英语语法分析

Conclusion: The antegrade or retrograde island flap could be designed by sural nerve and its nutrient vessels.

结论：以腓肠神经及其营养血管为蒂可设计切取顺行或逆行岛状皮瓣。

Intervention: Antegrade IM nail insertion with reaming of the femoral canal in either the supine or lateral position.

干预：采用仰卧位或侧卧位，股骨扩髓腔后顺行打入IM钉。

Case 14 In this case, both vessels have antegrade flow, but now the pulmonary artery is larger then the aorta (Figure 19).

病例14。本例中，两大血管血流方向正常，但是肺动脉较主动脉弓粗(图19)。