Pilot Study of the Genius(TM)2 Tympanic Thermometer in Cardiac Patients Requiring Cardiopulmonary Bypass

Inclusion Criteria: * Male or female adult subjects greater than/equal to 18 years of age providing signed informed consent * Febrile or afebrile * Planned monitoring of core temperature at a minimum of two separate sites, one of which includes the pulmonary artery * Planned use of cardiopulmonary bypass for a cardiac surgical procedure. Exclusion Criteria: * Mist tents or oxygen hoods * Hot or cold applications to the head * Patients that have the planned use of deep hypothermic circulatory arrest * Aural anomalies (e.g., external auditory canal less than 2cm in length, persistent ear pain) * Any other major anomaly, surgery or medical condition precluding participation according to manufacturers' stated exclusions or in the opinion of the principal investigator * Blood, cerumen, excessive hair, inflammation, infection, ulceration or foreign object in the ear observed by otoscopic examination * Any other signs or symptoms of distress or a condition which would, or in the opinion of the principal investigator, render their participation in the study detrimental to their well-being. * Previous refusal or enrollment in this study * Previous or concurrent participation in a clinical trial of a drug or device within the past 30 days.