Abstract
To evaluate outcomes of complicated monochorionic pregnancies intervened by radiofrequency
ablation (RFA) and report the initial experience. It is a retrospective case series
of 15 cases of complicated monochorionic twin pregnancies intervened by RFA in Mediscan
Systems Chennai, a tertiary referral Fetal Medicine center, from February 2015 till
February 2017. Perinatal outcomes were available for all 15 cases. Main indication
for RFA was sIUGR in 10 cases, of which 2 had coexistent Twin to Twin Transfusion
syndrome. The procedure was technically successful in all cases. Median gestational
age at procedure was 22.6 weeks (IQR 21, 25.6). The median number of RFA cycles to
attain cardiac asystole was 4 (IQR 3, 7). Four of the fifteen cases (27%) had procedure
related complications of which 3 occured within 2 weeks of procedure. There were 2
cases of preterm premature rupture of membranes which occurred within 2 weeks of procedure.
One case had a miscarriage within 2 weeks of procedure at 21 weeks, another one had
a mid-trimester loss 4 weeks after the procedure at 26 weeks. The median gestational
age at delivery was 35 weeks (IQR 29.3, 35.5). Seventy-eight percent of the live borns
were delivered after 34 weeks. The median procedure delivery interval was 10.4 weeks
(IQR 4.1, 13.6). Median birth weight at delivery was 2000 g (IQR 1300, 2600). The
present series had a live birth rate of 87%. In this initial small series, there was
a good outcome in terms of live birth rates and take home baby rates. The efficacy
needs to be ascertained by larger series and long term neurological outcome.
Keywords
Monochorionic twin pregnancies - Selective fetal reduction - Radiofrequency ablation
