Something has bothered the Rad Trad for years, readers. It is the issue of valid ordinations to the diaconate and the priesthood, both the lower and higher degrees. Every Sacrament has an abbreviated version that can be used to emergencies (Baptism on a crashing plane, Absolution or Confirmation in articulo mortis) except for the Eucharist and Holy Order.
When we speak of the intent behind a Sacrament we do not, as many believe, speak of the inner faith of the person confecting the Sacrament; we speak of the intention symbolized in the external forum where a Sacrament is celebrated. Communion cannot come to be in any context other than in the celebration of the Eucharistic sacrifice at the hands of one given the power to do so by a successor of the Apostles. A priest in good standing cannot walk into Trader Joe's, turn to the bakery aisle and say the essential form "This is my body", then face the booze and speak "This is my blood" and expect something to have happened.
Ordination is more complicated, if only because it is less discussed. It is the only Sacrament that is always celebrated in full, without reduced ceremony, within the context of the Eucharistic sacrifice. No short form exists; no extra Missam form exists, at least to my knowledge. While historically one might say that all Sacraments were once celebrated within the context of the Eucharist—save Marriage—Ordination is the only one that does not seem to have budged for a moment. Beyond historical circumstance and the rite's rarity in contrast to Baptism, Marriage, and the rest that most receive, why?
Give your best Thomistic response and do the Angelic Doctor well. If anyone answers in the structure of an article that commentator will receive a free crayon!