Halothane sensors

Figure 17-2 Response time relative signal change and reproducibility of a halothane sensor [118].

A carbon dioxide sensor for monitoring levels in a closed exhalation anesthesia system was developed by Jordan (23). 7,10-dioxa-3,4-diaza-l,5,12,16-hexadecatetrol was prepared by mixing monoethanolamine, often used as a CO2 scrubber, with ethylene gylcol diglycidyl ether in a 2 1 ratio and was used as a coating. The respone was 391 Hz for 10% CO2, exposure time less than 30 sec, and complete recovery in less than 60 sec. No interferences were reported from nitrous oxide, halothane, or oxygen tested at normal anesthesia concentrations. 

In the following sections some advances in the development of electrochemical sensors for gases of medical interest are discussed. These include oxygen, carbon dioxide and anaesthetic agents such as nitrous oxide, halothane and isoflurane. 

---