Abstract: A process and system are provided for clearing modes of operation of a medical engineering device, especially modes of operation on a respirator (1), such as IMV (Intermittent Mandatory Ventilation, CPAP (Continuous Positive Airway Pressure) or HFV (High-Frequency Ventilation). The clearing is performed with an external electronic, optical or magnetic storage medium, e.g., a chip card (2), on which data that determine the available modes of operation and optionally the duration of their availability are present. The data on the chip card (2) are read by a writing and reading unit (3) of the respirator (1). The data may be coded, the duration of availability of a mode of respiration may be controlled by keeping a time log (9) on the chip card, and the corresponding time periods are debited from the time log (9) each time a certain mode of operation is used.

Abstract: A respirator with a tidal volume-measuring device (6) between a respiration bag (8) and a patient adapter (2) provides accurate metering of the tidal volume. The device includes a first pressure-measuring device (4) and a breathing gas interruptor (5) in series sequence between the patient adapter (2) and the tidal volume-measuring device (6). A second pressure-measuring device (7) is provided between the tidal volume-measuring device (6) and the respiration bag (8). A control unit (20) is connected with the tidal volume-measuring device (6) and the pressure-measuring devices (4, 7) and sends control signals in such a way that when a predetermined tidal volume is reached, the breathing gas interrupter (5) is switched to the closed position, and that the closed position is eliminated when the pressure p2 measured with the second pressure-measuring means (7) has dropped below the pressure p1 determined with the first pressure-measuring means (4).

Abstract: A process and system are provided for clearing modes of operation of a medical engineering device, especially modes of operation on a respirator (1), such as IMV (Intermittent Mandatory Ventilation, CPAP (Continuous Positive Airway Pressure) or HFV (High-Frequency Ventilation). The clearing is performed with an external electronic, optical or magnetic storage medium, e.g., a chip card (2), on which data that determine the available modes of operation and optionally the duration of their availability are present. The data on the chip card (2) are read by a writing and reading unit (3) of the respirator (1). The data may be coded, the duration of availability of a mode of respiration may be controlled by keeping a time log (9) on the chip card, and the corresponding time periods are debited from the time log (9) each time a certain mode of operation is used.