Chemical biosensor
Sensor that produces an electrical signal proportional to the concentration of biochemical analytes. Use both chemical and physical principals in their operation.
Important critical care analytes
pH of blood
Po2; Pco2
hemotocrit
total hemoglobin
O2 saturation
electrolytes : Na, K, Ca, Cl
metabolites: glucose, lactate, creatinine, urea
these variables usually analyzed in a central clinical chemistry lab remote from the patient's bedside.
Provides only historical values of the patient's blood chemistry.
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