Dyspnea is a common symptom in patients with acute and chronic critical illness as well as in patients receiving palliative care. While dyspnea can be found in a variety of clinical arenas and across many specialties, the mechanisms that cause dyspnea are similar. Although not often the cause for admission to critical care, it may complicate and extend length of stay. This article defines and describes dyspnea and its pathophysiology. Critical care nurses should strive to implement interventions supported by evidence whenever possible. An evidence-based plan of care for the assessment, planning, intervention, and evaluation of the patient with dyspnea is outlined, using levels of recommendation based on the strength of available evidence. Two case studies are presented to illustrate its application to clinical practice.

Dyspnea is a multidimensional, subjective perception of breathing difficulty commonly seen in patients who are critically or terminally ill. Understanding the mechanisms and assessment of dyspnea will help nurses in advanced practice roles to successfully manage these patients. Major mechanisms of dyspnea include stimulation of the chemoreceptors, stimulation of chest wall and intrapulmonary receptors, and increased sense of effort (also termed increased respiratory motor command). The causes of dyspnea are multifactorial, including numerous clinical conditions and aggravating situations that promote dyspnea. Assessment of dyspnea includes an accurate history of timing, precipitating factors, associated symptoms, alleviating factors, intensity and quality of the symptom. Measurement tools for dyspnea include both unidimensional and multidimensional tools, as well as tools that measure changes in the perception of dyspnea. Most tools have been tested for reliability and validity on healthy subjects or on patients with chronic obstructive pulmonary disease and, therefore, should be used with caution in critically or terminally ill patients.