Note: I fully understand that God is Sovereign King over all things, and none of us have the ability to stay alive (nor die) if it is not the Lords will.
Hitting the crossroads of Philippians chapter 1, between verses 21 thru 23 (to die and be with the Lord), to verses 24 thru 26, (to remain alive and be fruitful).
“21 For to me, to live is Christ, and to die is gain. 22 But if I live on in the flesh, this will mean fruit from my labor; yet what I shall choose I cannot tell. 23 For I am hard-pressed between the two, having a desire to depart and be with Christ, which is far better. 24 Nevertheless to remain in the flesh is more needful for you. 25 And being confident of this, I know that I shall remain and continue with you all for your progress and joy of faith, 26 that your rejoicing for me may be more abundant in Jesus Christ by my coming to you again” (Philippians 1:21-23).
“Do not resuscitate (DNR), also known as no code or allow natural death, is a legal order written either in the hospital or on a legal form to withhold cardiopulmonary resuscitation (CPR) or advanced cardiac life support (ACLS), in respect of the wishes of a patient in case their heart were to stop or they were to stop breathing. “No code” is a reference to the use of “code” as jargon for “calling in a Code Blue” to alert a hospital’s resuscitation team. The DNR request is usually made by the patient or health care power of attorney and allows the medical teams taking care of them to respect their wishes. In the health care community, allow natural death (AND) is a term that is quickly gaining favor as it focuses on what is being done, not what is being avoided.  Some criticize the term “do not resuscitate” because it sounds as if something important is being withheld, while research shows that only about 5% of patients who require CPR outside the hospital and only 15% of patients who require CPR while in the hospital survive. Patients who are elderly, are living in nursing homes, have multiple medical problems, or who have advanced cancer are much less likely to survive.” 
 Wikipedia, Do not resuscitate https://en.wikipedia.org/wiki/Do_not_resuscitate (Accessed on March 13th, 2017)