Heat and moisture exchangers and closed systems
نویسندگان
چکیده
منابع مشابه
Efficiency of airway heat and moisture exchangers in anesthetized humans.
The efficiencies of airway heat and moisture exchanging filters in reducing respiratory water losses and increasing airway temperatures during general anesthesia were studied in five tracheally intubated patients given isoflurane, nitrous oxide, and oxygen anesthesia during controlled ventilation. Filters (Humid-Vent Filter, Humid-Vent 1, Pall Conserve, Siemens 150, and ThermoVent 600) were pla...
متن کاملHeat-moisture exchangers and risk of nosocomial pneumonia.
ICU, 14% [before patient contact] and 25% [after patient con-tact]; cardiac surgery ICU, 6% [before] and 13% [after]). Observations in the medical ICU after introduction of the new, increasingly accessible, alcohol-based, waterless hand antiseptic revealed significantly higher handwashing rates (F<.05). Handwashing compliance improved as accessibility was enhanced: before patient contact, 19%, ...
متن کاملHumidification Performance of Heat and Moisture Exchangers for Pediatric Use
Background. While heat and moisture exchangers (HMEs) have been increasingly used for humidification during mechanical ventilation, the efficacy of pediatric HMEs has not yet been fully evaluated. Methods. We tested ten pediatric HMEs when mechanically ventilating a model lung at respiratory rates of 20 and 30 breaths/min and pressure control of 10, 15, and 20 cmH(2)O. The expiratory gas passed...
متن کاملParametric Evaluation of Governing Heat and Mass Transfer Resistances in Membrane Based Heat and Moisture Exchangers
Studies show that the performance of transcritical R744 systems is highly sensitive to the high side pressure in the gas cooler. Hence use of appropriate strategy to control the high side pressure is essential to extract the best performance from these systems. In the present study, a R744 based air conditioning cycle with two expansion valves is considered for proper control of high side press...
متن کاملInfluence of ambient temperature and minute ventilation on passive and active heat and moisture exchangers.
OBJECTIVE During invasive mechanical ventilation, inspired gases must be humidified. We previously showed that high ambient temperature greatly impaired the hygrometric performance of heated wire-heated humidifiers. The aim of this bench and clinical study was to assess the humidification performance of passive and active heat and moisture exchangers (HMEs) and the impact of ambient temperature...
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ژورنال
عنوان ژورنال: Anaesthesia
سال: 1988
ISSN: 0003-2409,1365-2044
DOI: 10.1111/j.1365-2044.1988.tb06726.x