目的:探究B超下留置带球囊的引流管在乳腺微创旋切术中的应用效果。方法:选择2021年1月—2023年1月在潮州市人民医院行乳腺微创旋切术患者160例,按照随机数表法分为观察组及对照组,各80例。对照组采用常规引流管引流,观察组采用带球囊...目的:探究B超下留置带球囊的引流管在乳腺微创旋切术中的应用效果。方法:选择2021年1月—2023年1月在潮州市人民医院行乳腺微创旋切术患者160例,按照随机数表法分为观察组及对照组,各80例。对照组采用常规引流管引流,观察组采用带球囊的引流管引流。比较两组手术时间、疼痛评分[视觉模拟评分法(VAS)评分]、瘢痕长度、残腔内积液、瘀斑面积,记录两组术后并发症发生情况及满意率。结果:两组手术时间、术后48 h VAS评分比较,差异无统计学意义(P>0.05)。两组瘢痕长度比较,差异无统计学意义(P>0.05),而观察组的残腔内积液少于对照组,瘀斑面积小于对照组,差异有统计学意义(P<0.05)。观察组并发症发生率为1.25%,低于对照组的8.75%,差异有统计学意义(P<0.05)。观察组总满意率为97.50%,高于对照组的87.50%,差异有统计学意义(P<0.05)。结论:B超下留置带球囊的引流管有助于乳腺微创旋切术患者术后恢复,可减少并发症的发生,满意度较高。展开更多
On polyhydroxybutyrate banded spherulites, concentric rings were observed between cross polarizers or without polarizers. The rings used to be considered as cracks. In this paper, we provide evidences to distinguish t...On polyhydroxybutyrate banded spherulites, concentric rings were observed between cross polarizers or without polarizers. The rings used to be considered as cracks. In this paper, we provide evidences to distinguish the concentric rings from cracks observed on PHB spherulites. Furthermore, atomic force microscopy confirmed that these concentric rings with varying spacing were growth terraces rather than cracks. The height of the terraces reached up to several hundred nanometers. It was observed that the external terraces were higher than the internal terraces, which was proposed to result from layer by layer growth. This is the first report on the new microscopic feature of polyhydroxybutyrate spherulites. Spherulites with birefringent bands, wavy fluctuation of height were also observed.展开更多
Phase behavior in blends of liquid crystalline poly(aryl ether ketone) (C-PAEK) and poly(aryl(ether) ketone) containing 4-methyl phenyl groups(T-PAEK) was investigated by differential scanning calorimetry(DSC),polariz...Phase behavior in blends of liquid crystalline poly(aryl ether ketone) (C-PAEK) and poly(aryl(ether) ketone) containing 4-methyl phenyl groups(T-PAEK) was investigated by differential scanning calorimetry(DSC),polarized light microscopy(PLM) and atomic force microscopy(AFM) techniques.In both(C-PAEK-rich) and T-PAEK-rich blends,the two components are molecular miscible in the melting state.For the 80/20 C-PAEK/T-PAEK blend,the bright core and rings are mainly composed of C-PAEK phase and dark rings consist of T-PAEK phase in the ring-banded spherulites.The development of the ring-banded spherulites in the C-PAEK/T-PAEK blends is a rhythmic growth process,and thus it is consistent with the structural discontinuity model proposed by Padden and Keith based on polyethylene spherulites.展开更多
文摘目的:探究B超下留置带球囊的引流管在乳腺微创旋切术中的应用效果。方法:选择2021年1月—2023年1月在潮州市人民医院行乳腺微创旋切术患者160例,按照随机数表法分为观察组及对照组,各80例。对照组采用常规引流管引流,观察组采用带球囊的引流管引流。比较两组手术时间、疼痛评分[视觉模拟评分法(VAS)评分]、瘢痕长度、残腔内积液、瘀斑面积,记录两组术后并发症发生情况及满意率。结果:两组手术时间、术后48 h VAS评分比较,差异无统计学意义(P>0.05)。两组瘢痕长度比较,差异无统计学意义(P>0.05),而观察组的残腔内积液少于对照组,瘀斑面积小于对照组,差异有统计学意义(P<0.05)。观察组并发症发生率为1.25%,低于对照组的8.75%,差异有统计学意义(P<0.05)。观察组总满意率为97.50%,高于对照组的87.50%,差异有统计学意义(P<0.05)。结论:B超下留置带球囊的引流管有助于乳腺微创旋切术患者术后恢复,可减少并发症的发生,满意度较高。
文摘On polyhydroxybutyrate banded spherulites, concentric rings were observed between cross polarizers or without polarizers. The rings used to be considered as cracks. In this paper, we provide evidences to distinguish the concentric rings from cracks observed on PHB spherulites. Furthermore, atomic force microscopy confirmed that these concentric rings with varying spacing were growth terraces rather than cracks. The height of the terraces reached up to several hundred nanometers. It was observed that the external terraces were higher than the internal terraces, which was proposed to result from layer by layer growth. This is the first report on the new microscopic feature of polyhydroxybutyrate spherulites. Spherulites with birefringent bands, wavy fluctuation of height were also observed.
文摘Phase behavior in blends of liquid crystalline poly(aryl ether ketone) (C-PAEK) and poly(aryl(ether) ketone) containing 4-methyl phenyl groups(T-PAEK) was investigated by differential scanning calorimetry(DSC),polarized light microscopy(PLM) and atomic force microscopy(AFM) techniques.In both(C-PAEK-rich) and T-PAEK-rich blends,the two components are molecular miscible in the melting state.For the 80/20 C-PAEK/T-PAEK blend,the bright core and rings are mainly composed of C-PAEK phase and dark rings consist of T-PAEK phase in the ring-banded spherulites.The development of the ring-banded spherulites in the C-PAEK/T-PAEK blends is a rhythmic growth process,and thus it is consistent with the structural discontinuity model proposed by Padden and Keith based on polyethylene spherulites.
