Agent for enhancing contrast of image of fluorescent staining of lumen of digestive tract
The present invention provides an agent and a method for enhancing a contrast of an image of fluorescent staining of a lumen of the digestive tract with an intravenously administered fluorescent dye, wherein the agent for enhancing a contrast is an agent for a lumen of the digestive tract containing an aqueous solution having a buffer capacity and having a pH of 6 to 10.
1. A method for enhancing a contrast of an image of fluorescent staining of a lumen of the digestive tract with an intravenously administered fluorescent dye, comprising applying an aqueous solution having a buffer capacity and having a pH of 6 to 10 to a lumen of the digestive tract after intravenous administration of the fluorescent dye; and adjusting the pH of the lumen of the digestive tract 6 to 10 when the lumen of the digestive tract is observed fluorescently.
2. The method for enhancing a contrast according to claim 1 , wherein the lumen of the digestive tract is a lumen of the upper digestive tract.
3. The method for enhancing a contrast according to claim 1 , wherein the aqueous solution having a buffer capacity has a pH of 6 to 8.
4. The method for enhancing a contrast according to claim 1 , wherein the fluorescent dye is fluorescein or a salt thereof.