Stone-free-rate after extracorporeal shockwave lithotripsy in the management of pediatric renal stones in lower pole and other locations - a comparative study

Objective: To determine a difference in the stone-free-rate among different renal locations in children after extracorporeal shockwave lithotripsy [ESWL]

---

Study Design: A descriptive study

---

Place and Duration of Study: Urology Department, Shifa International Hospital, Islamabad, Pakistan, from January 2007 to June 2015

---

Methodology: The study included children who underwent ESWL, divided into three groups based on location of stones in kidney as group A [lower pole stones], group B [upper and mid pole stones] and group C [renal pelvis stone], respectively. ESWL was done by standard technique using Storz Modulith SLX lithotripter 3rd generation. Data was collected by chart review. SPSS version 16 was used for data analysis

---

Results: Among 76 children with mean age of 7.55 +/- 4.16 years, 55 [72.4%] were males whereas 21 [27.6%] were females. Mean stone size was 1.08 +/- 0.59 cm. There were 34, 17 and 25 cases in groups A, B and C, respectively. Post-ESWL stone-free-rate was 47% in lower pole stones, 70.58% in upper and mid pole stones, and 68% in renal pelvis stones. Hematuria was seen in one patient from each group, sepsis in two patients from each of the mid pole/upper pole and lower pole group, while Steinstrasse in one patient from each group

---

Conclusion: ESWL is a safe and effective way of treating renal stones in all poles in pediatric population