Which measure best prevents air in dialysis bloodlines?

• A. Open clamps widely
• B. Increase ultrafiltration
• C. Use saline flush
• D. Tighten all connections

Answer: (D)

Preventing air in dialysis bloodlines comes down to stopping air from entering the circuit in the first place. The best way to do this is by ensuring every connection is securely tightened. When all tubing connections, hubs, and fittings are snug, there’s no gap for air to seep in as blood and dialysate flow, reducing the risk of air embolism.

Opening clamps widely would create openings that can allow air to enter, especially at imperfect joints. Increasing ultrafiltration doesn’t affect air entry into the lines. A saline flush can help clear small air bubbles that are already present, but it doesn’t prevent air from getting in, which is why securing all connections is the most effective preventive measure.