“Decreased Urethral Perfusion Index During Off-Pump Coronary Artery Bypass Surgery: Clinical Significance and Macrohemodynamic Relationship Unclear”

https://pubmed.ncbi.nlm.nih.gov/38114369

The urethral perfusion index (uPI) decreases during off-pump coronary artery bypass (OPCAB) surgery, particularly during the cardiac positioning phase, but its clinical significance and relationship to macrohemodynamics remain unclear.