Patent US5417656A successfully refreshed from Google Patents.
US5417656A
Expired / Lapsed
US
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Implantable access devices
Assignee: Michigan TransTech Corp
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Filing: 1994-06-13
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Granted: 1995-05-23
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Expires: 2014-06-13
Abstract
Abstract An access port for implantation within the body of a patient for providing repeated access to a specific site within the patient and communicating with the site by an implanted internal catheter. The access ports in accordance with this invention include a housing having an inlet orifice leading to a reduced diameter guide passageway. An external filament such as a needle, guide wire, optical fiber, or external catheter can be introduced into the access device and fed through the housing. This system allows the introduction of therapeutic agents, the removal of fluids from the body, or the introduction of sensing or articulating devices to the specific site within the patient.
Inventors
- 👤 William D. Ensminger
- 👤 Robert F. Gavin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:36
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/02; A61M39/06; A61M39/0606; A61M39/0208; A61M5/00; A61M1/00; A61M1/36; A61M1/3621; A61M1/3653; A61M2039/0211; A61M2039/0214; A61M2039/062; A61M2039/0633; A61M2039/064; A61M2039/0653; A61M2039/0666; A61M2039/0673; A61M2039/0686; A61M5/178; A61M5/31; A61M5/32; A61M5/3286; A61M5/329; A61M5/3291
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
162 words
An implantable patient access port for permitting access to an internal catheter by an external filament such as a catheter, needle, wire or optical fiber comprising: a housing defining an entrance orifice and an exit orifice, a passageway communicating said entrance orifice with said exit orifice, said housing causing said filament introduced into said entrance orifice to be directed to enter and pass through said passageway, at least one articulating valve positioned within said housing passageway which normally remains closed to provide resistance to flow of fluids through said valve, yet opens to permit said filament to pass through said valve enabling said filament to communicate with said internal catheter through said exit orifice, and said housing having a tapered configuration which increases in width along smooth surfaces from said exit orifice toward said entrance orifice in a manner enabling said port to be inserted through a skin incision in a manner that the skin is stretched by insertion of said port.
Claim 2
Dependent Claim
162 words
An implantable patient access port for permitting access to an internal catheter by an external filament such as a catheter, needle, wire or optical fiber comprising: a housing defining an entrance orifice and an exit orifice, a passageway communicating said entrance orifice with said exit orifice, said housing causing said filament introduced into said entrance orifice to be directed to enter and pass through said passageway, at least one articulating valve positioned within said housing passageway which normally remains closed to provide resistance to flow of fluids through said valve, yet opens to permit said filament to pass through said valve enabling said filament to communicate with said internal catheter through said exit orifice, and said housing having a tapered configuration which increases in width along smooth surfaces from said exit orifice toward said entrance orifice in a manner enabling said port to be inserted through a skin incision in a manner that the skin is stretched by insertion of said port.
Claim 3
Dependent Claim
23 words
An implantable patient access port according to claim 1 wherein said housing is generally prism shaped having its apex at said exit orifice.
Claim 4
Dependent Claim
27 words
An implantable patient access port according to claim 1 wherein said entrance orifice has a cross-sectional open area which decreases from said entrance orifice to said passageway.
Claim 5
Dependent Claim
19 words
An implantable patient access port according to claim 1 wherein said housing increases in width to a maximum width.
Claim 6
Dependent Claim
26 words
An implantable patient access port according to claim 1 wherein said housing increases in height along smooth surfaces from said exit orifice toward said entrance orifice.
Claim 7
Dependent Claim
25 words
An implantable patient access port according to claim 5 wherein said housing increases in height to a maximum height between said exit and entrance orifice.
Claim 8
Dependent Claim
143 words
An implantable patient access port for permitting access to an internal catheter by a filament such as an external catheter, needle, wire or optical fiber comprising: a housing defining an entrance orifice and an exit orifice, a passageway communicating said entrance orifice with said exit orifice, said housing causing a filament introduced into said entrance orifice to be directed to enter and pass through said passageway; and means for inserting said port through a skin incision in a patient having a width being less than a maximum width of said port, said inserting means including a tapered configuration of said housing which smoothly increases in width from said exit orifice along smooth surfaces toward said entrance orifice in a manner such that said skin incision is stretched by insertion of said port until enabling said port to be inserted through said skin incision.
Claim 9
Dependent Claim
143 words
An implantable patient access port for permitting access to an internal catheter by a filament such as an external catheter, needle, wire or optical fiber comprising: a housing defining an entrance orifice and an exit orifice, a passageway communicating said entrance orifice with said exit orifice, said housing causing a filament introduced into said entrance orifice to be directed to enter and pass through said passageway; and means for inserting said port through a skin incision in a patient having a width being less than a maximum width of said port, said inserting means including a tapered configuration of said housing which smoothly increases in width from said exit orifice along smooth surfaces toward said entrance orifice in a manner such that said skin incision is stretched by insertion of said port until enabling said port to be inserted through said skin incision.
Claim 10
Dependent Claim
30 words
An implantable patient access port according to claim 7 wherein said housing increases in width to a maximum width, said maximum width being achieved between said entrance and exit orifices.
Claim 11
Dependent Claim
36 words
An implantable patient access port according to claim 7 wherein said housing increases in height along smooth surfaces from said exit orifice toward said entrance orifice reaching a maximum height between said exit and entrance orifices.
Claim 12
Dependent Claim
27 words
An implantable patient access port according to claim 7 wherein said housing includes a surface defining a generally planar base extending between said exit and entrance orifices.
Claim 13
Dependent Claim
25 words
An implantable patient access port according to claim 10 wherein said base is generally triangular in shape with its apex adjacent to said exit orifice.
Claim 14
Dependent Claim
19 words
An implantable patient access port according to claim 7 wherein said housing includes at least one generally triangular wall.
Claim 15
Dependent Claim
40 words
An implantable patient access port according the claim 7 wherein said housing includes at least two triangular walls extending upward from a planar base and meeting generally in a point, said triangular walls defining the height of said access port.
Claim 16
Dependent Claim
18 words
An implantable patient access port according to claim 7 wherein said housing is generally a tetrahedron in shape.
Claim 17
Dependent Claim
27 words
An implantable patient access port according to claim 7 further comprising means for preventing movement of said access port when positioned within the body of a patient.
Claim 18
Dependent Claim
21 words
An implantable patient access port according to claim 15 wherein said means for preventing movement includes the shape of said housing.
Claim 19
Dependent Claim
28 words
An implantable patient access port according to claim 16 wherein said housing is asymmetrical when viewed in side elevation about a vertical axis extending through said access port.
Claim 20
Dependent Claim
27 words
An implantable patient access port according to claim 17 wherein said housing is symmetrical when viewed in top plan about a line extending through said exit orifice.
Claim 21
Dependent Claim
27 words
An implantable patient access port according to claim 18 wherein said housing is symmetrical when viewed in front elevation about a line extending through said exit orifice.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-05-22 | 1998-11-21 | 1999-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-22 | 2002-11-21 | 2003-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-22 | 2006-11-21 | 2007-05-23 | $7700.00 | Window Closed / Lapsed |