Utility and Prognostic Ability of a Diagnostic Injection Before Revision Total Knee Arthroplasty

BackgroundDiagnostic injections are commonly utilized in the workup of painful total knee arthroplasties (TKA), particularly when the diagnosis remains unclear. However, current literature provides limited evidence regarding the utility and prognostic capability of anesthetic injections in this scenario. This study sought to establish the role of diagnostic injections in predicting successful revision TKA.MethodsA retrospective review was conducted on 144 consecutive aseptic revision TKAs receiving diagnostic anesthetic injections. Instability (57.6%) and aseptic loosening (33.3%) comprised most revision etiologies. Patient-reported percentage pain relief after the injection was statistically correlated with KOOS JR, Knee Society Score, UCLA Activity Level, and satisfaction scores.ResultsAbout 74.3% (107/144) of revision TKAs reported >50% pain relief after injection. There were no differences in pain relief based on revision indication (P = .841). Improvement from preoperative activity level was greater in the >50% pain relief group (P = .024). Four-month patient satisfaction did not differ between patients who reported >50% and ≤50% pain relief (67% vs. 66%, P = .130). About 64% of patients who reported >50% pain relief were satisfied at minimum 1-year follow-up, compared with only 47% of those who reported ≤50% pain relief after diagnostic injection (P < .001).ConclusionStudy results show that patients reporting >50% pain relief after diagnostic injection have improvements in activity level and maintain greater satisfaction at minimum 1-year than those reporting ≤50% pain relief. Expectations for improvement after revision TKA should be tempered if diagnostic anesthetic injection yields minimal subjective pain relief.     

血必净注射液联合利奈唑胺治疗重症肺炎有效性及安全性的Meta分析

目的 评价血必净注射液联合利奈唑胺治疗重症肺炎的有效性与安全性。方法 检索中国知网（CNKI）、万方数据库（Wanfang）、维普数据库（VIP）、中国生物医学文献数据库（CBM）、Cochrane Library、PubMed、Web of Science和Embase数据库,检索时限为各数据库建库至2022年6月,收集血必净注射液联合利奈唑胺治疗重症肺炎的随机对照试验,采用Review Manager 5.4.1对纳入文献进行质量评价、数据整合分析和偏倚风险评估;Stata14.0进行敏感性分析。结果 共纳入12项随机对照试验,涉及949例患者,观察组478例,对照组471例。Meta分析结果显示,观察组的临床总有效率[RR=1.24, 95%CI (1.18, 1.31), P<0.000 01]、细菌清除率[RR=1.38, 95%CI (1.22, 1.55), P<0.000 01]显著高于对照组。观察组的血常规恢复正常时间[MD=-1.38, 95%CI (-1.55,-1.20), P<0.000 01]、体温恢复正常时间[MD=-1.68, 95%C...     

Small animal jet injection technique results in enhanced immunogenicity of hantavirus DNA vaccines

DNA vaccine evaluation in small animals is hampered by low immunogenicity when the vaccines are delivered using a needle and syringe. To overcome this technical hurdle we tested the possibility that a device developed for human intradermal medicine delivery might be adapted to successfully deliver a DNA vaccine to small animals. Disposable syringe jet injection (DSJI) does not currently exist for small animals. However, a commercialized, human intradermal device used to to administer medicines to the human dermis in a 0.1 mL volume was evaluated in Syrian hamsters. Here, we found that hantavirus DNA vaccines administered to hamsters using DSJI were substantially more immunogenic than the same vaccines delivered by needle/syringe or particle mediated epidermal delivery (gene gun) vaccination. By adjusting how the device was used we could deliver vaccine to either subcutaneous tissues, or through the skin into the muscle. RNA and/or antigen expression was detected in epidermal, subepidermal and fibroblast cells. We directly compared six optimized and non-optimized hantavirus DNA vaccines in hamsters. Optimization, including codon-usage and mRNA stability, did not necessarily result in increased immunogenicity for all vaccines tested; however, optimization of the Andes virus (ANDV) DNA vaccine protected vaccinated hamsters from lethal disease. This is the first time active vaccination with an ANDV DNA vaccine has shown protective efficacy in the hamster model. The adaptation of a human intradermal jet injection device for use as a method of subcutaneous and intramuscular jet injection of DNA vaccines will advance the development of nucleic acid based medical countermeasures for diseases modeled in hamsters.     

The parabiliary venous system

Summary The parabiliary venous system originates from the pancreatico-duodenal and pyloro-duodenal veins, runs along the common bile-duct and the hepatic artery, and divides in the liver hilum into a venous network within the hilar plate. Embryologically, this system, apparently independent of the portal vein, develops together with the bile-ducts and the hepatic artery: these three structures are within the substance of the vasculo-biliary sheaths, and the whole complex invades the liver well after the distribution of the portal vein has been established. It should be pointed out that segments I and IV also appear rather late. Seventy-four specemins with injection of the system have been studied. The hilar plexus sends branches to the veins of the segments adjacent to the hilum. Some vessels directly supply the inferior surface of the quadrate lobe or the caudate lobe, or the left lobe. In 46.50% of specemins, part of the cystic veins are anastomosed with the Parabiliary system.

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Le système veineux parabiliaire

Résumé Le système veineux parabiliaire prend origine dans les veines pancréatico-duodénales et pyloro-duodénales, monte le long de la voie biliaire et l'artère hépatique, et se termine dans le hile dans un lascis veineux situé dans la plaque hilaire. Embryologiquement il semble étranger à la formation de la veine porte, se constitue en même temps que les canaux biliaires et les artères intra-hépatiques: ces trois éléments sont situés dans la texture même des enveloppes vasculo-biliaires, et le tout envahit le foie bien après la pénétration de la veine porte. L'étude porte sur 74 foies dans lesquels le système s'est trouvé injecté. Le plexus hilaire envoie des collatérales qui se jettent dans les veines des segments adjacents au hile. Mais certaines branches irriguent directement la face inférieure du lobe carré, ou le lobe gauche. Dans 46,50% des cas, une partie des veines cystiques se jettent dans ce système.

     

孤束核内鼓索传入味觉神经元的形态与功能的关系

雄性SD大鼠54只，体重250～300g，用细胞内记录和细胞内注射的方法，将灌注的（2％NB溶于0.1mol／LKCl，pH7．4）记录电极（尖端直径80～100nm，电阻60～100MΩ）置于孤束核吻侧部，同时用味素（盐，酸，糖，苦）灌洗舌。在完成生理学记录、确认其至少对一种味素起反应后，进行细胞内注射．成色反应证明71个吻例孤束核味觉神经元被标记．标记神经元经三维重组系统重组后，依据细胞体积、胞体面积、树突节段平均长度、膨体密度、树突棘密度和初级树突数量等六个形态学特征，进行统计学（ANOVA）定量分析，将标记细胞分为A，B，C，D，E，F六类．每类细胞至少有一个形态学特征与其它五类有显著的不同．本研究还发现味谱值与标记细胞的大小及树突分校点的数量呈正相关而与树突棘密度呈负相关；对四种基本味素反应的标记细胞数量依次为盐＞酸＞甜＞苦；C类神经元的味谱值较小；单纯对苦（Quinine）反应的神经元与单纯对其它三种味素反应的神经元相比，具有胞体小、树突在冠状和矢状切面上的扩展范围小、树突整体接受面积也小的特征；在对盐类反应的神经元中，单纯氯化钠反应神经元与对所有盐类都反应的神经元相比，具有胞体表面积大、树突接受区域大、树突总长度长及在水平切面上吻尾扩展长的特点。此结果为?     

Intracytoplasmic sperm injection in the mouse

Intracytoplasmic sperm injection (ICSI) into mouse oocytes involvesa very low survival rate. This study was designed to determinewhy ICSI frequently fails in mice. Metaphase II oocytes wereobtained from superovulated 4–6 week old F₁ hybrid mice.Spermatozoa were retrieved from the epididymis of 12–14week old F₁ hybrid mice. The spiked microinjection pipette usedto inject a spermatozoon into the ooplasm had outer and innerdiameters of 10 and 8 µm respectively. The oocytes usedin the first part of the study were not activated (group 1).Some oocytes were incubated with calcium ionophore for 5 min(group 2). The injected oocytes were evaluated 6, 20, 48 and72 h after injection. A total of 143 eggs in each group underwentICSI. In group 1, sperm heads escaped into the perivitellinespace. In all, 63 (47%) of the remaining oocytes were damagedduring the injection or had degenerated by the first evaluation.The survival rate was 53%, but fertilization did not occur.In group 2, 31 oocytes (22%) were damaged during microinjectionor soon degenerated. Two oocytes underwent accidental subzonalinsemination. Six oocytes were fertilized (4.2%) among the 78%of survivors. After injection, the sperm tail was found in thecytoplasm (27 and 31% in groups 1 and 2 respectively), the perivitellinespace (45% in both groups) or protruding through the zona pellucida(28 and 23% respectively). More oocytes degenerated when thetail remained in the cytoplasm, i.e. 78% in group 1 and 36%in group 2.     

黄芪注射液不良反应的病例汇总

黄芪射液目前被临床广泛用于抗病毒,调节免疫治疗。近年来报道的黄芪注射液不良反应有迟发性严重静脉炎、过敏性休克、少尿、药物热、溶血性贫血、喉头水肿、急性荨麻疹、剧烈头痛等。提示临床应用中应当予以重视。     

Vitreoretinal toxicity of basic fibroblast growth factor

Basic fibroblast growth factor (b-FGF) is one of the multifunctional growth factors with important therapeutic potential in the field of ophthalmology. It is also implicated in pathogenesis of vitreoretinal proliferative diseases. In the present study, we evaluated its vitreoretinal toxicity by means of clinical observation, electroretinography (ERG), and histopathology after injection of different doses of b-FGF into the vitreous of rabbit eyes. Doses of b-FGF up to 2 g per eye caused no toxicity; however, injection of 4 g or more resulted in sight-threatening vitreoretinal proliferative changes. This information is important for studies aimed at evaluating the therapeutic potential of b-FGF in retinal diseases.Despite some degree of vitreous organization and opacification, retinal folds, and small areas of traction retinal detachment, the amplitudes of ERGs were normal or even increased (hyperpolarization) in eyes which received 8 g of b-FGF.     

注射用克林霉素磷酸酯的稳定性研究

目的：对影响注射用克林霉素磷酸酯稳定性的各种因素进行考察,方法：采用高效液相色谱法测定注射用克林霉素磷酸酯的稳定性。结果：温度对本制剂稳定性有影响,对光稳定性较好。结论：本制剂应于凉暗干燥处贮存。