Crackle - an overview | ScienceDirect Topics

The crackles (“Velcro” sound) of HF are described as “wet” as compared to the “dry” crackles of pulmonary fibrosis, and are caused by air moving through fluid‐filled airways. In mild HF, crackles will be limited to the lung bases. Atelectasis also causes bibasilar crackles, but the crackles of atelectasis clear after several repeated inspirations. Crackles will be detected higher in the chest with worsening severity of HF. Crackles may be absent in patients with chronic HF even in the setting of elevated pulmonary capillary wedge pressure. Also, crackles may be difficult to hear in patients with emphysema or other coexisting pulmonary diseases. Steven McGee MD, in Evidence-Based Physical Diagnosis (Fourth Edition), 2018 Crackles are discontinuous sounds, resembling the sound produced by rubbing strands of hair together in front of the ear or by pulling apart strips of Velcro. There are coarse crackles, which are loud, low pitched, and fewer in number per breath, and fine crackles, whic

The crackles (“Velcro” sound) of HF are described as “wet” as compared to the “dry” crackles of pulmonary fibrosis, and are caused by air moving through fluid‐filled airways. In mild HF, crackles will be limited to the lung bases. Atelectasis also causes bibasilar crackles, but the crackles of atelectasis clear after several repeated inspirations. Crackles will be detected higher in the chest with worsening severity of HF. Crackles may be absent in patients with chronic HF even in the setting of elevated pulmonary capillary wedge pressure. Also, crackles may be difficult to hear in patients wi