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Internal medicine

life science Maturity 11-13 Next article →

Internal medicine is a medical specialty focused on adult healthcare. Doctors in this field work to prevent, diagnose, and treat diseases. The term "internal" refers to the treatment of diseases affecting the body's internal organs. In North America, these specialists are called internists. In Britain and many Commonwealth nations, they are known as physicians.

Seattle physician with patient 1999
Seattle physician with patient 1999

These doctors are essential for managing complex medical situations. They provide care for both hospitalized patients and those in outpatient clinics. This is because their patients are often seriously ill or require many medical tests.

Internists possess unique skills for managing multi-system disease processes. They are often called upon when symptoms are undifferentiated. An undifferentiated presentation means a patient has symptoms that do not clearly point to one specific organ. Examples include shortness of breath, fatigue, weight loss, or chest pain. They also manage patients with many chronic diseases at the same time. This is known as having complex comorbidities. While some doctors focus on just one organ, internists look at how many systems work together.

Seattle physician with patient 1999
Seattle physician with patient 1999

The history of internal medicine shows a shift in how doctors study the body. Its roots can be traced to ancient India and ancient China. The earliest texts are found in the Ayurvedic anthologies of Charaka. In the 17th century, Thomas Sydenham changed medicine through bedside observation. He is known as the father of English medicine. He focused on the natural history of diseases rather than dissecting bodies. Later, Giovanni Battista Morgagni became the father of anatomical pathology in the 18th century. In the 19th century, Robert Koch used laboratory investigations to advance the field.

Robert Koch
Robert Koch

Many American doctors studied in Germany during the early 20th century. They brought the term "internal medicine" to the United States from Germany.

Training to become an internist is a long and difficult process. It usually begins with four or five years of undergraduate education. In the United States, medical school then takes another four years. This means basic medical education can take eight years total. After medical school, doctors must complete supervised practice. This period is often called an internship or a foundation programme. In North America, this stage is called residency training. In most countries, residency for internal medicine lasts three years.

Seattle physician with patient 1999
Seattle physician with patient 1999

In the United Kingdom, the training path has specific names and stages. Doctors complete two years of foundation training first. They then move into Core Medical Training or Internal Medicine Training. After gaining Membership of the Royal College of Physicians, they commit to a specialty. In Commonwealth countries, trainees may be called senior house officers for four years. They can eventually advance to the registrar grade. This advancement usually requires competing for subspecialty training. This is different from the first years of training which involve yearly progress.

Many internists choose to focus on a specific area called a subspecialty. The American Board of Internal Medicine recognizes many different paths. For example, a cardiologist focuses on the heart and blood vessels. A gastroenterologist studies digestive diseases. An endocrinologist manages the endocrine system and its hormones. A nephrologist studies the function and diseases of the kidney.

Robert Koch
Robert Koch

Other specialists include hematologists, who study blood, and pulmonologists, who study the lungs. These experts provide deep knowledge for very specific medical needs.

It is important to distinguish internal medicine from family medicine. People often think they are the same, but they are different. Family medicine emerged during the primary care movement in the 1960s. Family doctors take a holistic approach to the entire family unit. They often work in outpatient settings and see patients of all ages. Internists focus strictly on adults and do not typically study pediatrics or obstetrics. They also do not focus on surgery. Internists emphasize diagnosis and managing complex, multi-system illnesses in adult patients.

Seattle physician with patient 1999
Seattle physician with patient 1999
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