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Journal of Bone and Joint Surgery - British Volume, Vol 91-B, Issue 5, 583-588.
doi: 10.1302/0301-620X.91B5.21477  
Copyright © 2009 by British Editorial Society of Bone and Joint Surgery
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Persisting muscle atrophy two years after replacement of the hip

A. Rasch, MD, Orthopaedic Surgeon1; A. H. Byström, MD, Radiologist2; N. Dalén, MD, PhD, Orthopaedic Surgeon1; N. Martinez-Carranza, MD, Orthopaedic Surgeon3; and H. E. Berg, MD, PhD, Orthopaedic Surgeon3

1 Karolinska Institutet, Division of Orthopaedic Surgery, Department of Clinical Sciences, Danderyd Hospital, SE-182 88, Stockholm, Sweden.
2 Department of Radiology St Görans Hospital, SE-112 51 Stockholm, Sweden.
3 CLINTEC, Department of Orthopaedic Surgery, Karolinska University Hospital Huddinge, SE-141 86, Stockholm, Sweden.

Correspondence should be sent to Dr A. Rasch; e-mail: anton.rasch{at}ds.se

Muscle atrophy has been demonstrated in patients suffering from osteoarthritis of the hip, but little is known about muscular recovery after total hip replacement (THR). A total of 20 patients with unilateral osteoarthritis of the hip were assessed before, six months and two years after THR. The cross-sectional area and radiological density of the muscles of the hip, thigh, calf and back were measured using CT. We hypothesised that the muscles would not recover fully after operation.

After two years comparison of the limb with the THR with the healthy limb showed that there was such a reduction in the cross-sectional area in iliopsoas (7.0%; p = 0.006) and the hip adductors (8.4%, p = 0.003) and in the radiological density in gluteus maximus (10.1 Hounsfield units; p < 0.001), gluteus medius/minimus (5.6 Hounsfield units; p = 0.011), iliopsoas (3.9 Hounsfield units; p < 0.001) and the adductors (2.4 Hounsfield units; p = 0.022).

Thus, there was persistent muscle atrophy in muscles acting about the hip two years after THR. We suggest that an earlier operation or a more intensive rehabilitation may reverse these changes.




eLetters:

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Clinical implications of persisting muscle atrophy two years after replacement of the hip
Sunil Apsingi, et al.
J Bone Joint Surg Br Online, 20 May 2009 [Full text]
Persisting muscle atrophy two years after replacement of the hip
Myron M. LaBan, et al.
J Bone Joint Surg Br Online, 19 Jun 2009 [Full text]

(c) British Editorial Society of Bone and Joint Surgery All Rights Reserved
Registered charity no: 209299     Print ISSN: 0301-620X
Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General