Effect of Forced-air Warming and Circulating-water Mattress in Preventing Heat Loss During Vascular Surgery

Study Overview
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Brief Summary
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The purpose of this study is to determine whether a custom-made forced-air warming mattress can prevent heat loss in patients undergoing vascular surgery better than a circulating-water mattress

Detailed Description
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A reusable, custom-made forced-air warming mattress was made of a light to medium weight water resistant canvas, sewn like mattress with 2 arms placed underneath the patient. An open hole at proximal part of one arm was designed to attach with a hose of warm air delivery device. Small holes (2-3 mm2), 5 inches apart were punched on the upper surface of this mattress around the patient except for the area underneath the patient that the holes were 9 inches apart. The weight of the patient will obstruct the air flow and prevent direct blowing of warm air onto the underside of patients. There is a special appendage connected to the upper part of mattress which can connect warm air to cover the patient's chest. There is a special appendage connected to the upper part of mattress which can convect warm air to cover the patient's chest. The mattress is 97 inches x 97 inches, with 2 arms of 25 inches x 16 inches and a special appendage of 45 inches x 12 inches for covering the chest with warm air delivery. This size is proper for patient of 170 cm. height. In order to reuse it, the mattress can be washed, dried and sterilized by gas or autoclaved for more than 50 times. A sterile sheet well enhance the sterile environment of the operating field.

Official Title
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Effect of Forced-air Warming and Circulating-water Mattress in Preventing Heat Loss During Vascular Surgery

Conditions
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Hypothermia, Vascular Surgery, Forced-air Warming Mattress, Circulating-water Mattress

Intervention / Treatment
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* Device: warming device (a reusable, custom-made forced- air warming mattress)


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients undergoing vascular surgery Exclusion Criteria: Preoperative fever

Ages Eligible for Study
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Minimum Age: 20 Years
Maximum Age: 85 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: 1<br>warming by circulating-water mattress | Device: warming device (a reusable, custom-made forced- air warming mattress)<br>* 2=forced-air warming mattress 1=circulating-water mattress<br>|
| No Intervention: 2<br>Forced-air warming mattress | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| skin and nasopharyngeal temperature |  | 180 min | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| burn wound |  | 3 days | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Hypothermia, Vascular surgery, Forced-air warming mattress, Circulating-water mattress