Situated, or occurring behind the pharynx such as retropharyngeal abscess.

Containing, consisting of, or being pus (a purulent discharge or a purulent lesion), accompanied by suppuration (purulent meningitis).

Intolerance to light; especially: painful sensitiveness to strong light.

Of, relating to or marked by paroxysms (the hypertension may be either sustained or paroxysmal).

An EMS professional who provides basic and advanced life support skills and interventions for patients within the EMS system.

Drugs that can be purchased without a prescription.

Inflammation of the ear.

Of, relating to, or caused by erect posture.

A natural plant product (as copaiba or turpentine) containing chiefly essential oil and resin.

The National EMS Scope of Practice Model published by the National Highway Traffic Safety Administration defines and describes four levels of EMS licensure: Emergency Medical Responder (EMR), Emergency Medical Technician (EMT), Advanced EMT (AEMT), and Paramedic. Each level represents a unique role, set of skills, and knowledge base.