Method for urine sample analysis, reagent for urine sample analysis, and reagent kit for urine sample analysis

A method for analyzing a urine sample, comprising the steps of:

• staining casts and erythrocytes in the urine sample with a fluorescent dye by mixing the urine sample with a first reagent containing the fluorescent dye, the fluorescent dye being at least one selected from the group consisting of 3,3′-diethyloxacarbocyanine iodide (DiOC2(3)), 3,3-dipropyloxacarbocyanine iodide (DiOC3(3)), 3,3′-dibutyloxacyanine iodide (DiOC4(3)) and 3,3-dipentyloxacarbocyanine iodide (DiOC5(3)),
• dispersing aggregates of impurities in the urine sample with dodecyltrimethylammonium bromide by mixing a mixture of the urine sample and the first reagent with a second reagent containing dodecyltrimethylammonium bromide and obtaining a measurement sample,
• obtaining scattered light information and fluorescence information by irradiating urinary particles contained in the measurement sample with light, and
• detecting at least the casts and the erythrocytes as the urinary particles in the measurement sample based on the obtained scattered light information and fluorescence information.