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Author Topic: DCI, anyone here had it before?  (Read 8639 times)

racerx_

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Re: DCI, anyone here had it before?
« Reply #10 on: 20 Feb 15, 17:16 »
What were your symptoms? And the dive profile that caused it?

Thought I had it as didn't do a deco stop after exceeding Ndl during a trip to Bali last month, but symptoms such as tingling fingers and lethargy only developed 5 days after last dive. Saw the sgh dive physician who ruled DCI out.

Incident has certainly highlighted the importance of dive insurance in case u need the chamber

I thought certain symptoms can present after the fact. Never had DCI but thought i did once or twice. I think i've experienced sub-clinical symptoms. Seem to be a bit more sensitive to it.

but more importantly why'd you exceed NDL and why didn't you do the deco stop?

blondmyth

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Re: DCI, anyone here had it before?
« Reply #11 on: 21 Feb 15, 01:42 »
It was the first time my relatively new dive comp had exceeded NDL and I didn't know the steps to take.

Had alerted my guide about exceeding NDL, and we proceeded to do a deco stop. But strangely after seeing that my dive comp got locked out, he aborted the deco stop and said to surface. Between the both of us, he was the dive professional and so I thought he knew what he was doing. He turned out to be an instructor and it was only through talking to instructor friends back home did I realize what had happened.

It was fortunate that it wasn't DCI in the end though. As to why I exceeded NDL, I would usually check my limits quite often, but I did a lot of dives then, 17 in 6 days, that plus I guessed I had failed to keep an eye on my limits during that dive, only noticing it after I had exceeded NDL
« Last Edit: 21 Feb 15, 01:58 by blondmyth »

Cool79

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Re: DCI, anyone here had it before?
« Reply #12 on: 21 Feb 15, 03:07 »
It was the first time my relatively new dive comp had exceeded NDL and I didn't know the steps to take.

Had alerted my guide about exceeding NDL, and we proceeded to do a deco stop. But strangely after seeing that my dive comp got locked out, he aborted the deco stop and said to surface. Between the both of us, he was the dive professional and so I thought he knew what he was doing. He turned out to be an instructor and it was only through talking to instructor friends back home did I realize what had happened.

It was fortunate that it wasn't DCI in the end though. As to why I exceeded NDL, I would usually check my limits quite often, but I did a lot of dives then, 17 in 6 days, that plus I guessed I had failed to keep an eye on my limits during that dive, only noticing it after I had exceeded NDL

not sure why your instructor asked you to go up and dont complete your deco stop...
you need to complete your deco stop...

Alvin Ho

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Re: DCI, anyone here had it before?
« Reply #13 on: 21 Feb 15, 08:53 »
What were your symptoms? And the dive profile that caused it?

Thought I had it as didn't do a deco stop after exceeding Ndl during a trip to Bali last month, but symptoms such as tingling fingers and lethargy only developed 5 days after last dive. Saw the sgh dive physician who ruled DCI out.

Incident has certainly highlighted the importance of dive insurance in case u need the chamber

If you go google DAN for case incidents, you'll notice a few interesting common themes that the organization is trying to put across.

1) you can get a hit even if you are diving within the limits of your dive computer, even if you are a regular diver and experienced diver, even if you are well rested and follow all the traditional rules or recommendations of safe diving. In other words, DCI can hit anyone at anytime and you should dive as conservatively as you can to reduce risk.

2) If you suspect something is wrong, call a dive physician via the DAN hotline immediately. Don't have to be a member to call. They have a 24 hour hotline and can give sound medical advice through a dive doctor on call. Often in DAN incident reports you have dive professionals (aka dive masters/instructors/dive shop owners) brushing off a diver's concerns as something else, delaying treatment. If anything goes wrong, you want to be breathing O2 ASAP.
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Alvin Ho

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Re: DCI, anyone here had it before?
« Reply #14 on: 21 Feb 15, 08:56 »
It was the first time my relatively new dive comp had exceeded NDL and I didn't know the steps to take.

Had alerted my guide about exceeding NDL, and we proceeded to do a deco stop. But strangely after seeing that my dive comp got locked out, he aborted the deco stop and said to surface. Between the both of us, he was the dive professional and so I thought he knew what he was doing. He turned out to be an instructor and it was only through talking to instructor friends back home did I realize what had happened.

It was fortunate that it wasn't DCI in the end though. As to why I exceeded NDL, I would usually check my limits quite often, but I did a lot of dives then, 17 in 6 days, that plus I guessed I had failed to keep an eye on my limits during that dive, only noticing it after I had exceeded NDL

you should always learn all the functions of a dive computer before going diving with it. If not you might as well not used it. also you should always heed your own training or get more knowledge in diving to make an informed decision yourself. don't let others dictate what you do underwater. it is your life afterall.
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Cool79

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Re: DCI, anyone here had it before?
« Reply #15 on: 21 Feb 15, 12:42 »
If you go google DAN for case incidents, you'll notice a few interesting common themes that the organization is trying to put across.

1) you can get a hit even if you are diving within the limits of your dive computer, even if you are a regular diver and experienced diver, even if you are well rested and follow all the traditional rules or recommendations of safe diving. In other words, DCI can hit anyone at anytime and you should dive as conservatively as you can to reduce risk.

2) If you suspect something is wrong, call a dive physician via the DAN hotline immediately. Don't have to be a member to call. They have a 24 hour hotline and can give sound medical advice through a dive doctor on call. Often in DAN incident reports you have dive professionals (aka dive masters/instructors/dive shop owners) brushing off a diver's concerns as something else, delaying treatment. If anything goes wrong, you want to be breathing O2 ASAP.

what alvin stated is correct.
the recent diving trip i had went, i think i got hit by DCI. and i called DAN to confirm if i got hit. after talking for a while, they suspected i may have got hit with a mild DCI.

as i was a bit dizzy after the diving trip and i was going to take a flight back him.

he also assured me, after i have taken the flight, it has worsen, then faster go n see a dive doc locally.

ended up when i hit singapore, i still feel the same...

so i think it is the LOB after effect... lol

Ryoin82

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Re: DCI, anyone here had it before?
« Reply #16 on: 21 Feb 15, 13:24 »
I also experienced dizziness after boat trips. This can be due to the rocking of the boat. After a day trip, when I am back watching tv in the hotel room, I can feel myself swaying left and right. Not on LOBs though.


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blondmyth

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Re: DCI, anyone here had it before?
« Reply #17 on: 22 Feb 15, 07:12 »
you should always learn all the functions of a dive computer before going diving with it. If not you might as well not used it. also you should always heed your own training or get more knowledge in diving to make an informed decision yourself. don't let others dictate what you do underwater. it is your life afterall.

I agree with learning to use all the functions of a dive comp. after that trip I looked through the dive comp manual again to see what I had missed. Thanks for the advice

limk

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Re: DCI, anyone here had it before?
« Reply #18 on: 22 Feb 15, 09:29 »
Some practical advantageous for learning up the dive com (same applies for camera) before getting into the water:
- less workload/multitasking to 'do stuff', enjoy more, with less time figuring out things and possibly stressing out
>this often can snowball into more and more things, [e.g. beeping com when u just shot up the bag at s/stop then some current comes and your buddy gets swept off] the beeping or problem reading makes more panicky.

- u can proudly announce to your instructor about switching gas to nitrox mode when going for nitrox dive
hahaha

- understanding ('dive education') what breaching NDL means - ie. since you comp is now beeping or warning, you've exceeded the limits due to excess nitrogen in the blood at depth. so? ascent immediately+signal the DM/buddy and go up as per ascent limits and watch your watch closely (er, but not too closely).
one (in my opinion) should avoid using a checklist to point out this is DCI, this is not DCI, etc.

- DCI is more complicated than it seems and ongoing research is still, ongoing. it's all about safety, understanding stuff to your limits and comfort of your holiday and others.

- promoting more dive education - heh heh, u should know never to miss deco stop, esp. if u made a v big breach in NDL, or doing multi day diving in LOB as your NTU is building up over the days (ie. you don't enter the water 'clean' becos of multi diving in 24 hr period). so how? emergency deco procedures can be read up, or, do a course of course..lol. perhaps to interest you, in relation to this could be learning/practice of a) dive com fail, or bottom timer or depth gauge fail scenario, b) breach NDL w/o suff. gas for completing deco, c) communication with surface support when in-water for a) and b), and d) incorrect gas setting for the dive you already in.

- DCI factors include many 'non-dive' things, such as hours of sleep, alcohol intake & time of last intake, food, hydration, diesel fumes, etc..a nice hot coffee/biscuit combo after going down always perks you up
« Last Edit: 22 Feb 15, 09:36 by limk »

Crash

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Re: DCI, anyone here had it before?
« Reply #19 on: 23 Feb 15, 05:01 »
It was the first time my relatively new dive comp had exceeded NDL and I didn't know the steps to take.

Had alerted my guide about exceeding NDL, and we proceeded to do a deco stop. But strangely after seeing that my dive comp got locked out, he aborted the deco stop and said to surface. Between the both of us, he was the dive professional and so I thought he knew what he was doing. He turned out to be an instructor and it was only through talking to instructor friends back home did I realize what had happened.

It was fortunate that it wasn't DCI in the end though. As to why I exceeded NDL, I would usually check my limits quite often, but I did a lot of dives then, 17 in 6 days, that plus I guessed I had failed to keep an eye on my limits during that dive, only noticing it after I had exceeded NDL


what dive comp are you using? very strange that it locked up underwater during the dive when it should switch to deco mode. as far as i know, for suunto dive comps it'll beep if you are nearing your NDL and if you exceed NDL (or even exceed ascent rate) the dive comp will enter deco mode or add a mandatory deco stop on top of the reccomended safety stop. it will instruct you to stay within the displayed depth zone for your deco stop and not break the depth ceiling and floor as displayed on the dive comp. once deco obligation has been performed, you can slowly make an ascent and after which you should not dive anymore for an extended period; best if you breathe in 100% O2 straight away. if symptoms show up, proceed to a local medical centre immediately. do bear in mind that all this deco stops are only viable with enough air in your tank. if you are down to your last few bars and your buddy/dm is nowhere to be seen, then good luck to you.

and like others have mentioned, be very familiar with your dive comp and ALL its functions. since its your personal one, you have no reason for not doing so. read up the manual religously especially the functions that you rarely use or see. if the manual is a hassle to carry along, download the pdf version to your phone so you can read up before your dive trip, in the airport or on the plane; thats what i personally do. you may also wanna read up on deco procedures in the event you exceeded NDL and your comp fails; extra knowledge nice to have. my ssi doppler no deco limits table i got from my owd has a section on it. but more importantly what happend to buddy system? you guys didn't check each other's remaining air and NDL periodically during the dive? or did guys rely that on your dive guide as well?

i'm very curious though as to why the dive guide got you to ascend after you exceeded NDL. its like asking you to drive back home knowing you are completely drunk. the least he could do was to make a safety stop if he wasn't sure. even when we don't exceed NDL we would still do safety stops. might wanna feedback this to your dive club or the Dive centre management. dive safe!
« Last Edit: 23 Feb 15, 05:18 by Crash »