A novel way to dynamize a spatial frame and optimize fracture healing

BackgroundFracture site motion creates mechanical strains on the healing tissues which influences bone formation. Axial micro-motion maximizes dilatational strains, whereas shearing motions maximize deviatoric strains on the healing tissues. Dilatational strains optimize bone healing, deviatoric strains retard bone healing. Dynamization of external fixation using either an Ilizarov or Spatial Frame platform is used to increase loading on the limb which increases the mechanical stress and strain on the tissues to improve healing. The scientific literature does not address how dynamization of the spatial frame effects fracture site motion. The purpose of this study is to assess the effect of modified shoulder bolts incorporated into a spatial frame during dynamic loading.MethodsFive identical two-ring spatial frame constructed were mounted on Sawbones tibias with an osteotomy performed distal to the tibial tubercle. Sinusoidal load was applied at a rate of 0.25 Hz. Axial force and displacement, in addition to motion of the proximal and distal tibia segments were recorded. Eight constructs were tested: 1) All struts of the Spatial Frame rigid, 2) Strut #1 loose, 3) Struts #1 and #3 loose, 4) Struts #1, #3 and #5 loose, 5) All struts loose, 6) All struts rigid with dynamization bolts on the proximal end, 7) All struts rigid with dynamization bolts on alternating sides, 8) Threaded rods between the rings with two millimeters of dynamization.ResultsNo difference in vertical displacement was observed between the Ilizarov and all struts locked. No significant difference in shear values between all struts locked and modified shoulder bolt struts was observed. Increase in vertical movement with the modified shoulder bolts was an average of 1.83 mm. Significant shear forces at the fracture site were observed with unlocking single or multiple struts of the spatial frame.ConclusionModified shoulder bolts can be used for spatial frame dynamization without increasing shear motion.     

A systematic review of the “Logsplitter” injury: how much do we know?

BackgroundAs an emerging proposed type of ankle joint injury, the concept of logsplitter injury is a unified overview of the high-energy ankle fracture and dislocation accompanied by distal tibiofibular syndesmosis separation and displacement. Since the concept of logsplitter injury is still relatively novel, there is no uniform standard for its clinical classification, diagnosis and treatment currently. Thus, we reviewed previous literatures here to provide certain references for its better clinical diagnosis and treatment in future.MethodsThe available literatures from January 1985 to June 2020 in five medical databases were searched and analyzed. The original articles that evaluated the outcomes of patients treated surgically for the logsplitter injury were included. The detailed data were then extracted from each research, including the researchers, type of study, level of evidence, type of center research, groups, number of patients, gender, age, causes of injury, time from injury to surgery, operative time, intraoperative blood loss, length of follow-up, postoperative complications and clinical outcomes. The overall search procedures were performed by the two independent reviewers.ResultsSeven pieces of researches (199 patients) were eligible for inclusion. All researches were either retrospective or prospective study, and all but one was single center study. Falling from height ranked first in the causes of injury (52.8%), and followed by the traffic accidents (29.6%). Clinical outcomes were all measured using the American Orthopaedic Foot and Ankle Society (AOFAS) score, and the mean AOFAS score at the final follow-up was 77.9 points.ConclusionsNone of the definitive consensuses exists on how logsplitter injury should be diagnosed and surgically managed. In light of the novel concept, short presentation time and numerous postoperative complications, the logsplitter injury has not been well understood by most surgeons currently, and its overall situation still needs to be supported by a larger sample size of multicenter research in the future.     

知识点模块网格化模型在肾内科实习生带教中的应用

目的 运用知识点模块网格化构建带教模型，观察其在肾内科实习生中的应用效果。方法 根据《内科学》（第八版）肾内科教学大纲要求，结合肾内科病房常见病、多发病的临床特点，精心挑选相关知识点，以理论为支撑点，以服务于实习带教工作为靶目标，各个知识点之间有临床的关联性，最终形成网格化的诊治分 析模型。将血尿、蛋白尿、高血压、水肿、肾小球滤过率为切入点，设定肾病综合征、系统性红斑狼疮、糖尿病肾病和急、慢性肾功能衰竭为临床知识必须掌握点，从病史、症状、体征和实验室检查几方面来培养实习生的诊疗思维，并通过知识点来关联疾病的诊治，从而帮助他们在有限的肾内科实习期间尽可能掌握肾内科临床知识。结果 本研究开展一年以来，对于来肾内科轮转的51 名实习生进行了模块网格化模型训练，实习生普遍反映该模型有很好的学习效果，让他们了解了肾内科临床重点，并能和理论学习的知识点有机融合在一起，开阔了实习生的诊疗视野，也便于对其他科知识点的学习。结论 基于知识点模块网格化，构建模型在肾内科实习生中有很好的带教作用，学生接受肾内科知识点的记忆增强，并能进一步推广到内科其他内容的实习带教中。     

少腹逐瘀汤联合孕三稀酮治疗子宫内膜异位症前瞻性研究

目的:探讨少腹逐瘀汤联合西药保守治疗子宫内膜异位症的临床价值。方法:我院诊治的80例子宫内膜异位症患者为研究对象,按随机双盲分组原则分为观察组和对照组,各40例。两组均给予孕三稀酮进行治疗,观察组在此基础上加用少腹逐瘀汤。对比两组临床疗效,记录两组治疗前后中医症状评分、血液流变学(血浆黏度、全血高切黏度、全血低切黏度、红细胞沉降速率、红细胞聚集指数、纤维蛋白原)及外周血糖类抗原125(CA125)含量,并观察两组在治疗期间不良反应发生情况。结果:观察组临床总有效率90.00%显著高于对照组72.50%,差异有统计学意义(P<0.05)。两组治疗后痛经、腰骶肛门坠胀、月经周期、经期、形寒肢冷症状评分较治疗前显著降低(P<0.05); 观察组治疗后痛经、腰骶肛门坠胀、月经周期、经期、形寒肢冷症状评分显著低于对照组(P<0.05)。观察组治疗后血液流变学指标及外周血CA125含量显著低于对照组(P<0.05)。结论:采用少腹逐瘀汤联合孕三稀酮治疗子宫内膜异位症,能提高临床疗效,减轻患者临床症状,加快病情康复。     

染色体1q22区域遗传变异影响胃癌易感性的生物学机制研究

  目的  探索染色体1q22区域易感基因在胃癌发生中的作用和机制。  方法  基于genotype-tissue expression（GTEx）数据库，鉴定候选易感基因；通过人群样本进行基因差异表达分析，并通过细胞和动物实验探究易感基因在胃癌发生中的作用；通过全转录组测序探究候选易感基因在胃癌发生中参与的下游通路和机制。  结果  表达数量性状基因座（expression quantitative trait loci，eQTL）分析证实rs760077基因型与THBS3、GBA和GBAP1基因的表达水平均显著相关（P值分别为1.20×10-21，1.80×10-4和3.49×10-17）。差异表达分析和功能学实验证实GBAP1在胃癌组织中呈现高表达状态，并且敲低GBAP1后能够显著抑制胃癌细胞增殖能力。全转录组测序表明GBAP1能够影响PHGDH、PSAT1和PSPH基因的表达水平并参与包括甘氨酸、丝氨酸、苏氨酸代谢和一碳代谢在内的多种代谢通路。  结论  本研究证实1q22区域的遗传变异可以通过调控促癌基因GBAP1的表达，影响氨基酸合成代谢通路关键酶基因PHGDH、PSAT1和PSPH的表达，从而促进胃癌的发生。      

磁共振结合高分辨率CT在中耳乳突炎患者术前评估中的临床应用

目的探讨磁共振结合高分辨率CT在中耳乳突炎患者术前评估中的临床应用。方法选取我院2018年11月~2020年12月接收患有中耳乳突炎的患者40例为研究对象,所有患者均采用磁共振以及高分辨率CT进行诊断检查,比较两组患者诊断后手术特征显示度。结果诊断后,磁共振联合高分辨率CT检查图像显示度高于单独使用磁共振或高分辨率CT诊断(P<0.05)。结论使用磁共振结合高分辨率CT对中耳乳突炎患者进行术前评估,显示度较高,提高诊断准确度,值得推广。     

经内镜黏膜下剥离术治疗直肠神经内分泌肿瘤的疗效及安全性CSCD

目的探讨经内镜黏膜下剥离术(ESD)治疗直肠神经内分泌肿瘤(RNET)的疗效,并评估其安全性。方法回顾性分析2011年1月—2017年12月在江苏省人民医院行直肠ESD治疗、经病理及免疫组织化学确诊为RNET的80例患者(91处病变)的临床资料,并对患者进行随访。结果所有病变均为完整切除病灶。有症状的患者术后3天~2月症状均有不同程度缓解,无严重术后并发症,标本切缘阳性率20.88%(19/91),切缘可疑阳性率35.16%(32/91)。切除标本最大长径20 mm。单因素分析中,肿瘤长径≥10 mm、肿瘤处于G2级与切缘可疑阳性及阳性相关(P<0.05)。肿瘤处于G2级为切缘可疑阳性及阳性的独立危险因素。仅有1例患者术前证实为RNET。中位随访时间34月,复发率4.40%(4/91)。结论ESD在治疗直径<20 mm的G1级和G2级的RNET患者中具有良好疗效。对于ESD术后显示切缘阳性及可疑阳性的RNET患者,可密切随访暂不实施其他治疗。     

表浅型食管癌经内镜黏膜下剥离术导致非治愈性切除的危险因素及长期生存分析

Objective To identify risk factors of non-curative resection in superficial esophageal cancer (SEC) after endoscopic submucosal dissection and to evaluate the prognosis. Methods We retrospectively analyzed the data of 207 SEC patients who received ESD. The median follow-up was 48 months. Results The en bloc resection rate was 89.25% (191/214), the complete resection rate was 80.84 % (173/214), the curative resection rate was 70.09% (150/214) and the non-curative resection rate was 29.91% (64/214). The maximum long diameter of specimen was 110 mm. Age, gender, tumor size, lesions performance during surgery and operation time were associated with the non-curative resection (P<0.05). Female, lesion diameter≥50mm and poorly performed lesions were identified as significant risk factors for non-curative resection. In the noncurative resection group, there was no difference in cancer-free survival and survival between patients who had no additional treatmeat after ESD and those who underwent surgery or radiotherapy. Conclusion For patients with poor general condition who are not willing to undergo surgery or chemoradiotherapy, regular endoscopy seems to be an option. © 2020, CHINA RESEARCH ON PREVENTION AND TREATMENT. All rights reserved.     

基于QoR-15评分系统的加速康复外科模式在肝门部胆管癌术后患者中的应用

目的探讨基于15项恢复质量(QoR-15)量表的加速康复外科模式应用于肝门部胆管癌术后的临床价值。方法分析2016年1月至2020年1月于南京医科大学附属淮安第一医院进行肝门部胆管根治术的102例患者临床资料,按患者入院先后顺序分为观察组49例和对照组53例,其中观察组采用基于QoR-15评分系统的加速康复外科模式,对照组则为常规治疗组。比较两组患者术前、术中的基本资料,及术后住院时间、住院总费用、并发症、医疗满意度、术后恢复质量等方面,评价其临床价值。结果两组患者术前基本资料差异无统计学意义,具有可比性(P>0.05);在手术时间、术中出血量方面两组比较差异无统计学意义(P>0.05);观察组患者在术后住院时间、住院总费用、医疗满意度、并发症方面优于对照组,两组比较差异有统计学意义(均P<0.05);其中观察组在术后第3天、第7天QOR-15评分明显高于对照组(P<0.05)。结论于肝门部胆管癌术后应用基于QoR-15的加速康复外科模式可以有效缩短住院时间,减少住院费用,降低术后并发症及加快患者的康复,同时增进医患沟通。