• R L Holliday and P J Doris.
• Can Med Assoc J. 1979 Oct 6; 121 (7): 931-6.

AbstractCritically ill surgical patients account for approximately half the patients in an active multidisciplinary critical care unit. Hypovolemia and sepsis are common in such patients and affect a number of organ systems. Monitoring these systems provides therapeutically relevant information that may decrease morbidity and improve patient survival. Circulatory hemodynamics may be assessed by direct measurement of the arterial blood pressure, central venous and pulmonary artery pressure monitoring and cardiac output determination; the data thus obtained are valuable in guiding fluid replacement in the hypovolemic individual. The respiratory status may be assessed by bedside spirometry and measurement of arterial blood gas tensions to gauge pulmonary function and the need for assisted ventilation. Renal dysfunction is common in such patients; careful analysis of both urine and blood may identify prerenal as opposed to renal and postrenal factors. Monitoring of the gastrointestinal tract, especially for hemorrhage, is important. Finally, careful attention to nutritional status and provision of adequate protein and energy intake by mouth or by vein is a vital component of the optimal care of these patients.

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