국소적 기도폐쇄

(1) Blebs and Bullae

Blebs : Small collection of gas within visceral pleura
주로 lung apex (> 1 cm)
rupture → spontaneous pneumothorax
Bullae : Larger airspaces in the lung parenchyma (> 1cm diameter)
Causes :
· Chronic obstructive bronchitis
· Emphysema. diffuse
· 상기 질환 없이도 올 수 있다.
Clinical type
Type 1: Subpleural location in apex, narrowed neck
related paraseptal emphysema
Type 2: Superficial location, broad neck : spontaneous pneumothorax와 관계 Type 3: deep within the lung substances - Type 2와 비슷
exaggerated form of emphysema
Indications for bullectomy
ⅰ) markedly impaired
dyspnea
pneumothorax
infected bullae
ⅱ) large but localized bullae (> 1/3 of affected lung)
ⅲ) He dilution과 body plethysmography 로 FRC가 심한(e.g. up to 4L)
차이가 날 때

(2) Bronchogenic Cysts

site : · mediastinu…(생략)