Comparing Kidney and Limb NIRS Sensors to Predict Acute Kidney Injury in Adults Undergoing Cardiac Surgery with Cardiopulmonary Bypass

What this Trial Is About

Researchers are evaluating the use of Near Infrared Spectroscopy NIRS to predict acute kidney injury AKI in adult patients undergoing cardiac surgery with cardiopulmonary bypass. AKI is a common and serious complication after such surgeries, leading to increased hospital stays, costs, and mortality. This study aims to compare the effectiveness of NIRS sensors placed on the skin over the kidney versus sensors placed on the limbs for predicting AKI. The research is conducted by the University of Utahs anesthesiology department. Participants will have NIRS sensors placed on the skin over their kidney, as located by ultrasound, and on the muscles of their arm and thigh before surgery. If a patient has had a right nephrectomy, the sensor will be placed over the left kidney. Additional sensors will be placed on the forehead to measure brain oxygen levels during surgery. The study observes how well these sensor placements predict AKI from the day of surgery up to seven days afterward. During the study, participants will undergo ultrasound measurements to determine the depth of kidney and muscle tissue before sensor placement. Researchers will monitor oxygen levels in various tissues throughout surgery and track outcomes such as AKI development, ventilator times, length of hospital stay, and in-hospital mortality up to three months. Hemodynamic data including blood pressure, oxygen delivery, vasopressor use, and anemia during surgery will also be recorded. The total observation period extends from surgery through hospital discharge and follow-up for up to three months.

A Comparison of Renal vs Limb NIRS for Predicting Cardiac Surgery Associated Acute Kidney Injury