DORB in a medical context stands for Discharge On Risk Bond. It refers to a situation where a patient leaves a hospital without completing the prescribed treatment, against the medical advice of the attending physician, but with the understanding that they are assuming the risks associated with their decision. It's essentially leaving the hospital voluntarily before the doctor decides they are ready to be discharged.
In some settings, patients may be required to sign a "risk bond" or similar document acknowledging these risks before being discharged. This document helps protect the hospital from potential liability if the patient experiences negative health outcomes after leaving prematurely.