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A Journal on Nephrology and Urology

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Minerva Urologica e Nefrologica 2010 June;62(2):151-6

language: English

Green light laser (KTP, 80 W) for the treatment of benign prostatic hyperplasia

Skriapas K. 1, Hellwig W. 1, Samarinas M. 2, Witzsch U. 1, Becht E. 1

1 Department of Urology and Pediatric Urology, Krankehaus Nordwest, Stiftung zum Heiligen Geist, Frankfurt am Main, Germany
2 Department of Pediatric Surger, Karamandanio Pediatric General Hospital, Patras, Greece


AIM: An attractive alternative for the management of benign prostate hyperplasia (BPH) is the use of 80 W potassium titanyl phosphate (KTP). We evaluated the efficacy and safety of this procedure in patients with bladder outlet obstruction (BOO).
METHODS: A total of 171 patients with obstructive BPH underwent the 80 W potassium-titanyl-phosphate laser procedures. Preoperatively the international prostate symptom score (IPSS), the maximal urinary flow rate (Qmax), prostate volume and the post-void residual urine volume (PVR) were determined. Perioperative complications and postoperative blood loss, hospitalization, catheterization time, Qmax and PVR were also assessed.
RESULTS: From the 171 patients, who underwent KTP laser procedure, 143 have been evaluated. The mean preoperative prostate volume was 43.9±17.1 (15-76). Eighty-nine patients (62.2%) were on chronic oral anticoagulant therapy (Coumarin or Aspirin 100). The mean applied energy was 170±65 kJ (100-275). There was no significant blood loss or fluid absorption during the KTP procedure. The mean Qmax values preoperatively and postoperatively were 3.4±4.3 and 16.3±7.3, respectively. PVR decreased from 74±47.7 mL preoperatively, to 16.6±21.5 mL postoperatively. Catheteriza-tion time was 1.4±0.8 days (0-5).
CONCLUSION: KTP laser for the prostate represents a safe and effective treatment for patients with BPH. The procedure has a low rate of postoperative complications. It can be used for high risk patients especially for them who are receiving oral anticoagulation therapy.

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