Sathya Sai Baba, who has been undergoing treatment for multi-organ dysfunction, continues to be critical but stable, doctors attending on him said today. Most of his indices of the functioning of the organs and vital parameters continue to be nearly normal, a health bulletin issued by the Sathya Sai Institute of Higher Medical Sciences, Super Speciality hospital said at Puttaparthi in Andhra Pradesh. However, the condition of his liver and occasional spells of low blood pressure continue to worry the treating doctors, the bulletin said. 86-year-old Saibaba was hospitalised on March 28 following problems related to heart and respiration.