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  • Title: Short-Term Outcomes of Treatment of Boys with Posterior Urethral Valves.
    Author: Nasir AA, Oyinloye AO, Abdur-Rahman LO, Bamigbola KT, Abdulraheem NT, Adedoyin OT, Adeniran JO.
    Journal: Niger Med J; 2019; 60(6):306-311. PubMed ID: 32180661.
    Abstract:
    BACKGROUND: Posterior urethral valve (PUV) is a significant cause of morbidity and mortality among male children resulting in renal failure in 25%-30% before adolescence irrespective of initial treatment. This study aimed at evaluating the early outcomes of children managed for PUV. MATERIALS AND METHODS: This was a prospective study of all children who were treated for PUV between 2012 and 2016 at a single referral institution. Information reviewed included demographic and clinical data, imaging findings, pre- and post-operative serum electrolytes, and postoperative renal outcomes. RESULTS: Twenty-nine male children were managed for PUV at a median age of 6 months including 7 (24.1%) neonates. Two (6.9%) patients had antenatal diagnosis. Micturating cystourethrogram confirmed PUV in all patients. Fourteen (48.3%) patients had impaired renal function (IRF) at presentation and 8 (57%) had improved renal function (RF) after initial catheter drainage. The mean creatinine at presentation was 1.86 ± 1.69 mg/dl and the mean serum creatinine following initial catheter drainage was 0. 93 ± 0.49 mg/dl (P = 0.003). For those patients with normal RF, the mean creatinine at presentation was 0.81 ± 0.22 mg/dl versus 0.74 ± 0.21 mg/dl (P = 0.012), following initial catheter drainage. Children with IRF on admission had mean creatinine at presentation of 2.61 ± 2.00 mg/dl compared to 1.17 ± 0.53 mg/dl (P = 0.002) after initial catheter drainage. Valve ablation was achieved with Mohan's valvotome in 26 (96.3%) patients. All patients had good urine stream at a median follow-up of 5 months. Four (13.8%) patients developed IRF at follow-up. Renal outcomes of patients presenting before 1 year and those presenting after 1 year were similar. Two children died preoperative of urosepsis and one out of hospital death given an overall mortality of 10.3% (n = 3). CONCLUSION: There was significant improvement in RF after initial catheter drainage. The incidence of IRF at follow-up was 13.8%. Long-term follow-up is necessary to identify patients at risk of end-stage renal disease.
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