men older than 70 y.o after hip arthroplasty, all patients after spinal surgery, and patients with urinary symptoms. Results.-Screening concerned 18% of hospitalised patients in our unit. Thirtysix percent of evaluated patients had a urinary retention: 40% if men older than 70 after hip arthroplasty, 30.76% of patients after spinal surgery. Fifty percent of patients with retention had a positive urinary bacteriologic exam. Discussion and conclusion.-Prevalence of urinary retention after orthopaedic surgery and infectious risk. References [1] Balderi T, Carli F. Urinary retention after total hip arthroplasty. Minerva Anestesiol 2010;76(2):120-30. [2] Cong ML, Gong WM, et al. Urodynamic study of bladder function for patients with lumbar spinal stenosis treated by surgical decompression. http://dx.
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