Dialysis Equipment Maintenance and Troubleshooting Flashcards

What is the function of the transducer protector on a hemodialysis machine?

Answer: Prevents blood contamination of the pressure monitoring port

The transducer protector is a hydrophobic filter that prevents blood or fluid from entering the machine's pressure transducer, protecting against cross-contamination.

A dialysis machine displays a low arterial pressure alarm. Which condition is LEAST likely to cause this?

Answer: High dialysate conductivity

Low arterial pressure alarms are caused by flow restrictions or inadequate access blood supply; dialysate conductivity does not directly affect arterial line pressure.

How is the heparin pump on a hemodialysis machine typically primed before treatment?

Answer: Flushed with saline until heparin appears at the needle tip

The heparin infusion line is primed with saline and then heparin is advanced to the needle tip to remove air and ensure accurate dosing from the start.

Which parameter does the air detector/foam detector on a dialysis machine monitor?

Answer: Venous blood line for air or foam before blood returns to the patient

The air/foam detector is positioned on the venous return line and will trigger a clamp and alarm to prevent air embolism in the patient.

What is the recommended storage condition for unused dialyzer cartridges?

Answer: Room temperature, away from direct sunlight, within manufacturer expiration date

Dialyzers should be stored at controlled room temperature, protected from light and moisture, and used before the manufacturer's expiration date.

If a dialysis machine's temperature sensor fails during treatment, what is the primary patient risk?

Answer: Hemolysis from overheated dialysate

Dialysate delivered above approximately 42°C can cause thermal hemolysis, destroying red blood cells and releasing potassium with potentially fatal consequences.