Button cell ingestion is a common household accident among infants, often leading to serious complications that require immediate diagnosis and urgent removal. We report five cases of button cell ingestion involving i...Button cell ingestion is a common household accident among infants, often leading to serious complications that require immediate diagnosis and urgent removal. We report five cases of button cell ingestion involving infants aged between 9 and 32 months, including four boys and one girl. The ingestion was accidentally discovered in two infants, while in the other three, it was suspected during play. In three cases, mothers attempted to induce vomiting by giving fluids, but the batteries remained in the digestive tract for 38 hours to 5 days. After confirming the diagnosis, the batteries were removed within 4 to 36 hours. The locations of the cells were the esophagus in two cases, the cardia in one, the stomach in one, and the bowel in one. One case involved a large cell in the esophagus, while the others involved smaller cells. Complications occurred in four cases, including esotracheal fistula, esophageal ulceration, and perforation of the jejunum and caecum. In one case, the digestive mucosa appeared normal upon endoscopy. One patient died.展开更多
Fast recognition of elevator buttons is a key step for service robots toride elevators automatically. Although there are some studies in this field, noneof them can achieve real-time application due to problems such a...Fast recognition of elevator buttons is a key step for service robots toride elevators automatically. Although there are some studies in this field, noneof them can achieve real-time application due to problems such as recognitionspeed and algorithm complexity. Elevator button recognition is a comprehensiveproblem. Not only does it need to detect the position of multiple buttonsat the same time, but also needs to accurately identify the characters on eachbutton. The latest version 5 of you only look once algorithm (YOLOv5) hasthe fastest reasoning speed and can be used for detecting multiple objects inreal-time. The advantages ofYOLOv5 make it an ideal choice for detecting theposition of multiple buttons in an elevator, but it’s not good at specific wordrecognition. Optical character recognition (OCR) is a well-known techniquefor character recognition. This paper innovatively improved the YOLOv5network, integrated OCR technology, and applied them to the elevator buttonrecognition process. First, we changed the detection scale in the YOLOv5network and only maintained the detection scales of 40 ∗ 40 and 80 ∗ 80, thusimproving the overall object detection speed. Then, we put a modified OCRbranch after the YOLOv5 network to identify the numbers on the buttons.Finally, we verified this method on different datasets and compared it withother typical methods. The results show that the average recall and precisionof this method are 81.2% and 92.4%. Compared with others, the accuracyof this method has reached a very high level, but the recognition speed hasreached 0.056 s, which is far higher than other methods.展开更多
Anterior cruciate ligament(ACL)injuries of the knee are one of the most common and serious athletic injuries.The widely used cortical suspension fixation buttons for ligament reconstruction are permanent implants,part...Anterior cruciate ligament(ACL)injuries of the knee are one of the most common and serious athletic injuries.The widely used cortical suspension fixation buttons for ligament reconstruction are permanent implants,particularly those made from conventional steel or titanium alloys.In this study,a biodegradable Zn-0.45Mn-0.2Mg(ZMM42)alloy with the yield strength of 300.4 MPa and tensile strength of 329.8 MPa was prepared through hot extrusion.The use of zinc alloys in the preparation of cortical suspension fixation buttons was proposed for the first time.After 35 d of immersion in simulated body fluids,the ZMM42 alloy fixation buttons were degraded at a rate of 44μm/a,and the fixation strength was retained(379.55 N)in the traction loops.Simultaneously,the ZMM42 alloy fixation buttons exhibited an increase in MC3T3-E1 cell viability and high antibacterial activity against Escherichia coli and Staphylococcus aureus.These results reveal the potential of biodegradable zinc alloys for use as ligament reconstruction materials and for developing diverse zinc alloy cortical suspension fixation devices.展开更多
目的:比较双袢与“Y”形三袢TightRope纽扣钢板内固定治疗新鲜RockwoodⅢ~Ⅴ型肩锁关节脱位的临床疗效及安全性。方法:回顾性分析2016年1月至2019年5月收治的74例肩锁关节脱位患者的病例资料,其中采用双袢TightRope纽扣钢板内固定治疗...目的:比较双袢与“Y”形三袢TightRope纽扣钢板内固定治疗新鲜RockwoodⅢ~Ⅴ型肩锁关节脱位的临床疗效及安全性。方法:回顾性分析2016年1月至2019年5月收治的74例肩锁关节脱位患者的病例资料,其中采用双袢TightRope纽扣钢板内固定治疗者43例(双袢组),采用“Y”形三袢TightRope纽扣钢板内固定治疗者31例(三袢组)。比较2组患者的手术时间、喙锁间距差值、肩部疼痛视觉模拟量表(visual analogue scale,VAS)评分、加州大学洛杉矶分校(University of California Los Angeles,UCLA)肩关节量表评分、Constant-Murley肩关节评分及并发症发生率。结果:双袢组的手术时间短于三袢组[(31.37±4.03)min,(50.94±5.66)min,t=17.387,P=0.000)]。术后6周、24周、1年以及末次随访时,双袢组的喙锁间距差值均高于三袢组[(1.60±1.76)mm,(0.26±0.23)mm,t=4.220,P=0.000;(2.11±2.11)mm,(0.31±0.31)mm,t=4.695,P=0.000;(2.19±2.19)mm,(0.38±0.37)mm,t=4.536,P=0.000;(2.21±2.21)mm,(0.40±0.39)mm,t=4.499,P=0.000]。末次随访时,2组患者的肩部疼痛VAS评分均较术前降低(t=32.538,P=0.000;t=24.849,P=0.000),2组患者的肩部疼痛VAS评分比较,差异无统计学意义[(0.56±0.70)分,(0.55±0.72)分,t=0.058,P=0.954]。末次随访时,2组患者的UCLA肩关节量表评分均较术前增高(t=-108.72,P=0.000;t=-52.267,P=0.000),双袢组的UCLA肩关节量表评分低于三袢组[(47.02±1.71)分,(49.32±2.77)分,t=-2.490,P=0.015]。末次随访时,2组患者的Constant-Murley肩关节评分均较术前增高(t=-63.617,P=0.000;t=-67.607,P=0.000),双袢组的Constant-Murley肩关节评分低于三袢组[(94.58±2.70)分,(94.61±3.12)分,t=-2.135,P=0.036]。双袢组2例发生锁骨骨溶解,三袢组1例发生切口感染。2组患者并发症发生率比较,差异无统计学意义(P=1.000)。结论:双袢与“Y”形三袢TightRope纽扣钢板内固定治疗新鲜RockwoodⅢ~Ⅴ型肩锁关节脱位,均能减轻肩关节疼痛,但双袢固定的手术时间更短、“Y”形三袢固定的肩关节功能恢复得更好。展开更多
文摘Button cell ingestion is a common household accident among infants, often leading to serious complications that require immediate diagnosis and urgent removal. We report five cases of button cell ingestion involving infants aged between 9 and 32 months, including four boys and one girl. The ingestion was accidentally discovered in two infants, while in the other three, it was suspected during play. In three cases, mothers attempted to induce vomiting by giving fluids, but the batteries remained in the digestive tract for 38 hours to 5 days. After confirming the diagnosis, the batteries were removed within 4 to 36 hours. The locations of the cells were the esophagus in two cases, the cardia in one, the stomach in one, and the bowel in one. One case involved a large cell in the esophagus, while the others involved smaller cells. Complications occurred in four cases, including esotracheal fistula, esophageal ulceration, and perforation of the jejunum and caecum. In one case, the digestive mucosa appeared normal upon endoscopy. One patient died.
基金the Research and Implementation of An Intelligent Driving Assistance System Based on Augmented Reality in Hebei Science and Technology Support Plan (Grant Number 17210803D)Science and Technology Research Project of Higher Education in Hebei Province (Grant Number ZD2020318)Middle School Students Science and Technology Innovation Ability Cultivation Special Project (Grant No.22E50075D)and project (Grant No.1181480).
文摘Fast recognition of elevator buttons is a key step for service robots toride elevators automatically. Although there are some studies in this field, noneof them can achieve real-time application due to problems such as recognitionspeed and algorithm complexity. Elevator button recognition is a comprehensiveproblem. Not only does it need to detect the position of multiple buttonsat the same time, but also needs to accurately identify the characters on eachbutton. The latest version 5 of you only look once algorithm (YOLOv5) hasthe fastest reasoning speed and can be used for detecting multiple objects inreal-time. The advantages ofYOLOv5 make it an ideal choice for detecting theposition of multiple buttons in an elevator, but it’s not good at specific wordrecognition. Optical character recognition (OCR) is a well-known techniquefor character recognition. This paper innovatively improved the YOLOv5network, integrated OCR technology, and applied them to the elevator buttonrecognition process. First, we changed the detection scale in the YOLOv5network and only maintained the detection scales of 40 ∗ 40 and 80 ∗ 80, thusimproving the overall object detection speed. Then, we put a modified OCRbranch after the YOLOv5 network to identify the numbers on the buttons.Finally, we verified this method on different datasets and compared it withother typical methods. The results show that the average recall and precisionof this method are 81.2% and 92.4%. Compared with others, the accuracyof this method has reached a very high level, but the recognition speed hasreached 0.056 s, which is far higher than other methods.
基金financially supported by the Xiongan New Area Science and Technology Innovation Project,China(No.2022XACX0600)the Beijing Nova Program Cross Cooperation Program,China(No.20220484178)。
文摘Anterior cruciate ligament(ACL)injuries of the knee are one of the most common and serious athletic injuries.The widely used cortical suspension fixation buttons for ligament reconstruction are permanent implants,particularly those made from conventional steel or titanium alloys.In this study,a biodegradable Zn-0.45Mn-0.2Mg(ZMM42)alloy with the yield strength of 300.4 MPa and tensile strength of 329.8 MPa was prepared through hot extrusion.The use of zinc alloys in the preparation of cortical suspension fixation buttons was proposed for the first time.After 35 d of immersion in simulated body fluids,the ZMM42 alloy fixation buttons were degraded at a rate of 44μm/a,and the fixation strength was retained(379.55 N)in the traction loops.Simultaneously,the ZMM42 alloy fixation buttons exhibited an increase in MC3T3-E1 cell viability and high antibacterial activity against Escherichia coli and Staphylococcus aureus.These results reveal the potential of biodegradable zinc alloys for use as ligament reconstruction materials and for developing diverse zinc alloy cortical suspension fixation devices.
文摘目的:比较双袢与“Y”形三袢TightRope纽扣钢板内固定治疗新鲜RockwoodⅢ~Ⅴ型肩锁关节脱位的临床疗效及安全性。方法:回顾性分析2016年1月至2019年5月收治的74例肩锁关节脱位患者的病例资料,其中采用双袢TightRope纽扣钢板内固定治疗者43例(双袢组),采用“Y”形三袢TightRope纽扣钢板内固定治疗者31例(三袢组)。比较2组患者的手术时间、喙锁间距差值、肩部疼痛视觉模拟量表(visual analogue scale,VAS)评分、加州大学洛杉矶分校(University of California Los Angeles,UCLA)肩关节量表评分、Constant-Murley肩关节评分及并发症发生率。结果:双袢组的手术时间短于三袢组[(31.37±4.03)min,(50.94±5.66)min,t=17.387,P=0.000)]。术后6周、24周、1年以及末次随访时,双袢组的喙锁间距差值均高于三袢组[(1.60±1.76)mm,(0.26±0.23)mm,t=4.220,P=0.000;(2.11±2.11)mm,(0.31±0.31)mm,t=4.695,P=0.000;(2.19±2.19)mm,(0.38±0.37)mm,t=4.536,P=0.000;(2.21±2.21)mm,(0.40±0.39)mm,t=4.499,P=0.000]。末次随访时,2组患者的肩部疼痛VAS评分均较术前降低(t=32.538,P=0.000;t=24.849,P=0.000),2组患者的肩部疼痛VAS评分比较,差异无统计学意义[(0.56±0.70)分,(0.55±0.72)分,t=0.058,P=0.954]。末次随访时,2组患者的UCLA肩关节量表评分均较术前增高(t=-108.72,P=0.000;t=-52.267,P=0.000),双袢组的UCLA肩关节量表评分低于三袢组[(47.02±1.71)分,(49.32±2.77)分,t=-2.490,P=0.015]。末次随访时,2组患者的Constant-Murley肩关节评分均较术前增高(t=-63.617,P=0.000;t=-67.607,P=0.000),双袢组的Constant-Murley肩关节评分低于三袢组[(94.58±2.70)分,(94.61±3.12)分,t=-2.135,P=0.036]。双袢组2例发生锁骨骨溶解,三袢组1例发生切口感染。2组患者并发症发生率比较,差异无统计学意义(P=1.000)。结论:双袢与“Y”形三袢TightRope纽扣钢板内固定治疗新鲜RockwoodⅢ~Ⅴ型肩锁关节脱位,均能减轻肩关节疼痛,但双袢固定的手术时间更短、“Y”形三袢固定的肩关节功能恢复得更好。
