Diagnosis of deep venous thrombosis by measurement of electrical impedance

摘要: Abstract Electrical impedance can be measured in the leg by a simple noninvasive technic, somewhat analogous to electrocardiography. Normal tracings show marked fall with deep inspiration, due increased local venous blood volume. In presence of thrombosis, these respiratory changes are damped or obliterated. Based on use fifty-one patients, measurement electrical has proved safe and useful screening procedure for diagnosis correlating almost uniformly venography objective verification at surgery (thirty-four thirty-five cases).