One dead, one missing (since found), 300 foot dive - Lake Michigan

[KathyV]

In the obituary, the family are asking for donations to Bruce's Legacy, the recovery organization, in lieu of flowers:

Obituary for James Havird Winn at Kristan Funeral Home

 

[Marie13]

Sorry if this is a duplicate post but I came across this article about the accident that was published on friday:

Report details Lake Michigan diving accident in which Illinois couple died

Thanks for posting this. It fills in some questions I had about when Jim was notified missing, etc. I find it interesting that the other two divers reported not seeing Jim and Susan during the dive.

 

[broncobowsher]

What caught my eye was the comment about trying to stabilize glucose levels in the hospital before calling deceased. I don't know squat about what happens to the body during this stuff but that is the first time I have ever heard of stabilizing glucose outside of diabetics. Is this something that normally happens in CPR situations? I have zero emergency room experience and no medical training anywhere near this. So I am asking as an idiot about this stuff. This thread has been down enough tangents, I don't see why not ask about this one.

 

[Marie13]

@broncobowsher I was wondering that myself.

 

[KathyV]

What caught my eye was the comment about trying to stabilize glucose levels in the hospital before calling deceased. I don't know squat about what happens to the body during this stuff but that is the first time I have ever heard of stabilizing glucose outside of diabetics. Is this something that normally happens in CPR situations? I have zero emergency room experience and no medical training anywhere near this. So I am asking as an idiot about this stuff. This thread has been down enough tangents, I don't see why not ask about this one.

@broncobowsher I was wondering that myself.

You could post the question in the Diving Medicine forum:
Diving Medicine

 

[Chidiver1]

Willing to bet her glucose levels were too low from hypoglycemia. Glucose is crucial for cellular respiration and the ATP cycle of cellular energy(this is the simple explanation). If she had hypoglycemia that may have been what they thought caused her to be unconscious.

Glucose is especially vital for brain functions as well. That would be my educated guess, as there are a few studies that show administration of dextrose(glucose) during cardiac events doesn't have the best outcome at a not insignificant percentage. I had to remember some relatively recent College biology/nutrition classes. An MD can elaborate far more extensively I'm sure.

 

[beester]

@broncobowsher I was wondering that myself.

And this is where we could have used Lynns elaborate comments :-( Cheers!

 

[Marie13]

And this is where we could have used Lynns elaborate comments :-( Cheers!

 

[beester]

Sure


Not quite.

Based on the rEvo rebreather user manual http://www.revo-rebreathers.com/wp-content/uploads/2016/02/Manual_rEvo_III_CE_2014_v05_ENG.pdf "Work of breathing: at 100m depth, 4° Celsius, 75 RMV (3liter tidal volume), using 2.7kg Sofnolime 797, using any trimix or heliox (PPN2 <= 4.0 bars) <2.45 J/liter in horizontal position and <2.75 in vertical position."

So when scooting the WOB of the unit would have been in the order of 2.45J/L, increasing suddenly to 2.75J/L if the divers went vertical to ascend and swim up the line. Assuming issue with scooter/set. 2.75J/L being the maximum allowed WOB for CE. The exact WOB of the sets for this dive being an unknown variable based on the specific gas density of the divers diluent gas as plumbed in.....
This is assuming that the default DSV wasn't swapped out for a BOV. As certain ones like those by GolemGear/IQsub would as I understand it have significantly increased the sets WOB.

There are rebreathers available that offer near half this WOB, near comparable with the best OC regs. And there are rebreathers available with twice this WOB. Assuming the same trimix/heliox as used on this dive.

Of course that all might be irrelevant noting the 75min scrubber duration the rEvo user manual notes as a limit for 100m 4'C dives.

So what's your point Brad? That the REVO manual states that horizontal vs vertical position doesn't have a significant impact on WOB? I'm happy for you, but how is this relevant, when I'm only trying to say that the WOB on a ccr at that depth and temperature range is higher than diving OC and could possibly (hypothesis) be a cause or in any case contributing factor to the accident that happened.

PS: on the BOV... this is exactly why I'm diving my set without BOV, and use a necklace backup reg to bail out too... almost as fast as BOV (in any case significant faster than deploying a reg from a sidemounted bailout tank), without the increased WOB that a BOV gives.

 

[cerich]

So what's your point Brad? That the REVO manual states that horizontal vs vertical position doesn't have a significant impact on WOB? I'm happy for you, but how is this relevant, when I'm only trying to say that the WOB on a ccr at that depth and temperature range is higher than diving OC and could possibly (hypothesis) be a cause or in any case contributing factor to the accident that happened.

PS: on the BOV... this is exactly why I'm diving my set without BOV, and use a necklace backup reg to bail out too... almost as fast as BOV (in any case significant faster than deploying a reg from a sidemounted bailout tank), without the increased WOB that a BOV gives.

a good read
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https://pdfs.semanticscholar.org/afde/24eec20198e349ca45daa59411ffa15edf03.pdf