Abstract: A sensor (1) for detection of gas, in particular for detection of CO2. The sensor (1) has a contact face (2) which is directed towards a measuring site. The sensor (1) includes at least one radiation source (3), a measurement volume (4) for receiving the gas to be measured, and at least a first detector (5) for detection of radiation transmitted from the source (3) to the first detector (5) through the measurement volume (4). The sensor has a path (6) of the radiation between radiation source (3) and first detector (5). The radiation propagates along the path in a non-imaging way.

Abstract: A sensor (1) for detection of gas, in particular for detection of CO2. The sensor (1) has a contact face (2) which can be directed towards a measuring site. The sensor (1) includes at least one radiation source (3), a measurement volume (4) for receiving the gas to be measured, and at least a first detector (5) for detection of radiation transmitted from the source (3) to the first detector (5) through the measurement volume (4). The sensor has a path (6) of the radiation between radiation source (3) and first detector (5). The radiation propagates along the path in a non-imaging way.

Abstract: A device for applying a sensor to a measurement site on a patient's skin has a wall arrangement defining an applicator volume above the patient's skin. The wall arrangement has a patient's side and a sensor side. At least one gas-permeable membrane separates the applicator volume into a first volume directed to the measuring site at the patient's side of the wall arrangement and a second volume separated from the patient's skin and directed to the sensor side of the wall arrangement.

Abstract: A device for applying a sensor to a measurement site on a patient's skin has a wall arrangement defining an applicator volume above the patient's skin The wall arrangement has a patient's side and a sensor side. At least one gas-permeable membrane separates the applicator volume into a first volume directed to the measuring site at the patient's side of the wall arrangement and a second volume separated from the patient's skin and directed to the sensor side of the wall arrangement.

Abstract: A system for controlling administration of a respiratory depressant drug or mixture of drugs to a spontaneously breathing patient comprises a drug delivery unit (3), being adapted for indexed or continuous and automatic titration of a respiratory depressant drug or mixture of such drugs to said patient (1), and a control apparatus (6), receiving measurement signals (20) relative to the respiratory state of said patient (1) and issuing control signals (27) to said drug delivery unit (3), wherein the control apparatus is adapted to keep said measurement signals relative to the respiratory state to a predetermined condition and thereby providing adequate sedation and/or analgesia to said patient.