BIOLOGICAL FLUID MEASURING DEVICE

摘要

A biological fluid measuring device for determining the presence and the amounts of substances in a biological fluid without the need for dilution of the fluid comprises a main housing including electronic circuit means and at least one electrode, and a cartridge having a membrane. The cartridge is removably mounted on the housing and the membrane is maintained operably associated by osmotic pressure with the electrode. The cartridge also includes means for protecting the membrane when the device is not in use. An enzyme electrode is also disclosed comprising a multilayered homogeneous monolithic membrane and an intermediate water-swellable coating.