# US 12,472,311 B2 · System and method for syringe fluid fill verification and image recognition of power injector system features

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

- Number: US 12,472,311 B2
- Document ID: US12472311B2
- Status: Granted
- Kind: B2
- Application number: 18/328,564
- Filed: 2023-06-02
- Published: 2023-10-05
- Granted: 2025-11-18
- Earliest claimed: 2015-08-28
- Assignees: Bayer HealthCare LLC
- Applicants: Bayer Healthcare LLC
- Inventors: Kevin Cowan; Michael Spohn; Michael McDermott
- Web page: https://patentgrep.com/patent/US12472311B2

## CPC

- A61M 5/365: {Air detectors (A61M5/1684 takes precedence; in extracorporeal blood circuits A61M1/3626)}
- A61M 5/007: {for contrast media}
- A61M 5/14546: {Front-loading type injectors}
- A61M 5/1456: {with a replaceable reservoir comprising a piston rod to be moved into the reservoir, e.g. the piston rod is part of the removable reservoir}
- A61M 5/315: Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod {or piston}; Appliances on the rod for facilitating dosing {; Dosing mechanisms}
- G01F 23/02: by gauge glasses or other apparatus involving a window or transparent tube for directly observing the level to be measured or the level of a liquid column in free communication with the main body of the liquid
- A61M 5/3134: {characterised by constructional features of the distal end, i.e. end closest to the tip of the needle cannula}
- A61M 5/31511: {Piston or piston-rod constructions, e.g. connection of piston with piston-rod (A61M5/5066 takes precedence)}
- A61M 5/445: {the media being heated in the reservoir, e.g. warming bloodbags}
- A61M 2205/3306: Optical measuring means
- A61M 2205/3313: used specific wavelengths
- A61M 2205/3317: Electromagnetic, inductive or dielectric measuring means
- A61M 2205/3331: Pressure; Flow
- A61M 2205/3362: with minimised length of fluid lines; Taking into account the elastic expansion of fluid lines to increase accuracy
- A61M 2205/3368: Temperature
- A61M 2205/505: Touch-screens; Virtual keyboard or keypads; Virtual buttons; Soft keys; Mouse touches
- A61M 2205/587: Lighting arrangements
- A61M 2205/6018: providing set-up signals for the apparatus configuration
- A61M 2205/6063: Optical identification systems
- A61M 2205/6072: Bar codes
- A61M 2205/6081: Colour codes
- 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)}
- G01F: MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME

## Abstract

A fluid injection system and a fluid verification system for confirming that a syringe, containing a fluid for injection, is fully filled with fluid and neither has free space (i.e., air) near the distal end thereof when the syringe is provided in an upright position nor contains air bubbles. Imaging processing techniques and systems are also provided to determine various injection parameters and to verify the type and certain properties of fluid that is present within a syringe.

## Claims

### Claim 1

A fluid injection system comprising:
a fluid injector;
a syringe operatively engaged with the fluid injector;
an image capture device positioned to capture an image of at least a portion of a barrel of the syringe; and
at least one computing device in communication with the fluid injector and the image capture device, the at least one computing device comprising at least one processor configured to:
obtain the image of at least the portion of the barrel of the syringe;
determine, based on the image of at least the portion of the barrel of the syringe, an outside diameter of the syringe along a length of the barrel of the syringe;
determine, based on the outside diameter of the syringe along the length of the barrel of the syringe, at least one characteristic of an injection procedure performed by the fluid injector; and
adjust the at least one characteristic of the injection procedure performed by the fluid injector to ensure that fluid is delivered to a predetermined region of interest in a body of a patient at a particular time such that viable images are produced during an imaging procedure.

### Claim 2 (depends on 1)

The fluid injection system of claim 1, wherein the at least one characteristic of the injection procedure is at least one of flow rate, volume of fluid remaining within the syringe, and capacitance of the syringe.