BIRRD to get more operation theatres Updated: Updated: TTD plans to cut down on waiting time for surgeries Share Article TTD plans to cut down on waiting time for surgeries The Tirumala Tirupati Devasthanams (TTD) has resolved to construct additional operation theatres at its Balaji Institute of Surgery, Research and Rehabilitation for Disabled (BIRRD) hospital in Tirupati to reduce the waiting time for surgeries. The institute was established to treat patients suffering from poliomyelitis, cerebral palsy, and spinal injuries among others. The free surgeries extended by TTD are drawing thousands of patients, particularly those from northern States, thus resulting in protracted waiting time for surgeries running into several months.