Dehydration

Editor-In-Chief: Prab R Tumpati, MD
Obesity, Sleep & Internal medicine
Founder, WikiMD Wellnesspedia &
W8MD's weight loss doctor NYC
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Dehydration
File:Cholera rehydration nurses.jpg
Synonyms	N/A
Pronounce	N/A
Specialty	N/A
Symptoms	Thirst, dry mouth, dark urine, dizziness, fatigue
Complications	Heat injury, kidney failure, seizures, hypovolemic shock
Onset	Acute or chronic
Duration	Varies
Types	N/A
Causes	Diarrhea, vomiting, excessive sweating, burns, inadequate fluid intake
Risks	Infants, elderly, athletes, people with chronic illnesses
Diagnosis	Physical examination, blood test, urinalysis
Differential diagnosis	Diabetes insipidus, adrenal insufficiency, hypercalcemia
Prevention	Adequate fluid intake, oral rehydration solutions
Treatment	Oral rehydration therapy, intravenous therapy
Medication	N/A
Prognosis	Good with treatment
Frequency	Common
Deaths	N/A

Dehydration is a physiological state that occurs when there is an excessive loss of water from the body. It is a serious and potentially life-threatening condition, especially if not promptly recognized and treated.

Pathophysiology

Under normal circumstances, the human body maintains a delicate balance of water and electrolytes to function optimally. Dehydration upsets this balance, resulting in reduced water content in the body's cells and blood vessels. This situation can have a widespread impact, affecting everything from the skin and mucous membranes to the circulatory system and central nervous system.

Causes

Several factors can lead to dehydration. These include inadequate fluid intake, excessive sweating due to high temperatures or physical exertion, prolonged vomiting or diarrhea, diabetes, excessive alcohol consumption, and certain medications such as diuretics. Conditions that hinder fluid intake, like a sore throat or an intestinal obstruction, can also contribute to dehydration.

Symptoms

Dehydration can manifest through a variety of symptoms. Common signs include excessive thirst, dry mouth and throat, decreased urine output and dark-colored urine, fatigue, dizziness, and confusion. In severe cases, low blood pressure, rapid heart rate, fever, sunken eyes, and in extreme cases, loss of consciousness can occur.

Diagnosis

Diagnosis of dehydration typically involves a thorough clinical examination, focusing on signs such as skin elasticity, the color and volume of urine, and the patient's level of consciousness. Blood tests may be ordered to check electrolyte levels and kidney function, while urinalysis can help identify the concentration of the urine.

Treatment

The primary treatment for dehydration is fluid replacement to restore the body's water and electrolyte balance. This can be achieved through drinking fluids containing electrolytes, or in severe cases, through intravenous fluid administration. It's also crucial to treat the underlying cause of dehydration to prevent recurrence.

Prevention

Prevention of dehydration involves ensuring adequate fluid intake, particularly during hot weather, illness, or periods of high physical activity. Those with chronic illnesses such as diabetes or kidney disease, as well as the elderly and infants, should be especially mindful of hydration, as they are at a higher risk of dehydration.