title: Leg blood flow measurements using venous occlusion plethysmography during head-up tilt.
abstract: We tested whether venous occlusion plethysmography (VOP) is an appropriate method to measure calf blood flow (CBF) during head-up tilt (HUT). CBF measured with VOP was compared with superficial femoral artery blood flow as measured by Doppler ultrasound during incremental tilt angles. Measurements of both methods correlated well (r = 0.86). Reproducibility of VOP was fair in supine position and 30 degrees HUT (CV: 11%-15%). This indicates that VOP is an applicable tool to measure leg blood flow during HUT, especially up to 30 degrees HUT.
authors.affiliation: Dept of Physiology, Radboud University Nijmegen Medical Centre, Institute for Fundamental and Clinical Movement Sciences, Nijmegen, The Netherlands.
authors.forename: Miriam
authors.initials: M
authors.lastname: Kooijman
authors.forename: Fleur
authors.initials: F
authors.lastname: Poelkens
authors.forename: Gerard A
authors.initials: GA
authors.lastname: Rongen
authors.forename: Paul
authors.initials: P
authors.lastname: Smits
authors.forename: Maria T E
authors.initials: MT
authors.lastname: Hopman
mesh_terms: D000328:Adult; D006257:Head; D006801:Humans; D007866:Leg / Q000098:blood supply* / Q000000981:diagnostic imaging; D010991:Plethysmography; D011187:Posture / Q000502:physiology*; D012039:Regional Blood Flow; D015203:Reproducibility of Results; D014463:Ultrasonography; D014680:Veins