Title:
METHODS OF CALIBRATING A SENSOR IN A PATIENT MONITORING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2009/104016
Kind Code:
A3
Abstract:
A method comprises calculating a sensor drift; calibrating the sensor using at least one calibration fluid; and periodically updating the sensor calibration based on the sensor drift calculation. Additionally, a method comprises providing a calibration fluid; setting the analyte concentration in the first fluid to a first concentration with said adjusting means; measuring the first analyte concentration with the sensor; setting the analyte concentration in the first fluid to a second concentration with said adjusting means; measuring the second analyte concentration with the sensor; and determining the calibration coefficients for the sensor from the measured first analyte concentration and the measured second analyte concentration. Additionally, a method comprises exposing the sensor to a first fluid comprising a first unknown concentration of the analyte; measuring the first unknown analyte concentration with the sensor; determining the first unknown analyte concentration with an analyser external to the patient monitoring system; providing the sensor with the determined first analyte concentration, and determining the calibration coefficients for the sensor from the measured first unknown analyte concentration and the analyte concentration determined by the analyser.
Inventors:
TROUGHTON GAVIN (GB)
LAITENBERGER PETER (GB)
LAITENBERGER PETER (GB)
Application Number:
PCT/GB2009/050161
Publication Date:
March 31, 2011
Filing Date:
February 19, 2009
Export Citation:
Assignee:
SPHERE MEDICAL LTD (GB)
TROUGHTON GAVIN (GB)
LAITENBERGER PETER (GB)
TROUGHTON GAVIN (GB)
LAITENBERGER PETER (GB)
International Classes:
A61B5/00
Domestic Patent References:
| WO2006085087A2 | 2006-08-17 | |||
| WO2005041766A1 | 2005-05-12 |
Foreign References:
| US20020019707A1 | 2002-02-14 | |||
| US20060155486A1 | 2006-07-13 | |||
| US20070299617A1 | 2007-12-27 |
Attorney, Agent or Firm:
ELKINGTON AND FIFE LLP (8 Pembroke RoadSevenoaks, Kent TN13 1XR, GB)
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