其重点问题包括：导管材料的选择以及神经生长的微环境。
The key issues include: catheter material choice and the nerve-growth environment.
免疫抑制剂fk506的加入对导管材料的降解性能有一定的影响。
To the degradation characteristics of conduits, the immunosuppressive agent FK506 had definite influence.
强调选择合适浓度的肝素溶液封管、有效的皮肤消毒方法、棉质纱布的应用、导管材料的改进、合适的置管时间等的重要性。
It emphasized the importance of closing the tube with proper concentration of heparin, skin disinfection, cotton gauze, improvement of tube materials quality and the suitable indwelling time.
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