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  • 1.  Criteria for risk acceptability - considering regulatory requirements

    This message was posted by a user wishing to remain anonymous
    Posted 07-Mar-2024 09:06
    This message was posted by a user wishing to remain anonymous

    ISO 14971:2019 clause 4.2 requires that:

    Top management shall define and document a policy for establishing criteria for risk acceptability. This policy shall provide a framework that ensures that criteria for risk acceptability are based on applicable national/regional regulations, relevant international standards, take into account the generally acknowledged state of the art, and known stakeholder concerns.

    I am aware of the accompanying guidance in the ISO TR 24971 (Annex C) on the relationship between the policy, risk acceptability, criteria, risk estimation and evaluation. 

    My question is specifically to do with considering regulatory requirements when establishing a criteria for risk acceptability. 

    A common example cited in this example is considering EU MDR and IVDR, and specifically the "as far as possible without affecting benefit/risk ratio" approach to risk control. However, I cannot understand, apart from EU MDR/IVDR, how would one use regulatory requirements to inform the risk acceptability criteria? Let's assume there is an implantable medical device that is intended to be commercialised in US only. How can I now use the applicable US regulatory requirements (say in 21CFR878.4018 Hydrophilic wound dressing)? Should the scope of regulatory requirements be limited to those related to the specific device / classification or should it be broader (say the QSR)?  Should the scope also consider international standards? But this is the next factor to consider in this normative requirement of ISO 14971 and are not quite "regulatory requirements" unless they're recognised by the FDA (?).

    I am well familiar with risk management and regulatory requirements, but I can't quite seem to connect the two when it comes to establishing the criteria for risk acceptability. Looking for practical advise and guidance for the hypothetical device above. 



  • 2.  RE: Criteria for risk acceptability - considering regulatory requirements

    Posted 08-Mar-2024 01:05

    It sounds as if you are trying to do too much at once within the "policy for establishing criteria for risk acceptability" as described in the standard.  As noted in ISO TIR24971:2020 "Medical devices- Guidance on the application of ISO 14971," the policy itself is intended establish a framework that "directs and guides the establishing of the criteria" that is called out in the risk management plan.  This policy does not need to refer to individual regulations or standards, rather it should ensure that the risk acceptability criteria consider them, as applicable.  If you consider the example in Annex C of the guidance you will see that the generic policy calls out the need to consider and take into account the factors referenced in the standard, but does not name which specifically as this should be determined based on the device/intended use and intended markets.  

    On the other hand, the actual risk acceptability criteria in the risk management plan should be specific enough to ensure that they can be met by the planned risk management activities, see Table C.1 of ISO TIR24971:2020 for a useful example about International Standards.  So too, your design and development inputs should be considering applicable regulatory requirements and standards. 



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    Christopher Erwin
    WL Gore & Associates Inc
    Scottsdale AZ
    United States
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  • 3.  RE: Criteria for risk acceptability - considering regulatory requirements

    Posted 10-Mar-2024 13:40

    Christopher is quite correct. Think of it this way, the policy applies to all medical devices produced by the company.  The policy establishes a process to consider in establishing a criteria for a single device type as described in the plan for the individual device type. 

    So, again, the policy is general for all products and describes what the management considers the direction of the company in risk. The criteria are specific for a particular device being developed. If a company, for instance, develops Class1 and Class 3 devices you would expect the low risk Class 1 to have different criteria for risk acceptability than the higher risk Class 3 devices, yet the company risk policy is the same general rules for establishing those criteria. 

    Hope this helps. 



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    Edwin Bills
    Edwin Bills Consultant
    ASQ Fellow CQE, CQA, CQM/OE, RAPS RAC
    elb@edwinbillsconsultant.com
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  • 4.  RE: Criteria for risk acceptability - considering regulatory requirements

    This message was posted by a user wishing to remain anonymous
    Posted 11-Mar-2024 09:11
    This message was posted by a user wishing to remain anonymous

    US rules are mostly worded more generally. The devices should be safe and effective. The probable benefits should outweigh the probable risks. There should not be an unreasonable risk of substantial harm to public health. Risk and benefit judgments should be based on valid scientific evidence.

    If your devices are all low risk, these considerations may be implied by your adoption of ISO 14971, and not need to be stated explicitly. On the other hand, if you're working on high-risk devices, it may be helpful guidance for your team to talk about the company policy on weighing and assessing the risk/benefit balance.

    https://www.fda.gov/medical-devices/regulatory-controls/general-controls-medical-devices

    https://www.fda.gov/regulatory-information/search-fda-guidance-documents/factors-consider-when-making-benefit-risk-determinations-medical-device-premarket-approval-and-de




  • 5.  RE: Criteria for risk acceptability - considering regulatory requirements

    Posted 10-Mar-2024 10:23

    Reducing your question to the bare minimum, you are asking about the use of US regulatory requirements which don't seem to fit into the risk management structure.

    ISO 14971:2019 gives you the "out" when it says, "based on applicable national/regional regulations". For your example, there are no applicable regulations, so they don't contribute to the risk acceptability criteria.



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    Dan O'Leary CQA, CQE
    Swanzey NH
    United States
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  • 6.  RE: Criteria for risk acceptability - considering regulatory requirements

    This message was posted by a user wishing to remain anonymous
    Posted 11-Mar-2024 09:07
    This message was posted by a user wishing to remain anonymous

    Thanks for your responses! My question was more to do with using the policy to establish the risk acceptability criteria, rather than the policy itself. 

    Dan's advise also makes perfect sense to me as reducing it to the bare minimum, there are no US requirements that would provide any input to establishment of the risk acceptability matrix. 




  • 7.  RE: Criteria for risk acceptability - considering regulatory requirements

    Posted 11-Mar-2024 10:35

    Cutting through all the high level stuff, the policy will be something like, "Reduce the risk to as low as reasonably practical".

    When you set up the risk matrix, you will tailor the frequency and severity to the device. For example, if the device is an oral digital thermometer, the severity would not include death, but if it were an automated external defibrillator, severity would include death. Various products could have different frequency scales as well.

    If you set up the risk matrix correctly, then the cell in the lower left hand corner is the lowest severity and the lowest frequency. (Think of Cartesian coordinates marked off into the cells.) In practical terms, the policy means that the residual risk cell is as low as practical and as far to left as practical.



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    Dan O'Leary CQA, CQE
    Swanzey NH
    United States
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