Evaluation of Various Methods Used to Identify the Proximal Humerus Intraosseous Vascular Access Site

Inclusion Criteria Device Operators: * Recent/current experience in the medical field as a practicing clinician. * Currently licensed/certified Emergency Medicine Technician, paramedic, or nurse * Have had no formal training on use of the proximal humerus intraosseous insertion site. Exclusion Criteria Device Operators: There is no exclusion criteria Inclusion Criteria Healthy Volunteers * Age 21 years or older. * Has no amputation of the upper extremities. * Able to lay flat on table for up to 2 hours. * Self-reported as healthy. Exclusion Criteria Healthy Volunteers: * Have an active infection in the body * Imprisoned * Pregnant * Cognitively impaired * Fracture in humerus, or significant trauma to the site * Excessive tissue and/or absence of adequate anatomical landmarks in humerus * Infection in target area * Humeral intraosseous insertion in past 48 hours, prosthetic limb or joint or other significant orthopedic procedure in humerus * Current use of anti-coagulants