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Screw guider for open reduction of femoral neck fracture and use method of screw guider

A femoral neck fracture and guide technology, applied in the field of medical devices, can solve problems such as necrosis of the femoral head, it is difficult for the operator to meet the requirements of parallelism, cortical edge, inverted triangle arrangement, nonunion of the femoral neck, etc. quality, reducing the probability of nonunion and necrosis of the femoral head, and reducing the number of fluoroscopy

Pending Publication Date: 2022-08-09
XIANGYA HOSPITAL CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even with fluoroscopy surgery, it is difficult for the surgeon to meet the requirements of parallel, close to the cortical edge of the bone, and inverted triangle arrangement
If this requirement is not met, it is prone to poor screw position, resulting in nonunion of the femoral neck and necrosis of the femoral head.

Method used

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  • Screw guider for open reduction of femoral neck fracture and use method of screw guider
  • Screw guider for open reduction of femoral neck fracture and use method of screw guider
  • Screw guider for open reduction of femoral neck fracture and use method of screw guider

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0038] see Figure 1 to Figure 4 , the screw guide for open reduction of femoral neck fractures provided in the first embodiment includes an inner guide 1, an outer guide 2, a first positioning pin 3, a second positioning pin 4, a first guide pin 5, a second Guide needle 6 and third guide needle 7. The inner guide 1 includes a fixing part 11 and a measuring device 12. The fixing part 11 is used for fixing at the position of the intertrochanteric line of the femoral neck. The measuring device 12 includes a connecting part 121, a first caliper 122 and a second caliper 123. The connecting part 121 One end is connected to the fixing part 11, the other end is installed with the first caliper 122 and the second caliper 123, the connecting part 121 is arranged at the midpoint of the first caliper 122 and the second caliper 123, the first caliper 122 and the second caliper 123 can be Synchronized telescopic adjustment to both ends relative to the midpoint position to clamp the upper ...

no. 2 example

[0046] see Figure 5 to Figure 8 The main difference between the second embodiment and the first embodiment is that the second positioning pin 4 of the screw guide of the first embodiment is fixed in the second positioning groove 112 of the fixing part 11, while the screw guide of the second embodiment is The second positioning pin 4 of the device is fixed on the first caliper 122, and the distance between the latching foot of the first caliper 122 and the second positioning pin 4 is the thickness of the upper cortex, and the second positioning groove 112 is a long strip. The adjustment holes allow the first caliper 122 and the second caliper 123 to adjust the measurement distance so that the second positioning pin 4 has a corresponding movable space. The first positioning needle 3 is located at the midpoint of the first caliper 122 and the second caliper 123 . In this way, there is no need to read the width value of the femoral neck to calculate the corresponding hole positi...

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Abstract

The invention provides a screw guider and a using method thereof.The screw guider comprises an inner guiding piece, an outer guiding piece, a first positioning pin, a second positioning pin, a first guide pin, a second guide pin and a third guide pin, the inner guiding piece comprises a fixing part and a measurer, the measurer comprises a connecting part, a first caliper and a second caliper, one end of the connecting part is connected to the fixing part, and the other end of the connecting part is connected to the second caliper. A first positioning groove and a second positioning groove are formed in the fixing part so that the first positioning needle and the second positioning needle can penetrate through and be inserted into the joint of the femoral head and the neck to be fixed, and a first positioning hole and a second positioning hole are formed in the outer guiding piece so that the outer guiding piece can be arranged on the first positioning needle and the second positioning needle in a sleeved mode. A first adjusting hole, a second adjusting hole and a third adjusting hole are formed in the outer guide piece, so that a first guide needle, a second guide needle and a third guide needle can be inserted into the femoral head respectively. According to the guider, the perspective frequency can be reduced, the hollow screw can be accurately implanted, and the requirements of parallelism, welt and inverted triangle are met.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a screw guide for open reduction of femoral neck fractures. Background technique [0002] Femoral neck fractures are common and frequently-occurring diseases, and fractures are prone to nonunion or femoral head necrosis. Although elderly patients can undergo hip replacement, for younger patients, closed reduction and cannulated screw internal fixation are usually used to preserve the femoral head as much as possible. . The classic solution that has been verified by evidence-based medicine is 3 parallel screws with an inverted "pin" distribution, which are attached to the cortical edge of the femoral neck for fixation. For vertical fractures, lateral screws and medial support plates are required. If the mechanical strength of the two femoral neck fractures is good, the healing rate is high, and the probability of femoral head necrosis will be greatly reduced. The qualit...

Claims

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Application Information

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IPC IPC(8): A61B17/90
CPCA61B17/88A61B2017/564
Inventor 龙承朱勇龙海涛林涨源刘劲高敏杰
Owner XIANGYA HOSPITAL CENT SOUTH UNIV
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