Patent ID: 8158058

Claim:
An automatic analyzer comprising: a plurality of reagent disks that stores a plurality of reagent containers; a plurality of reagent probes that dispenses a reagent from a reagent container stored in the reagent disks; a supplementary reagent storage that stores a plurality of reagent containers; a rail and reagent holding mechanism that transfers a reagent container selected from among the reagent containers stored in the supplementary reagent storage to the reagent disks; and a control computer configured to: (a) check the mounted positions, lot numbers, expiration dates, and remaining reagent amounts of the reagent in the reagent containers mounted on the plurality of reagent disks; (b) detect whether there is at least one vacant position in the reagent disks where no reagent container resides; (c) transfer a reagent container meeting a highest priority condition to the detected vacant position in the reagents disks using the rail and reagent holding mechanism; and (d) transfer a reagent container meeting the next highest priority condition, to a detected next vacant position using the rail and reagent holding mechanism, and repeating this step (d), wherein the controller determines the highest priority condition where the reagent container is preferentially transferred to one of the reagent disks based on the highest priority condition (i) to lowest priority condition (iv): (i) a first priority condition where the reagent in the supplementary storage reagent is determined to be indispensable to analysis, and, if more than one reagent container on the supplementary reagent storage meets the first priority condition proceed to item (ii), (ii) a second priority condition wherein the reagent container storing the reagent is selected based where supplementary storage reagent container has the same lot number or used for analyzing the same analysis item as the reagent container mounted on the plurality of reagent disks, and if more than one reagent container on the supplementary reagent storage meets the second priority condition proceed to item (iii), (iii) a third priority condition wherein the reagent container storing the reagent is selected based on the of a number of tests for which the reagent can be used in analysis, and if more than one reagent container on the supplementary reagent storage meets the third priority condition proceed to item (iv), and (iv) a fourth priority condition wherein the reagent container storing the reagent is selected based on an expiration date of the reagent when the reagent can be used in analysis.