title: Bipolar radiofrequency endometrial ablation compared with hydrothermablation for dysfunctional uterine bleeding: a randomized controlled trial.
abstract: OBJECTIVE
  To compare the effectiveness of two second-generation ablation techniques, bipolar radiofrequency impedance-controlled endometrial ablation and hydrothermablation, in the treatment of menorrhagia.
  
  
  METHODS
  This study was a double-blind, randomized controlled trial, which took place in a large teaching hospital in The Netherlands with 500 beds. Women with menorrhagia were randomly allocated to bipolar radiofrequency ablation (bipolar group) and hydrothermablation (hydrotherm group). At follow-up, both women and observers remained unaware of the type of treatment that had been performed. The primary outcome was amenorrhea. Secondary outcome measures were patient satisfaction and reintervention.
  
  
  RESULTS
  We included 160 women in the study, of which 82 were allocated to the bipolar group and 78 to the hydrotherm group. No complications occurred in either of the treatment groups. After 12 months, 87% (65 of 75) of the patients in the bipolar group were completely satisfied with the result of the treatment compared with 68% (48 of 71) in the hydrotherm group (relative risk 1.3, 95% confidence interval [CI] 1.03-1.6). The amenorrhea rates were 47% (35 of 75) in the bipolar group and 24% (17 of 71) in the hydrotherm group (relative risk 2.0, 95% CI 1.2-3.1). The relative risks for a reintervention in the bipolar group compared with the hydrotherm group was 0.29 (95% CI 0.12-0.67), whereas for hysterectomy, this was 0.49 (95% CI 0.15-1.5).
  
  
  CONCLUSIONS
  In the treatment of menorrhagia, bipolar radiofrequency endometrial ablation system is superior to hydrothermablation.
  
  
  BACKGROUND
  ISRCTN Register, www.isrctn.org, ISRCTN23845359.
  
  
  METHODS
  I.
authors.affiliation: From the Department of Obstetrics and Gynecology, Máxima Medical Centre, Veldhoven, The Netherlands; the Department of Obstetrics and Gynecology, AMC Amsterdam, Amsterdam, The Netherlands; and the Department of Obstetrics & Gynecology and GROW-School for Oncology and Developmental Biology, Maastricht University Medical Centre, Maastricht, The Netherlands.
authors.forename: Josien P M
authors.initials: JPM
authors.lastname: Penninx
authors.forename: Ben
authors.initials: B
authors.lastname: Willem Mol
authors.forename: Ruben
authors.initials: R
authors.lastname: Engels
authors.forename: Minouche M E
authors.initials: MME
authors.lastname: van Rumste
authors.forename: Channa
authors.initials: C
authors.lastname: Kleijn
authors.forename: Carolien A M
authors.initials: CAM
authors.lastname: Koks
authors.forename: Roy F P M
authors.initials: RFPM
authors.lastname: Kruitwagen
authors.forename: Marlies Y
authors.initials: MY
authors.lastname: Bongers
mesh_terms: D000328:Adult; D017115:Catheter Ablation / Q000379:methods*; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D007044:Hysterectomy; D015907:Hysteroscopy; D057194:Intention to Treat Analysis; D008595:Menorrhagia / Q000601:surgery*; D008796:Metrorrhagia / Q000601:surgery*; D008875:Middle Aged; D017060:Patient Satisfaction; D012965:Sodium Chloride; D016896:Treatment Outcome; D014463:Ultrasonography; D014599:Uterus / Q000000981:diagnostic imaging
chemical_list: D012965:Sodium Chloride