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Difficulty: HardPhysiological Adaptation

A nurse is caring for a client admitted 6 hours ago with fractures of the left 7th, 8th, and 9th ribs following a motor vehicle crash. The client's admission vital signs were blood pressure 132/74 mmHg, heart rate 78 beats/min, and respiratory rate 16 breaths/min. Which current assessment finding is the highest priority for the nurse to report to the healthcare provider?

  1. A
    Arterial blood gas results showing pH 7.33, PaCO 2_2 47 mmHg, and HCO 3−_3^- 24 mEq/L
  2. B
    Diminished breath sounds auscultated over the left lower lung lobe
  3. Blood pressure 114/86 mmHg and heart rate 96 beats/minAnswer
  4. D
    Client reports sharp chest pain rated 7 out of 10 that worsens with deep inspiration

Answer

The vital sign changes demonstrating a narrowing pulse pressure (from 58 mmHg to 28 mmHg) and increasing heart rate.
The left 7th, 8th, and 9th ribs protect the spleen. Fractures in this area put the client at high risk for splenic rupture and internal hemorrhage. In the early (compensatory) stage of hypovolemic shock, sympathetic nervous system activation causes peripheral vasoconstriction, which raises the diastolic blood pressure, while decreased stroke volume lowers the systolic blood pressure. This results in a narrowed pulse pressure (from a baseline of 58 mmHg down to 28 mmHg). A narrowing pulse pressure accompanied by a rising heart rate is a subtle but critical early indicator of hemorrhagic shock, requiring immediate intervention before frank hypotension develops.

Step-by-Step Solution

1
Analyze the client's risk factors based on the mechanism of injury.
Fractures of the lower left ribs (7th through 9th) place the client at high risk for underlying organ damage, specifically a ruptured spleen and subsequent internal hemorrhage.
The spleen is located in the left upper quadrant and is protected by the lower left rib cage.
2
Evaluate the vital sign trends by comparing current readings to the baseline.
The systolic pressure decreased (132 to 114) while the diastolic pressure increased (74 to 86), narrowing the pulse pressure significantly from 58 mmHg to 28 mmHg. The heart rate also increased from 78 to 96 beats/min.
Identifying trends is essential because isolated vital signs (like a heart rate of 96 or systolic BP of 114) may appear to fall within 'normal' parameters despite active physiological decompensation.
3
Apply physiological concepts of shock to the clinical findings.
The changes indicate sympathetic nervous system compensation for hypovolemia. Decreased stroke volume lowers systolic pressure, while peripheral vasoconstriction raises diastolic pressure.
Early recognition of compensatory shock is required to prevent progression to decompensated shock and cardiovascular collapse.
4
Compare the severity and expectedness of all options to establish priority.
The hemodynamic changes indicate a life-threatening complication, whereas the ABG changes, diminished breath sounds, and pleuritic pain are expected, non-emergent findings associated with rib fractures.
Clinical prioritization requires addressing unexpected, unstable, or life-threatening conditions (ABCs) before expected, localized symptoms.

Key Concept

Recognition of early, compensatory hypovolemic shock (narrowing pulse pressure) following high-risk traumatic injury.
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Topics

Physiological Adaptation

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