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[1] [3] Severe symptoms include confusion, seizures, and coma; [1] [2] [9] death can ensue. [10] The causes of hyponatremia are typically classified by a person's body fluid status into low volume, normal volume, or high volume. [4] Low volume hyponatremia can occur from diarrhea, vomiting, diuretics, and sweating. [4]
The low GFR causes a lowered rate of osmole excretion, and an increase in the amount of water reabsorbed; thus, hyponatremia occurs when the amount of water intake exceeds the renal water excretion capacity. [2] Medications, such as thiazides and antidepressants, may exacerbate symptoms of hyponatremia. [2]
In severe or acute hypoosmolar hyponatremia, swelling of brain cells causes various neurological abnormalities, which in severe or acute cases can result in convulsions, coma, and death. The symptoms of chronic syndrome of inappropriate antidiuresis are more vague, and may include cognitive impairment , gait abnormalities , or osteoporosis .
Symptoms of hypernatremia may vary depending on type and how quickly the electrolyte disturbance developed. [27] Common symptoms are dehydration, nausea, vomiting, fatigue, weakness, increased thirst, and excess urination. Patients may be on medications that caused the imbalance such as diuretics or nonsteroidal anti-inflammatory drugs. [27]
Less frequently symptoms associated with the administration of certain pharmaceutical drugs have to be discounted. These drugs promote the retention of liquid in the extremities such as occurs with NSAIDs, some antihypertensive drugs, the adrenal corticosteroids and sex hormones. [41] Acute fluid overload can cause edema in someone with kidney ...
Hyponatremia is the most common electrolyte abnormality during acute attacks, occurring in 40% of patients and presenting as SIADH. [13] Hypomagnesemia is also common. There are no pathognomonic signs or symptoms. [citation needed] The most common identified triggers for acute attacks are medications, weight loss diets, and surgery. [14]
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.
Signs and symptoms of psychogenic polydipsia include: [3] Excessive thirst and xerostomia, leading to overconsumption of water; Hyponatraemia, causing headache, muscular weakness, twitching, confusion, vomiting, irritability etc., although this is only seen in 20–30% of cases.