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Week 1: Historical Development of the Advanced Practice Nursing Role, Systematic Inquiry andEvidence-Based Practice (EBP) - Discussion Part OneInstructor Candice Phillips & Classmates, The four roles of the APN are: Certified registered nurse anesthetist (CRNA), certified nurse midwife (CNM), clinical nurse specialist (CNS), and certified nurse practitioner (CNP). The CRNA can administer anesthesia surgical procedures in collaboration with surgeons, anesthesiologists, obstetricians, dentist, and other qualified health care professionals. The CRNA is a MSN (masters of nursing) or DNP (doctor of nursing) degree with the focus being anesthesiaadministration. For Mary a con to this APN role may be the lack of rapport with the patient. The CNS specializes in the patient population and specific setting such as hospitals and clinics and requires a MSN. The CNS can provide acute and chronic care management and as well as education and advocacy. The CNM requires a MSN or DNP and focuses on women’s health and childbirth.