All brand names, product names, course names, organization names, and registered trademarks mentioned in this book are the property of their respective owners. Any references to TNCC, Trauma Nursing Core Course, ENA, or other proprietary names are used strictly for identification, educational, and descriptive purposes only. This publication is an independent study aid and has not been sponsored by, endorsed by, approved by, or affiliated with any trademark owner, testing organization, professional association, publisher, or certifying body. The use of trademarked names does not imply any official relationship or authorization. Invest in your professional growth today. Clear thinking and steadier hands start with structured preparation.