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ISO 15189 & UKAS Validation Support

Practical validation, verification and implementation support for clinical laboratories working towards ISO 15189 accreditation or maintaining an existing scope.

Get your laboratory validation ready for UKAS assessment.

Get help from a UKAS trained consultant

Is your laboratory facing any of these challenges?

“We're not sure whether this requires verification or validation.”

A new examination method does not always require the same level of evaluation.

The appropriate approach depends on factors such as the method, manufacturer's claims, intended use, modifications and how the examination will be performed within your laboratory.


We can help you determine the appropriate approach and develop a proportionate study plan.

“We've completed the validation, but we're not confident the evidence is sufficient.”

We can review:

  1. Study design
  2. Acceptance criteria
  3. Sample selection
  4. Performance data
  5. Statistical analysis
  6. Conclusions
  7. Supporting documentation

Our aim is to identify gaps before they are identified during assessment.

“We're introducing a new analyser or examination method.”

Implementation of a new platform or method requires more than simply demonstrating that the analyser works.

Your laboratory needs evidence that the examination procedure is suitable for its intended clinical application within your own environment.


ISOCHECKS can support method verification, comparison studies, performance evaluation and implementation documentation. 

“We've modified the manufacturer's method.”

Changes to an established method can alter its performance characteristics.

Examples include:

Different specimen types

Modified sample preparation

Different extraction procedures

Changes to analytical parameters

Different instrumentation

Use outside the manufacturer's intended purpose


We can help assess the impact of the modification and determine an appropriate validation strategy.

UKAS Evidence Requirements Mapped to ISO 15189

ISO 15189:2022 Clause 7.3.2 - Validation and Verification of Examination Procedures

ISO 15189:2022 Clause 7.3.2 - Validation and Verification of Examination Procedures

ISO 15189:2022 Clause 7.3.2 - Validation and Verification of Examination Procedures

  Required Evidence

  • Validation/verification      plan
  • Defined intended use
  • Acceptance criteria
  • Validation protocol
  • Approval before clinical implementation

Examples

  • Validation of a modified ADAMTS13 activity assay
  • Verification of a CE-marked VWF:GPIbM assay on a new analyser
  • Validation of an LDT platelet function assay

ISO 15189:2022 Clause 7.2 - Selection, Verification and Validation of Methods

ISO 15189:2022 Clause 7.3.2 - Validation and Verification of Examination Procedures

ISO 15189:2022 Clause 7.3.2 - Validation and Verification of Examination Procedures

  Required Evidence

  • Method comparison studies
  • Bias assessment
  • Performance against manufacturer claims
  • Clinical suitability evaluation

Examples

  • Comparison   of Technofluor FRET ADAMTS13 against a reference method
  • Evaluation of VWF assay performance on different platforms 

ISO 15189:2022 Clause 7.3.7 - Examination Procedure Performance Characteristics

ISO 15189:2022 Clause 7.3.2 - Validation and Verification of Examination Procedures

ISO 15189:2022 Clause 7.3.7 - Examination Procedure Performance Characteristics

   Required Evidence

  • Precision studies
  • Accuracy assessment
  • Linearity studies
  • Analytical measurement range
  • Detection limits
  • Interference studies

Examples

  • Repeatability and reproducibility of ADAMTS13 activity testing
  • Carryover studies for coagulation analysers
  • Haemolysis and lipaemia interference assessments

ISO 15189:2022 Clause 7.3.4 - Measurement Uncertainty

ISO 15189:2022 Clause 7.3.5 - Reference Intervals and Clinical Decision Limits

ISO 15189:2022 Clause 7.3.7 - Examination Procedure Performance Characteristics

  Required Evidence

  • Uncertainty calculations
  • Supporting statistical methodology
  • Periodic review of estimates

Examples

  • Measurement uncertainty for ADAMTS13 activity at clinically relevant decision points
  • Uncertainty estimates for Factor VIII assays 

ISO 15189:2022 Clause 7.4 - Pre-Examination Processes

ISO 15189:2022 Clause 7.3.5 - Reference Intervals and Clinical Decision Limits

ISO 15189:2022 Clause 7.3.5 - Reference Intervals and Clinical Decision Limits

  Required Evidence

  • Sample stability studies
  • Storage condition validation
  • Transport validation
  • Specimen acceptance criteria

Examples

  • Verification of frozen plasma storage claims
  • Assessment of ADAMTS13 stability following transport delays 

ISO 15189:2022 Clause 7.3.5 - Reference Intervals and Clinical Decision Limits

ISO 15189:2022 Clause 7.3.5 - Reference Intervals and Clinical Decision Limits

ISO 15189:2022 Clause 7.3.5 - Reference Intervals and Clinical Decision Limits

  

Required Evidence

  • Reference interval verification
  • Clinical decision-point verification
  • Supporting patient population data

Examples

  • Verification of ADAMTS13 activity cut-off (<10%) for TTP diagnosis
  • Validation of local VWF reference ranges

ISO 15189:2022 Clause 7.3.5 - Reference Intervals and Clinical Decision Limits

ISO 15189:2022 Clause 7.3.5 - Reference Intervals and Clinical Decision Limits

ISO 15189:2022 Clause 7.3.5 - Reference Intervals and Clinical Decision Limits

  Required Evidence

  • Internal Quality Control (IQC)
  • External Quality Assessment (EQA)
  • Trend analysis
  • Corrective action records

Examples

  • ADAMTS13 EQA participation records
  • Levy-Jennings monitoring of specialist haemostasis assays

ISO 15189:2022 Clause 8.5 - Risks and Opportunities

ISO 15189:2022 Clause 7.3.5 - Reference Intervals and Clinical Decision Limits

ISO 15189:2022 Clause 7.3.5 - Reference Intervals and Clinical Decision Limits

    Required Evidence

  • Risk assessments
  • Mitigation plans
  • Change control documentation

Examples

  • Risk assessment for introducing a modified ADAMTS13 assay
  • Impact assessment following reagent or analyser changes 

ISO 15189:2022 Clause 8.6 - Improvement

ISO 15189:2022 Clause 7.3.5 - Reference Intervals and Clinical Decision Limits

ISO 15189:2022 Clause 8.6 - Improvement

    Required Evidence

  • Non-conformance investigations
  • Corrective actions
  • Continuous improvement records

Examples

  • Root cause analysis following EQA failure
  • Process improvement following audit findings

   

What we can support

Common UKAS Findings in Specialist Haemostasis

Common UKAS Findings in Specialist Haemostasis

Common UKAS Findings in Specialist Haemostasis

Laboratories frequently hold validation data but cannot demonstrate:

  • A  clearly documented Intended Use
  • Formal approval before go-live
  • Adequate risk assessment for modified methods
  • Verification of decision limits and cut-offs
  • Sufficient sample stability evidence
  • Measurement uncertainty calculations
  • Clinical justification for assay modifications
  • Traceable competency records
  • Complete validation reports linking evidence to ISO 15189 requirements

Our Support

Common UKAS Findings in Specialist Haemostasis

Common UKAS Findings in Specialist Haemostasis

We can produce a complete ISO 15189 clause-mapped validation package for specialist haemostasis assays, including:

  • ADAMTS13 activity and inhibitor assays
  • TTP diagnostic pathways
  • von Willebrand disease testing
  • Lupus anticoagulant testing
  • Factor assays
  • Platelet function studies
  • Thrombophilia investigations

We translate UKAS requirements into practical evidence packages that are inspection-ready and fully aligned with ISO 15189.

Validation documentation review

 Already completed your study?


You don't necessarily need to start again.

ISOCHECKS can review your existing validation package and provide an independent assessment of:

  • Study design
  • Was the study appropriate for the intended use?
  • Sample selection
  • Were the samples and concentrations appropriate?
  • Acceptance criteria
  • Were appropriate performance requirements established before testing?
  • Data analysis
  • Has the data been analysed and presented appropriately?
  • Conclusions
  • Do the conclusions logically follow from the evidence?
  • Documentation
  • Can another competent person understand what was done, why it was done and what was concluded?


The objective is to help you turn technical data into a clear, defensible validation package.


Talk to ISOCHECKS today

Frequently Asked Questions

Please reach us at Info@isochecks.co.uk if you cannot find an answer to your question.

 The appropriate approach depends on the examination method, intended use, manufacturer's claims and any modifications made by the laboratory.  We   

can help you determine the appropriate strategy for your specific situation.


 Yes. We can provide an independent review of existing validation or verification evidence and identify potential gaps. 


 Yes. We can help laboratories understand validation-related findings and develop an appropriate response and improvement plan.


 Yes. We can help laboratories understand validation-related findings and develop an appropriate response and improvement plan.


  Yes. We can work collaboratively with laboratory scientists and quality teams or provide more independent project support, depending on your requirements.


Using the assay outside the manufacturer's IFU?

Unsure whether your proposed IVD use requires verification or full validation? We can help define the evidence required .

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