Is treatment of geriatric hip fracture patients cost-covering? Results of a prospective study conducted at a German University Hospital.

INTRODUCTION: Hip fractures have increased medical and socio-economic importance due to demographic transition. Information concerning direct treatment costs and their reimbursement in Germany is lacking. MATERIALS AND METHODS: Four hundred two hip fracture patients older than 60 years of age were observed prospectively at a German University Hospital. Treatment costs were determined with up to 196 cost factors and compared to the reimbursement. Finally, statistical analysis was performed to identify clinical parameters influencing the cost-reimbursement relation. RESULTS: Treatment costs were 8853 € (95% CI 8297-9410 €), while reimbursement was 8196 € (95% CI 7707-8772 €), resulting in a deficit of 657 € (95% CI 143-1117 €). Bivariate analysis showed that the cost-reimbursement relation was negatively influenced mainly by higher age, higher ASA score, readmission to the intensive care unit (ICU) and red blood cell transfusion. Adjusted for other parameters, readmission to the ICU was a significant negative predictor (- 2669 €; 95% CI - 4070 to - 1268 €; p < 0.001), while age of 60-75 years was a positive predictor for the cost-reimbursement relation (1373 €; 95% CI 265-2480 €; p = 0.015). CONCLUSIONS: Treatment of geriatric hip fracture patients in a university hospital in Germany does not seem to be cost-covering. Adjustment of the reimbursement for treatment of complex hip fracture patients should be considered.

Internal fixation of acetabular fractures in an older population using the TIMI approach - Midterm results of a prospective study.

INTRODUCTION: The incidence of geriatric acetabular fractures continues to increase due to demographic changes. In the elderly, anterior column fractures are common, and standard approaches are associated with a considerable risk for surgery-associated complications. Therefore, a minimally invasive approach was developed in our department. The aim of this study was to examine early and mid-term results regarding the use of this novel two-incision minimally invasive (TIMI) approach in patients aged over 55 years with acetabular fractures. METHODS: From July 2007 to April 2014, 47 patients aged over 55 years were treated via the TIMI approach; these patients were included in the present prospective study. The patients' characteristics, data, and early phase of care were assessed during acute care. A radiological evaluation comprised pre- and postoperative CT scans and x-rays, including Judet views at follow-up. Follow-up examinations were performed after 6 and 24 months and comprised a clinical and radiological examination and an evaluation of hip function (Harris Hip Score) and health-related quality of life (EQ-5D). RESULTS: The mean age of the patients was 74±11years, with a gender ratio of 35/12 (m/f). The average operation time was 93±30min, and perioperative blood loss amounted to 858±463ml. In total, five (11%) complications associated with the operative procedure occurred, and revision surgery was necessary in three patients. We observed no wound infections, abdominal wall hernias or cases of heterotopic ossification in our sample. The Harris Hip Score at six months after surgery was 81, and it slightly improved to 84 after 24 months. The mean EQ5D index was 0.91 at six months after surgery and 0.92 at 24 months after surgery. CONCLUSION: The TIMI approach represents a valuable alternative to the ilioinguinal and modified Stoppa approach for the treatment of acetabular fractures located in the anterior column, which are often observed in geriatric patients. LEVEL OF EVIDENCE: Therapeutic Level II (Prospective cohort study).

Rotationally Stable Screw-Anchor With Locked Trochanteric Stabilizing Plate Versus Proximal Femoral Nail Antirotation in the Treatment of AO/OTA 31A2.2 Fracture: A Biomechanical Evaluation.

OBJECTIVES: Third-generation cephalomedullary nails currently represent the gold standard in the treatment of unstable trochanteric femur fractures. Recently, an extramedullary rotationally stable screw-anchor system (RoSA) has been developed. It was designed to combine the benefits of screw and blade and to improve stability using a locked trochanteric stabilizing plate (TSP). The purpose of this study was to compare the biomechanical behavior of RoSA/TSP and the proximal femoral nail antirotation (PFNA). METHODS: Standardized AO/OTA 31A2.2 fractures were induced by an oscillating saw in 10 paired human specimens (n = 20; mean age = 85 years; range: 71-96 years). The fractures were stabilized by either the RoSA/TSP (Koenigsee Implants, Allendorf, Germany) or the PFNA (DePuy Synthes, Zuchwil, Switzerland). Femurs were positioned in 25 degrees of adduction and 10 degrees of posterior flexion and were cyclically loaded with axial sinusoidal pattern at 0.5 Hz, starting at 300 N, with stepwise increase by 300 N every 500 cycles until bone-implant failure occurred. After every load step, the samples were measured visually and radiographically. Femoral head migration was assessed. RESULTS: The stiffness at the load up to the clinically relevant load step of 1800 N (639 ± 378 N/mm (RoSA/TSP) vs. 673 ± 227 N/mm (PFNA); P = 0.542) was comparable, as was the failure load (3000 ± 787 N vs. 3780 ± 874 N; P = 0.059). Up to 1800 N, no femoral head rotation, head migration, or femoral neck shortening were observed either for RoSA/TSP or PFNA. Whereas failure of the PFNA subsumed fractures of the greater trochanter and the lateral wall, a posterior femoral neck fracture with a significantly increased femoral neck shortening (1.7 mm vs. 0 mm; P = 0.012) was the cause of failure with RoSA/TSP. This specific kind of failure was induced by a femoral neck weakening caused by the posterior TSP stabilizing screw. CONCLUSIONS: There was no significant difference in biomechanical properties between the RoSA/TSP and the PFNA for the fracture pattern tested. However, failure modes differed between the 2 implants with greater femoral neck shortening observed in the RoSA/TSP group.