Body Temperature

Keeping a patient's body temperature normal during surgery is an important part of safe anesthetic care. When the body temperature drops below 36°C (called inadvertent perioperative hypothermia), patients face higher risks of bleeding, wound infection, heart problems, and a slower recovery. To prevent these complications, anesthesiologists monitor core body temperature continuously during surgery. Three monitoring methods are commonly used in clinical practice: (1) a nasopharyngeal probe - a small soft sensor inserted through the nose and placed at the back of the throat, which provides continuous readings and is considered the gold standard; (2) an infrared tympanic thermometer (TaiDoc TD-1261) - a handheld device that measures ear temperature in about one second; and (3) the 3M SpotOn™ sensor - a non-invasive adhesive patch placed on the forehead that continuously estimates core temperature without requiring insertion into any body cavity. Although all three methods are used interchangeably at Srinagarind Hospital, no study has directly compared all three simultaneously in the same patient to determine how well they agree with each other. If significant differences exist between methods, a clinician who switches from one device to another may unknowingly under-detect or over-estimate hypothermia. This study will enroll 92 adult patients scheduled for elective surgery under general anesthesia at Srinagarind Hospital, Khon Kaen University. All three temperature sensors will be applied at the same time, and readings will be recorded simultaneously every 15 minutes throughout the operation. The main goal is to determine whether each device gives results close enough to the nasopharyngeal probe to be safely used as an alternative. The study is observational - no medications or procedures will be added to routine care.

Moni-Patch Temperature Monitoring Patch System, a non-invasive, continuous temperature monitoring device designed to estimate core body temperature by applying a Sensor to the neck. This clinical accuracy validation study aims to verify the accuracy and repeatability of the Moni-Patch compared with an FDA-cleared continuous tympanic temperature monitoring device used as the clinical reference. Main objectives of this study are; To verify that the Moni-Patch and the reference device(tympanic) demonstrate acceptable agreement, as defined by Bland-Altman Analyses (bias within ±0.4°C and limits of agreement between -1.0°C and 1.0°C). To verify the consistency and repeatability of temperature measurements obtained from the Moni-Patch during continuous monitoring.

The vital signs (pulse, systolic and diastolic blood pressure, respiratory rate, oxygen saturation and body temperature) are critical in assessing the severity and prognosis of infections. The devices used today for measuring the vital signs have to be in physical contact with the patients. There is an apparent risk of transferring infections from one patient to the next (or to healthcare professionals). Accurately obtaining vital signs is also important when managing other categories of patients where it may be relevant to obtain some of the vital signs such as pulse and blood pressure. This project aims to evaluate a new camera-based system for contactless measurement of vital signs.

Previous studies have shown that mortality and morbidity in preterm neonates are correlated with the fall in body temperature on admission. Hypothermia can be decreased by reducing body heat losses to the environment. The investigator research hypothesis is that a new calculation of the air temperature in the incubator would promote the newborn infant weight growth from the period between birth and day 10 of life compared to cutaneous mode. The secondary hypotheses assumes a decrease in the side effects usually observed in both morbidity and mortality. A software is used to calculate the body heat loss (BHL) of each individual preterm infant, and to propose a specific air temperature setting inside the incubator to reduce BHL to zero. This software has been validated in a previous pilot study (Degorre et al. 2015). This study aims to compare the energy costs of providing incubated preterm infants born between 25 and 32 weeks of gestation with homeothermia using either specific individualized air temperature control (ATC) or skin servocontrol (SSC).