What assessments and management steps are required during streptokinase (SK) infusion, including monitoring for and treating allergic reactions, bleeding, and re‑occlusion?

Management During Streptokinase Infusion

Monitor continuously for bleeding complications, allergic/anaphylactic reactions, and hypotension during and for several hours after streptokinase infusion, with immediate access to resuscitation equipment and discontinuation protocols.

Critical Monitoring Parameters

1. Bleeding Surveillance (Highest Priority)

Continuous clinical monitoring for bleeding is mandatory as hemorrhage is the most frequent adverse reaction (>5%) 1.

• Avoid all intramuscular injections during and after infusion 1
• Monitor puncture sites every 15-30 minutes (30% minor bleeding rate reported) 2
• Assess for major bleeding: intracranial hemorrhage (0.9-1.0% incidence), gastrointestinal bleeding, retroperitoneal bleeding 3
• Neurological checks every 15-30 minutes for signs of intracranial hemorrhage 4, 3
• If serious bleeding occurs: immediately discontinue streptokinase 1

Laboratory monitoring:

• Baseline coagulation parameters before infusion
• Repeat at 4 hours and 24 hours, then every 24 hours 2
• Note: Coagulation parameters change promptly but are not predictive of hemorrhage risk 2

2. Allergic/Anaphylactic Reaction Monitoring

Streptokinase is highly antigenic - this is a critical distinguishing feature from fibrin-specific agents 4, 3.

Monitor during and for several hours after infusion 1:

• Immediate anaphylaxis can occur within minutes of starting infusion 5, 6
• Watch for: hypotension, erythematous rash, bronchospasm, respiratory distress 6
• Common allergic manifestations (from pharmacovigilance data): chills, tremors, fever, allergy 7

Management of anaphylaxis:

• Discontinue streptokinase immediately 1
• Epinephrine is the agent of choice for hypotension (dopamine and norepinephrine may fail) 6
• Mechanical ventilation may be required 6
• Have resuscitation equipment immediately available

Critical contraindication: Streptokinase is absolutely contraindicated within 6 months of previous exposure due to antibody formation and serious allergic reaction risk 4

3. Hemodynamic Monitoring

Hypotension is a frequent complication specific to streptokinase 3, 7.

• Continuous blood pressure monitoring during infusion
• Hypotension was among the most frequently reported adverse reactions in post-marketing surveillance 7
• Severe uncontrolled hypertension (SBP >180 or DBP >110 mmHg) is a relative contraindication and requires emergency therapy before administration 4

4. Cardiac Rhythm Monitoring

Continuous ECG monitoring is essential:

• Arrhythmias are frequently reported during streptokinase infusion 7
• Arrhythmias increase mortality risk 3-fold (OR 3.1,95% CI: 1.8-5.1) 7
• Monitor for reperfusion arrhythmias indicating successful thrombolysis

5. Reperfusion Assessment

Monitor for successful reperfusion (non-invasively):

• Clinical: Resolution of chest pain 8
• ECG: ST-segment resolution >50% at 90 minutes 8
• Laboratory: Earlier and higher peaking of cardiac troponin 8

Failed reperfusion indicators:

• Persistent chest pain
• <50% ST-segment resolution
• Prepare for urgent coronary angiography if reperfusion fails 9

Infusion Protocol Specifics

Standard regimen: 1.5 million units IV over 30-60 minutes 4

• Accelerated regimen (30 minutes) shows better efficacy with similar safety profile 8
• Do not add other medications to streptokinase infusion 1

Concurrent anticoagulation:

• Continue heparin infusion (250-500 units/hour) during streptokinase 2
• Aspirin 75-100 mg daily (additive benefit) 3
• Clopidogrel should be added 3

Common Pitfalls to Avoid

1. Do NOT routinely pretreat with corticosteroids/antihistamines - little evidence supports this practice 6
2. Do NOT perform non-compressible vascular punctures during or immediately after infusion 4
3. Do NOT underestimate systemic fibrinolytic effects even with "low-dose" regimens - systemic effects and hemorrhagic complications are common 10
4. Do NOT delay recognition of failed reperfusion - have plan for rescue PCI within 2-24 hours after successful lysis 3

Post-Infusion Monitoring

• Continue monitoring for several hours after completion 1
• Early angiography (2-24 hours) after successful fibrinolysis is recommended standard of care 3
• Monitor for re-occlusion, reinfarction, and recurrent ischemia 3
• In pulmonary embolism patients, consider risk of reembolization from lysis of deep venous thrombi 1