Residual volume fraction during walking using wireless air plethysmography in patients with chronic deep venous disease

Maleti, Oscar; Nicolaides, Andrew; Guerzoni, S; Bergamo, G; Lugli, Marzia

doi:10.1016/j.jvsv.2021.08.014

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…1,5 In these figures, the ejection volume was defined as the bottom of the downward trace caused by the tiptoe movement, while the residual volume was defined as the starting point of refilling, which corresponds to the bottom of the downward bowl-shaped trace following the tiptoe movement in the current study. In other reports 6,7 and the textbook, 4 however, the ejection volume and residual volume were both defined as the bottom of each trace caused by tiptoe movement(s). These differences would result in large differences in the parameters, as demonstrated in the current study, and affect the interpretation of venous hemodynamics.…”

Section: Discussionmentioning

confidence: 99%

Leg volume reduction during tiptoe movement is caused by venous ejection and calf muscle contraction

et al. 2023

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Objectives To clarify the cause of leg volume reduction during tiptoe movement in the standing position. Methods The right legs of 20 participants were assessed. The participants performed tiptoe movement in the supine position, and then stood up and performed the tiptoe movement and ankle dorsiflexion. Leg volume changes were recorded continuously using air plethysmography. Results Differences between leg volume changes due to tiptoe movement and the refilling volumes were not significantly different between the supine (59 mL) and standing (49 mL) positions, indicating that this amount of motion artifact was included in the downward trace recorded by tiptoe movement in the standing position. Conclusions Leg volume reduction during tiptoe movement in the standing position included a significant amount of motion artifacts. Therefore, it may be difficult to accurately measure the ejection volume using tiptoe movement in the standing position.

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