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1 血糖测定 常用氧化酶法,其正常值为3.89～6.1mmol/L,从人体抽取血液后,在1 h内完成,测其血糖最可靠。测血糖时标本不能放置过久,否则结果明显降低,不能反映体内血糖的实际含量。 2 尿糖测定 当血糖浓度<8.9 mmol/L时,肾小管细咆几乎可把尿中葡萄糖全部吸收,正常人尿中含糖甚少,尿检为阴性。当血糖浓度>肾阀或肾小管重吸收葡萄糖能力降低时,而尿糖为阳性。 3 糖耐量试验 糖耐量试验影响因素很多,灵敏度、特异性都很难确定,故临床使用受到一定限制。目前临床上对于空腹血糖正常或偏高而偶有糖的病人,常用耐量试验来诊断有无异常现象,同时有助于某些激素有关的疾病和某些肝病的诊断。
1 blood glucose test commonly used oxidase method, the normal value of 3.89 ~ 6.1mmol / L, after drawing blood from the human body, completed within 1 h, measuring the blood glucose is the most reliable. When measuring blood glucose specimens can not be placed too long, otherwise the result was significantly reduced, can not reflect the actual content of blood glucose in the body. 2 Determination of urinary glucose When the blood glucose concentration <8.9 mmol / L, almost all of the fine tubules of the renal tubular glucose can be absorbed in the urine, normal urine little sugar, urine test was negative. When the glucose concentration> renal or tubular reabsorption of glucose decreased, while the urine is positive. 3 glucose tolerance test glucose tolerance test a lot of factors, sensitivity, specificity are difficult to determine, so the clinical use of certain restrictions. Clinically, fasting blood glucose in patients with normal or high occasional sugar, commonly used tolerance test to diagnose whether anomalies, while contributing to the diagnosis of certain hormone-related diseases and some liver diseases.