PURPOSE: To compare the slow versus the fast shock waves frequency rates in disintegration of pediatric renal stones less than 20mm.
MATERIAL AND METHODS: Our study included sixty children with solitary radio opaque renal stone 10-20 mm in size treated by SWL; they were prospectively randomized into two groups. Group I included 30 patients subjected to 80 SW/min rate and Group II included 30 patients subjected to 120 SW/min rate. The two groups were compared in terms of treatment success, anesthesia time, secondary procedures, and efficiency quotient (EQ).
RESULTS: Stone clearance rate was significantly more in group I (90%) than group II (73.3%) (P= 0.025). In group I, 18 patients (60%) rendered stone free after one session, 8 patients needed 2 sessions, and only one patient needed 3 sessions while three patients failed SWL. In group II, 8 patients (26.6%), 10 patients (33.3%), and 4 patients (13.3%) needed one, two, and three sessions respectively to be stone free. The general anesthesia mean time was significantly longer in group I (P= 0.041). Postoperatively, six patients suffered from low grade fever (Clavien II ); two in group I and four in group II. The secondary procedures (PCNL or repeat SWL) were significantly more in group II (P= 0.005). The predominant stone analysis was ca oxalate dihydrate in either group. EQ was 0.5869 and 0.3437 for group I and group II respectively (P=0.0247).
CONCLUSION: In pediatric renal stones, slow delivery rates of SWL have better results on stone clearance than fast delivery rates.
Written by:
Salem HK, Fathy H, El Fayoumy H, Ali H, Ghonium A, Mohseen MA, Hegazy AE. Are you the author?
Urology Department, Faculty of Medicine, Cairo University.
Reference: J Urol. 2013 Nov 18. pii: S0022-5347(13)05981-8.
doi: 10.1016/j.juro.2013.11.028
PubMed Abstract
PMID: 24262496
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