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Zorluk: Çok zorPhysiological Adaptation

A nurse is caring for an oliguric client diagnosed with an acute kidney injury. The laboratory reports a stat serum potassium level of 8.28.2 mEq/L (8.28.2 mmol/L). The continuous bedside cardiac monitor suddenly displays widening QRS complexes and absent P waves. Arrange the following collaborative interventions in the priority sequence they should be implemented. (Place the most immediate life-saving action first and the final evaluative action last.)

  1. 1Call for the rapid response team while remaining at the client's bedside.
  2. 2Administer intravenous calcium gluconate.
  3. 3Administer intravenous regular insulin concurrently with 50% dextrose.
  4. 4Administer oral sodium polystyrene sulfonate.
  5. 5Obtain a follow-up serum potassium level.

Cevap

The correct sequence prioritizes immediate life safety, followed by myocardial stabilization, intracellular potassium shifting, potassium elimination, and therapeutic evaluation.
The correct sequence is rooted in the physiological principles of resuscitation and prioritization. Activating the emergency response system is the first step for any client facing imminent arrest. Following this, the absolute priority in severe hyperkalemia with ECG changes is preventing ventricular fibrillation; intravenous calcium gluconate achieves this within minutes by raising the threshold potential of the myocardium. Once the heart is protected, intravenous insulin and dextrose are administered to rapidly shift potassium out of the serum and into the cells, temporarily resolving the critical serum concentration. Because the potassium is still in the body, sodium polystyrene sulfonate is then administered to bind potassium in the gut for permanent excretion. Finally, drawing a follow-up serum potassium level evaluates the effectiveness of the entire intervention cascade.

Adım Adım Çözüm

1
Call for the rapid response team while remaining at the client's bedside.
Additional medical personnel and resuscitation equipment are mobilized.
Severe hyperkalemia with widening QRS complexes indicates imminent cardiac arrest; the nurse must secure help without abandoning the unstable client.
2
Administer intravenous calcium gluconate.
The myocardial threshold potential is stabilized.
Calcium acts immediately to antagonize the toxic effects of potassium on the heart, preventing lethal dysrhythmias. It does not lower serum potassium but buys time for other treatments.
3
Administer intravenous regular insulin concurrently with 50% dextrose.
Potassium is forced from the bloodstream into the intracellular space.
This intervention rapidly but temporarily lowers the serum potassium level, reducing the immediate metabolic threat.
4
Administer oral sodium polystyrene sulfonate.
Potassium is bound in the intestines and excreted in the stool.
Because insulin only temporarily shifts potassium, a removal mechanism is required to permanently eliminate the excess total body potassium.
5
Obtain a follow-up serum potassium level.
Current laboratory values are collected.
The final step of the nursing process is evaluation, ensuring the interventions successfully corrected the severe hyperkalemia.

Anahtar Kavram

The emergency management of severe hyperkalemia with ECG changes follows a strict physiological priority: stabilize the myocardium (calcium), shift potassium intracellularly (insulin/dextrose), excrete potassium from the body (cation-exchange resins/dialysis), and evaluate the response.
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Physiological Adaptation

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