Patent ID: 9480791
Filing Date: 2016-11-01
CPC Classification: A61M

Claim Text:
1. A system for delivery of a medical fluid to a patient comprising: a pump system comprising a pressurizing unit to pressurize the medical fluid and a drive system in operative connection with the pressurizing unit, the pump system exhibiting a variation in pressure during operation; and a compensating system in fluid connection with the medical fluid pressurized by the pressurizing unit, the compensating system defining a chamber having a displacement volume in fluid connection with the pressurized medical fluid wherein the displacement volume is altered to alter the variation in pressure, the compensating system comprising a piston that is reciprocally moveable within the chamber to alter the displacement volume of the chamber, a first end of the piston of the compensating system being in operative connection with a drive mechanism adapted to actively move the piston of the compensating system in a manner dependent upon timing of actuation of the pressurizing unit, a second end of the piston of the compensating system being biased against the force of the pressurized medical fluid by a compressible biasing mechanism having a predetermined compressibility, wherein the piston of the compensating system is actively moved by the drive mechanism against the biasing force of the compressible biasing mechanism to reduce pulsatility of the pressurized medical fluid over a range of fluid pressure within the operating pressure range of the pump system.