Which electrolyte disturbance is common postoperatively in association with hemodilution during CPB?

Hypokalemia is commonly associated with hemodilution during cardiopulmonary bypass (CPB). During this surgical procedure, large volumes of crystalloid and colloid solutions are typically administered to maintain hemodynamic stability and replace fluids. This dilutional effect can lead to a decreased concentration of potassium in the blood, resulting in hypokalemia.

Potassium is crucial for various cellular functions, particularly in cardiac myocytes, and postoperative hypokalemia can increase the risk of arrhythmias and other complications.

While electrolyte imbalances related to CPB can encompass a range of disturbances, hypokalemia's direct association with hemodilution makes it a critical point of focus in the management of patients undergoing cardiac surgery. Factors like renal function, the use of diuretics, and the composition of bypass solutions can further exacerbate potassium levels, emphasizing the need for careful monitoring and management in the postoperative setting.