There has been slight improvement in the health of ailing veteran actress Suchitra Sen today, but poor oxygenation of blood due to a lung infection remains a cause of concern, according to doctors.

"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.