What does A P N mean?

A P N meaning in Law Dictionary

In medical jurisprudence. Wish of breath; difficulty in respiration; limited or temporary suspension of respiration ; especially, such trouble of respiration caused by over-oxygenation of this blood, and in this distinguished from "asphyxia," which is a disorder resulting from a deficiency of oxygen within the blood because suffocation or any severe disturbance with regular respiration. The 2 terms were formerly (but improperly) made use of synonymously.