Development of a New Method for Evaluating Heat and Moisture Exchanger Performance.

ABSTRACT:

Background

A model system described in International Organization for Standardization 9360 is the standard method for estimating the humidifying performance of heat and moisture exchangers (HMEs). However, there are no reliable bedside methods for evaluating the ongoing humidification performance of HMEs. Therefore, this study aimed to develop 2 clinically applicable methods for estimating the ongoing humidifying performance of HMEs and to evaluate their reliability in a model system.

Methods

Physiologically expired gas was simulated using a heated humidifier, and ventilation was delivered using a ventilator with constant flow through 3 different types of HMEs. Relative humidity (RH) was measured using a capacitive-type moisture sensor. Water content lost during expiration w

SUBMITTER: Nagata K 

PROVIDER: S-EPMC11469012 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature