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KMID : 1195620150080010069
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Clinical and Experimental Otorhinolaryngology
2015 Volume.8 No. 1 p.69 ~ p.75
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Evaluation of an Active Humidification System for Inspired Gas
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Roux Nicolas G.
Plotnikow Gustavo A.
Villalba Dario S.
Gogniat Emiliano
Feld Vivivana
Vairo Noelia Ribero
Sartore Marisa
Bosso Mauro
Scapellato Jose L.
Intile Dante
Planells Fernando
Noval Diego
Bunirigo Pablo
Jofre Ricardo
Nielsen Ernesto Diaz
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Abstract
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Objectives: The effectiveness of the active humidification systems (AHS) in patients already weaned from mechanical ventilation and with an artificial airway has not been very well described. The objective of this study was to evaluate the performance of an AHS in chronically tracheostomized and spontaneously breathing patients.
Methods: Measurements were quantified at three levels of temperature (T°) of the AHS: level I, low; level II, middle; and level III, high and at different flow levels (20 to 60 L/minute). Statistical analysis of repeated measurements was performed using analysis of variance and significance was set at a P<0.05.
Results: While the lowest temperature setting (level I) did not condition gas to the minimum recommended values for any of the flows that were used, the medium temperature setting (level II) only conditioned gas with flows of 20 and 30 L/minute. Finally, at the highest temperature setting (level III), every flow reached the minimum absolute humidity (AH) recommended of 30 mg/L.
Conclusion: According to our results, to obtain appropiate relative humidity, AH and T° of gas one should have a device that maintains water T° at least at 53℃ for flows between 20 and 30 L/m, or at T° of 61℃ at any flow rate.
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KEYWORD
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Tracheostomy, Respiratory Therapy, Patient Care, Oxygen Inhalation Therapy, Ventilator Weaning
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