Which procedure is not directly involved in lung surgery?

The procedure that is not directly involved in lung surgery is the use of drainage catheters. While drainage catheters can be used to manage complications associated with lung surgery, such as pleural effusions or empyema, they do not constitute a surgical procedure aimed at the lung tissue itself.

In contrast, lobectomy, pneumonectomy, and decortication of the lung are surgical procedures specifically aimed at the lung. A lobectomy involves the removal of a lobe of the lung, pneumonectomy entails the removal of an entire lung, and decortication is a procedure to remove the fibrous tissue that can develop on the lung, often due to infection or inflammation. All of these procedures are directly related to lung surgery, targeting lung structure and pathology.