Main Menu
Join Undercurrent on Facebook

The Private, Exclusive Guide for Serious Divers Since 1975 | |
For Divers since 1975
The Private, Exclusive Guide for Serious Divers Since 1975
Join Undercurrent on Facebook
"Best of the Web: scuba tips no other
source dares to publish" -- Forbes
March 2001 Vol. 16, No. 3   RSS Feed for Undercurrent Issues
What's this?

Thinking about DCS

from the March, 2001 issue of Undercurrent   Subscribe Now

Think of decompression illness as an immune phenomenon, says Cmdr., W. A . (Bill) Bateman, MD, head of the Aerospace Life Support at the Defense and Civil Institute of Environmental Medicine (DCIEM) in Canada. At a talk last year in front of members of the Underwater Hyperbaric Medical Society, he had these provocative comments to make:

Twenty years ago, we thought that if bubbles evolve when you reduce pressure, they cause disease. However, we now think that Mr. Bubble is not all of the cause.

Five key advances in the past 20 years that have been o b s e rved and changed our way of thinking are as follows:

1.) Immune responses probably complicate bubble formation and their effects. Bubbles in blood are not the same as bubbles in a beer bottle. Platelets are affected and interact with the bubble. Bubbles reflect stress but the immune response equals strain on the system.

2.) The shunting of bubbles from the right side of the heart to the left as in a patent foramen ovale (PFO) may be critical in some cases.

3.) Relatively small bubbles can have disproportionate effects when lodged in gas-loaded tissues.

4.) There are at least three distinct bubble types: circulating bubbles, obstructive bubbles and autochthonous bubbles, which means bubbles in the tissues. There is a distinct clinical picture caused by each type or they may all be present and give a mixed picture .

5.) Decompression illness should be viewed as probabilistic as opposed to deterministic.

These five advances point to a much more complex and less predictable model for decompression and make it difficult to postulate where decompression illness is improbable. Think of decompression illness as a continuum from no symptoms or signs to severe multi-system involvement.

I want to get all the stories! Tell me how I can become an Undercurrent Online Member and get online access to all the articles of Undercurrent as well as thousands of first hand reports on dive operations world-wide



NEW! Find in  

| Home | Online Members Area | My Account |
| Travel Index | Dive Gear Index | Health/Safety Index | Environment & Misc. Index | Seasonal Planner | Forums | Blogs | Free Articles | Book Picks | News |
| Dive Resort & Liveaboard Reviews | Featured Reports | Recent Issues | Back Issues | Login | Join | Special Offers | RSS | FAQ | About Us | Contact Us | Links |


Copyright © 1996-2016 Undercurrent (www.undercurrent.org)
3020 Bridgeway, Ste 102, Sausalito, Ca 94965
All rights reserved.

cd