METHOD FOR FILLING A SYRINGE

• US 3,578,037 A
• Filed: 09/11/1969
• Issued: 05/11/1971
• Est. Priority Date: 09/11/1969
• Status: Expired due to Term

• Current Assignee: Thomas J. Flynn
• Original Assignee: Thomas J. Flynn
• Inventors: Flynn, Thomas J.
• Application Number:
  US04/857,089
• Time in Patent Office: 607 Days
• US Class Current: 141/2
• CPC Class Codes: A61J 1/201 having one piercing end
• CPC Class Codes: A61J 1/2086 for fluid filtration
• CPC Class Codes: A61J 1/2096 Combination of a vial and a syringe for transferring or mixing their contents

Abstract

An apparatus and method for preventing foreign material from entering syringes during the filling of the syringes from containers and thus preventing foreign material from being injected into a patient. The apparatus provides a liquid container, such as a vial, having a pierceable self-sealing stopper for inserting the syringe needle for filling the syringe. A filter material is attached to the top of the container so that the needle can be extended therethrough and adapted to filter out foreign material such as coring that breaks loose as the needle pierces the top of the container. A method is provided including drawing air into a syringe prior to inserting the syringe cannula through a pierceable self-sealing stopper of a container. The air in the syringe is then injected into the container freeing any coring material that has broken from the container stopper either into the filtering material or into the liquid in the container. The cannula tip is then withdrawn or extended to place the tip either in the liquid or the filter material where the coring material has not been deposited and drawing the required amount of liquid from the container into the syringe.

Claims

1. A method for filling a syringe from a container of liquid comprising in combination the steps of:

a. drawing gas into said syringe;

b. inserting the needle of said syringe through a pierceable self-sealing stopper located in an opening to said container;

c. injecting gas in said syringe into said container thereby expelling any foreign material from said needle in one area of said container;

d. locating the tip of said needle in a second area of said container separated from said one area by a filtering material; and

e. drawing liquid from said containEr into said syringe.

2. The method according to claim 1 in which said locating said needle tip in one area includes locating said needle tip within a filter material.

3. The method according to claim 1 in which said locating said needle tip in one area includes locating said needle tip to one side of a filter material.

4. The method according to claim 1 in which said gas drawn into said syringe is air having a volume in approximately the same volume of liquid that is to be drawn from said container into said syringe.