Evaluation of an Esophageal Stethoscope as an Early Predictor of Serious Cardiovascular Insufficiency in the Dog

CHRISTINA M. WAELCHLI‐SUTER, WAYNE N. McDONELL, Peter J Pascoe, STEPHANIE DOUTHWAITE

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Accuracy of an esophageal stethoscope combined with a vital signs monitor (VSM) was evaluated as an early predictor of cardiovascular failure during anesthesia. In 10 anesthetized dogs, hypotension and reduction in cardiac output were induced by gradually increasing the inspired halothane concentration. Cardiovascular performance and intensity of heart sounds recorded by the esophageal stethoscope and amplified by the VSM were assessed as depth of anesthesia was increased. Halothane concentration was increased until cardiovascular performance was reduced to a point where heart sounds were no longer audible from the VSM. The esophageal stethoscope in combination with the VSM was easy to use and the unit had an excellent signal to noise ratio. However, usefulness of the esophageal stethoscope as an early predictor of serious cardiovascular depression could not be substantiated. In three dogs, cardiac arrest occurred simultaneously with the loss of heart sounds and in the remaining seven dogs, sound loss occurred when the degree of cardiovascular depression was life threatening.

Original languageEnglish (US)
Pages (from-to)453-457
Number of pages5
JournalVeterinary Surgery
Volume15
Issue number6
DOIs
StatePublished - 1986
Externally publishedYes

Fingerprint

Stethoscopes
Vital Signs
heart sounds
Heart Sounds
Dogs
monitoring
dogs
halothane
Halothane
Anesthesia
depth of anesthesia
cardiac arrest
hypotension
Signal-To-Noise Ratio
cardiac output
Heart Arrest
Cardiac Output
Hypotension
anesthesia

ASJC Scopus subject areas

  • veterinary(all)

Cite this

Evaluation of an Esophageal Stethoscope as an Early Predictor of Serious Cardiovascular Insufficiency in the Dog. / WAELCHLI‐SUTER, CHRISTINA M.; McDONELL, WAYNE N.; Pascoe, Peter J; DOUTHWAITE, STEPHANIE.

In: Veterinary Surgery, Vol. 15, No. 6, 1986, p. 453-457.

Research output: Contribution to journalArticle

WAELCHLI‐SUTER, CHRISTINA M. ; McDONELL, WAYNE N. ; Pascoe, Peter J ; DOUTHWAITE, STEPHANIE. / Evaluation of an Esophageal Stethoscope as an Early Predictor of Serious Cardiovascular Insufficiency in the Dog. In: Veterinary Surgery. 1986 ; Vol. 15, No. 6. pp. 453-457.
@article{ca170051d41f41dcbaf365578b1b32a8,
title = "Evaluation of an Esophageal Stethoscope as an Early Predictor of Serious Cardiovascular Insufficiency in the Dog",
abstract = "Accuracy of an esophageal stethoscope combined with a vital signs monitor (VSM) was evaluated as an early predictor of cardiovascular failure during anesthesia. In 10 anesthetized dogs, hypotension and reduction in cardiac output were induced by gradually increasing the inspired halothane concentration. Cardiovascular performance and intensity of heart sounds recorded by the esophageal stethoscope and amplified by the VSM were assessed as depth of anesthesia was increased. Halothane concentration was increased until cardiovascular performance was reduced to a point where heart sounds were no longer audible from the VSM. The esophageal stethoscope in combination with the VSM was easy to use and the unit had an excellent signal to noise ratio. However, usefulness of the esophageal stethoscope as an early predictor of serious cardiovascular depression could not be substantiated. In three dogs, cardiac arrest occurred simultaneously with the loss of heart sounds and in the remaining seven dogs, sound loss occurred when the degree of cardiovascular depression was life threatening.",
author = "WAELCHLI‐SUTER, {CHRISTINA M.} and McDONELL, {WAYNE N.} and Pascoe, {Peter J} and STEPHANIE DOUTHWAITE",
year = "1986",
doi = "10.1111/j.1532-950X.1986.tb00264.x",
language = "English (US)",
volume = "15",
pages = "453--457",
journal = "Veterinary Surgery",
issn = "0161-3499",
publisher = "Wiley-Blackwell",
number = "6",

}

TY - JOUR

T1 - Evaluation of an Esophageal Stethoscope as an Early Predictor of Serious Cardiovascular Insufficiency in the Dog

AU - WAELCHLI‐SUTER, CHRISTINA M.

AU - McDONELL, WAYNE N.

AU - Pascoe, Peter J

AU - DOUTHWAITE, STEPHANIE

PY - 1986

Y1 - 1986

N2 - Accuracy of an esophageal stethoscope combined with a vital signs monitor (VSM) was evaluated as an early predictor of cardiovascular failure during anesthesia. In 10 anesthetized dogs, hypotension and reduction in cardiac output were induced by gradually increasing the inspired halothane concentration. Cardiovascular performance and intensity of heart sounds recorded by the esophageal stethoscope and amplified by the VSM were assessed as depth of anesthesia was increased. Halothane concentration was increased until cardiovascular performance was reduced to a point where heart sounds were no longer audible from the VSM. The esophageal stethoscope in combination with the VSM was easy to use and the unit had an excellent signal to noise ratio. However, usefulness of the esophageal stethoscope as an early predictor of serious cardiovascular depression could not be substantiated. In three dogs, cardiac arrest occurred simultaneously with the loss of heart sounds and in the remaining seven dogs, sound loss occurred when the degree of cardiovascular depression was life threatening.

AB - Accuracy of an esophageal stethoscope combined with a vital signs monitor (VSM) was evaluated as an early predictor of cardiovascular failure during anesthesia. In 10 anesthetized dogs, hypotension and reduction in cardiac output were induced by gradually increasing the inspired halothane concentration. Cardiovascular performance and intensity of heart sounds recorded by the esophageal stethoscope and amplified by the VSM were assessed as depth of anesthesia was increased. Halothane concentration was increased until cardiovascular performance was reduced to a point where heart sounds were no longer audible from the VSM. The esophageal stethoscope in combination with the VSM was easy to use and the unit had an excellent signal to noise ratio. However, usefulness of the esophageal stethoscope as an early predictor of serious cardiovascular depression could not be substantiated. In three dogs, cardiac arrest occurred simultaneously with the loss of heart sounds and in the remaining seven dogs, sound loss occurred when the degree of cardiovascular depression was life threatening.

UR - http://www.scopus.com/inward/record.url?scp=84995145222&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84995145222&partnerID=8YFLogxK

U2 - 10.1111/j.1532-950X.1986.tb00264.x

DO - 10.1111/j.1532-950X.1986.tb00264.x

M3 - Article

AN - SCOPUS:84995145222

VL - 15

SP - 453

EP - 457

JO - Veterinary Surgery

JF - Veterinary Surgery

SN - 0161-3499

IS - 6

ER -