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Article Abstract
Introduction: The aim of our study was to compare the reliability and safety of the classical I-AT with the continuous positive airway pressure apnea test (CPAP-AT).
Material And Methods: In the group of 48 patients (group O), an I-AT was performed at the end of BD diagnostic procedures, and approximately 1-1.5h later CPAP-AT with 100% FiO and CPAP of 10cm HO, provided by ventilator in CPAP mode. After pre‑oxygenation with 100% FiO for 10min, the PaO/FiO ratio was recorded prior to I-AT at time-point one (T1) and prior to CPAP-AT at time-point two (T2). Group O was categorized into subgroup N-H (non-hypoxemic), consisting of 41 patients with good lung function, and subgroup H (hypoxemic) consisting of 7 patients with poor lung function. Within each subgroup PaO/FiO at T1 and T2 were compared.
Results: In Group O, PaO/FiO decreased from 321±128mmHg at T1 to 291±119mmHg at T2 (p=0.004). In subgroup N-H, PaO/FiO declined from 355±103 to 321±100mmHg (p=0.008), and in subgroup H, PaO/FiO remained almost unchanged. Additionally, in 4 patients from subgroup N-H, PaO/FiO decreased below 200mmHg at T2.
Conclusions: Our study indicates that I-AT may compromise pulmonary function and this may support the recommendation of safer CPAP-AT alternative.
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| http://dx.doi.org/10.1016/j.jcrc.2017.10.038 | DOI Listing |
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