Correlation Between Core Temperature and Skin Temperature Measured by 3M SpotOn

Study Overview
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Brief Summary
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Core temperature should be monitored under general anesthesia. Recently developed 3M Spoton skin temeprature which is applied on temporal artery is correlated with core temperature measure by esophageal prove in several studies. Conventional skin temperature over carotid artery is also correlated with core temperature in several studies. The purpose of this study is comparing 3 methods of temperature monitoring. First, conventional core temperature measure by esophageal stethoscope. Second, 3M Spoton applying on temporal artery. Third, 3M Spoton applying on carotid artery

Detailed Description
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Core temperature should be monitored under general anesthesia. Because patients are prone to hypothermia during surgery. Conventional core temperature is monitored at esophagus, rectum, nasopharynx. But some of them are invasive and impossible in sometimes. Recently developed 3M Spoton skin temeprature which is applied on temporal artery is correlated with core temperature measured by esophageal prove in several studies. Its mechanism is making zero heat flux on skin applied. But it also cannot apply in head or facial surgery. Other studies showed conventional skin temperature over carotid artery is also correlated with core temperature. The investigators hypothesized using Spoton on carotid artery could be alternative method measuring core temperature. The purpose of this study is comparing 3 methods of temperature monitoring. First, conventional core temperature measure by esophageal stethoscope. Second, 3M Spoton applying on temporal artery. Third, 3M Spoton applying on carotid artery

Official Title
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Correlation Between Core Temperature and Skin Temperature Measured by 3M SpotOn

Conditions
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Temperature, General Anesthesia

Intervention / Treatment
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* Other: Esophagus temperature monitoring
* Other: Spoton Temporal
* Other: Spoton Carotid


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age 19 60 years old Who need surgery more than 2 hours under general anesthesia American Society of Anesthesiologists physical status 1 or 2 Exclusion Criteria: Body mass index < 35 Head and neck surgery Patients with fever > 38'C History of malignant hyperthermia

Ages Eligible for Study
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Minimum Age: 19 Years
Maximum Age: 60 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Group 1<br>Participants' temperature measured at 3 places at the same time Esophagus Skin near to temporal artery Skin near to carotid artery | Other: Esophagus temperature monitoring<br>* Measuring core temperature by esophageal stethoscope<br>* Other names: Core temperature;Other: Spoton Temporal<br>* Mesuring temperature on skin near to temporal artery using Spoton<br>* Other names: Mesuring temperature on skin near to temporal artery;Other: Spoton Carotid<br>* Mesuring temperature on skin near to carotidl artery using Spoton<br>* Other names: Mesuring temperature on skin near to carotid artery;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Esophageal core temperature measured by stethoscope ℃ | Temperature measured by esophageal stethoscope, ℃ | 3 hours (during general anesthesia) | 
| Carotid skin temperature by SpotOn, ℃ | Temperature measured by SpotOn near to carotid artery, ℃ | 3 hours (during general anesthesia) | 
| Temporal skin temperature by SpotOn, ℃ | Temperature measured by SpotOn near to temporal artery, ℃ | 3 hours (during general anesthesia) | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Room temperature, ℃ | Operating room temperature, ℃ | 3 hours (during general anesthesia) |