Evaluation of transesophageal echo-Doppler ultrasonography for the measurement of aortic blood flow in anesthetized cats

Marlis L. Rezende, Bruno H Pypendop, Jan Ilkiw

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Objective - To evaluate the use of a transesophageal echo-Doppler ultrasonography (TED) technique for measurement of aortic blood flow (ABF) in relation to cardiac output (CO) measured by use of a thermodilution technique in anesthetized cats. Animals - 6 adult cats (mean ± SD body weight, 5 ± 0.7 kg). Procedures - Anesthesia was induced and maintained in cats by administration of isoflurane. A thermodilution catheter was placed in a pulmonary artery. The TED probe was positioned in the esophagus in the region where the aorta and esophagus are almost parallel. Five baseline values for ABF and CO were concurrently recorded. Cats were randomly assigned to a high or low CO state (increase or decrease in CO by at least 25% from baseline, respectively). Baseline conditions were restored, and the other CO state was induced, after which baseline conditions were again restored. For each CO state, ABF and CO were measured 5 times at 5-minute intervals. Correlation and agreement between the techniques were determined by use of the Pearson product-moment correlation and Bland-Altman method. Results - CO ranged from 0.16 to 0.75 L/min and ABF from 0.05 to 0.48 L/ min. Overall data analysis revealed a high correlation (r = 0.884) between techniques but poor agreement (limits of agreement, -0.277 to 0.028 L/min). During the low CO state, correlation between techniques was low (r = 0.413). Conclusions and Clinical Relevance - TED did not accurately measure CO. However, it allowed evaluation of CO patterns and may be useful clinically in anesthetized cats.

Original languageEnglish (US)
Pages (from-to)1135-1140
Number of pages6
JournalAmerican Journal of Veterinary Research
Volume69
Issue number9
DOIs
StatePublished - Sep 2008

Fingerprint

Doppler Ultrasonography
cardiac output
Cardiac Output
ultrasonography
blood flow
Cats
cats
Low Cardiac Output
Thermodilution
Esophagus
esophagus
High Cardiac Output
methodology
Isoflurane
pulmonary artery
Pulmonary Artery
isoflurane
Aorta
aorta
catheters

ASJC Scopus subject areas

  • veterinary(all)

Cite this

@article{a007092204694eea909579a86c545ebd,
title = "Evaluation of transesophageal echo-Doppler ultrasonography for the measurement of aortic blood flow in anesthetized cats",
abstract = "Objective - To evaluate the use of a transesophageal echo-Doppler ultrasonography (TED) technique for measurement of aortic blood flow (ABF) in relation to cardiac output (CO) measured by use of a thermodilution technique in anesthetized cats. Animals - 6 adult cats (mean ± SD body weight, 5 ± 0.7 kg). Procedures - Anesthesia was induced and maintained in cats by administration of isoflurane. A thermodilution catheter was placed in a pulmonary artery. The TED probe was positioned in the esophagus in the region where the aorta and esophagus are almost parallel. Five baseline values for ABF and CO were concurrently recorded. Cats were randomly assigned to a high or low CO state (increase or decrease in CO by at least 25{\%} from baseline, respectively). Baseline conditions were restored, and the other CO state was induced, after which baseline conditions were again restored. For each CO state, ABF and CO were measured 5 times at 5-minute intervals. Correlation and agreement between the techniques were determined by use of the Pearson product-moment correlation and Bland-Altman method. Results - CO ranged from 0.16 to 0.75 L/min and ABF from 0.05 to 0.48 L/ min. Overall data analysis revealed a high correlation (r = 0.884) between techniques but poor agreement (limits of agreement, -0.277 to 0.028 L/min). During the low CO state, correlation between techniques was low (r = 0.413). Conclusions and Clinical Relevance - TED did not accurately measure CO. However, it allowed evaluation of CO patterns and may be useful clinically in anesthetized cats.",
author = "Rezende, {Marlis L.} and Pypendop, {Bruno H} and Jan Ilkiw",
year = "2008",
month = "9",
doi = "10.2460/ajvr.69.9.1135",
language = "English (US)",
volume = "69",
pages = "1135--1140",
journal = "American Journal of Veterinary Research",
issn = "0002-9645",
publisher = "American Veterinary Medical Association",
number = "9",

}

TY - JOUR

T1 - Evaluation of transesophageal echo-Doppler ultrasonography for the measurement of aortic blood flow in anesthetized cats

AU - Rezende, Marlis L.

AU - Pypendop, Bruno H

AU - Ilkiw, Jan

PY - 2008/9

Y1 - 2008/9

N2 - Objective - To evaluate the use of a transesophageal echo-Doppler ultrasonography (TED) technique for measurement of aortic blood flow (ABF) in relation to cardiac output (CO) measured by use of a thermodilution technique in anesthetized cats. Animals - 6 adult cats (mean ± SD body weight, 5 ± 0.7 kg). Procedures - Anesthesia was induced and maintained in cats by administration of isoflurane. A thermodilution catheter was placed in a pulmonary artery. The TED probe was positioned in the esophagus in the region where the aorta and esophagus are almost parallel. Five baseline values for ABF and CO were concurrently recorded. Cats were randomly assigned to a high or low CO state (increase or decrease in CO by at least 25% from baseline, respectively). Baseline conditions were restored, and the other CO state was induced, after which baseline conditions were again restored. For each CO state, ABF and CO were measured 5 times at 5-minute intervals. Correlation and agreement between the techniques were determined by use of the Pearson product-moment correlation and Bland-Altman method. Results - CO ranged from 0.16 to 0.75 L/min and ABF from 0.05 to 0.48 L/ min. Overall data analysis revealed a high correlation (r = 0.884) between techniques but poor agreement (limits of agreement, -0.277 to 0.028 L/min). During the low CO state, correlation between techniques was low (r = 0.413). Conclusions and Clinical Relevance - TED did not accurately measure CO. However, it allowed evaluation of CO patterns and may be useful clinically in anesthetized cats.

AB - Objective - To evaluate the use of a transesophageal echo-Doppler ultrasonography (TED) technique for measurement of aortic blood flow (ABF) in relation to cardiac output (CO) measured by use of a thermodilution technique in anesthetized cats. Animals - 6 adult cats (mean ± SD body weight, 5 ± 0.7 kg). Procedures - Anesthesia was induced and maintained in cats by administration of isoflurane. A thermodilution catheter was placed in a pulmonary artery. The TED probe was positioned in the esophagus in the region where the aorta and esophagus are almost parallel. Five baseline values for ABF and CO were concurrently recorded. Cats were randomly assigned to a high or low CO state (increase or decrease in CO by at least 25% from baseline, respectively). Baseline conditions were restored, and the other CO state was induced, after which baseline conditions were again restored. For each CO state, ABF and CO were measured 5 times at 5-minute intervals. Correlation and agreement between the techniques were determined by use of the Pearson product-moment correlation and Bland-Altman method. Results - CO ranged from 0.16 to 0.75 L/min and ABF from 0.05 to 0.48 L/ min. Overall data analysis revealed a high correlation (r = 0.884) between techniques but poor agreement (limits of agreement, -0.277 to 0.028 L/min). During the low CO state, correlation between techniques was low (r = 0.413). Conclusions and Clinical Relevance - TED did not accurately measure CO. However, it allowed evaluation of CO patterns and may be useful clinically in anesthetized cats.

UR - http://www.scopus.com/inward/record.url?scp=52649181762&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=52649181762&partnerID=8YFLogxK

U2 - 10.2460/ajvr.69.9.1135

DO - 10.2460/ajvr.69.9.1135

M3 - Article

C2 - 18764683

AN - SCOPUS:52649181762

VL - 69

SP - 1135

EP - 1140

JO - American Journal of Veterinary Research

JF - American Journal of Veterinary Research

SN - 0002-9645

IS - 9

ER -