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Re: US Bill: Mandatory KI Stockpiling
Wes
My understanding is that the Na ion is thought to be more of a hazard than
the K ion.
Another point to add to this discussion is that most, if not all, risk
calculations assume that the % uptake is that given in ICRP Pub. 71 or
earlier reports (~30%). The average NA value is usually more like 5%.
John R Johnson
4535 West 9th Ave.
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(604) 222-9840
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----- Original Message -----
From: Wes Van Pelt <wesvanpelt@ATT.NET>
To: radsafe <radsafe@list.vanderbilt.edu>; Tim <tstead@ntirs.org>
Cc: Wesley R. Van Pelt <wesvanpelt@ATT.NET>
Sent: Saturday, November 17, 2001 8:50 AM
Subject: US Bill: Mandatory KI Stockpiling
> All,
>
> If the K in KI is potentially harmful to the heart, why not use NaI as a
> thyroid blocker instead of KI? I always thought it was simply the iodine
ion
> (I+) that was important in blocking further uptake of radioiodine.
>
> Wes
>
> Wesley R. Van Pelt, PhD, CIH, CHP
> Wesley R. Van Pelt Associates, Inc.
> Consulting in Radiation Safety and Environmental Radioactivity.
> http://home.att.net/~wesvanpelt/Radiation.html
> mailto:wesvanpelt@att.net
>
> -----Original Message-----
> From: owner-radsafe@list.vanderbilt.edu
> [mailto:owner-radsafe@list.vanderbilt.edu]On Behalf Of Tim
> Sent: Friday, November 16, 2001 10:20 PM
> To: BLReider@AOL.COM; radsafe
> Subject: RE: [Fwd: [OEM] [OEM!] US Bill: Mandatory KI Stockpiling]
>
> Hyperkalemia (high potassium level in the blood) can
> easily cause asystole (cardiac arrest). The heart
> works by having an electrolyte potential across the
> cell membrane and potassium plays an important role in
> myocardial repolarization. In hyperkalemia, the heart
> cells cannot repolarize and therefore asystole ensues.
>
> Hyperkalemia is nothing to mess around with. The
> heart does NOT like too much potassium at all.
>
> So, I guess if we distribute KI, then we should also
> distribute CaCl becuase CaCl is used to treat
> hyperkalemia. Problem is, CaCl in improper doses can
> also cause cardiac arrest! Its a loose-loose
> situation unless you know what you are doing.
>
> Of course, patients taking cardiac glycosides (e.g.
> digitalis) are even more susceptible to harmful side
> effects.
>
> So, how do you know if you have too much K in your
> blood? Well, you could hook yourself up to a cardiac
> monitor and lok for peaked T waves. I guess we now
> should distribute cardiac monitors with each KI dose?
>
> I think I have made my point.
>
> Tim Steadham, P.E.
>
>
>
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