Journal of anesthesia
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Journal of anesthesia · Dec 1997
Effect of fentanyl on heart rate variability during mechanical ventilation.
This study was performed to investigate the effect of fentanyl alone on heart rate variability (HRV) during mechanical ventilation using power spectral analysis. Arterial baroreceptor reflex was also tested with pharmacological manipulation to assess the contribution of vagal baroreceptor reflex modulation of HRV during fentanyl anesthesia. ⋯ Our data indicate that fentanyl modulates the respiratory frequency fluctuation of HRV. This is partly caused by the effects of fentanyl on arterial baroreflex sensitivity.
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Journal of anesthesia · Dec 1997
Comparison of sensitivity of neuromuscular monitoring tests: twitch versus tetanic test.
The study was planned to compare the sensitivity of a twitch neuromuscular monitoring test, the train-of-four (TOF), with a tetanic test, double-burst stimulation (DBS), during a subclinical dose of vecuronium. ⋯ DBS is a more sensitive test than TOF to quantify the subclinical dose effect of vecuronium, and among the studied parameters (T 1, TOFr,D 1 and DBSr), DBSr, measuring tetanic fade, was the most sensitive single parameter.
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Journal of anesthesia · Dec 1997
Comparison of sprotte and Quincke needles with respect to spinal fluid leakage using artificial spinal cord.
This research investigated whether the Sprotte needle causes less leakage of CSF than the Quincke needle in the artificial spinal cord. ⋯ The Sprotte needle produces less CSF leakage than the Quincke needle.
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Journal of anesthesia · Dec 1997
Effects of hemoglobin concentration and temperature on the in vitro release of cyanide from sodium nitroprusside.
This in vitro study was performed to determine whether changes in hemoglobin (Hb) concentration and temperature influenced the amount of cyanide (CN-) released from sodium nitroprusside (SNP). ⋯ Though the Hb concentration and temperature changed the amount of CN- released from SNP in RBC, the change observed was not clinically significant.