What is known about pregnancy outcomes?
In the last six years, we have evaluated more than 35 pregnancies with Twin Reversed Arterial Perfusion Sequence (TRAP) of which 20 underwent selective bipolar umbilical cord cauterization procedures. We have had a 95 percent survival for the normal pump twin with an average age at delivery between 36 and 37 weeks. No significant neurologic abnormalities have been identified in these children. In addition, we have more recently performed five radiofrequency ablation (RFA) procedures for Twin Reversed Arterial Perfusion Sequence (TRAP) sequence, with one unexpected post-operative pump twin demise, but the remaining four pregnancies are ongoing and undelivered but reported to be doing well. Our colleagues at the University of California-San Francisco have reported a 92 percent survival with an average age of delivery of 38 weeks for 13 cases of TRAP sequence treated with RFA.
