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Urology. 2006 Jan;67(1):69-72.

Gyrus bipolar versus standard monopolar transurethral resection of the prostate: a randomized prospective trial.

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Department of Urology, Seconda Università di Napoli, Naples, Italy.



To compare bipolar plasmakinetic (PK) with standard monopolar transurethral resection of the prostate (TURP).


A total of 70 patients were prospectively randomized into two groups: 35 patients underwent PK TURP with the Gyrus device, and 35 patients underwent standard monopolar TURP. We evaluated the time to catheter removal and hospital discharge, operating time, blood loss, postoperative irrigation, complications, urinary flow rates, symptom relief, and postvoid residual volumes.


At baseline, the study groups were comparable in age, prostate volume, mean prostate-specific antigen value, International Prostate Symptom Score, quality-of-life score, flow rate, and postvoid residual volume. The mean catheterization time was 72 and 100 hours in the PK and standard groups, respectively. This difference was statistically significant (P <0.05), as was the difference in the time to hospital discharge. No difference was found in the mean resection time, amount of resected tissue, or variations in hemoglobin and sodium levels. The improvement in flow rate, postvoid residual volume, International Prostate Symptom Score, and quality-of-life score was comparable between the two groups at 12 months of follow-up.


In our experience, PK TURP showed comparable perioperative results to those obtained with standard TURP, but with more favorable postoperative outcomes. The resection time and blood loss were similar between the two groups, but the need for continuous bladder irrigation after surgery and time to catheter removal and hospital discharge were significantly shorter in the PK group.

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