Measurement of Blood Pressure, Blood Flow and Resistance to Blood Flow in the Systemic Circulation

Ludbrook, John

doi:10.1007/978-1-4615-7924-3_7

Structure and Function of the Circulation 1980

DOI: 10.1007/978-1-4615-7924-3_7

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Measurement of Blood Pressure, Blood Flow and Resistance to Blood Flow in the Systemic Circulation

John Ludbrook

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1999

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“…Although it is the clinical standard of practice, thermodilution is not an ideal reference or "gold standard". Ludbrook 14 describes the evaluation of thermodilution in the 1960s and 1970s where numerous investigators validated TD with direct Fick and dye-dilution methods in humans 15,16 and animals [17][18][19] . Many of these studies were flawed by today's standards for comparison of methods.…”

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confidence: 99%

Measurement of Cardiac Output by Transoesophageal Echocardiography: A Comparison of Two Doppler Methods with Thermodilution

Royse

Blake³

et al. 1999

Anaesth Intensive Care

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This study assessed the agreement between three methods of cardiac output (CO) measurement, thermodilution, the current clinical standard, and two transoesophageal echocardiographic techniques. Measurements were performed in 37 patients using thermodilution, continuous wave Doppler across the aortic valve and pulsed wave Doppler positioned in the left ventricular outflow tract. The aortic valve area was measured by direct planimetry, and the left ventricular outflow tract area was calculated from its diameter. Weighted least products regression analysis was employed to detect bias, and standard deviation of the difference (SDdiff) was calculated. There was no fixed bias but there was proportional bias between continuous wave Doppler and thermodilution methods (SDdiff 0.92 l/min). There was fixed bias but not proportional bias between pulsed wave and thermodilution methods (SDdiff 1.1 l/min). There was neither fixed nor proportional bias between pulsed wave and continuous wave Doppler methods (SDdiff 1.1 l/min). The transoesophageal Doppler methods described can be clinical alternatives to thermodilution cardiac output measurement.

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mentioning

confidence: 99%

Measurement of Cardiac Output by Transoesophageal Echocardiography: A Comparison of Two Doppler Methods with Thermodilution

Royse

Blake³

et al. 1999

Anaesth Intensive Care

View full text Add to dashboard Cite

show abstract

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Measurement of Blood Pressure, Blood Flow and Resistance to Blood Flow in the Systemic Circulation

Cited by 1 publication

References 94 publications

Measurement of Cardiac Output by Transoesophageal Echocardiography: A Comparison of Two Doppler Methods with Thermodilution

Measurement of Cardiac Output by Transoesophageal Echocardiography: A Comparison of Two Doppler Methods with Thermodilution

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