| 摘要 |
Contaminated air in general anaesthesia is extracted via a hemispherical hood (1) located closely over the patient. The hood (1), which is of a thin-wall transparent-shell form, is mounted for hand-touch variation of its orientation on an arm (2) which is carried by a telescopic column (3) that allows for height adjustment. The arm (2) extends from a unit (18) that allows the hood (1) to be swung horizontally about the column (3), and gas is drawn from the hood (1) near its open mouth (6) via a low-down port (7) (Figs 3 to 5) that is coupled through the arm (2) and column (3) to a fan unit (4). Relief (23) of the bottom margin of the hood (1) may be used to enhance access to the patient, and for manoeuvrability the column (3) is trolley-mounted or adjustable laterally on a fixed track (35) (Figs 9 and 10). |
