(Hypo/Hyper)volemia & (Hypo/Hyper)natremia

Hypovolemia

A condition characterized by a decreased volume of blood plasma.

What causes hypovolemia?

Blood loss (hemorrhage), dehydration, excessive sweating, diuretics, and severe burns.

What are the symptoms of hypovolemia?

Dizziness, low blood pressure, increased heart rate, weakness, confusion, and pale skin.

What indicates a hypovolemic state in terms of hematocrit levels?

Typically, a hematocrit greater than 45% in males and greater than 42% in females.

What is the treatment for hypovolemia?

Fluid resuscitation with isotonic solutions (e.g., normal saline), addressing the underlying cause, transfusions if necessary.

Hypervolemia

A condition where there is an excess of blood plasma volume.

What causes hypervolemia?

Heart failure, kidney failure, excessive fluid intake, medications (like corticosteroids), and cirrhosis.

What are the symptoms of hypervolemia?

Swelling (edema), shortness of breath, increased blood pressure, rapid weight gain, and distended neck veins.

What indicates a hypervolemic state in terms of hematocrit levels?

Lower hematocrit levels and elevated central venous pressure (CVP).

What is the treatment for hypervolemia?

Diuretics, fluid restriction, and addressing the underlying medical condition such as adjusting medications.

Hyponatremia

A condition with low sodium levels in the blood (below 135 mEq/L).

What causes hyponatremia?

Excessive fluid intake, kidney problems, certain medications, syndromes causing excessive secretion of antidiuretic hormone (ADH), and heart failure.

What are the symptoms of hyponatremia?

Nausea, headache, confusion, seizures, coma, and muscle cramps.

What indicates hyponatremia in terms of serum sodium levels?

Serum sodium levels below 135 mEq/L, with severe cases manifesting under 120 mEq/L.

What is the treatment for hyponatremia?

Sodium supplementation, fluid restriction, careful monitoring of serum sodium levels, and treating underlying conditions.

Hypernatremia

A condition characterized by high sodium levels in the blood (above 145 mEq/L).

What causes hypernatremia?

Inadequate fluid intake, excessive sweating, diabetes insipidus, high-salt diets, and renal failure.

What are the symptoms of hypernatremia?

Thirst, confusion, muscle twitching, seizures, dry mucous membranes, and lethargy.

What indicates hypernatremia in terms of serum sodium levels?

Serum sodium levels above 145 mEq/L, with a critical level can be above 160 mEq/L.

What is the treatment for hypernatremia?

Gradual hydration with isotonic or hypotonic fluids, addressing the underlying cause, and monitoring serum sodium levels closely to ensure proper correction.