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Thread: 2 embolisms

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    Default 2 embolisms

    A Tale of 2 Embolisms. A friend & I suffered Arterial Gas Embolisms (AGE) almost exactly a year apart, on very similar dives, on the same boat, in almost the exact same location, while we were diving together. Both dives:
    1) @185fsw
    2) Back gas was air
    3) Short bottom times because the anchor was dragging
    4) No computer violations
    5) Onset of symptoms within 3-4 minutes
    6) Paralyzed on 1 side – his left, my right
    7) Fully resolved on surface O2 within 30 minutes
    8) We both walked up on the dock when we got back
    9) Both took a level 1 chamber ride as a precaution
    10) Both have resumed diving with no aftereffects
    A few differences:
    1) My dive had 3-4 minutes bottom time; his was a true bounce dive
    2) My ascent was slower due to the amount of scope on the anchor
    3) I switched to 50% O2 @ 70fsw even though I didn’t need to as I wasn’t sure I could use the O2 hang reg because of the current. I was able to use it so I had quite a bit safety margin.
    Posted for information purposes only. Informed, thoughtful comments are welcome.

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    Default

    Have you guys been checked for PFOs?

    C

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    Default

    Glad you guys recovered quickly. Hard to read this, I am diving 180 on Saturday. I can only hope all our divers are safe.
    The waves are 2'...over the bow!

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    Default

    Quote Originally Posted by chuckd View Post
    Have you guys been checked for PFOs?

    C
    No we have not. The hyperbaric docs didn't suggest it either.

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    Default

    Correction to above post. My friend was checked for PFO & does NOT have it.

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    Steve,
    Hit a higher O2 mix than 50%. Nearly useless for the extra weight. Try 80% at 30ish fsw. That will keep you MUCH lower on your nitrogen loading, as well as helping WAY more to scrub the nitrogen out. I carry MINIMUM 80% if only one bottle, and always O2 and 50/50 if two stage bottles. Two bottles on dives that deep might not be a bad idea!
    -Zack

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    Quote Originally Posted by zack View Post
    Steve,
    Hit a higher O2 mix than 50%. Nearly useless for the extra weight. Try 80% at 30ish fsw. That will keep you MUCH lower on your nitrogen loading, as well as helping WAY more to scrub the nitrogen out. I carry MINIMUM 80% if only one bottle, and always O2 and 50/50 if two stage bottles. Two bottles on dives that deep might not be a bad idea!
    -Zack
    Read more carefully. I had 50% with me, 100% hanging from the boat. I used both.

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    I read it perfectly. You should not PLAN on a contingency of having to hit 50% to stay out of your danger zone. You either PLAN on diving it on a back gas, doing it as a pure bounce, or you decompress correctly. In my opinion, you should have done away with your bottle of 50%, and carried 80 on you. That way, your nitrogen loading decreases SIGNIFICANTLY (check Buuhlman!) as soon as you hit it. 50 does you hardly any good, even if you hit it at a deeper depth, as you are STILL ONGASSING. You can't have your cake and eat it too. Safe diving Steve!
    -Zack

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