Bobbi Kristina Brown, 21, remains in a medically induced coma at Emory University Hospital in Atlanta.
Doctors have removed her breathing tube, two sources close to the family told CNN on Thursday, one day after the procedure supposedly took place.
Brown, daughter of late singing star Whitney Houston, will now be ventilated through a hole in her throat.
"This is an indication that the patient will need this for weeks and months to come, as opposed to hours and days," said CNN's chief medical correspondent Dr. Sanjay Gupta.
He said the move lowers the risk of infection and is standard procedure.
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