Deep bounce dive crushes micro bubbles?

[Bubbletrubble]

Interesting discussion. However, I'm having difficulty accepting the biological relevance of bubble growth in agarose. Human tissues (and even extracellular matrices, for that matter) are far more complex than the mesh-like matrix of agarose gel.

 

[AzAtty]

Sections 10.9-10.11 in Basic Decompression Theory and Application discuss the idea. They state that micronuclei tend to collapse in on themselves below a certain critical radius. Assuming the nucleation process is heterogenous (parent medium and micronuclei content are different), then nucleation and denucleation (crushing) can occur with modest pressure changes (tenths of atmospheres). When a supersaturated, denucleated solution is decompressed, it requires a much higher degree of supersaturation to induce bubble formation.

Wienke suggests that a conservative deep dive followed by a sufficient surface interval should IN PRINCIPAL crush micronuclei and reduce the number potentially excited into growth during decompression.

However, I don't see anything indicating that Wienke recommends a deep spike followed by an ascent to planned depth, although I suppose that may be a conclusion some have drawn and put into practice.

 

[LiteHedded]

sounds like a cheap way to do a PFO test

 

[Diver0001]

Here are two articles I found that bear some relevance:

Rubicon Research Repository: Item 123456789/5325

Rubicon Research Repository: Item 123456789/5076

I wonder what they meant by "rapid" in the first article... if it's something that could reasonably be executed by a diver or not...

In any event it gives me a "you first" feeling.

R..

 

[Scott L]

As I alluded to earlier, how often does a planned dive have 3 atm or more of depth below it to use for this purpose?

 

[Cave Diver]

As I alluded to earlier, how often does a planned dive have 3 atm or more of depth below it to use for this purpose?

The only instance that comes immediately to mind would be a wall dive.

 

[Scott L]

The only instance that comes immediately to mind would be a wall dive.

I am sure this practice will be added to the resort diver curiculum in the Cayman Islands soon. All joking aside, all such discussions are very interesting and appreciated by this poster...

 

[Garth]

OK times up, i'm going back to basic scuba discussions... I'll see you in a few years

 

[limeyx]

As I alluded to earlier, how often does a planned dive have 3 atm or more of depth below it to use for this purpose?

Shovel?

 

[Gilldiver]

sounds like a cheap way to do a PFO test

You don't need a PFO, if not done right and the bubbles get just a bit bigger this would be a great way to take them from the venous side of the lungs and send them right to the heart and brain on the arterial side.

The old WKPP "Why we don't bounce dive" explanation.