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ICU patients may require mechanical ventilation if they have lost the ability to breathe normally.
An intensive care unit (ICU), also known as a critical care unit (CCU), intensive therapy unit or intensive treatment unit (ITU), is a special department of a hospital or health care facility that provides intensive care medicine.
Intensive care units cater to patients with the most severe and life-threatening illnesses and injuries, which require constant, close monitoring and support from specialist equipment and medication in order to ensure normal bodily functions. They are staffed by highly trained doctors and critical care nurses who specialise in caring for seriously ill patients. Common conditions that are treated within ICUs include trauma, multiple organ failure and sepsis.[1]
Patients may be transferred directly to an intensive care unit from an emergency department if required, or from a ward if they rapidly deteriorate, or immediately after surgery if the surgery is very invasive and the patient is at high risk of complications.[2]
Contents
- 1 History
- 2 Specialities
- 3 Equipment and systems
- 4 Quality of care
- 5 Operational logistics
- 6 See also
- 7 References
- 8 External links
History
See also: Intensive care medicine
In 1854, Florence Nightingale left for a Crimean War, where triage, used to separate seriously wounded soldiers from the less-seriously wounded, was observed. Until recently, it was reported that Nightingale reduced mortality from 40% to 2% on the battlefield. Although this was not the case, her experiences during the war formed the foundation for her later discovery of the importance of sanitary conditions in hospitals, a critical component of intensive care. In 1950, anesthesiologist Peter Safar established the concept of "Advanced Support of Life", keeping patients sedated and ventilated in an intensive care environment. Safar is considered to be the first practitioner of intensive care medicine as a speciality. In response to a polio epidemic (where many patients required constant ventilation and surveillance), Bjørn Aage Ibsen established the first intensive care unit in Copenhagen in 1953.[3][4][5] The first application of this idea in the United States was in 1955 by Dr. William Mosenthal, a surgeon at the Dartmouth-Hitchcock Medical Center.[6] In the 1960s, the importance of cardiac arrhythmias as a source of morbidity and mortality in myocardial infarctions (heart attacks) was recognized. This led to the routine use of cardiac monitoring in ICUs, especially after heart attacks.[7]
Specialities
ICU Nurse attending to a patient in Baghdad, Iraq.
ICU nurses monitoring patients from a central computer station. This allows for rapid intervention should a patients condition deteriorate whilst a member of staff is not immediately at the bedside.
Nurses in a neonatial intensive care unit (NICU)
Hospitals may have ICUs that cater to a specific medical speciality or patient, such as those listed below:
- Neonatal intensive care unit (NICU)
- Pediatric intensive care unit (PICU)
- Psychiatric intensive care unit (PICU)
- Cardiovascular intensive care unit (CVICU)
- Coronary care unit (CCU): Also known as Cardiac Intensive Care Unit (CICU)
- Post-anesthesia care unit (PACU): Also known as the post-operative recovery unit, or recovery room, the PACU provides immediate post-op observation and stabilisation of patients following surgical operations and anesthesia. Patients are usually held in such facilities for a limited amount of time, and must meet a set physiological criteria before transfer back to a ward with a qualified nurse escort takes place. Due to high patient flow in recovery units, and owing to the bed management cycle, if a patient breaches a time frame and is too unstable to be transferred back to a ward, they are normally transferred to a high dependency unit (HDU) or post-operative critical care unit (POCCU) for closer observation.
- High dependency unit (HDU): Many hospitals have a transitional high dependency unit (HDU) for patients who require close observation, treatment and nursing care that cannot be provided on a general ward, but whose care is not at a critical enough level to warrant an ICU bed. These units are also called step-down, progressive and intensive recovery units and are utilised until a patient's conditions stabilises enough to qualify them for discharge to a general ward.[8]
- Surgical Intensive Care Unit (SICU): A specialized service in larger hospitals that provides inpatient care for critically ill patients on surgical services. As opposed to other ICUs, the care is managed by surgeons trained in critical-care/trauma.
Out of Hospital ICU
- Mobile Intensive Care Unit (MICU)
A specialized ambulance staffed by Paramedics.
Equipment and systems
Clinicians in an intensive care unit
Common equipment in an ICU includes mechanical ventilators to assist breathing through an endotracheal tube or a tracheotomy; cardiac monitors including those with telemetry; external pacemakers; defibrillators; dialysis equipment for renal problems; equipment for the constant monitoring of bodily functions; a web of intravenous lines, feeding tubes, nasogastric tubes, suction pumps, drains, and catheters; and a wide array of drugs to treat the primary condition(s) of hospitalization. Medically induced comas, analgesics, and induced sedation are common ICU tools needed and used to reduce pain and prevent secondary infections. Bed Head Unit/Panel, Medical Rail System also called as Wall Utilizer.
Quality of care
The available data suggests a relation between ICU volume and quality of care for mechanically ventilated patients.[9] After adjustment for severity of illnesses, demographic variables, and characteristics of different ICUs (including staffing by intensivists), higher ICU staffing was significantly associated with lower ICU and hospital mortality rates. A ratio of 2 patients to 1 nurse is recommended for a medical ICU, which contrasts to the ratio of 4:1 or 5:1 typically seen on medical floors. This varies from country to country, though; e.g., in Australia and the United Kingdom most ICUs are staffed on a 2:1 basis (for High-Dependency patients who require closer monitoring or more intensive treatment than a hospital ward can offer) or on a 1:1 basis for patients requiring very intensive support and monitoring; for example, a patient on a mechanical ventilator with associated anaesthetics or sedation such as propofol, Midazolam and use of strong analgesics such as morphine, fentanyl and/or remifentanil.
Operational logistics
In the United States, up to 20% of hospital beds can be labelled as intensive-care beds; in the United Kingdom, intensive care usually will comprise only up to 2% of total beds. This high disparity is attributed to admission of patients in the UK only when considered the most severely ill.[10]
Intensive care is an expensive healthcare service. In the United Kingdom, the average cost of funding an intensive care unit is:[11]
- £838 per bed per day for a neonatal intensive care unit
- £1,702 per bed per day for a paediatric intensive care unit
- £1,328 per bed per day for an adult intensive care unit
See also
- ICU quality and management tools
- Intensive Care Foundation, a charity in Australia and New Zealand
- Geriatric Intensive care unit
References
- ^ "What is Intensive Care?". London: Intensive Care Society. 2011. Retrieved 2013-05-25.
- ^ Smith, S. E. (2013-03-24). "What is an ICU". wiseGEEK. Bronwyn Harris, ed. Sparks, Nevada: Conjecture Corporation. Retrieved 2012-06-15.
- ^ Takrouri, M.S.M. (2004). "Intensive Care Unit". Internet Journal of Health (Sugar Land, Texas: Internet Scientific Publications) 3 (2). doi:10.5580/1c97. ISSN 1528-8315. OCLC 43535892. Retrieved 2007-08-25.
- ^ Reisner-Sénélar, L. (2009), "Der dänische Anästhesist Björn Ibsen ein Pionier der Langzeitbeatmung über die oberen Luftwege", Doctoral Thesis (in German) (Frankfurt am Main, Germany: Johann Wolfgang Goethe University), OCLC 600186486 . Translation of introduction available here.
- ^ Reisner-Sénélar, L. (2009). "The Danish anaesthesiologist Björn Ibsen a pioneer of long-term ventilation on the upper airways". [dead link]
- ^ Grossman, D.C. (Spring 2004). "Vital Signs: Remembering Dr. William Mosenthal: A simple idea from a special surgeon". Dartmouth Medicine (Dartmouth College, Geisel School of Medicine) 28 (3). Retrieved 2007-04-10.
- ^ "História da Terapia Intensiva" [Intensive Care History] (video in English linked to from website). Sociedade Brasileira de Terapia Intensiva (Brazilian Society of Critical Care) website English version. Produced by Tfran Ediçao de Imagens. Uploaded to YouTube by user: Thiago Francisco. 2008-06-06.
- ^ "Intensive Care Patients Experiences: High Dependency Units" (compiled patient testimonials), healthtalkonline.org (Oxford, England: DIPEx), November 2012
- ^ Kahn, J.M.; Goss, C.H.; Heagerty, P.J.; Kramer, A.A. et al. (2006-07-06). "Hospital volume and the outcomes of mechanical ventilation". New England Journal of Medicine 355 (1): 41–50. doi:10.1056/NEJMsa053993. PMID 16822995.
- ^ Bennett, D.; Bion, J. (1999). "Organisation of intensive care". BMJ (Clinical research ed.) 318 (7196): 1468–70. doi:10.1136/bmj.318.7196.1468. PMC 1115845. PMID 10346777.
- ^ Winterton, R. (2005-06-15), "Written Answers text: Trent Strategic Health Authority", Hansard - House of Commons Debates (Westminister, England: Stationery Office, Parliament), Volume 435, part 87, column 520W.
External links
- "Intensive Care". NHS choices. UK: National Health Service.
- "Critical Care". MedlinePlus. US: National Library of Medicine, National Institutes of Health.
- Society of Critical Care Medicine
- ICUsteps - Intensive care patient support charity
- Organisation for Critical Care Transportation
- Reynolds, H.N.; Rogove, H.; Bander, J.; McCambridge, M. et al. (December 2011). "A working lexicon for the tele-intensive care unit: We need to define tele-intensive care unit to grow and understand it". Telemedicine and e-Health. 17 (10): 773–783. doi:10.1089/tmj.2011.0045.
- Olson, Terrah J. Paul; Brasel, Karen J.; Redmann, Andrew J.; Alexander, G. Caleb; Schwarze, Margaret L. (January 2013). "Surgeon-Reported Conflict With Intensivists About Postoperative Goals of Care". JAMA Surgery 148 (1): 29–35. doi:10.1001/jamasurgery.2013.403.
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Intensive care medicine
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- Health science
- Medicine
- Medical specialities
- Respiratory therapy
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| General terms |
- Intensive care unit (ICU)
- Neonatal intensive care unit (NICU)
- Pediatric intensive care unit (PICU)
- Coronary care unit (CCU)
- Critical illness insurance
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| Conditions |
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Organ system failure
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- Shock sequence
- SIRS
- Sepsis
- Severe sepsis
- Septic shock
- Other shock
- Cardiogenic shock
- Distributive shock
- Organ failure
- Acute renal failure
- Acute respiratory distress syndrome
- Acute liver failure
- Respiratory failure
- Multiple organ dysfunction syndrome
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Complications
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- Critical illness polyneuropathy / myopathy
- Critical illness–related corticosteroid insufficiency
- Decubitus ulcers
- Fungemia
- Stress hyperglycemia
- Stress ulcer
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Iatrogenesis
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- Methicillin-resistant Staphylococcus aureus
- Oxygen toxicity
- Refeeding syndrome
- Ventilator-associated lung injury
- Ventilator-associated pneumonia
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| Diagnosis |
- Arterial blood gas
- Catheter
- Arterial catheter
- Central venous catheter
- Pulmonary artery catheter
- Blood cultures
- Screening cultures
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| Life supporting treatments |
- Airway management
- Chest tube
- Dialysis
- Enteral feeding
- Goal-directed therapy
- Induced coma
- Mechanical ventilation
- Therapeutic hypothermia
- Total parenteral nutrition
- Tracheal intubation
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| Drugs |
- Analgesics
- Antibiotics
- Antithrombotics
- Inotropes
- Intravenous fluids
- Neuromuscular-blocking drugs
- Recombinant activated protein C
- Sedatives
- Stress ulcer prevention drugs
- Vasopressors
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| ICU scoring systems |
- APACHE II
- Glasgow Coma Scale
- PIM2
- SAPS II
- SAPS III
- SOFA
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| Organisations |
- Society of Critical Care Medicine
- Surviving Sepsis Campaign
- European Society of Paediatric and Neonatal Intensive Care
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| Related specialties |
- Anesthesia
- Cardiology
- Internal medicine
- Neurology
- Pediatrics
- Pulmonology
- Surgery
- Traumatology
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