# US 8,771,254 B2 · Method of using a syringe

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- Number: US 8,771,254 B2
- Document ID: US8771254B2
- Status: Granted
- Kind: B2
- Application number: 13/180,769
- Filed: 2011-07-12
- Published: 2011-12-08
- Granted: 2014-07-08
- Earliest claimed: 2006-11-13
- Assignees: Medical Components, Inc.
- Applicants: Federico Nalesso; Mark S. Fisher; W. Shaun Wall
- Inventors: Federico Nalesso; Mark S. Fisher; W. Shaun Wall
- Web page: https://patentgrep.com/patent/US8771254B2

## CPC

- A61M 39/20: Closure caps or plugs for connectors or open ends of tubes
- A61M 5/19: having more than one chamber
- A61M 5/284: {comprising means for injection of two or more media, e.g. by mixing}
- A61M 5/31596: {comprising means for injection of two or more media, e.g. by mixing}
- A61M 39/221: {Frangible or pierceable closures within tubing (A61M39/14 takes precedence; frangible closures for containers A61J1/14)}
- A61M 5/286: {upon internal pressure increase, e.g. pierced or burst (A61M5/283 takes precedence)}
- A61M 5/31501: {Means for blocking or restricting the movement of the rod or piston (A61M5/5013 takes precedence)}
- A61M 5/31551: {including axial movement of dose setting member}
- A61M 5/3158: {the component being manually operated or triggered by an axially moving actuator operated by user, e.g. an axially movable injection button}
- A61M 5/31591: {Single dose, i.e. individually set dose administered only once from the same medicament reservoir, e.g. including single stroke limiting means}
- A61M 2005/1787: {Syringes for sequential delivery of fluids, e.g. first medicament and then flushing liquid}
- A61M 2005/3123: {having air entrapping or venting means, e.g. purging channels in pistons}
- A61M 2039/1077: {Adapters, e.g. couplings adapting a connector to one or several other connectors}
- A61M 2205/195: by the needle tip shape
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## Abstract

A device (10,110,210) for the expression of liquids, such as for the maintenance treatment of vascular catheters. A syringe (16; 116a,116b; 216) has a support structure (15,215) and includes at least two separate compartments (11,12; 111,112; 211,212) in which liquids for treating the lumen (L,283) of a catheter (C,280) with which the device is associated. The syringe further includes a closure plug (13,213) to be associated with the lumen being treated, which is coupled, by virtue of a releasable securement arrangement, to support structure (15,215). At least one plunger (16; 116a,116b; 216) is also included for infusing, in preset order, the different treatment liquids into the lumen to be treated, and the syringe further includes a duct (17,217) which is in fluid communication with the two compartments and is arranged through a through hole through the closure plug (13,213) in order to allow access of the treatment liquid to the interior of the lumen (L,283) upon activation of the plunger.

## Claims

### Claim 1

A method for providing maintenance treatment to a catheter utilizing a syringe device having:
a support structure having at least two separate compartments for containing respective liquids;
a distal wall traversing the support structure proximate a distal end thereof;
a duct extending through the distal wall enabling liquid to exit the at least two compartments;
at least one plunger movably affixed to the support structure proximate the proximal end thereof for infusing liquids from the device through the duct upon activation of the at least one plunger, and
a closure plug removably attached to the support structure at a distal end thereof,
the support structure, the at least two compartments and the at least one plunger being adapted to infuse the respective liquids sequentially in a preselected order into the catheter lumen; the method comprising the steps of:
connecting to the distal end of the syringe device, with the closure plug already attached to the support structure, to a proximal end of a catheter such that the closure plug is connected to the catheter proximal end and the duct is in fluid communication with a lumen of the catheter,
activating the at least one plunger to express a first liquid from a first compartment, through the duct and into the lumen;
activating one of said at least one plunger or another plunger associated with the second compartment, to express a second liquid from a second compartment through the duct and into the lumen; and
removing the syringe device from the catheter proximal end such that the closure plug is detached from the support structure while remaining connected to the catheter proximal end.

### Claim 2

A method for providing maintenance treatment to a catheter having a catheter lumen, comprising the steps of:
providing a syringe having:
a support structure having at least one compartment for containing liquid and having a distal wall traversing the support structure proximate a distal end thereof;
a duct extending distally through the distal wall enabling liquid to exit the at least one compartment, such that the duct distal end is recessed within the syringe distal end; and
a plunger movably affixed to the support structure proximate the proximal end thereof in operative association with the at least one compartment for expressing liquid from the syringe through the duct upon activation of the at least one plunger,
providing a catheter having a luer fitting affixed to a proximal end thereof, the luer fitting defining an open passageway therethrough extending to a catheter lumen such that the proximal end of the catheter is open; then, in sequence
rotatably coupling the distal end of the syringe to the luer fitting such that the duct extends into the open passageway and thus is in fluid communication with the lumen;
activating the plunger to express a liquid from the at least one compartment, through the duct and into the lumen; and
removing the distal end of the syringe from the luer fitting affixed to the catheter proximal end;
wherein the step of providing the syringe comprises providing a syringe that includes a closure plug affixed to the support structure distally of the distal wall by easily detachable connections, the closure plug being mostly recessed within the syringe distal end with the duct extending distally through a transverse sealing member of the closure plug, and
wherein the step of threadedly coupling the distal end of the syringe to the luer fitting comprises, while the closure plug is affixed to the support structure, threadedly coupling the closure plug to the luer connector affixed to the catheter proximal end while simultaneously coupling the syringe to the catheter proximal end whereafter the duct is in fluid communication with the catheter lumen.

### Claim 3 (depends on 2)

The method of claim 2, wherein the step of removing the syringe from the luer fitting comprises manipulating the syringe with respect to the luer fitting thereby detaching the connections as the closure plug remains coupled to the luer fitting.