US5476460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Implantable infusion port with reduced internal volume
Assignee: Medtronic Minimed Inc
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Filing: 1994-04-29
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Granted: 1995-12-19
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Expires: 2014-04-29
Abstract
Abstract An implantable infusion port is provided to facilitate delivery of medication to a patient, wherein the infusion port has a substantially reduced internal volume to minimize the quantity of residual medication therein. The infusion port comprises a cup-shaped housing with a self-sealing septurn mounted thereon to define an internal chamber for receiving medication infused through the patient's skin and the septurn via a hypodermic needle or the like. A catheter mounted on the housing communicates with the internal chamber to deliver the medication to a selected site within the patient. A substantial portion of the chamber volume is occupied by inert beads which minimize the open volume of the chamber and thereby maximize medication delivery to the patient.
Inventors
- 👤 Rudolph A. Montalvo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:33
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/02; A61M39/0208; Y; Y10; Y10S; Y10S128/00; Y10S128/12
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
78 words
An implantable infusion port for subcutaneous implantation into the body of a patient, comprising: a generally cup-shaped housing having an open end; a self-sealing septum mounted on said housing over the open end thereof and cooperating therewith to define a medication chamber; catheter means connected to said housing for delivering medication from said chamber to a patient; and a plurality of substantially inert beads disposed within said chamber and occupying a substantial portion of the total chamber volume.
Claim 2
Dependent Claim
78 words
An implantable infusion port for subcutaneous implantation into the body of a patient, comprising: a generally cup-shaped housing having an open end; a self-sealing septum mounted on said housing over the open end thereof and cooperating therewith to define a medication chamber; catheter means connected to said housing for delivering medication from said chamber to a patient; and a plurality of substantially inert beads disposed within said chamber and occupying a substantial portion of the total chamber volume.
Claim 3
Dependent Claim
19 words
The implantable infusion port of claim 1 wherein said beads are formed from a relatively hard and nonbrittle material.
Claim 4
Dependent Claim
17 words
The implantable infusion port of claim 2 wherein said beads are formed from a lightweight plastic material.
Claim 5
Dependent Claim
16 words
The implantable infusion port of claim 3 wherein said beads are formed from a polyolefin material.
Claim 6
Dependent Claim
14 words
The implantable infusion port of claim 4 wherein said beads are formed from polypropylene.
Claim 7
Dependent Claim
12 words
The implantable infusion port of claim 1 wherein said beads are spheres.
Claim 8
Dependent Claim
13 words
The implantable infusion port of claim 1 wherein said beads are substantially nonporous.
Claim 9
Dependent Claim
46 words
The implantable infusion port of claim 1 wherein said housing defines an exit port, said catheter means being connected to said housing in communication with said exit port, said housing further including at least one spacer rib for preventing said beads from occluding said exit port.
Claim 10
Dependent Claim
23 words
The implantable infusion port of claim 1 wherein said beads occupy at least about fifty percent of the total volume of said chamber.
Claim 11
Dependent Claim
21 words
The implantable infusion port of claim 9 wherein said beads occupy about eighty percent of the total volume of said chamber.
Claim 12
Dependent Claim
64 words
In an infusion device for delivering a medication to a patient, said infusion device having a housing defining a chamber for receiving the medication, and an exit port formed in said housing for flow of the medication from said chamber to the patient, the improvement comprising a plurality of beads disposed within said chamber to occupy a substantial portion of the total chamber volume.
Claim 13
Dependent Claim
64 words
In an infusion device for delivering a medication to a patient, said infusion device having a housing defining a chamber for receiving the medication, and an exit port formed in said housing for flow of the medication from said chamber to the patient, the improvement comprising a plurality of beads disposed within said chamber to occupy a substantial portion of the total chamber volume.
Claim 14
Dependent Claim
57 words
The infusion device of claim 11, wherein said housing includes: a generally cup-shaped housing member having an open end, a self-sealing septum mounted on said housing member over the open end thereof and cooperating therewith to define a medication chamber, and; catheter means connected to said housing member for delivering medication from said chamber to a patient.
Claim 15
Dependent Claim
16 words
The infusion device of claim 11 wherein said beads are formed from a substantially inert material.
Claim 16
Dependent Claim
15 words
The infusion device of claim 13 wherein said beads are formed from a polyolefin material.
Claim 17
Dependent Claim
13 words
The infusion device of claim 13 wherein said beads are formed from polypropylene.
Claim 18
Dependent Claim
22 words
The infusion device of claim 11 wherein said beads occupy at least about fifty percent of the total volume of said chamber.
Claim 19
Dependent Claim
20 words
The infusion device of claim 11 wherein said beads occupy about eighty percent of the total volume of said chamber.
Claim 20
Dependent Claim
32 words
The infusion device of claim 11 wherein said housing member has said has exit port formed therein and further includes rib means for preventing occlusion of said exit port by said beads.
Claim 21
Dependent Claim
16 words
The infusion device of claim 11 wherein said beads are formed from a substantially nonporous material.
References Cited (Backward Citations)
US3910298A
Cited
US4464178A
Cited
US4790826A
Cited
US5147483A
Cited
FR2683562A1
Cited
CA2037360A1
Cited
US5207644A
Cited
US5259075A
Cited
US5249314A
Cited
US5218725A
Cited
US5387192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-12-18 | 1999-06-19 | 1999-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-18 | 2003-06-19 | 2003-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-18 | 2007-06-19 | 2007-12-19 | $7700.00 | Window Closed / Lapsed |