摘要:
A respiration system and method for minimizing the oxygen concentration of inspiration gas supplied to a patient while maintaining a desired arterial oxygen partial pressure in the patient comprising a regulator for changing the oxygen concentration of inspiration gas supplied to a respirator according to a desired nominal value therefor and a sensed value therefor taken from the patient, a control device for adjusting parameters of the breathing gas in the respirator supplied to the patient while maintaining the desired arterial oxygen partial pressure, and a minimizer connected to the control device for changing a direction of the adjustment when the oxygen concentration in the inspiration gas cannot be maintained within a range between a first sensed instantaneous value for the oxygen concentration in the inspiration gas and a lower limit set for that value.
摘要:
A testing device for the partial pressure testing of gases in body fluids comprises a test electrode having a platinum wire extending through a glass tubule arranged in a synthetic tube having a tip with a cellophane layer thereon. The electrode and a counter-electrode are connected through a switch to a pulse generator for generating a control pulse and for also generating a bias voltage pulse. A transverse storage unit is also connected to the switch through a test amplifier. A logic element is connected to the transverse storage for establishing a pulse width, and it is connected through a pulse delay unit and delay circuit. The storage unit is also connected through an amplifier and comparator to a control, warning or indication device. A bias voltage is fed in a pulse to the test electrode, and a test pulse resulting from the current flow of the test electrode is converted to a transfer pulse of a width smaller than that of the test pulse, which is proportional to the amplitude section of the test pulse. The test pulse amplitudinal value is taken over by the transfer pulse and forms the input for a test and/or control circuit.