Background: Urodynamics study is the proper method to evaluate the degree of bladder outlet obstruction (BOO) and the status of detrusor contractility during voiding. Both BOO and DU cause a decreased urinary flow rate and increased post void residual urine volume (PVR). Recent studies show diverse recommendations about the value of preoperative UDS in patients with chronic urinary retention. Aim of the work: Identify preoperative UDS criteria upon which we can properly expect the short term postoperative outcome after prostatectomy in patients with chronic urinary retention.
Patients and methods: Sample of 30 patients were included in our study diagnosed with benign prostatic enlargement (BPE) and complicated with chronic urinary retention (CUR). They underwent evaluation by preoperative UDS and post prostatectomy PVR and uroflowmetry. Results: When correlating preoperative UDS with postoperative PVR, the presence of normal bladder sensation and evidence of obstruction according to URA nomogram were an indicator of postoperative significant reduction in PVR. Also, correlating preoperative UDS with postoperative maximum flow rate, the presence of normal bladder sensation was an indicator of postoperative significant rise in Q-max. Conclusion: Normal bladder sensitivity and obstructed patients according to Abrams - Griffiths (AG) and the Schäfer pressure/flow (LinPURR) nomograms are strong predictors of operative success in patients with chronic urinary retention. Thus, urodynamic evaluation should be systematically indicated for patients with chronic retention and BPE when considering surgical treatment.