呼吸困难(dyspnea)是临床常见而又重要的患者主诉症状,为一种主观感受,患者感觉空气不足而呼吸费劲,严重者可出现窒息的感觉,有时也可出现“胸闷”等变异的感觉。但一般也有客观的临床表现,如呼吸频率和节律的改变、呼吸时出现三凹征等。对于呼吸困难的诊断临床医生应结合患者的主客观依据予以正确的甄别。呼吸困难是临床常见症状,其中包含了一些可能致死的疾病,临床医生在接手呼吸困难的患者首先应 Difficulty breathing (dyspnea) is a common and important clinical symptoms of patients complained of, as a subjective feeling, the patient feels air shortness and breathlessness, severe may have the feeling of asphyxia, and sometimes “chest tightness” and other mutations feel. But generally there are objective clinical manifestations, such as changes in respiratory rate and rhythm, three concave signs of breathing appear. For the diagnosis of dyspnea clinicians should be based on the patient’s subjective and objective basis to be properly screened. Dyspnea is a common clinical symptom, which includes some possible lethal diseases, clinicians should take over the first breath of patients with dyspnea