I do not know that feeding tubes are so defined. Do you know that?
The Legislature has also defined what is a "life-prolonging procedure":
Relevant statutes:
The Legislature recognizes that for some the administration of life-prolonging medical procedures may result in only a precarious and burdensome existence. In order to ensure that the rights and intentions of a person may be respected even after he or she is no longer able to participate actively in decisions concerning himself or herself, and to encourage communication among such patient, his or her family, and his or her physician, the Legislature declares that the laws of this state recognize the right of a competent adult to make an advance directive instructing his or her physician to provide, withhold, or withdraw LIFE-PROLONGING PROCEDURES, or to designate another to make the treatment decision for him or her in the event that such person should become incapacitated and unable to personally direct his or her medical care.
§ 765.102(3), Florida Statutes.
"Life-prolonging procedure" means any medical procedure, treatment, or intervention, including artificially provided sustenance and hydration, which sustains, restores, or supplants a spontaneous vital function. The term does not include the administration of medication or performance of medical procedure, when such medication or procedure is deemed necessary to provide comfort care or to alleviate pain.
§ 765.101(10), Florida Statutes
Simply striking "including artificially provided sustenance and hydration" and puting it under the heading of "comfort care" would have done the trick, not just for Terri, but for the next case, if there is one.
They were not so defined when Terri supposedly stated her "wish" not to be kept alive by extraordinary means. When Michael Schiavo, George Felos, was unable to have Terri dehydrated because the statutes didn't allow it, he worked to have the law changed to facilitate the completion of Terri's murder.