Electrode cell assembly for the continuous determination of ion concentrations in living tissues

Claim 1

An electrode cell assembly for the continuous determination of ion concentration in living tissues, said assembly comprising a measuring electrode including a hollow glass electrode, a steel tube surrounding said electrode, said electrode having a conical end projecting freely from said steel tube, said conical end being of low electrical resistance and constituted as an ion sensitive membrane, an internal reference electrode mounted axially in said glass electrode, a buffer solution in said hollow glass electrode, said reference electrode being immersed in said buffer solution, a housing surrounding said glass electrode and integrated therewith to define an annular chamber, an electrolyte in said annular chamber, a reference electrode in said annular chamber and inserted into said electrolyte, said housing merging with said conical end of the hollow glass electrode, membrane means supported by said housing in the region where the latter merges with the conical end of the glass electrode for contact with the living tissue when the conical end is brought into operative association with the living tissue, and anchoring means coupled to said steel tube and surrounding said reference electrode for retaining the measuring electrode in operative association with the living tissue.