How do heat and moisture exchangers compare with heated humidifiers in people who are mechanically ventilated?

2018 ◽  
Keyword(s):  
Mechanically Ventilated ◽  
Heat And Moisture Exchangers ◽  
Heated Humidifiers ◽  
Heat And Moisture

Heat and moisture exchangers in mechanically ventilated intensive care unit patients: A plea for an independent assessment of their performance

2003 ◽  
Vol 31 (3) ◽  
pp. 699-704 ◽  
Author(s):  
Guillaume Thiéry ◽  
Alexandre Boyer ◽  
Etienne Pigné ◽  
Amar Salah ◽  
Arnaud de Lassence ◽  
...  
Keyword(s):  
Intensive Care Unit ◽  
Intensive Care ◽  
Mechanically Ventilated ◽  
Heat And Moisture Exchangers ◽  
Heat And Moisture ◽  
Independent Assessment

scholarly journals Ventilator Circuits, Humidification and Ventilator-Associated Pneumonia

1996 ◽  
Vol 3 (6) ◽  
pp. 397-402
Author(s):  
Dean Hess
Keyword(s):  
Mechanical Ventilation ◽  
Moisture Loss ◽  
Ventilator Associated Pneumonia ◽  
Ventilator Circuit ◽  
Mechanically Ventilated ◽  
Artificial Airway ◽  
Condensate Formation ◽  
Heated Humidifiers ◽  
Technical Issues ◽  
Heat And Moisture

Technical issues in the care of mechanically ventilated patients include those related to the ventilator circuit, humidification and ventilator-associated pneumonia. Principal issues related to ventilator circuits include leaks and compression volume. Circuit compression volume affects delivered tidal volume as well as measurements of auto-positive end-expiratory pressure and mixed expiredPCO2. Resistance through the ventilator circuit contributes to patient-ventilator dyssynchrony during assisted modes of mechanical ventilation. Adequate humidification of inspired gas is necessary to prevent heat and moisture loss. Common methods of humidification of inspired gas during mechanical ventilation include use of active heated humidifiers and passive artificial noses. Artificial noses are less effective than active humidifiers and are best suited to short term use. With active humidifiers, the circuit can be heated to avoid condensate formation. However, care must be exercised when heated circuits are used to avoid delivery of a low relative humidity and subsequent drying of secretions in the artificial airway. Although pneumonia is a complication of mechanical ventilation, these pneumonias are usually the result of aspiration of pharyngeal secretions and are seldom related to the ventilator circuit. Ventilator circuits do not need to be changed more frequently than weekly for infection control purposes, and the incidence of ventilator-associated pneumonia may be greater with more frequent circuit changes.

Physicians' attitude to use heat and moisture exchangers or heated humidifiers: a Franco-Canadian survey

2002 ◽  
Vol 28 (6) ◽  
pp. 719-725 ◽  
Author(s):  
Jean-Damien Ricard ◽  
Deborah Cook ◽  
Lauren Griffith ◽  
Laurent Brochard ◽  
Didier Dreyfuss
Keyword(s):  
Heat And Moisture Exchangers ◽  
Heated Humidifiers ◽  
Heat And Moisture ◽  
Canadian Survey

Humidification, Nebulization, and Gas Filtering

2017 ◽  
Author(s):  
Yuan Lei
Keyword(s):  
Breathing Circuit ◽  
Operating Principle ◽  
Aerosol Therapy ◽  
Heat And Moisture Exchangers ◽  
Additional Issue ◽  
Heated Humidifiers ◽  
Heat And Moisture ◽  
Comprehensive Discussion

‘Humidification, Nebulization, and Gas Filtering’ describes the therapies, which, while not essential to ventilation, are frequently applied together with it. This chapter provides a comprehensive discussion of these devices, including the clinical needs for them and their operating principles, options, and common complications. It describes the composition and operating principle of active heated humidifiers. Artificial humidification brings with it the additional issue of circuit rainout, which may require that heated wires be added to the breathing circuit. The chapter includes a table for troubleshooting issues related to active humidification. Heat and moisture exchangers or HMEs, an alternative to humidifiers, are also discussed. Finally, the chapter turns to the use of in-line nebulizers or aerosol therapy. The chapter ends with a discussion of respiratory gas filtering, which, for all the benefit a bacteria filter brings, also introduce the risk of occlusion.

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