Buffering agent delivery system for anesthetic syringe

Patent metadata

Field	Value
Publication number	US-8974407-B2
Application number	US-201414195148-A
Country	US
Kind code	B2
Filing date	Mar 3, 2014
Priority date	Apr 5, 2011
Publication date	Mar 10, 2015
Grant date	Mar 10, 2015

Abstract

A syringe for dispensing anesthetic from a cartridge having an interior wall defining a hollow interior sized and shaped for receiving a dose of anesthetic, and a piston. The syringe includes a tubular plunger slidably received in the hollow interior of the tubular cartridge. The plunger has a hollow interior extending between a distal end shaped for engaging the piston and an open proximal end. The syringe includes a plunger rod slidably received in the hollow interior of the tubular plunger. The rod has a sharp distal end adapted to penetrate the piston, a proximal end, and a length extending between the distal end and the proximal end sized so a delivery portion of the rod extends through the piston into the cartridge when the rod is driven through the piston. The delivery portion includes a recess for receiving a buffering agent to reduce acidity of the dose of anesthetic.

First claim

What is claimed is:

1. A syringe comprising:
a first chamber;
a second chamber separated from the first chamber;
a slideable piercable piston sealing a first end of the first chamber;
a syringe plunger movable within the syringe from a first position spaced away from the slideable piercable piston to a second position extending through the piercable piston to deliver contents of the second chamber to the first chamber; and
wherein the second chamber is formed in the slidea…

Assignees

• Covidien Lp

Inventors

• Finke Melvin

Classifications

• A61M5/2466

  Human Necessities · mapped topic

• A61M5/31596 Primary

  Human Necessities · mapped topic

• A61M2005/31598

  Human Necessities · mapped topic

• A61M5/24

  Human Necessities · mapped topic

• A61M2005/2407

  Human Necessities · mapped topic