Postoperative pulmonary embolism with thrombolysis dilemma — FFICM MCQ

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HardTrauma and Surgical ICUPostoperative pulmonary embolism with thrombolysis dilemmaFFICM

A 64-year-old woman collapses 36 hours after major pelvic surgery. She is intubated, MAP 50 mmHg on noradrenaline and echo shows severe RV dilatation. CT pulmonary angiography confirms saddle pulmonary embolism. The surgical field has high bleeding risk and the hospital has interventional radiology available. What is the most appropriate management?

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Correct answer: E — Discuss catheter-directed or surgical embolectomy pathway urgently

The correct answer is E, discuss catheter-directed or surgical embolectomy pathway urgently. This patient has high-risk (massive) pulmonary embolism with obstructive shock (MAP 50 on noradrenaline, RV dilatation), which mandates emergency reperfusion, but she is 36 hours post major pelvic surgery with a high-bleeding-risk field, making systemic thrombolysis relatively contraindicated. Current guidance used in UK critical care practice states that when systemic thrombolysis is contraindicated or fails, surgical embolectomy or catheter-directed treatment should be pursued depending on local expertise, and interventional radiology is stated to be available here. This reflects the core FICM principle of balancing haemodynamic threat against bleeding risk when selecting a reperfusion strategy. Why the other options are wrong: C. Give full-dose systemic thrombolysis without considering bleeding risk: ignoring a major, recent surgical bleeding risk before thrombolysis risks catastrophic retroperitoneal or pelvic haemorrhage, and bleeding risk must always be weighed even in high-risk PE. A. Treat with prophylactic-dose dalteparin: prophylactic dosing does not treat established PE or reverse obstructive shock; therapeutic anticoagulation alone is also insufficient in haemodynamically unstable PE requiring reperfusion. B. Delay treatment until repeat CT tomorrow: this patient is in obstructive shock with RV failure; any delay risks cardiac arrest, and the diagnosis is already confirmed on CTPA. D. Use diuretics as definitive therapy: diuretics worsen preload-dependent RV failure in acute PE and have no role as definitive therapy for obstructive shock. Key point: In high-risk PE with a contraindication to systemic thrombolysis, urgent discussion of catheter-directed or surgical embolectomy is the guideline-directed reperfusion strategy.

Reference: ESC/ERS 2019 Guidelines for the diagnosis and management of acute pulmonary embolism (European Heart Journal, 2020), section on reperfusion therapy in high-risk PE: https://pmc.ncbi.nlm.nih.gov/articles/PMC7873787/