氨溴索干预组的肺动脉平滑肌细胞和细胞外基质的病变明显轻于低氧组，管壁面积占总面积的百分比和管壁厚度占外径的百分比明显低于低氧组（P <0 0 1）。

PAPM in AP group is significantly lower than that of CIH group ( P< 0.01); The damage of pulmonary artery smooth muscle cells and extra cell matrix of AP group is much slighter than that of CIH group.

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用数字钻孔摄像孔壁展开图上破碎区域面积占图像总面积的百分比可定量描述破碎程度。

The quantitative description of fractured zone with borehole wall unrolled images was studied; it is indicated that the percentage of image area is also applicable for fractured zone grading.

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