Strain-gauge versus water plethysmography description of simplified systems and analysis of differences and accuracy
Research output: Contribution to journal › Journal article › Research › peer-review
Poul-Erik Paulev, Flemming Neumann, Steen Levin Nielsen, Niels Keiding
Recently developed water and strain-gauge plethysmographs are compared on the same forearm. They do not differ systematically in absolute blood-flow values at different steady-state levels, provided that the strain gauge is applied at the middle, muscular, part of the forearm. The accuracy of the water and strain-gauge plethysmograph is identical, and the two instruments closely follow random variations in blood flow. The water plethysmograph is a reliable integrator of blood flow in a segment of a limb, and the strain-gauge described here can be used as an adequate substitute, when placed in the middle of the limb segment examined. However, the results from the strain-gauge plethysmograph are dependent on the actual location of the strain gauge.
|Journal||Medical & Biological Engineering|
|Number of pages||9|
|Publication status||Published - Jul 1974|
- forearm blood flow, strain-gauge plethysmograph, Venous occlusion plethysmography, water plethysmograph