The 82-year-old actress still needs non-invasive ventilation at irregular intervals for oxygen support and could not be be said to be out of danger yet, they said.
Stating that her condition continued to remain stable, a medical bulletin issued by super-speciality hospital Belle Vue Clinic said fluctuation of her oxygen saturation needed continuous monitoring.
"She has received physiotherapy. She is having light diet as prescribed. Because of continuous monitoring of her vital parameters which might need active emergency intervention, she will continue to be observed in ITU setting," it said.
The actress was admitted to the hospital on December 23 following a respiratory tract infection.
Sen who has kept herself away from the public eye for the last three decades has starred in memorable Hindi and Bengali films like 'Devdas', 'Aandhi', 'Saat Paake Bandha', 'Agnipariksha', 'Saptopadi' and 'Deep Jele Jai'.