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Test device with novel control symbolism

  • US 5,132,085 A
  • Filed: 02/28/1991
  • Issued: 07/21/1992
  • Est. Priority Date: 02/28/1991
  • Status: Expired due to Fees
First Claim
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1. In a solid phase assay device for use in a binding assay to determine the presence of an analyte in a liquid sample, the device comprising a plurality of reaction surfaces which comprise at least one of positive control area, a negative control area and a patient sample analyte area, wherein at least one of said reaction surfaces have at least two of said areas taken from any two of said positive control, said negative control and said patient sample analyte combined and configured together so that said two areas produce, in the presence of an appropriate analyte, a representational symbol selected from words and pictures that a) are of a predetermined, connected shape b) are informative of the test result and its validity,the improvement wherein said at least two areas configured together are the positive and negative controls on one of said reaction surfaces and said symbol is formed so as to be indicative of either of two exclusive alternatives:

  • that the test device and procedure are operating satisfactorily, or they are not operating satisfactorily,and further wherein said patient sample analyte area is on another of said reaction surfaces and spaced away from said reaction surface of said two control areas, and wherein said two control areas occupy only the approximate center portion of the reaction surface containing them so that they occupy less than the total area of said reaction surface containing them,so that false positives are readily distinguished by the user.

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