


Ask about associated symptoms: chest pain, palpitations, wheezing, or coughing. Response to activity, emotional state, and change of body position should be noted. The conditions in which dyspnea occurs should be ascertained. When did it begin? Has the onset been sudden or insidious? Inquire about the frequency and duration of attacks. Begin with a nonleading question: Do you have any difficulty breathing? If the response is affirmative and dyspnea is established as a problem, it should be characterized in detail. Platypnea refers to breathlessness that occurs in the upright position and is relieved with recumbency.Ī patient with dyspnea may say: "I feel short of breath," "I"m having difficulty breathing," "I can"t catch my breath," "I feel like I"m suffocating." Because it is a subjective phenomenon, the perception of dyspnea and its interpretation vary from patient to patient. Trepopnea is dyspnea that occurs in one lateral decubitus position as opposed to the other. Two uncommon types of breathlessness are trepopnea and platypnea. Paroxysmal nocturnal dyspnea (PND) is a sensation of shortness of breath that awakens the patient, often after 1 or 2 hours of sleep, and is usually relieved in the upright position. Orthopnea is the sensation of breathlessness in the recumbent position, relieved by sitting or standing. These conditions may not always be associated with dyspnea. Tachypnea is an increase in the respiratory rate above normal hyperventilation is increased minute ventilation relative to metabolic need, and hyperpnea is a disproportionate rise in minute ventilation relative to an increase in metabolic level. Dyspnea should be differentiated from tachypnea, hyperventilation, and hyperpnea, which refer to respiratory variations regardless of the patients" subjective sensations. Dyspnea on exertion (DOE) may occur normally, but is considered indicative of disease when it occurs at a level of activity that is usually well tolerated. It is a subjective experience perceived and reported by an affected patient. Dyspnea refers to the sensation of difficult or uncomfortable breathing.
