AccuTemp Sensor: Radiometry based non-invasive continuous core body temperature monitoring for patients undergoing prolonged anesthesia and critically ill patients.

DESCRIPTION provided by applicant There is a growing need for accurate and continuous non invasive monitoring of brain temperature in hospitals and clinics throughout the world The need for physicians and anesthesiologists to know the brain as well as the core body temperature of a patient is well established Temperature management of patients under anesthesia during cardio pulmonary bypass surgery is imperative to a positive outcome and ongoing patient quality of care yet there is no non invasive accurate measurement device available to physicians Current practice guidelines for anesthesiologists intensive care physicians neonatologists and emergency physicians require the monitoring of the core brain temperature However there are no devices that provide immediate accurate data Devices that are non invasive only measure superficial temperatures insufficient for critical situations Invasive monitors are placed into the bladder rectum esophagus or the nasopharynx to measure core temperature more accurately but the medical professional must then infer the most important temperature brain temperature with the hope that this is andquot accurate enoughandquot for critical medical decisions during surgical operations and difficult intensive care unit stays Thee are several devices that attempt to measure brain temperature The most accurate prediction of brain temperature today uses intravascular sensors in the pulmonary artery or jugular vein but these are invasive inconvenient and potentially harmful Even sensors directly in the brain have shown that when hypothermia is induced and reversed rapidly standard monitoring sites fail to reflect cerebral temperature With success in kidney and bladder temperature detection and monitoring Thermimage is now developing the AccuTempandquot Sensor a non invasive radiometric based system to accurately and rapidly measure the core brain temperature cm deep This system consists of a andgt cm diameter receiving microwave antenna placed on the patientandapos s forehead and a specialized radiometer to amplify and process the antenna signal to determine the actual brain temperature The device detects the energy emitted from the brain at low frequencies with a sensitive receiver that detects signal strength of only a billionth of a watt There is a clear need for a new non invasive temperature measurement device that provides fast and accurate readings of the bodyandapos s most sensitive tissue the brain This Phase II SBIR research and development will demonstrate the noninvasive sensing technology successfully prepared in Phase I provides reliable monitoring of deep core brain temperature during hypothermic surgery and the cutting edge radiometer prototype built in Phase I can be translated into a low cost system that combines technological innovation with universal commercial appeal and clinical validation PUBLIC HEALTH RELEVANCE The proposed work is relevant to public health because the clinical implementation of a low cost microwave device that safely and noninvasively measures deep tissue temperature is expected to significantly expand diagnostic capabilities for a wide range of clinical applications involving thermal regulation within the body starting with improved control of patients during hypothermic cardiac surgery or with traumatic brain injury The project has direct relevance to NIHandapos s mission of working toward improved health care at lower cost by providing a powerful yet affordable diagnostic tool to help avoid complications that occur following routine surgical procedures or care of critically ill patients