DRIVING REACTION TIMES FOLLOWING TOTAL HIP ARTHROPLASTY – FINDINGS AND RECOMMENDATIONS
2011
The time at which patients should drive following total hip replacement (THR) is dependant upon recovery and the advice they are given. The Driver Vehicle and Licensing Agency (DVLA) do not publish recommendations following THR and insurance companies usually rely on medical instruction.
Brake reaction times for patients undergoing THR were measured before and four, six and eight weeks after surgery using a vehicle-driving simulator. Patients were prospectively recruited. Ethical approval was granted.
Participants included eleven males and nine females, mean age 69 years. Side of surgery, frequency of driving and type of car (automatic or manual) were documented. Patients with postoperative complications were excluded. No adverse events occurred during the study.
Statistical analysis using Friedman’s test demonstrated a statistically significant difference (P=0.015) in reaction times across the four time periods. Wilcoxon test demonstrated a highly significant difference between initial and six week mean results (P=0.003), and between four and six week results (P=0.001). No significant difference was found between six and eight weeks.
Our data suggests reaction times improve until week six and significantly between week four to six. Patients making an uncomplicated recovery should be considered safe to drive by week six.
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