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Hyponatremia. Hyponatremia or hyponatraemia is a low concentration of sodium in the blood. [ 4] It is generally defined as a sodium concentration of less than 135 mmol/L (135 mEq/L ), with severe hyponatremia being below 120 mEq/L. [ 3][ 8] Symptoms can be absent, mild or severe. [ 2][ 9] Mild symptoms include a decreased ability to think ...
t. e. Reference ranges (reference intervals) for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples. Reference ranges for blood tests are studied within the field of clinical chemistry (also known as "clinical biochemistry", "chemical pathology" or "pure blood chemistry ...
Hypernatremia, also spelled hypernatraemia, is a high concentration of sodium in the blood. [ 3] Early symptoms may include a strong feeling of thirst, weakness, nausea, and loss of appetite. [ 1] Severe symptoms include confusion, muscle twitching, and bleeding in or around the brain. [ 1][ 2] Normal serum sodium levels are 135–145 mmol/L ...
Electrolyte imbalance. Diagram of ion concentrations and charge across a semi-permeable cellular membrane. Electrolyte imbalance, or water-electrolyte imbalance, is an abnormality in the concentration of electrolytes in the body. Electrolytes play a vital role in maintaining homeostasis in the body. They help to regulate heart and neurological ...
Hypoosmolar hyponatremia is a condition where hyponatremia is associated with a low plasma osmolality. [ 1] The term " hypotonic hyponatremia " is also sometimes used. [ 2] When the plasma osmolarity is low, the extracellular fluid volume status may be in one of three states: low volume, normal volume, or high volume.
This keeps serum sodium concentration - a proxy for solute concentration - at normal levels, prevents hypernatremia and turns off the osmoreceptors. [7] Specifically, when the serum sodium rises above 142 mEq/L, ADH secretion is maximal (and thirst is stimulated as well); when it is below 135 mEq/L, there is no secretion. [8]
Hypervolemia. Hypervolemia, also known as fluid overload, is the medical condition where there is too much fluid in the blood. The opposite condition is hypovolemia, which is too little fluid volume in the blood. Fluid volume excess in the intravascular compartment occurs due to an increase in total body sodium content and a consequent increase ...
Exercise-associated hyponatremia (EAH) is a fluid-electrolyte disorder caused by a decrease in sodium levels (hyponatremia) during or up to 24 hours after prolonged physical activity. [1] This disorder can develop when marathon runners or endurance event athletes drink more fluid, usually water or sports drinks, than their kidneys can excrete. [2]