Specimen analysis method and specimen analyzer

An immunoassay analyzer used for a diagnosis of dementia and configured to measure a target analyte in a specimen, comprising:

• a measurement device configured to perform measurement on the specimen, the measurement device comprising:
• a sample dispenser configured to dispense the specimen into a number of containers, wherein the number of containers is determined by a number of target analytes requested to measure by a measurement order of a dementia marker issued for the specimen;
• a reagent dispenser configured to dispense an aliquot of reagent into each of the containers to prepare measurement samples, wherein the reagent is prepared in different types that each contain a different labeled antibody bound to a specific target analyte in the measurement sample;
• a light detector configured to detect light excited out from the labeled antibody bound to the target analyte in each of the measurement samples;
• and
• a temperature sensor configured to measure an environmental temperature in the measurement device;
• and
• a controller programmed to control the measurement device to measure the target analytes in the measurement samples requested to measure by the measurement order and obtain measurement values on the measured target analytes based on amounts of lights detected by the light detector,
• wherein the controller is programmed to control the measurement device to:
• prepare a first measurement sample from one specimen to measure a first target analyte and a second measurement sample from said one specimen to measure a second target analyte in response to the measurement order requesting measurement of the first and second target analytes, wherein the first target analyte is a first type of protein, and the second target analyte is a second type of protein;
• and
• perform a first measurement on the first measurement sample to obtain a first measurement value representative of an amount of the first type of protein in the first measurement sample and a second measurement on the second measurement sample to obtain a second measurement value representative of an amount of the second type of protein in the second measurement sample,
• wherein the controller is programmed to calculate an arithmetic relationship between the first measurement value and the second measurement value,
• wherein the controller is further programmed to determine whether the environmental temperature measured by the temperature sensor is within a first temperature range that is an allowable temperature range for the first measurement, the first temperature range being narrower than a second temperature range that is an allowable temperature range for the second measurement,
• wherein the controller is further programmed to control provision of the arithmetic relationship to an operator of the immunoassay analyzer based on a result of the determining whether the environmental temperature is within the first temperature range.