20. Internal Medicine
Learning Objectives
- Describe the scope of internal medicine and the subspecialties it encompasses
- Explain how internists use clinical reasoning to synthesize history, examination, and investigations
- Identify core diagnostic tools used in adult medicine and their clinical applications
- Apply the four principles of medical ethics to real patient scenarios
- Distinguish between the roles of primary care physicians and internal medicine subspecialists
- Recognize when to initiate preventive interventions such as screenings and vaccinations
Quick Answer
Internal medicine is the branch of medicine focused on preventing, diagnosing, and treating diseases in adults. Internists manage complex, multi-system illnesses and serve as both primary care providers and consultants. The specialty is built on systematic clinical reasoning — taking a thorough history, performing a physical exam, ordering targeted investigations, and synthesizing all findings into a diagnosis and treatment plan. Internal medicine spans subspecialties like cardiology, nephrology, gastroenterology, endocrinology, and pulmonology. Ethical practice and professionalism are foundational throughout.
Topics at a Glance
| Topic | What You Will Learn |
|---|---|
| Introduction to Internal Medicine | What internists do, subspecialties, clinical reasoning, career paths |
| Diagnostic Procedures and Tests | Physical exam, blood tests, urinalysis, imaging, endoscopy, echocardiography |
| Medical Ethics and Professionalism | Autonomy, beneficence, non-maleficence, justice, confidentiality, ethical dilemmas |
Key Terms
| Term | Definition | Related Concept |
|---|---|---|
| Internal medicine | Medical specialty focused on adult disease prevention, diagnosis, and treatment | Primary care, subspecialties |
| Clinical reasoning | Systematic process of integrating history, exam, and test data to reach a diagnosis | Differential diagnosis |
| Internist | A physician specializing in internal medicine, often managing complex multi-system illness | Hospitalist, subspecialist |
| Subspecialty | A focused area within internal medicine (e.g., cardiology, nephrology) | Referral, consultation |
| Differential diagnosis | A ranked list of possible diagnoses that could explain a patient's presentation | Clinical reasoning |
| Preventive care | Interventions aimed at preventing disease before it develops (screenings, vaccinations) | Public health |
| Comorbidity | The presence of two or more chronic conditions in the same patient | Complexity, polypharmacy |
Related Topics
Prerequisites: Anatomy and Physiology, Pathophysiology, Clinical Skills
Related Topics: Family Medicine, Emergency Medicine, Pharmacology
Next Topics: Surgery, Pediatrics, Obstetrics and Gynecology