If an air detector alarm is triggered with foam in the venous line, which action is appropriate?

If an air detector alarm is triggered with foam in the venous line, which action is appropriate?

• A. Stop the blood pump
• B. Clamp the arterial line
• C. Increase the dialysate flow
• D. Clamp the venous line

Answer: (D)

When an air detector alarm sounds and there’s foam in the venous line, the immediate priority is to prevent air from reaching the patient. Clamping the venous line isolates the patient from the air-containing circuit, stopping the dangerous flow of air back toward the patient. After clamping, you can inspect and purge the venous line to remove the air and re-prime the circuit before resuming dialysis. Increasing dialysate flow won’t address the air, and clamping the arterial line wouldn’t stop air already in the return path.

When an air detector alarm sounds and there’s foam in the venous line, the immediate priority is to prevent air from reaching the patient. Clamping the venous line isolates the patient from the air-containing circuit, stopping the dangerous flow of air back toward the patient. After clamping, you can inspect and purge the venous line to remove the air and re-prime the circuit before resuming dialysis. Increasing dialysate flow won’t address the air, and clamping the arterial line wouldn’t stop air already in the return path.