In which situation is CPR not necessary?

A valid Do Not Resuscitate (DNR) order indicates that a patient has expressed their wish not to receive CPR or other resuscitative measures in the event of cardiac arrest or respiratory failure. This decision is made by the patient or their legal representative and is documented to ensure that medical personnel respect their wishes. Therefore, in situations where a valid DNR is present, CPR is not necessary, as it goes against the patient’s explicit instructions regarding their desired level of care in emergencies. This emphasizes the importance of honoring the autonomy and choices of patients regarding their own medical care.