Journal of clinical monitoring
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Define the ranges for normal vital signs during general anesthesia. ⋯ Clinicians recognize ranges for vital signs during uneventful anesthesia. These CORs may differ from one stage of anesthesia to the next. Transgressions of these ranges are common. Not all transgressions are treated.
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The purpose of this investigation was to study the N2 flux between the patient and the breathing circuit, and the excess gas during N2O anesthesia with the low, fresh gas flow technique. ⋯ Regardless of the fresh gas flow used, sampled gas need not be returned during N2O anesthesia.
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The objective of this study was to determine the accuracy of a near-patient blood gas and electrolyte analyzer when used by non-laboratory-trained clinicians in the critical care setting. ⋯ The test instrument is accurate and reproducible when used in the clinical setting by non-laboratory-trained individuals. Non-laboratory-trained individuals can obtain laboratory results in the near-patient setting comparable to those obtained by trained laboratory technologists.
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Comparative Study
Arterial pulse contour analysis trending of cardiac output: hemodynamic manipulations during cerebral arteriovenous malformation resection.
Intravascular pressure and cardiac output monitoring are frequently performed in the operating room and intensive care unit. Currently, cardiac output is only measured intermittently, although continuous measurement would be preferable. One method proposed for measuring cardiac output continuously is arterial waveform pulse contour analysis. This study examines the utility of trending cardiac output using pulse contour analysis during manipulations of blood pressure. ⋯ This study demonstrates that during surgery for arteriovenous malformations in the brain, the pulse contour method was able to reflect cardiac output accurately during induced hypotension with esmolol and during restoration of blood pressure with phenylephrine.
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The objective of this study was to prospectively examine the incidence of patient-related failure of pulse oximetry in the postanesthesia care unit (PACU). ⋯ The failure rate and patient characteristics compare favorably with a previously published study of intraoperative pulse oximetry failure. We conclude that while the pulse oximeter is a reliable instrument for the measurement of blood oxygenation, there is a small but consistent incidence of patient-related failure with this monitoring device in the PACU.