The one year outcome after KTP laser vaporization of the prostate according to the calculated vaporized volume.
The aim of this study was to develop a new simple method for measuring the vaporized volume and to evaluate the outcome of high-power potassium-titanyl-phosphate (KTP) photoselective laser vaporization. A total of 65 patients, with a mean age of 67.7 yr (range 53 to 85), were included in the primary analysis. The vaporized volume was calculated as the pre-operative volume minus the immediate post-operative volume plus the volume of the defect. For all patients, the subjective and objective parameters improved significantly after surgery. Six and 12 months after surgery, the group with a smaller vaporized volume (<15 g) had a lower reduction of the mean International Prostate Symptom Score (P=0.006 and P=0.004) and quality of life index (P=0.006 and P=0.004) when compared to the group with a greater vaporized volume (>or=15 g). There were no differences in the change of the maximum flow rate and post-void residual based on the vaporized volume. Our findings suggest that the subjective improvement, after a high-power KTP laser vaporization, may be dependent on the vaporized volume obtained after the procedure.
Ku
Ja Hyeon
JH
Department of Urology, Seoul National University Hospital, Seoul, Korea.
Cho
Jeong Yeon
JY
Cho
Sung Yong
SY
Kim
Soo Woong
SW
Paick
Jae-Seung
JS
D000368:Aged; D000369:Aged, 80 and over; D006801:Humans; D053685:Laser Therapy / Q000379:methods*; D053844:Lasers, Solid-State / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D017060:Patient Satisfaction; D011467:Prostate / Q000473:pathology / Q000601:surgery*; D011788:Quality of Life; D020728:Transurethral Resection of Prostate / Q000379:methods*; D016896:Treatment Outcome; D014835:Volatilization