"Transonic Inside" Assures Dialysis Patients Receive the Correct Prescription

“A rotary blood pump inherently provides only one noninvasive "observable" parameter (motor current) and allows for only one "controllable" parameter (pump speed.) To maintain the systemic circulation properly, the pump speed must be controlled to sustain appropriate outlet flows and perfusion pressure while preventing pulmonary damage caused by extremes in preload.”   Konishi H, Artif Organs. 1996 Jun;20(6):618-20.
 

During the early 1990s, Dr. Thomas Depner, a nephrologist at the University of California at Davis, studied the wear and cavitation of tubing at different pressure pump settings and recognized that actual pump flow might differ from the pump’s setting during hemodialysis treatments. 

He called for an independent measure of delivered blood flow to verify the flow set by the pump during prolonged blood pump procedures such as dialysis and ECMO. Not only did his observation lead to development of the Transonic Hemodialysis Monitor that measures delivered pump flow directly with transit-time ultrasound Flowsensors applied to the dialysis lines, but also to incorporation of Transonic Flowboards and Flowsensors into various dialysis machine. 

Imbedded Transonic flowsensing in these devices adds extra assurance that the hemodialysis patient is receiving the blood flow needed to deliver an accurate dialysis prescription.