Practice questions coming soon.

Time's up

Perfusion is the process of delivering oxygenated blood and nutrients to body tissues and organs. Adequate perfusion is necessary for cells to function, organs to remain alive, and the body to maintain homeostasis.

When perfusion is impaired, tissues may not receive enough oxygen and nutrients, leading to dysfunction, injury, or shock.

• Assess heart rate, rhythm, blood pressure, and oxygen saturation.
• Check skin color, temperature, and moisture.
• Assess capillary refill; normal is about less than 3 seconds.
• Check peripheral pulses for presence, strength, and symmetry.
• Assess level of consciousness, restlessness, confusion, and dizziness.
• Monitor urine output; normal is about 30 mL/hr or more in adults.
• Look for edema, chest pain, fatigue, weakness, or signs of poor circulation.

The nurse combines circulation findings, mental status, urine output, skin clues, labs, and vital signs to determine whether tissues are being perfused adequately.

• Low blood pressure + tachycardia may suggest decreased circulating volume or shock.
• Cool, pale skin + delayed capillary refill may suggest poor peripheral perfusion.
• Confusion, restlessness, or decreased LOC may suggest decreased cerebral perfusion.
• Low urine output may suggest decreased kidney perfusion.
• Chest pain, dyspnea, fatigue, and edema may suggest cardiac pump problems affecting perfusion.

Labs and diagnostics that help support the picture:

• Hemoglobin: normal is about 12 to 18 g/dL; low Hgb reduces oxygen-carrying capacity.
• Hematocrit: normal is about 37% to 52%.
• Lactate: normal is about 0.5 to 1 mmol/L; elevated lactate may suggest poor tissue perfusion.
• BUN: normal is about 10 to 20 mg/dL.
• Creatinine: normal is about 0.6 to 1.3 mg/dL; rising values may suggest kidney perfusion problems.
• Troponin: may rise with myocardial injury.
• EKG: helps identify dysrhythmias or cardiac ischemia affecting perfusion.

• Monitor vital signs, pulses, capillary refill, skin findings, and urine output closely.
• Position the client to support circulation and perfusion as appropriate.
• Administer oxygen or fluids as ordered and monitor response.
• Reduce activity demands if perfusion is impaired.
• Report significant changes promptly, especially chest pain, hypotension, or mental status changes.
• Document findings and interventions clearly.

• Assessing peripheral pulses
• Checking capillary refill
• Monitoring intake and output
• Recognizing signs of poor perfusion
• Using focused cardiovascular assessment findings
• Reporting urgent changes clearly and promptly

• A “normal” blood pressure does not always mean perfusion is adequate.
• Mental status changes may be an early clue of poor perfusion.
• Urine output is a major clue to kidney perfusion.
• Students often look at BP only and forget skin, pulses, cap refill, and urine output.
• Poor perfusion can affect every organ system quickly.

Perfusion charts, shock reminders, and cardiovascular assessment materials coming soon.