The Department was established in 1947 and is currently divided into three major Departmentsâthe Department of the Army, Navy and Air Forceâand has a military staff of 1,418,542 (553,044 US Army; 329,304 US Navy; 202,786 US Marine Corps; 333,408 US Air Force). The DoD is headed by the Secretary of Defense.
PREEMPTIVE analgesia is an antinociceptive treatment that prevents establishment of altered processing of afferent input, which amplifies postoperative pain. The concept of preemptive analgesia was formulated by Crile at the beginning of the previous century on the basis of clinical observations.
Premature rupture of membranes (PROM) is rupture of membranes before labor. Preterm PROM refers to the rupture of membrane before labor that occurs prior to 37 weeks of gestation. Preterm PROM complicates approximately 3% of all pregnancies in the United States .