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etoh level

Hi,
Is it standard practice to draw etoh levels using betadyne to disinfect, and
can isopropyl wipes cause a false positive?
backbeat

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posted by admin in Uncategorized and have Comments (3)

3 Responses to “etoh level”

  1. admin says:

    "backbeat" <backbeat…@verizon.net> wrote in message

    news:F%E%c.6591$Gi5.3360@trndny05…
    > Hi,
    > Is it standard practice to draw etoh levels using betadyne to disinfect,
    and
    > can isopropyl wipes cause a false positive?
    > backbeat

    Some places do but then a tiny trace of alcohol in the 1 or 2 mg/dl range is
    pretty much just simply ignored. Legal limit depending on your state are in
    the 80 or 100 range.

  2. admin says:

    > Is it standard practice to draw etoh levels using betadyne to disinfect,
    and
    > can isopropyl wipes cause a false positive?

    It’s pretty standard in the Midwest to draw blood alcohols with Betadine
    skin preps, but it depends on the assay being used whether isopropanol will
    cross-react, even if used.  Some inserts prohibit alcohol wipes as an
    armprep, while others say there is no significant interference, even at high
    lethal levels.

    I think most legal labs use flouride tube headspace analysis that is ethanol
    specific, and could even tell if there was any isopropyl alcohol there along
    with the ethanol.

       Larry

  3. admin says:

    Ok, thanks. Some say use betadyne for legal reasons, but it doesn’t appear
    there is any science to it, just that a lawyer could argue contamination,
    and maybe win if the jury buys it, and the prosection doesn’t know how to
    prove that theory wrong. But a pos etoh that was maybe an add-on test in an
    ER as part of toxicology, would probably be accurate even if isopropyl was
    used orginally, I guess.
    backbeat

    "LC" <Lcs…@juno.com> wrote in message

    news:tiL%c.331110$OB3.110601@bgtnsc05-news.ops.worldnet.att.net…

    - Hide quoted text — Show quoted text -

    > > Is it standard practice to draw etoh levels using betadyne to disinfect,
    > and
    > > can isopropyl wipes cause a false positive?

    > It’s pretty standard in the Midwest to draw blood alcohols with Betadine
    > skin preps, but it depends on the assay being used whether isopropanol
    will
    > cross-react, even if used.  Some inserts prohibit alcohol wipes as an
    > armprep, while others say there is no significant interference, even at
    high
    > lethal levels.

    > I think most legal labs use flouride tube headspace analysis that is
    ethanol
    > specific, and could even tell if there was any isopropyl alcohol there
    along
    > with the ethanol.

    >    Larry