title: Volume analysis of arthroscopic capsular shift.
abstract: OBJECTIVE
  To determine how much volume reduction can be obtained with varying amounts of arthroscopic capsular plication.
  
  
  METHODS
  Six fresh-frozen, cadaveric specimens were used. Specimens were rejected if a rotator cuff tear was present. The volume of each shoulder joint was measured under 3 conditions: no capsular shift, 5-mm capsular shift, and 10-mm capsular shift. For each shift, 4 sutures were placed arthroscopically, 2 anteriorly and 2 posteriorly. Repeated measures were used to confirm the validity of the measurements. Data were analyzed with parametric and nonparametric tests.
  
  
  RESULTS
  The average percentage of volume reduction at 5 mm of capsular plication from control was 16.2% (range, 9.7% to 21.5%). The percentage of volume reduction from control to 10 mm of capsular plication averaged 33.7% (range, 25.3% to 44.6%). Statistical significance was found with both parametric (P < .0001) and nonparametric tests (P < .0313).
  
  
  CONCLUSIONS
  The current study found that capsular volume reduction was related to the amount of capsular plication with reproducible results. Capsular plication can produce volume reduction comparable to other techniques.
  
  
  CONCLUSIONS
  The data could be used to determine the potential number of sutures and amount of tissue plication needed for the amount of laxity found at surgery.
authors.affiliation: Division of Sports Medicine, Department of Orthopedics and Rehabilitation, the University of Wisconsin Hospital and Clinics, Madison, Wisconsin 53792, USA.
authors.forename: David C
authors.initials: DC
authors.lastname: Flanigan
authors.forename: Todd
authors.initials: T
authors.lastname: Forsythe
authors.forename: John
authors.initials: J
authors.lastname: Orwin
authors.forename: Lee
authors.initials: L
authors.lastname: Kaplan
mesh_terms: D000886:Anthropometry; D001182:Arthroscopy; D006801:Humans; D066298:In Vitro Techniques; D017746:Joint Capsule / Q000473:pathology / Q000601:surgery*; D007593:Joint Instability / Q000473:pathology / Q000601:surgery; D012785:Shoulder Joint / Q000473:pathology / Q000601:surgery*