Effect of Heated Humidified Gases on Temperature Drop after Cardiopulmonary Bypass

Ralley, Fiona E.; Ramsay, James G.; Wynands, J. Earl; Townsend, G. E.; Whalley, David G.; DelliColli, P

doi:10.1213/00000539-198412000-00009

Cited by 34 publications

(16 citation statements)

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“…Several techniques have been used to prevent or diminish postoperative hypothermia after cardiac surgery: warming blankets (7,21), heated and humidified inspired gases (7,22), warmed intravenous solutions (9, 10), aluminium foil space blanket (23), radiant heating (7,8,10,23), convective heating (24), rewarming during CPB using a vasodilator (21) and extended rewarming (to a rectal temperature of at least 36aeC) (9,10). In spite of these techniques, most patients are hypothermic (with a subnormal body heat capacity) after cardiac surgery with hypothermic CPB.…”

Section: Discussionmentioning

confidence: 99%

The effects of two rewarming strategies on heat balance and metabolism after coronary artery bypass surgery with moderate hypothermia

Hanhela

Mustonen

Korhonen

et al. 1999

Acta Anaesthesiol Scand

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Section: Discussionmentioning

confidence: 99%

The effects of two rewarming strategies on heat balance and metabolism after coronary artery bypass surgery with moderate hypothermia

Hanhela

Mustonen

Korhonen

et al. 1999

Acta Anaesthesiol Scand

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“…Several studies have dealt with difficulties in avoiding hypothermia after cardiopulmonary by‐ pass procedures ( 7, 13–15). Techniques aimed at preventing postoperative hypothermia include prolonged rewarming ( 16), high bypass flows, vasodilator therapy during rewarming ( 11), and heated humidification of inspired gases ( 17). None of these techniques has been totally successful.…”

mentioning

confidence: 99%

“…The inspired gases were not warmed in this study. Several studies have dealt with the importance of heated humidified inspired gases in avoiding peroperative hypothermia ( 17, 18). The effectiveness of heated humidification after CPB could not be confirmed by these studies, which found it likely that the remaining cool tissues, apart from the rewarmed core have a much greater effect on body temperature than any heat added via the respiratory tract ( 17).…”

mentioning

confidence: 99%

Convective warming blankets improve peroperative heat preservation in congenital heart surgery

Schlünzen

Vestergaard

Møller‐Nielsen

et al. 1998

Pediatric Anesthesia

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Peroperative heat preservation, following hypothermic cardiopulmonary bypass (CPB) in children, has always been a challenge to the anaesthetist. We studied the efficiency of a convective heating system on peroperative heat preservation in 50 children undergoing congenital heart surgery. Twenty-five children, rewarmed by CPB and heating mattress, were randomly selected (Group 1). Another 25 children, rewarmed by CPB, heating mattress and convective warming blankets in addition (Group 2), were selected so the two groups were comparable regarding age, weight and anaesthetic management. The central and peripheral temperatures were measured during bypass, at the end of bypass and at the end of operation. A retrospective evaluation showed that during bypass the peripheral temperature was significantly lower in Group 2 than in Group 1, with no significant difference in central temperature. At the end of bypass there was no significant difference between the two groups. At the end of operation the central and peripheral temperatures were significantly higher in Group 2. In conclusion convective warming blankets are effective in keeping or even raising the temperature following congenital heart surgery.

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“…Another study 98 noted a similar relationship between bladder and nasopharyngeal temperatures at the end of CPB when examining the effect of heated humidified gas on temperature afterdrop. A drawback of this study is that instrument accuracy was not assessed and the position of the probe in the nasopharynx was not specified.…”

Section: Validity Of Bladder Temperature Measurements During Thermallmentioning

confidence: 66%

Monitoring Bladder Temperatures in the OR

Fallis

2002

AORN Journal

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Temperature monitoring via the urinary bladder has become common in the OR, often replacing monitoring at the rectal site. A systematic, integrated review and synthesis of the literature was undertaken to assess the validity of using the urinary bladder as a site for temperature measurement in the OR. During steady thermal states, bladder temperature performed well, providing temperatures similar to those of core sites. In contrast, poor performance was demonstrated during rapid thermal changes, such as during the rapid cooling and rewarming phases of cardiopulmonary bypass. At such times, a significant lag in response rate at the bladder site was noted by multiple investigators. This delayed responsiveness during thermally dynamic states, however, may provide information regarding the adequacy of rewarming during bypass at sites intermediate between the core and periphery. Limited research indicates that urinary bladder temperature may be influenced by urine flow rate, and additional research is required in this area. The cost effectiveness of this method of temperature measurement requires investigation as well.

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Effect of Heated Humidified Gases on Temperature Drop after Cardiopulmonary Bypass

Cited by 34 publications

References 0 publications

The effects of two rewarming strategies on heat balance and metabolism after coronary artery bypass surgery with moderate hypothermia

The effects of two rewarming strategies on heat balance and metabolism after coronary artery bypass surgery with moderate hypothermia

Convective warming blankets improve peroperative heat preservation in congenital heart surgery

Monitoring Bladder Temperatures in the OR

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