This fourth in a series of ten videos was developed in order to teach Medical Qigong students how to avoid Energetic Depletion and the Toxic Invasion of the patient’s pathogenic Qi when operating a Medical Qigong clinic, as well as how and when to properly and safely Purge, Tonify and Balance the patient’s internal organs and energetic fields. This corse contains the following meditations and clinical procedures: How to create an Energetic Force Field in order to prevent the invasion of the patient’s Toxic Qi, The Ren Wu Zang Meditation, Energetic Boundary Invasion, Examples of Purging, Tonification and Regulation Therapeutic Techniques, Ending the Treatment, The Doctor/Patient Intake, Homework and Medical Qigong Prescriptions.