Bent on New Year

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maristu

Registered
Messages
22
Reaction score
11
Location
Brazil
# of dives
200 - 499
So… I've been doing my dive master training here in Thailand since November, and it's been great. My instructor is a trip leader on a liveaboard to the Similan islands, which means that most of my training has happened on the boat. I've done 87 dives so far during my DMT, and gained a LOT of experience, which is what I wanted. The diving's great, the crew is awesome, and I really can't complain…

Our liveaboards are 4D/4N, with 4 dives on the first 3 days, and 2 on the last day. The first two dives of the day have a max allowed depth of 30m, the third dive is 25m and the last is 20m. We usually have 2-3 hours of surface interval between dives. This was my second trip actually guiding people by myself, the first was during Christmas, I had two open water divers and did most of the dives with max depth of 18m. The New Year trip wasn't much different, I started off with two open water divers, but then in the middle had to rearrange groups because one of the instructors ruptured her eardrum, so for the last two days I had 4 advanced divers. Still, all the dives were nice and calm (for the most part) and I was nowhere near my deco limit in any of them.

On the first day of the liveaboard (December 29), we did two rescue scenarios in between dives (with a 45 min si), quick dives of about 2 minutes, bringing up an "unconscious" diver from about 7 meters. I also did my 100m tow that day, and decided to skip the night dive since neither of my divers wanted to dive and I was tired…

Second day was calm enough, my divers didn't want to dive the first dive so I went with another group for a fun dive. I also skipped the last dive of the day (again, my divers didn't want to dive… Go figure) and ended up missing a whale shark! Boo :-(

Third day I got my new group, so the dives were a bit deeper, but still no deeper than 25 meters. The last dive of the day was supposed to be a sunset dive, but we ran a bit late and ended up doing a half-night dive. The place we were at (Tachai Pinnacle) isn't really the best place for a night dive, as there can be a lot of current and it's a bit too deep (top of the pinnacle is at 14m, and you kind of have to go deeper to get protection from the current). I told my instructor that I wasn't comfortable guiding at this site at night (for some reason it's the site I have the most trouble with, even during the day), so he got someone else to lead my group and I went as an assistant. There was a LOT of current, and I was very nervous, not to mention tired from having to swim against the current to GET to the pinnacle, and then to get to the mooring line. Safety stop was pretty long (about 8 minutes, as the line was very congested). At the end, we let go of the line and let the current take us to the side of the boat. With the current and darkness, I got disoriented and ended up popping to the surface a bit faster than I should have (I think… I didn't even realize I was going up until I got to the surface). We got out of the water at around 7:15pm.

That night was new years, and we had a party on the boat. I did drink, but not much, and not nearly as much as everyone else on the boat (I'm not much of a drinker). Maybe two Sangsom cokes and a beer. Went to sleep at around 2am.

On the last day, we got up at around 7am. I felt crappy, which I wrote off as a hangover. I drank a full bottle of water with electrolytes before our first dive, and another one between dives. On the last day we dive at the Boonsung Wreck, which is a nice quiet dive, with sandy bottom at 18 meters. After the first dive, I started feeling soreness on my ribcage (center to right side), which I thought was due to sleeping in a bad position, or even from the mooring line on the previous day. After the second dive, when we were heading back to port, I started feeling some pain on my right thigh, as if I'd hit something hard and bruised it (no visible bruise, though). It got more and more painful (and a bigger area as well), and by the time we got to mainland just the fabric from my pants touching my thigh was painful. At that point, I actually asked two instructors if this could possibly be DCS, and both said they'd never seen symptoms like these for DCS. On the way back to the shop, I started feeling the exact same thing on my left thigh, and that's when I felt sure that something was wrong (there was no way I could have bruised both thighs and not have noticed). Up until this point, there wasn't a rash (I kept checking), but when I got to the shop, a red rash had shown up on my chest, around the area where I felt the bruised rib, all the way down to my stomach. This was around 4pm. The shop called the chamber, and I laid down on the floor of the shop to wait for the ambulance. There was no oxygen on the shop (we called around and none of the shops had it), so I only got on oxygen when the ambulance arrived, at around 4:30pm.

Got to Phuket hospital at around 6:00pm, and was greeted by the lovely doctors from the chamber, who performed a neurological exam (I think that went fine, except for the balance part, but I reminded them that I had been on a boat for 4 days, and also that I'm not the most balanced person in general… I've been known to fall off stationary bikes ;-) ). There was no doubt that I was bent, and I learned that the place where the rib meets the sternum is considered a joint (if I'd known that before, I would've gotten on oxygen on the boat and not done the second dive at all). I was also dehydrated, so they put me on an IV and got me to my first chamber session… 5 hours (table 6, I think?), with two extensions, so I got out at 2am. Slept at the hospital, and went in for another, shorter session the next day (3 hours). Slept at the hospital AGAIN (what a great way to kick off the New Year!), and was discharged the next day. All symptoms were gone (as well as a couple other cuts and bruises from before, and a big jellyfish rash on my hand :) )

So… I'm not allowed to dive until the 31st, which people tell me isn't all that bad. I'm heading back to Phuket in a couple of days to get checked out by the chamber doctor. They told me that although my profile for that trip was pretty conservative (I think the deepest dive was 25 meters and the closest I got to my NDL was about 10 minutes on my suunto d6i), because of the dehydration and lack of sleep, they don't consider it entirely undeserved. According to them, the rescue scenarios didn't help, nor did the coming up too fast from the safety stop on Tachai, but that none of these things by themselves should have gotten me bent. So in their opinion, it was a combination of everything.

And now… I'm scared. I'm really scared of getting bent again. I wish there HAD been something very specific that had happened and that was definitely to blame. Being tired and not sleeping a lot is part of the job description… I did three liveaboards back to back at the beginning of the season, without skipping a dive, and I was dead by the end of it. This is the rhythm here, and this is where I want to work. And once I get instructor (next season, probably), there will be rescue scenarios that will need to be done in between dives, and search and recovery, and PPB and navigation and lots of other things. There will be pool sessions in between liveaboards. It'll be much harder, I believe. So if I got bent just during my training, how the hell am I gonna be able to work as an instructor?

This is what's been going through my mind these past weeks, while I wait for January 31st to arrive… I'm worried and scared that I might never be able to dive again. I'm scared that if I get bent again, it'll be worse. I have almost 200 dives at the moment (110 in one year, and the other 86 in the past 2 months), and I've never had any problems… Until now.

I would like to know your opinion… Was it undeserved? Is there anything I should do? People have told me to set my computer to a more conservative setting, and to dive on Nitrox on an air profile, but for work that's not always possible. I would also love to hear people's experiences with DCS, and with getting back to diving afterwards… Any help will be much appreciated.

Sorry for the long post, but I did want to put as much information in there as possible so you got a clear picture of what happened. Thanks for reading!

Mariana
 
It does sound 'undeserved' as I expect many DMTs who train in the South East Asian environment would have been through similar exposure. I include myself in this.

However it is also well recognised that diving within ND limits is no guarantee of protection. As the basis of our dive tables came from data off US Navy divers, one thought I use (although probably not scientific) when judging events is how closely an individual's physical or physiological profile fits with that of a Navy Diver.

If you think you might be some way off, then perhaps the suggestion of diving more conservatively or more with Nitrox may be among your limited options if indeed you want to pursue a career in this field.

Dehydration is perhaps one variable that does not come with the job description.

I wish you every success in achieving your goals, whether you decide to keep or change them.


Sent from my iPhone using Tapatalk
 
multi day diving followed by a rapid ascent from a pinnacle dive.?

dcs roulette.
 
Have you thought of the possibility of having a PFO. My wife and I do a lot of diving and when we go overseas will dive daily for several days multi dives. She has been bent now 3 times for no apparent reason. All dives are conservative and we ensure correct rates or ascent and all stops met plus more. All other divers weren't affected.

The short of it was after the third time, I took her through the painful process of getting checked for a PFO. I say painful due to the obstruction by GP's (normal doctors) who know little about diving but seem to always think their word is god and they know everything and of course it wouldn't be a PFO.

She has a reasonably large hole and it will be fixed in 8 weeks time. While we were diving the Coolidge last year we related this to a fellow diver there and he said he had eye sight issues, and perhaps this might be a PFO as well. Personally I thought this was a bit far fetched and it might be something else, however on him being checked, he has a number of holes which have now been fixed.

The short of it is that if your diving doesn't seem to be risky or with stupid errors, then I would consider and be checked for a PFO and have it ruled out. Around 25% of the population have a PFO so you might be the 1 in 4. If so it can be fixed and hopefully your risk of a DCS reduced.
 
Greenjuice, I'm definitely not even close to a Navy diver's conditioning, although I'm currently in the best physical shape I've ever been in. But I've set my computer's personal setting to 1, and am teaching myself to drink tons of water every day... We'll see how it goes :)

mala, just to be clear, the rapid ascent was from around 2.5 meters, which is where I was on the line by the time everyone in our group finished their safety stops (mine ended up being around 8 minutes, as we slowly moved up the line). So although it was way faster than my normal rate (which is sloooow, as I reel in my SMB), I was already practically on the surface, so much so that my computer didn't even beep. But who knows, maybe even that could have been the "straw that broke the camel's back"... Lesson learned, I'll have to work on my orientation during night dives. I also need to learn to relax in strong currents, but that's a whole other story...

Peter, I have looked into PFO, but currently don't have the money to get that checked. When I get back to Brazil after the season is over, I can do it and have it covered by my health insurance, but as it's not a "needed" exam, my travel insurance won't cover it (luckily, it covered all my chamber and hospital expenses). I did do a heart doppler before I came - I have hypothyroidism, and some dive shops have requested a full heart checkup because of it, even though I've explained a million times that it's HYPERthyroidism that can give you heart problems, and the hypo only makes you tired if you don't take your medication in the morning (and yes, I've looked into it, there's no relation between DCS and hypothyroidism that I could find). But to avoid any arguments, I decided to do a full heart checkup, with ECG, doppler and a stress test, and everything came out perfectly normal. I do know that PFO won't necessarily show up unless you're actively looking for it, but I have none of the other symptoms, such as arrhythmia or murmur. So hopefully I'm ok on that front... I will get it checked out as soon as I have my health insurance back, though.

Thanks for all the comments!

Mariana
 
Greenjuice, I'm definitely not even close to a Navy diver's conditioning, although I'm currently in the best physical shape I've ever been in. But I've set my computer's personal setting to 1, and am teaching myself to drink tons of water every day... We'll see how it goes :)

mala, just to be clear, the rapid ascent was from around 2.5 meters, which is where I was on the line by the time everyone in our group finished their safety stops (mine ended up being around 8 minutes, as we slowly moved up the line). So although it was way faster than my normal rate (which is sloooow, as I reel in my SMB), I was already practically on the surface, so much so that my computer didn't even beep. But who knows, maybe even that could have been the "straw that broke the camel's back"... Lesson learned, I'll have to work on my orientation during night dives. I also need to learn to relax in strong currents, but that's a whole other story...

Peter, I have looked into PFO, but currently don't have the money to get that checked. When I get back to Brazil after the season is over, I can do it and have it covered by my health insurance, but as it's not a "needed" exam, my travel insurance won't cover it (luckily, it covered all my chamber and hospital expenses). I did do a heart doppler before I came - I have hypothyroidism, and some dive shops have requested a full heart checkup because of it, even though I've explained a million times that it's HYPERthyroidism that can give you heart problems, and the hypo only makes you tired if you don't take your medication in the morning (and yes, I've looked into it, there's no relation between DCS and hypothyroidism that I could find). But to avoid any arguments, I decided to do a full heart checkup, with ECG, doppler and a stress test, and everything came out perfectly normal. I do know that PFO won't necessarily show up unless you're actively looking for it, but I have none of the other symptoms, such as arrhythmia or murmur. So hopefully I'm ok on that front... I will get it checked out as soon as I have my health insurance back, though.

Thanks for all the comments!

Mariana

Mariana,

When you get it done you have to get a stress echocardiogram with bubble test. When my wife had her ultrasound of her heart from the front, it showed nothing when they squirted the frothy blood into her heart while doing an ultrasound, one chamber showed a mass of white bubbles, the other side nothing. Then he asked her to bear down like having a baby when he shot in the bubbles, and there it was, a small stream of bubbles crossing over into the other chamber. Thus the reason why she could do deco diving and normal diving and usually get away with it, but put herself under stress with a system full of bubbles and some leak across (like lifting twin cylinders etc). they then did a Transesophageal echocardiogram by putting the ultrasound down her throat so closer to the heart and he then said the hole is bigger than first thought although it wasn't apparent where it exactly was.

The reason I mention the specific test is that when we went to the GP, she wanted to just do an EKG, and I told her it was a waste of time. She was embarrassed that she knew little about diving medicine and became nasty. We saw another GP and although she admitted knowing little about dive medicine, she referred us to the correct specialist and we went from there. Many GP's have no real idea and the bad ones don't wish to show their ignorance so seem to attack or ignore your plee's. Anyway I do hope you can resolve this and continue diving into the future, please keep in touch and let me know how you go as I am very interested in this issue and your personal outcome.
 
PFO is certainly a consideration in any 'undeserved' hit. But don't be upset if you don't get referred for testing.

There is a recent (2013) review article in one of our medical rags providing guidance to physicians on when to refer for testing. You can download the free PDF from here:

http://www.extremephysiolmed.com/content/2/1/10

Your physician may decide with you that the criteria for referral may not be satisfied. Be aware that the gold standard test of transoesophageal echo is not very pleasant. Do tests when you are informed about what the results might mean and when you are prepared to act on them. I think the article covers that well.
 
I believe the PFO angle might be important. However, you need to limit your nitrogen exposure in your up coming dives. Shorter dive times, shallower dive depths, more surface interval, less stress ( low workload ) and nitrox.

Did you use nitrox on all of your dives?
 
I believe the PFO angle might be important. However, you need to limit your nitrogen exposure in your up coming dives. Shorter dive times, shallower dive depths, more surface interval, less stress ( low workload ) and nitrox.

Did you use nitrox on all of your dives?

Hey OP,

Beaverdivers probably has some good advice. Although, IANAMD!

I can rationalize and project though. For me, a hangover feeling is usually caused by dehydration. This can be brought about by a relatively small intake of alcohol the evening before. I have found that if I have a 500ml bottle (or glass) of water after every drink, I don't feel "hungover" the next morning. I assume you drank a 500ml bottle of water before diving. I drink twice that before I leave the house when I am not diving, and no less when I am diving.

I always use nitrox to shave the odds; even though we dive air profiles. I drink enough water to urinate at every surface interval--keep shaving those odds. What was your sodium intake the evening before? Did you eat lots of chips and salsa? Bar food? All salty stuff.

In my book, all hits are deserved because the study of physiology is not an exact science; also, NDL diving is decompression diving. If you are playing the game, don't be alarmed if you get a minor case of the bends even though you followed the "rules." If you ask the question: Could this symptom be DCS? You should be on oxygen.

An iteration: IANAMD!!!!! I don't know sh**t about this stuff (nor do the experts really, otherwise the experts would have given you a CODCS (Cause Of DCS, confirmed!).

Projection and rationalization is OK if you are aware that you are doing it (I hope?).

markm
 
Correct! Stay Hydrated.

If I am not peeing on every dive, then I'm not properly hydrated! ( You don't have to pee during the whole dive :D )

Agreed! If you think you might have the bends, then get O2.

Also, Ascend Slowly even in the final 10'/3 meters.
 
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