Serrano-Cumplido, ATrillo Calvo, EGarcía Matarín, LDel Río Herrero, AGamir Ruiz, F JMolina Escribano, FVelilla Zancada, S2023-05-032023-05-032021-04-20http://hdl.handle.net/10668/22518COVID-19 behaves like a heterogeneous disease. Some patients may develop dyspnea-free hypoxemia during its evolution (silent hypoxemia). Pulse oximetry plays a crucial role in detecting hypoxemia in these patients, especially when they remain at home. Patients with SpO2 levels ≤ 92% or desaturations ≥ 3% after exercise test require hospital admission. Progressive saturation declines reaching SpO2 levelsesCOVID-19HipoxemiaHipoxemia silenteHypoxemiaPulse oximetryPulsioximetríaSilent hypoxemiaCOVID-19DyspneaHumansHypoxiaOximetrySARS-CoV-2research article33947594open access10.1016/j.semerg.2021.03.0041578-8865PMC8057732https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8057732https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8057732/pdf