Air embolism during haemodialysis.

Area of Science:

• Nephrology
• Medical Engineering
• Patient Safety

Background:

• Air embolism is a serious complication during haemodialysis.
• Episodes can arise from various points in the extracorporeal circuit.
• Existing air detection systems have limitations.

Purpose of the Study:

• To report on the incidence of air embolism in haemodialysis.
• To evaluate emergency treatments for air embolism.
• To propose an improved prevention strategy using a novel bubble trap design.

Main Methods:

• Retrospective analysis of 14,000 haemodialysis procedures.
• Review of emergency treatment protocols and outcomes.
• Description of a new haemodialysis circuit incorporating a floating valve in the bubble trap.

Main Results:

• Seven episodes of air embolism (2 fatal, 5 non-fatal) were recorded.
• Common entry points for air included infusion bottles, heparin lines, and pump inserts.
• Emergency treatments showed some success in managing symptoms.

Conclusions:

• Improved equipment design and integrated air detection are crucial for prevention.
• The proposed floating valve system offers a potentially more reliable method for detecting and trapping air.
• Wider adoption of effective air prevention devices is recommended to enhance patient safety in haemodialysis.