04834720 is referenced by 229 patents and cites 3 patents.

A septum is provided for use with implantable ports used for repeated drug delivery infusions. The septum allows for a substantially higher (more than twice) number of punctures prior to leakage and failure. This is achieved by the use of two different Shore A durometer hardnesses for different sections of the septum, one of harder material than used in prior art septums for the main body of the septum, and a section of much softer Shore A duromater hardness adjacent the inner surface of the septum for greater sealing facility when a needle is withdrawn. In addition, the greater hardness of the main body allows for greater stability of the needle when in place in the septum.

Title
Implantable port septum
Application Number
7/137645
Publication Number
4834720
Application Date
December 24, 1987
Publication Date
May 30, 1989
Inventor
Francis E Blinkhorn
Vernon
NJ, US
Agent
Robert P Grindle
Assignee
Becton Dickinson and Company
NJ, US
IPC
A61M 5/00
View Original Source