GASMISCHVORRICHTUNG UND IHRE VERWENDUNG IN EINEM GASANALYSEGERAET.

摘要

A gas mixing device has a substrate (31, 231) made of such as silicon and a plate having a flat smooth surface, (30, 230) made of such as glass, and bonded to the substrate. The substrate has a plurality of fine elongated grooves (8 min , 12 min , 23 min , 25 min , 208, 212, 223, 225) which are capable of combining a plurality of different gases. Each of said different gases is introduced through the respective inlet port (11, 22, 211, 222), and combined with another gas in the gas mixing device. The levels of flow resistance in branch grooves are so determined that the different gases are mixed at predetermined mixing ratio. A blood gas analyzer (100) includes the gas mixing device (29) and a measuring unit (50) equipped with a plurality of gas measuring electrodes (101, 102, 103, 104, 105, 106). The mixture gas from the gas mixing device is made to bubble through a buffer solution in a reservoir (73, 74) for producing a standard liquid for calibration. This standard liquid is fed into the measuring unit at a predetermined time interval and the measured data obtained by the measuring unit is used as calibration date.