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Pyrexia - PACT - ESICM

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Task 1. Assessing and measuring fever in ICU<br />

Stavem K, Saxholm H, Smith-Erichsen N. Accuracy of infrared ear thermometry<br />

in adult patients. Intensive Care Med 1997; 23(1): 100–105. PMID<br />

9037647<br />

Giuliano KK, Scott SS, Elliot S, Giuliano AJ. Temperature measurement in<br />

critically ill orally intubated adults: a comparison of pulmonary artery<br />

core, tympanic, and oral methods. Crit Care Med 1999; 27(10): 2188–<br />

2193. PMID 10548205<br />

Bridges E, Thomas K. Noninvasive measurement of body temperature in critically<br />

ill patients. Crit Care Nurse 2009; 29(3): 94–97. PMID 19487784<br />

An 86-year-old lady with multiple trauma receiving mechanical<br />

ventilation for two weeks develops fever (green line, °C), without tachycardia<br />

(blue line, b/min). The recording is from the bedside computer monitor,<br />

visualising continuous measurements (vertical lines are days). There is a diurnal<br />

pattern. The diagnosis made was ventilator-associated pneumonia attributable<br />

to Pseudomonas aeruginosa. The blue arrow indicates the day of starting<br />

piperacillin and tobramycin, and the ‘lytic’ resolution of the fever is illustrated.<br />

Heart rate b/min<br />

Body temperature C<br />

Laboratory appraisal<br />

The clinical assessment is supplemented by selected laboratory measurements.<br />

The commonest of these is the leukocyte and differential counts as signs of<br />

infection include leukocytosis and a ‘left shift’. Investigators have searched for<br />

specific ‘sepsis’ markers including circulating C-reactive protein, procalcitonin<br />

and the cytokine, interleukin-6. Although the exact predictive values remain<br />

uncertain, some of these plasma factors can help to forecast the likelihood of<br />

microbial infection in a patient with fever, before the results of Gram stains, and<br />

particularly microbiological cultures, are available. On day six after trauma or<br />

surgery, development of fever and persistently high circulating IL-6 and C-<br />

reactive protein levels may be predictive for nosocomial infection. Similarly, the<br />

detection of endotoxaemia by means of rapid assay techniques may be of some<br />

predictive value in Gram-negative infection/bacteraemia and its associated<br />

morbidity.<br />

The following papers address the (limited) value of surrogate indicators of<br />

microbial infection.<br />

[8]

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