Impaired glucosetolerance (IGT) means that blood glucose during the oralglucosetolerance test is higher than normal but not high enough for a diagnosis of diabetes.
糖耐量受损（IGT）是指，在口服糖耐受量试剂时血糖高于正常，但还未达到糖尿病的诊断标准。
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Objective: to investigate the safety and superiority of blood drawing through an indwelling vein needle on in oralglucosetolerance test.