Infusion Device

• US 20070049877A1
• Filed: 09/18/2006
• Published: 03/01/2007
• Est. Priority Date: 07/02/2002
• Status: Active Grant

• Current Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Original Assignee: Patton Medical Devices LP
• Inventors: Patton, Catherine
• Granted Patent: US 7,731,680 B2
• Time in Patent Office: Days
• US Class Current: 604/288.10
• CPC Class Codes: A61M 2039/027 having a particular valve, seal or septum
• CPC Class Codes: A61M 2039/0294 having a specific shape matching the shape of a tool to be inserted therein, e.g. for easy introduction, for sealing purposes, guide
• CPC Class Codes: A61M 39/0247 Semi-permanent or permanent transcutaneous or percutaneous access sites to the inside of the body peritoneal dialysis catheters A61M1/285; tracheostomy devices A61M16/0465; measuring pressure within the body A61B5/03; colostomy devices A61F5/445; gastrotomy feeding tubes A61J15/0015; means for fixing a feeding tube outside of the body A61J15/0053
• CPC Class Codes: A61M 39/04 having pierceable self-sealing members
• CPC Class Codes: A61M 5/162 Needle sets, i.e. connections by puncture between reservoir and tube ; Connections between reservoir and tube in jet-action syringes A61M5/30; connectors for tubes having sealed ends and a needle for piercing them A61M39/14

Abstract

The disclosures made herein relate to an infusion device specifically adapted for syringe injections. In one embodiment of the disclosures made herein, an infusion device comprises a body including an accessible surface having a single inlet port therein, an engagement surface having a single outlet port therein, a medication delivery channel extending between the single inlet port and the single outlet port, and an identification feature on the accessible surface of the body adjacent to the single inlet port. The single inlet port of the medication delivery channel is tapered thereby forming a funnel-shaped entry into the medication delivery channel. A cannula is coupled to the body at the single outlet port and is adapted for receiving medication from the single outlet port and transmitting the medication therethrough.

Claims

1. An infusion device comprising:

a body having a body passageway;

a cannula having a portion extending from the body, the cannula also having a cannula passageway defined by a cannula passageway wall, the cannula passageway wall having an inwardly-tapered portion that will be above a patient'"'"'s skin when the infusion device is used, the cannula passageway having a cannula passageway end positioned outside the body, the cannula passageway end having a width,

a septum positioned within the body passageway, the septum having a septum top surface that includes a septum top surface portion accessible to an injection needle, the septum top surface portion having a septum cross-section positioned perpendicular to an axis that is centered in the body passageway, the septum cross-section having a greatest width that is greater than the width of the cannula passageway end; and

an inner surface that directly borders open space within the body passageway that is downstream of the septum and upstream of the inwardly-tapered cannula passageway wall portion, the inner surface defining a first inner surface perimeter positioned in a first plane that is perpendicular to the axis, the inner surface also defining a second inner surface perimeter positioned in a second plane that is parallel to and downstream of the first plane, the first inner surface perimeter defining a first cross-sectional area, the second inner surface perimeter defining a second cross-sectional area, and the first cross-sectional area being greater than the second cross-sectional area;

the infusion device being configured such that (a) a first portion of the infusion device is above the patient'"'"'s skin surface when the infusion device is used and (b) a second portion of the infusion device is beneath the patient'"'"'s skin surface when the device is used, the first portion having a first portion height measured along the axis, the second portion having a second portion height measured along the axis, the second portion height being greater than the fist portion height.

2. The infusion device of claim 1, in which the septum includes an outer wall extending from the septum top surface that includes an inwardly-tapered portion.

3. The infusion device of claim 1, in which the body includes a top and a bottom, the septum includes a bottom, and the infusion device includes (a) a first greatest distance parallel to the axis between the septum top surface and the top of the body and (b) a second greatest distance parallel to the axis between the bottom of the septum and the bottom of the body, the second greatest distance being greater than the first greatest distance.

4. The infusion device of claim 1, in which the body includes an inlet to the body passageway and an identification feature adjacent to the inlet for identifying the body passageway.