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changes in the water-retaining properties of the tissues themselves. Raised hydrostatic pressure often reflects retention of water and sodium by the kidneys. [25] Generation of interstitial fluid is regulated by the forces of the Starling equation. [26] Hydrostatic pressure within blood vessels tends to cause water to filter out into the tissue.
A fluid or water deprivation test is a medical test [1] which can be used to determine whether the patient has diabetes insipidus as opposed to other causes of polydipsia (a condition of excessive thirst that causes an excessive intake of water). The patient is required, for a prolonged period, to forgo intake of water completely, to determine ...
Water retention may also be a symptom of hypothyroidism. Medications. Certain medications can cause or worsen water retention. These include oral contraceptives, non-steroidal anti-inflammatory ...
Water retention can refer to: Water retention (medicine), an abnormal accumulation of fluid in the circulatory system or within the tissues or cavities of the body Edema, an abnormal accumulation of fluid beneath the skin, or in one or more cavities of the body; Premenstrual water retention, a common phenomenon associated with the menstrual cycle
Free water clearance can be used as an indicator of how the body is regulating water. A free water clearance of zero means the kidney is producing urine isosmotic with respect to the plasma. Values greater than zero imply that the kidney is producing dilute urine through the excretion of solute-free water.
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Osmotic diuresis is the increase of urination rate caused by the presence of certain substances in the proximal tubule (PCT) of the kidneys. [2] The excretion occurs when substances such as glucose enter the kidney tubules and cannot be reabsorbed (due to a pathological state or the normal nature of the substance).
Fluid volume excess in the intravascular compartment occurs due to an increase in total body sodium content and a consequent increase in extracellular body water. The mechanism usually stems from compromised regulatory mechanisms for sodium handling as seen in congestive heart failure (CHF), kidney failure , and liver failure .