What is an early sign of CO2 embolism during laparoscopy and immediate management?

What is an early sign of CO2 embolism during laparoscopy and immediate management?

• A. Sudden drop in end-tidal CO2 with possible hypotension; halting insufflation, desufflating, and hemodynamic support
• B. Gradual decline in blood pressure with stable end-tidal CO2
• C. No change in vital signs
• D. Changes in color of peritoneum

Answer: (A)

The ability to recognize CO2 embolism hinges on an abrupt change in ventilation–perfusion dynamics. An early sign is a sudden drop in end-tidal CO2, often accompanied by hypotension. This happens because CO2 entering the venous system travels to the lungs, obstructing pulmonary outflow and reducing effective gas exchange, so far less CO2 is exhaled. The drop in ETCO2 is a key clue that something is acutely wrong with circulation and gas entry during laparoscopy.

Immediate management focuses on stopping the source and supporting the patient. Halting the CO2 insufflation stops new gas from entering the venous system. Desufflating the abdomen rapidly reduces intraperitoneal CO2 pressure. After that, provide 100% oxygen and activate hemodynamic support as needed. If available, consider aspirating gas via a central venous catheter to remove intravascular CO2 and closely monitor the patient as you manage the underlying instability.

Other choices don’t fit this picture well: a gradual blood pressure decline with stable ETCO2 points to different problems; no change in vital signs is unlikely with a true embolic event; and changes in color of the peritoneum do not reflect an embolism.