PUMPING DEVICES, SYSTEMS AND METHODS FOR USE WITH MEDICAL FLUIDS INCLUDING COMPENSATION FOR VARIATIONS IN PRESSURE OR FLOW RATE
First Claim
1. A compensating system for reducing variations in pressure of a fluid, comprising:
- a rigid conduit defining a lumen;
a flexible conduit disposed within the lumen of the rigid conduit and defining an inlet adapted to place the flexible conduit in fluid connection with the fluid; and
a compressible fluid entrapped in a volume between the rigid conduit and the flexible conduit.
1 Assignment
0 Petitions
Accused Products
Abstract
A system for delivery of a medical fluid to a patient includes a pump system including a pressurizing unit to pressurize the medical fluid and a drive system in operative connection with the pressurizing unit. The pump system exhibits variation in pressure during operation. The system further includes a compensating system in fluid connection with the medical fluid pressurized by the pressurizing unit. The compensating system defines a displacement volume in fluid connection with the pressurized medical fluid that is altered in a predetermined manner to alter the variation in pressure. The compensating system can, for example, reduce pulsatility of pressure during flow.
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Citations
18 Claims
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1. A compensating system for reducing variations in pressure of a fluid, comprising:
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a rigid conduit defining a lumen; a flexible conduit disposed within the lumen of the rigid conduit and defining an inlet adapted to place the flexible conduit in fluid connection with the fluid; and a compressible fluid entrapped in a volume between the rigid conduit and the flexible conduit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A fluid path set for an injector comprising:
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a compensating system for reducing variations in pressure of a fluid, comprising; a rigid conduit defining a lumen; a flexible conduit disposed within the lumen of the rigid conduit and defining an inlet adapted to place the flexible conduit in fluid connection with the fluid and an outlet; and a compressible fluid entrapped in a volume between the rigid conduit and the flexible conduit; and a fluid delivery set attached to the outlet of the compensating system to deliver the fluid to a patient. - View Dependent Claims (15, 16, 17, 18)
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Specification