title: Effect of lower extremity fasciotomy length on intracompartmental pressure in an animal model of compartment syndrome: the importance of achieving a minimum of 90% fascial release.
abstract: BACKGROUND
  There has been an increase in minimally invasive surgery for chronic exertional compartment syndrome (CECS), despite the potential for incomplete compartment release and iatrogenic injuries. To our knowledge, no study has examined the effect of the length of fascial release on compartment pressures.
  
  
  OBJECTIVE
  The purpose was to explain the high failure rate seen in fascial release for CECS by evaluating the effect of fasciotomy length on intracompartmental pressures. We hypothesized that complete fascial release would need to be performed to return pressures to baseline levels.
  
  
  METHODS
  Controlled laboratory study.
  
  
  METHODS
  Five male swine (10 lower extremities) were anesthetized. A slit catheter, connected to a pressure monitor, was inserted into the anterior compartment and a solution containing 5% swine albumin was injected into the compartment until the compartment pressure was >25 mm Hg for 10 minutes. Pressures were measured at rest, after the injection, and after each 10% incremental fasciotomy release.
  
  
  RESULTS
  The mean resting intracompartmental pressure was 3.2 mm Hg (range, 0-6 mm Hg), which increased after the injection to a mean of 37 mm Hg (range, 26-67 mm Hg). After complete fasciotomy, the mean pressure was 1.1 mm Hg (range, 0-4 mm Hg). There was a strong negative correlation (r=-0.693) between fasciotomy length and intracompartmental pressure. In 90% of the specimens, the pressures were <15 mm Hg after 80% fascial release, and after 90% release, all pressures were ≤8 mm Hg.
  
  
  CONCLUSIONS
  This study demonstrates a strong correlation between fasciotomy length and a reduction in intracompartmental pressures in a swine model. Our study suggests that 90% fascial release may represent a possible watershed zone, returning the intracompartmental pressure to a value at or near baseline values.
  
  
  CONCLUSIONS
  The results suggest that even in cases with near complete fascial release, intracompartmental pressures may decrease enough to provide symptomatic relief and avoid possible iatrogenic injuries associated with percutaneous release. It is unknown whether the swine model may adequately translate to the clinical setting; thus, recommendations should be taken with caution, and future studies should be performed to examine the correlation in a human model.
authors.affiliation: Department of Orthopaedic Surgery, University of Illinois at Chicago, Chicago, Illinois, USA.
authors.forename: James E
authors.initials: JE
authors.lastname: Mathis
authors.affiliation: Department of Orthopaedic Surgery, University of Illinois at Chicago, Chicago, Illinois, USA bschwartz7@gmail.com.
authors.forename: Brian E
authors.initials: BE
authors.lastname: Schwartz
authors.affiliation: Department of Orthopaedic Surgery, University of Illinois at Chicago, Chicago, Illinois, USA.
authors.forename: Jonathan D
authors.initials: JD
authors.lastname: Lester
authors.affiliation: Department of Orthopaedic Surgery, University of Illinois at Chicago, Chicago, Illinois, USA.
authors.forename: Walter J
authors.initials: WJ
authors.lastname: Kim
authors.affiliation: Department of Orthopaedic Surgery, University of Illinois at Chicago, Chicago, Illinois, USA.
authors.forename: Jonathan N
authors.initials: JN
authors.lastname: Watson
authors.affiliation: Department of Orthopaedic Surgery, University of Illinois at Chicago, Chicago, Illinois, USA.
authors.forename: Mark R
authors.initials: MR
authors.lastname: Hutchinson
mesh_terms: D000818:Animals; D003161:Compartment Syndromes / Q000601:surgery*; D019299:Decompression, Surgical / Q000379:methods*; D004195:Disease Models, Animal; D000071938:Fasciotomy; D035002:Lower Extremity / Q000601:surgery; D008297:Male; D005082:Physical Exertion; D011312:Pressure; D013552:Swine
keywords: CECS; chronic exertional compartment syndrome; fasciotomy