Wis. Stat. § 154.02: Definitions.

In this subchapter:

(1) “Declaration” means a written, witnessed document voluntarily executed by the declarant under s. 154.03 (1), but is not limited in form or substance to that provided in s. 154.03 (2).

(2) “Feeding tube” means a medical tube through which nutrition or hydration is administered into the vein, stomach, nose, mouth or other body opening of a qualified patient.

(3) “Qualified patient” means a declarant who has been diagnosed and certified in writing to be afflicted with a terminal condition or to be in a persistent vegetative state by 2 health care professionals, one of whom is the attending health care professional and one of whom is a physician, who have personally examined the declarant.