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Use and Maintenance of Sleep Study Equipment Flashcards

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  1. What cardiac arrhythmia would require immediate intervention?

    Answer: Asystole

    Asystole is a cardiac arrhythmia that refers to the absence of any electrical activity in the heart. It is considered a medical emergency and requires immediate intervention because it represents a complete cessation of heart function. Without intervention, asystole can quickly lead to cardiac arrest and death. Prompt action, such as cardiopulmonary resuscitation (CPR) and the administration of advanced cardiac life support (ACLS) protocols, is necessary to attempt to restore a normal heart rhythm and prevent further complications.

  2. What is the RECOMMENDED starting pressure for CPAP?

    Answer: 4cm H20

    The recommended starting pressure for CPAP is 4cm H20. This pressure setting is commonly used as a starting point for patients using CPAP therapy. It helps to keep the airway open and prevent collapse during sleep, effectively treating sleep apnea.

  3. What is the RECOMMENDED LFF/HFF for the EOG and EEG channels?

    Answer: LFF 0.3 / HFF 35

    The recommended LFF/HFF for the EOG and EEG channels is LFF 0.3 / HFF 35. This means that the low-frequency filter (LFF) should be set to 0.3 Hz, and the high-frequency filter (HFF) should be set to 35 Hz. These settings are recommended to ensure that the EOG and EEG channels capture the desired frequency range of signals accurately, filtering out any unwanted noise or interference.

  4. What is the RECOMMENDED LFF/HFF for an EMG channel?

    Answer: LFF 10 / HFF 100

    The recommended LFF/HFF for an EMG channel is LFF 10 / HFF 100. This means that the low-frequency filter (LFF) should be set to 10 Hz and the high-frequency filter (HFF) should be set to 100 Hz. These filter settings are chosen to ensure that the EMG signal is captured accurately while filtering out any unwanted noise or interference.

  5. What is the purpose of the low frequency filter?

    Answer: Eliminating undesired slow frequencies

    A low frequency filter, also known as a high-pass filter, is designed to block or attenuate frequencies below a specific cutoff point. In polysomnography, its purpose is to eliminate slow-moving artifacts such as sweat artifact, respiration artifact, or movement artifact. By doing so, it ensures that the recorded signals primarily reflect the desired faster physiological events, improving the clarity and diagnostic quality of the tracing.