Journal of clinical monitoring and computing
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J Clin Monit Comput · Jun 2008
Comparative Study Controlled Clinical TrialNon-invasive cardiac output by transthoracic electrical bioimpedence in post-cardiac surgery patients: comparison with thermodilution method.
Thoracic electrical bioimpedance (TEB) cardiac output (CO) is being explored increasingly as a non-invasive alternative to the pulmonary artery catheter (PAC). This study compared TEB-CO measured using a new instrument--NICOMON (Larsen & Toubro Ltd. India) with thermodilution (Td) CO in post-cardiac surgery patients. ⋯ Thoracic electrical bioimpedance cardiac output compares favorably with thermodilution method among post-cardiac surgery patients. Further studies are indi- cated with this instrument to validate its efficacy in various clinical situations and utility in monitoring hemodynamic interventions.
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J Clin Monit Comput · Jun 2008
The sound intensity and characteristics of variable-pitch pulse oximeters.
Various studies worldwide have found that sound levels in hospitals significantly exceed the World Health Organization (WHO) guidelines, and that this noise is associated with audible signals from various medical devices. The pulse oximeter is now widely used in health care; however the health effects associated with the noise from this equipment remain largely unclarified. Here, we analyzed the sounds of variable-pitch pulse oximeters, and discussed the possible associated risk of sleep disturbance, annoyance, and hearing loss. ⋯ The results indicate that sounds from pulse oximeters pose a potential risk of not only sleep disturbance and annoyance but also hearing loss, and that these sounds are unnatural for human auditory perception.
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J Clin Monit Comput · Jun 2008
Accuracy of continuous central venous oxygen saturation monitoring in patients undergoing cardiac surgery.
Continuous assessment of central venous oxygen saturation (S(cevox)O(2)) with the CeVOX device (Pulsion Medical Systems, Munich, Germany) was evaluated against central venous oxygen saturation (S(cv)O(2)) determined by co-oximetry. ⋯ In adult patients during and after cardiac surgery, the current version of the CeVOX device might not be the tool to replace S(cv)O(2) determined by co-oxymetry, although sensitivity and specificity of S(cevox)O(2 )to predict substantial changes in S(cv)O(2) were acceptable.
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J Clin Monit Comput · Apr 2008
Multicenter Study Comparative StudyMulticenter evaluation of noninvasive cardiac output measurement by bioreactance technique.
Bioreactance, the analysis of intrabeat variations in phase of a transthoracic voltage in response to an applied high frequency transthoracic current, was recently introduced for noninvasive cardiac output measurement (NICOM). We evaluated NICOM compared to thermo- dilution (TD) in several clinical settings. ⋯ On average, compared to TD, bioreactance- based NICOM has acceptable accuracy in challenging clinical environments. Availability of such a tool may allow clinicians to have information about CO in patients where this information is not currently available to help diagnosis and guide therapy.