Radiometer A/s

Ebbe Johansen

Finn C Lundsgaard

The invention relates to a method and apparatus for measuring one or more data of blood samples, such as oxygen saturation, contents of hemoglobin, bicarbonate, sodium, potassium, etc. involving hemolyzation of the blood sample. The blood sample is passed into a conduit and hemolyzed therein by imparting ultra-sonic waves to all parts defining said conduits. Measurement is performed after and possibly also prior to hemolyzation. In its preferred embodiment the apparatus according to the invention comprises a computer for automatically controlling the operational sequence of the components of the apparatus and for receiving measuring signals from measuring devices of the apparatus and converting said signals into immediately understandable digital data.

Method and apparatus for measuring one or more constituents of a blood

The invention relates to a method for collecting a blood sample from a blood vessel, such as an artery, by means of a syringe, preferably of the type having a piston displaceably mounted within a cylinder which is provided with a hollow needle. Before the needle is inserted in the blood vessel from which the blood sample is to be collected the piston is displaced to a retracted position, and the cylinder space defined by the piston is vented to the atmosphere. The invention also relates to a blood sampling syringe having means for venting the cylinder space to the atmosphere in a retracted position of the syringe piston.

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Birkerød, Denmark

Ebbe Johansen