It is suggested that obstruction of upper respiratory tract by goiter and obstruction of small airways of COPD lead to combined disturbance of ventilation.

结果表明，甲状腺肿大引起的上呼吸道阻塞和COPD的小气道阻塞造成混合性通气障碍。

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It is suggested that obstruction of upper respiratory tract by goiter and obstruction of small airways of COPD lead to combined disturbance of ventilation.

结果表明，甲状腺肿大引起的上呼吸道阻塞和COPD的小气道阻塞造成混合性通气障碍。

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