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  • The effect of a forced-air warming blanket on patients' end-tidal and transcutaneous carbon dioxide partial pressures during eye surgery under local anaesthesia: a single-blind, randomised controlled trial.

The effect of a forced-air warming blanket on patients' end-tidal and transcutaneous carbon dioxide partial pressures during eye surgery under local anaesthesia: a single-blind, randomised controlled trial.

Anaesthesia (2015-09-09)
S Sukcharanjit, A S B Tan, A V P Loo, X L Chan, C Y Wang
ABSTRACT

Surgical drapes used during eye surgery are impermeable to air and hence risk trapping air underneath them. We investigated the effect of a forced-air warming blanket on carbon dioxide accumulation under the drapes in patients undergoing eye surgery under local anaesthesia without sedation. Forty patients of ASA physical status 1 and 2 were randomly assigned to either the forced-air warmer (n = 20) or a control heated overblanket (n = 20). All patients were given 1 l.min(-1) oxygen. We measured transcutaneous and end-tidal carbon dioxide partial pressures, heart rate, arterial pressure, respiratory rate, temperature and oxygen saturation before and after draping, then every 5 min thereafter for 30 min. The mean (SD) transcutaneous carbon dioxide partial pressure in the forced-air warming group stayed constant after draping at 5.7 (0.2) kPa but rose to a maximum of 6.4 (0.4) kPa in the heated overblanket group (p = 0.0001 for the difference at time points 15 min and later). We conclude that forced-air warming reduces carbon dioxide accumulation under the drapes in patients undergoing eye surgery under local anaesthesia.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Carbon dioxide, ≥99.8%
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500 mg
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$406.00
Sigma-Aldrich
Carbon-12C dioxide, 99.99 atom % 12C
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500 mg
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$406.00
Sigma-Aldrich
Carbon-12C dioxide, 99.9 atom % 12C
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SKUPack SizeAvailabilityPriceQuantity
500 mg
In Stock
Details...
$406.00