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Critical Care
Published in: Critical Care 3/2000

Open Access 01-06-2000 | Research

Relationships between volume and pressure measurements and stroke volume in critically ill patients

Authors: Alexander JGH Bindels, Johannes G van der Hoeven, Antonie D Graafland, Jan de Koning, Arend E Meinders

Published in: Critical Care | Issue 3/2000

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Abstract

Objective

To evaluate the relationships between the changes in stroke volumeindex (SVI), measured in both the aorta and the pulmonary artery, and thechanges in intrathoracic blood volume index (ITBVI), as well as therelationship between changes in aortic SVI and changes in the pulmonary arterywedge pressure (PAWP).

Design

Prospective study with measurements at predeterminedintervals.

Setting

Medical intensive care unit of a university hospital.

Patients and methods

One hundred and fifty-four measurements were taken in 45critically ill patients with varying underlying disorders. Aortic SVI andpulmonary arterial SVI were determined with thermodilution. PAWP was measuredusing a pulmonary artery catheter. ITBVI was determined with thermal-dyedilution, using a commercially available computer system.

Results

A good correlation was found between changes in ITBVI and changesin aortic SVI. However, this correlation weakened when changes in ITBVI wereplotted against changes in pulmonary arterial SVI, which was in part probablydue to mathematical coupling between ITBVI and aortic SVI. A good correlationbetween changes in ITBVI and changes in aortic SVI could also be established inmost of the individual patients. No correlation was found between changes inPAWP and changes in aortic SVI.

Conclusion

ITBVI seems to be a better predictor of SVI than PAWP. ITBVI maybe more suitable than PAWP for assessing cardiac filling in clinicalpractice.
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Metadata
Title
Relationships between volume and pressure measurements and stroke volume in critically ill patients
Authors
Alexander JGH Bindels
Johannes G van der Hoeven
Antonie D Graafland
Jan de Koning
Arend E Meinders
Publication date
01-06-2000
Publisher
BioMed Central
Published in
Critical Care / Issue 3/2000
Electronic ISSN: 1364-8535
DOI
https://doi.org/10.1186/cc693

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