Method for preventing blood denaturation and blood test tool to be used therein
US6379318B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2001 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | May 11, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2496/05
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A blood test tool with which blood in a dried state can be held without denaturation. In the blood test tool wherein a card made of filter paper is impregnated with the blood and then the blood is held in a dried state, a carboxylic acid such as citric acid is added to the part for holding blood. Thus, the carboxylic acid exerts an effect of preventing the blood in the dried state from denaturation. It is preferable to add a non-reducing sugar (sucrose, etc.), an anticoagulant (EDTA, etc.) and an antioxidant (glutathione, etc.) together with the carboxylic acid. This blood test tool can be produced by impregnating a filter paper card with a solution containing citric acid, etc. dissolved therein and then air-drying.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.