EMS through ureteroseope per urethra for the treatment of infant bladder and urethral stone with acute urinary retention / 中华泌尿外科杂志

ABSTRACT

Objective To evaluate the effect of EMS through ureteroscope per urethra for the treatment of infant bladder and urethral stone with acute urinary retention. Methods Ten cases (9 boys, 1 girl)of infant bladder and urethral stone with acute urinary retention were treated by EMS through ureteroscope per urethra. Mean age of the patients was 9 months. Two cases suffered from bladder stones while the other 8 cases suffered from urethral stones. The size of stones varied from 0.5-1.1 cm with the average of 0.8 cm. All 10 cases underwent EMS through ureteroseope per ure-thra after general anaesthesia by using ketamine in vein. Wolf F8/9. 8 ureteroscope was used and mo-nitored by television. The EMS probe of ultrasound lithotripsy was sticked through operating passway of ureteroscope to shatter and eliminate bladder and urethral stone. During operation, 50-- 100 ml li-quid pressure was retained in the urinary bladder. The pressure of perfusion pump varied between 160 and 210 kPa(average, 180 kPa). The energy of ultrasound lithotripsy was 40%--60% with a ratio of 30%--70%. F8 type of 2 cavity aerocyst urethral catheter was indwelled after operation. Results The average operation time was 25 min. Urethral stones were rinsed into bladder. Stones were elimi-nated at one time by ureteroscope. Urethral catheters were removed after the patients revived from anesthesia and smooth urination was seen immediately after operation. No retained calculus in the bladder and urethra was found by B ultrasound 3 days later. Conclusions Low urinary obstruction could be relieved immediately after EMS through ureteroscope per urethra in patients of infant bladder and urethral stone with acute urinary retention. This operation is safe, high-efficient with less lesion, and would be the first option for the patients of infant bladder and urethral stone with acute urinary re-tention.