Transcutaneous blood oxygen content measuring instrument - has concentric measuring electrodes, inner electrode embedded in glass with diaphragm underneath

摘要

The instrument for measuring the oxygen content of blood transantaneously has an electrode system with a tubular silver anode (2) with a flanged top, inside which is a cylindrical glass block (4) which has a tubular cathode (3) embedded in it. These concentric elements are surrounded by a ring shaped metal casing (1) with an electrode membrane (5) stretched over the base. Between the membrane and the bottom of the concentric elements is a gap (12) for an electrolyte solution (12) contained in a ring shaped chamber (9) around the base of the elements. The metal casing in turn carries an inner ring (6) with an outer ring (8) screwed onto it. The inner ring carries a heating coil (13), and embedded in the ring is a heat sensitive (15) used for temperature control. An air channel (10) communicates with the electrolyte chamber.