Dehydration, also called hypohydration, refers to the loss of water to below optimum levels in the body. When this occurs, the body processes are disrupted and illnesses may start to manifest.

Pathophysiology of Dehydration

Under normal circumstances, body water is usually lost through the kidneys, skin, lungs and gastrointestinal tract, hence it needs to be replaced.

In dehydration, the amount of water lost by the body exceeds the amount an individual takes in. Dehydration can occur in the following forms;

Excess salivation, severe wounds, gastrointestinal suction, long term nil-by-mouth status, decreased sensation of thirst, limited movement to aid in acquiring more body fluid, altered mental status, comatose state, GI fistulas, intra-abdominal losses (peritonitis and ascites) and sever skin diseases.

Clinical Manifestation

Almost all the body systems are affected by dehydration including cardiovascular, renal and integumentary systems, with the integumentary system presenting with more prominent signs and symptoms.

Cardiovascular Changes

Respiratory Changes

Skin Changes

Neurologic Changes

Kidney Changes

Nursing Management

The main goals of the nursing management of dehydration are to identify the cause(s) of the fluid loss and to reverse it (them).

Assessment

Nursing Interventions

The nursing interventions will be determined by whether the dehydration is mild moderate or severe.

Encourage fluid intake. Those who engage in more aggressive physical activities, live in arid areas or high altitudes should increase more fluid intake. Avoid rehydrating with fluids that precipitate further loss such as alcohol and caffeinated drinks.

Occurs more often in patients who cannot take in fluids without help, such as bedridden and older patients.

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