| Originator: |  | MHRA Medical Device Alerts 
 
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			Care TrustsMental Health TrustsSpecialists TrustsNHS Regional OfficesLearning Disabilities TrustsMental Health & Social Care TrustsAmbulance TrustsMental Health & Learning Disabilities TrustsAcute TrustsCommunity Trusts 
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			Other contactsIndependent Healthcare Providers (registered with CAS)Clinical Commissioning GroupsSpecial Health Authorities 
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		| Title: |  | cobas b 221 instruments with AutoQC module - software limitation affecting automatic QC measurements 
 
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		| Broadcast content: |  | Manufactured by Roche Diagnostics GmbH – Under specific circumstances scheduled automatic QC measurements may no longer be performed and erroneous patient results may remain undetected. 
 
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		| Additional information: |  | Do not cascade to Primary Care 
 
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		| Action underway deadline: |  | 16-May-2018 
 
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		| Action complete deadline: |  | 01-Jun-2018 
 
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