PMID- 7880989
OWN - NLM
STAT- MEDLINE
DCOM- 19950407
LR  - 20190909
IS  - 1053-0770 (Print)
IS  - 1053-0770 (Linking)
VI  - 8
IP  - 6
DP  - 1994 Dec
TI  - On-line estimation of cardiac output with a new automated border detection system 
      using transesophageal echocardiography: a preliminary comparison with 
      thermodilution.
PG  - 625-30
AB  - Continuous estimation of cardiac output would be extremely useful for hemodynamic 
      monitoring of patients in the operating room and intensive care settings. A 
      recently developed echocardiographic imaging system provides real-time automated 
      border detection (ABD) with the ability to measure cyclic changes in cavity area, 
      and thus calculate changes in intracavitary volumes. Eight patients undergoing 
      cardiac surgery were studied with intraoperative transesophageal (TEE), and 
      cardiac outputs obtained with this new imaging system were compared with 
      thermodilution (TD). Triplicate measurements were obtained simultaneously at five 
      intraoperative times, three before and two after cardiopulmonary bypass. The 91 
      of 120 measurements with adequate TEE and TD data were analyzed. The average 
      difference between the two techniques (bias) was -0.2 +/- 1.3 L/min. The limits 
      of agreement (bias +/- 2 SD) were -2.8 L/min to 2.4 L/min. The average of the 
      absolute value of the difference between measurements made with the two 
      techniques was 0.9 +/- 0.8 L/min. Linear regression yielded the equation: ABD = 
      0.64TD + 1.57 L/min (r = 0.71). The average difference between the two techniques 
      (bias) for detecting changes in cardiac output between sequential intraoperative 
      times was 0.1 +/- 1.1 L/min. With further development, this new method shows 
      promise for measurement of cardiac output in selected patient care settings.
FAU - Pinto, F J
AU  - Pinto FJ
AD  - Department of Anesthesia, Stanford University School of Medicine, CA 94305-5117.
FAU - Siegel, L C
AU  - Siegel LC
FAU - Chenzbraun, A
AU  - Chenzbraun A
FAU - Schnittger, I
AU  - Schnittger I
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - J Cardiothorac Vasc Anesth
JT  - Journal of cardiothoracic and vascular anesthesia
JID - 9110208
SB  - IM
MH  - Adult
MH  - Aged
MH  - Bias
MH  - Cardiac Output/*physiology
MH  - Cardiac Volume/physiology
MH  - Cardiopulmonary Bypass
MH  - Echocardiography, Transesophageal/*methods/statistics & numerical data
MH  - Humans
MH  - Image Enhancement/methods
MH  - Image Processing, Computer-Assisted
MH  - Linear Models
MH  - Middle Aged
MH  - Monitoring, Intraoperative
MH  - *Online Systems
MH  - *Thermodilution/statistics & numerical data
MH  - Ventricular Function, Left/physiology
EDAT- 1994/12/01 00:00
MHDA- 1994/12/01 00:01
CRDT- 1994/12/01 00:00
PHST- 1994/12/01 00:00 [pubmed]
PHST- 1994/12/01 00:01 [medline]
PHST- 1994/12/01 00:00 [entrez]
AID - 1053-0770(94)90192-9 [pii]
AID - 10.1016/1053-0770(94)90192-9 [doi]
PST - ppublish
SO  - J Cardiothorac Vasc Anesth. 1994 Dec;8(6):625-30. doi: 
      10.1016/1053-0770(94)90192-9.