CHBT Dialysis Equipment Maintenance and Troubleshooting

Question 1

What is the primary purpose of a conductivity alarm on a hemodialysis machine?

Accepted Answer

To detect incorrect dialysate concentration

Answer

The conductivity alarm detects deviations in dialysate ionic concentration, protecting patients from hypo- or hypertonic dialysate exposure.

Question 2

How often should hemodialysis machine proportioning systems be calibrated according to standard practice?

Accepted Answer

Per manufacturer schedule, typically monthly or after repair

Answer

Calibration frequency follows the manufacturer's recommendations, typically monthly or after any repair that could affect fluid delivery accuracy.

Question 3

Which component is responsible for generating the negative transmembrane pressure that drives ultrafiltration in a dialysis machine?

Accepted Answer

Ultrafiltration controller

Answer

The ultrafiltration controller regulates the pressure differential across the dialyzer membrane to achieve the prescribed fluid removal rate.

Question 4

A blood leak alarm activates during treatment. What is the correct first response by the biomed technician verifying the alarm?

Accepted Answer

Inspect the dialysate outflow for pink or red discoloration

Answer

Visual inspection of the dialysate effluent for discoloration confirms whether a true blood leak has occurred through the membrane.

Question 5

What does a high venous pressure alarm most commonly indicate?

Accepted Answer

Clotted or kinked venous blood line

Answer

High venous pressure typically results from an obstruction in the venous return line, such as a clot, kink, or access problem.

CHBT - Certified Hemodialysis Bio-Medical Technician Practice Test