Unilateral vs. bilateral ultrasound in the monitoring of cerebral microemboli

David J Moser; Karin C Ferneyhough; Russell M Bauer; Stephan Arndt; Susan K Schultz; William G Haynes; Edward D Staples; James Alexander; Laurie K Davies; Daniel J O’Brien

doi:10.1016/S0301-5629(01)00381-7

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Unilateral vs. bilateral ultrasound in the monitoring of cerebral microemboli

Journal article

Peer reviewed

Unilateral vs. bilateral ultrasound in the monitoring of cerebral microemboli

David J Moser, Karin C Ferneyhough, Russell M Bauer, Stephan Arndt, Susan K Schultz, William G Haynes, Edward D Staples, James Alexander, Laurie K Davies and Daniel J O’Brien

Ultrasound in medicine & biology, Vol.27(6), pp.757-760

2001

DOI: 10.1016/S0301-5629(01)00381-7

PMID: 11516535

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Abstract

We used bilateral transcranial Doppler to monitor the number of microembolic events (ME) in the left and right middle cerebral arteries of 29 patients during cardiac surgery that required extracorporeal circulation. Based on a previously published study, we hypothesized that the commonly used method of doubling unilateral ME counts to obtain an estimated bihemispheric load would result in significant errors of estimation. In our sample, estimated bihemispheric counts were inaccurate by an average of 18% (range 0–80%). Despite this large range of error, calculation of Cronbach’s alpha revealed that actual error due to unreliability (4%) was small relative to the large variation in ME counts across subjects in this patient series. These findings suggest that unilateral monitoring is sufficient when the goal is to characterize a given subject’s ME load within the context of the other subjects in the sample. However, when precise ME counts are required, bilateral monitoring is essential. (E-mail: david-moser@uiowa.edu)

Cardiopulmonary bypass

Neuropsychological

Microemboli

Cardiac surgery

Ultrasound

Doppler

Extracorporeal circulation

Details

Title: Subtitle: Unilateral vs. bilateral ultrasound in the monitoring of cerebral microemboli
Creators: David J Moser - University of Iowa, Iowa City, IA, USA
Karin C Ferneyhough - University of Iowa, Iowa City, IA, USA
Russell M Bauer - University of Florida, Gainesville, FL, USA
Stephan Arndt - University of Iowa, Iowa City, IA, USA
Susan K Schultz - University of Iowa, Iowa City, IA, USA
William G Haynes - University of Iowa, Iowa City, IA, USA
Edward D Staples - University of Florida, Gainesville, FL, USA
James Alexander - University of Florida, Gainesville, FL, USA
Laurie K Davies - University of Florida, Gainesville, FL, USA
Daniel J O’Brien - University of Florida, Gainesville, FL, USA
Resource Type: Journal article
Publication Details: Ultrasound in medicine & biology, Vol.27(6), pp.757-760
DOI: 10.1016/S0301-5629(01)00381-7
PMID: 11516535
NLM abbreviation: Ultrasound Med Biol
ISSN: 0301-5629
eISSN: 1879-291X
Publisher: Elsevier Inc
Language: English
Date published: 2001
Academic Unit: Psychiatry; Biostatistics; Nursing; Injury Prevention Research Center; Medicine Administration; Internal Medicine
Record Identifier: 9984003924302771

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