Closure of digital arteries in high vascular tone states as demonstrated by measurement of systolic blood pressure in the fingers

摘要: Finger systolic blood pressure (FSP) was measured indirectly in normal subjects and patients with primary Raynaud phenomenon by applying a thin-walled plastic cuff around the finger strain gauge more distally to detect volume changes. Inducing high vascular tone one or fingers direct cooling intra-arterial noradrenaline infusion caused marked drop FSP exposed fingers, but not non-exposed of same hand. The fact that retained (arm systolic) level is taken indicate palmar arch also remained normal. In state, large transmural difference must apparently be established before digital arteries are forced open. lowered opening constitutes manifestation closure described vasospastic arterial disease. It implies an underestimation on t...