title: Intrafetal radiofrequency ablation for twin reversed arterial perfusion (TRAP): a single-center experience.
abstract: OBJECTIVE
  The objective of the study was to review perinatal outcomes in pregnancies treated with intrafetal radiofrequency ablation (RFA) for twin reversed arterial perfusion (TRAP) sequence.
  
  
  METHODS
  Perinatal outcome data from a quaternary care referral center were abstracted from a chart review of pregnancies with TRAP sequence treated in the midtrimester with umbilical cord RFA of the perfused twin.
  
  
  RESULTS
  Twenty-one pregnancies with TRAP sequence were evaluated. Two women had a pump twin demise prior to therapy, 1 with trisomy 21 declined treatment. Four of 20 were treated successfully with RFA but remain undelivered, and 1 was treated with fetoscopic cord coagulation. Twelve of 13 pump twins treated with RFA (94%) survived to 30 days of life. Mean preoperative cardiac combined cardiac output was 588 mL/kg and pump/twin ratio was 0.7 (range 0.4 to 1.1). The effect of RFA on postoperative cardiac output was variable (6-85%). The average gestational age at birth was 37 weeks (range 26-39 weeks).
  
  
  CONCLUSIONS
  Primary therapy with RFA is a successful modality for pregnancies complicated by TRAP sequence.
authors: Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of Cincinnati, Cincinnati, OH 45267-0526, USA. livingjc@ucmail.uc.edu
authors: Jeffrey C
authors: JC
authors: Livingston
authors: Foong-Yen
authors: FY
authors: Lim
authors: William
authors: W
authors: Polzin
authors: Jennifer
authors: J
authors: Mason
authors: Timothy M
authors: TM
authors: Crombleholme
mesh_terms: D002302:Cardiac Output / Q000502:physiology; D017115:Catheter Ablation / Q000379:methods*; D004200:Diseases in Twins / Q000601:surgery*; D005260:Female; D005330:Fetofetal Transfusion / Q000601:surgery*; D006801:Humans; D007231:Infant, Newborn; D011247:Pregnancy; D014427:Twins