TAILIEUCHUNG - Medicine in critical care (Fifth edition): Part 2

(BQ) Continued part 1, part 2 of the document Medicine in critical care (Fifth edition) has contents: Infectious disease, cardiovascular disease and dysfunction, respiratory disorders, neurologic disease and dysfunction, gastrointestinal disease and dysfunction, renal disease and dysfunction, and other contents. Invite you to refer. | SECTION 9 INFECTIOUS DISEASE CHAPTER 82 The Febrile Patient PAUL E. MARIK INTRODUCTION Fever is a common problem in the intensive care unit ICU . A prospective observational study in a general ICU reported fever core temperature over C in 70 of patients caused equally by infective and noninfective processes 1 . In a large retrospective cohort study 24 204 ICU admissions Laupland et al. 2 reported that 44 of patients experienced a temperature higher than C during their ICU stay 17 of these patients had positive cultures. The discovery of fever in an ICU patient has significant impact on health care costs as blood cultures radiologic imaging and antibiotics routinely follow. It is therefore important to have a good understanding of the mechanisms and etiology of fever in ICU patients how and when to initiate a diagnostic workup and when initiation of antibiotics is indicated. The Society of Critical Care Medicine and the Infectious Disease Society of America considers a temperature of C or greater 101 F a fever in an ICU patient which warrants further evaluation 3 . This does not necessarily imply that a temperature below C 101 F does not require further investigation as many variables determine a patient s febrile response to an insult. In addition it should be recognized that there is a daily fluctuation of temperature by to C with women having wider variations in temperature than men. Furthermore with aging the maximal febrile response decreases by about C per decade. Accurate and reproducible measurement of body temperature is important in detecting disease and in monitoring patients with an elevated temperature. A variety of methods are used to measure body temperature combining different sites instruments and techniques 4 5 . Infrared ear thermometry has been demonstrated to provide values that are a few tenths of a degree below the temperature in the pulmonary artery and brain. Rectal temperatures obtained with a mercury .

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