目的:探讨应用上腔静脉滤器对肿瘤合并上肢深静脉血栓形成患者预防肺栓塞发生的安全性和有效性。方法:回顾性分析20例上肢深静脉血栓形成患者资料。20例患者中肺癌6例,胃癌4例,乳腺癌2例,卵巢癌、胰腺癌、鼻咽癌、白血病、恶性淋巴瘤、...目的:探讨应用上腔静脉滤器对肿瘤合并上肢深静脉血栓形成患者预防肺栓塞发生的安全性和有效性。方法:回顾性分析20例上肢深静脉血栓形成患者资料。20例患者中肺癌6例,胃癌4例,乳腺癌2例,卵巢癌、胰腺癌、鼻咽癌、白血病、恶性淋巴瘤、食管癌、贲门癌、胸腺瘤术后左颈部转移各1例。其中9例患者行PICC(Peripheral inserted central catheter)置管化疗,2例行锁骨下静脉置管化疗。结果:全部患者均成功置入上腔静脉滤器,保留深静脉置管的患者术后成功拔除深静脉导管,无手术相关并发症发生,随访6~24个月,术后无症状性肺栓塞、上腔静脉穿孔、滤器移位及上腔静脉综合征发生。结论:恶性肿瘤及深静脉置管是上肢深静脉血栓形成最重要的原因,上腔静脉滤器置入是预防肿瘤合并上肢深静脉血栓形成患者发生肺栓塞的一种安全和有效的措施。展开更多
目的探讨TASC(Ⅱ)D型股动脉闭塞的腔内治疗方法及效果。方法回顾性分析2012年1月—2013年5月采用腔内治疗TASC(Ⅱ)D型股浅动脉闭塞26例(26肢)患者的临床资料。其中采用球囊扩张内支架置入13例(裸支架组,共植入支架31枚)、Silverhawk斑...目的探讨TASC(Ⅱ)D型股动脉闭塞的腔内治疗方法及效果。方法回顾性分析2012年1月—2013年5月采用腔内治疗TASC(Ⅱ)D型股浅动脉闭塞26例(26肢)患者的临床资料。其中采用球囊扩张内支架置入13例(裸支架组,共植入支架31枚)、Silverhawk斑块旋切6例(Silverhawk斑块旋切组)、Viabahn覆膜支架2例(Viabahn覆膜支架组)。腔内手术未成功通过病变者5例给予前列地尔等扩血管药物治疗。通过手术前后踝肱指数(ABI)、螺旋CT血管成像(CTA)、数字减影血管造影(DSA)及症状改善情况来评价疗效;并于术后6个月复查CTA。结果 26例中成功开通目标动脉21例(技术成功率80.7%),造影证实血流通畅,残留狭窄小于30%,术后患肢缺血症状缓解。术后1周ABI高于术前(0.77±0.10 vs 0.43±0.15,t=7.948,P<0.05)。6个月一期通畅比例分别为裸支架组9/13,Silver-hawk斑块旋切组4/6,Viabahn覆膜支架2/2。结论腔内治疗TASC(Ⅱ)D型股动脉闭塞可提高近期通畅率,Viabahn覆膜支架是治疗的新手段。展开更多
Fuzzy logic controller adopting unevenly-distributed membership function was presented with the purpose of enhancing performance of the temperature control precision and robustness for the chamber cooling system.Histo...Fuzzy logic controller adopting unevenly-distributed membership function was presented with the purpose of enhancing performance of the temperature control precision and robustness for the chamber cooling system.Histogram equalization and noise detection were performed to modify the evenly-distributed membership functions of error and error change rate into unevenly-distributed membership functions.Then,the experimental results with evenly and unevenly distributed membership functions were compared under the same outside environment conditions.The experimental results show that the steady-state error is reduced around 40% and the noise disturbance is rejected successfully even though noise range is 60% of the control precision range.The control precision is improved by reducing the steady-state error and the robustness is enhanced by rejecting noise disturbance through the fuzzy logic controller with unevenly-distributed membership function.Moreover,the system energy efficiency and lifetime of electronic expansion valve(EEV) installed in chamber cooling system are improved by adopting the unevenly-distributed membership function.展开更多
文摘目的:探讨应用上腔静脉滤器对肿瘤合并上肢深静脉血栓形成患者预防肺栓塞发生的安全性和有效性。方法:回顾性分析20例上肢深静脉血栓形成患者资料。20例患者中肺癌6例,胃癌4例,乳腺癌2例,卵巢癌、胰腺癌、鼻咽癌、白血病、恶性淋巴瘤、食管癌、贲门癌、胸腺瘤术后左颈部转移各1例。其中9例患者行PICC(Peripheral inserted central catheter)置管化疗,2例行锁骨下静脉置管化疗。结果:全部患者均成功置入上腔静脉滤器,保留深静脉置管的患者术后成功拔除深静脉导管,无手术相关并发症发生,随访6~24个月,术后无症状性肺栓塞、上腔静脉穿孔、滤器移位及上腔静脉综合征发生。结论:恶性肿瘤及深静脉置管是上肢深静脉血栓形成最重要的原因,上腔静脉滤器置入是预防肿瘤合并上肢深静脉血栓形成患者发生肺栓塞的一种安全和有效的措施。
文摘目的探讨TASC(Ⅱ)D型股动脉闭塞的腔内治疗方法及效果。方法回顾性分析2012年1月—2013年5月采用腔内治疗TASC(Ⅱ)D型股浅动脉闭塞26例(26肢)患者的临床资料。其中采用球囊扩张内支架置入13例(裸支架组,共植入支架31枚)、Silverhawk斑块旋切6例(Silverhawk斑块旋切组)、Viabahn覆膜支架2例(Viabahn覆膜支架组)。腔内手术未成功通过病变者5例给予前列地尔等扩血管药物治疗。通过手术前后踝肱指数(ABI)、螺旋CT血管成像(CTA)、数字减影血管造影(DSA)及症状改善情况来评价疗效;并于术后6个月复查CTA。结果 26例中成功开通目标动脉21例(技术成功率80.7%),造影证实血流通畅,残留狭窄小于30%,术后患肢缺血症状缓解。术后1周ABI高于术前(0.77±0.10 vs 0.43±0.15,t=7.948,P<0.05)。6个月一期通畅比例分别为裸支架组9/13,Silver-hawk斑块旋切组4/6,Viabahn覆膜支架2/2。结论腔内治疗TASC(Ⅱ)D型股动脉闭塞可提高近期通畅率,Viabahn覆膜支架是治疗的新手段。
文摘Fuzzy logic controller adopting unevenly-distributed membership function was presented with the purpose of enhancing performance of the temperature control precision and robustness for the chamber cooling system.Histogram equalization and noise detection were performed to modify the evenly-distributed membership functions of error and error change rate into unevenly-distributed membership functions.Then,the experimental results with evenly and unevenly distributed membership functions were compared under the same outside environment conditions.The experimental results show that the steady-state error is reduced around 40% and the noise disturbance is rejected successfully even though noise range is 60% of the control precision range.The control precision is improved by reducing the steady-state error and the robustness is enhanced by rejecting noise disturbance through the fuzzy logic controller with unevenly-distributed membership function.Moreover,the system energy efficiency and lifetime of electronic expansion valve(EEV) installed in chamber cooling system are improved by adopting the unevenly-distributed membership function.