Specific or detailed instructions to your healthcare provider are done in the Healthcare Directive. This document is intended primarily for issues that are not legal in nature. For example, you can use the Healthcare Directive to inform your physician that you do not want blood transfusions. You should consult with your primary caregiver and then manually add your wishes and specific instructions (other examples: hydration, pain medication, organ donation, etc.) to your Healthcare Directive.
In addition, you can make sure you provide verbal and written instructions to the individuals you empowered to make healthcare decisions on your behalf so your healthcare agents can make sure that your wishes are carried out.