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Still curious of what happened - still confused.



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Old 18th August 2007, 09:31   #11 (permalink)
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Re: Still curious of what happened - still confused.

Quote: (Originally Posted by decoweenie) View Original Post
This is just IMHO since I have been scootering on Rebreather for a long time. The first thing I do with a DSV/BOV is building a chin rest.

If you are going to scooter, it is advisable to have a chin rest for whatever you are breathing on to relieve the drag thus the amount of biting on the mouth piece.

Biting the mouth piece hard will eventually ruin the mouth piece leading a potential bigger issue u/w. And it is not comfortable.

Some people are using longer bite piece to add security, but that doesn't take the pressure off from the top of the DSV/BOV resulting in pulling the DSV down. And that could result in a lead source around the upper lip area.

hi Deco,

just what exactly do you mean by a chin rest. have you got a picture to show me? i 've bought a KM-48, but have accidentaly spoiled the rubber that is in the pod. before i have no problem with the KM-48. no issues. but now, i do.

please throw a couple of pics. am interested.

Thanks.

Spyros
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Old 18th August 2007, 09:33   #12 (permalink)
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Re: Still curious of what happened - still confused.

I am really glad your ok mate!

Thanks for sharing with us so we can all learn - it just goes to show how easy it is for things to go wrong and then when you compensate for one or two little things they all sort of add up.

I think BSAC call it the incident pit and this is a great lesson for us all to learn - thanks again and glad your ok.
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Old 18th August 2007, 09:37   #13 (permalink)
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Re: Still curious of what happened - still confused.

Quote: (Originally Posted by Outlaw) View Original Post
just what exactly do you mean by a chin rest.
A part that takes the drag weight of the DSV/BOV on your chin (below your lips) when you scooter or dive in strong current so you do not have to bite the mouthpiece hard to keep it in place.

Do a search for a pic since I believe I have post one example in the past.
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Old 18th August 2007, 09:40   #14 (permalink)
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Re: Still curious of what happened - still confused.

Hi Spyros,

it's time to install your new BOV.
In case you feel "not normal", 1/4 turn and you are OC, take a few breaths, if you are getting better, you know there is something wrong with the rebreather.

Cheers
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Old 19th August 2007, 05:35   #15 (permalink)
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Re: Still curious of what happened - still confused.

Spyros

Thanks for sharing and allowing your experience to become a lesson

Glad you are OK and reflecting on it all and learning from it.

Take it Easy....
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Old 19th August 2007, 06:14   #16 (permalink)
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Re: Still curious of what happened - still confused.

Quote: (Originally Posted by Outlaw) View Original Post
To Abbo:

i dont know what you mean really. i was constantly looking at my display.
I certainly meant no critisicm: Rebreather World isn't that kind of site!
With ox tox as your primary suspect, I was naturally intrigued just how high your PO2 was, though most Megs don't have real-time recordings to analyse afterwards. My understanding was that most divers can really tolerate PO2s of well over 2 for a considerable time, so ox tox doesn't seem that likely, unless you had some dramatic spikes does it? Whatever, I'm glad you got out OK. Cheers, Nicholas
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Old 19th August 2007, 09:04   #17 (permalink)
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Re: Still curious of what happened - still confused.

Spyros;

From the photo of the scrubber you provided, it appears the top part of the scrubber got wet (i.e. via the inhale side somehow). If that is so, your sensors were probably soaked, and likely under-calling your actual PO2.

Are your checkvalves ok, and remaining part of inhale loop?

Good story and thanks for the post.

G
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Old 19th August 2007, 18:47   #18 (permalink)
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Re: Still curious of what happened - still confused.

hey guys,

i dont take offences. i wish i could quote everybody, but dont know how to do it really.

am glad you did not find this post as too long. i just wanted to share and let others re-think before doing something like that. you never know. even if someone - or just one - among the thousands finds it useful, then its a bonus

well, Abbo, i did not felt offended. to be honest i thought that my hoses whole set was ok. and to Gilles, you are right. i kept thinking now that you are right. there is something that came through my mind now though.

i had to travel about 2 hours and had the rebreather in tha back of my car after the dive. it was put on its back. not standing. do you think that this is the reason that the scrubber got wet like that? so maybe it was not wet at the beggining, or during the dive.

what do you think? i just cannot believe that this is how it was during the dive. and just thinking to find an alternative answer and i thought of this. what do you guys think?

thanks to all for taking to time t bother.

Spyros
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Old 19th August 2007, 23:10   #19 (permalink)
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Re: Still curious of what happened - still confused.

Quote: (Originally Posted by Outlaw) View Original Post
hey guys,

i wish i could quote everybody, but dont know how to do it really.
Just click one of the buttons on bottom RHS to quote. "Quote" to include single post, multi-quote button for each post you want to include in a reply (also using "New Reply" button on bottom LHS of discussion string after you select all the quotes you want).

I've never seen my upper scrubber get wet like that, but there's another person who enquired here in Rebreather World. Don't know what the result was. I would inspect your checkvalves, and each of your loop connections.

I'm unsure you had a tox. My limited experience at vomiting has been due to other reasons and this caused big hiccups to occur in the process. That must have been awful underwater.

Edit: As an afterthought, maybe your inhale loop flood (albeit limited and cause unkown), created a small caustic cocktail you inadverdently ingested, causing you to vomit?
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Last edited by Gilles : 20th August 2007 at 07:24. Reason: To include afterthought.
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Old 20th August 2007, 04:49   #20 (permalink)
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Re: Still curious of what happened - still confused.

Spyros,

Glad you are OK. Sounds like a very scary experience. Your description of your symptoms do not sound like a typical O2 tox event to me. Although not a doctor, to me it sounds more like some kind of narcosis/CO2 type event. My experience has been that none of these kind of things are black and white, and there may not be a single cause either. Many times, it may be a combination of things going wrong, including stress, temperature, limited viz, work load, not enough sleep the night before, etc. etc.

By the way, don't worry about the "30 year old blues"! You can start to whine about not being able to keep up with the young bucks when you are my age! (50)

Dive safe, thanks for sharing.

Regards,
Randy
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