Anaesthesia
-
The distance from the carina to the tip of the tracheal tube was measured with a fibreoptic bronchoscope in 21 consecutive patients undergoing elective laparoscopic cholecystectomy. After placement of an Eschmann tracheal tube with a printed intubation guide mark at the vocal cords, the distance was 28 (15) [5-54] mm (mean (SD) [range]). The tube was then repositioned so that the distance was 34 (3) [30-40] mm from tip of the tube to the carina. ⋯ The maximum distance of tube migration was 8 (4) [0-15] mm. Four out of 21 patients would have been at risk of bronchial intubation after pneumoperitoneum if the tube had not been repositioned. Placement of the tube according to the guide mark is not recommended for laparoscopic cholecystectomy.
-
The stability of propofol emulsion following the addition of various amounts of lignocaine solution was investigated. The investigations used were macroscopic and microscopic observations and electroacoustic determination of both droplet size and zeta potential. ⋯ Resultant changes are unlikely to be clinically important following the addition of less than 20 mg of lignocaine to 200 mg of propofol (20 ml of propofol emulsion). It is recommended, however, that anaesthetists consider the possibility of destabilisation of propofol emulsion when adding larger doses of lignocaine, or when there is a delay between formulation and administration of the propofol-lignocaine mixtures.
-
Letter Clinical Trial Controlled Clinical Trial
Tachypnoea following vital capacity induction with sevoflurane.