Journal of clinical monitoring and computing
-
J Clin Monit Comput · Jun 2009
Randomized Controlled TrialImproved accuracy of cardiac output estimation by the partial CO2 rebreathing method.
This study investigated the accuracy of the NICO monitor equipped with the newer software. Additionally, the effects of the increased dead space produced by the NICO monitor on ventilatory settings were investigated. ⋯ This study demonstrated the improved performance of the NICO monitor with updated software. The performance of the NICO monitor with ver. 4.2 or later software is similar to CCO. However, the cardiac output measurement did not fulfill the criteria of interchangeability to the cardiac output measurement by bolus thermodilution. Updates to ver. 5.0 attenuated the effects of rebreathing introduced by the NICO monitor without compromising the accuracy of the cardiac output measurement.
-
J Clin Monit Comput · Jun 2009
Randomized Controlled Trial Comparative StudyComparison between a dorsal and a belt tactile display prototype for decoding physiological events in the operating room.
Vibrotactile display technology represents an innovative method to communicate vital information on patients from physiological monitoring devices to clinicians. The increasing number of sensors used in clinical practice has increased the amount of information required to be communicated, overwhelming the capacity of visual and auditory displays. The capacity to communicate could be increased with the use of a tactile display. In this study, we have compared a dorsal (DTD) and belt tactile (TB) display prototype in terms of learnability, error rate, and efficiency. ⋯ The communication of information on physiological parameters by tactile displays was easy to learn and accurate for both prototypes. The DTD was easier to learn and affected less by distraction. Further evaluation is required in a clinical setting with expert users to determine the clinical applicability of these prototypes.
-
J Clin Monit Comput · Jun 2009
Comparative Study Clinical TrialCardiac index value measurement by invasive, semi-invasive and non invasive techniques: a prospective study in postoperative off pump coronary artery bypass surgery patients.
The authors prospectively compared three techniques of continuous cardiac index measurements. They were, invasive Continuous Cardiac Index using thermodilution flow-directed Swan-Ganz pulmonary artery catheters, semi invasive Flotrac-arterial pressure derived cardiac index and the non invasive cardiac index measurement-body impedance plethsmography. The cardiac index measurements were made simultaneously in the postoperative period in 20 patients who underwent elective uncomplicated off pump coronary artery bypass graft. ⋯ The values obtained were interchangeable. The bias and precision respectively were 0.02 and +/-0.06 for continuous cardiac index and Flotrac, 0.18 and +/-0.08 for Flotrac and body impedance plethysmography and 0.16 and +/-0.08 for continuous cardiac index and body impedance plethysmography. Flotrac appears to be more useful during off pump coronary artery bypass surgery.