PMID- 1417293
OWN - NLM
STAT- MEDLINE
DCOM- 19921118
LR  - 20190628
IS  - 0003-4975 (Print)
IS  - 0003-4975 (Linking)
VI  - 54
IP  - 5
DP  - 1992 Nov
TI  - Comparison of cardiac output measured by intrapulmonary artery Doppler, 
      thermodilution, and electromagnetometry.
PG  - 959-66
AB  - A Doppler pulmonary artery catheter system (Doppler cardiac output monitor or 
      DOPCOM) that continuously measures instantaneous and mean cardiac output was 
      recently introduced. Because thermodilution (TD) flow measurements may not 
      represent an adequate standard, the present study was designed to compare TD and 
      DOPCOM cardiac output measurements with aortic electromagnetic (EM) flow in 
      cardiac surgical patients. Twenty-one patients scheduled for elective coronary 
      artery bypass grafting were enrolled in the study. Simultaneous measurement of 
      cardiac output by all three methods was performed before cardiopulmonary bypass, 
      after cardiopulmonary bypass with the aorta cannulated and volume intermittently 
      infused, and after decannulation. Analysis of all data demonstrated fair TD and 
      EM correlation (r = 0.80), with minimal bias (0.03 +/- 1.21 L/min) and a median 
      absolute error of 0.53 L/min; DOPCOM and EM data showed moderate correlation (r = 
      0.64), a bias of -0.61 +/- 1.50 L/min, and a median absolute error the same as TD 
      (0.51 L/min). However, distribution of DOPCOM values was heavily skewed by 3 
      patients in whom flow measurements immediately after cardiopulmonary bypass were 
      markedly different between the DOPCOM and electromagnetometry, probably because 
      of malposition of the Doppler transducers secondary to partial catheter 
      withdrawal during bypass. Consistent with this theory was the finding that before 
      CPB, the DOPCOM was significantly better than TD in predicting EM flow (median 
      absolute error: DOPCOM, 0.12 L/min, and TD, 0.48 L/min; p = 0.04). Our data 
      suggest that, in general, the DOPCOM shows similar precision to TD for predicting 
      EM flow measurements, although the DOPCOM may underestimate actual flow.(ABSTRACT 
      TRUNCATED AT 250 WORDS)
FAU - Heerdt, P M
AU  - Heerdt PM
AD  - Section of Cardiothoracic Anesthesia, Washington University School of Medicine, 
      St. Louis, Missouri 63110.
FAU - Pond, C G
AU  - Pond CG
FAU - Blessios, G A
AU  - Blessios GA
FAU - Rosenbloom, M
AU  - Rosenbloom M
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PL  - Netherlands
TA  - Ann Thorac Surg
JT  - The Annals of thoracic surgery
JID - 15030100R
SB  - IM
MH  - Animals
MH  - Blood Flow Velocity
MH  - Blood Pressure
MH  - *Cardiac Output
MH  - Catheterization
MH  - Coronary Artery Bypass
MH  - Dogs
MH  - Electromagnetic Phenomena
MH  - Humans
MH  - Pulmonary Artery/*diagnostic imaging/physiology
MH  - *Thermodilution
MH  - Ultrasonography
EDAT- 1992/11/01 00:00
MHDA- 1992/11/01 00:01
CRDT- 1992/11/01 00:00
PHST- 1992/11/01 00:00 [pubmed]
PHST- 1992/11/01 00:01 [medline]
PHST- 1992/11/01 00:00 [entrez]
AID - 0003-4975(92)90660-V [pii]
AID - 10.1016/0003-4975(92)90660-v [doi]
PST - ppublish
SO  - Ann Thorac Surg. 1992 Nov;54(5):959-66. doi: 10.1016/0003-4975(92)90660-v.