对于主流型二氧化碳分析仪，位于通气接头的测量盒可能会变脏或被损坏，导致错误的或吸入二氧化碳值。
With mainstream capnographs, the measuring chamber in the airway adaptor can become dirty or damaged, leading to erroneous end-tidal or inspired carbon dioxide values.
随后采用数字图像处理的方法，将原图像转换为二值图，并使用计盒维数的方法对图像进行了分形分析。
The original pictures were converted into binary images, and fractal analysis was performed with the box-counting dimension.
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