My visit to the chamber!!!!

[DIVE BUDDHA]

well ive got to see magret clamp b 4 i go back in the water so i will mention this to her and ask for her opinion on this matter as ive got to have a fullmedical !!!im just gunna take it easy now for the time i will feel is waranted so about 6 weeks i would say and then try a dive after mi medical ?that is if all goes well

[ChrisP]

Hi Leigh

Thanks for posting your story it should serve as a reminder to us all that you can appear to dive within the limits but still get bent. I am glad you got treatment when you did and that you seem to have made a good recovery.
Take time off till you feel better. Give your body time to recover from this.

I don't think I have seen a post about your missed stops but I think I know why your Vyper behaved the way it did.
I have also had several episodes when my Vyper was fine on the dive but on the download showed missed stops. It happened to my mate too and we emailed Suunto about this. When you are diving your computer calculates your dive in real time and constantly updates your no deco / deco times etc. However the profile it records is a sample of your dive - you can set it to record the profile every 10 secs or longer, I set mine to 20 secs. This is what you download to your computer ie: a sample of readings from the dive not the complete dive. Your computer (at home) then recalculates the dive which is of course slightly different from the dive you did. If you dive close to the edge of your no deco times it is easy for the download to show missed stops. Rest assured that the correct profile is the real time one while you are diving and this is also the reason your computer did not freeze you out.
I have no idea whether this is the explanation for your friend.

Why you have dived like this before and not been bent but did this time is open to speculation. But we know that DCI is not easy to predict. Most divers missing a few minutes of deco won't get bent but then someone on another day will after staying within no deco limits. There is more going on than we currently understand. I believe hydration has a major part to play in some peoples bends but you seem to be well aware of that and took precautions.

On the matter of PFOs my advice is that if you had an "undeserved bend" especially if it was a neurological or skin bend, then you should have a PFO test before going back to diving. It does seem odd in your case that you both got bent on the same dive and I don't have an explanation for that. But it would suggest that there was a dive related cause rather than a diver related cause, except that does not seem to be the case. I suppose 3 x 20+m dives going close to no deco limits, some might say is pushing it a little. I have certainly done that myself in the past as many others have too.

Take care of yourself
Regards

[tom]

Originally Posted by ChrisP

I think I know why your Vyper behaved the way it did.
I have also had several episodes when my Vyper was fine on the dive but on the download showed missed stops. It happened to my mate too and we emailed Suunto about this. When you are diving your computer calculates your dive in real time and constantly updates your no deco / deco times etc. However the profile it records is a sample of your dive - you can set it to record the profile every 10 secs or longer, I set mine to 20 secs. This is what you download to your computer ie: a sample of readings from the dive not the complete dive. Your computer (at home) then recalculates the dive which is of course slightly different from the dive you did. If you dive close to the edge of your no deco times it is easy for the download to show missed stops. Rest assured that the correct profile is the real time one while you are diving and this is also the reason your computer did not freeze you out.

Great info - thanks. I've had a dive where I was sure I hadn't exceeded the no-deco limit on the basis of the information I was gettting during the dive, but on downloading the computer (Vyper) at home I found a couple of minutes of stops on the profile (which appeared to have cleared during the ascent anyway). Your explanation is consistent with that and is very useful to know.

Tom

[chrisch]

[quote=ChrisP]
On the matter of PFOs my advice is that if you had an "undeserved bend" especially if it was a neurological or skin bend, then you should have a PFO test before going back to diving.
[/QUOTE

This is a good idea, but just to advise you Leigh that this can take several months and is not easy to get sorted on the NHS. My missus has had the test (negative) and it took us about 9 months to get it through.

Hope you have a better experience than us in getting it sorted. I'm sure Dr Clamp will help you with this matter.

Best

Chris

[Drmike]

Originally Posted by Roobydoo

I second Rubberboy's advice. My Mrs learned to dive recently, and suffered a hit after her AOW course for no apparent reason. The profiles were safe, as were the surface intervals. After 2 treatments in the chamber she was whisked off to a specialist (Dr Wilmshurst - a specialist on this) and found out she had a PFO!

It is not the end of the world, and there are many threads on here that can provide you with more info on PFO, diving post PFO diagnosis, and also on how the PFO can be remedied.

I am glad you and your Bud are safe and recovering well, but would strongly suggest you get checked out for a possible PFO.

Best regards

Steve

Just curious Steve,

Frequent migranes are one sign of PFO - does your wife suffer from them?

Did she show signs of skin rash and a type 2 bend when she took a hit?

Cheers
Mike

[Crisspy Fiver]

I cant help but think that is crap and a totaly bad design. Unless im missing something obvious wich i probably am whats the point of having the computer then?.

So if Yipeedivers mate say has the old Aladin with a fault and his works in this way that would explain things. Yipeediver would be interesting if you could find the model of his computer.

Chris can you PM me some more details as Im a bit lost as to why and how the computer just takes samples of the dive. Do all Sunnto models do this?

Thanks

Jamie (slightly confused!)

[Fathoms Down]

Originally Posted by Crisspy Fiver

I cant help but think that is crap and a totaly bad design. Unless im missing something obvious wich i probably am whats the point of having the computer then?.

The point is that the computer makes calculations every second whereas the log is only based on a sample every 20 seconds or so. As you dive the computer rather than the log this is a way of getting a rough idea of what the dive was like without having to pack the computer full of RAM in order to collect the full telemetry (sp?). Yes, its a bit poo but I'd rather have that than a computer which costs hundreds of pounds more and is the size of a house brick for something which doesn't make the dive I'm doing at the time any safer.

[Noel Johnson]

Hell fire, Food for thought there I feel... Glad to hear you're on the mend now though Leigh.

[Janos]

Originally Posted by Crisspy Fiver

he model of his computer.

Chris can you PM me some more details as Im a bit lost as to why and how the computer just takes samples of the dive. Do all Sunnto models do this?

Basically the Vytec just stores the data at intervals. IIRC you can set this to every 10 seconds, every 30 seconds, or every minute or something like that. If you set it to store data every minute you can store 6 x more dive profiles in the the memory compared to if you set it every 10 seconds.

Just suppose you're on the bottom, and your computer is set to record data every minute. At 10:30 precisely it records your depth and time, and then 1 second later you ascend. When you get back to your home PC, it will think that you've started to ascend 59 seconds later then you actually did, at 10:31.

The Vytec only stores depth at a particular time - it doesn't store the tissue loadings. These are re-calculated on your home PC, and so what is displayed on your home PC can be slightly different to what actually went on during your dive. But only by (max) a minute. I can't see this making the difference between a non-deco dive and several minutes of stops.

Laters,
Janos

[jptaylor9]