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  • 1.  Gas pathway testing: inorganic gases (maybe 18562)

    This message was posted by a user wishing to remain anonymous
    Posted 29-Sep-2017 11:02
    This message was posted by a user wishing to remain anonymous

    ​Does anyone know how to respond to FDA to requests for inorganic (ozone, carbon monoxide, carbon dioxide) gases in a gas pathway? Perhaps ISO-18562?

    I can't find it mentioned in any guidance from FDA, or how to run the test, but I've seen some 510(k) summaries that mention it. Not sure what to do or what is expected or labs that can do it.


  • 2.  RE: Gas pathway testing: inorganic gases (maybe 18562)

    Posted 29-Sep-2017 12:10

    Hi Anonymous,

    With respect to gas pathway devices, I have seen a considerable shift in practice over the past few years.  I don't know the background, but I understand that industry/regulators started to recognize that the classification categories in ISO 10993 do not really fit respiratory devices well, thus leading to the development of ISO 18562 (as you pointed out).

    I have not personally dealt with any testing to ISO 18562, however I did have a lot of involvement with testing while ISO 18562 was in development, when FDA was making requests for additional testing (above what was required by ISO 10993 and what I believe to have previously been common practice), which included E&L testing and VoCs.  During the period when ISO 18562 was in development, the large test labs were pretty well aware/involved, so I would think that most, if not all, would be able to give you advice and conduct testing for you (since it is in their best interest to be able to provide services that meet current regulations/practices/expectations).  NAMSA and WuXi Apptec are both pretty large and might be worth reaching out to - I am not familiar with others but I'm sure there are tons!

    Hope this helps!

    Liz



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    Elizabeth Goldstein RAC
    Regulatory Affairs Project Manager
    California
    United States
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  • 3.  RE: Gas pathway testing: inorganic gases (maybe 18562)

    This message was posted by a user wishing to remain anonymous
    Posted 02-Oct-2017 08:58
    This message was posted by a user wishing to remain anonymous

    ​Liz,

    Thanks for the reply.

    I was asking specifically related to inorganic gas testing specified in ISO 18562. The client did to VOCs, but FDA is now asking for this, and the lab that did the VOCs is not familiar with how to do them.


  • 4.  RE: Gas pathway testing: inorganic gases (maybe 18562)

    Posted 03-Oct-2017 12:28
    ​I've heard UL might do the testing, but I haven't spoken to them directly so can't verify.  Might be worth a shot to ask them though?

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    Elizabeth Goldstein RAC
    Regulatory Affairs Project Manager
    California
    United States
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  • 5.  RE: Gas pathway testing: inorganic gases (maybe 18562)

    This message was posted by a user wishing to remain anonymous
    Posted 04-Oct-2017 12:48
    This message was posted by a user wishing to remain anonymous

    ​Hi,
    You may get some information on the test through a free Webinar that UL organized on ISO 18562. Elizabeth has given some good resources. You may also want to check with Toxikon that does biological testing.



  • 6.  RE: Gas pathway testing: inorganic gases (maybe 18562)

    This message was posted by a user wishing to remain anonymous
    Posted 03-Oct-2017 14:28
    This message was posted by a user wishing to remain anonymous

    The limits are stated within 18562 for both PM and VOC.  You should disclose those limits to your prospective labs to see if they can test to the limits specified in the standard, as most labs have prescribed criteria for testing to 10993 only.  You should also disclose to those labs the materials that your device is using in direct contact with this pathway, as certain materials may contribute additional compounds during testing.


  • 7.  RE: Gas pathway testing: inorganic gases (maybe 18562)

    Posted 04-Oct-2017 18:03
    ​I believe Wuxi Apptec and Nelson Labs do this testing. Definitely worth talking to them. Good luck and it would be nice if you can share your findings here.

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    Virginia Anastassova RAC
    RA Manager, Senior QA Specialist
    Starfish Medical
    Victoria BC
    Canada
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