Intensive care unit

An intensive care unit (ICU) is a specialized hospital department designed for life-saving medical intervention. It is also known by several other names, such as an intensive therapy unit (ITU) or a critical care unit (CCU). These units provide an organized system of specialized medical and nursing care for patients who are critically ill. The primary goal is to provide physiologic organ support to sustain life. This support is necessary when a patient suffers from life-threatening organ system insufficiency. Patients may arrive in an ICU directly from an emergency department. They might also be transferred from a hospital ward if they rapidly deteriorate. Sometimes, they are sent to the ICU immediately following very invasive surgeries to prevent complications.

To support a failing body, the ICU uses a complex array of medical technology. One essential tool is the mechanical ventilator, which assists a patient with breathing. This machine works by moving air through an endotracheal tube or a tracheostomy tube.

Doctors also use cardiac monitors to track heart conditions constantly. A wide web of intravenous lines, feeding tubes, and catheters allows for the precise delivery of fluids and nutrition. Other tools include suction pumps, syringe pumps, and various drains. For patients with severe organ failure, specialized machines like continuous dialysis or an intra-aortic balloon pump may be used. In extreme cases, doctors may use extracorporeal membrane oxygenation (ECMO) to support the heart and lungs.

Because different patients have different needs, hospitals often maintain specialized types of ICUs. A neonatal intensive care unit (NICU) provides care for newborn babies who have not yet left the hospital.

These infants may suffer from prematurity or congenital disorders. Pediatric intensive care units (PICUs) serve children with life-threatening conditions like asthma or traumatic injury. For patients with heart issues, a coronary care unit manages conditions like a myocardial infarction, which is a heart attack. Neurological intensive care units focus on brain and spinal injuries, such as strokes or tumors.

There are even specialized units for the elderly, known as geriatric intensive care units, and isolation units for contagious diseases.

The history of intensive care shows how medical science has evolved to save more lives. In 1854, Florence Nightingale worked during the Crimean War. She introduced clean environments, clean water, and medical equipment to treat wounded soldiers. Her interventions helped the mortality rate drop from 60% to 2.2%. In the United States, Dwight Harken opened the first ICU in 1951. Later, in 1955, William Mosenthal opened an early unit at the Dartmouth-Hitchcock Medical Center. In 1953, Bjørn Aage Ibsen established the first global ICU in Copenhagen. He created this unit to manage patients during a polio epidemic who required constant ventilation.

Nursing care is a vital component of the quality of care in these units. Nurses are the largest group of healthcare professionals working in the ICU. Because patients are so unstable, the ratio of staff to patients is much higher than in regular hospital wards. In many places, a ratio of two patients to one nurse is recommended for a medical ICU. In countries like Australia and the United Kingdom, some patients receive a 1:1 ratio. This level of care is necessary for patients on multiple vasoactive medications to maintain blood pressure. Higher staffing levels have been significantly associated with lower mortality rates in hospitals.

Modern technology has also introduced remote collaboration through telemedicine. Some hospitals use teleconferencing systems to create what is known as a virtual ICU or eICU.

This allows remote doctors and nurses to see live vital signs and electronic health records. These remote teams can collaborate with on-site staff to ensure correct procedures are followed. This system is especially helpful for patients in rural locations or those who might need transfer to a larger facility. It provides a broader view of a patient's medical history during critical moments.

Operating an ICU is a massive logistical and financial undertaking. In the United States, intensive care beds can account for up to 20% of all hospital beds. In contrast, the United Kingdom uses them for only about 2% of total beds, as they admit only the most severely ill. These services are also very expensive to provide. In the United States, hospital stays involving ICU services can cost 2.5 times more than other stays. In the United Kingdom, the daily costs vary by the type of unit. For example, an adult ICU cost approximately £1,328 per bed per day in 2003–04. A neonatal unit cost £838, while a pediatric unit cost £1,702 per bed per day.