Follow up of S3 cases of urinary calculi caused by melamine-contaminated infant milk powder

Abstract

Objective To analyze the clinical features and prognosis of urinary calculi in children caused by melamine-contaminated milk. Methods Retrospective analysis of 53 cases of urinary calculi caused by melamine contaminated infant milk powder were performed. Clinical characteristics, lab measurements, colour Doppler ultrasound and CT examination results were collected, and the outcome of treatment and prognosis were followed up. Results In the 53 cases, there were 39 males and 14 females. The main clinical manifestations at admission included crying during urination, abdominal pain, hematuria, oliguria and anuria. Urine pH value was low with average of 5. 32 ±0. 25,blood uric acid was high with average of (638. 69 ±36. 25) μmol/L,blood urea nitrogen was high with average of (8. 35 ± 1. 97) mmol/L The colour Doppler ultrasound and CT examination showed calculi in both or one side kidney,or combined with calculi in both or one side ureter,calculi in one side ureter,or bladder calculi. After medical treatment,all calculi were exported,urine pH values increased to 6. 52 ±0. 47,blood uric acid blood and urea nitrogen decreased to (382. 31 ±29. 57) μmo/L and (5. 15 ±1.92) mmol/L No calculi reoccurred within one year of follow up. Conclusions Medical treatment of urinary calculi in children caused by melamine-contaminated milk powder was effective,and there were less stone recurrence after discharge. Key words: Melamine; Infant and child; Urinary stones; Prognosis