Why Medical Terminology Matters in EMS
Medical terminology is the language of healthcare. When you radio the hospital that your patient has "substernal chest pressure with diaphoresis and dyspnea," the receiving team immediately understands the situation and can prepare accordingly. Using proper medical terminology improves communication accuracy, reduces errors, and demonstrates professionalism. The NREMT exam also tests your understanding of medical terms in clinical scenarios.
Medical terms are built from three components: prefixes (which modify the meaning), root words (which identify the body part or condition), and suffixes (which describe a condition, procedure, or quality). Learning these building blocks allows you to decode unfamiliar terms by breaking them into their components.
Essential Prefixes
Knowing common prefixes helps you understand the direction or quality of a term:
- Hyper- means excessive or above normal (hypertension, hyperglycemia, hyperthermia)
- Hypo- means deficient or below normal (hypotension, hypoglycemia, hypothermia)
- Tachy- means fast (tachycardia, tachypnea)
- Brady- means slow (bradycardia, bradypnea)
- Dys- means difficult or abnormal (dyspnea, dysrhythmia)
- A- or An- means without (apnea, anoxia, asystole)
- Poly- means many or excessive (polydipsia, polyuria)
- Hemi- means half (hemiplegia, hemiparesis)
Root Words for Body Systems
Root words identify the body structure being discussed. Cardio refers to the heart, pulmo or pneumo refers to the lungs, hepato refers to the liver, nephro or reno refers to the kidneys, neuro refers to the nervous system, osteo refers to bone, and gastro refers to the stomach. Combining these with prefixes and suffixes creates specific terms: "cardio" (heart) + "megaly" (enlargement) = cardiomegaly (enlarged heart).
Common Suffixes
Suffixes describe what is happening to the body part identified by the root word:
- -itis means inflammation (appendicitis, bronchitis, meningitis)
- -ectomy means surgical removal (appendectomy, cholecystectomy)
- -osis means condition or disease (cyanosis, stenosis, thrombosis)
- -algia means pain (myalgia, neuralgia, arthralgia)
- -pnea means breathing (dyspnea, apnea, tachypnea)
- -emia means blood condition (anemia, septicemia, hypoglycemia)
Common EMS Abbreviations
EMS uses many abbreviations in documentation and communication. Essential ones include: AMS (altered mental status), SOB (shortness of breath), LOC (loss of consciousness or level of consciousness), NRB (nonrebreather mask), BVM (bag-valve mask), BP (blood pressure), HR (heart rate), RR (respiratory rate), SpO2 (pulse oximetry), GCS (Glasgow Coma Scale), MOI (mechanism of injury), and Hx (history). Always spell out abbreviations if there is any risk of confusion, and follow your agency's approved abbreviation list for documentation.