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Eur J Vasc Endovasc Surg. 2013 Oct;46(4):466-72. doi: 10.1016/j.ejvs.2013.07.003. Epub 2013 Aug 3.

Doppler ultrasound examination of multiple sclerosis patients and control participants: inter-observer agreement and association with disease.

Author information

1
Department of Vascular Surgery, Helsinki University Central Hospital, Helsinki, Finland. Electronic address: sani.laukontaus@hus.fi.

Abstract

OBJECTIVE:

Chronic cerebrospinal venous insufficiency (CCSVI) has been proposed as a major risk factor for multiple sclerosis (MS). The aim of this study was to assess inter-observer agreement between two ultrasound examiners and to compare findings in MS patients and control participants.

METHODS:

A prospective, blinded, controlled study of MS patients diagnosed within 2 years (MS ≤ 2, n = 39), patients diagnosed more than 10 years ago (MS > 10, n = 43) and age- and sex-matched control participants (n = 40). Ultrasound examinations were performed by two independent examiners. CCSVI criteria 1, 3, 4 and 5 as proposed by Zamboni were explored: (1) reflux in the internal jugular (IJV) and vertebral veins (VV), (3) IJV cross-sectional area (CSA) ≤0.3 cm(2), (4) absence of flow in IJV and VV, and (5) reverted postural control of venous outflow.

RESULTS:

Criteria 1, 4 and 5 were met in less than 10% of the MS patients and control participants as studied by both examiners. The level of inter-observer agreement was poor for all parameters except assessment of the CSA of IJV at the thyroid level. Findings meeting CCSVI criterion 3 (CSA ≤ 0.3 cm(2)) were observed in 18/40 (45%) of the control participants, in 24/37 (65%) of MS ≤ 2 patients (p = 0.09 vs. control participants) and in 30/43 (70%) of the MS > 10 patients (p = 0.022 vs. control participants).

CONCLUSIONS:

The feasibility of the CCSVI criteria for common use is questionable because of low inter-observer agreement. Small-calibre IJVs meeting the CCSVI criterion 3 appear common in both Finnish control participants and MS patients, but the clinical significance of this finding is questionable.

KEYWORDS:

CCSVI; Doppler ultrasound; Internal jugular vein; Multiple sclerosis

PMID:
23920002
DOI:
10.1016/j.ejvs.2013.07.003
[Indexed for MEDLINE]
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