AIM:To describe a novel technique of creating a landing strip within the trabecular meshwork to guide trabecular micro-bypass stent(iStent) implantation in patients who underwent phacoemulsification.METHODS:Thirty...AIM:To describe a novel technique of creating a landing strip within the trabecular meshwork to guide trabecular micro-bypass stent(iStent) implantation in patients who underwent phacoemulsification.METHODS:Thirty-four eyes from 30 patients who underwent i Stent implantation after phacoemulsification from May 2014 to February 2015 were included in our retrospective study. All iStents were implanted via the "landing strip" technique. A 25-gauge microvitreoretinal blade was used to bisect the trabecular meshwork to less than 1 clock-hour, effectively creating a landing strip. The iStent applicator was pressed along the landing strip and then the stent was released into the trabecular meshwork. RESULTS:Of the 34 eyes with iStent implantation, 27(79.4%) eyes had primary open-angle glaucoma, 6(17.6%) eyes had pseudoexfoliation glaucoma, and 1(2.9%) eye had ocular hypertension. At 6-month follow-up(n=17), the mean number of hypotensive medications decreased from 2.2±1.2 at baseline to 0.8±1.3(P=0.05) and mean intraocular pressure decreased from 19.7±4.1 mm Hg at baseline to 16.7±2.1 mm Hg(P=0.58). Two eyes(5.9%) required subsequent trabeculectomy. CONCLUSION:The "landing strip" technique appears to be an effective way to assist with iS tent implantation.展开更多
Modeling of the roughness in micro-nano scale and its influence have not been fully investigated, however the roughness will cause amplitude and phase errors of the radiating slot, and decrease the precision and effic...Modeling of the roughness in micro-nano scale and its influence have not been fully investigated, however the roughness will cause amplitude and phase errors of the radiating slot, and decrease the precision and efficiency of the SWA in Ku-band. Firstly, the roughness is simulated using the electromechanical coupled(EC) model. The relationship between roughness and the antenna's radiation properties is obtained. For verification, an antenna proto- type is manufactured and tested, and the simulation method is introduced. According to the prototype, a contrasting experiment dealing with the flatness of the radiating plane is conducted to test the simulation method. The advantage of the EC model is validated by comparisons of the EC model and two classical roughness models (sine wave and fractal function), which shows that the EC model gives a more accurate description model for roughness, the maxi- mum error is 13%. The existence of roughness strongly broadens the beamwidth and raises the side-lobe level of SWA, which is 1.2 times greater than the ideal antenna. In addition, effect of the EC model's evaluation indices is investigated, the most affected scale of the roughness is found, which is 1/10 of the working wavelength. The proposed research provides the instruction for antenna designing and manufacturing.展开更多
Object: To evaluate the use of neuronavigation with vascular micro-doppler in transsphenoidal pituitary surgery. Methods: 141 cases having done transsphenoidal pituitary surgery are evaluated from 2005 to 2014. Fluoro...Object: To evaluate the use of neuronavigation with vascular micro-doppler in transsphenoidal pituitary surgery. Methods: 141 cases having done transsphenoidal pituitary surgery are evaluated from 2005 to 2014. Fluoroscopy was used in 69 cases and vascular micro-doppler with neuronavigation were used in 72 cases. Results: Transsphenoidal surgery has a lot of risks due to sella’s deep location, and position of the carotid artery and the optic nerve. Clasically the fluoroscopy and microscopic anatomical markers were used in order to minimize the risk of carotid artery and optic nerve damage. Additional devices such as neuronavigation and vascular micro-doppler are needed to decrease the morbidity and mortality arising from these injuries. Conclusion: Neurovascular complications such as carotid artery and optic nerve injuries owing to disorientation in transsphenoidal surgery will reduce the use of neuronavigation with vascular micro-doppler.展开更多
目的观察显微根尖手术对根尖周炎的治疗效果。方法回顾性选取2019年1月至2023年1月在绍兴市口腔医院诊治的根尖周炎患者75例。其中38例患者行显微根尖手术治疗,为观察组;另37例患者行传统根尖手术治疗,为对照组。比较两组患者术后7 d疼...目的观察显微根尖手术对根尖周炎的治疗效果。方法回顾性选取2019年1月至2023年1月在绍兴市口腔医院诊治的根尖周炎患者75例。其中38例患者行显微根尖手术治疗,为观察组;另37例患者行传统根尖手术治疗,为对照组。比较两组患者术后7 d疼痛发生情况、术后并发症发生情况、术前和术后7 d牙周指标,包括菌斑指数(PLI)、牙龈出血指数(GBI)和牙周袋探诊深度(PD);比较两组患者术后12个月疗效。结果观察组患者术后7 d疼痛发生率低于对照组(7.89%比27.03%,P<0.05),术后并发症发生率小于对照组(7.89%比37.84%,P<0.05)。两组患者术后7 d PLI、GBI和PD均低于术前(均P<0.05),且观察组患者术后7 d PLI、GBI和PD均低于对照组(均P<0.05)。观察组患者术后12个月治疗总有效率高于对照组(97.37%比78.38%,P<0.05)。结论显微根尖手术治疗根尖周炎效果显著,且可显著改善牙周指标,降低术后疼痛和并发症发生风险,值得临床推广应用。展开更多
文摘AIM:To describe a novel technique of creating a landing strip within the trabecular meshwork to guide trabecular micro-bypass stent(iStent) implantation in patients who underwent phacoemulsification.METHODS:Thirty-four eyes from 30 patients who underwent i Stent implantation after phacoemulsification from May 2014 to February 2015 were included in our retrospective study. All iStents were implanted via the "landing strip" technique. A 25-gauge microvitreoretinal blade was used to bisect the trabecular meshwork to less than 1 clock-hour, effectively creating a landing strip. The iStent applicator was pressed along the landing strip and then the stent was released into the trabecular meshwork. RESULTS:Of the 34 eyes with iStent implantation, 27(79.4%) eyes had primary open-angle glaucoma, 6(17.6%) eyes had pseudoexfoliation glaucoma, and 1(2.9%) eye had ocular hypertension. At 6-month follow-up(n=17), the mean number of hypotensive medications decreased from 2.2±1.2 at baseline to 0.8±1.3(P=0.05) and mean intraocular pressure decreased from 19.7±4.1 mm Hg at baseline to 16.7±2.1 mm Hg(P=0.58). Two eyes(5.9%) required subsequent trabeculectomy. CONCLUSION:The "landing strip" technique appears to be an effective way to assist with iS tent implantation.
基金Supported by National Natural Science Foundation of China(Grant Nos.51305322,51405364,51475348)
文摘Modeling of the roughness in micro-nano scale and its influence have not been fully investigated, however the roughness will cause amplitude and phase errors of the radiating slot, and decrease the precision and efficiency of the SWA in Ku-band. Firstly, the roughness is simulated using the electromechanical coupled(EC) model. The relationship between roughness and the antenna's radiation properties is obtained. For verification, an antenna proto- type is manufactured and tested, and the simulation method is introduced. According to the prototype, a contrasting experiment dealing with the flatness of the radiating plane is conducted to test the simulation method. The advantage of the EC model is validated by comparisons of the EC model and two classical roughness models (sine wave and fractal function), which shows that the EC model gives a more accurate description model for roughness, the maxi- mum error is 13%. The existence of roughness strongly broadens the beamwidth and raises the side-lobe level of SWA, which is 1.2 times greater than the ideal antenna. In addition, effect of the EC model's evaluation indices is investigated, the most affected scale of the roughness is found, which is 1/10 of the working wavelength. The proposed research provides the instruction for antenna designing and manufacturing.
文摘Object: To evaluate the use of neuronavigation with vascular micro-doppler in transsphenoidal pituitary surgery. Methods: 141 cases having done transsphenoidal pituitary surgery are evaluated from 2005 to 2014. Fluoroscopy was used in 69 cases and vascular micro-doppler with neuronavigation were used in 72 cases. Results: Transsphenoidal surgery has a lot of risks due to sella’s deep location, and position of the carotid artery and the optic nerve. Clasically the fluoroscopy and microscopic anatomical markers were used in order to minimize the risk of carotid artery and optic nerve damage. Additional devices such as neuronavigation and vascular micro-doppler are needed to decrease the morbidity and mortality arising from these injuries. Conclusion: Neurovascular complications such as carotid artery and optic nerve injuries owing to disorientation in transsphenoidal surgery will reduce the use of neuronavigation with vascular micro-doppler.
文摘目的观察显微根尖手术对根尖周炎的治疗效果。方法回顾性选取2019年1月至2023年1月在绍兴市口腔医院诊治的根尖周炎患者75例。其中38例患者行显微根尖手术治疗,为观察组;另37例患者行传统根尖手术治疗,为对照组。比较两组患者术后7 d疼痛发生情况、术后并发症发生情况、术前和术后7 d牙周指标,包括菌斑指数(PLI)、牙龈出血指数(GBI)和牙周袋探诊深度(PD);比较两组患者术后12个月疗效。结果观察组患者术后7 d疼痛发生率低于对照组(7.89%比27.03%,P<0.05),术后并发症发生率小于对照组(7.89%比37.84%,P<0.05)。两组患者术后7 d PLI、GBI和PD均低于术前(均P<0.05),且观察组患者术后7 d PLI、GBI和PD均低于对照组(均P<0.05)。观察组患者术后12个月治疗总有效率高于对照组(97.37%比78.38%,P<0.05)。结论显微根尖手术治疗根尖周炎效果显著,且可显著改善牙周指标,降低术后疼痛和并发症发生风险,值得临床推广应用。