The effects of anesthetic technique and ambient temperature on thermoregulation in lower extremity surgery

Phase 4

Completed

• Conditions: anesthesia; thermoregulation; Anaesthesiology - Anaesthetics

• Registration Number: ACTRN12612000812897
• Lead Sponsor: Ayse Belin OZER

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Study Start: 2012-08-02
• Last Update Posted: 13 January 2020

Recruitment & Eligibility

• Status: Completed
• Sex: Male
• Target Recruitment: 90

Inclusion Criteria

The study was included 90 male patients aged between 18-60 years whose physical status was in the American Society of Anesthesiologists (ASA) I-II risk group and were scheduled for lower extremity surgery. In all cases, to avoid errors in body temperature measurements arising from the diurnal rhythm, body temperature measurements were taken in the morning between 08:30 and 13:00 hours.

Exclusion Criteria

Patients with inflammatory diseases, diabetes mellitus, muscle disease, hypo/hyperthyroidism, cardiac, hepatic and renal diseases, Parkinson disease, Reynold syndrome, a history of using drugs that are known to affect body temperature (Beta-blockers, calcium channel blockers, clonidine, steroids, anti-epileptic, non-steroidal anti-inflammatory drugs, benzodiazepine), vertebral column anatomical disorder, bleeding diathesis, anticoagulant use, infection at the region of procedure, neurological deficits, drug and alcohol addiction, obesity, and those with allergies to local anesthetics were excluded from the study. In addition, patients whose surgery was shorter than 60 minutes and longer than 180 minutes and those surgeries where a tourniquet was used were also excluded from the study. Patients having a greater than 30% change in hemodynamic parameters during the surgery, those who needed to use a vasopressor or vasodilator, and those who required a blood transfusion were excluded from the study as well.

Study & Design

• Study Type: Interventional
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
tympanic temperature<br>(tympanic temperature measured via infrared thermometer)[before anesthesia induction, in 5-minute intervals after the induction of anesthesia, and in arrival to PACU];mean skin temperature [0.3 (Tchest+Tarm) + 0.2 (Tthigh+Tcalf)] <br>(peripheral temperatures measured via anesthesia machine thermometers)[before anesthesia induction, in 5-minute intervals after the induction of anesthesia];mean body temperature [0.64 x Tcentral + 0.36 x Tskin]<br>(tympanic temperature measured via infrared thermometer, but peripheral temperatures measured via anesthesia machine thermometers)[before anesthesia induction, in 5-minute intervals after the induction of anesthesia]

Secondary Outcome Measures

Name	Time	Method
Shivering score (0: no shivering, 1: presence of one or more of such findings as piloerection, peripheral vasoconstriction, and peripheral cyanosis without muscle movement, 2: presence of muscle activity observable in single muscle group, 3: presence of muscle activity in more than one muscle group, 4: presence of significant muscle activity observed in the whole body)[before anesthesia induction, in 5-minute intervals after the induction of anesthesia]