Specimen slide for occult blood testing
First Claim
1. A method of testing for occult blood in gastric fluid which comprises applying the gastric fluid to an unbuffered acid treated absorbent substrate containing guaiac as a reagent and applying a buffered developing solution to said substrate and observing if the substrate is colored blue.
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Accused Products
Abstract
A method and novel absorbent substrate for determining the presence of occult blood in gastric fluid. The substrate is acid treated and contains guaiac. The method includes the addition of the gastric fluid to the acid treated guaiac substrate which is developed with a buffered developing solution. Preferably the substrate is an acid treated sheet of absorbent paper and the developing solution is an aqueous buffered solution of hydrogen peroxide.
96 Citations
6 Claims
- 1. A method of testing for occult blood in gastric fluid which comprises applying the gastric fluid to an unbuffered acid treated absorbent substrate containing guaiac as a reagent and applying a buffered developing solution to said substrate and observing if the substrate is colored blue.
- 3. A specimen test slide for testing occult blood in gastric fluid comprising a panel having one or more openings, an unbuffered acid treated absorbent test strip containing guaiac underlying said panel and extending under said openings for the reception of a specimen, a pH test area on a portion of the test strip underlying one of said openings, a pH Color Comparator Scale located on said panel to compare the color obtained in the pH test area to the Comparator, an occult blood test area and performance monitors printed on a portion of the test strip underlying another of said openings, a hinged cover adapted to overlie a portion of the panel and cover said openings and locking means thereon to lock the cover in a closed position.
Specification