Essentials Of Polysomnography Is A 615-Page Full Color Text Designed Specifically For Sleep Technicians And Professionals. This Textbook Is Written By William H Spriggs, An Experienced Author And Instructor In Polysomnography, And Is Used In Hospitals, Sleep Labs, Physician Offices, And Colleges And Universities Around The World.Essentials Of Polysomnography Is The First Book To Include The New Recording And Scoring Rules Presented In 2007, As Well As The Latest Sleep Disorder Definitions And Categorization Presented In 2005. This Text Is Designed Around The Board Exam For Sleep Technicians, And Includes 500 Questions With Answers And Explanations. It Is Also Ideal For Training New Sleep Technicians And Students Interested In Studying Polysomnography, As Well As Physicians, Sleep Lab Managers, DME Reps, And Sleep Lab Front Office Staff Members.