PMID- 2018214
OWN - NLM
STAT- MEDLINE
DCOM- 19910523
LR  - 20061115
IS  - 0003-2999 (Print)
IS  - 0003-2999 (Linking)
VI  - 72
IP  - 5
DP  - 1991 May
TI  - Comparison of changes in transit time ultrasound, esophageal Doppler, and 
      thermodilution cardiac output after changes in preload, afterload, and 
      contractility in pigs.
PG  - 584-8
AB  - The purpose of this study was to compare how well changes in cardiac output (CO) 
      measured by esophageal Doppler (Doppler) and thermodilution (TD) followed changes 
      in CO measured by transit time ultrasound (TTU). Simultaneous Doppler, TD, and 
      TTU measurements of CO were made before and after changes in preload, afterload, 
      or contractility in seven piglets. Mean changes in each CO method for each type 
      of change in CO were compared by analysis of variance. Changes in TTU CO, TD CO, 
      and Doppler CO were compared by correlation, linear regression, and bias and 
      precision statistics. Of 86 TTU changes in CO greater than 10%, Doppler changed 
      the same direction as TTU 59 times, changed in an opposite direction 6 times, and 
      changes less than 10% 21 times. Thermodilution changed in the same direction as 
      TTU 72 times, in the opposite direction 4 times, and changed less than 10% 10 
      times. Changes (% delta) in TTU and TD measurements of CO were not significantly 
      different in any group. Changes in Doppler CO and TTU CO were different for two 
      afterload and contractility groups. Percent changes in Doppler CO had a 
      correlation coefficient (r) = 0.74, m = 0.72, and bias (mean % delta Doppler CO - 
      mean % delta TTU CO) = 6.3 +/- 29.7 with % delta TTU CO. Percent changes in TD CO 
      had an r = 0.90, m = 0.92, and bias = 5.7 +/- 19.1 with % delta TTU CO. Cardiac 
      output measured by Doppler underestimated changes in CO due to changes in preload 
      and contractility and exaggerated changes in CO due to changes in afterload.
FAU - Wong, D H
AU  - Wong DH
AD  - Department of Anesthesiology, Veterans Administration Medical Center, Long Beach, 
      California 90822.
FAU - Watson, T
AU  - Watson T
FAU - Gordon, I
AU  - Gordon I
FAU - Wesley, R
AU  - Wesley R
FAU - Tremper, K K
AU  - Tremper KK
FAU - Zaccari, J
AU  - Zaccari J
FAU - Stemmer, P
AU  - Stemmer P
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PL  - United States
TA  - Anesth Analg
JT  - Anesthesia and analgesia
JID - 1310650
SB  - IM
MH  - Analysis of Variance
MH  - Animals
MH  - *Cardiac Output
MH  - Esophagus
MH  - Myocardial Contraction
MH  - Swine
MH  - *Thermodilution
MH  - Time Factors
MH  - *Ultrasonics
EDAT- 1991/05/01 00:00
MHDA- 1991/05/01 00:01
CRDT- 1991/05/01 00:00
PHST- 1991/05/01 00:00 [pubmed]
PHST- 1991/05/01 00:01 [medline]
PHST- 1991/05/01 00:00 [entrez]
PST - ppublish
SO  - Anesth Analg. 1991 May;72(5):584-8.