Vein identification technique
First Claim
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1. A method for identifying a vein in a patient, the method comprising:
- placing a thermochromic ink in direct contact with a venous area on the skin of a patient, wherein the thermochromic ink comprises thermosensitive color-changing microcapsules that contain a proton-accepting chromogen and a desensitizer, wherein the desensitizer possesses a melting point above which the chromogen is capable of becoming protonated, thereby resulting in a color change; and
thereafter, observing the venous area for the color change.
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Abstract
A technique for identifying a vein in a patient is disclosed. The technique involves the application of a thermochromic ink to a venous area on the skin of a patient (e.g., human or animal). The thermochromic ink comprises thermosensitive color-changing microcapsules that contain a proton-accepting chromogen and a desensitizer. The desensitizer possesses a melting point above which the chromogen is capable of becoming protonated, thereby resulting in a color change. Thereafter, the venous area is observed for the color change.
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22 Claims
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1. A method for identifying a vein in a patient, the method comprising:
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placing a thermochromic ink in direct contact with a venous area on the skin of a patient, wherein the thermochromic ink comprises thermosensitive color-changing microcapsules that contain a proton-accepting chromogen and a desensitizer, wherein the desensitizer possesses a melting point above which the chromogen is capable of becoming protonated, thereby resulting in a color change; and thereafter, observing the venous area for the color change. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification