CCR snoring

[Marcin]

I wonder whether any of you have encountered a following problem: some seven years ago, in 2018 or 2017, after deep dives, during the final decompression stops, I started having occasional breathing problems. It manifested as a snoring—I felt breathing resistance increased and produced a snoring sound. Nowadays, it occurs even on shallow dives, after just 15 minutes, more quickly in warm water than in cold water. This phenomenon doesn't occur at all in OC diving, and in CCR diving it disappears after switching to bailout. I'm curious if any of you heve ever heard of such a phenomenon.

 

[Philfy]

Hello there
Hopefully I'm not repeating already acquired knowledge. There's sort of two parts to what I think is occurring. The first part is the basic mechanics of how a RB works.

This issue may be caused by the increased WOB on a CCR, versus the decreased effort on OC due to the positive pressure of gas flow from a 2nd stage. When we use a RB we have to create a negative/positive pressure in the loop, to move the gas around the loop and through the scrubber. There will be resistance, or increased WOB.

The 2nd part is what your particular nasopharyngeal airways look like. There may be tissue that vibrates during inhale/exhale (positive/negative) as the shape of you nasopharyngeal airway changes with increased pressure, causing the snoring sound.

Best to consult an ENT or hyperbaric doctor. I have heard of laryngeal spasm due to remarkably increased WOB.