Hospital

A hospital is a health facility that provides diagnosis, treatment, and care for patients. It is staffed by doctors, nurses, pharmacists, and other technical personnel. What distinguishes a hospital from a smaller health clinic is its capacity to admit and observe patients for extended periods and to manage emergencies and complex conditions.

Hospitals may be operated by governments, non-governmental organizations, universities, or private companies. Financing systems vary by country: some rely on health insurance, while others depend on government budgets or direct payment by patients.

Common departments

A typical hospital has an emergency department, an outpatient clinic, hospital wards, maternal and child health services, pediatrics, and an intensive care unit (ICU) for critically ill patients. It also usually includes a laboratory, an imaging department (X-ray, ultrasound), and a pharmacy.

Levels of service

Most health systems organize hospitals into levels. Primary-level hospitals handle common conditions; district hospitals manage more complex cases; while specialized or university hospitals treat the most difficult cases and also train health students and conduct research. This system is called the referral system, through which patients are transferred from lower to higher levels of care.

History

Facilities for patient care existed in earlier civilizations, including in India, Greece, and the eastern Mediterranean. During the Islamic medieval period, institutions known as bimaristan existed in cities such as Baghdad, Damascus, and Cairo, with various departments and salaried staff. The modern hospital, built on principles of sanitation, microbiology, and anesthesia, developed during the nineteenth and twentieth centuries.