Systems, devices, methods for delivering hydrogel compositions with self-purging to prevent clogging

• US 9,662,098 B2
• Filed: 02/03/2014
• Issued: 05/30/2017
• Est. Priority Date: 04/05/2010
• Status: Active Grant

• Current Assignee: Neomend, Inc. (Becton, Dickinson & Co)
• Original Assignee: Neomend, Inc. (Becton, Dickinson & Co)
• Inventors: Barker, Jr., Peter, Mezger, William Jerome
• Primary Examiner(s): GILBERT, ANDREW M
• Application Number:
  US14/170,759
• Publication Number:
  US 20140148791A1
• Time in Patent Office: 1,212 Days
• Field of Search: 604 82- 85, 604 89, 604141, 604 57, 604500, 604514, 604518, 604246, 604266, 604269
• CPC Class Codes: A61B 17/00491 Surgical glue applicators surgical adhesives A61L24/00; two-component delivery syringes A61M5/19
• CPC Class Codes: A61B 17/12186 liquid materials adapted to be injected
• CPC Class Codes: A61B 2017/00495 for two-component glue
• CPC Class Codes: A61B 2017/00942 hydrophilic
• CPC Class Codes: A61M 35/003 Portable hand-held applicators having means for dispensing or spreading integral media hand-held massage devices with liquid delivery A61H7/003
• CPC Class Codes: A61M 5/003 Kits for diabetics

Abstract

A hydrogel composition is formed by conveying separate first and second liquid components subject to a selectively applied application pressure P(A) into an outlet path for mixing and discharge. A liquid flushing agent is automatically conveyed into the outlet path subject to a substantially constantly applied purge pressure P(P) when the application of P(A) is interrupted, to continuously flush residual hydrogel composition from the outlet path.

Claims

1. A self-purging delivery apparatus for a multi-component composition, the delivery apparatus comprising:

an applicator comprising two or more interior channels each for separately conveying one of the components and an outlet path which is fluidly connected to each of the interior channels to facilitate mixing of the components therein;

a multi-barrel syringe, wherein each barrel defines a reservoir, and each barrel is coupled at one end to one of the two or more interior channels of the applicator;

a single actuator coupled to each barrel such that application of an application pressure P(A) causes each component to flow simultaneously from each reservoir, respectively, to the interior channels and the outlet path;

a purge assembly comprising a source of liquid flushing agent, under a constant pressure P(P), fluidly coupled to the applicator'"'"'s outlet path via a purge path to convey liquid flushing agent into the applicator; and

one or more pressure-sensitive valve assemblies operatively coupled to selectively close the purge path when the application pressure P(A) applied via the actuator is greater than the constant pressure P(P) of the source of the liquid flushing agent.

2. The apparatus of claim 1, wherein the purge path is coupled to the outlet path at a location where comingling of the components occurs.