You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is What is the probable diagnosis in the patient with below flow volume loop (FVL)? and explain in detail?
The above FVL is a typical of fixed central airway obstruction (Either above or below the thoracic inlet) such as tracheal stenosis. In this, there is limitation to peak flow rate,Flattened inspiratory and expiratory curves are seen. Other FVL patterns: 1.Normal 2. Airflow obstruction:- COPD 3. Fixed Upper Airway obstruction 4.Variable upper airway obstruction 5.