Post-operative mortality and factors related to mortality after bipolar hemiarthroplasty in patients with femoral neck fractures

Hip fractures are a common entity in the elderly. Hemiarthroplasty is a common treatment option for displaced neck of femur fractures and have been found to be successful in restoring mobility, reducing pain and improving quality of life following hip fractures in elderly. Many studies have reported that advanced age, male gender, long term stay in the intensive care unit, poor postoperative mobilization ability, a poor or dependent ADL score preoperatively, multiple comorbidities which result in a high ASA score have been associated with higher mortality. A retrospective study was done at the Department of Orthopaedics at Mahatma Gandhi Medical College and Research Institute, Pondicherry which included all patients who underwent hemiarthroplasty (both cemented and uncemented) from 2017-2020. The details of patients satisfying the inclusion criteria were obtained from the medical records department and were analysed by a single investigator. In case the subjects had not reviewed following surgeries, details were obtained by telephonic communication. In our study of 40 patients, mortality was observed in 4 patients which included 3 females and 1 male. It was also observed that mortality was high between the ages of 61-80 years, patients with multiple comorbidities and patients with high ASA scores. The hazard ratio was calculated for 3 parameters namely age, time to surgery and surgical duration and is 1.014, 0.842 and 0.984 respectively but this was not found to be statistically significant. This may due to the small sample size and retrospective nature of our study.