Optimizing Pulsatility During Cardiopulmonary Bypass to Reduce Acute Kidney Injury: Prospective Observational Study
University of Colorado, Denver
Summary
Cardiopulmonary bypass during cardiac surgery provides blood flow to the body during surgery but has adverse effects on different organs. Blood flow during cardiopulmonary bypass may be pulsatile or non-pulsatile, which may impact normal organ function after surgery. The study will collect data on the type of cardiopulmonary bypass used during surgery and organ function to determine if there is an association between the type of bypass and organ function.
Description
Cardiac surgery is a high-risk elective surgical procedure frequently requiring CPB in which a machine pumps blood while the surgeon operates on the heart. CPB contributes to surgical risk by causing endothelial dysfunction and acute kidney injury (AKI). Endothelial dysfunction and AKI happen because heart lung machines typically generate non-pulsatile blood flow, which is abnormal and results in impaired tissue oxygen delivery. Normal blood flow is pulsatile due intermittent contraction and relaxation of the heart during the cardiac cycle, which produces a mechanical signal that induces endot…
Eligibility
- Age range
- 50–70 years
- Sex
- All
- Healthy volunteers
- No
Inclusion Criteria: * Age 50 to 70 * Able to provide informed consent * Scheduled for elective cardiac surgery with cardiopulmonary bypass Exclusion Criteria: * Patients undergoing emergency procedures * Diagnosed with sepsis * Experiencing delirium * Experiencing hemodynamic instability (heart rate \> 100 and systolic blood pressure \< 90) * Patients with a mechanical circulatory support device * Requiring vasoactive medications before surgery * Patients with a reduced left ventricular ejection fraction (less than 50%) * Patients with a contraindication to transesophageal echocardiography
Location
- University of Colorado HospitalAurora, Colorado