Anesthesiology:急性和慢性盐负荷对正常人微血管通透性的影响

2018-02-04 田磊 “罂粟花”微信号

钠引起的微循环改变,尤其是内皮表层的改变,可能在钠介导的血压升高中起着重要作用。然而,急性和慢性钠负荷对人内皮表层和微循环的影响尚未确定。这项研究的目的是将钠引起的血压及体重的变化作为主要评估结果,其他还包括微血管通透性、舌下微循环和健康志愿者尿糖胺聚糖的排泄。

背景与目的:钠引起的微循环改变,尤其是内皮表层的改变,可能在钠介导的血压升高中起着重要作用。然而,急性和慢性钠负荷对人内皮表层和微循环的影响尚未确定。这项研究的目的是将钠引起的血压及体重的变化作为主要评估结果,其他还包括微血管通透性、舌下微循环和健康志愿者尿糖胺聚糖的排泄。

方  法:12名血压正常的男性按随机分为8天低钠饮食(小于50 mmol/天)和高钠饮食(超过200 mmol/天)组。低钠饮食后,30分钟内静脉给予高渗盐水(5毫摩尔钠/升身体水)。高渗生理盐水(含钠5mmol/L)30 min内静脉给药。

结  果:两种干预措施都没有改变血压。钠负荷膳食后体重增加2.5(95%CI,1.7至3.2)kg(P < 0.001),急性静脉钠负荷用量增加了125I-标记的白蛋白的毛细血管漏出率(2.7 [0.1 to 5.3] % cpm · g-1 · h–1; P = 0.04);尽管血浆钠含量和渗透压有类似的增加,慢性钠负荷膳食没有影响125I标记的白蛋白的漏出率(-0.03 [-3.3 to 3.2] % cpm · g-1 · h–1; P = 1.00)。急性静脉钠负荷用量伴随血浆体积显着增加(根据白蛋白的分布量来评估)并显着降低硫酸肝素和硫酸软骨素的尿排出量,这些变化在钠负荷饮食中没有被观察到。

结  论:静脉钠负荷对内皮细胞表层有直接的不良影响,而不影响血压。

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    2018-05-02 zhmscau
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    2018-02-09 智慧医人
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    2018-02-08 jyzxjiangqin

    急慢性盐负荷的危害.

    0

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    2018-02-06 mgqwxj
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    2018-02-06 skhzy

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