A patient with a recently placed central venous catheter develops chest pain and dyspnea with hypotension. Which complication is most likely?

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Multiple Choice

A patient with a recently placed central venous catheter develops chest pain and dyspnea with hypotension. Which complication is most likely?

Air embolism from a central venous catheter is the scenario that best fits this acute picture. When air enters the venous system around a central line, it can travel to the right heart and then into the pulmonary circulation, causing sudden chest pain, shortness of breath, and hypotension from obstructed pulmonary blood flow and reduced preload. The rapid onset of respiratory and hemodynamic compromise after catheter manipulation or placement is a classic clue that air has entered the circulation. Context helps: air embolism can occur during insertion, removal, or when the line is not properly managed, especially with large-bore catheters or when the patient isn’t positioned optimally. Signs can range from mild hypoxia to hemodynamic collapse, and a characteristic but not always present mill-wheel murmur may be heard. Management aims to prevent further air entry and to trap or remove the air while supporting circulation: place the patient in left lateral decubitus and Trendelenburg to try to keep air in the right atrium, clamp or remove the catheter promptly if safe, administer 100% oxygen to help nitrogen washout, and provide hemodynamic support with fluids or vasopressors as needed. If available, ultrasound or echocardiography can help assess the air. Why the others don’t fit as well: catheter migration would more likely cause problems with catheter function or flow rather than an acute pulmonary event with chest pain and hypotension. Phlebitis presents with localized vein inflammation—pain, redness, and warmth along the vein—without the sudden systemic decompensation. Catheter occlusion produces poor venous drainage or failure to deliver therapy, not an abrupt cardiopulmonary collapse.

Air embolism from a central venous catheter is the scenario that best fits this acute picture. When air enters the venous system around a central line, it can travel to the right heart and then into the pulmonary circulation, causing sudden chest pain, shortness of breath, and hypotension from obstructed pulmonary blood flow and reduced preload. The rapid onset of respiratory and hemodynamic compromise after catheter manipulation or placement is a classic clue that air has entered the circulation.

Context helps: air embolism can occur during insertion, removal, or when the line is not properly managed, especially with large-bore catheters or when the patient isn’t positioned optimally. Signs can range from mild hypoxia to hemodynamic collapse, and a characteristic but not always present mill-wheel murmur may be heard.

Management aims to prevent further air entry and to trap or remove the air while supporting circulation: place the patient in left lateral decubitus and Trendelenburg to try to keep air in the right atrium, clamp or remove the catheter promptly if safe, administer 100% oxygen to help nitrogen washout, and provide hemodynamic support with fluids or vasopressors as needed. If available, ultrasound or echocardiography can help assess the air.

Why the others don’t fit as well: catheter migration would more likely cause problems with catheter function or flow rather than an acute pulmonary event with chest pain and hypotension. Phlebitis presents with localized vein inflammation—pain, redness, and warmth along the vein—without the sudden systemic decompensation. Catheter occlusion produces poor venous drainage or failure to deliver therapy, not an abrupt cardiopulmonary collapse.

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