Introduction to Medical Abbreviations
Medical terminology abbreviations serve as shorthand within healthcare environments, allowing professionals to communicate efficiently. These shortened terms are used in clinical notes, prescriptions, medical records, and during verbal exchanges between healthcare providers. While they streamline communication, they can also present challenges in comprehension and patient safety when not properly understood.
Most medical abbreviations derive from Latin and Greek roots. For example, "b.i.d." comes from the Latin phrase "bis in die" (twice a day) and "q.d." from "quaque die" (every day). Understanding these linguistic origins helps healthcare professionals both interpret existing abbreviations and form new ones correctly.
Common Medical Abbreviations
Frequently Used General Abbreviations
| Abbreviation | Full Term | Meaning |
|---|---|---|
| ABG | Arterial Blood Gas | Blood test measuring oxygen, carbon dioxide, and acidity |
| BP | Blood Pressure | Measurement of pressure in arteries |
| CBC | Complete Blood Count | Blood test measuring various components |
| DNR | Do Not Resuscitate | Order indicating not to perform CPR |
| NPO | Nil Per Os (Nothing By Mouth) | Instruction to withhold food and liquids |
| PRN | Pro Re Nata (As Needed) | Medication given when necessary |
| SOB | Shortness of Breath | Difficulty breathing |
| STAT | Immediate | Required urgently |
Vital Signs and Measurements
| Abbreviation | Full Term | Normal Range |
|---|---|---|
| HR | Heart Rate | 60-100 beats per minute |
| RR | Respiratory Rate | 12-20 breaths per minute |
| T | Temperature | 97.8-99.1F (36.5-37.2C) |
| SpO | Oxygen Saturation | 95-100% |
| BMI | Body Mass Index | 18.5-24.9 |
Diagnostic Tests and Procedures
- CT - Computed Tomography (scan)
- ECG/EKG - Electrocardiogram
- EEG - Electroencephalogram
- EMG - Electromyography
- MRI - Magnetic Resonance Imaging
- PET - Positron Emission Tomography
- US - Ultrasound
- XRT - Radiation Therapy
Specialty-Specific Abbreviations
Cardiology
| Abbreviation | Full Term |
|---|---|
| AFib | Atrial Fibrillation |
| CABG | Coronary Artery Bypass Graft |
| CHF | Congestive Heart Failure |
| CPR | Cardiopulmonary Resuscitation |
| HTN | Hypertension |
| MI | Myocardial Infarction |
| STEMI | ST-Elevation Myocardial Infarction |
Pulmonology
| Abbreviation | Full Term |
|---|---|
| COPD | Chronic Obstructive Pulmonary Disease |
| CPAP | Continuous Positive Airway Pressure |
| PE | Pulmonary Embolism |
| TB | Tuberculosis |
| URI | Upper Respiratory Infection |
| VAP | Ventilator-Associated Pneumonia |
Neurology
| Abbreviation | Full Term |
|---|---|
| ALS | Amyotrophic Lateral Sclerosis |
| CVA | Cerebrovascular Accident |
| ICP | Intracranial Pressure |
| MS | Multiple Sclerosis |
| TIA | Transient Ischemic Attack |
Endocrinology
| Abbreviation | Full Term |
|---|---|
| DM | Diabetes Mellitus |
| T1DM/T2DM | Type 1/Type 2 Diabetes Mellitus |
| DKA | Diabetic Ketoacidosis |
| HbA1c | Hemoglobin A1c |
| TSH | Thyroid Stimulating Hormone |
| BG | Blood Glucose |
Medical Prefixes and Suffixes
Common Prefixes
- a-/an- - without, lack of (e.g., analgesic)
- anti- - against (e.g., antibiotic)
- auto- - self (e.g., autoimmune)
- bi- - two, twice (e.g., bilateral)
- brady- - slow (e.g., bradycardia)
- dys- - difficult, abnormal (e.g., dysphagia)
- endo- - internal (e.g., endocrine)
- hyper- - excessive (e.g., hypertension)
- hypo- - deficient (e.g., hypothyroidism)
- neo- - new (e.g., neoplasm)
- pan- - all (e.g., pancytopenia)
- post- - after (e.g., postoperative)
- pre- - before (e.g., prenatal)
- sub- - under (e.g., subcutaneous)
- tachy- - fast (e.g., tachycardia)
Common Suffixes
- -algia - pain (e.g., neuralgia)
- -cele - herniation (e.g., hydrocele)
- -centesis - surgical puncture (e.g., amniocentesis)
- -esthesia - sensation/feeling (e.g., anesthesia)
- -itis - inflammation (e.g., gastritis)
- -logy - study of (e.g., cardiology)
- -lysis - destruction (e.g., hemolysis)
- -megaly - enlargement (e.g., splenomegaly)
- -ology - study of (e.g., neurology)
- -opathy - disease (e.g., nephropathy)
- -pnea - breathing (e.g., dyspnea)
- -scopy - examination (e.g., colonoscopy)
- -therapy - treatment (e.g., chemotherapy)
Safety Alert: Some medical abbreviations are discouraged or prohibited due to potential for misinterpretation. The Joint Commission's "Do Not Use" list includes abbreviations that have been associated with medication errors and misdiagnosis.
Time Frequency Abbreviations
| Abbreviation | Latin Origin | Meaning |
|---|---|---|
| a.c. | ante cibum | Before meals |
| b.i.d. | bis in die | Twice a day |
| h.s. | hora somni | At bedtime |
| p.c. | post cibum | After meals |
| p.o. | per os | By mouth (orally) |
| q.d. | quaque die | Once a day |
| q.i.d. | quater in die | Four times a day |
| q.h. | quaque hora | Every hour |
| q.o.d. | quaque omni die | Every other day |
| t.i.d. | ter in die | Three times a day |
Routes of Administration
| Abbreviation | Full Term |
|---|---|
| IM | Intramuscular |
| IN | Intranasal |
| IO | Intraosseous |
| IV | Intravenous |
| PR | Per Rectum (rectally) |
| SC/SC | Subcutaneous |
| SL | Sublingual |
| TOP | Topical |
Conclusion
Medical terminology abbreviations constitute an essential component of healthcare communication, but their increasing complexity has raised concerns about patient safety. Healthcare organizations are standardizing acceptable abbreviations and discouraging ambiguous terms. As healthcare continues to evolve, so too does the language used within it, with emphasis moving toward clarity and patient safety. Understanding these abbreviations is fundamental for healthcare professionals, but equally important is knowing when clarity should take precedence over brevity.
