title: A prospective randomised controlled trial of the Kiwi Omnicup versus conventional ventouse cups for vacuum-assisted vaginal delivery.
abstract: OBJECTIVE
  To evaluate the performance and safety of the Kiwi Omnicup and compare it to conventional vacuum cups in routine clinical practice.
  
  
  METHODS
  A randomised controlled trial of the Kiwi Omnicup versus conventional vacuum cups.
  
  
  METHODS
  Queen Charlotte's and Chelsea Hospital, a tertiary referral hospital in London from April 2001 to March 2004.
  
  
  METHODS
  Women requiring assisted vaginal delivery by ventouse.
  
  
  METHODS
  Women were randomised to the Kiwi Omnicup (n=206) or conventional vacuum cups (n=198). Data regarding maternal demographics, labour, mode of delivery and maternal and neonatal outcome were collected.
  
  
  METHODS
  Failure of delivery with instrument of first choice.
  
  
  RESULTS
  The Kiwi Omnicup was less successful at delivery with instrument of first choice than the conventional ventouse, failure rate 30.1 versus 19.2% (RR 1.58; 95% CI 1.10-2.24). It was associated with a greater number of cup detachments (mean 0.68 compared with 0.28, with 44% compared with 18% having at least one detachment [P<0.0001]). There was no difference in the incidence of severe maternal trauma, and there were no cases of serious neonatal injury.
  
  
  CONCLUSIONS
  The Kiwi Omnicup is less successful than conventional ventouse in achieving vaginal delivery, but its safety profile is comparable.
authors.affiliation: Department of Obstetrics and Gynaecology, Queen Charlotte's and Chelsea Hospital, London, UK. katiegroom@xtra.co.nz
authors.forename: K M
authors.initials: KM
authors.lastname: Groom
authors.forename: B A
authors.initials: BA
authors.lastname: Jones
authors.forename: N
authors.initials: N
authors.lastname: Miller
authors.forename: S
authors.initials: S
authors.lastname: Paterson-Brown
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D007744:Obstetric Labor Complications / Q000628:therapy*; D011247:Pregnancy; D011446:Prospective Studies; D016896:Treatment Outcome; D014620:Vacuum Extraction, Obstetrical / Q000295:instrumentation*