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Difficulty: Very hardPhysiological Adaptation

Following an extensive bowel resection with anastomosis, a client is recovering in the surgical step-down unit while receiving a continuous epidural infusion for analgesia. The client currently rates their pain as 2 out of 10 but exhibits increasing restlessness and anxiety. Current assessment findings include:

- Heart rate: 118 beats/minute
- Blood pressure: 106/82 mm Hg (preoperative baseline 128/78 mm Hg)
- Respiratory rate: 26 breaths/minute
- Arterial blood gases: pH 7.48, PaCO2PaCO_2 30 mm Hg, HCO3−HCO_3^- 23 mEq/L, PaO2PaO_2 85 mm Hg

Based on these clinical indicators, which action should the nurse take first?

  1. Initiate a rapid infusion of isotonic intravenous fluids and immediately notify the surgical team.Answer
  2. B
    Pause the epidural infusion and place the client in a modified Trendelenburg position.
  3. C
    Instruct the client to breathe slowly into a paper bag to correct the acid-base imbalance.
  4. D
    Administer the prescribed as-needed intravenous anxiolytic to manage the acute restlessness.

Answer

Initiate a rapid infusion of isotonic intravenous fluids and immediately notify the surgical team.
The clinical picture demonstrates early compensatory hypovolemic shock, likely secondary to internal hemorrhage from the recent bowel anastomosis. The defining feature is the significantly narrowed pulse pressure (24 mm Hg), which occurs as the sympathetic nervous system causes systemic vasoconstriction to maintain central perfusion. This is accompanied by tachycardia, restlessness from early cerebral hypoxia, and a compensatory respiratory alkalosis due to tachypnea. Immediate isotonic fluid resuscitation and surgical notification are the most critical interventions to prevent irreversible physiological decompensation.

Step-by-Step Solution

1
Analyze the vital signs and compare them to the preoperative baseline.
The client is tachycardic (118 bpm) and tachypneic (26 breaths/min). The blood pressure shows a significantly narrowed pulse pressure (106−82=24106 - 82 = 24 mm Hg, compared to the baseline of 128−78=50128 - 78 = 50 mm Hg).
Identifying subtle trends in vital signs, particularly a narrowing pulse pressure, is crucial for distinguishing different etiologies of shock.
2
Interpret the arterial blood gas (ABG) results.
The pH is alkalotic (7.48), PaCO2PaCO_2 is low (30 mm Hg), and HCO3−HCO_3^- is normal (23 mEq/L), indicating uncompensated respiratory alkalosis.
ABG interpretation helps determine if the client is experiencing a primary respiratory issue or a systemic compensatory response.
3
Synthesize the clinical findings to identify the underlying physiological process.
Restlessness, tachycardia, tachypnea leading to respiratory alkalosis, and a narrowed pulse pressure collectively indicate early compensatory hypovolemic (hemorrhagic) shock rather than epidural-induced distributive shock.
In early hemorrhage, the sympathetic nervous system causes systemic vasoconstriction to maintain perfusion, which raises the diastolic pressure and narrows the pulse pressure.
4
Determine the highest priority nursing intervention.
The primary issue is a severe circulatory deficit (ABCs). The immediate action must be to restore intravascular volume with isotonic fluids and escalate care to the surgical team.
Prioritization must focus on addressing the root cause of the life-threatening circulatory collapse rather than treating secondary symptoms like anxiety or hyperventilation.

Key Concept

Early Recognition of Compensatory Hypovolemic Shock
Estimated Time:2m 0s
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Topics

Physiological Adaptation

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