Patients' Resources


Light Reflex Rheography (LRR)

What is a Light Reflex Rheography or LRR? Light reflex Rheography is a refined form of Photo-Plethysmography (PPG). This method is a non-invasive examination which measures the venous blood flow in the lower legs using infrared light, to evaluate the function of venous valves and the effectiveness of venous muscle pump. Venous blood volume changes… View Article