Neodymium YAG (Nd-YAG) laser is a new instrument for the treatment of various urologic disorders where coagulation is necessary but still limited in cases. It avoids many of the side effects of electrocoagulations. Nd.YAG Iaser is a safe and effective modality, reducing blood loss, shortening operation time and preserving functional integrity on remaining renal tissue. In this experiment, to investigate the Nd-YAG Laser effect to renal tissue and the adaptation to renal surgery were aimed. We made the experimental study on renal tissue damage according to the change of irradiation time and power of NJ-YAG laser. The following results were obtained; After irradiation of Nd-YAG laser, renal tissue damage was noted on 30 Watt, 3 seconds and 5O Watt, 1 second, and the degree of renal tissue damage was increased with in creasing of laser power and time. A 2mm depth injured renal tissue was noted on 150-250 Joules, which coagulates the vessel with several mm diameter. Judging from the results of this experiment it may be believed that Nd-YAG laser can be adaptable to renal surgery in bleeding control without severe renal tissue damage.
Hemorrhage ; Lasers, Solid-State ; Neodymium

The study was designed to determine the effectiveness of perineal ultrasonography compared with chain cystourethrography(CUG) in genuine stress urinary incontinence and to evaluate the diagnostic significance of perineal ultrasonography in 30 women with genuine stress urinary incontinence. The distinctive characteristic of perineal ultrasonography is simple, noninvasive, free of radiation exposure, comfortable, and not shameful out-patient procedure. We measured the posterior urethrovesical angle(PLRVA) at rest and during strain, and calculated the difference between the two angles. The mean value of PUVA at resting state were 134.7' in perineal ultrasonography group and 135.5' in chain CUG group(p=0.8235). During strain state, PLRVA was 146.2' in perineal ultrasonography group and 147.4' in chain CUG groupt=0.8341) The difference between PUVAs at rest and during strain was 12.1' in perineal ultrasonography group and 12.0' in chain CUG group(p=0.9022). The percentage of patients' subjective satisfaction with perineal ultrasonography was 96%, however the percentage of discomfort in chain CUG was 96%. In conclusion, perineal ultrasonography is a very comfortable and useful diagnostic method in genuine stress urinary incontinence, to replace chain CUG.
Female ; Humans ; Outpatients ; Shame ; Ultrasonography* ; Urinary Incontinence*