Mixed Reality Combined with Three‐Dimensional Printing Technology in Total Hip Arthroplasty: An Updated Review with a Preliminary Case Presentation

Three‐dimensional (3D) printing technology, virtual reality, and augmented reality technology have been used to help surgeons to complete complex total hip arthroplasty, while their respective shortcomings limit their further application. With the development of technology, mixed reality (MR) technology has been applied to improve the success rate of complicated hip arthroplasty because of its unique advantages. We presented a case of a 59‐year‐old man with an intertrochanteric fracture in the left femur, who had received a prior left hip fusion. After admission to our hospital, a left total hip arthroplasty was performed on the patient using a combination of MR technology and 3D printing technology. Before surgery, 3D reconstruction of a certain bony landmark exposed in the surgical area was first performed. Then a veneer part was designed according to the bony landmark and connected to a reference registration landmark outside the body through a connecting rod. After that, the series of parts were made into a holistic reference registration instrument using 3D printing technology, and the patient's data for bone and surrounding tissue, along with digital 3D information of the reference registration instrument, were imported into the head‐mounted display (HMD). During the operation, the disinfected reference registration instrument was installed on the selected bony landmark, and then the automatic real‐time registration was realized by HMD through recognizing the registration landmark on the reference registration instrument, whereby the patient's virtual bone and other anatomical structures were quickly and accurately superimposed on the real body of the patient. To the best of our knowledge, this is the first report to use MR combined with 3D printing technology in total hip arthroplasty.     

(-)-Epigallocatechin-3-gallate,reduces corneal damage secondary from experimental grade II alkali burns in mice

Background

Since recent reports have shown that (-)-Epigallocatechin-3-gallate (EGCG) could be used for treating proliferative and inflammatory disorders, we explored its use for the management of corneal chemical burns.

白内障围手术期结膜囊菌群分布及药敏试验

目的 分析白内障围手术期结膜囊菌群的分布及药敏试验结果。方法 选取264例白内障患者,分别在患者入院后、手术消毒前、手术消毒后、手术结束后四个时间点取样,进行细菌培养及药敏试验,比较不同时期的细菌培养结果和药敏结果。结果 入院后结膜囊细菌培养阳性率明显高于手术消毒前、手术消毒后及手术结束后;入院后结膜囊细菌培养以表皮葡萄球菌为主;革兰氏阳性球菌对头孢西丁、加替沙星、左氧氟沙星等敏感性较高。结论 表皮葡萄球菌是结膜囊最常见的细菌,术前应常规应用抗生素点眼,聚维酮碘冲洗结膜囊等来预防术后感染性眼内炎。     

2016至2018年某医院真菌血流感染者流行病学特征及耐药性分析

目的分析真菌性血流感染的病原菌分布以及耐药特征，为真菌血流感染的早期合理用药提供理论依据。 方法回顾性分析武汉大学人民医院2016年1月至2018年12月收治的真菌性血流感染者的菌群、科室分布以及耐药性。 结果入组192例真菌血流感染者的血培养样本中共分离192株真菌，其中白色念珠菌检出率为31.77%（61/192），其次热带念珠菌检出率为18.75%（36/192）；重症医学科检出率最高为33.85%（65/192）。所有菌株均对两性霉素B敏感，对其他抗菌药物耐药率分别为5-氟胞嘧啶4.49%（9/192）、伊曲康唑5.73%（11/192）、氟康唑10.94%（21/192）和伏立康唑11.46%（22/192）；除两性霉素B外，2016至2018年真菌对其他抗菌药物的耐药率均逐年上升，其中2018年所分离192株光滑念珠菌对伊曲康唑耐药菌率达46.7%。 结论真菌血流感染病原菌以念珠菌属为主，对目前抗真菌药物具有较高敏感性，但耐药率逐年上升，加强监测血培养病原菌变化及耐药趋势对指导临床用药至关重要。     

中华传统文化视角下疾病终末期患者尊严模型解析

目的:解析加拿大Chochinov疾病终末期患者尊严模型在中华文化情境下的适用性,并基于此对模型进行调适。方法:采用内容分析法,按照选定分析范围、抽取样本、确定分析单位和分析框架、资料分析四步完成。首先检索中、英文数据库中以中华文化背景下临终尊严为主题的文献,然后以尊严模型为框架对文献内容进行编码、归纳和分析。结果:尊严模型包含的多数主题符合我国临终患者的认知,如身体功能、医疗不确定性、死亡焦虑、隐私界限、照护要旨、他人负担、后事担忧等。但也出现了矛盾的主题,如忍受痛苦、自主性等,以及新的主题,包括家庭支持、病耻感和财务担忧。结论:加拿大版疾病终末期患者尊严模型并不完全符合中国文化,调适后的尊严模型更具我国文化特色,但仍需实证研究对模型进行验证。     

反复粪便培养金黄色葡萄球菌阳性老年患者口服万古霉素效果评价

目的 通过探讨肠道非急性感染期反复粪便培养金黄色葡萄球菌阳性的老年患者口服万古霉素的效果，为此类患者提供一种潜在的治疗方案。方法 前瞻性分析吉林大学第一医院干部病房2015 年9 月～2018 年12 月收治的186 例肠道非急性感染期反复粪便培养金黄色葡萄球菌阳性的老年患者。根据是否口服万古霉素治疗分为万古组和对照组。收集两组患者的一般临床资料，比较两组患者试验前后万古霉素血药浓度、血常规、降钙素原（PCT）、C 反应蛋白（CRP），试验期间粪便培养结果、体温、抗生素使用情况。结果 试验治疗期间，万古组便培养转阴率高于对照组，差异有统计学意义（P＜0.05）；万古组发热率（29.75%）低于对照组的34.77%，差异有高度统计学意义（P＜0.01）；万古组抗生素使用率（4.49%）低于对照组的19.23%，差异有高度统计学意义（P＜0.01）。试验前两组白细胞、中性粒细胞计数、中性粒细胞比例、PCT、CRP 比较，差异无统计学意义（P＞0.05）；试验后万古组白细胞、中性粒细胞计数、中性粒细胞比例、CRP 低于对照组，差异有高度统计学意义（P＜0.01）。试验后万古组白细胞、中性粒细胞计数、中性粒细胞比例、CRP 低于试验前，差异有高度统计学意义（P＜0.01）。结论 口服万古霉素可能提高肠道非急性感染期反复粪便培养金黄色葡萄球菌阳性的老年患者粪便转阴率，减少发热及抗生素的应用，降低炎症细胞水平，可能是此类患者一种潜在的临床治疗方案。