For purposes of sections 23-1825 to 23-1832:

(1) Coroner means a coroner or his or her designated representative;

(2) Decedent means an individual with respect to whom a determination of death has been made pursuant to section 71-7202;

(3) Donor has the definition found in section 71-4825; and

(4) Preliminary investigation means an inquiry into whether any organs or tissues are necessary to determine the proximate cause or means of death.