Method for calibration of gas measuring sensors for dissolved gasses and method for measuring the concentration of CO.sub.2 in blood with the assistance of such a calibration method

US5763760A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Walter Gumbrecht · Herzogenaurach, DE
• Manfred Stanzel · Erlangen, DE

Key dates

• Filing date: Feb 13, 1997
• Grant date: Jun 9, 1998
• Expiry date: Feb 13, 2017

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N33/4925
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Method for calibrating gas measuring sensors for dissolved gasses and method for measuring the concentration of CO.sub.2 in blood with the assistance of such a calibration method two or more separate calibration fluids in which a gas to be measured is dissolved with respectively different partial pressures are employed. For simplification, another (i.e., a second) calibration fluid is produced from one (i.e., a first) calibration fluid by modifying the partial pressure of the first calibration fluid to a different value, preferably by material transport between the first fluid and a gas phase. Analysis equipment operating with this method, particularly for CO.sub.2 measurement of blood, become simpler, smaller and less expensive.