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妊娠期肾功能难以确定。由于输尿管的扩张与膀胱排空困难,尿流不畅。同时在仰卧位置时观察到输尿管阻塞,心脏静脉回流减少,故肾功能减退。妊娠期输尿管的扩张可能持续至产后12周。妊娠期正常肾与病肾均肥大。肾小球滤过率与肾血流量增加25—50％,机理还不清楚。由于肾小球滤过率增加,正常血清肌酐水平则降低。在妊娠期细胞外液体量增加4—6公升,心排出量增加25—50％,血压下降,周围血管阻力减少。正常妊娠约900mEq钠储留(4—5 mEq/天)妊娠期有蛋白尿、糖尿、氨基酸尿与增加尿酸排泄的趋向。
Gestational renal function is difficult to determine. Due to ureteral dilatation and bladder emptying difficulties, poor urinary flow. At the same time in the supine position observed obstruction of the ureter, venous return to reduce venous, so renal dysfunction. Ureteral dilation during pregnancy may last up to 12 weeks postpartum. Normal kidney and kidney during pregnancy are hypertrophy. Glomerular filtration rate and renal blood flow increased by 25-50%, the mechanism is unclear. As the glomerular filtration rate increased, normal serum creatinine levels decreased. In pregnancy extracellular fluid volume increased 4-6 liters, cardiac output increased by 25-50%, blood pressure decreased peripheral vascular resistance decreased. Normal pregnancy about 900mEq sodium retention (4-5 mEq / day) during pregnancy proteinuria, diabetes, amino aciduria and increased uric acid excretion tendency.