John
I haven’t read the rest of your post but must correct a misconception on your part:
A tracheostomy is not going to get rigidly paralysed chest muscles moving.
The purpose of the tracheostomy is to introduce a tube into the trachea which will enable a machine to pump air intermittently through the trachea and bronchi into the lung in the presence of muscle paralysis as a result of a nerve agent or induced medically.