10-02-04, 01:12 PM
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Quote: | Originally Posted by [b Quote[/b] (Ian W @ Feb. 10 2004,08:36)] Quote: | Originally Posted by [b Quote[/b] ]Microbubbles form on all ascents. | As I said, categorical answers are not possible. There have been dives with no bubbles detected. They may have been there, but with the limitations in detection technology we will never know. Quote: | Originally Posted by [b Quote[/b] ](although "trap" isn't a word I've seen used, in this respect before). | Really? That's surprising. Most explanations of the risks of PFO refer to the lungs "filtering" or "trapping" bubbles.
"The lungs can trap and excrete venous bubbles. Without this capability, compressed gas diving would be associated with a much higher arterial bubble load."
" ... it has been demonstrated in vivo that venous bubbles trapped in the pulmonary capillaries after diving may redistribute to the arterial circulation during a subsequent compression."
From: Francis and Mitchell in Bennett and Elliott 5th Ed. |  Granny and Sucking Eggs spings to mind   |