Longcompliantie met volume-druk curves

Longcompliantie
Lung compliance Chest wall compliance

Increased lung compliance Increased chest wall complance


● Lung surfactant ● Ehler-Dahlos syndrome and
● Lung volume: compliance is at other connective tissue
its highest at FRC diseases associated with
● Posture (supine, upright) increased connective tissue
● Loss of lung conective tissue elasticity
associated with age ● Rib resection
● Emphysema ● Cachexia
● Flail segment rib fractures
● Open chest (eg clamshell)

Decreased static lung compliance Decreased chest wall compliance


● Loss of surfactant (eg. ARDS) ● Structural abnormalities
● Decreased lung elasticity ○ Kyphosis / scoliosis
○ Pulmonary fibrosis ○ Pectus excavatum
○ Pulmonary oedema ○ Circumferential
● Decreased functional lung burns
volume ○ Surgical rib fixation
○ Pneumonectomy or ● Functional abnormalities
lobectomy ○ Muscle spasm, eg.
○ Pneumonia seizure or tetanus
○ Atelectasis ● Extrathoracic influences on
○ Small stature chest/diaphragmatic excursion
● Alveolar derecruitment ○ Obesity
● Alveolar overdistension ○ Abdominal
compartment
Decreased dynamic lung compliance syndrome
○ Prone position

● Increased airway resistance (eg.
asthma)
● Increased air flow (increased
resp rate)