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BACKGROUND: Artificial femoral head replacement is an effective method for the treatment of elderly unstable intertrochanteric fractures. However, the effect of lesser trochanter reconstruction in femoral head replacement for Evans-III femoral intertrochanteric fractures has not been reported. OBJECTIVE: To analyze the effect of lesser trochanter reconstruction on the outcome of artificial femoral head replacement with long stem in elderly patients with Evans-III femoral intertrochanteric fracture. METHODS: A retrospective analysis was performed on medical records of 45 elderly patients who underwent bipolar long-stem artificial femoral head replacement due to Evans-III femoral intertrochanteric fractures in the Department of Bone and Joint Surgery, Second Affiliated Hospital of Xi’an Jiaotong University from June 2017 to May 2021. According to whether the small trochanter was reconstructed during surgery (reduction and fixation), they were divided into the reconstruction group (n=25) and the non-reconstruction group (n=20). The operation time, bleeding volume, time of getting out of bed, hospital stay time, Harris scores at 3 and 6 months postoperatively, and the incidence of complications during follow-up were compared between the two groups. RESULTS AND CONCLUSION: (1) The operation time of the reconstruction group was longer (99.72±13.41 minutes) than that of the non-reconstruction group (88.90±16.53 minutes) (t=2.369, P=0.023), and there were no significant differences in bleeding volume, time of getting out of bed or hospital stay time between the two groups (P > 0.05). (2) The Harris score of the reconstruction group (69.06±5.64 points) was higher than that of the non-reconstruction group (63.35±5.93 points) at 3 months postoperatively (t=2.982, P=0.005). At 6 months postoperatively, the Harris score of the reconstruction group (86.67±4.49 points) was higher than that of the non-reconstruction group (82.34±5.68 points) (t=2.782, P=0.009). (3) In addition, no significant difference existed in the incidence of complications between the reconstruction and non-reconstruction groups (χ²=0.008, P=0.927). (4) It is concluded that in elderly patients with Evans-III femoral intertrochanteric fractures, lesser trochanter reconstruction in the artificial femoral head replacement significantly improved postoperative hip function despite increased operative time, demonstrating the importance of the lesser trochanter reconstruction in the artificial femoral head replacement for Evans-III intertrochanteric fractures in the elderly people. [ABSTRACT FROM AUTHOR]

Objectives: The Ripley' s K-function has been widely applied to test for spatial point patterns in many fields such as economic geography, plant geography, and epidemiology. Because of the mathematical confusion of spatial point processes, there are many errors in measuring the distributions of spatial point objects in the corresponding published papers. Methods: This paper discusses Monte Carlo simulation method in the application of Ripley's K-function from perspectives of dynamics of random point patterns, suitability of parameter definition, and reliability of edge correction algorithms. First, we introduce the estimation methods of spatial point pattern analysis based on Ripley's K-function. Second, the formula of Ripley's Kfunction is corrected by various edge effect correction methods and compared in the applications. Finally, the modified algorithm is employed for spatial point pattern analysis of the nutrient concentrations of orange plants in Xinping County, Yunnan Province, China. Results: The preliminary results indicated that the number of Monte Carlo simulations has a great influence on the analysis of the observed spatial point patterns. The significance tests of the observed spatial point patterns change in the process of running ArcGIS Ripley's K-function software package, showing some degree of uncertainty of the observed results. The edge effect correction of Ripley's K-function based on GIS techniques is greatly recommended due to its extension to an arbitrary polygon from a common rectangular shape. Conclusions: Considering the popularity of Monte Carlo simulation in statistics and spatial data analysis, this paper provides important insights on edge correction and significance tests in other spatial clustering methods. [ABSTRACT FROM AUTHOR]

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Xinyang Normal University Natural Science Edition is the property of Journal of Xinyang Normal University Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Xinyang Normal University Natural Science Edition is the property of Journal of Xinyang Normal University Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

近年来,医学影像学发展迅速,在临床诊断中的地位日渐重要。医学影像学实习是将枯燥的理论知识加以灵活运用的重要培训阶段,为了提高实习的教学质量,需要建立一种与时俱进的新的教学模式。将以案例为基础的学习（CBL）与多媒体教学相结合运用于医学影像学实习教学中,可以将枯燥的教学变得直观生动,打破传统单一的教学模式,加强实习教学的效果。不但能促进学生对知识点的理解和掌握,还可以激发学生的学习兴趣,提高学生学习的主动性,锻炼学生的综合分析、归纳总结等多方面的能力,增强对所学知识的横向联系,对医学生进入未来的临床工作打下良好的基础。 [ABSTRACT FROM AUTHOR]