Articles: general-anesthesia.
-
Nitrous oxide diffuses into endotracheal tube cuff and then overexpand the cuff. This causes upper airway obstruction and trauma in intubated patients during general anesthesia. On the other hand, pressure of endotracheal cuff is reported to decrease in time-related fashion under artificial ventilation with oxygen and air. ⋯ Clinically sealing pressure was 11.6 +/- 1.0 mmHg and necessary volume of air was 5.5 +/- 1.8 ml. The initial pressure of the inflated cuff gradually decreased to clinical sealing pressure during 130.9 +/- 30.5 min. In conclusion, when regurgitation should be prevented at the point of the clinically sealing pressure, pressure and volume of inflated cuff by air should be re-checked at an interval of about 2 hrs in intubated patients under general anesthesia without nitrous oxide.
-
Klin Monbl Augenheilkd · Jun 1993
[Brief narcosis with propofol/ketamine for administering retrobulbar anesthesia].
Eye surgery is performed under local anesthesia in more than 90% of the cases. While injecting the local anesthetics a deep sedation is desired. During surgery however the patient should be cooperative, such as to avoid inadvertent movements. We routinely perform local anesthesia (retrobulbar injection and van Lint block) under intravenous anesthesia with propofol (Disoprivan) and ketamine (Ketalar, Ketanest). ⋯ Using propofol and ketamine while performing the local anesthesia the patients are awake but relaxed and cooperative during surgery. This method has now been used routinely in over 1000 cases. It has proved to be clinically safe and efficient. It offers the surgeon good working conditions and is well tolerated by the patients, reducing their preoperative and perioperative anxieties.
-
Tidsskr. Nor. Laegeforen. · May 1993
Comparative Study[Sterilization of women. Waiting lists, surgical techniques and type of anesthesia].
The surgical and anaesthesiological techniques of tubal sterilization in Norway were studied by means of questionnaire. All hospitals returned the questionnaire. 94% of the operations were performed by gynaecologists, and in 99% of the cases by bipolar or endothermal laparoscopy. ⋯ There were significant regional differences in sterilization rates and waiting time. We found no simple relation between sterilization technique and waiting lists.
-
Randomized Controlled Trial Comparative Study Clinical Trial
[Acoustic evoked potentials of medium latency. Anesthesia induction with S-(+)-ketamine versus ketamine racemate].
Mid-latency auditory evoked potentials (MLAEP) reflect the primary cortical processing of auditory stimuli. They are widely suppressed during general anaesthesia with volatile anaesthetics. Under ketamine, in contrast, they seem to be preserved, which has been interpreted as indicating insufficient suppression of consciousness during ketamine anaesthesia. ⋯ MLAEP do not change in amplitude or latency during induction of general anesthesia with S-(+)-ketamine or ketamine-racemat. Primary cortical processing of auditory stimuli seems to preserved under S-(+)-ketamine and ketamine-racemat. This must be viewed in connection with dreams and hallucinations and could be interpreted as inadequate suppression of auditory information processing during general anaesthesia with S-(+)-ketamine and ketamine-racemat.