08808247 cites 95 patents.

A needle assembly including a positive flush mechanism for use with a vascular access port. The needle assembly is configured to supply fluid to the port and to provide a positive flush to overcome negative pressures in the port that can potentially occur during withdrawal of the needle from the port.

Title
Safety needle with positive flush
Application Number
13/935399
Publication Number
8808247 (B2)
Application Date
July 3, 2013
Publication Date
August 19, 2014
Inventor
Eddie K Burnside
Bountiful
UT, US
Kevin W Sheetz
Sandy
UT, US
Daniel J Triplett
Providence
UT, US
Agent
Rutan & Tucker
Assignee
C R Bard
NJ, US
IPC
A61M 5/178
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