Examkin

Question

Difficulty: Very hardSurgical and Procedural Interventions

A 62-year-old woman is brought to the emergency department due to a 4-hour history of severe, sudden-onset, diffuse abdominal pain. Her medical history is significant for heart failure with preserved ejection fraction, atrial fibrillation, and a mechanical mitral valve replacement for which she takes daily warfarin. On physical examination, the patient appears agitated and diaphoretic. Her abdomen is rigidly distended with diffuse rebound tenderness and involuntary guarding.

Vital signs are:
Blood pressure: 82/50 mm Hg
Heart rate: 125/min and irregularly irregular
Respiratory rate: 24/min
Temperature: 38.7°C (101.7°F)

Laboratory studies reveal:
Leukocyte count: 18,200/mm³
Hemoglobin: 11.4 g/dL
Platelet count: 155,000/mm³
Creatinine: 1.6 mg/dL
Lactate: 5.2 mmol/L
INR: 3.4

An upright chest radiograph reveals free subdiaphragmatic radiolucency. The surgical team is consulted.

Which of the following are mandatory components of the immediate management plan for this patient? (Select all that apply)

  1. Administration of 4-factor prothrombin complex concentrate and intravenous vitamin KAnswer
  2. Immediate transfer to the operating room for exploratory laparotomyAnswer
  3. C
    Initiation of an intravenous unfractionated heparin infusion for mechanical valve bridging
  4. D
    Postponement of surgical intervention until a repeat INR is confirmed to be less than 1.5
  5. E
    Computed tomography of the abdomen and pelvis to localize the anatomical source of perforation

Answer

The correct mandatory components of the immediate management plan are the administration of 4-factor prothrombin complex concentrate with intravenous vitamin K, and immediate transfer to the operating room for exploratory laparotomy.
The correct management involves both rapid reversal of anticoagulation and immediate surgical source control. The patient is in septic shock due to a perforated viscus, as evidenced by peritonitis and pneumoperitoneum. Because she has an elevated INR of 3.4 from warfarin, there is a severe risk of catastrophic intraoperative hemorrhage. Therefore, immediate administration of 4-factor prothrombin complex concentrate (PCC) and intravenous vitamin K is mandatory to rapidly replenish clotting factors. Simultaneously, transfer to the operating room for an exploratory laparotomy must occur without delay to achieve source control.

Step-by-Step Solution

1
Identify the primary clinical emergency.
The patient has a perforated hollow viscus with septic shock, indicated by the rigid abdomen, fever, hypotension, elevated lactate, and free air on the upright chest radiograph.
Recognizing the life-threatening nature of generalized peritonitis with shock establishes the absolute need for emergent surgical source control.
2
Evaluate absolute contraindications or severe surgical risks.
The patient is on warfarin for a mechanical mitral valve and has a supratherapeutic INR of 3.4.
Operating on a patient with profound therapeutic anticoagulation poses an extreme risk of fatal intraoperative exsanguination.
3
Determine the optimal strategy for managing the surgical and hematologic emergencies concurrently.
Order an emergent exploratory laparotomy while simultaneously administering 4-factor prothrombin complex concentrate (PCC) and intravenous vitamin K.
PCC provides rapid, immediate reversal of vitamin K-dependent clotting factors, allowing life-saving surgery to proceed without catastrophic bleeding. Delaying surgery for laboratory values to normalize is fatal.

Key Concept

Patients presenting with an absolute surgical emergency (e.g., perforated viscus with septic shock) while therapeutically anticoagulated require immediate pharmacologic reversal (using PCC and vitamin K) concurrently with emergent surgical intervention; life-saving operations should not be delayed for advanced imaging or for laboratory normalization of coagulation.
Estimated Time:1m 30s
Rate this question

Topics

Surgical and Procedural Interventions

More questions from this topic