Heart & lung : the journal of critical care
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Comparative Study
Evaluation of impedance cardiography: comparison of NCCOM3-R7 with Fick and thermodilution methods.
To assess the degree of error of the BoMed NCCOM3 model revision seven (R7) impedance cardiograph in determining stroke volume and estimated cardiac output. ⋯ The NCCOM3-R7 has a clinically unacceptable level of error for evaluating cardiac performance in patients with heart disease.
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To determine whether combined use of the parameters of mixed venous oxygen saturation, arterial oxygen saturation obtained by pulse oximetry (Spo2), and vital signs correlated with arterial blood gas variables (ABGs) better than each individual variable during weaning of postoperative cardiac surgery patients from mechanical ventilation; and to evaluate the relationship of derived parameters: oxygen extraction index and ventilation/perfusion index (VQI), and ABGs. ⋯ The use of multiple parameters was no more useful in predicting ABGs than individual variables of Spo2 and respiratory rate. The derived VQI parameter correlated with ABGs. The use of VQI in conjunction with Spo2 and respiratory rate may assist in patient monitoring during weaning and reduce the number of ABGs needed.