Obstruction of bacterial filters by edema fluid.
D000770:Anesthesia, Endotracheal / Q000009:adverse effects / Q000295:instrumentation*; D001424:Bacterial Infections / Q000517:prevention & control; D005260:Female; D005374:Filtration / Q000009:adverse effects / Q000295:instrumentation*; D006801:Humans; D008875:Middle Aged; D011654:Pulmonary Edema / Q000503:physiopathology*