Fluid delivery system and method of fluid delivery to a patient

摘要

A fluid delivery system includes a pressurizing mechanism. The pressurizing mechanism includes: a substantially cylindrical body having a movable member positioned therein that divides the body into a first chamber and a second chamber; a plunger rod connected to a first side of the movable member and extending through a substantially closed first end of the body; and an elongated member connected to a second side of the movable member and extending through a substantially closed second end of the body. The plunger rod configured to operatively engage a fluid container. Fluid is dispensed from the fluid container by forming a vacuum within at least the first chamber by moving the movable member toward the second end of the body, allowing atmospheric pressure to enter the second chamber, and actuating the pressurizing mechanism to cause the moving member to move towards the first end of the body.

主权项

1. A fluid delivery system comprising a pressurizing mechanism, the pressurizing mechanism comprising:
a substantially cylindrical body having a movable member positioned therein that divides the body into a first chamber and a second chamber; a plunger rod connected to a first side of the movable member and extending through a substantially closed first end of the body, the plunger rod configured to operatively engage a fluid container; an elongated member connected to a second side of the movable member and extending through a substantially closed second end of the body; a first valve in communication with the first chamber; and a second valve in communication with the second chamber, wherein a fluid is dispensed from the fluid container by forming a vacuum within at least the first chamber due to the first valve by moving the movable member toward the second end of the body thereby expelling air from the second chamber through the second valve, advancing the movable member toward the first end of the body to create a vacuum in the second chamber that balances the vacuum in the first chamber, allowing atmospheric pressure to enter the second chamber by opening the second valve, and actuating the pressurizing mechanism to cause the movable member to move towards the first end of the body and forcing the plunger rod to move within the fluid container.