CCHT Dialysis Equipment Operation 2

Question 1

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

Accepted Answer

Concentration of electrolytes in the dialysate solution

Answer

Flow rate of dialysate through the circuit

Answer

Temperature of the blood returning to the patient

Answer

Pressure in the venous blood line

Question 2

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

Accepted Answer

Clotting in the venous needle or access

Answer

Air in the blood lines

Answer

Low dialysate temperature

Answer

Inadequate heparin dosing

Question 3

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

Accepted Answer

Remove dissolved gases from dialysate before patient contact

Answer

Remove bacteria from dialysate

Answer

Cool the dialysate to proper temperature

Answer

Measure dialysate flow rate

Question 4

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

Accepted Answer

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

Answer

The dialysate color and turbidity

Answer

The machine's last service date

Answer

The patient's hemoglobin level

Question 5

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

Accepted Answer

Clamp the venous line and stop the blood pump immediately

Answer

Silence the alarm and continue treatment

Answer

Increase the blood pump speed

Answer

Remove the patient from the circuit gently

Question 6

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

Accepted Answer

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

Answer

It uses one needle for access and relies on peritoneal membranes for diffusion

Answer

It requires a higher blood flow rate to compensate for single access

Answer

It is only used for patients with central venous catheters