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The Effects And Characteristics Of Increased Respiratory Dead Space In Dogs

Report Number: WADD TR 60-660
Author: Barnett, Thomas B.
Author: Peters, Richard M.
Corporate Author: University Of North Carolina School Of Medicine
Laboratory: Biomedical Laboratory
Date of Publication: 1960-12
Pages: 14
Contract: AF 33(616)-6261
Project: 7163
Task: 71819
PB Number: PB154168
AD Number: AD0258788

Artificial breathing apparatus such as oxygen masks involves added external respiratory dead space. In dogs with permanent tracheostomies, chronic increase in dead space has been maintained with lengths of 0.75-inch interior diameter vinyl plastic tubing. A dead space of 2030 cc./kg. is not tolerated for more than 24 hours. The amount of mixing and air streaming within this tubing and in tubing of 0.5-inch interior diameter and 1.5-inch interior diameter was determined. There was very little mixing in the two smaller tubes but, in the large one, the amount of mixing was significant.

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