Elevated Pulse Pressure in Anesthetized Subjects Before Cardiopulmonary Bypass Is Associated Strongly With Postoperative Acute Kidney Injury Stage

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Elevated Pulse Pressure in Anesthetized Subjects Before Cardiopulmonary Bypass Is Associated Strongly With Postoperative Acute Kidney Injury Stage

Objective

To investigate whether pulse pressure (PP) in anesthetized patients undergoing cardiac surgery before and after cardiopulmonary bypass (CPB) is associated with higher postoperative acute kidney injury (AKI) stage.

Design

Retrospective cohort of 597 patients undergoing cardiac surgery.

Setting

Single academic health care center.

Participants

Adult patients undergoing cardiac surgery requiring CPB (coronary artery bypass grafting, valve, aortic, or combined surgery).

Interventions

Pulse pressure was assessed during 3 time periods: pre- and post-CPB, and in the first postoperative hour in the intensive care unit. Pulse pressure, patient characteristics, and intraoperative variables were evaluated using univariable generalized estimating equation analysis for a relationship with AKI stage. Significant risk factors from the univariable analysis then were evaluated in a multivariable generalized estimating equation analysis. Acute kidney injury stage was defined using the Acute Kidney Injury Network criteria.

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