What if a person is unable to receive under the form of bread?
41. In case of necessity and at the discretion of the bishop, it is permissible for the eucharist to be given under the form of wine alone to those who are unable to receive it under the form of bread.
In this case the celebration of Mass in the presence of the sick person is permissible, at the discretion of the local Ordinary.
If, however, Mass is not celebrated in the presence of the sick person, the blood of the Lord should be preserved in a properly covered chalice and placed in the tabernacle after Mass; it should not be carried to the sick person unless it is enclosed in a container that prevents any danger of spilling. In administering the sacrament, the method best suited to the individual case should be chosen from among those indicated in the rites for use in distributing communion under both kinds. If, after communion has been given, some of the precious blood remains, the minister is to consume it; he is also to see to the required ablutions.
Bishops are to make the determination, including the celebration of Mass, when the Precious Blood cannot be brought to a sick person.