Dialysis Equipment Operation Flashcards

What does the conductivity monitor on a hemodialysis machine measure, and why is it critical?

Answer: Concentration of electrolytes in the dialysate solution

Conductivity measures the total ionic concentration (electrolyte content) of the dialysate, ensuring the correct concentration for safe treatment.

During hemodialysis, the blood pump suddenly stops and the venous pressure alarm activates. What is the most likely cause?

Answer: Clotting in the venous needle or access

A sudden increase in venous pressure with blood pump stoppage typically indicates a clot or obstruction in the venous return pathway.

What is the purpose of the deaeration chamber system in a hemodialysis machine?

Answer: Remove dissolved gases from dialysate before patient contact

The deaeration system removes dissolved gases (primarily CO2 and O2) from dialysate to prevent microbubble formation that could damage the dialyzer membrane.

Which parameter must be verified before connecting a patient to the hemodialysis machine?

Answer: Blood flow rate, dialysate flow rate, temperature, and conductivity

All dialysis prescription parameters must be verified against the patient's prescription before treatment begins.

What action should a technician take if the air detector alarm activates during hemodialysis?

Answer: Clamp the venous line and stop the blood pump immediately

An air detector alarm requires immediate clamping of the venous blood line and stopping the blood pump to prevent air embolism.

How does single-needle dialysis differ from standard two-needle hemodialysis?

Answer: It alternates blood withdrawal and return through a single needle using a dual-lumen approach

Single-needle dialysis uses one needle or dual-lumen catheter, alternating between drawing blood out and returning it, reducing efficiency compared to standard two-needle access.