When this method is used, the condemned person is usually bound to a gurney and a member of the execution team positions several heart monitors on this skin. Two needles are then inserted into usable veins, usually in the inmates arms. Long tubes connect the needle through a hole in a cement block wall to several intravenous drips. The first is a harmless saline solution that is started immediately. Then, at the warden's signal, a curtain is raised exposing the inmate to the witnesses in an adjoining room. Then, the inmate is injected with sodium thiopental an anesthetic, which puts the inmate to sleep. Next flows pavulon or pancuronium bromide, which paralyzes the entire muscle system and stops the inmate's breathing. Finally, the flow of potassium chloride stops the heart. Death results from anesthetic overdose and respiratory and cardiac arrest while the condemned person is unconscious.