Journal of clinical monitoring and computing
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J Clin Monit Comput · Aug 2004
Validation of a noninvasive blood pressure monitoring device in normotensive and hypertensive pediatric intensive care patients.
To evaluate the performance and to define limitations of a noninvasive blood pressure monitoring device in the critically ill pediatric population. ⋯ The noninvasive blood pressure monitor is capable of producing an accurate blood pressure measurement every 12-15 heartbeats in addition to providing a pulse waveform and digital display of the heart rate. Our study showed good agreement between the methods in the normotensive and hypertensive critically ill pediatric population with a wrist circumference limitation defined at > or =11 cm.
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J Clin Monit Comput · Aug 2004
Weaning from long-term mechanical ventilation: a nonpulmonary weaning index.
Despite the extensive investigations in the area of weaning, clinicians are still struggling with the question of when to begin the process of weaning. Clinical weaning indices designed to predict the weaning potential are most frequently based on pulmonary factors. However, many physiological, respiratory, and mechanical factors also have impact on weaning, but are often overlooked. We suggest a new "nonpulmonary weaning index" (NPWI), which assesses the influence of factors such as blood albumin and total blood protein on the weaning success. ⋯ The results of this study suggest that in the decision whether to attempt weaning from long-term mechanical ventilation, more attention should be paid to the nonpulmonary factors.
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J Clin Monit Comput · Aug 2004
The pulse in reflectance pulse oximetry: modeling and experimental studies.
Reflectance pulse oximetry permits the use of alternative monitoring sites such as the face or torso, and is the approach commonly employed in fetal pulse oximetry systems. The purpose of this study is to investigate the impact of assumptions about the nature of arterial pulsatility on the calibration of such systems. ⋯ The sensitivity of reflectance pulse oximetry calibration to the depth and magnitude of arterial pulsatility reinforces the observation that monitoring site selection is of importance in optimizing reflectance pulse oximetry performance, particularly fetal pulse oximetry. Sites with palpable pulsatility should be avoided.
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J Clin Monit Comput · Aug 2004
Clinical TrialThe correlation of the bispectral index with propofol effect site concentrations is not altered by epochs indicated as artefact-loaded by narcotrend.
Artefact detection is an essential feature of automatic EEG monitoring systems used in anaesthesia. Clinical experience indicates that Narcotrend monitoring (MonitorTechnik, Bad Bramstedt, Germany, version 4.0) excludes more EEG epochs because of artefacts than bispectral index monitoring (BIS, Aspect Medical Systems, Newton, MA, version XP). Whether this increased exclusion of epochs is justified has not been investigated yet. ⋯ Exclusion of data pairs that were detected as artefacts by Narcotrend but not by BIS did not change the performance of bispectral index as an indicator of propofol effect site concentration.
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J Clin Monit Comput · Aug 2004
Randomized Controlled Trial Comparative Study Clinical TrialThe effects of isoflurane and propofol on intraoperative neurophysiological monitoring during spinal surgery.
To compare the effects of isoflurane and propofol on intraoperative neurophysiological monitoring (IONM) during spinal surgery. ⋯ Isoflurane inhibited IONM more than propofol. Propofol is recommended for critical spinal surgery, particularly when motor pathway function is monitored.