Iconic Bengali actress Suchitra Sen is partially responding to intermittent non-invasive ventilation support but is not out of danger yet a doctor said Sunday. Sen was put on non-invasive ventilator support after her condition deteriorated two days back at the critical care unit of a city nursing home. Though her oxygen saturation has improved since Friday it still needs continuous monitoring said the latest medical bulletin. 'Because her health condition is fluctuating...we can't say that she is out of danger yet' said Subrata Maitra member of the team of seven experts monitoring Sen at the Belle Vue Clinic here. Sen's