| Magnetic resonance venous velocity mapping during intermittent pneumatic compression of the calf and foot. | |
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MedLine Citation:
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PMID: 22156366 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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OBJECTIVE: Assessment and optimization of intermittent pneumatic compression (IPC) devices for prophylaxis of deep vein thrombosis has previously used duplex ultrasound. The aim was to investigate novel magnetic resonance (MR) venous velocity mapping (VM) for IPC research and development. METHODS: Twelve normal subjects were scanned in the supine position using realtime MR VM with sequential foot and calf IPC (120 mmHg) at 1.5 T. Measurements were taken in the popliteal vein at baseline using both cuffs and each cuff individually recording 60 seconds continuously. Temporal resolution was 310 ms per independent image, at 1 × 1 mm spatial resolution. RESULTS: Peak velocity (V(p)) measurements: baseline, V(p) = 2.1 cm/second (range = 1.1-3.5); using both compression cuffs, V(p) = 41.5 cm/second (18.0-58.1); calf cuff alone, V(p) = 40.6 cm/second (18.1-62.2); foot cuff alone, V(p) = 7.9 cm/second (4.2-15.3). Flow volume measurements per compression cycle (F): baseline, F = 2.3 cm(3) (0.5-11.4); both compression cuffs, F = 7.1 cm(3) (2.5-24.6); calf cuff only, F = 7.1 cm(3) (2.4-24.5); foot cuff only, F = 2.6 cm(3) (0.9-10.7). The foot cuff contribution was insignificant when combined with the calf cuff (P < 0.01). The MR venous VM results were similar to those reported elsewhere using ultrasound. CONCLUSION: This novel technique for MR venous VM can measure the realtime variations in venous blood flow during IPC. |
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Authors:
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I T Pierce; P D Gatehouse; E Kalodiki; C Lattimer; G Geroulakos; X Y Xu; D N Firmin |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-12-8 |
Journal Detail:
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Title: Phlebology / Venous Forum of the Royal Society of Medicine Volume: - ISSN: 1758-1125 ISO Abbreviation: - Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2011-12-13 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9012921 Medline TA: Phlebology Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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* Cardiovascular MR Unit, Royal Brompton Hospital Trust. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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