Masui. The Japanese journal of anesthesiology
-
Case Reports
[Bronchodilator aerosol propellant interferes with an photoacoustic spectrophotometer respiratory gas analyzer].
A patient with bronchial asthma was scheduled for an operation under nitrous oxide-isoflurane anesthesia. We monitored isoflurane concentrations continuously using an anesthetic gas analyzer (BK 1304). ⋯ The BK 1304 uses infrared photoacoustic spectrophotometry and it is susceptible to interferences caused by Freon propellants in bronchodilator aerosols. We should take care in monitoring inhalational anesthetics when using aerosols containing Freon propellants.
-
We investigated the efficacy and untoward effects of low doses of propofol for intrathecal morphine-induced pruritus. Twenty gynecological and obstetric surgical patients received spinal anesthesia with 0.5% tetracaine and phenylephrine, as well as 0.2 mg morphine. Seven of them (35%) complained pruritus graded according to the treatment necessary in the postoperative period. ⋯ One patient was resistant to treatments by 20 mg of propofol and 0.1 mg of naloxone. Three patients transiently fell in sleep even after administering 10 mg of propofol. The authors conclude that low dose propofol is effective in treating intrathecal morphine-induced pruritus, although it may transiently causes hypnosis in postoperative patients.