Control or calibration standard for use with instruments for optical measurement of hemoglobin concentration in blood samples

US6174728A · kind A · utility

Assignee

• AVL Medical Instruments · CH

Inventors

• Daniel Ben-David · Shrub Oak, US
• Charles L. Laughinghouse · Stone Mountain, US
• James Kenneth Tusa · Roswell, US
• Werner Ziegler · Graz, AT
• Herbert Kroneis · Graz, AT
• Ewald Jobstl · Graz, AT

Key dates

• Filing date: Apr 3, 1998
• Grant date: Jan 16, 2001
• Expiry date: Apr 3, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T436/108331
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A control or calibration standard for use with instruments for the optical measurement of the hemoglobin content in blood samples, features scattering particles or beads dispersed in aqueous electrolyte solution. To prevent sedimentation of the beads during storage, they have a mean diameter of <0.6 .mu.m, preferably about 0.3 .mu.m, and a volume concentration of <1%, preferably <0.3%. To prevent long term agglomeration, a non-ionic surfactant with an added antioxidant can be included in the formulation.