Thrombolysis ============ þ Prehospital Thrombolysis þ Thrombolysis might be useful in PE, DVT, CVA, Arterial Thrombosis þ Risk factors for thrombolysis: þ Protocol for Noncoronary Thrombolysis (Sherry) - Baseline CBC, PT/PTT, fibrinogen - if giving streptokinase, first give hydrocortisone sodium succinate 100 mg IV (reduces allergic reactions to less than 5%; treat fever with acetaminophen but not a reason to stop unless other symptoms of allergy.) - Load with 250,000 units of streptokinase over 30 minutes by pump - follow by infusion of 100,000 units per hour - check fibrinogen in 2-4 hours; should be down significantly (often about 50% with streptokinase, more often about 25% down with urokinase and tPA) - continue for 72 hours or until demonstrated therapeutic result - titration not useful - after completing streptokinase infusion, wait for 3-4 hours, then check PTT. If elevated but therapeutic ()1.5 to 2 times control), start heparin at usual doses but without loading dose - If PTT more than 2 times control, wait another 2-3 hours and recheck - If PTT near-normal, give small heparin bolus and start infusion. If resistant to streptokinase, may give urokinase: load with 2,000 IU per lb. of body wt, then infuse 2,000 IU per lb. per hour; may continue as long as needed, because not antigenic.