Flow, the amount of fluid passing a certain point during a defined time frame (mL/min, L/min), is life’s quintessential vital sign. By delivering oxygen and nutrients to cells for metabolism and removing metabolic wastes, blood flow is life-giving. When blood fails to flow, life ends.
Whether a CABG is performed minimally-invasively, off-pump, on-pump, or robotically-assisted, the end point is the same: to know how much blood flow is going through a newly created anastomosis. A quantitative flow measurement takes only seconds to perform. The flow measurement augments a surgeon’s clinical observations such as the quality of the heart’s contractions, MAP, EKG, CO, and BP. Direct graft flow measurements help a surgeon identify a problem’s source more effectively and efficiently than any other single parameter as illustrated by the following two CABG cases where revisions were triggered by unacceptable flow measurements.