side of the intramedullary nail hole fixing rod sleeve away from the intramedullary nail hole fixing rod sleeve, and the side of the push spring is movably attached to the outside of the transmission plate.

[0012] By adopting the above technical solution, the spring can push the transmission plate and the insertion rod, so that when the insertion rod moves to the intramedullary nail hole, it can be automatically pushed into the nail hole for position fixation.

[0013] As an optional solution to the technical solution of this application, the pushing mechanism includes a connecting rod and a push plate. The connecting rod is fixedly installed on the side of the transmission plate, and the connecting plate is movably disposed inside the fixing sleeve, the intramedullary nail hole fixing rod sleeve and the intramedullary nail hole fixing rod. The push plate is slidably installed on the side of the fixing sleeve, and the side of the push plate is fixedly connected to the side of the connecting rod.

[0014] By adopting the above technical solution, the transmission plate and the push plate are connected by a connecting rod, so that the operator can push the push plate from the outside of the fixed sleeve and adjust the position of the plug rod.

[0015] As an optional solution to the technical solution of this application, a sliding groove is provided inside the side of the fixed sleeve, and the connecting rod is slidably inserted into the sliding groove.

[0016] By adopting the above technical solution, the connecting rod is guided and slid by the sliding groove, so that when the operator pushes the push plate, the connecting rod can only drive the transmission plate to move synchronously along the opening direction of the sliding groove, thereby driving the plug-in rod to move horizontally.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The femoral intramedullary nail hole locator of this application comprises a slidable intramedullary nail hole fixing rod sleeve and a positioning rod respectively provided on the outside of the fixing sleeve and the fixing frame. The fixing rod sleeve and the positioning rod are connected by a frame column. When the fixing rod sleeve is pushed, causing the elastic insertion rod on the side to move synchronously inside the intramedullary nail, the positioning rod and its side positioning pin move synchronously and the same distance outside the intramedullary nail. Then, under the pushing action of the push spring on the insertion rod, the insertion rod can be sprung into the nail hole inside the intramedullary nail, so that the positioning pin can be placed at the same horizontal position as the insertion rod. At this time, the positioning pin can be synchronously placed at the same horizontal position as the nail hole inside the intramedullary nail, which facilitates the insertion of the electric drill bit to locate the intramedullary nail hole. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the femoral intramedullary nail hole locator of this utility model;

[0020] Figure 2 This is a top view sectional diagram of the overall structure of the femoral intramedullary nail hole locator of this utility model;

[0021] Figure 3 This is a schematic diagram of the overall left-side side view of the femoral intramedullary nail hole locator of this utility model;

[0022] Figure 4 This is a schematic diagram of the overall right-side side view of the femoral intramedullary nail hole locator of this utility model.

[0023] Reference numerals: 1. Fixing sleeve; 2. Intramedullary nail hole fixing rod sleeve; 3. Intramedullary nail hole fixing rod; 4. Insertion rod; 5. Frame column; 6. Fixing frame; 7. Positioning rod; 8. Connecting sleeve; 9. Positioning pin; 10. Transmission plate; 11. Push spring; 12. Connecting rod; 13. Hand push plate; 14. Sliding groove. Detailed Implementation

[0024] like Figure 1-4As shown, this utility model provides a technical solution: a femoral intramedullary nail hole locator, wherein the outer side of the fixing sleeve 1 and the outer side of the fixing frame 6 are fixedly connected, the outer side of the fixing sleeve 1 is slidably fitted with an intramedullary nail hole fixing rod sleeve 2, the side of the intramedullary nail hole fixing rod sleeve 2 away from the fixing sleeve 1 is fixedly installed with an intramedullary nail hole fixing rod 3, the outer side of the intramedullary nail hole fixing rod 3 is provided with an elastic mechanism, the inner side of the intramedullary nail hole fixing rod 3 is provided with a pushing mechanism, and the pushing mechanism and the elastic mechanism are connected in a transmission manner, the side of the fixing frame 6 is slidably fitted with a positioning rod 7, the side of the positioning rod 7 away from the fixing frame 6 is fixedly installed with a connecting sleeve 8, the inner side of the connecting sleeve 8 is fixedly installed with a positioning pin 9, and the inner side of the positioning pin 9 is hollow, and a frame column 5 is fixedly installed between the outer side of the intramedullary nail hole fixing rod sleeve 2 and the outer side of the positioning rod 7.

[0025] In this technical solution (through Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown), the elastic mechanism includes a push spring 11 and a plug rod 4. The plug rod 4 is slidably inserted through the side of the intramedullary nail hole fixing rod 3 away from the intramedullary nail hole fixing rod sleeve 2. A transmission plate 10 is fixedly installed on the side of the plug rod 4, and the transmission plate 10 is slidably installed inside the intramedullary nail hole fixing rod 3.

[0026] In this technical solution (through Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a push spring 11 is movably sleeved on the side of the intramedullary nail hole fixing rod sleeve 2 away from the intramedullary nail hole fixing rod sleeve 2, and the side of the push spring 11 is movably attached to the outside of the transmission plate 10.

[0027] In this technical solution (through Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the pushing mechanism includes a connecting rod 12 and a push plate 13. The connecting rod 12 is fixedly installed on the side of the transmission plate 10, and the connecting plate is movably disposed inside the fixed sleeve 1, the intramedullary nail hole fixing rod sleeve 2, and the intramedullary nail hole fixing rod 3. The push plate 13 is slidably installed on the side of the fixed sleeve 1, and the side of the push plate 13 is fixedly connected to the side of the connecting rod 12.

[0028] In some technical solutions (through Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a sliding groove 14 is provided inside the side of the fixed sleeve 1, and the connecting rod 12 is slidably inserted into the sliding groove 14.

[0029] During operation, after the intramedullary nail hole fixing rod 3 is inserted into the intramedullary nail for positioning the required nail hole, the hand push plate 13 is pushed. Under the transmission action of the connecting rod 12 and the guiding sliding action of the sliding groove 14 on the connecting rod 12, the transmission plate 10 moves horizontally inside the intramedullary nail hole fixing rod 3. This compresses the push spring 11 and simultaneously moves the insertion rod 4 into the intramedullary nail hole fixing rod 3, pushing the sleeve 2 of the intramedullary nail hole fixing rod 3. This causes the intramedullary nail hole fixing rod 3 to move synchronously inside the intramedullary nail. Combined with the connecting transmission action of the frame column 5, the positioning rod 7 can be moved along the fixed frame 6. The insertion rod 4 moves synchronously and at the same distance from the outside of the intramedullary nail until it moves inside the nail hole. Then, under the restoring push of the push spring 11, the insertion rod 4 can be pushed and inserted into the nail hole inside the intramedullary nail to fix its position. At this time, the positioning rod 7, which moves synchronously with it, also moves the positioning pin 9 to the outside of the nail hole. The operator can use an electric drill to drill into the nail hole of the intramedullary nail to complete the rapid positioning of the nail hole. When it is necessary to position other holes, the above operation steps are repeated to move the insertion rod 4 step by step and insert it into different nail holes in sequence to complete the multi-hole positioning of the nail holes.

Claims

1. A femoral intramedullary nail hole locator, comprising a fixing sleeve (1) and a fixing frame (6), characterized in that: The outer side of the fixed sleeve (1) is fixedly connected to the outer side of the fixed frame (6). The inner medullary nail hole fixing rod sleeve (2) is slidably sleeved on the outer side of the fixed sleeve (1). The inner medullary nail hole fixing rod (3) is fixedly installed on the side of the inner medullary nail hole fixing rod sleeve (2) away from the fixed sleeve (1). An elastic mechanism is provided on the outside of the intramedullary nail hole fixing rod (3), and a pushing mechanism is provided inside the intramedullary nail hole fixing rod (3), and the pushing mechanism and the elastic mechanism are connected in a transmission manner; The fixed frame (6) is slidably sleeved with a positioning rod (7), and a connecting sleeve (8) is fixedly installed on the side of the positioning rod (7) away from the fixed frame (6). A positioning pin (9) is fixedly installed through the inside of the connecting sleeve (8), and the inside of the positioning pin (9) is hollow. A frame column (5) is fixedly installed between the outer side of the intramedullary nail hole fixing rod sleeve (2) and the outer side of the positioning rod (7).

2. The femoral intramedullary nail hole locator according to claim 1, characterized in that: The elastic mechanism includes a push spring (11) and a plug rod (4). The plug rod (4) is slidably inserted through the side of the intramedullary nail hole fixing rod (3) away from the intramedullary nail hole fixing rod sleeve (2). A transmission plate (10) is fixedly installed on the side of the plug rod (4), and the transmission plate (10) is slidably installed inside the intramedullary nail hole fixing rod (3).

3. The femoral intramedullary nail hole locator according to claim 1, characterized in that: A push spring (11) is movably sleeved on the side of the intramedullary nail hole fixing rod sleeve (2) away from the intramedullary nail hole fixing rod sleeve (2), and the side of the push spring (11) is movably attached to the outside of the transmission plate (10).

4. The femoral intramedullary nail hole locator according to claim 2, characterized in that: The pushing mechanism includes a connecting rod (12) and a push plate (13). The connecting rod (12) is fixedly installed on the side of the transmission plate (10), and the connecting plate is movably disposed inside the fixed sleeve (1), the intramedullary nail hole fixing rod sleeve (2) and the intramedullary nail hole fixing rod (3). The push plate (13) is slidably installed on the side of the fixed sleeve (1), and the side of the push plate (13) is fixedly connected to the side of the connecting rod (12).

5. The femoral intramedullary nail hole locator according to claim 1, characterized in that: The fixed sleeve (1) has a sliding groove (14) inside its side, and the connecting rod (12) is slidably inserted into the sliding groove (14).

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