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©The Author(s) 2022.
World J Virol. Jul 25, 2022; 11(4): 176-185
Published online Jul 25, 2022. doi: 10.5501/wjv.v11.i4.176
Table 2 Cerfolio classification of air leaks
Grade
Description
Grade 1, FE During forced expiration only, typically when asking the patient to cough
Grade 2, EDuring expiration only
Grade 3, IDuring inspiration only
Grade 4, C Continuous bubbling both during expiration and inspiration


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