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Difficulty: EasyHematology and Oncology

A 52-year-old woman undergoing induction chemotherapy for acute myeloid leukemia presents to the emergency department with chills and a temperature of 39.2°C (102.6°F). Laboratory studies reveal an absolute neutrophil count of 250/mm³. Arrange the following steps for the management of this patient in the most appropriate chronological order.

  1. 1Assess hemodynamic stability and perform a focused physical examination
  2. 2Obtain at least two sets of blood cultures (peripheral and central)
  3. 3Administer empiric broad-spectrum intravenous antibiotics
  4. 4Adjust antimicrobial therapy based on microbiological results

Answer

The correct sequence is: Assess hemodynamic stability -> Obtain blood cultures -> Administer empiric antibiotics -> Adjust antimicrobial therapy based on results.
The standard protocol for neutropenic fever requires rapid but structured intervention. Hemodynamic assessment is always first to ensure the patient is not in imminent shock. Next, blood cultures must be drawn to identify the pathogen. Immediately following the cultures, empiric broad-spectrum antibiotics (such as cefepime or piperacillin-tazobactam) are administered to cover typical pathogens, including Pseudomonas aeruginosa. Finally, once sensitivities are resulted days later, therapy is narrowed or adjusted.

Step-by-Step Solution

1
Identify the clinical syndrome presented in the vignette.
The patient has a fever (39.2°C) and profound neutropenia (ANC < 500/mm³), diagnosing her with neutropenic fever, which is an oncologic emergency.
Recognizing neutropenic fever triggers a well-established, time-sensitive clinical pathway to prevent rapid progression to septic shock.
2
Determine the first priority in emergency management.
Assess hemodynamic stability and perform a focused physical examination.
Regardless of the underlying cause, initial stabilization (ABCs) is always the first step in acute management.
3
Determine the order of diagnostic versus therapeutic interventions.
Obtain blood cultures before administering empiric antibiotics.
Administering antibiotics prior to drawing cultures can sterilize the blood, severely limiting the ability to identify the offending organism and narrow therapy later.
4
Identify the final step in the treatment sequence.
Adjust antimicrobial therapy based on microbiological results.
De-escalation and targeted therapy occur days later once speciation and susceptibility testing are finalized.

Key Concept

Management sequence of neutropenic fever
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Topics

Hematology and Oncology

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