Patients needing assessment

Although there is no trial evidence for the benefit of in-flight supplemental oxygen, consider in-flight supplemental oxygen for patients:

with a history of respiratory problems during air travel (eg breathlessness, chest pain, confusion, syncope)
with severe asthma or severe chronic obstructive pulmonary disease (COPD) (forced expiratory volume in 1 second [FEV₁] less than 30% predicted)
with severe restrictive lung disease (forced vital capacity [FVC] less than 1 Litre)
with oxygen saturation measured by pulse oximetry (SpO₂) less than 95%
within 6 weeks of hospital discharge for acute severe or acute-on-chronic respiratory illness
with a comorbidity that is worsened by hypoxaemia (eg cerebrovascular disease, coronary artery disease, heart failure)
with a pre-existing requirement for supplemental oxygen or ventilator support, including noninvasive ventilation.