Urinary System and Fluid Balance

Overview

The urinary system maintains the composition and volume of body fluids by filtering blood and excreting waste. It plays a critical role in blood pressure regulation and red blood cell production. Nursing assessments of the renal system provide insight into overall hemodynamic stability and metabolic health.

Key nursing concepts

• Filtration, reabsorption, and secretion in the nephron.
• Regulation of fluid volume and blood pressure via the RAAS.
• Excretion of metabolic wastes like urea and uric acid.
• Electrolyte balance: sodium, potassium, and phosphorus.
• Acid-base regulation through bicarbonate reabsorption.
• Storage and micturition functions of the bladder.

Important nursing considerations

• Monitor intake and output (I&O) strictly to assess kidney function.
• Check laboratory values for blood urea nitrogen (BUN) and creatinine.
• Assess for signs of urinary tract infection such as frequency or dysuria.
• Palpate the bladder for distention if the patient has not voided.
• Evaluate urine characteristics including color, clarity, and odor.
• Review medication lists for drugs that are cleared by the kidneys.

Patient teaching

• Encourage wiping from front to back to prevent bacterial contamination.
• Explain the importance of completing the full course of antibiotics for UTIs.
• Instruct on adequate fluid intake to prevent kidney stones.
• Teach patients to report changes in urine output or color immediately.

Related practice questions

Real questions from the NursGuru bank, each with the answer and rationale.

1. Practice question 1 →
2. Practice question 2 →
3. Practice question 3 →
4. Practice question 4 →
5. Practice question 5 →

Urinary System and Fluid Balance flashcards

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