unending subclassifications of tumors and morphologic grading have generally proved to be a sterile pathologic exercise . 對腫瘤進行無止境的分類和形態(tài)學(xué)分級證明都是一種毫無效果的病理學(xué)活動。
several subclassifications have been proposed : simple chronic bronchitis describes a condition characterized by mucoid sputum production; chronic mucopurulent bronchitis is characterized by persistent or recurrent purulence of sputum in the absence of localized suppurative diseases such as bronchiectasis; chronic bronchitis with obstruction deserves a separate classification characterized by presence of airway obstruction as assessed by the used of the forced expiratory vital capacity maneuver; and chronic asthmatic bronchitis 它可以分為以下幾種類型:單純性慢性支氣管炎,其特征為咳粘液性痰;慢性粘液膿性支氣管炎,其特征是反復(fù)的或持續(xù)的咳膿痰,但肺部并無化膿性病變,如支氣管擴張;慢性支氣管炎伴阻塞,其特征為用力呼氣肺活量測定時有氣道阻塞的表現(xiàn);慢性哮喘性支氣管炎,其特征是患者有長期的咳嗽及咯痰史,后來肺部出現(xiàn)哮鳴者,因此與哮喘伴慢性氣管阻塞的病人不同。