NCT04817943

Comparison of Esophageal and Tracheal Temperature in the Patients Using Breathing Circuit With Heated Wire Humidifier

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 38 (actual)
• Sponsor: Pusan National University Yangsan Hospital · Academic / Other
• Sex: All
• Age: 20 Years – 60 Years
• Healthy volunteers: —

Summary

When using a breathing circuit with heated wire humidifier, investigators will check if the temperature measured by the thermometer of the endotracheal tube is more than 0.25 degrees apart from the temperature measured by the esophageal thermometer. Through this, in the case of patients who need to use a breathing circuit with heated wire humidifier, investigators will find out whether it is appropriate to use an esophageal or endotracheal thermometer.

Detailed description

It is known that hypothermia occurs in approximately 50-90% of surgical patients under general anesthesia, and intraoperative hypothermia can lead to various complications such as wound infection, coagulation disorders, increased frequency of cardiac complications, ventricular fibrillation, prolonged effects of anesthesia drugs, shivering, and weakened immune function. Additionally, inadequate maintenance of temperature during surgery can result in delayed discharge from the recovery room, delayed recovery, and extended hospitalization. Therefore, accurate measurement of body temperature and active temperature management are crucial during surgery. Although there are various sites for temperature measurement, measuring the core body temperature in well-perfused deep tissues, which have a higher temperature and greater reliability than other sites, is essential. While esophageal temperature measurement is commonly used in patients undergoing general anesthesia, there may be cases where esophageal temperature probe cannot be inserted due to bleeding tendencies or lesions in the esophagus. In such cases, measuring temperature through the tympanic membrane or an endotracheal device becomes possible, but using a heated humidification breathing circuit for patient warming may affect the endotracheal temperature. Although there are animal study results comparing esophageal temperature and endotracheal temperature, research on the comparison of esophageal and endotracheal temperatures in humans is limited, and there is no study on the comparison of esophageal and endotracheal temperatures when using a heated humidification breathing circuit. The investigators aim to verify whether there is a temperature difference of 0.25 degrees or more between the temperature measured through the endotracheal device and the temperature measured by the esophageal thermometer when using a heated humidification breathing circuit. Through this investigation, they seek to determine which thermometer, either esophageal or endotracheal, is more appropriate to use in patients requiring the use of a heated humidification breathing circuit.

Conditions

• The Patients Who Underwent General Anesthesia

Interventions

Type	Name	Description
OTHER	Non applicable	When the patient enters the operating room, oxygen saturation, blood pressure, and electrocardiogram are monitored, and general anesthesia is induced using 1-2 mg/kg of 1% propofol. 0.8 mg/kg of rocuronium, a neuromuscular blocker, is injected intravenously, and a human endotracheal tube is intubated. A thermometer is attached to the inside of the double-layered endotracheal tube cuff, which measures the temperature in the trachea. After the endotracheal intubation is performed, the esophageal thermometer is inserted, and from this point, the temperature measured by the esophageal thermometer and the thermometer of the endotracheal tube are recorded. The temperature immediately after insertion of the esophageal thermometer is set as Tbaseline, and the temperature of the esophagus and trachea, the temperature of the operating room, and the temperature of breathing circuit with heated wire humidifier are recorded every 5 minutes from thereafter until the end of the operation.

Timeline

• Start date: 2021-04-29
• Primary completion: 2021-08-31
• Completion: 2021-08-31
• First posted: 2021-03-26
• Last updated: 2024-01-16

Locations

1 site across 1 country: South Korea