hypobarism

[hī′pə-bărĭz′əm]
n.
  1. Dysbarism resulting from greater gas pressure within the body than in the surrounding medium, so that gas in body cavities tends to expand and gases dissolved in body fluids tend to come out of solution as bubbles.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.