×

Rapid diagnostic method for distinguishing allergies and infections

  • US 5,910,421 A
  • Filed: 03/25/1996
  • Issued: 06/08/1999
  • Est. Priority Date: 12/21/1995
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method for differentiating between allergic rhinitis, upper respiratory tract viral infection and bacterial sinusitis, which comprises measuring a sample of a patient'"'"'s nasal secretion, for pH, protein content, nitrite content, esterase activity and eosinophil counts of the sample, such that a combination of:

  • (a) a pH between about 7.5 and 9, a moderately strong presence of protein, at least a trace of nitrite and esterase, and low or absent eosinophil counts is indicative of bacterial sinusitis;

    (b) a pH between about 5.0 and 7.0, little or no protein, little or no nitrite, little or no esterase activity and moderate to high eosinophil counts is indicative of allergic rhinitis; and

    (c) a pH between about 5.0 and 7.0, little or no protein, at least a trace of nitrite and esterase and low or absent cosinophil counts indicates an upper respiratory tract viral infection.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×