The thermodilution method for the clinical assessment of cardiac output

Jansen, Jos R. C.

doi:10.1007/bf01711553

Cited by 87 publications

(59 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Thermodilution is widely and reliably used as a clinical standard to measure cardiac output in the critical-care setting [15,16]. The thermodilution technique has been shown to be accurate when a stationary flow is present and a series of precautions are taken into account [3,17]. With respect to the recently discussed association between thermodilution determination of cardiac output in the initial care of critically ill patients and increase in mortality, less invasive techniques may be preferable.…”

Section: Discussionmentioning

confidence: 99%

“…For more than 25 years, pulmonary artery catheterisation has been the clinical standard in the management of the haemodynamically unstable patient and, in particular, for determining cardiac output. However, both methodological and patient-related theoretical and practical problems have been described with respect to estimation of cardiac output by the thermodilution technique [3]. In mechanically ventilated patients, left ventricular compliance may vary significantly throughout the ventilatory cycle [4].…”

mentioning

confidence: 99%

See 1 more Smart Citation

A comparison of transoesophageal echocardiographic Doppler across the aortic valve and the thermodilution technique for estimating cardiac output

Poelaert¹,

Schmidt²,

Aken³

et al. 1999

Anaesthesia

View full text Add to dashboard Cite

SummaryThis study was undertaken in order to elucidate the differences between various planes of measurement and Doppler techniques (pulsed-vs. continuous-wave Doppler) across the aortic valve to estimate cardiac output. In 45 coronary artery bypass patients, cardiac output was measured each time using four different Doppler techniques (transverse and longitudinal plane, pulsed-and continuous-wave Doppler) and compared with the thermodilution technique. Measurements were performed after induction of anaesthesia and shortly after arrival in the intensive care unit. Optimal imaging was obtained in 91% of the patients, in whom a total of 82 measurements of cardiac output were performed. The respective mean (SD) areas of the aortic valve were 3.77 (0.71) cm 2 in the transverse plane and 3.86 (0.89) cm 2 in the longitudinal plane. A correlation of 0.87 was found between pulsed-wave Doppler cardiac output and the thermodilution technique in either transverse or longitudinal plane. Correlation coefficients of 0.82 and 0.84 were found between thermodilution cardiac output and transverse and longitudinal continuous-wave Doppler cardiac output, respectively. Although thermodilution cardiac output is a widely accepted clinical standard, transoesophageal Doppler echocardiography across the aortic valve offers adequate estimations of cardiac output. In particular, pulsed-wave Doppler cardiac output in both the transverse and longitudinal plane provides useful data.

show abstract

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

A comparison of transoesophageal echocardiographic Doppler across the aortic valve and the thermodilution technique for estimating cardiac output

Poelaert¹,

Schmidt²,

Aken³

et al. 1999

Anaesthesia

View full text Add to dashboard Cite

show abstract

“…One more disadvantage of model-based algorithms is their limitation to a specific contour shape. Different projections, such as long and short axis views, 4 require different models.…”

Section: Introductionmentioning

confidence: 99%

Cardiac Image Segmentation for Contrast Agent Videodensitometry

Mischi

Kalker

Korsten

2005

IEEE Trans. Biomed. Eng.

View full text Add to dashboard Cite

Abstract-Indicator dilution techniques are widely used in the intensive care unit and operating room for cardiac parameter measurements. However, the invasiveness of current techniques represents a limitation for their clinical use. The development of stable ultrasound contrast agents allows new applications of the indicator dilution method. Ultrasound contrast agent dilutions permit an echographic noninvasive measurement of cardiac output, ejection fraction, and blood volumes. The indicator dilution curves are measured by videodensitometry of specific regions of interest and processed for the cardiac parameter assessment. Therefore, the major indicator dilution imaging issue is the detection of proper contrast videodensitometry regions that maximize the signal-to-noise ratio of the measured indicator dilution curves. This paper presents an automatic contour detection algorithm for indicator dilution videodensitometry. The algorithm consists of a radial filter combined with an outlier correction. It maximizes the region of interest by excluding cardiac structures that act as interference to the videodensitometric analysis. It is fast, projection independent, and allows the simultaneous detection of multiple contours in real time. The system is compared to manual contour definition on both echographic and magnetic resonance images.

show abstract

“…Clearly, the still accepted clinical standard for CO measurement is the intermittent thermodilution technique which itself has its own inherent variability [26][27][28]. USCOM is a noninvasive cardiac output monitor based on the transthoracic measurement of Doppler flow velocity over the aortic and pulmonary outflow tract.…”

Section: Discussionmentioning

confidence: 99%