US5871500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pre-slit injection site and tapered cannula
Assignee: Baxter International Inc
•
Filing: 1996-01-05
•
Granted: 1999-02-16
•
Expires: 2016-01-05
Abstract
Abstract A pre-slit injection site includes a housing with a flow path therethrough. A first end of the housing carries a pre-slit septum. One form of a blunt cannula, usable with the injection site, carries a locking member. When the pre-slit injection site slidably receives the blunt cannula, the locking member latches to the injection site and creates a mechanically coupled unit. Another form of the cannula includes a tube having a tapered distal end region and having elongate discharge slots for reducing contact surface area and for directing the flow laterally out of the cannula. The cannula may also include a rounded lead post, an annular barb, and axially oriented grooves.
Inventors
- 👤 Steven C. Jepson
- 👤 Thomas E. Dudar
- 👤 Brian D. Zdeb
- 👤 Vince C. Desecki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:51
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/10; A61M39/1011; A61J; A61J1/00; A61J1/14; A61J1/20; A61J1/2089; A61J1/2096; A61M39/02; A61M39/04; A61M39/045; A61M39/14; A61M5/00; A61M5/14; A61M5/162; A61J1/05; A61J1/10; A61J1/1406; A61J1/1475; A61J1/2003; A61J1/2006; A61J1/201; A61J1/202; A61J1/2037; A61J1/2044; A61J1/2048; A61J1/2055; A61J2200/00; A61J2200/10; A61M2039/1072; A61M2039/1077; A61M2205/00; A61M2205/19; A61M2205/192; A61M2205/195; A61M2205/197; A61M39/1033
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
137 words
A cannula and injection site in combination comprising: an injection site having a housing defining a fluid flow path therein and having a penetrable sealing means for sealing said housing; a cannula having at least one tube defining a fluid flow path therein, said tube extending through said sealing means to establish a sealed fluid flow connection with said injection site, said tube having a distal end region extending beyond said injection site and having a tapered surface on said distal end region; and said tube defining in said distal end region a plurality of elongate slots oriented parallel to said fluid flow path, each slot extending from said flow path to the exterior of said tube thereby decreasing the exterior contact surface area of said tube and accommodating a lateral discharge of fluid from said tube.
Claim 2
Dependent Claim
137 words
A cannula and injection site in combination comprising: an injection site having a housing defining a fluid flow path therein and having a penetrable sealing means for sealing said housing; a cannula having at least one tube defining a fluid flow path therein, said tube extending through said sealing means to establish a sealed fluid flow connection with said injection site, said tube having a distal end region extending beyond said injection site and having a tapered surface on said distal end region; and said tube defining in said distal end region a plurality of elongate slots oriented parallel to said fluid flow path, each slot extending from said flow path to the exterior of said tube thereby decreasing the exterior contact surface area of said tube and accommodating a lateral discharge of fluid from said tube.
Claim 3
Dependent Claim
82 words
An injection site adapted for use with a blunt cannula comprising: a pre-slit septum axially compressed within a housing and having an easily wipeable outer surface, the septum having a sufficient thickness to seal completely around the blunt cannula upon insertion; the housing having an end circumjacent the septum, the end having a portion that extends radially inward and applies an axial compressive force to the septum; and, a luer-type fitting carried by the housing at a housing end opposite the septum.
Claim 4
Dependent Claim
82 words
An injection site adapted for use with a blunt cannula comprising: a pre-slit septum axially compressed within a housing and having an easily wipeable outer surface, the septum having a sufficient thickness to seal completely around the blunt cannula upon insertion; the housing having an end circumjacent the septum, the end having a portion that extends radially inward and applies an axial compressive force to the septum; and, a luer-type fitting carried by the housing at a housing end opposite the septum.
Claim 5
Dependent Claim
13 words
The injection site of claim 2 wherein the portion forms a radiused corner.
Claim 6
Dependent Claim
15 words
The injection site of claim 2 wherein the easily wipeable outer surface is dome shaped.
Claim 7
Dependent Claim
15 words
The injection site of claim 2 wherein the easily wipeable outer surface is substantially flat.
Claim 8
Dependent Claim
65 words
The injection site of claim 2 wherein the portion of the end of the housing comprises a radially inward extending portion having a thickness in the axial direction, and wherein a distance from an axial outermost portion of the end of the housing to at least a portion of the easily wipeable outer surface is less than the thickness of the radially inward extending portion.
Claim 9
Dependent Claim
15 words
The injection site of claim 6 wherein the easily wipeable outer surface is dome shaped.
Claim 10
Dependent Claim
15 words
The injection site of claim 6 wherein the easily wipeable outer surface is substantially flat.
Claim 11
Dependent Claim
21 words
The injection site of claim 2 wherein a thickest portion of the septum in the axial direction comprises a resealable opening.
Claim 12
Dependent Claim
43 words
The injection site of claim 2 wherein the septum has a resealable opening and the septum is in fluid sealing contact with the blunt cannula along substantially an entire length of the resealable opening when the blunt cannula is inserted through the septum.
Claim 13
Dependent Claim
170 words
An injection site adapted to be used with a blunt cannula comprising: a housing defining a fluid flow channel therethrough, the housing having a first end and a second end; a resilient sealing member, carried by the housing overlying the channel for sealing the first end, the sealing member being formed with a resealable opening therein extending at least partway therethrough and having an exterior peripheral surface, the sealing member having a thickness that is sufficient to seal completely around the blunt cannula upon insertion; the housing having an end circumjacent the exterior peripheral surface, the end having a portion that extends radially inward and applies an axial compressive force to the sealing member which generates resealing radial forces to urge the resealable opening into a closed condition; a slidably engageable connector member at the second end and in fluid communication with the flow channel; and, a threaded connector carried by the housing at the second end, the threaded connector being spaced radially outward from the slidably engageable connector member.
Claim 14
Dependent Claim
170 words
An injection site adapted to be used with a blunt cannula comprising: a housing defining a fluid flow channel therethrough, the housing having a first end and a second end; a resilient sealing member, carried by the housing overlying the channel for sealing the first end, the sealing member being formed with a resealable opening therein extending at least partway therethrough and having an exterior peripheral surface, the sealing member having a thickness that is sufficient to seal completely around the blunt cannula upon insertion; the housing having an end circumjacent the exterior peripheral surface, the end having a portion that extends radially inward and applies an axial compressive force to the sealing member which generates resealing radial forces to urge the resealable opening into a closed condition; a slidably engageable connector member at the second end and in fluid communication with the flow channel; and, a threaded connector carried by the housing at the second end, the threaded connector being spaced radially outward from the slidably engageable connector member.
Claim 15
Dependent Claim
25 words
The injection site of claim 11 wherein the portion of the end of the housing extends from an axial direction to a radially inward direction.
Claim 16
Dependent Claim
82 words
An injection site adapted for use with a blunt cannula comprising: a housing defining a fluid flow path through the housing; and, a resealable septum contained within the housing and fluidly sealing the fluid flow path, the septum having a resealable opening having an axial length through the septum, wherein the septum is capable of maintaining fluid sealing contact with the blunt cannula along substantially the entire axial length of the resealable opening when the blunt cannula is inserted through the septum.
Claim 17
Dependent Claim
82 words
An injection site adapted for use with a blunt cannula comprising: a housing defining a fluid flow path through the housing; and, a resealable septum contained within the housing and fluidly sealing the fluid flow path, the septum having a resealable opening having an axial length through the septum, wherein the septum is capable of maintaining fluid sealing contact with the blunt cannula along substantially the entire axial length of the resealable opening when the blunt cannula is inserted through the septum.
Claim 18
Dependent Claim
51 words
The injection site of claim 13 wherein the septum has a sealing surface defined by the resealable opening, the sealing surface extends in an axial direction prior to insertion of the blunt cannula through the septum and remains in the axial direction after insertion of the blunt cannula through the septum.
Claim 19
Dependent Claim
23 words
The injection site of claim 13 wherein the axial length of the resealable opening increases when the cannula is inserted through the septum.
Claim 20
Dependent Claim
25 words
The injection site of claim 13 wherein the septum further comprises an easily wipeable outer surface proximate an axially outermost portion of a housing end.
Claim 21
Dependent Claim
60 words
The injection site of claim 16 wherein the axially outermost portion of the housing end comprises a radially inward extending portion having a thickness in the axial direction, and wherein a distance from an axially outermost surface of the radially inward extending portion to the easily wipeable outer surface is less than the thickness of the radially inward extending portion.
Claim 22
Dependent Claim
15 words
The injection site of claim 17 wherein the easily wipeable outer surface is dome shaped.
Claim 23
Dependent Claim
15 words
The injection site of claim 17 wherein the easily wipeable outer surface is substantially flat.
Claim 24
Dependent Claim
34 words
The injection site of claim 13 wherein the housing further comprises an end circumjacent the septum, the end having a portion that extends radially inward and applies an axial compressive force to the septum.
Claim 25
Dependent Claim
13 words
The injection site of claim 20 wherein the portion forms a radiused corner.
Claim 26
Dependent Claim
64 words
An injection site adapted for use with a blunt cannula comprising: a housing defining a fluid flow path through the housing; a pre-slit, resealable septum contained within the housing and fluidly sealing the fluid flow path, the septum having an easily wipeable outer surface proximate an axially outermost portion of a housing end; and, a housing end opposite the septum carrying a fluid coupling.
Claim 27
Dependent Claim
64 words
An injection site adapted for use with a blunt cannula comprising: a housing defining a fluid flow path through the housing; a pre-slit, resealable septum contained within the housing and fluidly sealing the fluid flow path, the septum having an easily wipeable outer surface proximate an axially outermost portion of a housing end; and, a housing end opposite the septum carrying a fluid coupling.
Claim 28
Dependent Claim
15 words
The injection site of claim 22 wherein the easily wipeable outer surface is dome shaped.
Claim 29
Dependent Claim
15 words
The injection site of claim 22 wherein the easily wipeable outer surface is substantially flat.
Claim 30
Dependent Claim
67 words
The injection site of claim 22 wherein the housing end comprises a radially extending inward portion that applies an axially compressive force to the septum, the radially extending inward portion having a thickness in the axial direction, and wherein a distance from the axially outermost portion of the housing end to the easily wipeable outer surface is less than the thickness of the radially extending inward portion.
Claim 31
Dependent Claim
14 words
The injection site of claim 22 wherein the fluid coupling comprises a luer-type fitting.
Claim 32
Dependent Claim
97 words
An injection site for use with a blunt cannula comprising: a housing having an annular ridge which defines an annular channel, the annular channel positioned radially outward from and adjacent to the annular ridge, the annular channel and the annular ridge having substantially equal axial heights; and, a pre-slit septum axially compressed between a housing end and the annular ridge, wherein the septum is moveable from a first position contacting the annular ridge and outside the annular channel prior to compression to a second position contacting the annular ridge and extending into the annular channel after compression.
Claim 33
Dependent Claim
97 words
An injection site for use with a blunt cannula comprising: a housing having an annular ridge which defines an annular channel, the annular channel positioned radially outward from and adjacent to the annular ridge, the annular channel and the annular ridge having substantially equal axial heights; and, a pre-slit septum axially compressed between a housing end and the annular ridge, wherein the septum is moveable from a first position contacting the annular ridge and outside the annular channel prior to compression to a second position contacting the annular ridge and extending into the annular channel after compression.
Claim 34
Dependent Claim
28 words
The injection site of claim 27 wherein the septum moves from the second position farther into the annular channel when the blunt cannula is inserted through the septum.
References Cited (Backward Citations)
US1180665A
Cited
DE441387C
Cited
US2183900A
Cited
US2325929A
Cited
US2579724A
Cited
US2436291A
Cited
US2546672A
Cited
US2579725A
Cited
US2577780A
Cited
US2908274A
Cited
US2989053A
Cited
US2912980A
Cited
GB893754A
Cited
FR1171578A
Cited
US3057350A
Cited
CH361364A
Cited
US2998635A
Cited
US3064652A
Cited
FR1373027A
Cited
US3233727A
Cited
US3245698A
Cited
US3313299A
Cited
US3332418A
Cited
GB1078650A
Cited
US3376866A
Cited
US3394954A
Cited
US3577992A
Cited
US3478743A
Cited
US3447570A
Cited
US3598124A
Cited
US3593909A
Cited
US3604420A
Cited
CA964544A
Cited
US3695478A
Cited
US3602009A
Cited
US3848593A
Cited
US3741217A
Cited
US3770155A
Cited
US3746001A
Cited
US3776229A
Cited
US3729032A
Cited
US3729031A
Cited
US3904059A
Cited
US3768473A
Cited
US3823840A
Cited
US3837381A
Cited
US3851647A
Cited
US3853127A
Cited
US3986508A
Cited
DE7443346U
Cited
US3900028A
Cited
CA1043744A
Cited
US3976073A
Cited
US3994293A
Cited
US4000740A
Cited
US3995630A
Cited
US3977400A
Cited
US3990445A
Cited
US4000739A
Cited
US4048995A
Cited
US4130932A
Cited
US4048996A
Cited
US4066556A
Cited
US4134512A
Cited
US4127131A
Cited
US4259276A
Cited
US4143853A
Cited
US4123081A
Cited
US4360024A
Cited
US4197848A
Cited
US4177814A
Cited
US4243150A
Cited
US4133441A
Cited
US4405316A
Cited
US4387879A
Cited
US4205675A
Cited
US4276170A
Cited
US4219912A
Cited
GB2033230A
Cited
FR2439022B1
Cited
US4243034A
Cited
US4246899A
Cited
US4232669A
Cited
US4236880A
Cited
US4322201A
Cited
US4277226A
Cited
US4362156A
Cited
US4334551A
Cited
EP0021405A1
Cited
US4331254A
Cited
US4294249A
Cited
US4289129A
Cited
US4372100A
Cited
US4434822A
Cited
US4496348A
Cited
GB2067075B
Cited
US4303067A
Cited
US4326569A
Cited
GB2143134B
Cited
US4311137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-02-15 | 2002-08-17 | 2003-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-02-15 | 2006-08-17 | 2007-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-02-15 | 2010-08-17 | 2011-02-16 | $7700.00 | Window Closed / Lapsed |