Subdural drainage catheter with self contained mechanism for restoration of flow following catheter obstruction

A method for draining the subdural space, said method comprising:

• positioning a subdural drainage system on a patient, the subdural drainage system comprising:
• a subdural drainage housing defining a drainage passageway, the drainage passageway having a lower opening configured to connect to a subdural space of a patient and an upper opening;
• a blockage removal unit in the housing, the blockage removal unit having an end portion that is configured to reduce or remove blockages adjacent the lower opening of the drainage passageway and being movable between a retracted position in which the end portion is in the subdural drainage housing and an extended position in which the end portion of the blockage removal unit extends away from the subdural drainage housing via the lower opening of the drainage passageway;
• and
• at least one side delivery port in the housing and in fluid communication with the drainage passageway, the at least one side delivery port being configured to receive a delivery device so that the delivery device delivers a therapeutic agent to the drainage passageway via the at least one side delivery port;
• and
• moving the blockage removal unit between the retracted and extended positions so that the deformable member automatically extends to an extended, deformed position in which blockages are disrupted in and adjacent the drainage passageway.