Atelectasis from the outside (tumor, lymph node, tubercle). Another cause is poor surfactant spreading during inspiration, causing the surface tension to be at its highest which tends to collapse smaller alveoli. Atelectasis may also occur during suction, as along with sputum, air is withdrawn from the lungs. There are several types of atelectasis according to their underlying mechanisms or the distribution of alveolar collapse; resorption, compression, microatelectasis and contraction atelectasis. Relaxation atelectasis (also called passive atelectasis) is when a pleural effusion or a pneumothorax disrupts the contact between the parietal and visceral pleurae. Risk factors associated with increased likelihood of the
The Blue Humans The Blue Humans The Blue Humans is the name used by experimental guitarist Rudolph Grey for the improvised performances he leads with a variety of other musicians. Grey first came to notice in the late-1970s New York City post punk and art scene which also produced Sonic Youth and Swans, and played in the influential no wave band Mars. Since then, he has released solo material as well as several Blue Humans records, the latter mostly live recordings. Blue Humans members and collaborators have included Tom Surgal, Arthur Doyle, Beaver Harris, Alan Licht, Charles Gayle, and Thurston Moore. Blue Humans