静脉血糖和指尖血糖,为啥不一致?哪一个更可信?

2018-11-10 佚名 中华检验医学网

患上糖尿病,监测血糖是重要的一环。糖尿病患者天天在家用血糖仪测血糖,空腹血糖都是5.8mmol/L,餐后两小时血糖8.0mmol/L,一直觉得自己控制的很好。但是去医院体检的时候查血糖,发现空腹静脉血血糖是7.9mmol/L,餐后两小时静脉血血糖10.1mmol/L。

患上糖尿病,监测血糖是重要的一环。糖尿病患者天天在家用血糖仪测血糖,空腹血糖都是5.8mmol/L,餐后两小时血糖8.0mmol/L,一直觉得自己控制的很好。但是去医院体检的时候查血糖,发现空腹静脉血血糖是7.9mmol/L,餐后两小时静脉血血糖10.1mmol/L。

糖尿病患者自己测的血糖一点都不准吗?为什么两者血糖差距这么大?

这里就有必要说一下糖尿病的诊断标准了,当有糖尿病症状并且随机血糖≥11.1mmol/L或空腹血糖≥7.0mmol/L或口服葡萄糖耐量试验(OGTT)2小时血糖≥11.1mmol/L,即可诊断为糖尿病,这里的血糖都是指静脉血血糖,而不是指尖血糖。

所以,有人小区义诊或是自己在家随机测的空腹稍高,这时候不能自行判断是糖尿病,诊断糖尿病应以静脉血血糖为主。

血糖和静脉血血糖差别

关于指尖血糖和静脉血血糖差别有多大?这是不少糖尿病患者十分关切的问题。

临床上普遍认为进餐后指尖血糖(毛细血管血的血糖)比同一时间的静脉血糖高1~3mmol/L。

静脉血糖与是否及时送检也有关系,如果血糖在室温静置的情况下,因葡萄糖酵解的作用,每过1小时,血糖值就会降低0.5~1.0mmol/L。

所以,血糖仪一定要与静脉血血糖值进行比对,只有测试值在允许误差的范围内才可以使用,选择与其他机器比对,其实这是错误的。建议当血糖仪与静脉血糖值相差±20%,血糖仪可以使用。记住购买的血糖仪一定要注意定期对比,一般1月一次。而不是第一次对比后就终身使用。因为电池电量、试纸保存的温湿度等都有可能影响到血糖仪的使用准确性和稳定性,从而导致所测血糖不准。

指尖血糖检测注意事项

为了减少误差,确保指尖血糖更准确,在使用血糖仪时要注意3点:

第一:保证电池电量充足,如血糖仪许久不使用,应更换电池后再使用,同时要避免用力挤压手指,使组织液汇入血液中而影响测试结果。

第二:试纸的存放温度一般是4~30度,阴凉干燥保存,要避免阳光直射。

第三:测试时保证手指干燥,没有汗液、消毒液和其它残留。

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    2019-03-31 fusion
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    2019-08-27 xue8602
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    2018-11-10 医者仁心5538

    学习了

    0

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    2018-11-10 天地飞扬

    了解一下,谢谢分享!

    0