Low Profile Venous Access Port Assembly

• US 20080319405A1
• Filed: 06/23/2008
• Published: 12/25/2008
• Est. Priority Date: 06/22/2007
• Status: Active Grant

• Current Assignee: Medical Components, Inc.
• Original Assignee: Medical Components, Inc.
• Inventors: Bizup, Raymond
• Granted Patent: US 9,504,815 B2
• Time in Patent Office: Days
• US Class Current: 604/288.02
• CPC Class Codes: A61M 2039/0063 Means for alignment of the septum, e.g. septum rim with alignment holes
• CPC Class Codes: A61M 2039/0072 Means for increasing tightness of the septum, e.g. compression rings, special materials, special constructions
• CPC Class Codes: A61M 2039/0223 having means for anchoring the subcutaneous access site
• CPC Class Codes: A61M 2039/0229 having means for facilitating assembling, e.g. snap-fit housing or modular design
• CPC Class Codes: A61M 2039/027 having a particular valve, seal or septum
• CPC Class Codes: A61M 2039/1072 with a septum present in the connector
• CPC Class Codes: A61M 39/02 Access sites
• CPC Class Codes: A61M 39/0208 Subcutaneous access sites for injecting or removing fluids transcutaneous access sites A61M39/0247; implantable infusion devices A61M5/14276

Abstract

A venous access port assembly (10) having a housing base (28) with a discharge stem (16), a septum (14) and a cap (36). An interior reservoir (22) is defined by a well (30) in the housing base and the bottom surface of the septum, and a passageway (20) extends from the reservoir through the discharge stem (16). The cap (36) is secured to the housing base (28) and securely retains the septum in the assembly (10), compressing an annular flange (44) of the septum against a septum seat (46) of the housing base. Horizontal ribs on the interior of the cap snap into complementary grooves on the side wall of the housing base to mechanically lock together the cap and housing base during curing of the solvent bonding agent. The cap (48) is mechanically secured to the housing base (28) as well as being bonded thereto. Crush ribs (72) on the interior surface (68) of the cap (36), precisely center the cap about the housing base during assembly and compensating for manufacturing tolerances.

Claims

1. A venous access port assembly, comprising:

a housing having a discharge port, a needle-penetrable septum and a cap securable to the housing and retaining the septum securely in the assembly,

wherein an upper surface of a housing base of the housing includes a septum seat onto which a seating flange of the septum is seated, and

wherein the housing base includes a first retention section extending circumferentially around much of the exterior surface of the side wall, and the cap includes an interior cavity having an inwardly facing surface associated with and adjacent to the housing base side wall and a second retention section is defined circumferentially around much of the inwardly facing surface and is associated with the first retention section and complementary thereto such that upon assembly of the cap to the housing base the first and second retention sections snap fit together to assure mechanical joining of the cap to the housing base thereby securing the septum in the housing, and

wherein one of the housing base and the cap further includes a plurality of angularly spaced vertical crush ribs on a surface thereof to be engaged by a surface of the other for precisely centering the housing base and the cap during assembly.

2. The venous access port assembly of claim 1, wherein adjacent surfaces of the cap and the housing base are solvent bonded to each other upon assembly.

3. The venous access port assembly of claim 1, wherein one of the first and second retention sections is a retention rib and the other thereof is a complementary retention groove.

4. The venous access port assembly of claim 3, wherein the retention groove is defined on the outer surface of the housing base and the retention rib is defined on the inwardly facing surface of the interior cavity of the cap.

5. The venous access port assembly of claim 3, wherein the retention rib comprises two separate coplanar portions spaced apart from each other, each extending circumferentially an angular distance between about 60°

to about 100°

, and the retention groove comprises two separate coplanar portions spaced apart from each other, each extending circumferentially an angular distance about 70°

to about 110° and

extending an angular distance greater than that of the complementary retention rib portion.

6. The venous access port assembly of claim 5, wherein the retention rib comprises two separate coplanar portions spaced apart from each other, each extending circumferentially an angular distance between about 80°

to about 90°

, and the retention groove comprises two separate coplanar portions spaced apart from each other, each extending circumferentially an angular distance about 85°

to about 95° and

extending an angular distance greater than that of the complementary retention rib portion.

7. The venous access port assembly of claim 5, wherein the crush ribs are angularly spaced offset from the retention rib portions and from a longitudinal axis through the port at least at the discharge port.

8. The venous access port assembly of claim 7, wherein the crush ribs are located about 35°

from either side of the longitudinal port axis.

9. The venous access port assembly of claim 7, wherein the crush ribs have a radius of about 0.005 inches.