title: Ambulatory strain-gauge plethysmography and blood volume scintimetry for quantitative assessment of venous insufficiency.
abstract: In the present study, a strain-guage plethysmographic method (ASGP) is compared to an isotope plethysmographic method (ABVS), in order to evaluate how an externally recorded volume change corresponds to blood displacement within the leg during exercise. The coefficient of correlation for RT (venous return time) was 0.67 (P less than 0.001) and for EV (expelled volume) it was 0.61 (P less than 0.001). The RT values were similar by the two methods both in healthy controls and in patients with Chronic Venous Insufficiency (CVI). The corresponding EV values showed the same pattern in controls and patients but the values differed substantially. By ASGP the value was approximately 2 ml per 100 ml tissue compared to 33 ml per 100 ml blood by the ABVS method. Both methods could clearly distinguish normal controls from patients with chronic deep venous insufficiency, but ABVS could only make this distinction when the ankle area of measurement was applied.
authors.affiliation: Department of Vascular Surgery, Gentofte Hospital, University of Copenhagen, Denmark.
authors.forename: J R
authors.initials: JR
authors.lastname: Struckmann
authors.forename: S F
authors.initials: SF
authors.lastname: Vissing
authors.forename: E
authors.initials: E
authors.lastname: Hjortsø
mesh_terms: D000328:Adult; D000368:Aged; D001810:Blood Volume; D005069:Evaluation Studies as Topic; D015444:Exercise / Q000502:physiology; D005260:Female; D006801:Humans; D007866:Leg / Q000098:blood supply; D008297:Male; D008875:Middle Aged; D010991:Plethysmography / Q000379:methods*; D011877:Radionuclide Imaging; D013670:Sodium Pertechnetate Tc 99m; D014689:Venous Insufficiency / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000503:physiopathology
chemical_list: D013670:Sodium Pertechnetate Tc 99m