目的:探讨AI-HIP辅助手术规划系统在初次单侧全髋关节置换术(total hip arthroplasty,THA)中的规划效果及其临床结果。方法:回顾性分析2022年3月至2022年11月连续性应用AI-HIP系统行初次单侧THA的36例患者的临床资料,男16例,女20例,年龄...目的:探讨AI-HIP辅助手术规划系统在初次单侧全髋关节置换术(total hip arthroplasty,THA)中的规划效果及其临床结果。方法:回顾性分析2022年3月至2022年11月连续性应用AI-HIP系统行初次单侧THA的36例患者的临床资料,男16例,女20例,年龄43~81(62.2±10.9)岁,将其纳入AI-HIP组;根据配对原则选择同期采用传统模板方法规划的患者36例,男16例,女20例,年龄40~80(60.9±12.1)岁,作为对照组。比较两组假体的准确率,以及术前规划和术后实际联合偏心距差值、下肢长度差值、距小转子上缘截骨高度和顶肩距以评价规划效果,采用Harris评分和疼痛视觉模拟评分(visual analogue scale,VAS)评价其临床疗效。结果:两组均获得随访,时间12~18(14.5±2.1)个月。AI-HIP组规划髋臼杯和股骨柄假体型号的完全准确率、近似准确率分别为72.2%、100%和58.3%、88.9%,均优于对照组的44.4%、83.3%和33.3%、66.7%(P<0.05);规划股骨头假体型号差异无统计学意义(P>0.05)。AI-HIP组术后实际联合偏心距差值、联合偏心距差值(实际-规划)分别为1.0(0.2,2.4)mm、1.1(-2.1,3.2)mm,优于对照组的3.0(1.4,4.9)mm、3.5(-1.6,6.5)mm(P<0.05)。两组间术后实际距小转子上缘截骨高度比较,差异无统计学意义(P>0.05)。AI-HIP组术后实际下肢长度差值、下肢长度差值(实际-规划)、距小转子上缘截骨高度(实际-规划)、术后实际顶肩距、顶肩距差值(实际-规划)分别为1.5(0.2,2.8)、1.1(-0.3,2.2)、2.1(-2.3,4.1)、(15.3±4.1)、-2.2(-4.8,0.3)mm,优于对照组的2.6(1.3,4.1)、2.5(0.3,3.8)、5.8(-2.4,7.7)、(13.0±4.3)、-5.7(-9.4,-2.2)mm(P<0.05)。末次随访,两组Harris评分中功能、疼痛、功能、畸形、总分及VAS比较,差异均无统计学意义(P>0.05);而AI-HIP组Harris评分中活动度评分(4.8±0.6)分,高于对照组(4.4±0.8)分(P<0.05)。结论:AI-HIP辅助手术规划系统较传统模板规划,在初次单侧THA中对髋臼杯和股骨柄假体型号的预测、恢复联合偏心距、规划下肢长度、截骨高度和顶肩距方面具有良好的准确性,临床效果满意。展开更多
针对基本交换的安全性和时间开销的正反两个方面,论述了密题计算机制,利用不同的组网方式测量了基本交换的时间开销,通过计算样本均值和标准差分析了其性能的优劣,提出了HIP BE Anti-Spam模型体系结构。该结构根据HIP基本交换的特点及...针对基本交换的安全性和时间开销的正反两个方面,论述了密题计算机制,利用不同的组网方式测量了基本交换的时间开销,通过计算样本均值和标准差分析了其性能的优劣,提出了HIP BE Anti-Spam模型体系结构。该结构根据HIP基本交换的特点及其内建的密题机制,结合出站和入站的双重过滤来防范和阻止垃圾邮件;利用HIP基本交换机制增大垃圾邮件发送源头的代价和成本,防御对邮件服务的DoS攻击,明确了进一步优化HIP BE Anti-Spam模型及算化的研究方向。展开更多
Background: The purpose of this study was to compare the frequency of femoroacetabular impingement(FAI) between matched groups of military veterans and civilian patients with end-stage hip osteoarthritis(OA).Methods: ...Background: The purpose of this study was to compare the frequency of femoroacetabular impingement(FAI) between matched groups of military veterans and civilian patients with end-stage hip osteoarthritis(OA).Methods: Patients who underwent a primary total hip arthroplasty(THA) between January 1, 2015 and December 31, 2015 at a single Veteran’s Affairs Hospital were identified. Veterans were then matched 1:2 with civilian patients from our prospective outcome registry. The alpha angle and lateral center-edge angle(LCEA) were measured by a single evaluator. Independent t-tests were used to compare joint angles, and Fisher exact tests were used to compare the prevalence of cam(alpha angle ≥60°), pincer(LCEA ≥40°), or mixed-type pathologies.Results: Twenty-one veterans were matched 1:2 with civilian patients. The mean alpha angle did not significantly differ between groups(P=0.33) nor did the prevalence of cam deformities(P=0.79). The LCEAs were significantly greater in veterans than in civilians(P=0.04), and veterans also demonstrated a significantly greater prevalence of pincer and mixed-type deformities than civilians(P=0.025 and P=0.004, respectively).Conclusions: These results suggest that FAI is perhaps a more common mechanism in the progression of OA in a veteran population than in a civilian population, as pincer and mixed-type deformities were significantly more common among veterans than civilians. The forces borne by the hip during military training exceed normal physiologic conditions. In addition, the time between symptom onset and surgical correction may be 10–12 months longer for active military personnel than for civilians. The combination of increased physical demands and a protracted time to treatment highlights the need for better recognition of FAI in military members. Future studies are necessary to determine whether earlier intervention may prevent or delay the progression to end-stage OA and the need for total hip arthroplasty.展开更多
对11个品牌42种的特等(级)面粉,进行无机磷含量测定,结果表明:符合高无机磷(HIP)含量的样品占71.4%,多数品牌不同批次面粉的无机磷含量不一致,具有一定的随机性,在1年贮藏期内面粉的HIP分布变化很小。取其1个批次的11种面粉及其面团,在6...对11个品牌42种的特等(级)面粉,进行无机磷含量测定,结果表明:符合高无机磷(HIP)含量的样品占71.4%,多数品牌不同批次面粉的无机磷含量不一致,具有一定的随机性,在1年贮藏期内面粉的HIP分布变化很小。取其1个批次的11种面粉及其面团,在60℃、80℃和100℃水浴锅中,分别进行15 min和30min的高温处理,结果表明:在15 min 80℃和100℃的处理以及30 min各个温度的处理下的面团,无机磷含量有所升高,但幅度较小,HIP分布变化不大。展开更多
文摘目的:探讨AI-HIP辅助手术规划系统在初次单侧全髋关节置换术(total hip arthroplasty,THA)中的规划效果及其临床结果。方法:回顾性分析2022年3月至2022年11月连续性应用AI-HIP系统行初次单侧THA的36例患者的临床资料,男16例,女20例,年龄43~81(62.2±10.9)岁,将其纳入AI-HIP组;根据配对原则选择同期采用传统模板方法规划的患者36例,男16例,女20例,年龄40~80(60.9±12.1)岁,作为对照组。比较两组假体的准确率,以及术前规划和术后实际联合偏心距差值、下肢长度差值、距小转子上缘截骨高度和顶肩距以评价规划效果,采用Harris评分和疼痛视觉模拟评分(visual analogue scale,VAS)评价其临床疗效。结果:两组均获得随访,时间12~18(14.5±2.1)个月。AI-HIP组规划髋臼杯和股骨柄假体型号的完全准确率、近似准确率分别为72.2%、100%和58.3%、88.9%,均优于对照组的44.4%、83.3%和33.3%、66.7%(P<0.05);规划股骨头假体型号差异无统计学意义(P>0.05)。AI-HIP组术后实际联合偏心距差值、联合偏心距差值(实际-规划)分别为1.0(0.2,2.4)mm、1.1(-2.1,3.2)mm,优于对照组的3.0(1.4,4.9)mm、3.5(-1.6,6.5)mm(P<0.05)。两组间术后实际距小转子上缘截骨高度比较,差异无统计学意义(P>0.05)。AI-HIP组术后实际下肢长度差值、下肢长度差值(实际-规划)、距小转子上缘截骨高度(实际-规划)、术后实际顶肩距、顶肩距差值(实际-规划)分别为1.5(0.2,2.8)、1.1(-0.3,2.2)、2.1(-2.3,4.1)、(15.3±4.1)、-2.2(-4.8,0.3)mm,优于对照组的2.6(1.3,4.1)、2.5(0.3,3.8)、5.8(-2.4,7.7)、(13.0±4.3)、-5.7(-9.4,-2.2)mm(P<0.05)。末次随访,两组Harris评分中功能、疼痛、功能、畸形、总分及VAS比较,差异均无统计学意义(P>0.05);而AI-HIP组Harris评分中活动度评分(4.8±0.6)分,高于对照组(4.4±0.8)分(P<0.05)。结论:AI-HIP辅助手术规划系统较传统模板规划,在初次单侧THA中对髋臼杯和股骨柄假体型号的预测、恢复联合偏心距、规划下肢长度、截骨高度和顶肩距方面具有良好的准确性,临床效果满意。
文摘针对基本交换的安全性和时间开销的正反两个方面,论述了密题计算机制,利用不同的组网方式测量了基本交换的时间开销,通过计算样本均值和标准差分析了其性能的优劣,提出了HIP BE Anti-Spam模型体系结构。该结构根据HIP基本交换的特点及其内建的密题机制,结合出站和入站的双重过滤来防范和阻止垃圾邮件;利用HIP基本交换机制增大垃圾邮件发送源头的代价和成本,防御对邮件服务的DoS攻击,明确了进一步优化HIP BE Anti-Spam模型及算化的研究方向。
文摘Background: The purpose of this study was to compare the frequency of femoroacetabular impingement(FAI) between matched groups of military veterans and civilian patients with end-stage hip osteoarthritis(OA).Methods: Patients who underwent a primary total hip arthroplasty(THA) between January 1, 2015 and December 31, 2015 at a single Veteran’s Affairs Hospital were identified. Veterans were then matched 1:2 with civilian patients from our prospective outcome registry. The alpha angle and lateral center-edge angle(LCEA) were measured by a single evaluator. Independent t-tests were used to compare joint angles, and Fisher exact tests were used to compare the prevalence of cam(alpha angle ≥60°), pincer(LCEA ≥40°), or mixed-type pathologies.Results: Twenty-one veterans were matched 1:2 with civilian patients. The mean alpha angle did not significantly differ between groups(P=0.33) nor did the prevalence of cam deformities(P=0.79). The LCEAs were significantly greater in veterans than in civilians(P=0.04), and veterans also demonstrated a significantly greater prevalence of pincer and mixed-type deformities than civilians(P=0.025 and P=0.004, respectively).Conclusions: These results suggest that FAI is perhaps a more common mechanism in the progression of OA in a veteran population than in a civilian population, as pincer and mixed-type deformities were significantly more common among veterans than civilians. The forces borne by the hip during military training exceed normal physiologic conditions. In addition, the time between symptom onset and surgical correction may be 10–12 months longer for active military personnel than for civilians. The combination of increased physical demands and a protracted time to treatment highlights the need for better recognition of FAI in military members. Future studies are necessary to determine whether earlier intervention may prevent or delay the progression to end-stage OA and the need for total hip arthroplasty.
文摘对11个品牌42种的特等(级)面粉,进行无机磷含量测定,结果表明:符合高无机磷(HIP)含量的样品占71.4%,多数品牌不同批次面粉的无机磷含量不一致,具有一定的随机性,在1年贮藏期内面粉的HIP分布变化很小。取其1个批次的11种面粉及其面团,在60℃、80℃和100℃水浴锅中,分别进行15 min和30min的高温处理,结果表明:在15 min 80℃和100℃的处理以及30 min各个温度的处理下的面团,无机磷含量有所升高,但幅度较小,HIP分布变化不大。
