Fluid conduit assembly with air venting features

Patent metadata

Field	Value
Publication number	US-9833564-B2
Application number	US-201414553766-A
Country	US
Kind code	B2
Filing date	Nov 25, 2014
Priority date	Nov 25, 2014
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

A fluid conduit assembly for delivery of a medication fluid, and an associated fluid delivery system, are disclosed here. The fluid conduit assembly includes a trapping chamber having an interior volume to receive the medication fluid. The fluid conduit assembly also includes an inlet in fluid communication with the interior volume, a first outlet arrangement for the trapping chamber, and a second outlet arrangement for the trapping chamber. The first outlet arrangement accommodates flow of liquid from the interior volume, while inhibiting flow of gas from the interior volume. The second outlet arrangement accommodates flow of gas from the interior volume, while inhibiting flow of liquid from the interior volume.

First claim

What is claimed is:

1. A fluid conduit assembly for delivery of a medication fluid, the fluid conduit assembly comprising:
a reservoir cap comprising a lower body section configured to receive and couple to a fluid reservoir, and configured to couple to a housing of a fluid infusion device to seal and secure the fluid reservoir inside the housing;
a trapping chamber integrally formed in the lower body section of the reservoir cap, the trapping chamber comprising an upper wall, a delivery hole formed in the upper wall, a plurality of vent holes formed in the upper wall and arranged around the delivery hole, and an interior volume to receive the medication fluid from the fluid reservoir;
an inlet in fluid communication with the interior volume, the inlet formed in a lower wall of the trapping chamber, the lower wall opposing the upper wall of the trapping chamber;
a first outlet arrangement for the trapping chamber, the first outlet arrangement accommodating flow of liquid from the interior volume and inhibiting flow of gas from the interior volume, the first outlet arrangement comprising a first membrane completely covering the delivery hole, the first membrane having hydrophilic properties;
a length of hollow tubing in fluid communication with the first outlet arrangement by way of the delivery hole formed in the upper wall; and
a second outlet arrangement for the trapping chamber, the second outlet arrangement accommodating flow of gas from the interior volume and inhibiting flow of liquid from the interior volume, the second outlet arrangement comprising a second membrane completely covering the plurality of vent holes, the second membrane having hydrophobic properties;
wherein the first membrane covers the delivery hole without interfering with the second membrane and without interfering with any of the plurality of vent holes; and
wherein the second membrane comprises a single ring-shaped membrane that surrounds the first membrane without interfering with the first membrane and without interfering with the delivery hole.

2. The fluid conduit assembly of claim 1 , further comprising a hollow needle coupled to the inlet, wherein the medication fluid enters the interior volume of the trapping chamber via the hollow needle during a fluid delivery operation.

3. The fluid conduit assembly of claim 1 , wherein the vent hole exits into external airspace surrounding the trapping chamber.

4. A fluid delivery system comprising:
a fluid infusion pump; and
a fluid conduit assembly coupled to the fluid infusion pump, the fluid conduit assembly comprising:
a reservoir cap comprising a lower body section configured to receive and couple to a fluid reservoir, and configured to couple to a housing of the fluid infusion pump to seal and secure the fluid reservoir inside the housing;
a trapping chamber integrally formed in the lower body section of the reservoir cap, the trapping chamber having an upper wall, a delivery hole formed in the upper wall, a plurality of vent holes formed in the upper wall and arranged around the delivery hole, and an interior volume to receive fluid from the fluid reservoir;
an inlet in fluid communication with the interior volume, the inlet formed in a lower wall of the trapping chamber, the lower wall opposing the upper wall of the trapping chamber;
a liquid outlet arrangement that allows liquid to flow from the interior volume to a fluid delivery conduit in fluid communication with the delivery hole, while inhibiting flow of gas from the interior volume to the fluid delivery conduit, the liquid outlet arrangement comprising a first membrane completely covering the delivery hole, the first membrane having hydrophilic properties; and
a gas outlet arrangement that allows gas to exit the interior volume while inhibiting flow of liquid from the interior volume, the gas outlet arrangement comprising a second membrane completely covering the plurality of vent holes, the second membrane having hydrophobic properties;

wherein the first membrane covers the delivery hole without interfering with the second membrane and without interfering with any of the plurality of vent holes; and
wherein the second membrane comprises a single ring-shaped membrane that surrounds the first membrane without interfering with the first membrane and without interfering with the delivery hole.

Assignees

• Medtronic Minimed Inc

Inventors

• Montalvo Susan Mcconnell

Classifications

• A61M5/38

  using hydrophilic or hydrophobic filters · CPC title

• A61M5/14244 Primary

  adapted to be carried by the patient, e.g. portable on the body · CPC title

• A61M5/145 Primary

  using pressurised reservoirs, e.g. pressurised by means of pistons · CPC title

• A61M5/158

  Needles {for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body} · CPC title

• A61M2205/7536

  allowing gas passage, but preventing liquid passage, e.g. liquophobic, hydrophobic, water-repellent membranes · CPC title