A retrospective study was conducted on the duration of
pyuria after transurethral resection of the prostate (
TURP) and the factors affecting the duration in 273 patients, who were diagnosed as having
benign prostatic hyperplasia (BPH) with postoperative resolution of
pyuria among those who underwent
TURP over the last ten years at our clinic. In the 273 patients, the mean (+/- SD) weight of the resected prostate was 13.2 +/- 10.2 g (range : 1-52 g), the mean operating time was 74.3 +/- 29.8 min (25-215 min), the duration of
pyuria was 110.6 +/- 38.3 days (23-273 days), and the resected weight to operating time ratio was 0.172 +/- 0.093 g/min (0.018-0.500 g/min). There was a significant correlation between the duration of
pyuria and the patient's age, resected weight, operating time, or resected weight/operating time ratio, resected weight being the most important factor. The surgeon, the postoperative
antibiotics used, and the preoperative existence of
pyuria did not have any significant effect on the duration of postoperative
pyuria. Investigation after stratification by the resected weight in 10 g increments suggested that a shorter operating time was important to reduce the duration of postoperative
pyuria, particularly in BPH patients with a resected weight of 20-29 g.