Peer-reviewed veterinary case report
Hand-held electronic area planimeter.
- Journal:
- IEEE transactions on bio-medical engineering
- Year:
- 1995
- Authors:
- Kath, G S et al.
- Affiliation:
- Merck Research Laboratory · United States
Plain-English summary
This paper talks about a new portable device designed to measure the size of skin reactions, called wheals, which can occur during allergy tests. The device works by being placed over the wheal while a scientist traces its edges using a special optical tool. It then calculates the area of the wheal and shows the results on a digital screen. This handy tool can measure areas up to about the size of a small postcard with very precise accuracy. Overall, this device allows for easy and accurate measurement of skin reactions without needing to touch the area.
Abstract
The focus of this paper is to describe the development and fabrication of a portable hand-held electronic area planimeter to measure wheal areas during dermatitis assays. The planimeter straddles over the wheal and the scientist traces the wheal's perimeter using an optical beam splitter/cross-hair and a miniature x-y table. Transducers connected to the x-y table and an electronic circuit performs the area integration and displays the data on a digital panel meter. The apparatus permits noncontact measurement of areas up to 1000 mm2 with a resolution of 1 mm2.
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Search related cases →Original publication: https://pubmed.ncbi.nlm.nih.gov/7558069/