JonG1
Contributor
Question for boulderjohn do u suffer with sea sickness at all
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But with a PFO bubbles can bypass the lungs and end up on the arterial side so even if they are micro and would have been sub clinical the risk is increased of damage.
You are right, but you are wrong on whatever your rish factors are. The navy exceptional exposure tables accept a 3% risk of DCS, and thats for younger and exceptionally fit navy divers with a BMI and age much lower than the general diving public. Technical dives are often "balls to the wall" and the only reason we get away with them is because we learned over years of technical diving what works for us, instead of the total knowledge that a trimix instructor with less than 10 trimix dives to his credit can give us in a weekend course. I despise rec>tec instructors and am very happy that I got my instruction over the years from some of the very best instead of from those who decided that learning how to teach tec is a great way to put food on the table when the pool of rec students isn't keeping you fed.Russian roulette has a risk of 1 in 6, right? Even if one blankly buys the famous factor of 4 greater DCS risk with a PFO, it is still less than 1 in 1000. And a chamber ride will not fix a bullethole in the head. This comparison is misguided.
No, they really talk about technical diving. Most sportsdivers/recreational divers don't have access to pure oxygen. So it is really better to do surface oxygen than to get it tested or closed. I have the article at home. And I am sure they talk about technical diving and not about recreaional diving (the magazine is 95% for technical divers).Sure a closure is still a risk, and the dangers of any elective surgery have to be carefully assessed. For several buddies and others tec divers that I have spoken to over the last 20 years, the risks were worth it, and they are quite happy with the result.
As far as the people who have died while having their PFO fixed, I have neither heard about them nor do I know any of them.
I remember a Tec Instructor at Lake Garda years ago, who after several DCS 2 incidents had a PFO test (TEE) done and had her PFO fixed only to find out the hard way several months later, that she also had a shunt in her lungs.
Haven't heard about her doing any further diving in the last 15 years since the shunt diagnosis.
Instead of doing TEEs as the gold standard, for detecting a right-left cardial shunt, why don't we do Trancranial Dopplers (TCD), again with the shaken bag of 0.9% NaCl - that way we would detect the presence of any shunt in a much less invasive manner than the TEE and it's a lot cheaper since any doctor (probably including a doctor of literature) with an 8 or 10Mhz doppler can do it.
Surface O2 is a treatment form somewhere between Chamber, IWR, and sleeping off the minor pains of a mild DCS. It's usefull, but if you have a significant DCS2 bend you will still need other treatment in addition to surface O2. I really believe that that article in Wetnotes was written for their main customer base of teaching recreational instructors/divemasters and has nothing to do with those of us who are doing 3+ hour dives deeper than 90M.
Michael
Not at all.Question for boulderjohn do u suffer with sea sickness at all
In our operation we only keep records for 1 year then destroy them, so I can only give my impression on what happens at Bikini over 9 years and thousands of logged man dives. The answer is no, there are not fewer unexplained hits on RB. Again, only my impression, but I think the computer algos give you full credit for the optimal PPo2 so that safety buffer is eliminated. Coupled with the typically longer run times on rb, the higher exposure results in slightly more incidence of DCS.Does anyone know if there are fewer unexplained hits on RBs in comparison with OC given the optimisation of ppo2 across the dive.
I haven't got a clue what I would do differently in the future.