Color changing reagent composition for coating on needles used i

Details Color changing reagent composition for coating on needles used i Color changing reagent composition for coating on needles used i

1995-10-02

1997-07-08

Page, Thurman K.

Drug, bio-affecting and body treating compositions

Live hair or scalp treating compositions

Polymer containing

2524081, 436183, 604111, 604187, 424422, D06P 500, C09B 6700, G01N 3300, A61M 500

Patent

active

056458240

ABSTRACT:
A color changing reagent composition for coating onto syringe needles and other needle containing medical devices which upon contact with such bodily fluids as blood, mucous, saliva, and semen will cause the composition coated needle to change in color to signal a prior use and contamination with a possibly infected bodily fluid. The preferred composition is selected from the group consisting of guaiac acid, benzidine, Barfoeds solution, Benedicts solution, cresol, catechol, phenylenediamine, Haynes solution, phenol, leuco malachite green, leuco-crystal violet, peroxidase, pseudoperoxidase, orthotolodine, orthordianisidine, cumene hydroperoxide, tretramethylbenzedene and 2,2-azinodi-(3-ethylbenzyl)azoline sulfunic acid. After the coated needle comes in contact with a bodily fluid having a catalyst it will, upon oxidation, change from being in a colorless state to having a visually detectable color. The invention will reduce both the mistaken or even intentional re-use of used and possibly disease contaminated needles and provides a revolutionary means of minimizing the continued spread of such bodily fluid transfered diseases as AIDS and Hepatitis B.

REFERENCES:
patent: 3627469 (1971-12-01), Cheng
patent: 4942132 (1990-07-01), Lawrence

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