Who must sign the DNRO form and patient identification device for them to be valid?

The validity of the Do Not Resuscitate Order (DNRO) form and patient identification device hinges on the signature of both the patient or their healthcare surrogate and the physician. This ensures that the patient's wishes regarding resuscitation are clearly documented and understood by medical personnel. The patient’s signature or the healthcare surrogate’s signature indicates that there is an informed decision that reflects the patient's preferences or medical directives.

Involving the physician's signature is equally important as it signifies medical authority and verifies that the DNRO complies with legal and clinical standards. The physician's involvement ensures that the order is not only a personal decision of the patient but also one endorsed by a qualified medical professional who can affirm the medical necessity and appropriateness of the order in relation to the patient's condition.

The other options lack crucial elements required for the order’s validity: solely relying on the patient's physician does not involve confirmation of the patient’s desires, while the involvement of a medical director or healthcare proxy does not encompass the necessary elements of both patient consent and physician endorsement to uphold the legal and ethical standards involved in such critical decisions.