[Noninvasive determination of viscoelastic properties of human finger arteries under various tonus conditions affecting vascular smooth muscle].
The amplitude of the volume pulse in relation to transmural pressure and the compliance as a viscoelastic property of the digital arteries were determined noninvasively in 9 male subjects (mean age 16 years). The amplitude of the volume pulse was measured impedance-plethysmographically and the amplitude of the pressure pulse sphygmomanometrically. The registration of the pulses was performed under different conditions (sitting-control), lying, 3-min forearm ischaemia, concentration-performance test, hyperventilation, 0.8 mg Nitrangin sublingual) to provoke different states of the vessel wall. The amplitude of the volume pulse under concentration-performance test (0.054 +/- 0.015 ml), hyperventilation (0.045 +/- 0.015 ml) and Nitrangin (0.142 +/- 0.034 ml) is significantly (p = 0.025) different from control (0.086 +/- 0.016 ml). The amplitude of the volume pulse and the compliance increase with decreasing transmural pressure.
Bochmann
R
R
Zentrale Hochschulpoliklinik, Abteilung Pathophysiologie, Medizinische Akademie Carl Gustav Carus, Dresden, DDR.
Altmann
O
O
D000293:Adolescent; D001158:Arteries / Q000502:physiology; D001794:Blood Pressure; D004548:Elasticity; D005385:Fingers / Q000098:blood supply; D006801:Humans; D006985:Hyperventilation / Q000503:physiopathology; D007511:Ischemia / Q000503:physiopathology; D008297:Male; D009129:Muscle Tonus; D009131:Muscle, Smooth, Vascular / Q000502:physiology*; D010992:Plethysmography, Impedance; D011674:Pulse; D012039:Regional Blood Flow; D014783:Viscosity
Nichtinvasive Bestimmung der viskoelastischen Eigenschaften der Fingerarterien bei verschiedenen Tonuszuständen der glatten Gefässmuskulatur.