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Endotracheal temperature and humidity in laryngectomized patients in a warm and dry environment and the effect of a heat and moisture exchanger

✍ Scribed by Renske J. Scheenstra; Sara H. Muller; Frans J. M. Hilgers

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
559 KB
Volume
33
Category
Article
ISSN
1043-3074

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✦ Synopsis

Abstract

Background

This study was designed to assess endotracheal climate in laryngectomized patients in a warm and dry environment and the effects of a heat and moisture exchanger (HME).

Methods

Endotracheal temperature and humidity were measured in 11 laryngectomized patients with a regularly used HME (Provox Normal HME; R‐HME), an HME with antimicrobial filter (Provox Micron HME; F‐HME), and without HME (open stoma). Measurements were performed at 32°C, 34°C, and 38°C (<25% relative humidity).

Results

Both R‐HME and F‐HME increased end‐inspiratory humidity (AH~insp~) equally (range, 3.4 to 5.6 mgH~2~O/L). The R‐HME has a cooling effect on end‐inspiratory temperature (T~insp~), which is similar for all tested environmental conditions (−3.8°C); F‐HME decreases T~insp~ less (range, −1.3 to −0.6°C).

Conclusions

In a warm and dry environment, both R‐ and F‐HME significantly cool and humidify inspired air. Therefore, consistent use of an HME under these climate conditions is also probably clinically beneficial. © 2010 Wiley Periodicals, Inc. Head Neck, 2010

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