This document discusses the principles and standards of psychiatric nursing. It begins by defining key terms like mental health, psychiatry, psychology, and psychiatric nursing. It then outlines 12 general principles of mental health nursing which focus on accepting clients, understanding oneself, ensuring client security, giving reassurance, avoiding increases in anxiety, objective observation, maintaining therapeutic relationships, and modifying procedures based on individual needs. The document also discusses 5 professional practice standards for psychiatric nursing: applying relevant theory, comprehensive assessment, utilizing diagnoses, developing individualized care plans, and implementing therapeutic interventions.