Pinch valve mechanism for a medical fluid injection device

US7922700B2 · kind B2 · utility

Assignee

• ACIST MEDICAL SYSTEMS INC. · US

Inventors

• Alan Evans · Otsego, US
• Marty Hieb · St. Louis Park, US
• Khoi Le · Edina, US
• Chris Lins · Crystal, US
• Steven Plager · Burnsville, US
• Bill West · Eden Prairie, US
• Darryl T. Wrolson · Waconia, US

Key dates

• Filing date: Oct 30, 2008
• Grant date: Apr 12, 2011
• Expiry date: Oct 30, 2028

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2205/6045
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

In general, this disclosure relates to techniques for sealing, or pinching, high-pressure fluid tubing (e.g., braided tubing) that may be used to deliver medical fluid from a powered medical fluid injection device, such as an injector that delivers contrast media and/or saline during angiographic or computed tomography (CT) procedures. In some cases, one or more low-friction, solenoid-based pinch valve mechanisms may be used. One example powered medical fluid injection device comprises an injector head and at least one pinch valve mechanism that is coupled to the injector head. The at least one pinch valve mechanism comprises a plunger, a reciprocating arm driven by the plunger, and a tube pinching area. The at least one pinch valve mechanism, when deactivated by the injector head, is configured to cause the reciprocating arm to pinch fluid tubing that runs through the tube pinching area.