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Park, Cho, and Joo: Potassium-Titanyl-Phosphate Laser Photoselective Vaporization of the Prostate in Patients with Benign Prostatic Hyperplasia with Detrusor Underactivity: Influence on Detrusor Pressure
Original Article
New Technology/Lasers in Urology
Korean Journal of Urology

Korean Journal of Urology 2009; 50(12): 1193-1197.

Published online: 18 December 2009

DOI: https://doi.org/10.4111/kju.2009.50.12.1193

Potassium-Titanyl-Phosphate Laser Photoselective Vaporization of the Prostate in Patients with Benign Prostatic Hyperplasia with Detrusor Underactivity: Influence on Detrusor Pressure

Kyung Seo Park, Young Sam Cho, Kwan Joong Joo

Department of Urology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.

Correspondence to: Kwan Joong Joo. Department of Urology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, 108, Pyeong-dong, Jongno-gu, Seoul 110-746, Korea. TEL: 02-2001-2240, FAX: 02-2001-2247, kj.joo@samsung.com

Received 25 November 2009       Accepted 4 December 2009

Copyright © The Korean Urological Association, 2009

Abstract

Purpose

Potassium-titanyl-phosphate laser photoselective vaporization of the prostate (PVP) is a safe and effective treatment for patients with symptomatic benign prostatic hyperplasia (BPH). The aim of this study was to assess the influence and the effect of PVP in BPH patients with detrusor underactivity.

Materials and Methods

We evaluated 21 patients with detrusor under-activity treated with PVP for BPH from January 2006 to December 2007. Detrusor underactivity was defined as detrusor pressure at maximal flow rate (Qmax) of less than 30 cmH2O and Qmax of less than 15 ml/s. Urodynamic studies were performed and international prostate symptom score (IPSS) and quality of life (QoL) scores were assessed preoperatively and at 6 months postoperatively.

Results

There were significant improvements in Qmax, voiding urine volume, post-void residual urine volume, IPSS, and QoL scores at 6 months after PVP treatment. However, patients did not show significant changes in maximal bladder capacity, bladder compliance, or detrusor pressure at Qmax.

Conclusions

Even though BPH patients had detrusor underactivity, PVP was an effective surgical procedure. However, PVP did not make any significant difference on detrusor pressure at Qmax in 6 months.

Keywords: KTP laser, Prostatic hyperplasia, Urodynamics

Figures and Tables

Fig. 1
Comparisons of clinical parameters (A: Qmax, B: Pdet at Qmax, C: PVR, D: IPSS) at pre- and postoperative. Qmax: maximal flow rate, Pdet at Qmax: detrusor pressure at maximal flow rate, PVR: post void residual, IPSS: International Prostate Symptom Score, a: comparisons of the variables before and after operation.
kju-50-1193-g001
Table 1
Patient characteristics
kju-50-1193-i001

PSA: prostate-specific antigen, IPSS: International Prostate Symptom Score, QoL: quality of life

Table 2
Changes in urodynamic and clinical parameters
kju-50-1193-i002

Qmax: maximal flow rate, Pdet at Qmax: detrusor pressure at maximal flow rate, PVR: post void residual, IPSS: International Prostate Symptom Score, QoL: quality of life

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