Document Detail

Intraoperative use of a new angle-independent Doppler system to measure arterial velocities after carotid endarterectomy.
MedLine Citation:
PMID:  12563209     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: The purpose of this study was to assess the intraoperative use of a new angle-independent ultrasound scan device (EchoFlow [EF]) in measurement of carotid artery velocities after endarterectomy. Specifically, the purpose was to determine the reproducibility of velocity measurements obtained with EF and to compare these measurements with the velocity measurements obtained with duplex ultrasound scan.
METHODS: Velocity measurements of the common, internal, and external carotid arteries were performed by the operative surgeon with EF in 65 consecutive patients after carotid endarterectomy (36 female, 29 male; mean age, 71 years). Three velocity measurements were obtained from each of the arteries with EF and compared with the velocity measurements obtained with duplex ultrasound scan performed by a radiologist.
RESULTS: Velocity measurements obtained with the EF device were reproducible in the common, internal, and external carotid arteries (intrapatient correlation coefficients, 0.95, 0.96, and 0.95, respectively). Seventy-five percent of common, 88% of internal, and 78% of external carotid velocity measurements obtained with the angle-independent ultrasound scan device were within 25 cm/s of the velocities measured with duplex ultrasound scan. The mean differences in velocity measurements between EF and duplex scan were -12 cm/s in the common, -8 cm/s in the internal, and -11 cm/s in the external carotid arteries. Differences between the EF device and duplex scan velocity measurements correlated with increasing arterial velocities in each of the three arteries measured (P <.05).
CONCLUSION: Reproducible measurements of carotid artery velocity may be obtained with a new angle-independent Doppler system after endarterectomy. Most measurements obtained with the EF system are clinically comparable with those obtained with standard duplex ultrasound scan. This novel low-cost device may be useful in the intraoperative assessment of hemodynamic adequacy of carotid endarterectomy.
Todd E Rasmussen; Jean M Panneton; Manju Kalra; Jan M Hofer; Bradley D Lewis; Charles M Rowland; Thomas C Bower; Kenneth J Cherry; Audra A Noel; Peter Gloviczki
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Publication Detail:
Type:  Evaluation Studies; Journal Article    
Journal Detail:
Title:  Journal of vascular surgery     Volume:  37     ISSN:  0741-5214     ISO Abbreviation:  J. Vasc. Surg.     Publication Date:  2003 Feb 
Date Detail:
Created Date:  2003-02-03     Completed Date:  2003-02-25     Revised Date:  2012-10-03    
Medline Journal Info:
Nlm Unique ID:  8407742     Medline TA:  J Vasc Surg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  374-80     Citation Subset:  IM    
Division of Vascular Surgery, Mayo Clinic and Mayo Medical School, Rochester, MN 55905, USA.
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MeSH Terms
Aged, 80 and over
Blood Flow Velocity / physiology*
Carotid Artery, External / physiopathology*,  surgery,  ultrasonography*
Carotid Artery, Internal / physiopathology*,  surgery,  ultrasonography*
Carotid Stenosis / physiopathology,  surgery*,  ultrasonography*
Endarterectomy, Carotid / instrumentation*
Equipment Design
Middle Aged
Monitoring, Intraoperative / instrumentation*
Reproducibility of Results
Ultrasonography, Doppler / instrumentation*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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