STUDY ON THE ROLE OF VENTILATION-PERFUSION SCAN IN DETECTION OF SILENT PULMONARY EMBOLISM IN NEPHROTIC SYNDROME CHILDREN
INTRODUCTION: Clinically silent pulmonary thromboembolism is commoner than symptomatic one in children with nephrotic syndrome. The present study was done to look for the occurrence of asymptomatic pulmonary thromboembolism in children with nephrotic syndrome using V IQ scan, which is noninvasive, cost effective. MATERIALS AND METHODS: This prospective study conducted at a tertiary care centre over a period of one year on one hundred children with nephrotic syndrome between the ages of 5 and 15 years with a median age of 8 years attending the Pediatric Nephrology Clinic were taken up for the study. Patients showing defect in Tc99m-MAA perfusion scintigraphy underwent ventilation scan within 24-48 hours. Scan ndings were interpreted by two nuclear medicine physicians independently who were unaware of illness of the patients. The results were interpreted according to Modied Prospective Investigation of Pulmonary Embolism Diagnosis (PIOPED) criteria. The overall incidence of abnormal V/Q RESULTS: scan in our study was 14%. Individually the incidence was 13.9% in group I, 22.22% in group II and 3.6% in group III, which indicates that patients with steroid resistant and steroid sensitive nephrotic syndrome in relapse were prone to develop thromboembolic complications more than those who were in remission. Combined scintigraphic evidence of pulmonary thromboembolism was 18.05% in Groups I and II compared to 3.6% in controls (Group III). Patients with abnormal ventilation-perfusion scan showed s CONCLUSION: ignicantly larger (p<0.05) duration of illness (mean 69.7±55.3 months) and signicantly greater degree (p<0.001) of proteinuria as compared to patients with normal ventilation-perfusion scan who had mean duration of illness of 45.5±38.0 months.