Fluid Management in Ischemia

General Principles

Maintaining euvolemia is fundamental to optimize distal perfusion, with a daily fluid maintenance calculation of 30 mL per kilogram of body weight, as recommended by the American Heart Association 1
The American Heart Association recommends avoiding reduction of blood pressure unless it is extremely elevated (>220/120 mmHg) in patients with acute ischemia, to prevent poor outcomes 1, 2

Hypotension during acute ischemia is associated with poor outcomes, and therefore, blood pressure should not be reduced unless it is extremely elevated (>220/120 mmHg), as recommended by the American Heart Association and American College of Cardiology 1, 2
Providing adequate analgesia for pain control is essential for patient comfort and to prevent further complications, as recommended by the European Society of Cardiology 3

The severity of acute limb ischemia should be classified based on clinical findings, including Category I (Viable), Category IIa (Marginally Threatened), Category IIb (Immediately Threatened), and Category III (Irreversible), as recommended by the American College of Cardiology and American Heart Association 4, 5, 6
The clinical examination should focus on pulse assessment, skin color and temperature, sensory function, motor function, and Doppler assessment of arterial and venous signals to evaluate the severity of ischemia, as recommended by the American College of Cardiology and American Heart Association 4, 5
The American College of Radiology recommends CT angiography (CTA) of pelvis with runoff as the first-line diagnostic imaging modality, with a rating of 8/9, and MR angiography as an alternative if CTA is contraindicated, with a rating of 7/9 7

Catheter-directed thrombolysis in combination with mechanical clot removal is indicated to decrease time to reperfusion, which is a Class I, Level B recommendation from the European Heart Association 8
The European Society of Cardiology recommends surgical intervention if the patient has profound limb ischemia that cannot tolerate the time needed for thrombolysis, or if there are motor deficits (Class I, Level B recommendation) 8
The American Heart Association suggests that thrombolysis offers several advantages over surgical approaches, including lower morbidity and mortality, and the ability to clear thrombus from distal runoff vessels 5
Mechanical thrombectomy, including suction embolectomy and rheolytic therapy, is a useful option when thrombolysis is contraindicated, as recommended by the American College of Radiology 7
Surgical options, including catheter embolectomy and bypass, may be preferred when endovascular approaches are not available or feasible, as recommended by the European Society of Cardiology and American College of Cardiology 9, 7, 10, 8

Monitoring for compartment syndrome and performing fasciotomy if needed is essential to prevent further complications, as recommended by the European Heart Journal and European Society of Cardiology 3
Assessing clinical and hemodynamic success of revascularization is crucial to determine the effectiveness of treatment, including evaluating pulses, skin color, temperature, and sensory/motor function, as recommended by the European Society of Cardiology 3
The European Heart Association recommends that after thrombus removal, any pre-existing arterial lesion should be treated by endovascular methods or open surgery 8
Considering dual antiplatelet therapy or anticoagulation for secondary prevention is recommended to reduce the risk of further thrombotic events, with a rating of 7/9 by the American College of Radiology 7, 3

Delaying revascularization when neurological deficits are present can lead to poor outcomes and increased risk of limb loss, as emphasized by the American College of Cardiology and American Heart Association 6
Failing to administer immediate anticoagulation can result in further thrombosis and worsen outcomes, as recommended by the European Society of Cardiology and American College of Cardiology 6
Not monitoring for reperfusion injury or compartment syndrome can lead to serious complications and poor outcomes, as recommended by the European Heart Journal and European Society of Cardiology 3
Overlooking the underlying cause of thrombosis/embolization can increase the risk of recurrence and poor outcomes, as recommended by the European Society of Cardiology and American College of Cardiology 3
Inadequate anticoagulation can lead to thrombus propagation, and overlooking hypercoagulable states can result in recurrent events, emphasizing the importance of prompt and effective anticoagulation and comprehensive evaluation, as recommended by the American College of Radiology and European Society of Cardiology 5, 7