Intermediate
Technical
IVT
pulsatile flow
Blood flow that maintains physiologic pressure variations during cardiopulmonary bypass, as opposed to non-pulsatile roller pump flow.
Full Definition
A mode of perfusion during cardiac surgery that attempts to replicate the natural pulsatile nature of cardiac output. Unlike standard roller pump systems that provide continuous flow, pulsatile flow maintains pressure variations that may improve organ perfusion and reduce inflammatory response. This technique is sometimes used in high-risk patients or prolonged procedures to potentially preserve renal and cerebral function.
Usage
Usage note: Distinguish from general hemodynamic terms; specific to extracorporeal circulation.
In Context
- "The perfusionist switched to pulsatile flow during the lengthy valve replacement to optimize renal perfusion." — Operative note
- "Studies suggest pulsatile flow may reduce postoperative cognitive dysfunction in elderly patients." — Research protocol
Also known as
physiologic flow
pulsatile perfusion
Contrasted with
non-pulsatile flow
continuous flow
Don't confuse with
laminar flow
turbulent flow