According to doctors treating her, Sen's condition is deteriorating and she is failing to breathe naturally.
Bengali channels also reported that the actress has requested the doctors in gestures to remove the oxygen pipe from her.
However, her cardiac condition is stable.
Sen has been put under non-invasive ventilator support.
The 82-year-old actress was shifted from a general bed to critical care unit (CCU) late on Dec 29 night.
West Bengal Chief Minister Mamata Banerjee visited the hospital again on Saturday for the fourth time to enquire about her health.
--IBNS (Posted on 12-01-2014)