 The patient may require a sleep study after discharge, but by the third day prior to discharge he was no longer utilizing BiPAP, was simply using supplemental O2 at night and was able to maintain appropriate and satisfactory O2 saturations on one-liter per minute supplemental O2 per nasal cannula. 
The patient may require a sleep study after discharge , but by the third day prior to discharge he was no longer utilizing BiPAP , was simply using supplemental O2 at night and was able to maintain appropriate and satisfactory O2 saturations on one - liter per minute supplemental O2 per nasal cannula .