A transcutaneous gas sensor for application to the body surface of a patient is provided. The sensor includes a sensing electrode having an exposed surface region which, in use, is applied to the body surface of the patient with an electrolyte layer between the electrode and the patient's body. Gas which...http://www.google.com/patents/US4396017?utm_source=gb-gplus-sharePatent US4396017 - Transcutaneous gas sensor
