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REDUCED GAS TRANSFER |
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conditions affecting lung parenchyma: (restrictive lung defect on spirometry) |
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infiltrative conditions, eg. lymphangitis carcinomatosasarcoidosis connective tissue diseases (pneumonitis)fibrosing alveolitis / lung fibrosis |
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decreased lung capillary bed: |
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pulmonary embolism emphysema pulmonary hypertension |
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ventilation-perfusion mismatch or shunts: |
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pulmonary oedema pneumonia pulmonary arteriovenous fistulas |
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decreased oxygen-carrying capacity of blood: |
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anaemia |
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