Acta anaesthesiologica Sinica
-
Acta Anaesthesiol. Sin. · Jun 2001
Randomized Controlled Trial Clinical TrialLow dose fentanyl and propofol improve the speed and quality of tidal-breathing induction techniques in sevoflurane anesthesia for adults.
The objective of this study was to investigate whether low dose fentanyl, with or without low dose propofol, as pretreatment agent/s is capable of speeding up and improving the quality of laryngeal mask airway (LMA) insertion in tidal-breathing induction technique with high-concentration sevoflurane. ⋯ The results of this study of LMA insertion, for ASA I or II adult patients undergoing the tidal-breathing technique with 8% sevoflurane, suggest that pretreatment with 1 microgram/kg fentanyl plus 0.5 mg/kg propofol is superior in comparison with either pretreatment with 1 microgram/kg fentanyl or absence of pretreatment.
-
Acta Anaesthesiol. Sin. · Jun 2001
Randomized Controlled Trial Clinical TrialOxygen in nitrogen versus nitrous oxide during pediatric general anesthesia.
Induction of anesthesia decreases lung volumes, giving areas of non-ventilated lung. Nitrogen is a slowly-absorbed gas that could prevent resorption of gases from these closed spaces, preventing atelectasis and improving oxygen saturations during recovery. ⋯ The intra-operative use of air versus nitrous oxide has no substantial effect on oxygen saturations during emergence from anesthesia in children. These results are consistent with a recently published mathematical model.
-
Acta Anaesthesiol. Sin. · Jun 2001
Case ReportsFacilitation of fiberoptic nasotracheal intubation by simultaneous direct laryngoscopy in anesthetized patients.
Two cases of unexpected difficult intubation during induction of general anesthesia were reported. The first case, a 68-year-old male was scheduled for coronary artery bypass surgery. The second case, a 94-year-old male with senile dementia was arranged for exploratory laparotomy. ⋯ In these two cases oral tracheal intubation with laryngoscope was unsuccessful. Assisted ventilation could be maintained via a face mask. With the help of direct laryngoscopy, fiberoptic bronchoscope-aided nasotracheal intubation was successfully achieved.
-
Acta Anaesthesiol. Sin. · Jun 2001
Comparative StudyHemodynamic changes caused by venous gas embolism in dogs: comparisons among air, carbon dioxide and oxygen.
The volume of a bulky venous air emboli (VAE) can be estimated based on the calibration curve generated by injections of minute amount of air into the right atrium (RA) of dogs. We speculated that in patients similar VAE calibration curves could be generated using CO2 injections. As part of pre-clinical evaluation of the usefulness of CO2 injection, the present study was designed to determine whether injection of CO2 into the RA would cause less hemodynamic changes in dogs as compared with that of air or O2. ⋯ Injections of CO2 in increasing volumes into the RA of dogs caused less hemodynamic changes in comparison with that of air and O2.