title: A survey of recommendations by gynecologists in Canada regarding oral contraceptive use in the perioperative period.
abstract: OBJECTIVE
  This survey was conducted to determine the practice patterns of gynecologists in Canada regarding the discontinuation of oral contraceptives before gynecologic surgical procedures.
  
  
  METHODS
  In May and June of 1997, surveys were sent to all obstetricians and gynecologists on the mailing list of the Society of Obstetricians and Gynaecologists of Canada.
  
  
  RESULTS
  Of the 1472 surveys that were sent, 702 of the surveys were completed and returned, for a response rate of 48%. More than 90% of the gynecologists who were surveyed would advise their patients to continue using oral contraceptives before relatively minor surgical procedures and <1% of them would use low-dose heparin before these procedures. Rates of oral contraceptive discontinuation increased as the extent of the surgical intervention increased: Prolonged laparoscopy (39.8%), vaginal repairs and hysterectomy (54.7%), and abdominal hysterectomy or adnexectomy (56.1%). Just over one half of the gynecologists (56.1%) indicated that they would advise discontinuation > or =4 weeks before the surgical procedure, which is the minimum time required for the prothrombotic changes that are associated with oral contraceptive use to return to baseline. Less than 10% of the surgeons indicated that they would use low-dose heparin even when the patient was advised to continue taking oral contraceptives before major surgical procedures.
  
  
  CONCLUSIONS
  The controversy over whether young healthy women should discontinue oral contraceptive use before major surgical procedures that are associated with immobility is reflected by a lack of consensus among gynecologists in Canada.
authors.affiliation: Division of Reproductive Endocrinology, Department of Obstetrics and Gynaecology, Queen's University, Kingston, Ontario, Canada.
authors.forename: Jennifer
authors.initials: J
authors.lastname: Oakes
authors.forename: Philip M
authors.initials: PM
authors.lastname: Hahn
authors.forename: David
authors.initials: D
authors.lastname: Lillicrap
authors.forename: Robert L
authors.initials: RL
authors.lastname: Reid
mesh_terms: D002170:Canada; D032921:Consensus; D003276:Contraceptives, Oral / Q000008:administration & dosage*; D005260:Female; D013509:Gynecologic Surgical Procedures / Q000009:adverse effects / Q000379:methods*; D006176:Gynecology; D006493:Heparin / Q000008:administration & dosage; D006801:Humans; D009774:Obstetrics; D011183:Postoperative Complications / Q000517:prevention & control; D010818:Practice Patterns, Physicians'; D011795:Surveys and Questionnaires; D013923:Thromboembolism / Q000517:prevention & control*
chemical_list: D003276:Contraceptives, Oral; D006493:Heparin