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目的：研究重度肥胖对肺功能及运动试验中呼吸模式的影响。方法：４２名女性受试者，正常体重组２０名，重度肥胖组２２名，进行肺功能及功率车运动试验测定。结果：肥胖组补呼气量、功能残气量、残气量及肺总量均比对照组显著降低（Ｐ＜０．０５）。肥胖组静息状态、无氧阈状态和极量运动状态的氧耗量均比对照组显著增高（Ｐ＜０．０５），而公斤氧耗量均比对照组显著降低（Ｐ＜０．０１）。无氧阈状态和极量运动状态时，肥胖组的分钟通气量、呼吸频率、生理死腔与潮气量的比值以及氧的通气当量均高于对照组，而潮气量均小子对照组，差异有显著性（Ｐ〈０．０５）。结论：重度肥胖可使肺容量减少、运动中的组织供氧能力及胸壁顺应性、肺顺应性下降，呈现浅快呼吸模式。
OBJECTIVE: To study the effects of severe obesity on lung function and respiratory patterns in exercise tests. Methods: Forty-two female subjects, 20 normal weight group and 22 severe obesity group were enrolled in this study. Pulmonary function tests and motor car test were performed. Results: The obesity group had more expiratory volume, functional residual capacity, residual capacity and total lung volume than the control group (P <0.05). Oxygen consumption in resting state, anaerobic threshold state and extreme exercise state in obese group were significantly higher than those in control group (P <0.05), while the oxygen consumption in kg group was significantly lower than that in control group (P <0.01) ). The anaerobic threshold state and extreme exercise state, the obese group minute ventilation, respiratory rate, the ratio of physiological dead space and tidal volume and oxygen ventilation equivalent were higher than the control group, while the tidal volume of kidneys control group, the difference was Significance (P <0.05). Conclusion: Severe obesity can reduce the lung volume, exercise oxygen supply capacity and chest wall compliance, lung compliance decreased, showing shallow breathing mode.