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The first step in physical examination is careful observation of the patient’s overall appearance, because renal disease affects all body systems. Examine the patient’s skin for color, turgor, intactness, and texture; mucous membranes for color, secretions, odor, and intactness; eyes for periorbital edema and vision; general activity for motion, gait, and posture; muscle movement for motor function and general strength; and mental status for level of consciousness, orientation, and response to stimuli. (See Common renal symptoms.)
Renal disease causes distinctive changes in vital signs: hypertension due to fluid and electrolyte imbalances and hyperactivity of the renin-angiotensin system; a strong, fast, irregular pulse due to fluid and electrolyte imbalances; hyperventilation to compensate for metabolic acidosis; and an increased susceptibility to infection due to overall decreased resistance. Palpation and percussion may reveal little because the kidneys and bladder are difficult to palpate unless they are enlarged or distended.
Source: Professional Guide to Diseases (Eighth Edition), 2005
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