risk-based qc for clinical laboratories · (iso 15190; iso/iec guide 51) • harm - physical injury...
TRANSCRIPT
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Risk-Based QC for Clinical Laboratories
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Learning Objectives
• Describe the concept of risk management in laboratory medicine
• Summarize the basic process for developing a risk-based QC plan
• List resources that can be utilized as an aid to the process
• State the five components evaluated in a risk assessment
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What is risk?
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What is Risk?
• Combination of the probability of occurrence of harm and the severity of that harm (ISO 15190; ISO/IEC Guide 51)
• Harm - physical injury or damage to the health of people, or damage to property or the environment [ISO/IEC Guide 51:1999, definition 3.3]
• Severity - measure of the possible consequences of a hazard [ISO 14971- 2007 definition 2.25]
• Hazard - potential source of harm [ISO/IEC Guide 51:1999, definition 3.5]
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Why now? Risk assessment for laboratories?
• Consolidation and decreasing budgets
• One size doesn’t fit all
• What is appropriate QC frequency?
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Other Factors Favoring Risk Approach
• Protect the patient’s well being
• Guard the laboratory’s reputation
• ISO 15189 requires risk to be addressed
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4.14.6 Risk Management
“The laboratory shall evaluate the impact of work processes and potential failures on examination results as they affect patient safety, and shall modify processes to reduce or eliminate the identified risks and document decisions and actions taken.”
ISO 15189: 2012
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5.6.2.2 Quality Control Materials
“Quality control materials shall be periodically examined with a frequency that is based on the stability of the procedure and the risk of harm to the patient from an erroneous result.”
ISO 15189: 2012
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Creating a Risk-Based Plan
VERIFY EFFECTIVENESS
IMPLEMENT THE PLAN
DEVELOP THE QC
PLAN
RISK ANALYSIS
PLANNING
ENLIGHTENMENT
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Enlightenment • ISO 14971: 2012
Medical devices – Application of risk management to medical devices
• ISO/TS 22367: 2009 Medical laboratories – Reduction of error through risk management and continual improvement
• CLSI EP23-A Laboratory QC Based on Risk Management
• Westgard: Six Sigma Risk Analysis • Testing Documentation…
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Gathering information • Internal audits • Laboratory complaint logs/ user surveys • Instructions for use (IFU) • Historical laboratory QC, calibration and PT records • Instrument manual • Manufacturer blogs or webpages for users • FDA Medical Device report database search
– https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfMDR/Search.cfm
• PT summary reports • Inter-laboratory reports provided by control
manufacturers
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Specific Information from Manufacturers
• Reliability scores • Mean time between failure (MTBF) • Black box processes when necessary • Information about on-board (embedded) controls • Information about electronic controls
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Planning
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Before you start
Put together a small quality team – 5-7 members – Stakeholders – Desirable characteristics
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Team Members: Key Characteristics • Inquisitive • Team player • Knowledgeable • Open minded • Creative thinker • Good communicator • Pragmatic • Able to finish a task
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Team Dynamics
• Have a facilitator to keep team on track • Have objectives for each team meeting • Brainstorm – open, non-judgmental
discussion • All members have equal standing
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Risk Analysis
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Some Sources of Risk
• Communication processes • Environmental • Knowledge of test operators • Management commitment • Outside influences • Resources • Technical components • Process/Procedure • Financial – decisions based on cost not quality
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Process Map: Example
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5 Components Evaluated
– Specimen
– Environment
– Reagent
– Test system
– Personnel
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Test System Pre-Analytical Calibration
Calibration Verification
Maintenance daily, w / m / semi-annual Electrical Monitoring, Surge Protection Dedicated Circuit Water Supply (if required) Water quality Water integrity (air) Humidity (mfr requirement) Temp. (mfr requirement)
PT Performance
Calibration of ancillary equip
Analytical Consumables (quality)
Reagent dispense
Sample dispense
Reaction Chamber Temperature Measurement Filter wheel Light source integrity Clot detection Interfering substances Quality Determination QC approach used QC materials used QC frequency QC Rules Patient risk (# patients between QCs)
Post-Analytical Results: review / approve
Result Transmission
Retrospective Review
Trend Analysis
Sigma Metrics
Frequency of recalibration
Freq. of Device Failures
Verification of Test Results
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Information Gathering / Analysis Test System for POCT
Pre-Analytical Calibration
Calibration Verification
Maintenance daily, w / m / semi-annual Electrical Monitoring, Surge Prot Dedicated Circuit, Battery Water Supply (if required) Water quality Water integrity (air) Humidity (mfr requirement) Temp. (mfr requirement)
PT Performance
Calibration of ancillary equip
Analytical Consumables (quality)
Reagent dispense
Sample dispense
Reaction Chamber Temperature, Black Box Measurement Filter wheel Light source integrity Clot detection Interfering substances Quality Determination QC approach used QC materials used QC frequency QC Rules Patient risk (# patients between QCs)
Post-Analytical Results: review / approve
Result Transmission
Test Report
Retrospective Review
Trend Analysis
Sigma Metrics
Frequency of recalibration
Freq. of Device Failures
Verification of Test Results
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Analysis Brainstorming a POCT Test
PROCESS MAPPING
OR FISHBONE DIAGRAM
Analytical Reaction Chamber Black Box Measurement Interfering Substances Quality Determination QC approach used QC materials used QC frequency Patient risk (# patients between QCs)
Possible Hazard Points
What Can Go Wrong?
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Analysis Brainstorming a POCT Test
PROCESS MAPPING
OR FISHBONE DIAGRAM
Analytical Reaction Chamber Black Box Measurement Interfering Substances Quality Determination QC approach used QC materials used QC frequency Patient risk (# patients between QCs)
Possible Hazard Points
• Does the the device manual or the product insert describe in detail the analytical sequence?
• Does the product insert, the device manual or the manufacturer describe in sufficient detail how the function checks work and are themselves
• Has the manufacturer provided a product reliability score or the mean time between failure?
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Analysis Brainstorming a POCT Test
PROCESS MAPPING
OR FISHBONE DIAGRAM
Analytical Reaction Chamber Black Box Measurement Interfering Substances Quality Determination QC approach used QC materials used QC frequency Patient risk (# patients between QCs)
Possible Hazard Points
• Does the product insert….
• How is the patient cleared for interfering substances?
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Analysis Brainstorming a POCT Test
PROCESS MAPPING
OR FISHBONE DIAGRAM
Analytical Reaction Chamber Black Box Measurement Interfering Substances Quality Determination QC approach used QC materials used QC frequency Patient risk (# patients between QCs)
Possible Hazard Points
• Does the product insert….
• How is the patient cleared for … • What QC modality is used?
Function checks only? Electronic QC only? Traditional QC?
• First party, second party or third party controls used?
• Embedded control used? • Liquid or solid phase QC? Shortcomings? • How frequently is QC frun? • Can errors/mistakes/failures/hazards be
detected immediately? • How are QC limits established? • What QC rules are used? • How many patient test results are
reported between QC testing events?
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Analysis Brainstorming a POCT Test
PROCESS MAPPING
OR FISHBONE DIAGRAM
Analytical Reaction Chamber Black Box Measurement Interfering Substances Quality Determination QC approach used QC materials used QC frequency Patient risk (# patients between QCs)
Possible Hazard Points
• Does the product insert….
• How is the patient cleared for … • What QC modality is used?
Function checks only? Electronic QC only? Traditional QC?
• First party, second party or third party controls used?
• Embedded control used? • Liquid or solid phase QC? Shortcomings? • How frequently is QC frun? • Can errors/mistakes/failures/hazards be
detected immediately? • How are QC limits established? • What QC rules are used? • How many patient test results are
reported between QC testing events?
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Risk Exposure: # Patients Between QC Events • Consider cost and feasibility of retesting versus
cost of increased control testing
• How many patient samples are affected by an error or malfunction and is undetected until the next QC event? Assume a lab testing 500 samples/day.
• 1 / month: exposure = 15,000 patients • 1 / week: exposure = 3500 patients • 1 / day: exposure = 500 patients • 1 / 8-hour shift: exposure = 63 patients • 2 / 8-hour shift: exposure = 31 patients • 1 / patient sample: exposure = 1patient
– Bracketed QC
• 1 / 20 patient samples exposure = 20
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Grading and Ranking Risk
• Can use FMEA approach – Grade (score 1-5 or 1-10) for occurrence,
severity, detection – Multiply scores to get Risk Priority Number
(RPN) – Rank for importance by RPN and Acceptance
criteria • How much risk is acceptable? Set by team
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Alternative grading system
Adapted from ISO 14971
Negligible Minor Serious Critical Catastrophic
Frequent not ok not ok not ok not ok not ok
Probable ok not ok not ok not ok not ok
Occasional ok ok ok not ok not ok
Remote ok ok ok ok not ok
Inconceivable ok ok ok ok ok
Severity of harm
Prob
abili
ty
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Develop and Implement Risk Mitigation Plan
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Response to Risk Findings
• Get more information • Accept the risk – do nothing • Reallocate resources • Eliminate the risk entirely • Transfer the risk • Develop and implement a Risk Mitigation
Plan
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Risk Mitigation Plan Must Be Based On: • Sources of potential device failures • Potential for errors/mistakes and device
failures • Impact of failures and errors/mistakes • Ability to detect failures and
errors/mistakes • Residual risk post mitigation • Unique conditions 33
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Unique Risk Conditions Affecting QC Frequency in the Plan
• Immediate application of test result • Result leads to significant medical response • Result affects diagnosis, prognosis or treatment • Low volume, infrequently performed test • Technique sensitive tests • Low sigma (<3.0) tests • Analyte stability • Use of first or second party control materials as primary
controls • Use of electronic or imbedded controls as primary
controls
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Consider Increasing QC Frequency
When: • Risk of reporting an erroneous result is
moderate to high • Risk that an erroneous result can harm a
patient • Actionable residual risk is present
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Verify Effectiveness
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Quality Assessment • On-going review for effectiveness
– No periodicity required • Resource documents (a few)
– Historical QC data – PT records – Patient result review – Specimen rejection logs – Preventive action/corrective action records – Competency assessment records
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The Risk-Based Plan
VERIFY EFFECTIVENESS
IMPLEMENT THE PLAN
DEVELOP THE QC
PLAN
RISK ANALYSIS
PLANNING
ENLIGHTENMENT
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Evaluation of residual risk
• Re-estimate risk potential after mitigation to evaluate residual risk – Is it acceptable?
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Records
No…not these
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Records This might be a bit much…..
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4.13 Control of Records
• “The laboratory shall have a documented procedure for
identification, collection, indexing, access, storage, maintenance, amendment and safe disposal of quality and technical records…
Records shall include the following… n) Risk management records”
ISO 15189: 2012
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As with all ISO quality systems –Document, document, document
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To summarize: • Form a team • Set a timeline and objectives • Set the scope • Gather relevant information • Perform the analysis
– Identify hazards and prioritize the importance • Evaluate the risk, decide on and implement
mitigations • Verify effectiveness
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To summarize
• Keep it simple
• Stay on point
• Do not rely solely on manufacturer
templates
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Most important
When doing the risk assessment
and making decisions about risk
and what is acceptable quality,
ALWAYS be guided by what is best
for your patients.
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References
• ISO 14971:2012 Medical devices – Application of risk management to medical devices
• ISO 15189:2012 Medical laboratories – Requirements for quality and competence
• ISO/TS 22367 Medical laboratories –Reduction of error through risk management and continual improvement