Effects of cochlear implant surgical technique on post-operative electrode impedance

Conclusions: The mCI surgical technique led to reduced impedance and minimized disturbance of the microenvironment inside the cochlea. Atraumatic surgical techniques and inflammation-reduction strategies may preserve the cochlear architecture and prevent fibrotic development. Objectives: To assess the advantages of a modified minimal access technique in cochlear implantation as well as to investigate the effects of intra-operative application of inflammation reduction strategies on the intra-cochlear impedance. Methods: One hundred patients received a 31.5?mm long Med-El standard electrode array fully inserted into the cochlea and did not have surgical complications post-operation. Patients were divided into two groups according to the surgical technique that was used for implantation: 50 were in the modified minimal access cochlear implant (mCI) surgery group and 50 were in the traditional CI surgery group. Intra-cochlear impedance values were measured at initial activation (4 weeks post-operatively). Electrode impedance values were compared between the surgery groups. Results: Electrode impedance values were significantly lower in the mCI group than in the CI surgery group at initial activation (5.01 kOhm vs 6.10 kOhm, respectively, F?=?13.761, p?=?0.000). The differences between the two groups were most prominent for the electrodes located at the basal region of the cochlea.     

诱导前给予地佐辛对口腔癌患者术后镇痛效果的影响

目的探讨诱导前给予地佐辛对口腔癌根治术患者术后镇痛效果的影响。方法选择全麻下择期行口腔癌根治术患者60例,男36例,女24例,年龄35~65岁,ASAⅠ或Ⅱ级,随机分为两组,每组30例。于麻醉诱导前15min经静脉分别给予地佐辛0.15mg/kg(D组)或等量生理盐水5ml(C组)。术后均给予舒芬太尼静脉自控镇痛。检测注射地佐辛(或生理盐水)前(T_0)、术后2h(T_1)和12h(T_2)时血浆皮质醇(Cor)、促肾上腺皮质激素(ACT_H)和血清C反应蛋白(CRP)浓度。记录T_1、T_2和术后24h(T_3)时的VAS疼痛评分、BCS舒适度评级、Ramsay镇静评分。记录术后恶心、呕吐、低血压与皮肤瘙痒等不良反应情况。结果与T_0时比较,T_1、T_2时两组血浆Cor、ACT_H浓度及血清CRP浓度明显升高(P0.05)。T_1、T_2时D组血浆Cor、ACTH浓度及血清CRP浓度明显低于C组(P0.05)。T_1~T_3时D组VAS评分明显低于,Ramsay镇静评分明显高于C组,T_1、T_2时BCS舒适度评级明显高于C组(P0.05)。两组术后恶心、呕吐、低血压与皮肤瘙痒等不良反应发生率差异无统计学意义。结论诱导前给予地佐辛能有效减轻口腔癌根治术患者术后的应激反应,提高患者的舒适度,增强舒芬太尼术后镇痛的效果。     

骨质疏松门诊健康教育模式的探讨

目的探讨骨质疏松门诊健康教育模式对骨质疏松患者知识认知和骨密度的影响,并评价其实施效果。方法应用骨质疏松健康教育模式,包括建立骨质疏松门诊、成立骨质疏松教育小组、建立骨质疏松健康管理数据库、随访患者等。教育的内容包括骨质疏松一般知识、预防知识、饮食治疗、运动治疗、药物知识、骨折等并发症防治知识、自我监测与管理、骨质疏松症的诊断等。教育方式应用理论授课和操作演示及患者现身说法;教育形式采用一对一教育、小组教育、健康教育俱乐部。12个月后对300例骨质疏松症患者进行骨质疏松知识掌握程度及骨密度等方面的评价,比较实施健康教育前后的差异性。结果患者在疾病知晓、疾病预防、饮食治疗、运动治疗、药物治疗、预防骨折等知识、自我监测与管理、骨质疏松症的诊断等方面实施健康教育前后差异均有统计学意义(P0.05);女性60~69岁L1、男性60~69岁及70~79岁Neck和L1骨密度实施健康教育前后差异有统计学意义(P0.05)。结论门诊骨质疏松健康教育模式可有效提高骨质疏松症患者骨质疏松知识和腰椎及髋部骨密度。     

基于多靶点PK-PD模型评价丹酚酸A对缺血性心衰的保护作用

基于代谢平衡模型,建立多靶点药代动力学-药效学(PK-PD)结合模型,从整体角度评价丹酚酸A(Sal A)对缺血性心衰的保护作用。大鼠随机分为3组,分别为假手术组、缺血性心衰组和Sal A给药组,结扎后立即给药,连续给药4周,分别于给药前和给药后1、2、3、4周采集血样,测定血浆中脑钠肽(BNP)、血管紧张素Ⅱ(AngⅡ)、丙二醛(MDA)、不对称二甲基精氨酸(ADMA)含量以及谷胱甘肽过氧化物酶(GSH-Px)酶活力,基于上述标志物建立代谢平衡模型,选用代谢失衡动力学参数k从整体角度量化机体状态,并以参数k的变化率作为替代药效指标建立多靶点PK-PD模型,用以考察Sal A对缺血性心衰的保护作用。结果显示,Sal A对各标志物均有一定的改善作用,参数k与表征心功能的指标左心室射血分数相关性良好,模型可以很好地拟合Sal A的血浆药物浓度-曲线下面积(AUC)和药物对参数k的改善程度I之间的关系。基于代谢平衡模型建立的多靶点PK-PD模型能够很好地评估Sal A对缺血性心衰的保护作用,为多靶点中药PK-PD模型的建立提供了新的思路。     

Alb-cre/DTR小鼠可诱导性肝损伤模型的建立

[摘要] 目的 建立Alb-cre/DTR双转基因小鼠模型并进行相关表型分析,在此基础上建立可诱导性肝损模型,可用于肝脏疾病的相关研究。方法 将引进的Alb-cre和DTR小鼠扩繁后,通过杂交的方式获得双转基因小鼠。提取小鼠尾部组织DNA,利用PCR方法进行基因型鉴定。在双转基因小鼠上腹腔注射白喉毒素,之后在不同时间点进行称重、采血,检测血清ALT、AST水平。 结果 将Alb-cre和DTR小鼠杂交、筛选后获得了Alb-cre/DTR双转基因小鼠,对该小鼠使用0.625ng/g剂量的白喉毒素,可使小鼠血清中ALT与AST水平显著升高,解剖小鼠后观察到肝脏整体变白,HE染色结果显示肝细胞明显坏死。 结论 Alb-cre和DTR小鼠杂交是繁育Alb-cre/DTR小鼠的较好方法,且PCR方法能够鉴定该小鼠,并能建立特异性肝损小鼠模型。     

Influence of far upstream element binding protein 1 gene on chemotherapy sensitivity in human U251 glioblastoma cells

Introduction

The aim of this study was to determine the influence of the far upstream element binding protein 1 gene (FUBP1) on chemotherapy sensitivity in human U251 glioblastoma cells.

Material and methods

Real-time polymerase chain reaction (PCR) was used to determine the expression of the FUBP1 gene in 43 cases of human brain gliomas. Western blot analysis was used to determine the inhibitory effect of RNA interference on FUBP1 gene expression. Methyl thiazolyl tetrazolium assay (MTT) and flow cytometry methods were used to determine the growth inhibitory rate and apoptosis rate of the U251 cells with FUBP1 silencing. The growth inhibitory rate and apoptosis rate were further determined after treatment of those U251 cells with cisplatin (DDP).

Results

The expression of FUBP1 mRNA was up-regulated significantly in gliomas, 177.65% as much as in peri-cancerous tissues (p < 0.05). The expression of FUBP1 protein was inhibited significantly with siRNA-FUBP1 (p < 0.05). In FUBP1-silenced cells, the growth inhibitory rate increased from 1.4% to 29.5%, and the apoptosis rate increased from 2.68% to 5.84% (p < 0.05 for both). After treating with DDP at various concentrations (1, 3, 5 µg/ml), the growth inhibitory rate of FUBP1-silenced cells increased from 14.42%, 17.46% and 23.55% to 21.69%, 27.51% and 37.57%; the apoptosis rate increased from 8.85%, 14.37% and 18.21% to 13.25%, 18.46% and 26.52%.

Conclusions

The up-regulation of FUBP1 relates to the carcinogenesis of gliomas. FUBP1 silencing increases the growth inhibitory rate and apoptosis rate of the U251 cells, and enhances the chemotherapy sensitivity of U251 cells to DDP.     

Splenorenal shunt via magnetic compression technique: a feasibility study in canine and cadaver

Introduction: The concept of magnetic compression technique (MCT) has been accepted by surgeons to solve a variety of surgical problems. In this study, we attempted to explore the feasibility of a splenorenal shunt using MCT in canine and cadaver.

Material and methods: The diameters of the splenic vein (SV), the left renal vein (LRV), and the vertical interval between them, were measured in computer tomography (CT) images obtained from 30 patients with portal hypertension and in 20 adult cadavers. The magnetic devices used for the splenorenal shunt were then manufactured based on the anatomic parameters measured above. The observation of the anatomical structure showed there were no special structural tissues or any important organs between SV and LRV. Then the magnetic compression splenorenal shunt procedure was performed in three dogs and five cadavers. Seven days later, the necrotic tissue between the two magnets was shed and the magnets were removed with the anchor wire.

Results: The feasibility of splenorenal shunt via MCT was successfully shown in both canine and cadaver, thus providing a theoretical support for future clinical application.     

EphA5 protein,a potential marker for distinguishing histological grade and prognosis in ovarian serous carcinoma

Background

Ovarian serous carcinoma (OSC) is the most common ovarian epithelial malignancy. Disregulation of Eph/ephrin signaling has been implicated in oncogenesis and tumor progression. EphA5 receptor is one of large families of Eph tyrosine kinase receptor and is documented in the development of nervous system. Till now, there is no published data about the role of EphA5 in ovarian epithelial neoplasmas.

Methods

This study aims to investigate the expression of EphA5 protein in ovarian serous carcinoma, and its relationship to clinical pathological characteristics. Sixty-one cases of ovarian serous carcinoma, 24 cases of benign ovarian serous tumors, 42 cases of serous borderline tumors and 20 cases of normal fallopian tubes were examined using immunohistochemical staining. The relationship between EphA5 expression and pathological parameters was analyzed. Kaplan-Meier survival function was used to analyze prognosis of patients.

Results

Immunostaining analysis demonstrated that the EphA5 protein was highly expressed in 100% (20/20) of normal fallopian tube samples, 100% (24/24) of benign epithelial ovarian tumors, 76% (32/42) of ovarian serous borderline tumors, and 31% (19/61) of ovarian serous carcinomas. Loss of EphA5expression was associated with tumor grade (P?<?0.001) and FIGO stage (P?=?0.005). The survival analysis showed that patients with negative or weak expression of EphA5 protein had a poor outcome than those with positive expression (P?=?0.004).

Conclusions

Our results show that EphA5 may be a potential biomarker for distinguishing high-and low-grade ovarian serous carcinoma and a potential prognostic marker.

     

Clinical analysis of thoracoscopic surgery combined with intraoperativeautologous blood transfusion in the treatment of traumatic hemothorax

From January 2013 to January 2015, 19 patients of traumatic hemothorax with hemorrhagic shock were treated in our department by thoracoscopic surgery combined with autologous blood transfusion. This study retrospectively analyzed the therapeutic effect and shared our experience. The average amount of blood transfused back was 662.41 ml ± 269.15 ml. None of the patients developed transfusion reaction and were all discharged uneventfully. Thoracoscopic surgery combined with autologous blood transfusion is effective in the rescue of patients with progressive hemothorax and hemorrhagic shock. When corresponding indications are well managed, treatment for these patients is quicker, safer, and more effective.