title: Stereophotogrammetric analysis of changes in body volume associated with the induction of anaesthesia.
abstract: Changes in the volume of the trunk were measured in seven supine patients, when anaesthesia was induced with thiopentone i.v. Stereo-photograms were taken before and after induction and measurements of volume calculated from contour plots of a reconstructed stereo image. The changes in volume of the visible part of the trunk were between -846 and +505 ml. No systematic change in total or lower trunk ("abdominal") volume was evident, but there was a significant negative linear relationship (r = -0.87) between upper trunk ("ribcage") volume change and obesity (expressed as actual weight/expected weight). Changes in volume were more evident in the upper parts of the supine subject, in both ribcage and abdomen (P less than 0.05).
mesh_terms: D000328:Adult; D000368:Aged; D000771:Anesthesia, Intravenous; D001824:Body Constitution; D001830:Body Surface Area; D001835:Body Weight; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010780:Photogrammetry; D010781:Photography