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Noninvasive assessment of altered limb hemodynamics and complications of arterial catheterization.

A strain-gauge plethysmograph and an ultrasonic velocity detector were used to study the effects of arterial catheterization on peripheral arterial hemodynamics. Progressive vasoconstriction and arterial obstruction may result from the indwelling catheter and from vascular compression following its removal. A prospective study of 142 patients undergoing femoral artery catheterization revealed thrombolic complications in 14%. Femoral artery thrombosis and/or peripheral embolization were the most frequent complications.