Pressure vented fluid reservoir for a fluid infusion device

摘要

Disclosed herein is a fluid infusion device of the type that delivers medication fluid to the body of a patient. The device includes or cooperates with a fluid reservoir, and the device has a sealing assembly to receive and form a fluid seal with the fluid reservoir. A retractable sealing element surrounding a hollow fluid delivery needle may be used to seal a port of the fluid reservoir. The port may include a pressure vent that is sealed by the retractable sealing element. In one variation, the reservoir includes a moving valve sleeve that holds a septum. The septum moves to allow the reservoir to vent, and to form a seal with the port when the needle pierces the septum. In another variation, the device includes a needleless sealing assembly. In yet other variations, the device uses a needled fluid reservoir.

主权项

1. A fluid infusion device that delivers a medication fluid to a body, the fluid infusion device comprising:
a base plate; a hollow fluid delivery needle coupled to the base plate to provide a fluid flow path for the medication fluid; a sealing element coupled to the base plate and overlying at least a portion of the hollow fluid delivery needle, the sealing element comprising:
a base section;a tip section extending from the base section; anda retractable body section between the base section and the tip section; and a fluid reservoir comprising:
a main body section that defines a fluid chamber for the medication fluid;a plunger to expel the medication fluid from the fluid chamber when actuated;a fluid delivery port coupled to and extending from the main body section, the fluid delivery port comprising a fluid conduit and a pressure vent defined therein; anda septum located in the fluid delivery port and having a nominal non-pierced state forming a seal within the fluid conduit; wherein the pressure vent provides a venting conduit from inside the fluid chamber to outside the fluid chamber; wherein the pressure vent terminates at an exterior and exposed surface of the fluid delivery port, the exterior and exposed surface contoured to mate with a resilient sealing element of the fluid infusion device to seal the pressure vent; and wherein the fluid delivery port engages and cooperates with the sealing element and the hollow fluid delivery needle such that the tip section of the sealing element is urged against the fluid delivery port to seal the pressure vent.