Arterial blood gas helps assess the patient's acid-base balance, ventilation status, and blood oxygenation status. This is a very important test, especially for critically ill patients.

Potassium (K) is one of the electrolyte components of blood. Normal blood K content is 3.5-5 mEq/L. Hypokalemia causes fatigue, weakness in limbs, muscle pain, cramps, constipation, and can cause complications such as slow heart rate, reduced myocardial contractility or torsades de pointes tachycardia, which is one of the causes of arrhythmia leading to cardiac arrest. Hypokalemia is very dangerous, especially for patients with chronic diseases such as heart failure, obstructive pulmonary disease...

Crush syndrome or rhabdomyolysis was discovered by Bywater and Beal in 1941, after an earthquake in London. During war, natural disasters (earthquakes, landslides, house collapses, fires, etc.) or serious work accidents, etc., a part of the victim's body is crushed and buried for two hours or more. These injuries can lead to crush syndrome.

Dengue fever is a very dangerous and quite common disease in Vietnam, appearing seasonally. If dengue fever is not treated promptly, it will cause many dangerous complications, even life-threatening, including metabolic acidosis, hypoglycemia, calcium and sodium in the blood. These complications often appear when patients have severe dengue fever (also known as dengue hemorrhagic fever). So how to treat these complications?

Metabolic acidosis is a decrease in [HCO3-], reflecting either retention of fixed acids or loss of base. The compensatory response is increased ventilation leading to a decrease in PaCO2.

Appropriate fluid resuscitation improves tissue perfusion and shock. Decreased tissue perfusion due to sepsis is manifested by organ dysfunction and increased blood lactate, which may be accompanied by hypotension.