Anesthetic filter arrangement with variable retention of gas by the filter

US6745771B2 · kind B2 · utility

Assignee

• Siemens Elema AB · SE

Inventors

• Rolf Castor · Stuvsta-Snättringe, SE
• Petter Videbrink · Upplands Väsby, SE

Key dates

• Filing date: Dec 10, 2001
• Grant date: Jun 8, 2004
• Expiry date: Jan 26, 2022

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2016/1035
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An anesthetic filter arrangement has a filter housing with openings disposed to delimit a gas flow path inside the housing for gas passing to and from a patient, and having disposed within the gas flow path a filter element formed of an adsorption material for the alternate adsorption and desorption of gaseous anesthetic from and into gas passing along the gas flow path respectively from and to the patient. An energy source is provided to supply thermal and/or vibrational energy at the filter element to vary retention of the gaseous anesthetic by the filter element.