- Title
- A comparison between thermodilution, electromagnetic and Doppler methods for cardiac output measurement in the rabbit
- Creator
- White, Saxon William; McRitchie, R. J.; Porges, W. L.
- Relation
- Clinical and Experimental Pharmacology and Physiology Vol. 1, Issue 3, p. 175-182
- Publisher Link
- http://dx.doi.org/10.1111/j.1440-1681.1974.tb00540.x
- Publisher
- Wiley-Blackwell Publishing Asia
- Resource Type
- journal article
- Date
- 1974
- Description
- SUMMARY 1. Electromagnetic and Doppler flowmeter methods were compared with the thermodilution technique for the measurement of cardiac output in unanaesthetized rabbits. Cardiac output was varied by haemorrhage and transfusion. 2. All three methods give a satisfactory estimate of cardiac output over a wide range of flows. The electromagnetic method is probably the most accurate; errors due to transducer instability, the use of end-diastolic flow as an index of zero flow, and the failure to detect coronary flow appear negligible. 3. The Doppler flowmeter gives a systematic 3–4% overestimate of cardiac output; the error is most probably due to registration of backflow in the aortic root as forward flow. 4. The thermodilution technique gives a good estimate of cardiac output at low and normal resting cardiac outputs, but is subject to a small but increasing error as cardiac output rises; the error at high flows is of the order of 10%.
- Subject
- blood flow velocity; cardiac output; Doppler ultrasonic; electromagnetic; flowmeter; thermodilution
- Identifier
- http://hdl.handle.net/1959.13/938789
- Identifier
- uon:12680
- Identifier
- ISSN:0305-1870
- Language
- eng
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