Intended primarily for spirometry, some versions came with a helium analyzer and could be used to measure lung volumes. Taken from: http://bid.mclemoreauction.com/cgi-bin/mnarclist.cgi?mclemore/20081028/category/LAB-AND-MEDICAL-EQUIPMENT
Intended primarily for spirometry, some versions came with a helium analyzer and could be used to measure lung volumes. Taken from: http://bid.mclemoreauction.com/cgi-bin/mnarclist.cgi?mclemore/20081028/category/LAB-AND-MEDICAL-EQUIPMENT