AASM - Respiratory Rules questions
with verified answers
Describe Obstructive Apnea? - correct answer ✔✔A complete cessation of airflow for at least 10
seconds which includes continued respiratory effort in the chest and/or abdominal leads; O2
desats and/or EEG arousal's frequently occur; Resp effort will decrease slightly; at the end of the
even it is common to see leg jerks, snores, body movements, or full awakenings.
**No desat is required to score an apnea.
How would you score a Hypopnea? - correct answer ✔✔1) The nasal pressure signal excursions
drop by >/= 30% of baseline.
2) The duration of this drop occurs for a period lasting at least 10 seconds.
3) There is a >/= 3% desat from pre-event baseline
4) At least 90% of the event's duration must meet the amplitude reduction of criteria for
hypopnea.
ALTERNATIVE:
1) The nasal pressure signal excursions drop by >/= 50% of baseline.
2) The duration of this drop occurs for a period lasting at least 10 seconds.
3) There is a >/= 3% desat from pre-event baseline or the event is associated with arousal.
4) At least 90% of the event's duration must meet the amplitude reduction criteria for
hypopnea.
* Classification of a hypopnea as obstructive, central, or mixed should not be performed
without a quantitative assessment of ventilatory effort (esophageal manometry, calibrated resp
inductive plethysmography, or diaphragmatic/intercostal EMG).
Describe Central Apnea? - correct answer ✔✔An apnea without respiratory effort; a complete
cessation of airflow for at least 10 seconds with no respiratory effort throughout the entire
event
with verified answers
Describe Obstructive Apnea? - correct answer ✔✔A complete cessation of airflow for at least 10
seconds which includes continued respiratory effort in the chest and/or abdominal leads; O2
desats and/or EEG arousal's frequently occur; Resp effort will decrease slightly; at the end of the
even it is common to see leg jerks, snores, body movements, or full awakenings.
**No desat is required to score an apnea.
How would you score a Hypopnea? - correct answer ✔✔1) The nasal pressure signal excursions
drop by >/= 30% of baseline.
2) The duration of this drop occurs for a period lasting at least 10 seconds.
3) There is a >/= 3% desat from pre-event baseline
4) At least 90% of the event's duration must meet the amplitude reduction of criteria for
hypopnea.
ALTERNATIVE:
1) The nasal pressure signal excursions drop by >/= 50% of baseline.
2) The duration of this drop occurs for a period lasting at least 10 seconds.
3) There is a >/= 3% desat from pre-event baseline or the event is associated with arousal.
4) At least 90% of the event's duration must meet the amplitude reduction criteria for
hypopnea.
* Classification of a hypopnea as obstructive, central, or mixed should not be performed
without a quantitative assessment of ventilatory effort (esophageal manometry, calibrated resp
inductive plethysmography, or diaphragmatic/intercostal EMG).
Describe Central Apnea? - correct answer ✔✔An apnea without respiratory effort; a complete
cessation of airflow for at least 10 seconds with no respiratory effort throughout the entire
event
