Consent Understanding and Propofol Requirement During Endobronchial Ultrasound

The goal of this observational study is to learn whether a participant's understanding of the informed consent information is related to the amount of propofol needed during endobronchial ultrasound (EBUS). EBUS is a procedure that uses a thin camera and ultrasound to look at lymph nodes and other areas inside the chest. Propofol is a sedative medicine used to help participants stay comfortable during the procedure. Before EBUS, all participants will receive the usual information about the procedure as part of routine care. After this routine consent process, participants will answer short questions about what they understood. They will also answer questions about their anxiety before the procedure. The study will not change the usual consent process, sedation plan, or medical care. During EBUS, participants will receive usual sedation and monitoring according to routine clinical practice. The research team will record how much sedative medicine is used, whether extra sedation is needed, whether any important clinical events occur, and how participants recover after sedation. The main question is whether participants who understand the consent information better need less propofol during EBUS.