Lots of new members (including me) which is great, but not much happeneing in the T2T forum... so I thought I'd post a discussion thread
It's common to hear people talk about "undeserved" DCS hits - I know of several people who have gotten bent on rec. dives that were well within NDLs for example, with multiple divers following the same basic profile and only one getting a (type 1) hit
For example, there's a thread currently in Diving Medicine (just got moved there) about an OW diver getting bent during/straight after her course, on what sound like fairly benign dives and flying 24+ hours later
When one hears these stories, it typically goes something ike this (in my experience anyway) : Diver A did a dive, followed "all the rules" and got bent but no-one else on the same dive did, and Diver A has done the same dive/profile before X times and never had any problems
My thoughts (and they are nothing more than that) are:
1. Deco/preventing DCS is - currently anyway - an art not a science
2. We don't know what the "rules" are
3. The actual "rules" (unknown) cover pre- and post-dive, not just in-dive eg hydration and rest before the dive, not doing X after a dive etc
So my point is that I don't think there are "undeserved" hits, just unknown rules that Diver A didn't follow - or that perhaps while they followed the "in-dive" rules (not exceeding MOD, PPO2 limits, ascent rates, NDLs) they didn't follow the pre- or post-dive rules (whatever they may be, but including point 3 above and no-fly, no excercise/hot showers (debatable) etc
Do you agree, or do you think I am just trying to rationalise in the hope that I will never experience an "undeserved" hit?
I think it's agreed that multiple dives over several days put you outside of prevalent deco theory ie tables, is that the reason for these hits?
I've heard that PADI DMs are a high risk group due to the above and also frequent sawtooth profiles looking after students/guests, is that factor? It's been said by some on SB.com that dive professionals are statistically going to get hit eventually, is that true in your view, or can it be avoided?
Please quote some examples of divers you know of who got an "undeserved" hit and why you think it falls into that category
The above examples refer mainly to non-tech profiles, so feel free to expand it into the tech/deco realm - the basic premise of "undeserved" remains the same
On a related topic, have you ever been bent, and why?
It's common to hear people talk about "undeserved" DCS hits - I know of several people who have gotten bent on rec. dives that were well within NDLs for example, with multiple divers following the same basic profile and only one getting a (type 1) hit
For example, there's a thread currently in Diving Medicine (just got moved there) about an OW diver getting bent during/straight after her course, on what sound like fairly benign dives and flying 24+ hours later
When one hears these stories, it typically goes something ike this (in my experience anyway) : Diver A did a dive, followed "all the rules" and got bent but no-one else on the same dive did, and Diver A has done the same dive/profile before X times and never had any problems
My thoughts (and they are nothing more than that) are:
1. Deco/preventing DCS is - currently anyway - an art not a science
2. We don't know what the "rules" are
3. The actual "rules" (unknown) cover pre- and post-dive, not just in-dive eg hydration and rest before the dive, not doing X after a dive etc
So my point is that I don't think there are "undeserved" hits, just unknown rules that Diver A didn't follow - or that perhaps while they followed the "in-dive" rules (not exceeding MOD, PPO2 limits, ascent rates, NDLs) they didn't follow the pre- or post-dive rules (whatever they may be, but including point 3 above and no-fly, no excercise/hot showers (debatable) etc
Do you agree, or do you think I am just trying to rationalise in the hope that I will never experience an "undeserved" hit?
I think it's agreed that multiple dives over several days put you outside of prevalent deco theory ie tables, is that the reason for these hits?
I've heard that PADI DMs are a high risk group due to the above and also frequent sawtooth profiles looking after students/guests, is that factor? It's been said by some on SB.com that dive professionals are statistically going to get hit eventually, is that true in your view, or can it be avoided?
Please quote some examples of divers you know of who got an "undeserved" hit and why you think it falls into that category
The above examples refer mainly to non-tech profiles, so feel free to expand it into the tech/deco realm - the basic premise of "undeserved" remains the same
On a related topic, have you ever been bent, and why?