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Zorluk: Çok zorReduction of Risk Potential

A nurse is caring for a 72-year-old client in the intensive care unit, 12 hours post-coronary artery bypass graft (CABG) surgery. The client was extubated 4 hours ago. Over the last hour, the mediastinal chest tube drainage has abruptly decreased from 120 mL/hr to 10 mL/hr. The client's current physiological data are as follows:

- Blood pressure: 86/68 mmHg
- Heart rate: 124 bpm
- Respiratory rate: 26 breaths/min
- Central Venous Pressure (CVP): 15 mmHg (baseline was 6 mmHg)
- Arterial Blood Gas (ABG): pH 7.30, PaCO2PaCO_2 32 mmHg, PaO2PaO_2 82 mmHg, HCO3−HCO_3^- 15 mEq/L
- Assessment: Heart sounds are muffled, and the client is increasingly restless.

Based on the interpretation of this clinical data, which of the following actions should the nurse take FIRST to reduce the risk of severe physiological decompensation?

  1. Prepare the client for an immediate echocardiogram and anticipate an emergency pericardiocentesis.Cevap
  2. B
    Administer a prescribed intravenous sodium bicarbonate bolus to treat the client's uncompensated respiratory acidosis.
  3. C
    Lower the head of the bed and elevate the lower extremities to manage the expected onset of hypovolemic shock.
  4. D
    Document the decreased chest tube drainage as an expected postoperative finding and continue routine hourly monitoring.

Cevap

The correct action is to prepare the client for an immediate echocardiogram and anticipate an emergency pericardiocentesis.
The client is exhibiting classic signs of cardiac tamponade (Beck's triad: hypotension, muffled heart sounds, elevated central venous pressure) combined with a sudden cessation of chest tube drainage. This represents obstructive shock requiring immediate echocardiography to confirm, followed by pericardiocentesis or sternotomy to relieve the pressure.

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1
Analyze the vital signs and physical assessment findings.
The client has a narrowed pulse pressure (86 - 68 = 18 mmHg), tachycardia, an elevated CVP, and muffled heart sounds.
Identifying these specific hemodynamic changes is necessary to recognize Beck's triad, a cardinal indicator of cardiac tamponade.
2
Evaluate the change in chest tube drainage.
Drainage dropped abruptly from 120 mL/hr to 10 mL/hr.
Sudden cessation of drainage after open-heart surgery suggests a clot has formed in the tube, causing blood to accumulate in the pericardial space.
3
Interpret the Arterial Blood Gas (ABG) results.
pH is 7.30 (acidosis), HCO3−HCO_3^- is 15 mEq/L (metabolic cause), and PaCO2PaCO_2 is 32 mmHg (partial respiratory compensation).
This confirms partially compensated metabolic acidosis, likely secondary to poor tissue perfusion (lactic acidosis) from reduced cardiac output.
4
Determine the highest priority intervention to prevent arrest.
Prepare for an emergency echocardiogram and pericardiocentesis.
Cardiac tamponade is an acute obstructive shock that requires immediate mechanical decompression to restore ventricular filling and cardiac output.

Anahtar Kavram

Early recognition and emergency management of cardiac tamponade post-cardiac surgery.
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Konular

Reduction of Risk Potential

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