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Comparison of Body Weight Distribution, Peak Vertical Force, and Vertical Impulse as Measures of Hip Joint Pain and Efficacy of Total Hip Replacement
Author(s) -
Seibert Rachel,
MarcellinLittle Denis J.,
Roe Simon C.,
DePuy Venita,
Lascelles B. Duncan X.
Publication year - 2012
Publication title -
veterinary surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 79
eISSN - 1532-950X
pISSN - 0161-3499
DOI - 10.1111/j.1532-950x.2012.00957.x
Subject(s) - medicine , body weight , ground reaction force , lower limb , significant difference , analysis of variance , surgery , impulse (physics) , prospective cohort study , statistical significance , anesthesia , physics , kinematics , classical mechanics , quantum mechanics
Objective To determine whether there is a difference between the ability of peak vertical force ( PVF ), vertical impulse ( VI ), and percentage body weight distribution (% BW dist ) in differentiating which leg is most affected by hip joint pain before total hip replacement ( THR ) surgery, and for measuring changes in limb use after THR surgery. Study Design Prospective clinical study. Animals Dogs (n = 47). Methods Ground reaction force ( GRF ) data were collected using a pressure‐sensitive walkway the day before THR surgery and at ∼3, 6, and 12 months postoperatively. PVF and VI expressed as a percentage of body weight (% PVF , % VI ), and % BW dist were recorded. Regression models performed separately for each outcome were used for statistical analysis. Results When comparing limb use between the affected limb ( AP ) and the nonaffected limb ( NP ) preoperatively, differences between limbs were statistically significant when evaluated using PVF ( P = .023), VI ( P = .010), and % BW dist ( P = .012). When evaluating the magnitude of absolute and percentage change difference in AP limb use preoperatively versus postoperatively, differences were statistically significant when evaluated using PVF ( P < .001 and P = .001, respectively), VI ( P = .001 and P < .001) and % BW dist ( P < .001 and P < .001). Conclusion There appeared to be no difference in the sensitivity of VI , PVF , and % BW dist for evaluating limb use before and after THR .