Acta anaesthesiologica Sinica
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Acta Anaesthesiol. Sin. · Jun 1994
Recovery from propofol anesthesia: a quantitative electroencephalographic analysis.
Four numerical descriptors (median frequency, spectral edge frequency-95%, total power, and delta-ratio) derived from the computer-processed electroencephalogram (Neurometrics Lifescan) were analyzed for their ability to predict imminent arousal from total intravenous anesthesia with propofol. Fifteen patients undergoing minor surgical procedures without intubation were enrolled in the study. Arousal was defined as eye opening in response to verbal stimuli. ⋯ Significant change of delta-ratio occurred 210 seconds before patients' arousal and thereafter. An increase of delta-ratio value indicates that patients shifted from anesthetic to arousal state. It is concluded that the degree of delta-ratio change may be used for predicting patients' arousal from propofol anesthesia.
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Acta Anaesthesiol. Sin. · Jun 1994
Experience of epidural blood patch for post-dural puncture headache.
Post-dural puncture headache is a common outcome following either spinal or epidural anesthesia. Cases were collected within five years' period (1988-1992) in Keelung Chang Gung Memorial Hospital. Those cases with relief of post-dural puncture headache after conservative treatment were excluded. ⋯ Effective rate was 98.15% upon single blood patch. Repeated blood patch was done in 3 cases. No complication was noted.
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Acta Anaesthesiol. Sin. · Jun 1994
The hemodynamic effects of continuous intravenous infusion of propofol at higher rates.
The new formula of propofol was introduced in 1985. Because of its characteristics of rapid onset and elimination, it was often used as a drug of induction and maintenance of total intravenous anesthesia. However, the hemodynamic effects of propofol was still controversial. ⋯ The infusion rates of propofol were 10 mg/kg/hr during the first 30 minutes and 8 mg/kg/hr during the following 30 minutes, norcuron, 0.1 mg/kg initially and 1 mg for maintenance after 30 minutes. Normal saline was infused 1000 to 1500 ml in study period to maintain higher preload. Post induction hemodynamic data were collected at the 5th, 15th, 30th, 60th min after induction.(ABSTRACT TRUNCATED AT 250 WORDS)
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Acta Anaesthesiol. Sin. · Mar 1994
Randomized Controlled Trial Clinical TrialThe effect of heated humidifier in the prevention of intra-operative hypothermia.
Unintentional hypothermia is common in patients undergoing "routine anesthesia in surgery". The aims of the study were to estimate the difference of changes of body temperature during abdominal and limb operations and to evaluate the effectiveness of the heated humidifier for reducing intraoperative heat loss. Forty-three patients were randomly being allocated into 3 groups. ⋯ Warming and humidifying the inspired gas effectively reduced the heat loss. We concluded that abdominal operation induce hypothermia more than limb operation. The use of heated humidifier was effective in maintaining body temperature.
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Acta Anaesthesiol. Sin. · Mar 1994
Randomized Controlled Trial Clinical TrialEffects of magnesium sulfate pretreatment on succinylcholine-facilitated tracheal intubation.
Magnesium sulfate may prevent increase in serum potassium produced by succinylcholine and cause transient hypotension. The present study was designed to evaluate the effect of magnesium sulfate on heart rate, blood pressure and hyperkalemic response following succinylcholine injection during tracheal intubation. Twenty patients, ASA class I-II, scheduled for elective surgery were equally and randomly allocated to two groups. ⋯ Heart rate, blood pressure, venous and arterial potassium levels were measured at 1, 3, 5 and 10 minutes after intubation. The results showed that magnesium sulfate could attenuate the hypertensive response at 1 minute and the hyperkalemic response at 1 and 3 minutes following succinylcholine-facilitated intubation; the tachycardiac response at 1 minute after intubation could not be reduced by this agent. We concluded that bolus infusion of magnesium sulfate may be of help in reducing the hypertensive response during laryngoscopy and intubation.