Y-configuration double-stent-retriever thrombectomy for refractory thrombus in middle cerebral artery bifurcation: A case report

Rationale:Stent retriever mechanical thrombectomy is a recommended treatment for acute ischemic stroke. However, refractory thrombus in artery bifurcation can reduce the rate of successful revascularization.Patient concerns:A 72-year-old male, owing to the acute onset of almost complete right-sided hemiplegia and global aphasia, received bridging therapy. National Institutes of Health Stroke Scale score was 16 at the time of admission.Diagnoses:Cerebral digital subtraction angiography revealed occlusion of the M1 segment of the left MCA.Interventions:Thrombectomy with 3 passes of the Solitaire FR device (Medtronic, Minneapolis, MN) was unsuccessful. Two stent retrievers were inserted in parallel by one microcatheter access point to each M2 branch, and then both stents were gradually retrieved out of the catheter while continuous suction was maintained.Outcomes:After thrombectomy, subsequent follow-up angiograms showed mTICI 3 reperfusion of MCA. The patient has mRS 2 at discharge and the 3-month mRS score after stroke is 1 score.Lessons:The presented Y-configuration double-stent-retriever thrombectomy technique constitutes a safe and effective rescue treatment method for refractory thrombus in MCA bifurcation.     

Prevalence and associated factors of periodontal conditions among 55- to 74-year-old adults in China: results from the 4th National Oral Health Survey

Clinical Oral Investigations - The purpose of this study was to assess periodontal health conditions among 55- to 74-year-old Chinese people and to analyze the factors associated with periodontal...     

腹腔注射法与吸入法建立急性一氧化碳中毒迟发性脑病动物模型的对比研究

目的对比腹腔注射法与吸入法建立急性一氧化碳(CO)中毒迟发性脑病(DEACMP)动物模型的致死率、发病率。 方法将336只180～230 g雄性wistar大鼠,采用随机数字表法分为腹腔注射法组(n＝80)、吸入法组(n＝240)、空白对照1,2组(每组n＝8),腹腔注射法组按150 ml/kg腹腔注射CO制备DEACMP动物模型,吸入法组按CO中毒不同剂量,分为低剂量1 000 ppm组(n＝80)(1 ppm＝1 mg/L)、中等剂量3 000 ppm组(n＝80)和高剂量4 000 ppm组(n＝80),空白对照1组腹腔注射等体积空气,空白对照2组放入充满空气的染毒箱内。动态监测尾血碳氧血红蛋白(HbCO)水平,并通过水迷宫检测DEACMP的发病。 结果3 000 ppm组、4 000 ppm组及腹腔注射组造模死亡率分别为37.5%(30/80)、61.3%(49/80)、40.0%(32/80)。3 000 ppm组死亡率低于4 000 ppm组,差异具有统计学意义(χ²＝9.03,P＝0.003);而与腹腔注射组比较,差异无统计学意义(χ²＝0.11,P＝0.746)。3 000 ppm组、4 000 ppm组及腹腔注射组DEACMP的发病率分别为40.0%(20/50)、41.9%(13/31)、14.6%(7/48)。3 000 ppm组DEACMP发病率高于腹腔注射组,差异有统计学意义(χ²＝7.93,P＝0.005);而与4 000 ppm组比较,差异无统计学意义(χ²＝0.03,P＝0.860)。 结论3 000 ppm吸入中毒法为最佳DEACMP造模方式。     

Association of IL-6 gene polymorphisms with cachexia susceptibility and survival time of patients with pancreatic cancer

The purpose of this study was to determine the predictive value of IL-6-572, -190, and -634 gene polymorphisms on the cachexia susceptibility and survival time of patients with pancreatic cancer. Genotypes were determined using restriction fragment length polymorphism analysis of polymerase chain reaction products. All of the subjects were homozygous to the C allele of IL-6-190. No significant differences were found in the IL-6-572G and -190C distributions between the cachexia group and the non-cachexia group. Patients with cachexia showed significantly higher prevalence of common bile duct obstruction (CBD) than those without (p = 0.026). A significantly increased frequency of the IL-6-634G allele was noted in the cachexia group vs the non-cachexia group (p = 0.021). Logistic regression adjusted for sex, age, duodenal obstruction, and CBD obstruction, the IL-6-634 CG + GG genotype was associated with an odds ratio of 2.785 (1.034, 7.501) for cachexia. Patients with IL-6-634 CG + GG carrier showed shorter duration of survival than those with CC genotype (p = 0.023). These results indicate that the IL-6-634G allele is associated with increased susceptibility to cachexia and decreased survival time of Chinese patients suffering from pancreatic cancer.     

巴戟天寡糖对心肌缺血再灌注损伤大鼠心功能的影响

目的:探讨巴戟天寡糖(MOO)对大鼠心肌缺血再灌注损伤(IRI)心功能的影响.方法:将48只Wistar大鼠随机分为假结扎组、IRI模型组、阳性对照组和MOO高、中,低剂量组,每组8只.阳性对照组给予地奥心血康0.7 g/kg,MOO 3个剂量组分别给予2.8、1.4及0.7 g/kg的MOO灌胃,假手术组和模型组按10 mL/kg给予蒸馏水灌胃,均1次/d,共7 d.末次给药1 h后,除假结扎组不结扎外,其他各组均结扎左冠状动脉前降支30 min,再灌注90 min.观察心功能、心肌Na+-K+-ATP酶、Ca2+-ATP酶、Mg2+-ATP酶及肌酸激酶(CK)等的变化.结果:6组大鼠左室收缩压、左室舒张期末压、左室内压最大变化速率及心肌酶谱比较差异均有统计学意义(P均＜0.001).与模型组相比,MOO各剂量组心功能均明湿改善,心肌组织中Na+-K+-ATP酶、Ca2+-ATP酶、Mg2+-ATP酶活性升高,而CK含量则降低(P＜0.001).结论:MOO有预防心肌IRI作用,其机制主要与防止钙超载有关.     

PEG10 Activation by Co-Stimulation of CXCR5 and CCR7 Essentially Contributes to Resistance to Apoptosis in CD19^＋CD34^＋ B Cells from Patients with B Cell Lineage Acute and Chronic Lymphocytic Leukemia

We investigated CD19~+CD34~+ and CD19~+CD34 B cells from cord blood (CB) and typical patients with B celllineage acute and chronic lymphocytic leukemia (B-ALL and B-CLL) in terms of expression and functions ofCXCR5/CXCL13 and CCR7/CCL19.CXCR5 and CCR7 were selectively frequent expressed on B-ALL,B-CLLand CB CD19~+CD34~+ B cells,but not on CD19~+CD34 B cells.Instead of induction of impressive chemotacticresponsiveness,CXCL13 and CCL19 together induced significant resistance to TNF-α-mediated apoptosis inB-ALL and B-CLL but not CB CD19~+CD34~+ B cells.B-ALL and B-CLL CD19~+CD34~+ B cells expressed elevatedlevel of Paternally Expressed Gene 10 (PEG10),and CXCL13 and CCL19 together significantly up-regulatedPEG10 expression in the cells.We found that CXCL13 and CCL19 together by means of activation of CXCR5and CCR7 up-regulated PEG10 expression and function,subsequent stabilized caspase-3 and caspase-8 inB-ALL and B-CLL CD19~+CD34~+ B cells,and rescued the cells from TNF-α-mediated apoptosis.We suggestedthat normal lymphocytes,especially naive B and T cells,utilized CXCR5/CXCL13 and CCR7/CCL19 formigration,homing,maturation,and cell homeostasis as well as secondary lymphoid tissues organogenesis.Meanwhile certain malignant cells took advantages of CXCR5/CXCL13 and CCR7/CCL19 for infiltration,resistance to apoptosis,and inappropriate proliferation.Cellular & Molecular Immunology.2004;1(4):280-294.     

Resolution and noise trade-off analysis for volumetric CT

Until recently, most studies addressing the trade-off between spatial resolution and quantum noise were performed in the context of single-slice CT. In this study, we extend the theoretical framework of previous works to volumetric CT and further extend it by taking into account the actual shapes of the preferred reconstruction kernels. In the experimental study, we also attempt to explore a three-dimensional approach for spatial resolution measurement, as opposed to the conventional two-dimensional approaches that were widely adopted in previously published studies. By scanning a finite-sized sphere phantom, the MTF was measured from the edge profile along the spherical surface. Cases of different resolutions (and noise levels) were generated by adjusting the reconstruction kernel. To reduce bias, the total photon fluxes were matched: 120 kVp, 200 mA, and 1 s per gantry rotation. All data sets were reconstructed using a modified FDK algorithm under the same condition: Scan field-of-view (SFOV) = 10 cm, and slice thickness = 0.625 mm. The theoretical analysis indicated that the variance of noise is proportional to > 4th power of the spatial resolution. Our experimental results supported this conclusion by showing the relationship is 4.6th (helical) or 5th (axial) power.