Comparison of Intravenous Propofol and Midazolam Anesthesia for Outpatient Cystoscopy / 대한마취과학회지

BACKGROUND: Ambulatory surgery has become popular because patients believe it allows them greater control over their business and personal lives and because third party payers find it reduces cost. This study was designed to compare the characteristics of induction and recovery as well as the safety of propofol with those of midazolam used for intravenous anesthesia in outpatient cystoscopy. METHODS: 56 healthy consenting outpatients were randomly assigned to receive either bolus of propofol (2 mg/kg, n=29) or midazolam (0.1 mg/kg, n=27) for anesthesia in outpatients cystoscopic procedure. All patients also received bolus of fentanyl 1ug/kg before induction and N-M blocking agent was not injected for maintenance of spontaneous respiration. Mean arterial pressure, HR and SpO2 were recorded and induction time (time to spontaneous eye closure), recovery time (time to response, time to orientation, time to ambulation) and adverse effects were evaluated. RESULTS: The results were as follows; 1) Both propofol and midazolam produced smooth induction, but caused significant respiratory depression. 2) The time of induction and postoperative recovery (time to ambulation) was faster in propofol than in midazolam. 3) There were less postoperative side effects (nausea, vomiting, dizziness) in propofol than in midazolam. 4) There were more cardiovascular depression in propofol than in midazolam. CONCLUSION: These results suggest 1) that propofol has significant advantage over midazolam in outpatient surgery, where early ambulation and discharge is desirable and 2) that both propofol and midazolam should be administered by expert anesthesiologist only when ventilatory assistant device with oxygen is immediately available.

A Case of Transfusion Complication under General Anesthesis / 대한마취과학회지

Transfusion complications include ABO/Rh incompatibility, sepsis, febrile reaction, immunosuppression, and viral transmission. We experienced a case of anaphylactic reaction in a 40-year-old male scheduled for laminectomy. Anesthesia was induced by intravenous (I.V.) thiopental sodium and maintained with enflurane / N2O / oxygen. Vital signs were stable until 2 hours into surgery, when patient developed sudden profound hypotension (systolic pressure 60 mmHg) with tachycardia, skin flushing and bronchial wheezing shortly after infusion of only a few milliliters of 4th unit of whole blood. Blood transfusion was immediately stopped, anesthetic agents were discontinued, and 100% oxygen was administered. Rapid administration of I.V. fluids was begun and I.V. hydrocortisone along with pheniramine were administered. Patient was successfully treated and eventually discharged from the hospital. In conclusion, besides hemolytic transfusion reaction, anaphylactic transfusion reaction may cause severe hypotension. One should be aware of the potential for adverse effects including anaphylaxis, should recognize them immediately and treat them appropriately.