Free BRPT Advanced Polysomnography Techniques and Protocols Questions and Answers

Question 1

The technician observes muscle artifact in a single EEG channel that shares a common reference with other channels. The appropriate response is:

Accepted Answer

Re-reference the channel showing artifact by changing the input signal derivation to a back-up exploring electrode

Answer

Muscle artifact in an EEG channel can occur due to electrical activity generated by muscle movements. Re-referencing the channel to a back-up exploring electrode can help eliminate the artifact by changing the reference point for that channel. This can reduce the influence of muscle activity on the EEG signal and improve the quality of the recording.

Question 2

The preferred method of correcting undesirable artifacts during the recording process is to:

Accepted Answer

Changing the input signal derivations

Answer

The preferred method of correcting undesirable artifacts during the recording process is to change the input signal derivations. This means altering the way the signals are obtained or derived from their source. By doing so, it is possible to minimize or eliminate the artifacts that may have been introduced during the recording process. This method is often more effective than manipulating filters or temporarily adjusting amplifier sensitivity or gain, as it directly addresses the root cause of the artifacts.

Question 3

If 60Hz artifact is observed in one of the channels during the bio-cals process, the appropriate action should be:

Accepted Answer

Find the problem source and correct it before beginning the study

Answer

If a 60Hz artifact is observed in one of the channels during the bio-cals process, the appropriate action would be to find the problem source and correct it before beginning the study. This is because the artifact could potentially interfere with the accuracy of the study results. By identifying and fixing the problem source, the artifact can be eliminated, ensuring reliable data collection during the study. Re-evaluating the problem after the patient goes to sleep, re-referencing to a back-up electrode, or using a 60Hz notch filter may not address the underlying issue causing the artifact and may not provide a long-term solution.

Question 4

What factors come into play when deciding to enter the patients room to correct artifacts?

Accepted Answer

All of the above

Answer

When deciding to enter the patient's room to correct artifacts, several factors come into play. The importance of the electrode channel in scoring is a crucial factor as it directly affects the accuracy of the data collected. Additionally, the ease at which the patient falls asleep is important as it determines the disruption caused by entering the room. Lastly, the skill at fixing the problem without waking the patient is significant to ensure minimal disturbance to their sleep. Therefore, all of the above factors need to be considered when deciding to enter the patient's room to correct artifacts.

Question 5

Double-referencing (A1+A2) may be useful for?

Accepted Answer

Reduce EKG artifact in EEG and EOG Channels

Answer

Double-referencing (A1+A2) is useful for reducing EKG artifact in EEG and EOG channels. EKG artifact refers to interference caused by electrical activity of the heart, which can contaminate the EEG and EOG signals. Double-referencing involves using two reference electrodes (A1 and A2) instead of a single reference electrode, which helps to cancel out common-mode noise, including EKG artifact. By reducing the EKG artifact, the quality and accuracy of the EEG and EOG signals can be improved.

BRPT - Board of Registered Polysomnographic Technologists Practice Test

BRPT - Board of Registered Polysomnographic Technologists Practice Test

Free BRPT Advanced Polysomnography Techniques and Protocols Questions and Answers