Abstract
Pulmonary complications are common in hematological patients, particularly those receiving a hematological stem cell transplant (HSCT), and a significant percentage of them will require intensive care unit (ICU) admission. Acute respiratory failure in these patients is a threatening event, with a very poor outcome, particularly when mechanical ventilation (MV) is required. For many years, oncologists and intensivists had a pessimistic vision of the dismal outcome of those hematological patients requiring admission to the ICU. The bleak experience in this population led some authors to suggest early withdrawal of support, or even withholding the option of mechanical ventilation altogether. However, over the last years this vision seems to be changing. Great progress has been made in stem cell transplantation that can be ascribed to a better understanding of the human leukocyte antigen (HLA) system for donor selection, more effective and less toxic immunosupression for prevention and treatment of graft-versus host disease (GVHD), and significant advances in infectious disease therapy. Also improvements in ventilatory and supportive care, such as the early implantation of noninvasive ventilation (NIV), may avoid intubation in a significant percentage of patients suffering from acute respiratory failure. As a result of all this, the proportion of both hematological patients requiring management in the ICU and those requiring MV is decreasing. Also the survival rate of HSCT recipients admitted to the ICU has been steadily improving. In this chapter we will report on the epidemiology of acute respiratory failure in patients with hematological malignancies.
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