Intramedullary Devices for the Treatment of Unstable Pertrochanteric Fractures

Study Overview
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Brief Summary
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The purpose of this study is to assess the differences between two different types of devices for the treatment of unstable pertrochanteric hip fractures. The hypothesis of this study is, that patients who are treated with the proximal femoral Nail Antirotation (PFNA) have a better outcome and lower complication rates than patients treated with the Gamma Nail (GN3).

Detailed Description
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This trial is a prospective randomized controlled study including the treatment of AO/OTA 31-A2 fractures in 200 patients with 2 different surgical devices. 100 patients are treated with a Gamma Nail 3 (GN3) (Stryker) the other 100 patients with a Proximal Femoral Nail Antirotation (PFNA) (Synthes). All surgeries are performed by trauma surgeons at a Level 1 University Hospital. One hundred patients are randomized to the gamma nail and 100 are randomized to the proximal femoral nail for treatment fixation. A 1:1 randomization is performed using sealed envelopes (200 in total), which are opened by the surgeon immediately before the operation. Patients missing an informed consent form, incomplete chart, or showing a pathologic fracture are getting excluded from final comparisons. Patients anthropometric data as well as pre-injury mobility assessments, and ASA will be documented. Furthermore the time from admission to going to surgery, surgery length, length of stay and mobility assessment at dischargement are recorded. After surgery the stay in the hospital is documented precisely and patients are scheduled for next appointments 2 weeks, 6 weeks, 3 months, 6 months and 1 year after surgery. Postoperative X-rays are measured precisely to determine the Tip-Apex Distance (TAD), the Parkers-Ratio, the Singh-Score and the Neck-Shaft-Angle of the injured and contralateral side. Rates of complications as cut-out and reoperation-rates are evaluated. All intra-operative complications are noted and included in the chart.

Official Title
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Intramedullary Devices for the Treatment of Unstable Pertrochanteric Fractures - Epidemiological Data and Rates of Complications

Conditions
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Fractures

Intervention / Treatment
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* Device: Gamma Nail 3
* Device: PFNA


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: AO/OTA 31-A2 fractures age between 18 - 100 years Signed written informed consent and agreement to attend the planned FUs Able to understand and read country national language at an elementary level Exclusion Criteria: missing informed consent form pathological fracture incomplete patient record death within one month of intervention (surgery) prior surgery to the hip polytrauma any additional fracture any implant at the same hip infection

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Gamma Nail 3<br>Gamma Nail 3 Stryker. | Device: Gamma Nail 3<br>* Patients who have sustained an unstable pertrochanteric hip fracture are getting treated by Gamma Nail 3.<br>* Other names: Gamma Nail 3 Stryker;|
| Active Comparator: PFNA<br>PFNA Antirotation Synthes | Device: PFNA<br>* Patients who have sustained an unstable pertrochanteric hip fracture are getting treated by PFNA.<br>* Other names: PFNA Antirotation Synthes;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| re-operation rate |  | time between intervention and one year after | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Screw-Cut Out | evaluation of sliding movements of the hip screw in the sense of a cut-out | time between intervention and one year after | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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GammaNail, re-operation rate, pertrochanteric fractures, PFNA, Tip-Apex-Distance, Parkers-Ratio