Sunday, June 6, 2010

Selective Catheter-Directed Thrombolysis: Contraindications

Enzymatic thrombolysis is indicated when the anticipated outcome is similar to that of surgical intervention and can be done quickly enough to avoid irreversible ischemic damage. Regarding the latter, only patients with sufficient collateral vessels to maintain limb viability for 12 hours should be considered for thrombolytic therapy.

Absolute contraindications:
  • Irreversible ischemia: Due to reperfusion syndrome and the fact that opening a vessel that has no run off is pointless, as it will quickly thrombose again.
  • Recent (> 3 hours and <3 months) ischemic stroke: Patients with ischemic stroke < 3 hours may be eligible for thrombolysis.
  • Recent (2 months) intracranial surgery
  • Recent (3 months) major blunt head or facial trauma
  • History of hemorrhagic stroke
  • History of spontaneous intracranial hemorrhage
  • Intracranial neoplasm (primary or metastatic) or vascular malformation
  • Suspected aortic dissection
  • Active bleeding
  • Bleeding diathesis
Major relative contraindications:
  • Remote (> 3 months) ischemic stroke
  • Recent (3 weeks) major thoracic or abdominal surgery
  • Recent major trauma
  • Recent (1 month) internal bleeding
  • Recent (3 months) gastrointestinal hemorrhage
  • Uncontrolled hypertension: Increased risk of intracranial hemorrhage.
  • Prolonged (> 10 minutes) or traumatic CPR
  • Current use of anticoagulants
Minor relative contraindications:
  • Pregnancy
  • Infected thrombus
  • Renal or hepatic insufficiency: Due to increased risk of coagulopathy in these states
  • Diabetic retinopathy

References

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