1. Central Sleep Apnea in Cancer Patients on Opioids
Janet R. Hardy, FRACP, MD 
Journal of Pain and Symptom Management 
Volume 40, Issue 3, Pages e3-e5 (September 2010)
DOI: /j.jpainsymman
Copyright © 2010 U.S. Cancer Pain Relief Committee Terms and Conditions

2. Fig. 1
A 5 minute epoch from the polysomnogram. Each of the faint vertical lines represents 5 secs. The patient is in stage 2 (shallow) sleep. Airflow measurements (nasal catheter pressure change) indicate around 4 breaths per minute (in pairs), representing significant bradypnea. During periods of intervening apnea, no abdominal (Abdo) or thoracic (Thor) signals occur, indicating central apnea (Cn A). Several arousals (ARO RES) are associated with these events. In this epoch, oxygen desaturations (Desat) occur to a nadir of 91%.
Journal of Pain and Symptom Management  , e3-e5DOI: ( /j.jpainsymman )
Copyright © 2010 U.S. Cancer Pain Relief Committee Terms and Conditions