Evaluation of a Forced-Air System for Warming Hypothermic Postoperative Patients

Lennon, Robert L.; Hosking, Michael P.; Conover, Margaret A.; Perkins, William J.

doi:10.1213/00000539-199004000-00014

Cited by 67 publications

(25 citation statements)

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“…Forced-air warmers have also been evaluated against certain types of passive insulation including the use of cotton blankets, reflective blankets and sleeping bags [45][46][47][48][49][50]. These studies have shown superiority of forced-air warming both to prevent postoperative hypothermia and to rewarm already hypothermic individuals ( Table 2).…”

Section: Forced-air Warmersmentioning

confidence: 99%

Peri‐operative warming devices: performance and clinical application

2014

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SummarySince the adverse consequences of accidental peri-operative hypothermia have been recognised, there has been a rapid expansion in the development of new warming equipment designed to prevent it. This is a review of peri-operative warming devices and a critique of the evidence assessing their performance. Forced-air warming is a common and extensively tested warming modality that outperforms passive insulation and water mattresses, and is at least as effective as resistive heating. More recently developed devices include circulating water garments, which have shown promising results due to their ability to cover large surface areas, and negative pressure devices aimed at improving subcutaneous perfusion for warming. We also discuss the challenge of fluid warming, looking particularly at how devices' performance varies according to flow rate. Our ultimate aim is to provide a guide through the bewildering array of devices on the market so that clinicians can make informed and accurate choices for their particular hospital environment.

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Section: Forced-air Warmersmentioning

confidence: 99%

Peri‐operative warming devices: performance and clinical application

2014

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“…Postoperative shivering has been attributed to the following factors: uninhibited spinal reflexes [2], pain [3], decreased sympathetic activity [4], adrenal suppression [5] and thermoregulatory shivering in response to intra-operative hypothermia , no relationship has been demonstrated between axillary temperature and the occurrence of shivering [8]. Postoperative shivering can be treated by skin-surface warming [9], radiant heat application [ 101 or pharmacologically [I I].…”

mentioning

confidence: 99%

The effect of prophylactic clonidine on postoperative shivering

Vanderstappen¹,

Vandermeersch²,

Vanacker³

et al. 1996

Anaesthesia

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SummaryThe primary goal of' this study was to assess the influence of clonidine administered after induction on postoperative shivering after elective peripheral surgery. The effect of clonidine on intra-operative haemodynamics (blood pressure and heart rate) during thejirst 30min after induction and on the postoperative sedation of the patient was also investigated. Two hundred and eighty male ASA 1 and 2 patients, undergoing elective peripheral surgery were randomly administered either placebo or clonidine 2 pg.kg-' intravenously over 10 min after induction of anaesthesia. Clonidine was found to reduce the total incidence (p = 0.024, the severity (p = 0.005) and the duration (p = 0.01) of postoperative shivering. Clonidine did not increase postoperative sedation or diminish overall consciousness. We conclude that administration of clonidine 2 pg.kg-' intravenously after induction of anaesthesia is safe and reduces postoperative shivering in this group of patients. Key wordsComplications; shivering. Pharmacology; clonidineRecovery from anaesthesia and surgery is frequently accompanied by involuntary muscular activity. Besides the discomfort for the patient, shivering can exacerbate postoperative pain and induce complications in patients with coronary artery disease or heart failure by increasing oxygen consumption [I] To date, no unequivocal direct evidence has been published to show that preventive pre-or postoperative administration of clonidine reduces postanaesthetic shivering after peripheral surgery. This large, randomly administered, double-blind study was performed to evaluate the influence of clonidine administered at induction on postoperative shivering after elective peripheral surgery. The effect of clonidine on intra-operative haemodynamics (blood pressure and heart rate) during the first 30 min after

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“…There are many methods of warming intraoperative patients such as various types of blankets, heating lamps [4,5,8], a blood warmer [9], and artificial noses [10]. More recently, there have been some studies on the BH [4,5].…”

Section: Discussionmentioning

confidence: 99%

“…The cover is made of plastic and paper bonded into tubular channels with slits through which warm air flows around the patient. The heat source consists of a 400-watt heating element with a fan, a microprocessor-based temperature controller limited to a maximum of 43~ a hose connecting the heat source output to the patient cover, and a 5-1xm filter within a connecting hose [5]. Patients in both groups also received circulating blanket warming (KRthermia RK600, Baxter Health Care, Valencia, Calif.) set at 37~…”

Section: Methodsmentioning

confidence: 99%

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Effects of a forced-air system (Bair Hugger, OR-type) on intraoperative temperature in patients with open abdominal surgery

et al. 1994

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Intraoperative hypothermia is difficult to avoid and may present a significant clinical risk during the early postoperative phase. We evaluated a forced-air system [Bair Hugger, OR-type (BH)] for warming intraoperative patients with open abdominal surgery. Twenty patients received BH warming [BH(+) group] and another 20 patients, who served as controls, did not [BH(-) group]. Patients in both groups also received circulating blanket warming. Tempertures were measured at 30-min intervals throughout the operation in the rectum and on the tip of the index finger opposite the nail bed. The average operation time was 168.8±16.2 min. Rectal and fingertip temperatures in the BH(+) group were significantly higher than those in the BH(-) group, and central-peripheral temperature gradients in the BH(+) group were significantly smaller than those in the BH(-) group during the study, except at 180 min. No shivering occurred in either group. Therefore, BH is an effective warming device during open abdominal surgery.

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Evaluation of a Forced-Air System for Warming Hypothermic Postoperative Patients

Cited by 67 publications

References 0 publications

Peri‐operative warming devices: performance and clinical application

Peri‐operative warming devices: performance and clinical application

The effect of prophylactic clonidine on postoperative shivering

Effects of a forced-air system (Bair Hugger, OR-type) on intraoperative temperature in patients with open abdominal surgery

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