Controlled limb reperfusion in patients having cardiac operations

Area of Science:

• Cardiovascular Surgery
• Vascular Surgery
• Critical Care Medicine

Background:

• Severe limb ischemia is a risk in cardiac surgery due to procedures like intraaortic balloon pump insertion and cardiopulmonary bypass.
• Normal reperfusion can lead to postischemic syndrome, increasing patient morbidity and mortality.
• Controlled reperfusion strategies aim to mitigate these risks.

Purpose of the Study:

• To test if controlled limb reperfusion reduces local and systemic complications compared to normal reperfusion.
• To evaluate the initial clinical application of controlled limb reperfusion in cardiac surgery patients.
• To assess the impact on postreperfusion syndrome and limb salvage.

Main Methods:

• Controlled limb reperfusion applied to 19 patients with severe prolonged ischemia, including those in cardiogenic shock.
• A 30-minute infusion of normothermic reperfusate mixed with arterial blood (6:1 ratio) into distal vessels.
• Data collected on patient outcomes, limb salvage, and systemic complications.

Main Results:

• 84% of patients survived with salvaged, functional limbs.
• No renal, cardiac, pulmonary, cerebral, or hemodynamic complications occurred in survivors.
• Deaths occurred only in patients with profound cardiogenic shock; no postischemic edema or contracture developed.

Conclusions:

• Controlled limb reperfusion is readily applicable using standard cardiac surgery equipment.
• This technique effectively salvages limbs in patients experiencing severe ischemia.
• Controlled limb reperfusion reduces postreperfusion morbidity and mortality in cardiac surgery patients.