Right ventricular outflow tract obstruction in twin-to-twin transfusion syndrome undergoing laser surgery: A systematic review and meta-analysis.

INTRODUCTION: We aimed to investigate the incidence, prenatal factors and outcomes of twin-to-twin transfusion (TTTS) with right ventricular outflow tract obstruction (RVOTO). MATERIAL AND METHODS: A systematic search was conducted to identify relevant studies published until February 2023 in English using the databases PubMed, Scopus and Web of Science. Studies reporting on pregnancies with TTTS and RVOTO were included. The random-effect model pooled the mean differences or odds ratios (OR) and the corresponding 95% confidence intervals. Heterogeneity was assessed using the I2 value. RESULTS: A total of 17 studies encompassing 4332 TTTS pregnancies, of which 225 cases had RVOTO, were included. Incidence of RVOTO at time of TTTS diagnosis was 6%. In all, 134/197 (68%) had functional pulmonary stenosis and 62/197 (32%) had functional pulmonary atresia. Of these, 27% resolved following laser and 55% persisted after birth. Of those persisting, 27% required cardiac valve procedures. Prenatal associations were TTTS stage III (53% vs 39% in no-RVOTO), stage IV TTTS (28% in RVOTO vs 12% in no-RVOTO) and ductus venosus reversed a-wave (60% in RVOTO vs 19% in no-RVOTO). Gestational age at laser and gestational age at delivery were comparable between groups. Survival outcomes were also comparable between groups, including fetal demise of 26%, neonatal death of 12% and 6-month survival of 82% in RVOTO group. Findings were similar when subgroup analysis was done for studies including head-to-head analysis. CONCLUSIONS: RVOT occurs in about 6% of the recipient twins with TTTS, especially in stages III and IV and those with reversed ductus venosus a-wave. The findings from this systematic review support the need for a thorough cardiac assessment of pregnancies complicated by TTTS, both before and after laser, to maximize perinatal outcome, and the importance of early diagnosis of TTTS and timely management.

Awareness of quantity of ORS and Zinc among mothers of under five children with diarrhoea at a tertiary care Centre Lahore.

OBJECTIVE: To assess mothers' knowledge about the quantity of oral rehydration salt and zinc in the management of diarrhoea. METHODS: The cross-sectional study was conducted from May to August 2019 at The Children's Hospital, Lahore, Pakistan, and comprised mothers accompanying children aged <5 years admitted with diarrhoea complaints. Data was collected regarding demographics and mothers' awareness of signs of dehydration in diarrhoea, familiarity with the term oral rehydration salt, its correct preparation and administration and zinc supplementation. Data was analysed using SPSS 20. RESULTS: Of the 334 mothers interviewed, 154(46%) were able to identify the signs of dehydration. Maternal awareness regarding use of oral rehydration salt and zinc in diarrhoea were significantly associated with maternal education and socioeconomic status (p<0.05). CONCLUSIONS: There is a need to generate awareness among mothers about the use of oral rehydration salt and zinc in diarrhoea.