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Clinical Trial
Journal Article
Randomized Controlled Trial
Recombinant human tissue-type plasminogen activator is an effective agent for thrombolysis of peripheral arteries and bypass grafts: preliminary report.
Journal of Vascular Surgery 1989 November
The efficacy, safety, and effects on hemostasis and coagulation of two doses of human tissue-type plasminogen activator in patients with acute and subacute peripheral arterial occlusion were compared. Seven patients with lower extremity ischemia and one patient with upper extremity ischemia had peripheral arterial thromboses (five arteries, three grafts) confirmed by clinical history, physical examination, and angiography. The duration of occlusion ranged from 31 hours to 30 days (mean 11.9 days). Tissue-type plasminogen activator was infused via a catheter directly into the thrombus at a randomly assigned dose of 0.05 mg/kg/hr (n = 4) or 0.025 mg/kg/hr (n = 4). Thrombolysis was complete in seven patients and partial in one. Duration of infusion ranged from 1 hour to 21 hours (mean 7.4 hours). The low dose required a longer infusion than did the high dose, but they were both successful in achieving thrombolysis. The one patient with partial thrombolysis had abrupt discontinuation of infusion when extravasation through a recently endarterectomized femoral artery developed. Otherwise there were no significant complications from tissue-type plasminogen activator therapy. Secondary procedures to correct underlying arterial disease were performed in five of the seven patients (71%) who had complete thrombolysis. Even at low dosages, infusion of tissue-type plasminogen activator into arteries or bypass graft thrombus produced complete thrombolysis, and no major complications occurred. This allowed more systematic effects to diagnose and treat underlying arterial disease.
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