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Soru

Zorluk: ZorPharmacologic Interventions

A 28-year-old woman is brought to the emergency department after being stung by a bee while hiking. She is profusely sweating and reports difficulty breathing along with a feeling of impending doom. On physical examination, she has diffuse coalescing urticaria, marked facial angioedema, and audible biphasic wheezing. Her blood pressure is 78/4078/40 mmHg, heart rate is 135135/min, and oxygen saturation is 88%88\% on room air. Large-bore intravenous access is rapidly established.

Assuming her hemodynamic instability and symptoms persist despite each successive intervention, arrange the following pharmacologic therapies in the correct sequential order of administration according to anaphylaxis resuscitation guidelines.

  1. 1Administer intramuscular epinephrine
  2. 2Administer rapid intravenous normal saline bolus
  3. 3Initiate intravenous epinephrine continuous infusion
  4. 4Administer intravenous methylprednisolone

Cevap

The correct sequence prioritizes immediate life-saving interventions over delayed adjunctive therapies: first, administer intramuscular epinephrine; second, provide a rapid intravenous normal saline bolus; third, initiate an intravenous epinephrine continuous infusion; and finally, administer intravenous methylprednisolone.
The correct sequence follows the standard critical care algorithm for anaphylaxis: absolute priority is given to reversing immediate life-threats with intramuscular epinephrine, followed by aggressive fluid resuscitation for distributive shock. Escalation to an intravenous vasopressor drip is reserved for refractory shock, and adjunctive medications with delayed onsets of action (like corticosteroids) are administered last, ensuring acute resuscitation is not delayed.

Adım Adım Çözüm

1
Recognize the clinical presentation of anaphylactic shock.
The patient has severe anaphylaxis with airway compromise and distributive shock.
Immediate recognition is required to initiate a tiered, time-sensitive resuscitation protocol.
2
Administer the definitive first-line therapy.
Intramuscular epinephrine is administered into the anterolateral thigh.
Epinephrine is the only medication that prevents death in anaphylaxis by reversing airway edema and cardiovascular collapse. It must precede all other treatments.
3
Address persistent distributive shock.
A rapid intravenous normal saline bolus is given.
Anaphylaxis causes profound third-spacing and vasodilation. Massive fluid resuscitation is necessary when intramuscular epinephrine alone fails to restore blood pressure.
4
Manage refractory cardiovascular collapse.
An intravenous epinephrine continuous infusion is initiated.
When adequate volume loading and repeated intramuscular epinephrine doses fail, an intravenous vasopressor infusion is required to maintain organ perfusion.
5
Provide adjunctive medical therapy.
Intravenous methylprednisolone is administered.
Glucocorticoids help mitigate prolonged or biphasic anaphylactic reactions. Due to their delayed onset (hours), they must only be given after the patient is hemodynamically stabilized.

Anahtar Kavram

Prioritization of hemodynamic stabilization in refractory anaphylaxis
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Konular

Pharmacologic Interventions

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