From: fred murphy <[EMAIL PROTECTED]> This is an interesting question that i cannot find a definative answer for. I assume that by having a previous reaction to shellfish this increases your hypersensitivity and you are then more vulnerable to physiological changes (cascade and mediator systems) brought about by contrast media. A good article that considers contrast agent reactions, but no mention of shellfish! is:
Mechanisms of Adverse Reactions to Radiologic Contrast Media,Prevention Strategies, and Appropriate Responses. Paula Lenane Seminars in Radiologic Technology vol 3, no 3(August) 1995. Regards to Nick, i hope the job is going well. Fred Murphy Undergraduate Course Director. University of Wales, Bangor On Tue, 22 Jul 2003 17:30:12 +0800 Teresa Ong <[EMAIL PROTECTED]> wrote: > From: "Teresa Ong" <[EMAIL PROTECTED]> > > As one who cannot eat shellfish and also has an iodine allergy, I feel > they are linked. > > Teresa Ong > > > ----- Original Message ----- > From: "Dieter" <[EMAIL PROTECTED]> > To: <undisclosed-recipients:> > Sent: Tuesday, July 22, 2003 8:37 AM > Subject: Re: Re: [AIRNEWS] Shellfish and IV contrast allergy? > > > > From: Dieter <[EMAIL PROTECTED]> > > > > True on the prednisalone but it is a cortisone. > > > > I am currently making some enquiries on the use of alternate IV > > contrast > > > > agents for CT and will let you know my findings in a few days. > > > > It is not an orgainsed study but someone could do a paper on the > > subject. I haven't the time. > > > > Dieter > > > > At 09:00 21/07/2003 +0200, you wrote: > > >Woops prednisalone isnt, an anti histamine .. we use > > >Chlorpheniramine > > > >"piriton" in our hospital but I agree reactions to contrast seem > > >very > > > >unpredictable .. like you I have seen people who ewere previously > > >OK > > >be > > > > >bad and and previously reacted OK second like around... The > > >question > > >about shelfish I think comes from a frequent query on the xray2000 > > >website from Students some uni is setting a question involving the > > >shelfish > > > > > >Cheers > > > > > >Nick > > > > > > > > >Dieter <[EMAIL PROTECTED]> wrote on 21.07.2003, 00:26:25: > > > > As far as I was aware, the iodine bound in non-ionic iv contrast > > > > has > > > > > > different reactive properties to the iodine found in shellfish. > > > > I > > > > > was under the impression that a shellfish allergy was not > > > > necessarily as precurser to an iodinated iv contrast allergy. We > > > > injected a patient a few days ago that had an allergy to topical > > > > iodine. She is still fine and came back in a few days later with > > > > no > > > > > > ill > > > > Sender: [EMAIL PROTECTED] > > > > Precedence: bulk > > > > Reply-To: AIRNEWS > > > > > > > > From: Dieter > > > > > > > > effects to collect her films. > > > > > > > > We have also had a case of a previuos anaphylatic reaction (put > > > > the patient in ICU) to ionic contrast (cardiac cath). While the > > > > patient > > > > > > was still intubated the patient came down for a abdo/pelvis CT > > > > and > > > > > was injected with 100 mls of non-ionic contrast (the ICU staff > > > > failed to tell > > radiology > > > > about > > > > the previuos reaction and had not documented it in the > > > > notes.....oops). The patient showed no indication of rection to > > that > > > > injection and recieved another a week later. > > > > > > > > I personally would be hesitant injecting anyone with any > > > > previous > > > > known allergy to any type of iodine unless absolutely necessary > > > > and would take > > > > > > > > the precaution of predosing with antihistamines ie prednisolone > > > > and the day before and hydrocortisone on the day of examination. > > > > > > > > Bring on cheaper Gadolinium so we can use that as an > > > > alternative. > > > > > > > > Dieter Halden > > > > Nepean Hospital > > > > NSW CTAP > > > > > > > > At 08:45 18/07/2003 +1000, you wrote: > > > > > From: Geoffrey Dick > > > > > > > > > >Is there any documented evidence that there is a relationship > > > > >between allergy to seafood/shellfish and an increased chance of > > > > >an iv contrast reaction? Your thoughts on the matter > > > > > > > > > >Geoffrey Dick > > > > >CT Supervisor Dandenong Hospital > > > > >Ext:48193 > > > > >03-9554-8193 +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+= This message is being broadcast by AIRNEWS, the Australian Institute of Radiography list Server Send messages to [EMAIL PROTECTED] For assistance send mail to [EMAIL PROTECTED] Commands should be sent to [EMAIL PROTECTED] Opinions expressed on this list are not necessarily those of the moderator, his assistants or those of the A.I.R.
