Re: Avoidance of reactions to radiocontrast media?

[John Jacobus <crispy_bird@YAHOO.COM>]

Since this is a Japanese article, can anyone say tell

me if the "radiocontrast agents" they discuss are the

same as the non-radioactive iodine based contrast

agents used in x-ray exams?  I believe they are as

they also consider the use on "nonionic dyes" which

are frequently used in such studies.



--- Stewart Farber <farbersa@optonline.net> wrote:

> Hi all:

> A thread on Radsafe recently discussed allergic

> reactions to contrast 

> agents used in certain imaging procedures. A note

> was posted to Medscape 

> recently to the following relevant

> question which may be of interest to some involved

> in medical HP or who 

> might be involved in evaluating a procedure they or

> a family member may 

> need to receive.

> 

> Stewart Farber

> =====================

> Allergic Reactions to Radiocontrast Media

> <url: http://www.medscape.com/viewarticle/463963>

> 

> Question:

> What are the guidelines on the incidence and

> avoidance of reactions to 

> radiocontrast media?

> 

> Emilia Galea

> 

> Response from Bradley E. Chipps, MD, FCCP Medical

> Director, Cystic Fibrosis 

> Center, Capital Allergy & Respiratory Disease

> Center, and Associate Medical 

> Director, Sleep Laboratory of Sutter Community

> Hospitals, Sacramento, 

> California

> 

> The guidelines for pretreatment of radiocontrast

> allergy have been 

> published in the literature.[1-3] The nonionic dyes

> are less likely to 

> cause a systemic reaction than the ionic solutions.

> This reaction is not 

> believed to be of an Ig E-mediated cause. Treatment

> with H1-and H2-blockers 

> at appropriate therapeutic doses and prednisone 1

> mg/kg given both 24 hours 

> and 1 hour before the radiology procedure is usually

> sufficient to block 

> the reaction. Montelukast 10 mg may also be added to

> this regimen.

> 

> Posted 11/25/2003

> References

> 

> 1. Hong SJ, Wong JT, Bloch KJ. Reactions to

> radiocontrast media. Allergy 

> Asthma Proc. 2002;23:347-351. Abstract

> 2. Abbott MB, Levin RH. Anaphylactoid reactions to

> radiocontrast agents. 

> Pediatr Rev. 2001;22:356.

> 3. Katayama H, Yamaguchi K, Kozuka T, Takashima T,

> Seez P, Matsuura K. 

> Adverse reactions to ionic and nonionic contrast

> media. A report from the 

> Japanese Committee on the Safety of Contrast Media.

> Radiology. 

> 1990;175:621-628. Abstract

> 







=====

+++++++++++++++++++

"Style is knowing who you are, what you want to say, and not giving a damn"

Gore Vidal



-- John

John Jacobus, MS

Certified Health Physicist

e-mail:  crispy_bird@yahoo.com



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