# US 12,109,396 B2 · Dual-chamber syringe with dual-lumen intravenous set

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,109,396 B2
- Document ID: US12109396B2
- Status: Granted
- Kind: B2
- Application number: 17/845,392
- Filed: 2022-06-21
- Published: 2022-10-13
- Granted: 2024-10-08
- Earliest claimed: 2018-10-11
- Assignees: CareFusion 303, Inc.
- Applicants: CareFusion 303, Inc.
- Inventors: George Mansour; Eugene Mason; Ryan Callahan; Todd Oda; Wesley Underwood; Adel Shams; Dylan Beyhl; Seyed Salehi Borojerdi
- Web page: https://patentgrep.com/patent/US12109396B2

## CPC

- A61M 5/19: having more than one chamber
- A61M 5/2066: {comprising means for injection of two or more media, e.g. by mixing}
- A61M 5/2448: {comprising means for injection of two or more media, e.g. by mixing}
- A61M 5/284: {comprising means for injection of two or more media, e.g. by mixing}
- A61M 39/105: {Multi-channel connectors or couplings, e.g. for connecting multi-lumen tubes (multi-channel connectors in general F16L37/56)}
- A61M 2005/1787: {Syringes for sequential delivery of fluids, e.g. first medicament and then flushing liquid}
- A61M 2005/3132: {having flow passages for injection agents at the distal end of the barrel to bypass a sealing stopper after its displacement to this end due to internal pressure increase}
- A61M 2039/082: {Multi-lumen tubes}
- A61M 2039/242: {designed to open when a predetermined pressure or flow rate has been reached, e.g. check valve actuated by fluid}
- 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 dual-chamber syringe may include an end wall and a primary plunger. The primary plunger may include a primary stopper. The primary stopper may form a primary chamber with the end wall. A secondary plunger may be in mechanical association with the primary plunger. The secondary plunger may include a secondary stopper. The secondary stopper may form a secondary chamber with the primary stopper. A primary nozzle may extend from the end wall and may be in fluid communication with the primary chamber. A secondary nozzle may extend from the end wall and may be in fluid communication with the secondary chamber.

## Claims

### Claim 1

A dual-chamber syringe, comprising:
an end wall comprising a channel;
a primary plunger comprising a primary stopper, the primary stopper forming a primary chamber with the end wall;
a secondary plunger in mechanical association with the primary plunger, the secondary plunger comprising a secondary stopper, the secondary stopper forming a secondary chamber with the primary stopper;
a primary nozzle extending from the end wall, the primary nozzle in fluid communication with the primary chamber;
a secondary nozzle extending from the end wall, the secondary nozzle in fluid communication with the secondary chamber; and
an O-ring configured to isolate the primary nozzle from the secondary chamber in a pre-flushing state and to permit fluid communication between the secondary chamber and the primary nozzle via the channel in a post-flushing state.

### Claim 2 (depends on 1)

The dual-chamber syringe of claim 1, wherein the secondary nozzle extends centrally from the end wall.

### Claim 3 (depends on 2)

The dual-chamber syringe of claim 2, wherein the primary nozzle is radially offset from the secondary nozzle.

### Claim 4 (depends on 1)

The dual-chamber syringe of claim 1, wherein the primary nozzle and the secondary nozzle are asymmetric.

### Claim 5 (depends on 1)

The dual-chamber syringe of claim 1, further comprising a nozzle guide extending from the end wall and surrounding the primary nozzle and the secondary nozzle.

### Claim 6 (depends on 1)

The dual-chamber syringe of claim 1, wherein the primary plunger is lockable to the secondary plunger.

### Claim 7 (depends on 1)

The dual-chamber syringe of claim 1, wherein the secondary nozzle is in fluid communication with the secondary chamber via an internal tube extending from the end wall.

### Claim 8 (depends on 7)

The dual-chamber syringe of claim 7, wherein the internal tube is received by a primary inner cavity of the primary plunger.

### Claim 9 (depends on 1)

The dual-chamber syringe of claim 1, wherein the O-ring seals against a notch of the end wall in the pre-flushing state, wherein the notch is in fluid communication with the channel of the end wall.

### Claim 10 (depends on 9)

The dual-chamber syringe of claim 9, wherein the O-ring permits fluid communication between the secondary chamber and the primary nozzle via the notch and the channel in the post-flushing state.

### Claim 11 (depends on 1)

The dual-chamber syringe of claim 1, wherein fluid is forced past the O-ring to permit fluid communication between the secondary chamber and the primary nozzle in the post-flushing state.