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Acta Radiol. 2006 Apr;47(3):281-6.

Indications of inflammation visualized by ultrasound in osteoarthritis of the knee.

Author information

1
The Parker Institute, Copenhagen University Hospital H:S Frederiksberg Hospital, Copenhagen, Denmark.

Abstract

PURPOSE:

Ultrasound examination of a group of patients with osteoarthritis (OA) of the knee for signs of inflammation.

MATERIAL AND METHODS:

71 knees in 71 patients with osteoarthritis of the knee were examined with high-resolution gray-scale ultrasound combined with color and spectral Doppler. The medial, lateral, and antero-superior compartments were examined. Hyperemia was identified as presence of color Doppler signals in the synovial membrane. Low resistance flow was defined as a resistive index < 0.80 on spectral Doppler.

RESULTS:

Synovial thickening was found in all knees; fluid in 61 patients; and hyperemia (color Doppler activity) in 51 patients. Of these, 44 had arterial flow on spectral Doppler - 36 with a low resistance flow. When present, fluid and color Doppler activity was found in all three compartments, but with uneven distribution.

CONCLUSION:

The finding in the majority of cases of both effusions on B-mode US and Doppler activity confirms that there is a varying degree of inflammation in knee OA as diagnosed by the ACR criteria.

PMID:
16613309
[Indexed for MEDLINE]

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