Guy’s stone Scoring in Predicting Post operative Residual Stones

Abstract

Objective: To determine the frequency of postoperative residual stone based on preprocedural Guy’s scoring system.Methodology: This cross-sectional descriptive study was conducted from1st June 2018 to 30th November 2019 at University Medical College Faisalabad. All patients with stones in the kidney undergoing PCNL, 20 to 60 years of age of both genders were included. Patients with secondary stones due to pelviureteric junction obstruction, CRF and recurrent stones were excluded. In all patients Guy’s scoring was measured. Then all patients underwent PCNL. After 24 hours of operation, CT scan was done in each patient and residual stone (present/absent) was noted.Results: This study was comprised of 91 patients of age ranged from 20- 60 years. Fifty-three patients (58.24%) were males and 38 (41.76%) females. Seven (7.69%) were of Guy’s grade I, 48(52.75%) grade II, 21(23.08%) grade III and 15 of grade IV. Number of patients with residual stone was 09 (9.89%), 0.0% of GS 1, 12.5% of GS 2, 4.76% of GS 3 and 13.33% of GS 4 patients had residual stone.Conclusion: Pre-PCNL Guy’s scoring is easy, rapid and useful for predicting the residual stone after percutaneous nephrolithotomy. Keywords: Percutaneous nephrolithotomy, Guy’s scoring system, residual stone.