Synthesis and characterization of polyurethane

Polyurethane was synthesized by the copolymerization with isocyanate and diols. The structure and properties of the copolymers were characterized by infrared spectrometer (IR), differential scanning calorimetry (DSC) and thermogravimetry (TG). The rabbit blood samples was dripped on the polyurethane, which was prepared by drying and die, and the contact angle was measured by contact angle measurement, then infiltration phenomenon was observed by electron microscopy. The results showed that the contact angle of blood samples and polyurethane was decreased with increasing time, and the platelets on the polyurethane would gradually increase and more rules. Thus the polyurethane coating had good hydrophilic property and anticoagulant activity.     

椎体成形术在椎体压缩骨折并发神经痛的临床应用

【摘要】 目的 探讨经皮椎体成形术（PVP）在椎体压缩性骨折伴相应节段神经根性疼痛的临床疗效。方法 回顾性分析2017年1月至2018年12月,收治的椎体压缩骨折并神经痛患者47例,所有患者在药物止痛、抗骨质疏松治疗基础上,予以PVP治疗。观察手术前和手术后1 d、1周、1个月采用视觉模拟评分（VAS）、功能障碍指数（ODI）、PD- Q量表评分,观察不良反应。结果 与术前相比,术后患者VAS评分、ODI、PD- Q量表评分较术前均下降,差异有统计学意义。结论 PVP不仅能部分恢复椎体压缩骨折的高度,缓解腰背痛,对伴有神经根性疼痛的患者也能缓解疼痛。