A Novel Device for Accurate Guide wire Placement in Cannulated Screw Fixation of Femoral Neck Fracture:A Pilot Study

Mapping Intimacies ◽

10.21203/rs.3.rs-57323/v1 ◽

2020 ◽

Author(s):

bu-fang ren ◽

quan-ping Ma ◽

xin lv

Keyword(s):

Femoral Neck ◽

Femoral Neck Fracture ◽

Screw Fixation ◽

Kirschner Wire ◽

Operation Time ◽

Conventional Technique ◽

Novel Device ◽

Neck Fracture ◽

Guide Device ◽

Experimental Group

Abstract Background: Accurate placement of cannulated screws is the key to stable fixation of the femoral neck fracture. A novel device was developed to improve the accuracy of screw placement.Methods: 20 synthetic femoral bones were divided into conventional technique group and the experimental group. Three Kirschner wire were inserted into the femoral neck fracture by conventional technique or by the simple guide device. The operative time, total drilling times and fluoroscopic frequency were evaluated.Results: By using the guide device, the fluoroscopy and operation time of the experimental group were shorter that of the conventional method. The total drilling times with the simple guide device were significantly lower than the conventional technique group.Conclusions: This device can help trauma surgeons shorten the surgical time and reduce radiation exposure time. The use of this guide device can make screw fixation for femoral neck fracture easier.

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A novel device for accurate placement of guide wire in cannulated screw fixation of femoral neck fracture: A pilot study

10.21203/rs.3.rs-57323/v3 ◽

2020 ◽

Author(s):

Bu-Fang Ren ◽

Quan-Ping Ma ◽

Xin Lv

Keyword(s):

Femoral Neck ◽

Femoral Neck Fracture ◽

Screw Fixation ◽

Kirschner Wire ◽

Conventional Technique ◽

The Novel ◽

Novel Device ◽

Neck Fracture ◽

Guide Device ◽

Experimental Group

Abstract Background: Accurate placement of cannulated screws is the key to stable fixation of the femoral neck fracture. A novel device was developed to improve the accuracy of screw placement. Methods: 20 synthetic femoral bones were divided into conventional technique group and the experimental group. Three Kirschner wire were inserted into the femoral neck fracture by conventional technique or by the novel guide device. The operative time, total drilling attempts and fluoroscopic frequency were evaluated.Results: By using the guide device, the fluoroscopy and operation time of the experimental group were shorter that of the conventional method. The total drilling attempts with the novel guide device were significantly lower than the conventional technique group.Conclusion: This device can help trauma surgeons shorten the surgical time and reduce radiation exposure time. The use of this guide device can make screw fixation for femoral neck fracture easier.

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A novel device for accurate placement of guide wire in cannulated screw fixation of femoral neck fracture: A pilot study

10.21203/rs.3.rs-57323/v2 ◽

2020 ◽

Author(s):

bu-fang ren ◽

quan-ping Ma ◽

xin lv

Keyword(s):

Femoral Neck ◽

Femoral Neck Fracture ◽

Screw Fixation ◽

Kirschner Wire ◽

Conventional Technique ◽

The Novel ◽

Novel Device ◽

Neck Fracture ◽

Guide Device ◽

Experimental Group

Abstract Background: Accurate placement of cannulated screws is the key to stable fixation of the femoral neck fracture. A novel device was developed to improve the accuracy of screw placement. Methods: 20 synthetic femoral bones were divided into conventional technique group and the experimental group. Three Kirschner wire were inserted into the femoral neck fracture by conventional technique or by the novel guide device. The operative time, total drilling attempts and fluoroscopic frequency were evaluated.Results: By using the guide device, the fluoroscopy and operation time of the experimental group were shorter that of the conventional method. The total drilling attempts with the novel guide device were significantly lower than the conventional technique group.Conclusion: This device can help trauma surgeons shorten the surgical time and reduce radiation exposure time. The use of this guide device can make screw fixation for femoral neck fracture easier.

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A Simple and Effective Guide Device for Femoral Neck Fracture Fixed With Cannulated Screw Fixation

10.21203/rs.3.rs-37005/v1 ◽

2020 ◽

Author(s):

bufang Ren ◽

quanping ma ◽

jian gao ◽

xin lv

Keyword(s):

Femoral Neck ◽

Femoral Neck Fracture ◽

Operative Time ◽

Screw Fixation ◽

Kirschner Wire ◽

Operation Time ◽

Conventional Technique ◽

Neck Fracture ◽

Guide Device ◽

Experimental Group

Abstract Background: Accurate placement of cannulated screws is the key to stable fixation of the femoral neck fracture. A simple guide device was developed to improve the accuracy of screw placement.Methods: 40 synthetic femoral bones were divided into conventional technique group and the experimental group. Three Kirschner wire were inserted into the femoral neck fracture by conventional technique or by the simple guide device. The operative time, total drilling times and fluoroscopic frequency were evaluated.Results: By using the guide device, the fluoroscopy and operation time of the experimental group were shorter that of the conventional method. The total drilling times with the simple guide device were significantly lower than the conventional technique group. Conclusions: The use of this guide device can make screw fixation for femoral neck fracture easier. This is helpful for an inexperienced hand.

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Re-Recognition of Garden Index as a Criterion for Evaluating the Quality of Femoral Neck Fracture Reduction: An Imaging Study Based on Cadaver Specimens

10.21203/rs.3.rs-150244/v1 ◽

2021 ◽

Author(s):

Leyi Cai ◽

Wenjie Li ◽

Wenhao Zheng ◽

Jianshun Wang ◽

Xiaoshan Guo ◽

...

Keyword(s):

Femoral Head ◽

Femoral Neck ◽

Femoral Neck Fracture ◽

Kirschner Wire ◽

Imaging Study ◽

Lateral View ◽

Healthy Human ◽

Rotational Displacement ◽

Significant Difference ◽

Neck Fracture

Abstract ObjectiveTo investigate whether the Garden index can determine the rotational displacement of femoral neck fracture. MethodsTen healthy human femoral specimens were obtained. A 2.0 mm diameter Kirschner-wire was placed in the center of the femoral head. The osteotomy was perpendicular in the middle of the femoral neck. The distal osteotomy surface was indicated the angle of rotation (pronation and supination to 90°, every 10° was an interval). The X-ray of anterior-posterior and lateral view was taken at different angles according to the mark. The Garden index and other relevant data were analyzed with the PCAS system. Meanwhile, the change of the area of the femoral head fovea at different rotation angles was observed. ResultsThere was no significant difference in the Garden index in 0~30° at pronation and supination position (P>0.05). In range of 40°~90°, there was a statistical difference in the Garden index (P<0.05). With the increase of the pronation angle, the area of the femoral head fovea is gradually reduced; as the angle of the supination increases, the area of the femoral head fovea is gradually increased. ConclusionThe Garden Index cannot accurately determine the rotational displacement of the femoral neck fracture during the pronation or supination range of 0~30°. Changes in the area of the femoral head fovea can help determine the rotational displacement of the femoral neck fracture.Level of EvidenceLevel V.

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Calcar buttressed screw fixation for femoral neck fracture

International Journal of Research in Orthopaedics ◽

10.18203/issn.2455-4510.intjresorthop20185337 ◽

2018 ◽

Vol 5 (1) ◽

pp. 145

Author(s):

K. K. Arvind Manoj ◽

R. Karthik ◽

A. Vishnu Sankar

Keyword(s):

Femoral Neck ◽

Functional Outcome ◽

Femoral Neck Fracture ◽

Screw Fixation ◽

Femoral Neck Fractures ◽

Fixation Strength ◽

Harris Hip Score ◽

Average Period ◽

Excellent Outcome ◽

Neck Fracture

Background: The incidence of neck of femur fracture among elderly population is increasing day by day. Femoral neck fracture has always been an unsolved fracture as far as treatment and results are concerned. There are different views regarding the optimal method of internal ﬁxation in femoral neck fractures. Biomechanical data from literature suggest that calcar ﬁxation is superior to central screws placement. This study aims to analyse the functional and radiological outcome of femoral neck fractures treated by calcar buttressed screw fixation described by Filipov as biplane double supported screw fixation.Methods: This is a prospective study conducted in our institution from May 2015 to May 2018.The study included 43 patients (31 male, 12 female) with femoral neck fracture. Three 6.5-mm cannulated screws were laid in two medially diverging oblique planes. The distal and the middle screws were supported on the calcar. The distal screw had additional support on the posterior neck cortex. Patients were followed up for average period of 2 years. Functional outcome was evaluated using Harris Hip score.Results: Bone union occurred in 40 patients (93%) with average period of 3-4 months. 51.2% of cases had excellent outcome. 23.2% of cases had good and 16.3% of cases had fair outcome. 9.3% of cases ended with poor outcome. Non union was reported in 3 patients (7%) and AVN in one patient. Various factors like age, Garden and Pauwel fracture types, time of presentation and time of surgery were statistically significant to the final functional outcome in our study.Conclusions: By providing additional calcar buttress compared to conventional method, this technique of screw fixation enhances femoral neck fracture fixation strength and reduces the fixation failure.

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