摘要:目的:探索可靠的卒中患者床旁吞咽评估方法。方法：61例住院卒中患者均进行各种床旁吞咽评估筛查及电视透视检查，以后者为金标准探讨各方法的敏感度、特异度及阳性、阴性预测值。结果:六种独立床旁吞咽评估方法与金标准相比较的敏感度在60%～87%之间，特异度在76%～89%之间，阳性预测值在50%～69%之间，阴性预测值在86%～95%之间；几种评估方法作为平行试验联合应用时的敏感度在89%～98%之间，阴性预测值在94%～99%之间；几种方法作为序列试验应用时的特异度在97%～99%之间，阳性预测值在82%～90%之间。结论：根据不同方法的预测特点，可得到针对不同患者的、有效的床旁评估方法。床旁吞咽评估简单、有效、便捷，是临床工作中适宜的评估方法。
目的：探讨单纯脑白质疏松症(LA)以及LA合并脑梗死及其MRI影像学严重程度与年龄、性别、高血压、糖尿病相关性初步分析。方法：根据郭氏等2003年制定的LA诊断标准纳入168例脑白质疏松症患者，分为A、B两组：A组95例为单纯脑白质疏松(LA)，B组73例为LA合并脑梗死(LA+CI)。两组患者均行头MRI检查。根据Kinkel等的方法将T2WI显示脑室周围高信号范围及程度分为5型.结果：年龄与脑白质疏松的严重程度呈线性相关性(Plt;0.05)，男性与女性间比较脑白质疏松的发生率无显著差异(Pgt;0.05)，LA以及LA+CI患者，其高血压及糖尿病伴发率较高，而且LA+CI组高于LA组(高血压Plt;0.01，糖尿病Plt;0.01)，LA患者MRI表现以1型为主，LA+CI患者表现以2型为主，Plt;0.01)。结论：脑白质疏松症的严重程度与年龄密切相关，LA的发生率在男女性别间无明显差异。高血压、糖尿病可能是LA的危险因素。LA+CI组与单纯LA组相比，其高血压、糖尿病伴发率更高且MRI表现程度更重。
【摘要】 目的 分析合并免疫指标异常的视神经脊髓炎临床特点。 方法 回顾性分析2009年5月-2010年11月收治的62例视神经脊髓炎患者中24例合并免疫指标异常患者的临床资料。24例均为女性，发病年龄14~53岁。对其临床表现、视觉诱发电位、影像学检查结果、免疫检查结果进行分析。 结果 所有患者均有脊髓和视神经同时或先后受累的表现。24例视觉诱发电位检查23例异常。脊髓MRI显示病变集中于颈段、上胸段脊髓。颈段和胸段脊髓同时受累17例，单纯颈段脊髓受损6例，单纯胸段脊髓受损1例。所有患者抗核抗体滴度均≥1∶100，合并抗SSA抗体阳性14例（55.5％），同时合并抗SSB抗体阳性11例（45.8％），合并抗Rib抗体阳性1例，合并抗SCL-70抗体阳性1例，合并抗dsDNA抗体1例。 结论 视神经脊髓炎合并免疫指标异常的患者以女性较为多见，易复发，青壮年患者发病率最高。脊髓MRI示病变集中于颈段、上胸段脊髓，表现为长节段脊髓损害。视神经脊髓炎患者合并结缔组织病的病例较多。【Abstract】 Objective To analyze the clinical features of neuromyelitis optica (NMO) combined with abnormal immune parameters. Methods We retrospectively reviewed the clinical data of 24 patients with NMO and abnormal immune parameters among the 62 NMO patients who were admitted into our department between May 2009 and November 2010. All patients were female, aged from 14 to 53 years. We analyzed their clinical manifestations, visual evoked potentials, imaging results, and immunological examinations. Results All patients had simultaneous or successive spinal cord and optic nerve involvement. Twenty-three patients had abnormal visual evoked potential. MRI showed that the lesions focused on the cervical and upper thoracic spinal cord. Both cervical and thoracic spinal cord were involved in 17 cases; there were 6 cases of simple cervical spinal cord injury and 1 case of simple thoracic spinal cord damage. Antinuclear antibody titer of all the patients was ≥1∶100. Combined positive anti-SSA antibody occurred in 14 patients (55.5%); Concomitant positive anti-SSB antibodies occurred in 11 patients (45.8%); Combined positive anti-Rib antibodies occurred in 1 patient; Combined positive anti-SCL-70 antibody occurred in 1 patient; and combined positive anti-dsDNA antibodies occurred in 1 patient. Conclusions NMO combined with abnormal immune parameters mainly occurs in female patients, especially in young people. Recurrence rate is high. MRI shows that the lesions focus mainly on the cervical and upper thoracic spinal cord, manifesting the characteristic of long segment damage. And NMO is frequently combined with connective tissue disease.
Objective To investigate the effect of monocyte chemoattractant protein 1 (MCP-1) on the migration of the induced and differentiated mouse bone marrow mesenchymal stem cells (BMSCs) for raising the efficacy of intravenous transplantation of BMSCs. Methods The BMSCs were cultured with the method of differential adhesion and density gradient centrifugation of C57/BL10 mice, and were identified by alkal ine phosphatase Gomori modified staining after osteogenic inducing. At the 3rd passage, the BMSCs were induced to the myoblasts with 5-azacytidine (5-Aza). The chemotaxis of MCP-1 in the induced and differentiated BMSCs in vitro at concentrations of 25, 50, 100, 200, and 400 ng/mL was observed through the migration test, by counting the number of the migrated cells. The expression of the chemokine receptor 2 (CKR-2) in the induced and differentiated BMSCs was detected with the flow cytometry. Results The cells could be cultured with the methods of differential adhesion and density gradient centrifugation and still had higher prol iferative and differentiative potency; the induced cells at the 3rd passage could differenciate to the osteoblasts, confirming that the cells were BMSCs; the myogenic induced BMSCs possesed the sarcotubule structure. The number of the migrating BMSCs at MCP-1 concentrations of 25-400 ng/ mL were respectively 35.066 7 ± 6.584 2, 43.200 0 ± 6.460 8, 44.466 7 ± 4.823 5, 45.600 0 ± 8.650 3, and 50.733 3 ± 7.582 5; showing significant difference when compared with control group (28.333 3 ± 8.917 6, P lt; 0.05), and presenting significant difference among 25, 50, 400 ng/mL groups compared with each other (P lt; 0.05). The expression of CKR-2 in the mouse BMSCs (48.0%) was significantly higher (P lt; 0.001) than those of blank control (0.6%) and negative control (17.0%). Conclusion The results indicate that the MCP-1 can induce the migration of mouse BMSCs by MCP-1/CKR-2 pathway.
Pathological images of gastric cancer serve as the gold standard for diagnosing this malignancy. However, the recurrence prediction task often encounters challenges such as insignificant morphological features of the lesions, insufficient fusion of multi-resolution features, and inability to leverage contextual information effectively. To address these issues, a three-stage recurrence prediction method based on pathological images of gastric cancer is proposed. In the first stage, the self-supervised learning framework SimCLR was adopted to train low-resolution patch images, aiming to diminish the interdependence among diverse tissue images and yield decoupled enhanced features. In the second stage, the obtained low-resolution enhanced features were fused with the corresponding high-resolution unenhanced features to achieve feature complementation across multiple resolutions. In the third stage, to address the position encoding difficulty caused by the large difference in the number of patch images, we performed position encoding based on multi-scale local neighborhoods and employed self-attention mechanism to obtain features with contextual information. The resulting contextual features were further combined with the local features extracted by the convolutional neural network. The evaluation results on clinically collected data showed that, compared with the best performance of traditional methods, the proposed network provided the best accuracy and area under curve (AUC), which were improved by 7.63% and 4.51%, respectively. These results have effectively validated the usefulness of this method in predicting gastric cancer recurrence.
Objective We aimed to evaluate the current status of the construction and practice of the stroke center in West China Hospital of Sichuan University and develope a future strategy to promote the standardized developement of inpatients care and evidence practice. Methods The current status of the Stroke Center in West China Hospital of Sichuan University was assessed. The procedure of diagnosis and treatment was inspected in detail, including triage, thrombolytic therapy, antithrombotic medication and anticoagulant, primary and secondary prevention, filter of risk factors, rehabilitation and education for patients. After that, new plans were made on the basis of the assessment and experiences acquired from practices in the Stroke Center in West China Hospital. Results The primary Stroke Center had been constructed in West China Hospital. The practice in West China Hospital showed that the Stroke Center significantly reduced the mortality and shortened the length of hospital stay of the patients with stroke. Conclusion It is proved that construction and implementation of the Stroke Center in West China Hospital are feasible.
ObjectiveTo explore the clinical features of myasthenia gravis (MG) harboring both acetylcholine receptor antibody (AChRAb) and muscle-specific tyrosine kinase antibody (MuSKAb) positivity.MethodsWe searched PubMed, Web of Science, Embase and China National Knowledge Infrastructure databases (from inception to November 2016), to collect the case reports of MG with both AChRAb and MuSKAb positivity. Along with one case discovered in Department of Neurology, West China Hospital, the clinical data of the cases were retrospectively analyzed.ResultsA total of 13 double-seropositive MG patients were enrolled in this study, demonstrating a marked female predominance (including 1 male and 12 females) and a younger age at onset [(31.07±24.77) years]. During the disease course, 10 of the included patients presented severe bulbar involvement, dyspnea and neck weakness, with myasthenic crisis in 6 individuals. Among the 11 patients with detailed records, abnormal thymus glands comprised 4 thymus hyperplasia and one thymoma. While the response to oral pyridostigmine was unsatisfactory in 11 double-seropositive MG patients, ranging from mild benefit to overt intolerance; the patients treated with plasma exchange (3/3), rituximab (1/1) or corticosteroid (7/12) improved dramatically, with other immumosuppressants and intravenous immunoglobulin partially responsive. Moreover, 5 patients undergoing thymectomy improved markedly or partially.ConclusionsCompared with MG patients with MuSKAb positivity merely, the condition of the double-seropositive MG patients seem to be more severe and further inclined to myasthenic crisis. The incidence of abnormal thymus, such as thymus hyperplasia, is higher. Thymectomy may be an effective treatment for such patients.