Medical Negligence of a Hospital in India

Rohan, a 30-year-old engineer, underwent an elective knee surgery at XYZ Hospital in Delhi. The surgeon, Dr. Kumar, negligently left a surgical instrument inside Rohan's knee joint. The next day, Rohan developed severe pain and discharge, and the instrument was discovered on X-ray. Rohan required another surgery to remove the instrument and has been bedridden for 3 months due to complications. He has incurred significant medical bills and has lost his job due to the prolonged absence. He claims that the hospital is liable for his injuries. What legal remedy applies in Rohan's case under the Indian Law of Torts?