Upper eyelid blepharoplasty is one of the most frequently performed surgeries by plastic surgeons worldwide. A prospective observational study was conducted to describe the anthropometric measurements of the upper eye...Upper eyelid blepharoplasty is one of the most frequently performed surgeries by plastic surgeons worldwide. A prospective observational study was conducted to describe the anthropometric measurements of the upper eyelid and eyebrow in a Mexican population. The researcher measured the anthropometry of the eyelids and eyebrows to establish the diagnosis and surgical plan according to the checklist created and applied by the plastic and reconstructive surgery service. In anatomical position with a caliper instrument, the marginal reflex distance (MRD1), the tarsal thickness, the length of the vertical and horizontal slit, and finally the distance at which the external canthus is located with respect to the internal canthus were measured in millimeters. For the anthropometry of the eyebrows, the distance from the eyebrows to the hairline, the position in millimeters of the orbital rim with respect to the eyebrow, and the angle of its apex were measured. A sample of 210 patients was obtained, of which 65 were male and 145 females, divided by age groups. It was observed that in the three age groups, females presented a vertical palpebral fissure with a higher mean than males. Similar is the case of tarsal thickness, in which the difference was significantly greater in the female of the three age groups. On the other hand, it was observed that the horizontal slit in males was higher than that of females, while the MDR1 was similar in both sexes. Finally, it was identified that in the group of 41 to 50 years old significant decreases are observed both in the vertical cleft, tarsal thickness and the position of the external canthus compared to the group of 20 to 30 years old, this is due to the aging process. When evaluating the anthropometrics of the eyebrows, a greater distance from the trichion to the eyebrow was observed in males than in females, in contrast to the position of the eyebrow with respect to the supraorbital rim and its apex, in which it was shown that in females there is a greater distance. In the other groups, the trends were maintained;however, a decrease was observed in the angle of the apex of the eyebrow and the RSO-eyebrow distance in males and females with advancing age, being more important in the group of 41 to 50 years. Systematized palpebral and periorbital anthropometric analysis is fundamental in the evaluation consultation. It allows us to make a precise diagnosis of the functional and aesthetic alterations that must be corrected during a surgical procedure, according to the concept of beauty of each culture or ethnicity.展开更多
Background: The hand is an essential component for performing our daily tasks;as a result, injuries to the fingertip are frequently seen. Accurate evaluation and treatment of fingertip injuries are essential to avoidi...Background: The hand is an essential component for performing our daily tasks;as a result, injuries to the fingertip are frequently seen. Accurate evaluation and treatment of fingertip injuries are essential to avoiding long-term disability, job loss and psychological issues. No matter the injury classification system, maintaining finger length, regaining sensation, and improving appearance are the three main objectives of treatment. The objective of this research was to outline the epidemiology of fingertip injuries treated between 2021 and 2022 at a highly specialized referral hospital in Mexico City. Methodology: This investigation is cross-sectional, retrospective, and observational. From January 2021 to December 2022, 60 patients with a diagnosis of fingertip injury from the South Central Hospital “Pemex” were included. The descriptive statistical analysis was performed using SPSS29. Results: 60 patients were included, 27 (45%) were women and 33 (55%) were men. Allen’s classification was able to classify only 19 patients, of which 18 (94.7%) had a type 1 classification and one (5.26%) had a type 2 classification. 10% of patients experienced complications, which included 2 patients with surgical site infections (3.3%), 3 patients with persistent pain (5%), and 1 patient (1.6%) with graft rejection. Conclusions: There are currently insufficient epidemiological data on hand and wrist injuries and its effects on labor in Mexico. Fingertip injuries require particular care in order to prevent complications and long-term damage. The creation of national registries could help with the creation of reference manuals for the care of hand and wrist injuries in our nation.展开更多
Background: The trigger finger, also known as stenosing tenosynovitis of the flexor tendon, is a common cause of hand disability;This can result in significant limitations in certain daily living activities. It is pos...Background: The trigger finger, also known as stenosing tenosynovitis of the flexor tendon, is a common cause of hand disability;This can result in significant limitations in certain daily living activities. It is possible to treat this condition with conservative or surgical methods. Methods: This is a retrospective, observational, cross-sectional and descriptive study. The source population consisted of all patients with a diagnosis of trigger finger who had been treated in the department of plastic and reconstructive surgery of our institution between 2020 and 2023. The primary objective of this study is to determine the prevalence and characterize the clinical and surgical characteristics of the population affected by trigger finger in our hospital. Results: The total population was 237 patients, of which 165 were women (70%) and 72 men (30%). The most affected hand was the right hand, with a total of 158 patients (67%). In the right hand, the middle finger was the most affected (45%). Of the 237 patients, 80 of them had obesity (34%), 86 had type 2 diabetes mellitus (36%), 95 had systemic arterial hypertension (40%). Open technique was performed in 190 (80%) patients, while percutaneous technique was performed in 47 (20%) of them. Conclusion: The female sex was twice as frequent, and the middle finger and thumb were the most affected. Most of the patients received surgical treatment with open approach and percutaneous approach in 20% of them.展开更多
The Global Stratotype Section and Point(GSSP)for the Cretaceous/Paleogene(K/Pg)boundary was defined at the base of the boundary clay at a section near El Kef,Tunisia,but the outcrop became quite deteriorated.In order ...The Global Stratotype Section and Point(GSSP)for the Cretaceous/Paleogene(K/Pg)boundary was defined at the base of the boundary clay at a section near El Kef,Tunisia,but the outcrop became quite deteriorated.In order to better characterize the boundary and to solve problems of correlation,several auxiliary sections are designed and described in detail including:Aïn Settara and Ellès in Tunisia,Caravaca and Zumaya in Spain,Bidart in France and El Mulato and Bochil in Mexico.These sections are the most continuous,expanded and representative of marine sedimentation in areas proximal and distal to the Chicxulub meteorite impact site.展开更多
为了优选TiO_(2)电极最适宜尺寸,提高栽培基质pH值在线检测的综合性能,利用磁控溅射法将TiO_(2)薄膜沉积在氧化铟锡/玻璃(Indium Tin Oxide/Glass,ITO/Glass)基板上,制备不同膜厚和面积的pH敏感电极,搭配固态Ag/AgCl参比电极构建pH传感...为了优选TiO_(2)电极最适宜尺寸,提高栽培基质pH值在线检测的综合性能,利用磁控溅射法将TiO_(2)薄膜沉积在氧化铟锡/玻璃(Indium Tin Oxide/Glass,ITO/Glass)基板上,制备不同膜厚和面积的pH敏感电极,搭配固态Ag/AgCl参比电极构建pH传感器.利用扫描电子显微镜(SEM)观察电极薄膜表面形貌发展规律,分析响应特性;在标准pH缓冲溶液中测试传感器响应特性.结果表明:较厚的TiO_(2)敏感膜具有更好的疏松多孔结构,传感器响应稳定性优异,但是响应灵敏度差;综合优选膜厚度为200 nm、膜尺寸为15 mm×15 mm的TiO_(2)敏感电极,pH值响应综合性能接近玻璃电极传感器;利用优选传感器在栽培基质pH检测应用试验中,pH检测最大绝对误差为0.52单位;通过对误差规律的总结,构建质量含水率补偿模型;经过质量含水率补偿后,pH检测最大绝对误差降低到了0.12单位,相对误差在5%以下,满足栽培基质pH值在线检测性能要求.展开更多
针对复杂动态场景下毫米波雷达点云目标跟踪的数据关联难题,提出一种融合空间位置、动态速度及信噪比(SNR)的自适应关联算法。传统方法存在两大局限:最近邻(NN)算法在低信噪比(SNR<10 d B)和密集目标场景中误匹配率高;联合概率数据关...针对复杂动态场景下毫米波雷达点云目标跟踪的数据关联难题,提出一种融合空间位置、动态速度及信噪比(SNR)的自适应关联算法。传统方法存在两大局限:最近邻(NN)算法在低信噪比(SNR<10 d B)和密集目标场景中误匹配率高;联合概率数据关联(JPDA)算法虽提升精度,但计算复杂度达O(n^(3)),单帧耗时长,难以满足实时性需求。通过建立SNR-门限的负相关模型,动态调整空间与速度关联门限,设计Sigmoid权重分配器实现位置与速度特征的智能平衡。展开更多
文摘Upper eyelid blepharoplasty is one of the most frequently performed surgeries by plastic surgeons worldwide. A prospective observational study was conducted to describe the anthropometric measurements of the upper eyelid and eyebrow in a Mexican population. The researcher measured the anthropometry of the eyelids and eyebrows to establish the diagnosis and surgical plan according to the checklist created and applied by the plastic and reconstructive surgery service. In anatomical position with a caliper instrument, the marginal reflex distance (MRD1), the tarsal thickness, the length of the vertical and horizontal slit, and finally the distance at which the external canthus is located with respect to the internal canthus were measured in millimeters. For the anthropometry of the eyebrows, the distance from the eyebrows to the hairline, the position in millimeters of the orbital rim with respect to the eyebrow, and the angle of its apex were measured. A sample of 210 patients was obtained, of which 65 were male and 145 females, divided by age groups. It was observed that in the three age groups, females presented a vertical palpebral fissure with a higher mean than males. Similar is the case of tarsal thickness, in which the difference was significantly greater in the female of the three age groups. On the other hand, it was observed that the horizontal slit in males was higher than that of females, while the MDR1 was similar in both sexes. Finally, it was identified that in the group of 41 to 50 years old significant decreases are observed both in the vertical cleft, tarsal thickness and the position of the external canthus compared to the group of 20 to 30 years old, this is due to the aging process. When evaluating the anthropometrics of the eyebrows, a greater distance from the trichion to the eyebrow was observed in males than in females, in contrast to the position of the eyebrow with respect to the supraorbital rim and its apex, in which it was shown that in females there is a greater distance. In the other groups, the trends were maintained;however, a decrease was observed in the angle of the apex of the eyebrow and the RSO-eyebrow distance in males and females with advancing age, being more important in the group of 41 to 50 years. Systematized palpebral and periorbital anthropometric analysis is fundamental in the evaluation consultation. It allows us to make a precise diagnosis of the functional and aesthetic alterations that must be corrected during a surgical procedure, according to the concept of beauty of each culture or ethnicity.
文摘Background: The hand is an essential component for performing our daily tasks;as a result, injuries to the fingertip are frequently seen. Accurate evaluation and treatment of fingertip injuries are essential to avoiding long-term disability, job loss and psychological issues. No matter the injury classification system, maintaining finger length, regaining sensation, and improving appearance are the three main objectives of treatment. The objective of this research was to outline the epidemiology of fingertip injuries treated between 2021 and 2022 at a highly specialized referral hospital in Mexico City. Methodology: This investigation is cross-sectional, retrospective, and observational. From January 2021 to December 2022, 60 patients with a diagnosis of fingertip injury from the South Central Hospital “Pemex” were included. The descriptive statistical analysis was performed using SPSS29. Results: 60 patients were included, 27 (45%) were women and 33 (55%) were men. Allen’s classification was able to classify only 19 patients, of which 18 (94.7%) had a type 1 classification and one (5.26%) had a type 2 classification. 10% of patients experienced complications, which included 2 patients with surgical site infections (3.3%), 3 patients with persistent pain (5%), and 1 patient (1.6%) with graft rejection. Conclusions: There are currently insufficient epidemiological data on hand and wrist injuries and its effects on labor in Mexico. Fingertip injuries require particular care in order to prevent complications and long-term damage. The creation of national registries could help with the creation of reference manuals for the care of hand and wrist injuries in our nation.
文摘Background: The trigger finger, also known as stenosing tenosynovitis of the flexor tendon, is a common cause of hand disability;This can result in significant limitations in certain daily living activities. It is possible to treat this condition with conservative or surgical methods. Methods: This is a retrospective, observational, cross-sectional and descriptive study. The source population consisted of all patients with a diagnosis of trigger finger who had been treated in the department of plastic and reconstructive surgery of our institution between 2020 and 2023. The primary objective of this study is to determine the prevalence and characterize the clinical and surgical characteristics of the population affected by trigger finger in our hospital. Results: The total population was 237 patients, of which 165 were women (70%) and 72 men (30%). The most affected hand was the right hand, with a total of 158 patients (67%). In the right hand, the middle finger was the most affected (45%). Of the 237 patients, 80 of them had obesity (34%), 86 had type 2 diabetes mellitus (36%), 95 had systemic arterial hypertension (40%). Open technique was performed in 190 (80%) patients, while percutaneous technique was performed in 47 (20%) of them. Conclusion: The female sex was twice as frequent, and the middle finger and thumb were the most affected. Most of the patients received surgical treatment with open approach and percutaneous approach in 20% of them.
基金funded by the IUGS,the Spanish Ministerio de Educación y Ciencia(Consolider project CGL2007-63724 and AECI project A/4845/06)the Aragonian Departamento de Educación y Ciencia(DGA group E05)L.Alegret acknowledges support from a Ramon y Cajal research contract from the Spanish Ministry of Science and Technology.
文摘The Global Stratotype Section and Point(GSSP)for the Cretaceous/Paleogene(K/Pg)boundary was defined at the base of the boundary clay at a section near El Kef,Tunisia,but the outcrop became quite deteriorated.In order to better characterize the boundary and to solve problems of correlation,several auxiliary sections are designed and described in detail including:Aïn Settara and Ellès in Tunisia,Caravaca and Zumaya in Spain,Bidart in France and El Mulato and Bochil in Mexico.These sections are the most continuous,expanded and representative of marine sedimentation in areas proximal and distal to the Chicxulub meteorite impact site.
文摘针对复杂动态场景下毫米波雷达点云目标跟踪的数据关联难题,提出一种融合空间位置、动态速度及信噪比(SNR)的自适应关联算法。传统方法存在两大局限:最近邻(NN)算法在低信噪比(SNR<10 d B)和密集目标场景中误匹配率高;联合概率数据关联(JPDA)算法虽提升精度,但计算复杂度达O(n^(3)),单帧耗时长,难以满足实时性需求。通过建立SNR-门限的负相关模型,动态调整空间与速度关联门限,设计Sigmoid权重分配器实现位置与速度特征的智能平衡。
