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Easy Application With the Multiwell™ Extract Tray |
NEW!Allergy Skin Testing Instructional Video - Broadband Version Using Morrow Brown® Disposable Allergy Test Needles With the Multiwell™ Extract Tray Video in MPG format. Size: 92.9 MB | Time: 9 min 20 secs
NEW!Allergy
Skin Testing Instructional Video - Real Media Dialup Version |
"DIP" TEST METHOD: Testing efficiency can be increased by using the MultiWell™ Extract Tray dip test system in conjunction with Morrow Brown® disposable test needles. |
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Testing Procedure After removing needles from package check the points of the needles for possible abrasion . Remove MultiWell™ tray from refrigerator and place Morrow Brown® disposable needles, point down, into each MultiWell™ used. Mark test sites on patients arm or back. Remove each needle individually, and press firmly into the corresponding test site. Each needle delivers a consistent amount of extract (surface tension of the glycerinated extract allows extract to adhere to the needle without dripping). Dispose of needle after each use. Add new needles to wells for use as needed. Read test site 15-20 minutes after application. Each well yields up to 25 tests. When testing has been completed, replace lid, insert in storage bag provided and refrigerate.
Skin Test Reaction Grading Direct comparison of wheal diameters between different patients cannot be made because of differences in skin reactivity. A whealing reaction to a skin test must be compared to a Positive Standard using glycerinated histamine and a Negative Standard (diluent) in each patient.
Method
This grading system controls for differences in reactivity between patients and in the same patient at different times of testing. For more precise reading we recommend the MORROW BROWN® millimeter caliper. If you are not presently using a positive histamine control, we recommend using 5mg/ml (1.8mg/ml of histamine base) or stronger if desired. Call if you have questions regarding use of histamine as a positive control. 1-800-686-6483 |