title: Complications associated with the periacetabular osteotomy: a prospective multicenter study.
abstract: BACKGROUND
  The purpose of this prospective multicenter study was to determine and categorize all complications associated with the periacetabular osteotomy performed by experienced surgeons.
  
  
  METHODS
  We prospectively analyzed perioperative complications in 205 consecutive unilateral periacetabular osteotomies performed at seven institutions by ten surgeons. All perioperative complications were recorded at an average of ten weeks and one year after surgery in standardized fashion using a validated complication grading scheme applied to hip preservation procedures. The mean patient age was 25.4 years. There were 143 female and sixty-two male patients. The most common diagnosis was developmental acetabular dysplasia, and concomitant procedures most commonly included femoral osteochondroplasty (58%) or hip arthroscopy (20%), which could include labral repair or resection.
  
  
  RESULTS
  Major complications (grade III or IV) occurred in twelve patients (5.9%). Seven complications were evident at the ten-week visit and five at the one-year visit. Nine of the complications required a second surgical intervention, including repair for acetabular migration or implant adjustment (four patients), incision and drainage for a deep infection (two patients), and heterotopic bone resection, contralateral peroneal nerve decompression, and posterior column fixation (one patient each). Three thromboembolic complications were managed medically. There were no vascular injuries, permanent nerve palsies, intra-articular osteotomies and/or fractures, or acetabular osteonecrosis. The most common grade-I or II complication was asymptomatic heterotopic ossification.
  
  
  CONCLUSIONS
  For surgeons experienced with the periacetabular osteotomy, it is a safe procedure but is associated with a 5.9% risk of grade-III or IV complications beyond the learning curve. The majority of these complications are resolved without permanent disability.
  
  
  METHODS
  Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.
authors.affiliation: William Beaumont Hospital - Royal Oak, 30575 Woodward Avenue, Suite 100, Royal Oak, MI 48073.
authors.forename: Ira
authors.initials: I
authors.lastname: Zaltz
authors.affiliation: Department of Orthopaedic Surgery, Washington University School of Medicine, One Barnes-Jewish Plaza, Suite 11300, West Pavilion, Campus Box 8233, St. Louis, MO 63110. E-mail address for J.C. Clohisy: clohisyj@wudosis.wustl.edu.
authors.forename: Geneva
authors.initials: G
authors.lastname: Baca
authors.affiliation: Department of Orthopaedic Surgery, Boston Children's Hospital, Hunnewell-2, 300 Longwood Avenue, Boston, MA 02115.
authors.forename: Young-Jo
authors.initials: YJ
authors.lastname: Kim
authors.affiliation: Shriner's Hospital, Medical Staff Office, 2001 South Lindberg Boulevard, St. Louis, MO 63131.
authors.forename: Perry
authors.initials: P
authors.lastname: Schoenecker
authors.affiliation: Mayo Clinic, 200 1st Street SW E14B, Rochester, MN 55905.
authors.forename: Robert
authors.initials: R
authors.lastname: Trousdale
authors.affiliation: Mayo Clinic, 200 1st Street SW E14B, Rochester, MN 55905.
authors.forename: Rafael
authors.initials: R
authors.lastname: Sierra
authors.affiliation: Texas Scottish Rite Hospital, 2222 Welborn Street, Dallas, TX 75219.
authors.forename: Daniel
authors.initials: D
authors.lastname: Sucato
authors.affiliation: Hospital for Special Surgery, 535 East 70th Street, New York, NY 10021.
authors.forename: Ernie
authors.initials: E
authors.lastname: Sink
authors.affiliation: Ottawa General Hospital, 501 Smyth Road, Suite 5004, Ottawa, ON K1H 8L6, Canada.
authors.forename: Paul
authors.initials: P
authors.lastname: Beaulé
authors.affiliation: Department of Orthopaedic Surgery, Boston Children's Hospital, Hunnewell-2, 300 Longwood Avenue, Boston, MA 02115.
authors.forename: Michael B
authors.initials: MB
authors.lastname: Millis
authors.affiliation: Texas Scottish Rite Hospital, 2222 Welborn Street, Dallas, TX 75219.
authors.forename: David
authors.initials: D
authors.lastname: Podeszwa
authors.affiliation: Department of Orthopaedic Surgery, Washington University School of Medicine, One Barnes-Jewish Plaza, Suite 11300, West Pavilion, Campus Box 8233, St. Louis, MO 63110. E-mail address for J.C. Clohisy: clohisyj@wudosis.wustl.edu.
authors.forename: John C
authors.initials: JC
authors.lastname: Clohisy
mesh_terms: D000077:Acetabulum / Q000601:surgery*; D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D057925:Femoracetabular Impingement / Q000601:surgery*; D005500:Follow-Up Studies; D006617:Hip Dislocation / Q000601:surgery*; D006618:Hip Dislocation, Congenital / Q000601:surgery*; D006801:Humans; D015994:Incidence; D016014:Linear Models; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D010027:Osteotomy / Q000379:methods*; D011183:Postoperative Complications / Q000175:diagnosis / Q000453:epidemiology / Q000628:therapy; D011446:Prospective Studies; D012720:Severity of Illness Index; D016896:Treatment Outcome; D055815:Young Adult