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Colegio de Medicina Interna de México.

2023, Number 2

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Med Int Mex 2023; 39 (2)

Correlation between ventilation perfusion PaO2/FiO2 ratio and SpO2/FiO2 ratio in hospitalized adult COVID-19 patients

Mendoza-Morimoto II, López-López RM

Language: Spanish
References: 33
Page: 227-234
PDF size: 342.42 Kb.


ABSTRACT

Objective: To determine the correlation between the ventilation perfusion PaO2/FiO2 ratio and the SpO2/FiO2 ratio in hospitalized COVID-19 patients.
Materials and Methods: Retrospective, cross-sectional, analytical, single-center epidemiological study. It included patients who were admitted with a COVID-19 diagnosis to the High Specialty Unit no. 2 from June 1st to August 31st, 2020. Oxygen saturation and FiO2 contribution were reviewed in the electronic file, as well as an arterial blood gas report.
Results: One hundred eighty-six patients were evaluated, of which 52.2% were men; mean age was of 59.17 years. It was found that 14.5% were health personnel. An average hospital stay of 10.45 days was observed; 32.3% of the population studied died. A positive correlation was observed between the SpO2/FiO2 and PaO2/FiO2 indices (r = 0.798). After carrying out the linear regression, we obtained an r2 of 0.634, so we can predict the oxygenation value by 63.4% through non-invasive measurements.
Conclusions: This study allowed to validate the positive correlation between the non-invasive respiratory SpO2/FiO2 ratio and the invasive respiratory PaO2/FiO2 ratio for the classification of severity in acute respiratory failure syndrome in infection by SARS-CoV-2 and thus offer an alternative for the hospital care areas that do not have a gasometer available.


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