An Advance Medical Directive (AMD)
is a legal document you sign in
advance to inform your doctor that
you do not want the use of any life-sustaining treatment to be used
to prolong your life
in the event you become terminally ill and unconscious and where
death is imminent.
https://www.moh.gov.sg/content/moh_web/home/policies-and-issues/advance_medical_directiveamd.html
本表格的第一部份是萬一在您失去能力為自己做出決定的情況下，先讓您指定一個人
來作您醫護決定上的代理人，或者倘若您希望別人立即開始為您做出這些決定雖然您
目前仍有能力勝任。您也可以指定一位後補代理人，倘若您的第一代理人選不願意，
不能夠，或在合理情況下不能在場為您做醫護決定時，該後補代理人可以替您作決
定。
The AMD can be made by any
person, aged 21 years and above,
and is not mentally
disordered.
The AMD form is a legal document which must be completed and signed
in the presence of two witnesses before it is returned to the
Registrar of AMDs.
The patient's doctor must be one of the two witnesses,
while the other witness must be at least 21 years old. In
addition,
both witnesses must not have any vested interests in the patient's
death.
https://www.moh.gov.sg/content/dam/moh_web/Forms/FORM1AMD(270905).pdf
http://www.cpmc.org/services/ethics/pubs/advdir_chinese.pdf