How to calibrate the PanLab Langendorff System (constant pressure or flow)for isolated heart work with ADI's head of Support, Mark de Reus. Includes how to calibrate for flow, how to measure and record perfusate pressure, how to use the STH pump controller's constant pressure mode, plus other helpful tips. Enhance your cardiovascular research with an ADInstruments Langendorff System. The robust Panlab apparatus is ideal for perfusing small animal hearts, such as mouse and rat, and allows you to measure cardiac contractile strength (inotropic effects), heart rate (chronotropic effects) and vascular effects, without the influence of neuronal and hormonal factors.