This should be required reading for ANY diver thinking about more advanced diving...

[Doppler]

I get to hang out with some really cool people. Neal Pollock is one of them.

Neal is ex-pat Canadian scientist. He’s a research physiologist working in the States, and has a background in zoology, exercise physiology and environmental physiology. He is also a diver and part of his research relates to decompression stress.

His latest blog posting is a great read. Check it out!


https://www.shearwater.com/news/flexible-control-of-decompression-stress/

 

[guyharrisonphoto]

Yes, I saw this in the latest Alert Diver. Very clear explanation and a good read!

 

[kelemvor]

Whenever someone reminds us that decompression is just theory I wonder why no interested party with deep pockets (USN) has actually imaged the bubbles during decompression. Seems like it must be possible with a chamber and an MRI or similar machine.

 

[Doppler]

Whenever someone reminds us that decompression is just theory I wonder why no interested party with deep pockets (USN) has actually imaged the bubbles during decompression. Seems like it must be possible with a chamber and an MRI or similar machine.

Dr. Pollock was showing just that during a recent chat... at least, bubbles in a diver's heart

 

[Storker]

I wonder why no interested party with deep pockets (USN) has actually imaged the bubbles during decompression. Seems like it must be possible with a chamber and an MRI or similar machine.

They're using ultrasound imaging. I guess MRI is a bit slow.

Example: Ultrasound detection of vascular decompression bubbles: The influence of new technology and considerations on bubble load (PDF Download Available)

 

[kelemvor]

Funny they call it "The Doppler Technique". Congrats, Doppler!

 

[Storker]

With all due respect to Steve Lewis, the term predates him with more than a century. https://en.wikipedia.org/wiki/Doppler_effect

 

[tursiops]

Actually, Steve's voice rises in pitch as he gets closer to you. Kind of cool, really.

 

[Michael Guerrero]

Whenever someone reminds us that decompression is just theory I wonder why no interested party with deep pockets (USN) has actually imaged the bubbles during decompression. Seems like it must be possible with a chamber and an MRI or similar machine.

I suspect the U.S. Navy knows enough about the affects of decompression on the human body within the range of operational missions to feel reasonably comfortable with protocol safety.

 

[KevinNM]

I've seen comments from professionals that funding for deco studies has largely dried up due to the shift to ROVs in the oil fields and Navy. SEALs mostly do long shallow operations, the deep salvage and espionage missions were apparently the driving force on research.