The item discussed here is the Robertshaw 28Fr left-sided double lumen endotracheal tube. Dorsch and Dorsch describe this thing as a "lung isolation device". Of course, then Dorsch and Dorsch get into some indepth discussions of every type of rare and exotic dual lumen tube there is. There is the Carlens, the White, the Robertshaw, the Broncho-Cath, the Sher-I-Bronch, the Silbroncho, and so forth and so on. I question the relevance of these details in the ICU. We are infrequently exposed to a mind-paralyzing array of choice when it comes to dual lumen tubes.