Front loading medical injector and syringe for use therewith

• US 20020177811A1
• Filed: 06/10/2002
• Published: 11/28/2002
• Est. Priority Date: 08/17/1992
• Status: Active Grant

• Current Assignee: Medrad Incorporated (Bayer AG)
• Original Assignee: Medrad Incorporated (Bayer AG)
• Inventors: Reilly, David M., Gelblum, Eugene A., Havrilla, Joseph B., Kazousky, Daniel
• Granted Patent: US 6,808,513 B2
• Time in Patent Office: Days
• US Class Current: 604/152
• CPC Class Codes: A61M 2005/14553 comprising a pressure jacket
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 2205/582 by tactile feedback
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 5/14546 Front-loading type injectors
• CPC Class Codes: A61M 5/14566 with a replaceable reservoir for receiving a piston rod of the pump
• CPC Class Codes: Y10S 128/01 Motorized syringe

Abstract

A front-loading syringe which comprises a movable plunger for injecting liquid contrast media, is rotatably mountable on a front wall of an injector housing with an interference fit and in sealed relationship with respect thereto, with or without a pressure jacket, by a first-quick release mechanism. At the same time, the plunger is connected to an injector drive mechanism by a second readily releasable mechanism. During the mounting operation, a sensor reads injection information from an indicator device on the syringe and feeds it to an injector control. An audible-and-tactile indicating mechanism also is activated when the syringe is essentially in the desired mounted position. The syringe may include reinforcing ribs, which also function as volumetric gradations, and liquid media presence-or-absence indicating dots, which appear circular against a liquid media background and oval-shaped against an air background. An injection end of the syringe comprises an injector portion of reduced diameter inside a screw-threaded attachment portion of larger diameter, and may include loop-shaped reinforcing handle portions.

Claims

1. A syringe use with an injector having a drive member, the syringe comprising:

a body comprising a cylindrical main section, a conical section in fluid communication with the cylindrical main section and a fluid discharge section in fluid communication with the conical section;

a plunger movably disposed in the body, the plunger comprising one or more hook members extending rearward from the plunger for connecting the plunger to the drive member of the injector; and

at least one handle portion for facilitating handling of the syringe, the at least one handle portion operably associated with and extending forwardly from the conical section of the body.

2. The syringe of claim 1 wherein the at least one handle portion is integrally formed with the conical section.

3. The syringe of claim 1 wherein the at least one handle portion comprises two handle portions.

4. The syringe of claim 1 wherein the at least one handle portion is loop-shaped.

5. The syringe of claim 1 wherein the one or more hook members comprises two hook members.

6. The syringe of claim 1 wherein the at least one handle portion extends forwardly along the fluid discharge section.

7. The syringe of claim 1, further comprising at least one retaining flange associated with the cylindrical main section.