US20170043152A1 - Low Profile Venous Access Port Assembly - Google Patents
Low Profile Venous Access Port Assembly Download PDFInfo
- Publication number
- US20170043152A1 US20170043152A1 US15/335,484 US201615335484A US2017043152A1 US 20170043152 A1 US20170043152 A1 US 20170043152A1 US 201615335484 A US201615335484 A US 201615335484A US 2017043152 A1 US2017043152 A1 US 2017043152A1
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- United States
- Prior art keywords
- cap
- housing
- venous access
- access port
- port assembly
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/02—Access sites
- A61M39/0208—Subcutaneous access sites for injecting or removing fluids
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/02—Access sites
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M2039/0036—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use characterised by a septum having particular features, e.g. having venting channels or being made from antimicrobial or self-lubricating elastomer
- A61M2039/0063—Means for alignment of the septum, e.g. septum rim with alignment holes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M2039/0036—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use characterised by a septum having particular features, e.g. having venting channels or being made from antimicrobial or self-lubricating elastomer
- A61M2039/0072—Means for increasing tightness of the septum, e.g. compression rings, special materials, special constructions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/02—Access sites
- A61M39/0208—Subcutaneous access sites for injecting or removing fluids
- A61M2039/0223—Subcutaneous access sites for injecting or removing fluids having means for anchoring the subcutaneous access site
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/02—Access sites
- A61M39/0208—Subcutaneous access sites for injecting or removing fluids
- A61M2039/0229—Subcutaneous access sites for injecting or removing fluids having means for facilitating assembling, e.g. snap-fit housing or modular design
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/02—Access sites
- A61M39/0247—Semi-permanent or permanent transcutaneous or percutaneous access sites to the inside of the body
- A61M2039/027—Semi-permanent or permanent transcutaneous or percutaneous access sites to the inside of the body having a particular valve, seal or septum
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/10—Tube connectors; Tube couplings
- A61M2039/1072—Tube connectors; Tube couplings with a septum present in the connector
Definitions
- This relates to the field of medical devices and more particularly to catheter assemblies and ports therefor, for the infusion of fluids into the patient and withdrawal of fluids from the patient.
- Infusion ports for the infusion and/or withdrawal of fluids from a patient are wellknown, secured to the proximal end of an implanted catheter. These ports are typically used for drug infusion or small amounts of blood withdrawal, where large flows of fluid are not required.
- the ports are assemblies of a needle-impenetrable housing with a discharge port in fluid communication with the catheter and the reservoir within the port housing, and provide a subcutaneous self-sealing septum that defines an access site for multiple needle sticks through the covering skin tissue of the patient, through the septum and into the reservoir, without the need to continuously search for new access sites. Examples of such ports are disclosed, for example, in U.S. Pat. Nos. 4,704,103; 4,762,517; 4,778,452; 5,185,003; 5,213,574 and 5,637,102.
- the present invention is a venous access port having a housing and a septum, providing an interior reservoir and a passageway extending from the reservoir through a stem of a discharge port to establish fluid communication with a proximal end of a catheter lumen to which the port assembly is secured prior to placement of the assembly into a patient.
- the housing includes a base and a cap that together cooperate to secure a needle-penetrable septum within the assembly by compressing a seating flange of the septum in a seat of the housing base.
- the cap is mechanically secured to the housing base by a mechanical joint, preferably a retention rib of one of the housing base and cap extending radially outwardly to be received into a retention groove along the inside surface of the other of the housing base and cap in a snap fit, extending around most of the circumference of the port assembly.
- solvent bonding is also provided between adjacent surfaces of the housing base and cap.
- the cap and housing base and septum are reduced in height from conventional ports to define a low profile venous access port assembly.
- a pair of horizontal retention ribs are defined on the cap's interior surface
- a complementary pair of retention grooves are defined on the housing base's exterior surface. Due to manufacturing tolerances, a certain incremental “play” or gapping occurs between the facing surfaces of the cap and the housing base, and a plurality of crush ribs are provided along the interior surfaces of the cap, oriented vertically which minimize the effects of this “play.”
- the outer surface of the housing base crushes the crush ribs during the very final stages of the mechanical securing process; but the crush ribs serve to precisely center the housing base within the cap are within the incremental “play” or gapping.
- solvent is applied to several selected surfaces of the housing base exterior and the cap's interior, and the crush ribs facilitate solvent wicking to the surfaces of the interface, resulting in a superior bond between the cap and the housing base.
- FIGS. 1 to 3 are isometric, elevation and top views of the venous access port of the present invention.
- FIG. 4 is a longitudinal cross-section view of the port of FIG. 1 taken along lines 4 - 4 of FIG. 3 ;
- FIG. 5 is a cross-section views of the septum of FIGS. 1 to 4 :
- FIG. 6 is an enlarged isometric view of the discharge stem of the port of FIGS. 1 to 4 ;
- FIGS. 7 and 8 are isometric views of the housing base and the cap, respectively, of the venous access port of FIGS. 1 to 4 ;
- FIG. 9 is a transverse cross-sectional view of the cap of FIG. 8 ;
- FIG. 10 is a bottom of the cap of FIGS. 8 and 9 ;
- FIG. 11 is an enlarged view of a portion of the cap taken along lines 11 - 11 of FIG. 10 .
- distal and proximal refer, respectively, to directions closer to and away from the insertion tip of a catheter in an implantable catheter assembly.
- the terminology includes the words specifically mentioned, derivatives thereof and words of similar import.
- the embodiments illustrated below are not intended to be exhaustive or to limit the invention to the precise form disclosed. These embodiments are chosen and described to best explain the principle of the invention and its application and practical use and to enable others skilled in the art to best utilize the invention.
- Venous access port assembly 10 of FIGS. 1 to 4 includes a housing 12 and a septum 14 , with a discharge stem 16 extending from a distal end 18 of the port assembly 10 ; discharge stem 16 is to be attached securely and sealingly to the proximal end of a catheter (not shown) such as by a locking sleeve or clamp (not shown).
- a passageway 20 extends from the interior reservoir 22 to the distal tip opening 24 of discharge stem 16 , along the longitudinal port axis.
- a recess 26 is seen to be provided along both sides of discharge port 16 , facilitating insertion of the discharge stem 16 into the catheter lumen and providing a clearance for a locking sleeve or clamp (not shown) utilized to compress the catheter lumen wall against the exterior surface of the discharge port 16 for assured sealed connection of the catheter with the port assembly 10 .
- Housing 12 is shown to include a housing base 28 of needleimpenetrable material that includes a well 30 having a bottom floor 32 and side walls 34 that define the interior reservoir 22 beneath septum 14 .
- Cap 36 is securable to housing base 28 to, in tum, secure septum 14 in position in the port assembly 10 .
- Cap 36 is described in greater particularity with respect to FIGS. 8 to 11 .
- Cap 36 includes a base flange 38 extending radially outwardly from the bottom of well 30 of housing base 28 , and base flange 38 includes openings 40 that serve to enable suturing to the patient upon placement of the venous access port and the attached catheter into the patient.
- Septum 14 is shown in FIG. 5 and is seen to have a flattened top surface 42 and an annular seating flange 44 .
- Seating flange 44 is disposed upon a flange seat of housing base 28 , preferably under radially inward compression. Vertical compression of seating flange 44 is also attained when cap 36 is snapped onto housing base 28 , compressing seating flange 44 against flange seat 46 , as seen in FIG. 4 .
- seating flange 44 is seen to have rounded ridges 48 , 50 disposed on the upper and lower surfaces of seating flange 44 and extending completely around the septum, and are vertically co-aligned. The pair of rounded ridges 48 , 50 focuses greater compression circumferentially completely around the upper and lower surfaces of seating flange 44 upon assembly to assure sealing with respect to cap 36 and housing base 28 , and sealing the reservoir 22 .
- discharge stem 16 which comprises a discrete component such as of titanium metal, that is insert molded to housing base 28 .
- Discharge stem 16 is shown to have a pair of axially spaced, annular, rounded, atraumatic ridges 52 that facilitate the mechanical connection of the catheter proximal end with the port assembly 10 .
- Housing base 28 is shown in FIG. 7 with discharge stem 16 already insert molded thereto. Its top surface is the flange seat 46 for septum flange 44 .
- a pair of grooves 54 are defined into side surface 56 of housing base 28 on opposite sides thereof and comprise a first retention section of the mechanical snap-fit joint between the cap and the housing base upon assembly.
- Adjacent the bottom surface of the housing base, and on the side opposite the discharge stem 16 is a tab 58 that facilitates the appropriate orientation of the housing base to the cap during assembly, in cooperation with tab-receiving recess 60 of cap 36 (see FIGS. 9 and 10 ).
- Cap 36 is illustrated in FIGS. 8 to 11 and includes a top portion 62 that is generously rounded and is preferably dimensioned to extend at least as high as the septum's top surface 42 .
- Cap 36 also includes an annular side wall 64 that slopes downwardly and radially outwardly to skirt 38 adjacent cap bottom surface 66 .
- Top portion 62 extends radially inwardly to cover seating flange 44 of septum 14 when assembled.
- An interior cavity 68 of cap 36 is shaped and dimensioned to receive thereinto both seating flange 44 of septum 14 and the upper portion of side wall 56 of housing base 28 .
- Tab-receiving recess 60 is positioned opposite the distal opening for discharge stem 16 , for receipt thereinto of tab 58 of the housing base to appropriately orient the housing base and the cap for optimum functioning of the mechanical fastening system described below.
- a second retention section a pair of retention ribs 70 , is provided on the cap 36 around the greater part of the side surface of interior cavity 68 that corresponds with and is complementary to the first retention section or retention grooves 54 of housing base 28 , discussed above with reference to FIG. 7 .
- Retention ribs 70 and retention grooves 54 provide a snap fit, assuredly mechanically securing cap 36 to housing base 28 .
- retention ribs 70 may each have a radius of about 0.010 in (0.254 mm) and retention grooves 54 may have a radius of about 0.015 in (0.381 mm).
- the retention ribs 70 of the cap comprise two coplanar horizontal portions equi-angularly spaced apart from each other, each extending circumferentially an angular distance between about 60° to 100° and more preferably between about 80° and 90° along the cap's interior surface; and the retention grooves 54 of the housing base 28 comprises two coplanar horizontal portions equi-angularly spaced apart from each other, each extending circumferentially an angular distance greater than that of the robs, and thus between about 70° to 110° and more preferably between about 85° to 95°.
- a solvent bond is preferably formed between the facing surfaces of the septum, cap and housing base.
- the advantages of the mechanical retention of the cap to the housing base include assured securement of the cap and the housing base, in addition to the bonding thereof.
- Another advantage is more efficiency in the manufacturing of the venous access port assembly, and resultant economy: since the septum flange is under compression upon and after assembly, and since bonding is performed to further secure and seal the cap to the housing base, the mechanical lock holds the cap appropriately to the housing base while simultaneously maintaining appropriate compression of the septum flange, thus eliminating the necessity of tooling fixtures that otherwise would be needed to hold the three parts together until the bonding material fully cures.
- the present invention further includes providing a centering system operating to precisely center the housing base 28 within interior cavity 68 of cap 36 when being fastened together during assembly.
- a plurality of vertical crush ribs 72 are defined on one of the housing base and the cap at the interface therebetween.
- the crush ribs 72 are provided on the interior surface of cap 36 at angularly spaced locations thereabout, and further, preferably, crush ribs 72 are offset angularly from the retention ribs 70 .
- the crush ribs of the present invention take up any looseness, slack or incremental “play” between the housing base and the cap due to manufacturing tolerances, and further improve the solvent bond by assuring an evenly circumferentially distributed incremental gap at the interface between the housing base and the cap facilitating maximum wicking of the solvent to adjacent surfaces at the interface.
- each crush rib 72 are each positioned at an angular distance a from the longitudinal port axis on either side, such as 35°, as seen in FIG. 10 .
- each crush rib may have a very small radius of about 0.005 in (0.127 mm).
- the solvent may be, for example, tetrahydrofuran, and beads thereof may be provided on selected surface portions of the cap and the housing base along the interface there between, including, for example, the outer periphery of top cap surface 46 , the top of tab 58 , the bottom portion of housing base side wall 56 , and, after assembly, along the bottom surface of the assembly at the small cap/base interface gap.
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- Animal Behavior & Ethology (AREA)
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Abstract
Description
- This application claims priority from U.S. Provisional Patent Application Ser. No. 60/936,849 filed Jun. 22, 2007.
- This relates to the field of medical devices and more particularly to catheter assemblies and ports therefor, for the infusion of fluids into the patient and withdrawal of fluids from the patient.
- Infusion ports for the infusion and/or withdrawal of fluids from a patient are wellknown, secured to the proximal end of an implanted catheter. These ports are typically used for drug infusion or small amounts of blood withdrawal, where large flows of fluid are not required. The ports are assemblies of a needle-impenetrable housing with a discharge port in fluid communication with the catheter and the reservoir within the port housing, and provide a subcutaneous self-sealing septum that defines an access site for multiple needle sticks through the covering skin tissue of the patient, through the septum and into the reservoir, without the need to continuously search for new access sites. Examples of such ports are disclosed, for example, in U.S. Pat. Nos. 4,704,103; 4,762,517; 4,778,452; 5,185,003; 5,213,574 and 5,637,102.
- It is desired to provide a venous access port assembly that is assuredly secured together in an assuredly sealed manner.
- The present invention is a venous access port having a housing and a septum, providing an interior reservoir and a passageway extending from the reservoir through a stem of a discharge port to establish fluid communication with a proximal end of a catheter lumen to which the port assembly is secured prior to placement of the assembly into a patient. The housing includes a base and a cap that together cooperate to secure a needle-penetrable septum within the assembly by compressing a seating flange of the septum in a seat of the housing base. The cap is mechanically secured to the housing base by a mechanical joint, preferably a retention rib of one of the housing base and cap extending radially outwardly to be received into a retention groove along the inside surface of the other of the housing base and cap in a snap fit, extending around most of the circumference of the port assembly. Preferably, solvent bonding is also provided between adjacent surfaces of the housing base and cap. The cap and housing base and septum are reduced in height from conventional ports to define a low profile venous access port assembly.
- In a preferred embodiment of the present invention, a pair of horizontal retention ribs are defined on the cap's interior surface, a complementary pair of retention grooves are defined on the housing base's exterior surface. Due to manufacturing tolerances, a certain incremental “play” or gapping occurs between the facing surfaces of the cap and the housing base, and a plurality of crush ribs are provided along the interior surfaces of the cap, oriented vertically which minimize the effects of this “play.” During assembly of the cap to the housing base, the outer surface of the housing base crushes the crush ribs during the very final stages of the mechanical securing process; but the crush ribs serve to precisely center the housing base within the cap are within the incremental “play” or gapping. Just prior to mechanical assembly, solvent is applied to several selected surfaces of the housing base exterior and the cap's interior, and the crush ribs facilitate solvent wicking to the surfaces of the interface, resulting in a superior bond between the cap and the housing base.
- The accompanying drawings, which are incorporated herein and constitute part of this specification, illustrate the presently preferred embodiments of the invention, and, together with the general description given above and the detailed description given below, serve to explain the features of the invention. In the drawings:
-
FIGS. 1 to 3 are isometric, elevation and top views of the venous access port of the present invention; -
FIG. 4 is a longitudinal cross-section view of the port ofFIG. 1 taken along lines 4-4 ofFIG. 3 ; -
FIG. 5 is a cross-section views of the septum ofFIGS. 1 to 4 : -
FIG. 6 is an enlarged isometric view of the discharge stem of the port ofFIGS. 1 to 4 ; -
FIGS. 7 and 8 are isometric views of the housing base and the cap, respectively, of the venous access port ofFIGS. 1 to 4 ; - 10.
-
FIG. 9 is a transverse cross-sectional view of the cap ofFIG. 8 ; -
FIG. 10 is a bottom of the cap ofFIGS. 8 and 9 ; and -
FIG. 11 is an enlarged view of a portion of the cap taken along lines 11-11 ofFIG. 10 . - Certain terminology is used herein for convenience only and is not to be taken as a limitation on the present invention. The terms “distal” and “proximal” refer, respectively, to directions closer to and away from the insertion tip of a catheter in an implantable catheter assembly. The terminology includes the words specifically mentioned, derivatives thereof and words of similar import. The embodiments illustrated below are not intended to be exhaustive or to limit the invention to the precise form disclosed. These embodiments are chosen and described to best explain the principle of the invention and its application and practical use and to enable others skilled in the art to best utilize the invention.
- Venous
access port assembly 10 ofFIGS. 1 to 4 includes ahousing 12 and aseptum 14, with adischarge stem 16 extending from adistal end 18 of theport assembly 10;discharge stem 16 is to be attached securely and sealingly to the proximal end of a catheter (not shown) such as by a locking sleeve or clamp (not shown). Apassageway 20 extends from the interior reservoir 22 to the distal tip opening 24 ofdischarge stem 16, along the longitudinal port axis. Arecess 26 is seen to be provided along both sides ofdischarge port 16, facilitating insertion of thedischarge stem 16 into the catheter lumen and providing a clearance for a locking sleeve or clamp (not shown) utilized to compress the catheter lumen wall against the exterior surface of thedischarge port 16 for assured sealed connection of the catheter with theport assembly 10. - With reference now to
FIG. 4 , the interior of theport assembly 10 is shown to provide an interior reservoir 22.Housing 12 is shown to include ahousing base 28 of needleimpenetrable material that includes a well 30 having abottom floor 32 and side walls 34 that define the interior reservoir 22 beneathseptum 14.Cap 36 is securable tohousing base 28 to, in tum, secureseptum 14 in position in theport assembly 10.Cap 36 is described in greater particularity with respect toFIGS. 8 to 11 .Cap 36 includes abase flange 38 extending radially outwardly from the bottom of well 30 ofhousing base 28, andbase flange 38 includesopenings 40 that serve to enable suturing to the patient upon placement of the venous access port and the attached catheter into the patient. - Septum 14 is shown in
FIG. 5 and is seen to have a flattenedtop surface 42 and anannular seating flange 44.Seating flange 44 is disposed upon a flange seat ofhousing base 28, preferably under radially inward compression. Vertical compression ofseating flange 44 is also attained whencap 36 is snapped ontohousing base 28, compressingseating flange 44 against flange seat 46, as seen inFIG. 4 . Also,seating flange 44 is seen to haverounded ridges seating flange 44 and extending completely around the septum, and are vertically co-aligned. The pair ofrounded ridges seating flange 44 upon assembly to assure sealing with respect tocap 36 andhousing base 28, and sealing the reservoir 22. - In
FIG. 6 is seendischarge stem 16 which comprises a discrete component such as of titanium metal, that is insert molded tohousing base 28.Discharge stem 16 is shown to have a pair of axially spaced, annular, rounded,atraumatic ridges 52 that facilitate the mechanical connection of the catheter proximal end with theport assembly 10. -
Housing base 28 is shown inFIG. 7 withdischarge stem 16 already insert molded thereto. Its top surface is the flange seat 46 forseptum flange 44. A pair of grooves 54 are defined intoside surface 56 ofhousing base 28 on opposite sides thereof and comprise a first retention section of the mechanical snap-fit joint between the cap and the housing base upon assembly. Adjacent the bottom surface of the housing base, and on the side opposite thedischarge stem 16 is a tab 58 that facilitates the appropriate orientation of the housing base to the cap during assembly, in cooperation with tab-receiving recess 60 of cap 36 (seeFIGS. 9 and 10 ). -
Cap 36 is illustrated inFIGS. 8 to 11 and includes atop portion 62 that is generously rounded and is preferably dimensioned to extend at least as high as the septum'stop surface 42.Cap 36 also includes anannular side wall 64 that slopes downwardly and radially outwardly to skirt 38 adjacentcap bottom surface 66.Top portion 62 extends radially inwardly to coverseating flange 44 ofseptum 14 when assembled. Aninterior cavity 68 ofcap 36 is shaped and dimensioned to receive thereinto bothseating flange 44 ofseptum 14 and the upper portion ofside wall 56 ofhousing base 28. Tab-receiving recess 60 is positioned opposite the distal opening fordischarge stem 16, for receipt thereinto of tab 58 of the housing base to appropriately orient the housing base and the cap for optimum functioning of the mechanical fastening system described below. - A second retention section, a pair of
retention ribs 70, is provided on thecap 36 around the greater part of the side surface ofinterior cavity 68 that corresponds with and is complementary to the first retention section or retention grooves 54 ofhousing base 28, discussed above with reference toFIG. 7 .Retention ribs 70 and retention grooves 54 provide a snap fit, assuredly mechanically securingcap 36 tohousing base 28. Preferably,retention ribs 70 may each have a radius of about 0.010 in (0.254 mm) and retention grooves 54 may have a radius of about 0.015 in (0.381 mm). Preferably, theretention ribs 70 of the cap comprise two coplanar horizontal portions equi-angularly spaced apart from each other, each extending circumferentially an angular distance between about 60° to 100° and more preferably between about 80° and 90° along the cap's interior surface; and the retention grooves 54 of thehousing base 28 comprises two coplanar horizontal portions equi-angularly spaced apart from each other, each extending circumferentially an angular distance greater than that of the robs, and thus between about 70° to 110° and more preferably between about 85° to 95°. - A solvent bond is preferably formed between the facing surfaces of the septum, cap and housing base. The advantages of the mechanical retention of the cap to the housing base include assured securement of the cap and the housing base, in addition to the bonding thereof. Another advantage is more efficiency in the manufacturing of the venous access port assembly, and resultant economy: since the septum flange is under compression upon and after assembly, and since bonding is performed to further secure and seal the cap to the housing base, the mechanical lock holds the cap appropriately to the housing base while simultaneously maintaining appropriate compression of the septum flange, thus eliminating the necessity of tooling fixtures that otherwise would be needed to hold the three parts together until the bonding material fully cures.
- Referring in particular to
FIGS. 8 to 10 , the present invention further includes providing a centering system operating to precisely center thehousing base 28 withininterior cavity 68 ofcap 36 when being fastened together during assembly. A plurality ofvertical crush ribs 72 are defined on one of the housing base and the cap at the interface therebetween. Preferably, thecrush ribs 72 are provided on the interior surface ofcap 36 at angularly spaced locations thereabout, and further, preferably, crushribs 72 are offset angularly from theretention ribs 70. During assembly of thehousing base 28 to thecap 36, the exterior surface of the housing base becomes engaged with the crush ribs, and may compress the very small dimensioned ribs. The crush ribs of the present invention take up any looseness, slack or incremental “play” between the housing base and the cap due to manufacturing tolerances, and further improve the solvent bond by assuring an evenly circumferentially distributed incremental gap at the interface between the housing base and the cap facilitating maximum wicking of the solvent to adjacent surfaces at the interface. - In the described embodiment, the
crush ribs 72 are each positioned at an angular distance a from the longitudinal port axis on either side, such as 35°, as seen inFIG. 10 . As seen inFIG. 11 , each crush rib may have a very small radius of about 0.005 in (0.127 mm). The solvent may be, for example, tetrahydrofuran, and beads thereof may be provided on selected surface portions of the cap and the housing base along the interface there between, including, for example, the outer periphery of top cap surface 46, the top of tab 58, the bottom portion of housingbase side wall 56, and, after assembly, along the bottom surface of the assembly at the small cap/base interface gap. - It will be appreciated by those skilled in the art that changes could be made to the embodiments described above without departing from the broad inventive concept thereof. It is understood, therefore, that this invention is not limited to the particular embodiments disclosed, but it is intended to cover modifications within the spirit and scope of the present invention as defined by the appended claims.
Claims (20)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/335,484 US20170043152A1 (en) | 2007-06-22 | 2016-10-27 | Low Profile Venous Access Port Assembly |
US17/541,865 US20220105332A1 (en) | 2006-10-18 | 2021-12-03 | Low Profile Venous Access Port Assembly |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US93684907P | 2007-06-22 | 2007-06-22 | |
US12/144,171 US9504815B2 (en) | 2007-06-22 | 2008-06-23 | Low profile venous access port assembly |
US15/335,484 US20170043152A1 (en) | 2007-06-22 | 2016-10-27 | Low Profile Venous Access Port Assembly |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US12/144,171 Continuation US9504815B2 (en) | 2006-10-18 | 2008-06-23 | Low profile venous access port assembly |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/725,287 Continuation US20070233017A1 (en) | 2006-10-18 | 2007-03-19 | Venous access port assembly with radiopaque indicia |
Publications (1)
Publication Number | Publication Date |
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US20170043152A1 true US20170043152A1 (en) | 2017-02-16 |
Family
ID=39730836
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US12/144,171 Active 2031-07-02 US9504815B2 (en) | 2006-10-18 | 2008-06-23 | Low profile venous access port assembly |
US15/335,484 Abandoned US20170043152A1 (en) | 2006-10-18 | 2016-10-27 | Low Profile Venous Access Port Assembly |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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US12/144,171 Active 2031-07-02 US9504815B2 (en) | 2006-10-18 | 2008-06-23 | Low profile venous access port assembly |
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US (2) | US9504815B2 (en) |
EP (1) | EP2167182B1 (en) |
JP (1) | JP2010530787A (en) |
CN (1) | CN101678199B (en) |
AU (1) | AU2008268547B2 (en) |
CA (2) | CA2946031C (en) |
MX (1) | MX2009013811A (en) |
WO (1) | WO2009002839A1 (en) |
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- 2008-06-20 MX MX2009013811A patent/MX2009013811A/en active IP Right Grant
- 2008-06-20 WO PCT/US2008/067657 patent/WO2009002839A1/en active Application Filing
- 2008-06-20 CN CN2008800211876A patent/CN101678199B/en active Active
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Also Published As
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CN101678199B (en) | 2013-10-30 |
MX2009013811A (en) | 2010-01-27 |
WO2009002839A1 (en) | 2008-12-31 |
US9504815B2 (en) | 2016-11-29 |
CA2946031C (en) | 2019-02-05 |
CA2688144C (en) | 2016-12-06 |
CN101678199A (en) | 2010-03-24 |
US20080319405A1 (en) | 2008-12-25 |
AU2008268547B2 (en) | 2013-05-23 |
EP2167182B1 (en) | 2013-01-23 |
JP2010530787A (en) | 2010-09-16 |
CA2946031A1 (en) | 2008-12-31 |
CA2688144A1 (en) | 2008-12-31 |
EP2167182A1 (en) | 2010-03-31 |
AU2008268547A1 (en) | 2008-12-31 |
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