From: [EMAIL PROTECTED] Gday All
As far as I am aware, having looked at a few of the product data for non-ionic contrast we use, it would appear that any allergic history including hay fever, asthma etc should be considered significant, though not a contraindication to ICM. Some of the product literature I have read does not mention shell fish. The following I have found typical of information I have read. Risk factors related to idiosyncratic reactions ----------------------------------------------- Idiosyncratic reactions may occur in people with a previous reaction to ionic or nonionic ICM, asthma, and/or food or medication allergies. Previous reactions to ionic or nonionic ICM increases the relative risk of repeat reaction 3.3- to 6.9-fold compared with the risk in general population. Approximately 60% of patients who had hives after ICM administration in the past have hives with a repeat exposure. Similarly, facial edema, difficulty breathing, and bronchospasm recur in 68%, 59%, and 38% of patients, respectively. Reactions do not recur in all patients. Patients with a history of a reaction to ICM may report having undergone a recent contrast-enhanced study without adverse manifestations. Nevertheless, these patients still have a higher risk than that of the general population. People with asthma have 1.2-2.5 times the risk of the general population. When reactions occur, they are more likely to be severe. Severe reactions are 5-9 times more common in people with asthma than in others. Patients with allergies, including hay fever, are 1.5-3 times more likely to have an adverse reaction to ICM than other people. No consistent data warrant the use of any unique precautions in patients who have seafood or shellfish allergies. Another fact about Shellfish ---------------------------- Hepatitis A (HAV), previously known as infectious hepatitis, can occur as a sporadic or epidemic infection. It is spread by the faecal-oral route, with outbreaks frequently associated with eating shellfish. Jim de Jong Radiographer +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+= 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.
