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Behavior of Hygrometry During Noninvasive Mechanical Ventilation

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Humidification in the Intensive Care Unit

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Abstract

Recently, there has been growing interest in determining the best hygrometry level during noninvasive ventilation (NIV) and its potential influence on outcome. Several factors may influence hygrometry measures, which can be categorized into physical factors, such as the ventilator parameters, mask design, air leaks and the type of humidifier used, and factors related to the patient’s condition, such as the respiratory rate, mouth breathing and oxygen inspiratory fraction needed. In this chapter, we review the available bench and clinical studies that addressed the utility of hygrometry in NIV and discuss the technical limitations of different humidification systems.

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Abbreviations

AH:

Absolute humidity

AHRF:

Acute hypoxemic respiratory failure

ARF:

Acute respiratory failure

AWR:

Airway resistance

BPAP:

Bi-level positive airway pressure

COPD:

Chronic obstructive pulmonary diseases

CPAP:

Continuous positive airway pressure

EPAP:

End expiratory airway pressure

Ex-pha:

Expiratory phase

FiO2 :

Fraction of inspired oxygen

HH:

Heated humidifier

HWH:

Heated wire humidifier

IPAP:

Inspiratory positive airway pressure

NIV:

Noninvasive mechanical ventilation

OSAS:

Obstructive sleep apnea syndrome

PIF:

Peak inspiratory flow

RH:

Relative humidity

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Author information

Authors and Affiliations

  1. Intensive Care Unit, Hospital Morales Meseguer, Avd Marques Velez s/n, Murcia, Spain

    Antonio Matías Esquinas (International Fellow AARC)

  2. University Sleep Disorders Center, College of Medicine, King Saud University, Riyadh, Saudi Arabia

    Ahmed S. BaHammam

Authors
  1. Antonio Matías Esquinas
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  2. Ahmed S. BaHammam
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Corresponding author

Correspondence to Antonio Matías Esquinas .

Editor information

Editors and Affiliations

  1. Avenida del Parque 2, 3 B, Murcia, 30500, Spain

    Antonio Matías Esquinas

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© 2012 Springer-Verlag Berlin Heidelberg

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Esquinas, A.M., BaHammam, A.S. (2012). Behavior of Hygrometry During Noninvasive Mechanical Ventilation. In: Esquinas, A. (eds) Humidification in the Intensive Care Unit. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-02974-5_10

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  • DOI: https://doi.org/10.1007/978-3-642-02974-5_10

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-02973-8

  • Online ISBN: 978-3-642-02974-5

  • eBook Packages: MedicineMedicine (R0)

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