慢性肾上腺皮质功能减退症病者在水负荷之后排泄自由水的能力减退。这一缺陷曾是多年来作为诊断本病水试验的理论基础。然而关于排水能力减低的机制却不清楚。有人认为皮质激素缺乏时,血钠低,血容量不足,因而肾小球过滤率降低。亦有人认为与本 Chronic hypodermic hypoglossal patients have a diminished ability to excrete free water after a water load. This flaw was the theoretical basis for many years of water testing to diagnose this condition. However, the mechanism for reducing drainage capacity is unclear. Some people think that lack of corticosteroids, hyponatremia, hypovolemia, glomerular filtration rate thus reduced. Some people think that with this