Thanks for comments everyone. Some answers to questions:
To Schford:
I started to feel that something is going wrong, but I did not think that it wassO2 issue. The symptom was so odd, diaphgram contractions. I also had a reg attached to my dil-tank under my chin, but I made the decision not to use it. The reason was that I could not be sure that the dil-gas was ok. I decided to switch to the EAN50 bail-out stage that I was carrying.
About the ppO2:
My unit is a classic YBOD and 4th cell connected to VR3. I am convinced that the ppO2 never went over 1,3 during the dive. The 4th cell was during the dive 2,5 months old and the three YBOD cells about 11 months old.
The YBOD cells still react nicely and I can reach 1,55-1,6 when I do an oxygen flush at 6m and the unit is calibrated using O2% of 98%.
I can attach VR3 ppO2 graph from the dive and I think I have also the dive profile somewhere.
To DrMike:
I started diving 2,5 weeks after the incident. The first dive was quite horrible. I was a bit paranoid throuhout the dive
But I went back to water again the next day. Now I amdiving basically the same way as earlier, but I use lower ppO2 all the time. I now use 1,1 and depending on the dive also O2 flushes if it is needed during 6m stop.
I am now even more meticulous about team work during dives. I won`t accept that dive team members just wonder around while in deco. They need to stick together and be aware all the time. Full face mask could be nice to prevent drowning if you get hit. I was wise and did not start breathing while under water
That is why I got only a small amount of water in my lungs.
My VR3 had around 100mins of deco left when the convulsion started. Our plan was cut with vplanner and according to that plan I had around 50 mins of deco left. The dives average depth was 41,3 meters.
I have been thinking if the medicine I used had some sort of influence to the hit. I had placed a Scopolamin patch (used to prevent sea sickness) behind my ear a day earlier. I also had taken one Aerius antihistamine tablet the same day. I had used scopolamin earlier and also Aerius without any problems. It is impossible to say did they influence to the hit or not, but for sure I am not using those again if I am doing deeper dives.
You can see the dive profiles from my site:
www.hut.fi/~jhaaja/dive-profiles.pdf
The ppO2 graph:
I really can thank my dive partner for saving my life. He was diving OC and also had the same amount of deco left. He brought me to surface and then went back and started the deco scedule from 15m again. Also the surface crew was very efficient and that also helped to save me. And finnish Coast guards Super-Puma helicopter is also quite handy tool for sea rescue
