Optical sensor for transcutaneous CO₂ measurement: Design principle and feasibility study

Prototype of the monitor was developed for measuring tcP_CO(2) based on infrared spectrophotometric technique. The measuring prototype consisted of PbSe infrared optical sensor for transcutaneous CO₂ measurements, IR fiber and tcP_CO(2) analyzer. We conclude that the use of an optical CO₂ sensor for the monitoring of cutaneous blood gas continuously and non-invasively appear as possible. Its measuring performance is better than the commercial cutaneous blood gas monitor designed on electro-chemical basis. Monitoring of P_CO(2) by a new skin surface sensor has found to be of aid in several clinical situation such as critical care of adults/newborns, surgical operation and exercise testing. Continued clinical studies and increased experience with the method of cutaneous blood gas monitor should lead to further valuable applications.