British journal of anaesthesia
-
The motivation for this study was the current difficulty in estimating the total age-related MAC for a patient in a clinical setting. ⋯ The iso-MAC charts show clearly how patient age can be used to guide the choice of end-expired agent concentration. They also allow a consistent total MAC to be maintained when changing the inspired nitrous oxide concentration, thereby reducing the chance of inadvertent awareness, particularly at the extremes of age.
-
We report a case of awareness detected by the Alaris AEP Monitor, a device that measures anaesthesia by tracking changes of the waveform of the mid-latency auditory evoked potential.
-
Inadvertent endobronchial intubation occurred twice during laparoscopic surgery, with two different causes. Radiography was the only means of definitive diagnosis.
-
Cardioventilatory coupling is the triggering of inspiratory onset by preceding cardiac activity. We have observed two forms of coupling with a bimodal ('quantal') variation of respiratory period. ⋯ Cross correlation analysis suggested that when pattern III was present, TI was dependent upon the preceding TE, which differs markedly from traditional views on the interaction between inspiratory and expiratory duration. VT was linearly related to TI, and so could also be determined by the preceding TE during this type of coupling.