Emergent Prep for IV Dye in Acute Stroke Patients With Allergy

Study Overview
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Brief Summary
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Our institution implemented a protocol to administer an emergent IV dye preparation for stroke alert patients requiring advanced neuroimaging. The emergent IV dye preparation consists of diphenhydramine 50 mg IV once, famotidine 20 mg IV once, and dexamethasone 10 mg IV once, followed immediately by Computed Tomography (CT) Angiography and/or CT Perfusion.

Detailed Description
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Patients with documented IV dye allergy were given emergent dye preparation immediately prior to advanced neuroimaging that consisted of three drugs: diphenydramine 50 mg IV, famotidine 20 mg IV, and dexamethasone 10 mg IV. In contrast, elective dye preparation commonly done in non-emergent or outpatient settings is separated into two different options. The first option is for a patient to take Prednisone 50 mg three times prior to the study: one tablet by mouth 13 hours prior, one tablet by mouth seven hours prior, and the last tablet by mouth one hour prior to the study. The second option is for the patient to be prescribed dexamethasone 4 mg or 6 mg dispensed four times: two tablets by mouth 12 hours prior to the study and 2 tablets by mouth one hour prior to the study. If the patient is prescribed dexamethasone, they also take famotidine 150 mg and diphenhydramine 50 mg, both drugs by mouth 12 hours prior and one hour prior to the study. To evaluate the relationship between dye allergy and any adverse reactions, our study's inclusion criteria consisted of all stroke alert patients from 2021-2022 who required advanced neuroimaging of CTP/CTA and received emergent IV dye preparation. Exclusion criteria included patients who reported dye allergies specific to airway edema or anaphylaxis. A retrospective chart review was done to evaluate stroke patient's stated allergies, the number of patients that received emergent IV dye preparation, and any adverse reactions despite the emergent IV dye preparation. Data was then analyzed to determine if there was a relationship between prior contrast dye allergy and allergic reactions that occurred after emergent IV dye administration.

Official Title
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Emergent Intravenous Dye Preparation for Acute Stroke Patients With a History of Intravenous Dye Allergy

Conditions
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Stroke, Dye Allergy

Intervention / Treatment
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* Combination Product: Emergent IV Dye Preparation


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Stroke alert patients that required advanced neuroimaging of CTP/CTA and received emergent IV dye preparation - Exclusion Criteria: patients who reported dye allergies specific to airway edema or anaphylaxis -
Sexes Eligible for Study
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All

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Emergent IV Dye Preparation & Administration<br>The emergent IV dye drug trio is administered and followed immediately by Computed Tomography (CT) Angiography and/or CT Perfusion. | Combination Product: Emergent IV Dye Preparation<br>* Diphenhydramine 50 mg IV once, famotidine 20 mg IV once, and dexamethasone 10 mg IV once<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Adverse Reactions | Unwanted side effects of medication administration, including but not limited to itching, rash, mild shortness of breath etc. | 24 Hours | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Stroke, Emergent IV Dye Prep, Dye Allergy