Any hospital may, in its discretion, retire any hospital record or part thereof prior to the expiration of the period of retention established in Section 41-9-69 upon the written consent of the patient involved, if he be an adult and of sound mind, and the consent of the attending physician, if he be alive. If the attending physician be not alive, such records or part thereof may be so retired upon the written consent of such patient. However, in no event shall any consent be valid if given within one (1) year from the date of discharge.