vertigo at depth

[eelpout]

I have been diving for over 30 years and in the last few years I have experienced vertigo while underwater. It usually happens on ascent. It lasts about 5-10 seconds but makes me feel uncomfortable while I am doing my decompression stops. This past weekend I was planning a deco-Trimix dive to 210" and I got vertigo on the way down from 130' -160'. I called the dive and on ascnet it came back twice , once at 140' and once at 100'. Dving is my profession need advice.
Thanks in advance!
Jim

 

[Dr Deco]

Hello eelpout:

Problems associated with vertigo during ascent or descent are very often associated with alternobaric vertigo. It is an issue with unequal pressure within the right and left middle ears.

Slowing the pressure change and equalizing should help this condiciton. It is not an issue of DCS.

Dr Deco :doctor:

Readers, please note the next class in Decompression Physiology is September 10 – 11, 2005 :1book:
http://wrigley.usc.edu/hyperbaric/advdeco.htm