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 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;a funnel element associated with the fluid delivery port, wherein the pressure vent is formed in the funnel element; anda septum located in the fluid delivery port and having a nominal non-pierced state forming a fluid seal within the fluid conduit; wherein the pressure vent provides a venting conduit from inside the fluid chamber to outside the fluid chamber; and wherein the pressure vent terminates at an exterior surface of the fluid delivery port, the exterior surface contoured to mate with a resilient sealing element of the fluid infusion device to seal the pressure vent.