title: Vibratory sense deficits in patients with symptomatic femoroacetabular impingement.
abstract: Sensory deficits, measured through vibratory perception threshold (VPT), have been recognized in hip and knee osteoarthritis (OA), but have not been evaluated in femoroacetabular impingement (FAI), thought to be a pre-OA condition. This study aimed to assess VPT in symptomatic FAI pre- and 6-months post-arthroscopy vs.
  
  
  
  FAI patients and controls were assessed for VPT at the first metatarsophalangeal joint. Pain was assessed using a visual analog pain scale. FAI participants were evaluated again 6-months after surgery for FAI. Differences between groups and pre- and post- surgery were evaluated with independent and paired sample t-tests, respectively. Secondary analysis was performed using repeated-measures ANOVA to evaluate the effect of pain and time since surgery on VPT pre- and post-operatively.
  
  
  
  No differences in age and BMI were seen between groups (p>0.05). Reduced VPT (higher value is worse) was evident in the pre- (8.0±3.9V, t=2.81, p=0.009) and post-operative (6.8±2.8V, t=2.34, p=0.027) patients compared to controls (4.7±1.3V). After hip arthroscopy, there was a trend toward improved VPT (t=1.97, p=0.068). Preoperative and 6-months postoperative pain and time since surgery were not found to influence VPT (F-ratio⋝0.00, p⋝0.427).
  
  
  
  Sensory deficits were observed in FAI patients both before and 6-months after hip arthroscopy.
authors.affiliation: Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL, USA.
authors.forename: Gary J
authors.initials: GJ
authors.lastname: Farkas
authors.forename: Najia
authors.initials: N
authors.lastname: Shakoor
authors.forename: Gregory L
authors.initials: GL
authors.lastname: Cvetanovich
authors.forename: Louis F
authors.initials: LF
authors.lastname: Fogg
authors.forename: Alejandro A Espinoza
authors.initials: AAE
authors.lastname: Orías
authors.forename: Shane J
authors.initials: SJ
authors.lastname: Nho
mesh_terms: D000328:Adult; D001182:Arthroscopy; D005260:Female; D057925:Femoracetabular Impingement / Q000150:complications / Q000503:physiopathology*; D006801:Humans; D008297:Male; D010147:Pain Measurement; D055698:Touch Perception / Q000502:physiology*; D014732:Vibration