Association Between New Effort-independent Cardiopulmonary Exercise Test Variables and Postoperative Complications After Elective Colorectal Surgery

A cardiopulmonary exercise test (CPET) is increasingly used for preoperative risk assessment. Oxygen uptake (VO2) at peak exercise (VO2peak) and VO2 at the ventilatory anaerobic threshold (VO2VAT) are the most commonly used preoperative CPET variables that are associated with postoperative outcomes following colorectal cancer surgery. The aim of this study is to investigate the association between two relatively new preoperative submaximal and effort-independent CPET variables, the cardiopulmonary optimal point (COP) and the Oxyen uptake efficiency plateau (OUEP) and postoperative outcomes in colorectal cancer surgery.
In additiion, the association between the oxygen uptake at the COP en OUEP and postoperative outcomes wil be explored.