ASSESSMENT OF IN VIVO MECHANICAL MUSCLE FUNCTION IN PATIENTS WITH OSTEOARTHRITIS (OA) OF THE HIP; RELIABILITY
Publikation: Bidrag til bog/antologi/rapport › Konferenceabstrakt i proceedings › Forskning
INTRODUCTION
Muscle function in patients with hip OA is not well-studied. We established a new setup of tests in order to monitor patients before and after surgery with total hip arthroplasty (THA). A test-retest protocol was designed to evaluate the reproducibility of single- and multi-joint strength and power a novel setup.
MATERIAL AND METHODS
Isokinetic contractions for both knee and hip muscles were performed. Reliability for isometric muscle contractions in vivo was recorded and evaluated by use of within subject variability (CVW-S), Spearman correlation and Limits of Agreement (LoA). Both explosive muscle force characteristics (Rate of force development) and maximal isometric force (MVC) were obtained for the affected (aff) and non-affected (n-aff) leg (only data MVC for affected side in this abstract). 20 patients, (age 55.9 ± 4.8; height 174 ± 8; BMI 27.1 ± 4.5) with unilateral hip OA participated in a test-retest after 8w at 10w post op.
RESULTS
Table 1: Patient test - retest reliability (Maximal Isometric Muscle Torque) for aff-side
AFF-leg | Test (8W) Mean ± SD
| Test (10W) Mean ± SD
| Δmean
| CVws
| Spearman ± SE
| LoA
|
Knee EXT | 1.32 ± 0.38 | 1.41 ± 0.35 | -0.09 ± 0.16 | -6.5 % | 0.88 ± 0.05 | -0.40 : 0.20 |
Knee FLX | 0.63 ± 0.23 | 0.65 ± 0.17 | -0.02 ± 0.10 | -3.8 % | 0.87 ± 0.05 | -0.22 : 0.17 |
Hip ADD | 1.28 ± 0.32 | 1.34 ± 0.37 | -0.07 ± 0.12 | -5.1 % | 0.93 ± 0.03 | -0.29 : 0.16 |
Hip ABD | 1.35 ± 0.28 | 1.47 ± 0.35 | -0.11 ± 0.14 | -8.0 % | 0.84 ± 0.07 | -0.39 : 0.16 |
Hip EXT | 1.86 ± 0.44 | 2.07 ± 0.57 | -0.20 ± 0.24 | -9.9 % | 0.82 ± 0.07 | -0.67 : 0.26 |
Hip FLX | 1.09 ± 0.31 | 1.23 ± 0.33 | -0.15 ± 0.13 | -12.8 % | 0.82 ± 0.06 | -0.40 : 0.11 |
Test-retest showed good CV's for all except hip flexion.
CONCLUSIONS
Our novel setup of muscle tests showed overall good CV's, which is promising for further studies on the patient group.
| Originalsprog | Engelsk |
|---|---|
| Titel | Proceedings Årsmøde 2009 Dansk Ortopædisk Selskab |
| Antal sider | 1 |
| Publikationsdato | 2009 |
| Status | Udgivet - 2009 |
| Eksternt udgivet | Ja |
| Begivenhed | Dansk Ortopædisk Selskab - Odense, Danmark Varighed: 29 apr. 2009 → 1 maj 2009 |
Konference
| Konference | Dansk Ortopædisk Selskab |
|---|---|
| Land | Danmark |
| By | Odense |
| Periode | 29/04/2009 → 01/05/2009 |
ID: 252057439