The Effect of Preoperative Warming on Postoperative Hypothermia

Study Overview
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Brief Summary
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36 patients American society of anesthesiology (ASA) physical status I,II and III undergoing general anesthesia for elective transurethral resection of the prostate (TUR-P) surgery will be included in the study. Patients will be randomized into two groups; first group(control group) and second group (forced-air warming). Resistive heating will start when patients are transferred to the operating room table; forced-air warming will start before preoperative 30 minute.

Detailed Description
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The primary aim of this study was to compare the effect of prewarming on perioperative hypothermia in elderly patients undergoing TURP under general anesthesia. In addition, we aimed to evaluate the effects of prewarming on hemodynamic variables, PACU output time, tremor, patient comfort and satisfaction. The investigators plan to enroll 36 patients in 2 groups. Body temperature will be measured at the core temperature, hemodynamic variables. Shivering will be graded by visual inspection. Thermal discomfort scale, patient satisfaction will be evaluated. The investigators hypothesize will decrease the forced air prewarming incidence of perioperative hypothermia.

Official Title
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The Effect of Preoperative Warming on Postoperative Hypothermia in TURP Surgery

Conditions
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Preventing Hypothermia, Perioperative Hypothermia

Intervention / Treatment
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* Other: forced air warming group
* Other: control group


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients aged 50-85 years undergoing general anesthesia for TURP surgery ASA physical status I and III patients Body mass index between 15 and 36 kg/m2 General anesthesia time is 30-90 minutes Exclusion Criteria: without written consent, inadequate Turkish comprehension, known impaired thermoregulation or thyroid disorders, severe hypertension (systolic blood pressure [SBP]>180 mmHg or diastolic blood pressure [DBP] > 110 mmHg in the operating suite admission), an angiotensin-converting enzyme inhibitor/angiotensin II receptor antagonist on the day of surgery, secondary hypertension (e.g., renal artery stenosis, pheochromocytoma, Cushing's syndrome), vascular disease, poor cutaneous perfusion, serious skin lesions baseline temperature ≥37.5°C (degrees centigrade)

Ages Eligible for Study
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Minimum Age: 50 Years
Maximum Age: 85 Years

Sexes Eligible for Study
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Male

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: Supportive Care
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: forced air warming group<br>30 minutes before the preoperative will use forced air warming. | Other: forced air warming group<br>* 30 minutes before the preoperative will use forced air warming<br>Other: control group<br>* do not heating group<br>|
| No Intervention: control group<br>do not active heating group | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Perioperative measurements of core temperature (centigrade ° C) | After the operation patients will be admitted to the PACU. Here, body temperature will be assessed and the incidence of hypothermic patients (body temperature < 36°C)will be measured. | 2-3 hours | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Evaluation of hemodynamic variables (arterial blood pressure) | systolic blood pressure (SBP) in mmHg, diastolic blood pressure (DBP) in mmHg, mean arterial pressure (MAP) in mmHg will be measured. | 2-3 hours | 
| Evaluation of hemodynamic variables (heart rate) | heart rate (HR) in beats per minute will be measured. | 2-3 hours | 
| Number of patients with postoperative shivering | After the operation patients will be admitted to the PACU. Here, postoperative shivering will be measured and graded by visual inspection. | 2-3 hours | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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forced-air, hypothermia, TUR-P surgery, core temperatures, prewarming, general anaesthesia