C5PREOPERATIVE WARMING DEVICES

StudyParticipantsInterventions
Camus 1995
Trial held in France
Funding: mallinckrodt products donated thermocouples
Perioperative phase: preoperative; surgery type: elective; surgical speciality: abdominal surgery duration: not stated
Anaesthesia type: general; anaesthesia duration: more than 1h; premedication: oral hydroxyzine 100 mg one hr prior to surgery
All patients; ASA grade: I–II
Age (range): 44; gender (m/f): 5:11; BMI: not stated
comorbidities: not stated; preoperative ambient temperature was significantly higher in the prewarmed group than control group; intraoperative temperature was not significantly different between the groups; IV fluid: infused at ambient temperature and same volume used for both groups; gas flow: 2 l/min
  1. Forced air warming (Bair Hugger model 500) and a cotton sheet placed over the forced-air warming cover (active + passive); duration: 60 min (1); temperature setting at 41°C; intervention body area covered: covered up to the shoulders; proportion covered ≥ 50% treated; n=8
  2. Wool blanket (usual treatment); duration: not stated; control body area covered: not stated; proportion covered not stated; n=8
Fossum 2001
Trial held in USA
Funding: augustine medical-equipment & financial support
Perioperative phase: preoperative; surgery type: not stated; surgical speciality: mixed; surgery duration: not stated
Anaesthesia type: general; anaesthesia duration: more than 1h; premedication: not stated

ASA grade: mixed
Age (range): 45.23 years; gender (m/f): 57:43; BMI: not stated
comorbidities: not stated; patients with hypoth yearsoidism
  1. Forced warm air(Bair hugger model # 505) and warmed single layer cotton blanket (active warming device); duration: 45 min; temperature at 38 (3)°C; intervention body area covered: not stated; proportion covered not stated; n=50
  2. Single cotton sheet warmed in a continental metal products blanket warmer(model#sw1ae-24) (active warming device); duration: 45 min; warmed at 66° Control body area covered: not stated; proportion covered not stated; n=50
Just 1993
Trial held in USA
Funding: not stated
Perioperative phase: preoperative; surgery type: elective; surgical speciality: orthopaedics; surgery duration: over 3 h
Anaesthesia type: general; anaesthesia duration: not stated; premedication: flunitrazepam (1 mg) orally 1 hr prior
ASA grade: I–II
Age (range): 64 (60–68 years); gender (m/f): 8:8; BMI: not stated
comorbidities: not stated;
Ambient temperature: 21–23°C; or temperature: 21–22°C; gas flow of 2 l/min
  1. Electric blanket (cm-an 220, chromex) + sheet (warmed) (active warming device); duration: 90 min; 42–43°C; intervention body area covered: during surgery shoulders and thorax covered; proportion covered not stated; n=8
  2. Paper shirt covered with cotton sheet (passive warming device); duration: until during surgery; not stated control body area covered: during surgery-covered shoulders and thorax; proportion covered not stated; n= 8
Melling 2001
Trial held in UK
Funding: smith & nephew foundation; augustine medical inc
Perioperative phase: preoperative; surgery type: elective; surgical speciality: mixed; surgery duration: 1 to 3 h
Anaesthesia type: not stated/unclear; anaesthesia duration: not stated; premedication: not stated
ASA grade: not stated
Age (range): not stated; gender (m/f): 119:158; BMI: comorbidities: not stated; mean duration of surgery: 48 to 49.5 min
  1. Forced air warming blanket-systemic warming (active warming device); duration: 30 min (left on until just before surgery) (average: 44.94 min); not stated; intervention body area covered: whole body; proportion covered; n=139
  2. Non contact radiant heat dressing-local warming; usual care; duration: 30 min (average: 38.73 min); not stated control body area covered:; proportion covered wound treated only; n=138
Sheng 2003 (1)
Trial held in USA
Funding: not stated
Perioperative phase: preoperative; surgery type: not stated; surgical speciality; surgery duration: not stated
Anaesthesia type: not stated/unclear; anaesthesia duration; premedication: not stated;
ASA grade: mixed
Age (range): 37.5 years; gender (m/f): 23:30; BMI: not stated
comorbidities: not stated; outpatient setting surgery; holding room temperature: not stated; or temperature: 21°C; iv fluid: room temperature
  1. Reflective hat and jackets (thermo-lite) (passive warming device); duration: on arrival to outpatients clinic and just prior to transfer to or; intervention body area covered: not stated; proportion covered: not stated; n=26
  2. No hats or jackets; usual care; duration: not stated; control body area covered; proportion covered: not stated; n=26
Sheng 2003 (2)
Trial held in USA
Funding: not stated
Perioperative phase: preoperative; surgery type: not stated; surgical speciality; surgery duration: not stated;
Anaesthesia type: not stated/unclear; anaesthesia duration; premedication: not stated
ASA grade: mixed
Age (range): 37.5 years; gender (m/f): 23:28; BMI: not stated
comorbidities: not stated; outpatient setting surgery; holding room temperature: not stated; or temperature: 21°C; IV fluid: room temperature
  1. Reflective hat (thermolite) (passive warming device); duration: upon arrival int° Clinic and removed prior to transfer to or; intervention body area covered: head; proportion covered not stated; n=30
  2. No warming; usual care; duration: not stated; control body area covered:; proportion covered; n=23

From: APPENDIX C, CHARACTERISTICS OF INCLUDED STUDIES

Cover of The Management of Inadvertent Perioperative Hypothermia in Adults
The Management of Inadvertent Perioperative Hypothermia in Adults [Internet].
NICE Clinical Guidelines, No. 65.
National Collaborating Centre for Nursing and Supportive Care (UK).
Copyright © 2008, National Collaborating Centre for Nursing and Supportive Care.

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