"Mrs Suchitra Sen's medical condition is stable since yesterday. However, her oxygen saturation is still fluctuating continuously necessitating intermittent non-invasive ventilation," a medical bulletin from the hospital where she was admitted on December 23 said.
Doctors attending to the 82-year-old said her vital parameters like heart rate and blood pressure level was satisfactory.
Her condition had deteriorated yesterday after which she was given non-invasive ventilation at irregular intervals for oxygen support.
She has been put on physiotherapy at a private Intensive Care Unit cabin.
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A five-member medical board at the super-speciality hospital led by Dr Subrata Maitra was monitoring her health round-the-clock.
Actress Raima Sen, her grand-daughter, tweeted, "My grandma is better .. Thank you for your prayers . . Keep praying."
Sen who has kept herself away from public eye for the last three decades was the first Indian actress to win the best actress award internationally at the Moscow Film Festival.