Device for mixing anesthetic vapor with anesthetic gas

US7481215B2 · kind B2 · utility

Assignee

• Dräger Medical AG & Co. KG · DE

Inventors

• Thomas Rossen · Lübeck, DE
• Karl-Ludwig Gippert · Lübeck, DE
• Michael Heidschmidt · Wulfen, DE
• Jurgen Muller · Wulfen, DE
• Rainer Kunz · Wulfen, DE

Key dates

• Filing date: Jul 27, 2005
• Grant date: Jan 27, 2009
• Expiry date: Feb 4, 2027

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2205/70
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An anesthetic evaporator with a pressure control circuit has a differential pressure pick-up (18) can be calibrated in a simple manner. A switchover device (20) is provided according to the present invention at a bypass gap (3), which is designed to connect the gas inlet (4) directly with the gas outlet (5) via a first bypass line (23) and to bridge over the bypass gap (3) via a second bypass line (26) connected to a ventilation duct (27) in a first switching position. The gas flow from the gas inlet (4) to the gas outlet (5) is established via the bypass line (2) in a second switching position. The calibration of the differential pressure pick-up (18) with the pneumatic connections (16, 17) is performed in the first switching position of the switchover means (20) via the ventilation duct (27), which is open toward the ambient atmosphere.