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Difficulty: MediumPreoperative and Postoperative Care

A 64-year-old man is evaluated in the surgical intensive care unit on postoperative day 8 following a pancreaticoduodenectomy. His postoperative course was complicated by delayed gastric emptying, requiring bowel rest and total parenteral nutrition (TPN) via a right internal jugular central venous catheter. Today, he develops sudden chills. His temperature is 39.4°C (102.9°F), blood pressure is 92/58 mm Hg, heart rate is 124/min, and respiratory rate is 22/min. Physical examination reveals mild erythema at the central line insertion site. The surgical drains continue to output a small amount of non-purulent, clear fluid, and his abdomen is soft and non-tender. His leukocyte count has increased from 10,500/mm³ yesterday to 19,500/mm³ today.

Which of the following are the most appropriate initial steps in the evaluation and management of this patient's acute change in condition? (Select exactly two)

  1. Draw paired blood cultures from the central venous catheter and a peripheral veinAnswer
  2. Initiate empiric intravenous broad-spectrum antimicrobial therapyAnswer
  3. C
    Start targeted intravenous ceftriaxone monotherapy
  4. D
    Exchange the existing central venous catheter over a guidewire
  5. E
    Request an urgent computed tomography scan of the abdomen and pelvis

Answer

The most appropriate initial steps are to draw paired blood cultures from the central venous catheter and a peripheral vein, and to initiate empiric intravenous broad-spectrum antimicrobial therapy.
The patient is presenting with signs of septic shock (fever, tachycardia, hypotension) on postoperative day 8. In the setting of total parenteral nutrition (TPN) via an indwelling central venous catheter and erythema at the insertion site, a central line-associated bloodstream infection (CLABSI) is the most likely diagnosis. The initial management of suspected CLABSI requires obtaining paired blood cultures (one from the catheter and one from a peripheral vein) to determine the differential time to positivity. Concurrently, because the patient is hemodynamically unstable, empiric broad-spectrum intravenous antibiotics must be initiated immediately to cover typical hospital-acquired pathogens, including MRSA and Pseudomonas.

Step-by-Step Solution

1
Analyze the patient's presentation and timeline.
The patient is on postoperative day 8 with a central venous catheter receiving TPN. He presents with new-onset high fever, tachycardia, hypotension, leukocytosis, and mild erythema at the line site, without new abdominal signs.
Establishing the postoperative day and recognizing the presence of foreign bodies (such as a central line) helps narrow the differential diagnosis for postoperative fever.
2
Identify the most likely source of infection.
The most likely diagnosis is a central line-associated bloodstream infection (CLABSI) leading to septic shock.
Fever starting after postoperative day 5 in a patient with an indwelling central line, especially one used for TPN, is highly suspicious for CLABSI, particularly when accompanied by localized erythema and hemodynamic instability.
3
Determine the appropriate diagnostic and therapeutic interventions.
The immediate priorities are obtaining appropriate cultures (paired central and peripheral blood cultures) and administering broad-spectrum empiric antibiotics.
In suspected sepsis, identifying the organism and starting early broad-spectrum coverage are critical to reducing mortality. Catheter removal is also indicated for TPN-associated infections.

Key Concept

Patients with central venous catheters (especially those receiving total parenteral nutrition) who develop fever and hemodynamic instability should be evaluated for a central line-associated bloodstream infection (CLABSI). Immediate management includes paired blood cultures and broad-spectrum empiric antibiotics.
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Preoperative and Postoperative Care

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