A multicenter evaluation of a new continuous cardiac output pulmonary artery catheter system

Mihm, Frederick G.; Gettinger, Andrew; Hanson, C. William; Gilbert, Hugh C.; Stover, E P; Vender, Jeffery S.; Beerle, Brion J.; Haddow, Gordon R.

doi:10.1097/00003246-199808000-00018

Cited by 59 publications

(16 citation statements)

References 6 publications

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“…The flow through these structures are not controlled, so that the correlation between pump flow and NICOM estimates of CO do not account for these, which combined amount to a small percentage of the total flow. Finally, for the clinical studies, SGC was taken as a gold standard in the clinical study because it is the best available reference for continuous CO monitoring (4,7,10,12). Our interest was comparing the NICOM system with an automatic and continuous monitoring tool.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of a noninvasive continuous cardiac output monitoring system based on thoracic bioreactance

Keren¹,

Burkhoff²,

Squara³

2007

American Journal of Physiology-Heart and Circulatory Physiology

262

203

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Noninvasive cardiac output (CO) measurement can be useful in many clinical settings where invasive monitoring is not desired. Bioimpedance (intrabeat measurement of changes in transthoracic voltage amplitude in response to an injected high-frequency current) has been explored for this purpose but is limited in some clinical settings because of inherently low signal-to-noise ratio. Since changes in fluid content also induce changes in thoracic capacitive and inductive properties, we tested whether a noninvasive CO measurement could be obtained through measurement of the relative phase shift of an injected current (i.e., bioreactance). We constructed a prototype device that applies a 75-kHz current and determines the relative phase shift (dΦ/d t) of the recorded transthoracic voltage. CO was related to the product of peak dΦ/d t, heart rate, and ventricular ejection time. The preclinical study was done in nine open-chest pigs put on right heart bypass so that CO could be varied at known values. This was followed by a feasibility study in 27 postoperative patients who had a Swan-Ganz catheter (SGC). The measurements of noninvasive CO measurement and cardiopulmonary bypass pump correlated to each other ( r = 0.84) despite the large variation in CO and temperatures. Similarly, in patients, mean CO values were 5.18 and 5.17 l/min as measured by SGC and the noninvasive CO measurement system, respectively, and were highly correlated over the range of values studied ( r = 0.90). Preclinical and clinical data demonstrate the feasibility of using blood flow-related phase shifts of transthoracic electric signals to perform noninvasive continuous CO monitoring.

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Section: Discussionmentioning

confidence: 99%

Evaluation of a noninvasive continuous cardiac output monitoring system based on thoracic bioreactance

Keren¹,

Burkhoff²,

Squara³

2007

American Journal of Physiology-Heart and Circulatory Physiology

262

203

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“…The multiple frequencies are used to maximize the signal to noise ratio, however, one fundamental frequency of 20 sec of a 40-sec repetitive on-off cycle is normally used. 5,22 After each 20-sec signal thermodilution washout curves are analyzed separately.…”

Section: Discussionmentioning

confidence: 99%

Continuous cardiac output measurements do not agree with conventional bolus thermodilution cardiac output determination

Zöllner

Goetz

Weis

et al. 2001

Can J Anesth/J Can Anesth

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“…61 The Q2plus system (Hospira, Lake Forest, IL) applies 20-second heat pulses to a coiled filament in a repetitive on-off cycle every 40 seconds. 62 The response from each pulse is analyzed as a separate thermodilution curve. A proprietary averaging algorithm is applied to reduce the influence of thermal noise.…”

Section: Continuous Pa Thermodilution Co Technical Descriptionmentioning

confidence: 99%

Cardiac Output Monitoring Using Indicator-Dilution Techniques: Basics, Limits, and Perspectives

Reuter

Huang²,

Edrich³

et al. 2010

Anesthesia &Amp; Analgesia

239

200

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The ability to monitor cardiac output is one of the important cornerstones of hemodynamic assessment for managing critically ill patients at increased risk for developing cardiac complications, and in particular in patients with preexisting cardiovascular comorbidities. For >30 years, single-bolus thermodilution measurement through a pulmonary artery catheter for assessment of cardiac output has been widely accepted as the "clinical standard" for advanced hemodynamic monitoring. In this article, we review this clinical standard, along with current alternatives also based on the indicator-dilution technique, such as the transcardiopulmonary thermodilution and lithium dilution techniques. In this review, not only the underlying technical principles and the unique features but also the limitations of each application of indicator dilution are outlined.

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A multicenter evaluation of a new continuous cardiac output pulmonary artery catheter system

Cited by 59 publications

References 6 publications

Evaluation of a noninvasive continuous cardiac output monitoring system based on thoracic bioreactance

Evaluation of a noninvasive continuous cardiac output monitoring system based on thoracic bioreactance

Continuous cardiac output measurements do not agree with conventional bolus thermodilution cardiac output determination

Cardiac Output Monitoring Using Indicator-Dilution Techniques: Basics, Limits, and Perspectives

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