| abstract |
The invention relates to a device (20) for determining the duration of consumption of a gas by a patient comprising an internal gas passage (25) with a gas inlet (21) and a gas outlet (22), adjusting means (23) for setting a desired gas consumption time (T fixed), display means (24) for displaying at least the desired gas consumption duration (T fixed), determination means of gas consumption time (5, 6) designed to measure the total duration (Tconso) of gas consumption during which gas flows in said internal gas passage (25), from the gas inlet (21) to the gas outlet (22), information processing means (9) adapted to and designed to compare the total gas consumption time (Tconso) determined by the gas consumption time determining means (5, 6). the desired gas consumption time (Tfixed), and flow interruption means con to interrupt any flow of gas in said gas passage when the information processing means determine that the total duration (Tconso) of gas consumption is greater than or equal to the desired gas consumption time (T fixed). |