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Are you using Cobas B 221 blood gas analysers in your area – please refer to points two and three

July 18, 2023

The following measures must be carried out until the upgrade to software version 08.05 or higher is performed to ensure the optimal condition of the system and validity of results generated:

  1. Monitoring of the on-board stability of the sensor.

Please monitor the in-use time of the MSS cassette manually and ensure it is not used past the specified in-use time – (point of Care Team only – ext. 5352).

  1. Measures for measured Calcium values above 2.5 mmol/L and Chloride values below 70 mmol/L and above 150 mmol/L.

Please ensure are confirmed with a central laboratory measurement:

  • Calcium measurements above 2.5 mmol/L and
  • Chloride values below 70 mmol/L or
  • Chloride values above 150 mmol/L  (Non-physiologically low Calcium values (e.g.during citrate hemofiltration) should not be used for therapeutic decisions).
  1. Measures for the “Mixed Venous Blood” sample type.

The following parameters are no longer supported in software versions 08.04 and below and must not be used: “Mixed venous” blood type:

  • Shunt
  • avDO2
  • OER
  • Qt.

Should you have any questions in relation to this notice, please do not hesitate to contact Roche Technical services team: 0808 100 19 20, option 2