目的探讨大脑中央核心区(cerebral central core,CCC)高血压性脑出血的分型方法及其对选择手术入路的指导意义,并分析内镜手术疗效。方法回顾性分析54例CCC高血压性脑出血病人的临床资料,分为外侧型(n=32)、内侧型(n=18)和混合型(n=4)...目的探讨大脑中央核心区(cerebral central core,CCC)高血压性脑出血的分型方法及其对选择手术入路的指导意义,并分析内镜手术疗效。方法回顾性分析54例CCC高血压性脑出血病人的临床资料,分为外侧型(n=32)、内侧型(n=18)和混合型(n=4)。外侧型病人采用经外侧裂-岛叶入路内镜手术,内侧型病人采用经Kocher点-侧脑室额角入路内镜手术,混合型病人采用经Kocher点外侧额中回皮质造瘘入路。结果术后24 h复查头部CT显示脑实质血肿完全和近全清除52例(96.3%),大部分清除2例(3.7%);脑脊液循环通路恢复率94.4%。术后2周GCS评分较术前明显提高(P <0.05)。随访12~60个月,无死亡病例,无新发脑积水病人。结论对CCC高血压性脑出血,神经内镜手术是一种微侵袭而有效的方法,术前根据血肿影像学特点进行分型有利于选择合适的手术入路。展开更多
This paper proposes a Mach Zehnder/Fabry Perot Interferometer(MZI/FPI)fiber sensor based on Single-mode Fiber(SMF)and Hollow-core Fiber(HCF),which has high sensitivity to temperature and lateral loads.The proposed dev...This paper proposes a Mach Zehnder/Fabry Perot Interferometer(MZI/FPI)fiber sensor based on Single-mode Fiber(SMF)and Hollow-core Fiber(HCF),which has high sensitivity to temperature and lateral loads.The proposed device consists of two single-mode fiber cones formed by manually controlling the fusion splicer and an air cavity formed by fusing a section of hollow-core fiber.The structure of the sensor is a double cone cascaded air cavity.At the beginning of the design,we compared the basic transmission spectra of single cone structure and double cone structure experimentally,and therefore chose to use double cone structure and air cavity cascade.Light undergoes its first reflection at the first interface between the single-mode fiber and the air cavity structure,and its second reflection at the second interface between the air cavity structure and the single-mode fiber.The two reflected light waves produced by the two reflections form FP interference,which can be used to measure lateral loads.The transmitted light is excited through the first cone,and a portion of the core mode light is excited to the cladding,while another portion of the core mode light continues to propagate in the core.The light couples at the second cone,and the cladding mode light couples back into the core,forming MZ interference with the core mode light,which can be used to measure temperature.The use of hollow-core fiber to form an air cavity has little effect on transmitted light,while avoiding the problem of crosstalk in dual parameter measurements.By designing temperature and lateral load experiments,this article verifies the sensitivity characteristics of this sensor to temperature and lateral loads.A significant redshift phenomenon was observed in the temperature experiment.A significant redshift phenomenon also occurred in the lateral load experiment.Through wavelength demodulation,the experimental results show that the wavelength sensitivity of the sensor to temperature is 56.29 pm/℃in the range of 30℃to 80℃.The wavelength sensitivity of the sensor to lateral loads is 1.123 nm/N in the range of 0~5 N.In addition,we have prepared multiple sets of fiber optic sensors with this structure and conducted repeated experiments to verify that the sensing performance of this structure of fiber optic sensors for temperature and lateral load is relatively stable.Also,the different waist diameters of cones will have a certain impact on the transmission spectrum of MZ,while the length of the air cavity will also have a certain impact on the reflection spectrum of FP.This article lists some fiber optic sensors for dual parameter measurement of temperature and lateral load.Compared with the listed sensors,the fiber optic sensor proposed in this article has better sensitivity to temperature and lateral load.And the fiber optic sensor proposed in this article has a simple manufacturing process,low production cost,and good performance,which has certain prospects in scientific research and industrial production.展开更多
文摘目的探讨大脑中央核心区(cerebral central core,CCC)高血压性脑出血的分型方法及其对选择手术入路的指导意义,并分析内镜手术疗效。方法回顾性分析54例CCC高血压性脑出血病人的临床资料,分为外侧型(n=32)、内侧型(n=18)和混合型(n=4)。外侧型病人采用经外侧裂-岛叶入路内镜手术,内侧型病人采用经Kocher点-侧脑室额角入路内镜手术,混合型病人采用经Kocher点外侧额中回皮质造瘘入路。结果术后24 h复查头部CT显示脑实质血肿完全和近全清除52例(96.3%),大部分清除2例(3.7%);脑脊液循环通路恢复率94.4%。术后2周GCS评分较术前明显提高(P <0.05)。随访12~60个月,无死亡病例,无新发脑积水病人。结论对CCC高血压性脑出血,神经内镜手术是一种微侵袭而有效的方法,术前根据血肿影像学特点进行分型有利于选择合适的手术入路。
基金National Natural Science Foundation of China(Nos.6207509,U2001601,61975084)the Jiangsu Provincial Key Research and Development Program(Nos.BE2022079,BE2022055-2)。
文摘This paper proposes a Mach Zehnder/Fabry Perot Interferometer(MZI/FPI)fiber sensor based on Single-mode Fiber(SMF)and Hollow-core Fiber(HCF),which has high sensitivity to temperature and lateral loads.The proposed device consists of two single-mode fiber cones formed by manually controlling the fusion splicer and an air cavity formed by fusing a section of hollow-core fiber.The structure of the sensor is a double cone cascaded air cavity.At the beginning of the design,we compared the basic transmission spectra of single cone structure and double cone structure experimentally,and therefore chose to use double cone structure and air cavity cascade.Light undergoes its first reflection at the first interface between the single-mode fiber and the air cavity structure,and its second reflection at the second interface between the air cavity structure and the single-mode fiber.The two reflected light waves produced by the two reflections form FP interference,which can be used to measure lateral loads.The transmitted light is excited through the first cone,and a portion of the core mode light is excited to the cladding,while another portion of the core mode light continues to propagate in the core.The light couples at the second cone,and the cladding mode light couples back into the core,forming MZ interference with the core mode light,which can be used to measure temperature.The use of hollow-core fiber to form an air cavity has little effect on transmitted light,while avoiding the problem of crosstalk in dual parameter measurements.By designing temperature and lateral load experiments,this article verifies the sensitivity characteristics of this sensor to temperature and lateral loads.A significant redshift phenomenon was observed in the temperature experiment.A significant redshift phenomenon also occurred in the lateral load experiment.Through wavelength demodulation,the experimental results show that the wavelength sensitivity of the sensor to temperature is 56.29 pm/℃in the range of 30℃to 80℃.The wavelength sensitivity of the sensor to lateral loads is 1.123 nm/N in the range of 0~5 N.In addition,we have prepared multiple sets of fiber optic sensors with this structure and conducted repeated experiments to verify that the sensing performance of this structure of fiber optic sensors for temperature and lateral load is relatively stable.Also,the different waist diameters of cones will have a certain impact on the transmission spectrum of MZ,while the length of the air cavity will also have a certain impact on the reflection spectrum of FP.This article lists some fiber optic sensors for dual parameter measurement of temperature and lateral load.Compared with the listed sensors,the fiber optic sensor proposed in this article has better sensitivity to temperature and lateral load.And the fiber optic sensor proposed in this article has a simple manufacturing process,low production cost,and good performance,which has certain prospects in scientific research and industrial production.
