Sizing the lung in dogs: the inspiratory capacity defines the tidal volume.

Autor: Donati PA; Unidade de Terapia Intensiva Veterinária UCIcoop - Buenos Aires, Argentina., Gogniat E; Unidade de Terapia Intensiva, Hospital Italiano de Buenos Aires - Buenos Aires, Argentina., Madorno M; Instituto Tecnológico de Buenos Aires - Buenos Aires, Argentina., Guevara JM; Unidade de Terapia Intensiva Veterinária UCIcoop - Buenos Aires, Argentina., Guillemi EC; Unidade de Terapia Intensiva Veterinária UCIcoop - Buenos Aires, Argentina., Lavalle MDC; Unidade de Terapia Intensiva Veterinária UCIcoop - Buenos Aires, Argentina., Scorza FP; Unidade de Terapia Intensiva Veterinária UCIcoop - Buenos Aires, Argentina., Mayer GF; Unidade de Terapia Intensiva, Hospital Italiano de Buenos Aires - Buenos Aires, Argentina., Rodriguez PO; Unidade de Terapia Intensiva, Centro de Educación Médica e Investigaciones Clínicas - Buenos Aires, Argentina.
Jazyk: Portuguese; English
Zdroj: Revista Brasileira de terapia intensiva [Rev Bras Ter Intensiva] 2018 Apr-Jun; Vol. 30 (2), pp. 144-152.
DOI: 10.5935/0103-507X.20180028
Abstrakt: Objective: To evaluate a novel physiological approach for setting the tidal volume in mechanical ventilation according to inspiratory capacity, and to determine if it results in an appropriate mechanical and gas exchange measurements in healthy and critically ill dogs.
Methods: Twenty healthy animals were included in the study to assess the tidal volume expressed as a percentage of inspiratory capacity. For inspiratory capacity measurement, the mechanical ventilator was set as follows: pressure control mode with 35cmH2O of inspired pressure and zero end-expiratory pressure for 5 seconds. Subsequently, the animals were randomized into four groups and ventilated with a tidal volume corresponding to the different percentages of inspiratory capacity. Subsequently, ten critically ill dogs were studied.
Results: Healthy dogs ventilated with a tidal volume of 17% of the inspiratory capacity showed normal respiratory mechanics and presented expected PaCO2 values more frequently than the other groups. The respiratory system and transpulmonary driving pressure were significantly higher among the critically ill dogs but below 15 cmH2O in all cases.
Conclusions: The tidal volume based on the inspiratory capacity of each animal has proven to be a useful and simple tool when setting ventilator parameters. A similar approach should also be evaluated in other species, including human beings, if we consider the potential limitations of tidal volume titration based on the calculated ideal body weight.
Databáze: MEDLINE
Externí odkaz: