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Zorluk: Çok zorPhysiological Adaptation

An emergency department nurse is caring for an older adult client who presents with profound lethargy and confusion. The client has a known medical history of heart failure with a severely reduced ejection fraction. The client's family reports a three-day history of dysuria, chills, and fever prior to admission.

Current vital signs:
- Blood pressure: 76/48 mm Hg (MAP 57 mm Hg)
- Heart rate: 134 bpm
- Respiratory rate: 32 breaths/min
- Temperature: 39.2 °C (102.6 °F)
- Oxygen saturation: 88% on 4 L/min via nasal cannula

Physical assessment reveals prominent jugular venous distention at a 45-degree angle, cool and mottled extremities, and coarse crackles auscultated bilaterally up to the mid-lung fields.

Arterial Blood Gas (ABG) and laboratory results:
ParameterValue
pH7.25
PaCO228 mm Hg
PaO258 mm Hg
HCO3-12 mEq/L
Lactate6.1 mmol/L

Based on the client's clinical presentation and laboratory data, which of the following prescribed interventions is the highest priority for the nurse to implement?

  1. Initiate a prescribed norepinephrine infusion to restore mean arterial pressure and tissue perfusion.Cevap
  2. B
    Administer a prescribed 500 mL intravenous fluid bolus to increase circulatory volume and clear the lactate.
  3. C
    Prepare for immediate endotracheal intubation and mechanical ventilation to resolve the respiratory acidosis.
  4. D
    Administer a prescribed dose of intravenous furosemide to reduce preload and clear the pulmonary edema.

Cevap

Initiate a prescribed norepinephrine infusion to restore mean arterial pressure and tissue perfusion.
The client is experiencing septic shock complicated by severe left- and right-sided heart failure, evidenced by the dangerously low mean arterial pressure (MAP of 57 mm Hg), elevated lactate (6.1 mmol/L), jugular venous distention, and pulmonary edema (crackles). While the standard initial treatment for septic shock is large-volume intravenous fluid resuscitation, this is strictly contraindicated when there are clear clinical signs of profound fluid overload and cardiogenic failure. Administering fluids would worsen the pulmonary edema and respiratory failure. Furthermore, although the client has pulmonary edema, administering a diuretic like furosemide is contraindicated because it would further decrease the already critically low preload and cardiac output, exacerbating the shock state. Therefore, the most immediate priority is to initiate a vasopressor (norepinephrine) to restore systemic vascular resistance and maintain organ perfusion (MAP > 65 mm Hg) without adding volume that the failing heart cannot pump.

Adım Adım Çözüm

1
Analyze the vital signs and physical assessment to determine the client's hemodynamic stability.
The MAP is 57 mm Hg (normal > 65), indicating severe hypoperfusion (shock). Concurrently, JVD and bilateral crackles in a client with a history of heart failure indicate severe fluid overload and pump failure.
Identifying the simultaneous presence of septic shock and acute cardiogenic decompensation is required to avoid harmful standard interventions.
2
Interpret the ABG and laboratory results.
pH is 7.25 (acidosis), HCO3- is 12 mEq/L (metabolic), and PaCO2 is 28 mm Hg (respiratory alkalosis compensation). This is metabolic acidosis with partial respiratory compensation, driven by severe lactic acidosis (lactate 6.1 mmol/L) due to tissue hypoxia.
Accurate ABG interpretation prevents treating the wrong acid-base imbalance (e.g., mistakenly assuming respiratory acidosis due to crackles and hypoxia).
3
Evaluate standard treatment protocols against the specific client presentation to prioritize the first intervention.
Standard sepsis protocol demands fluid boluses. However, signs of acute decompensated heart failure (JVD, crackles) make fluid administration life-threatening. Diuretics are also unsafe due to profound hypotension. Vasopressors (norepinephrine) must be prioritized.
Vasopressors will safely restore systemic vascular resistance and maintain organ perfusion (MAP > 65 mm Hg) without adding volume that the failing heart cannot pump.

Anahtar Kavram

Prioritizing hemodynamic support using vasopressors in complex shock scenarios when standard fluid resuscitation is contraindicated due to severe heart failure.
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