The condition of iconic Bengali actress Suchitra Sen, who was put on non-invasive ventilator support after her condition deteriorated Friday night, has shown `steady improvement` since Saturday night, a doctor said Sunday. Suchitra`s breathing problem worsened Friday, leading to dipping of her oxygen saturation and, thus, necessitating the ventilator support. Though her condition stabilised the next day, owing to the continuously fluctuating oxygen saturation, she was put on intermittent non-invasive ventilation. Her oxygen saturation level is "nearly normal" and she is responding to treatment gradually, said Subir Mondal, member of the team of experts monitoring Suchitra at the Belle Vue Clinic here. "She needed the support for not more than an hour last night. Her other vital parameters are satisfactory," Mondal told IANS. The 82-year-old has been on nasal oxygen (through a flexible plastic tube) at her residence for the last few years. "She still needs that nasal oxygen but the non-invasive form (via oro-facial masks) is not needed at the moment," said Mondal. She is receiving chest physiotherapy and her health condition has been reviewed by two chest specialists. Her actress-granddaughter Raima Sen took to Twitter Saturday to convey the screen legend`s better health. The veteran actress is undergoing treatment for a chest infection at the hospital since Dec 23. Suchitra was taken to the critical care unit (CCU) after her condition deteriorated Dec 28 night. She is known for her performances in films like `Deep Jwele Jaai` and `Uttar Falguni` in Bengali as well as Hindi movies such as `Devdas`, `Bombai Ka Babu` and `Mamta`. She won the best actress award for "Saat Paake Bandha" at the Moscow Film Festival in 1963.