Composition for venipuncture

Details Composition for venipuncture Composition for venipuncture

A - Human Necessities

61

B

31/105

A61B 10/00 (2006.01)

Patent

CA 1131007

ABSTRACT OF THE DISCLOSURE A composition of matter having thermal color respon- sive characteristics and adapted for exhibiting improved color contrast includes an enantiotropic cholesteric liquid crystall- ine phase material, and at least two oil-soluble dyes dissolved in the material in a total dye concentration of 0.01-1% by weight of the composition, each of the dyes reflecting light of a different wave length in the range of 400 to 700 nanometers, and said dyes together absorbing light of substantially all wave lengths within said range. A method of effecting venapuncture in the human body is also disclosed.

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