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find Author "郭欣" 6 results
  • Study on the Control of Dynamic Artificial Limb Ankle Based on Central Pattern Generator

    In order to obtain the normal gait for the prosthesis-carrier with the change of external environment and gait, we designed a model of dynamic ankle prosthesis and control system and introduced the strategy of centralpatterngenerator (CPG) about the moving trail of dynamic ankle prosthesis. The dynamic parts, which are incorporated in the model of dynamic ankle prosthesis, provide power in order to have anthropic function and character. The tool of Matlab/simulink was used to simulate the strategy. The simulation results showed that the strategy of CPG learning control in this study was effective and could track the reference trail rapidly and fit the moving trail of a person's normal limb. It can make the prosthetic timely regulation and action, enhance the prosthetic intelligence. It has important practical value for intelligent prosthesis development based on this analysis of technology.

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  • 腹腔镜胆囊切除术意外胆囊癌22例报道

    目的探讨腹腔镜胆囊切除术(laparoscopic cholecystectomy,LC)中发现意外胆囊癌(unexpected gallbladder cancer,UGC)的临床诊治流程及其疗效评价。 方法收集解放军第451医院腔镜外科2013年1月至2015年8月期间因胆囊良性疾病行LC术患者的临床资料,共计发现UGC 22例,评价其诊治流程及治疗效果。 结果22例患者手术均获成功,无手术死亡病例。术后无感染、腹腔内出血等严重并发症发生;有2例患者术后出现少量胆汁渗漏,2例患者术后出现腹腔内少量渗血,均经引流2~5 d后好转。术中有6例行冰冻病理学检查确诊,其中重度不典型增生伴局部癌变5例,行单纯胆囊切除术;高分化腺癌1例,中转开腹行胆囊癌根治术。其余16例为术后病理学检查提示胆囊癌,其中13例二次手术行胆囊癌根治术,另3例患者家属放弃二次手术治疗。22例患者中Nevin分期为Ⅰ期17例,Ⅱ期3例,Ⅲ期2例。Ⅰ期、Ⅱ期和Ⅲ期患者术后1年存活者分别为14/17、2/3和0/2例。 结论胆囊癌早期诊断困难,术前应对存在危险因素的胆囊良性病变患者提高警惕,早期行手术治疗可提高其临床疗效。

    Release date:2016-10-25 06:10 Export PDF Favorites Scan
  • 上腹部手术史患者行三孔腹腔镜胆囊切除术的临床研究

    目的 总结对有上腹部手术史患者行三孔腹腔镜胆囊切除(LC)术的安全性及经验。 方法 对解放军第 451 医院 2011 年 6 月至 2015 年 6 月期间收治的有上腹部手术史且行三孔 LC 术的 98 例患者的临床病理资料进行回顾性分析。 结果 98 例患者均成功建立气腹,其中 96 例成功完成三孔 LC 术,成功率为 97.96%;1 例患者因严重肥胖、腹腔内视野显露不足,于右侧腋前线处建立第 4 个 Trocar 后完成手术;1 例患者因肝血管瘤切除术后胆囊三角区粘连严重而中转开腹手术。手术时间 29~136 min,平均 53 min,中位时间 49 min。有 29 例患者术后放置引流管并于术后 48 h 拔除。术后无一例患者死亡、腹腔出血、胆汁漏等并发症发生,患者均于术后 4 d 痊愈出院。术后病理结果证实慢性胆囊炎 51 例,慢性胆囊炎急性发作 38 例,胆囊息肉 9 例,无胆囊癌患者。 结论 有上腹部手术史患者行三孔 LC 术是安全、有效的,术前应利用 B 超评估粘连并选择穿刺部位,术中直视下建立气腹,术中具体的解剖需要术者娴熟的操作技能。

    Release date:2017-05-04 02:26 Export PDF Favorites Scan
  • 腹腔镜与开腹手术治疗 Mirizzi 综合征的临床疗效比较

    目的 比较腹腔镜和开腹手术治疗 Mirizzi 综合征的临床疗效。 方法 回顾性收集解放军第 451 医院全军腹腔镜中心于 2010 年 1 月至 2014 年 12 月期间收治的 69 例 Mirizzi 综合征患者的临床资料,根据接受的手术类型分为腹腔镜组(n=36)和开腹组(n=33),比较腹腔镜组和开腹组患者的手术疗效。 结果 腹腔镜组患者的手术时间〔(56.2±19.4)min比(86.2±22.1)min〕、术中出血量〔(47.5±25.4)mL比(104.9±41.6)mL〕、术后进食时间〔(12.4±5.6)h比(29.2±10.4)h〕、术后排气时间〔(11.4±5.7)h比(25.4±6.6)h〕和住院时间〔(5.4±2.4)d比(8.9±3.1)d〕均短于开腹组,差异均有统计学意义(P<0.05)。术后腹腔镜组发生胆瘘 2 例,并发症发生率为 5.56%;开腹组发生胆瘘 1 例,肺部感染 1 例,并发症发生率为 6.06%,2 组患者的近期并发症发生率比较差异无统计学意义(P>0.05)。术后所有患者均获访,随访时间为 10~35 个月,中位数为 19 个月。随访期间,腹腔镜组和开腹组各有 1 例患者新发胆瘘,远期并发症发生率分别为 2.78% 和 3.03%,2 组患者的远期并发症发生率比较差异也无统计学意义(P>0.05)。所有患者随访期间均无胆管狭窄和结石残留发生。 结论 腹腔镜治疗Ⅰ型和Ⅱ型 Mirizzi 综合征安全有效,可减轻对患者的创伤并加快恢复,对于术前明确诊断的患者可首选腹腔镜治疗。

    Release date:2017-07-12 02:01 Export PDF Favorites Scan
  • 三种自身抗体和补体C3水平检测对狼疮性肾炎患者的诊断意义

    目的探讨抗心磷脂抗体(ACA)、抗核小体抗体、抗核糖体p蛋白抗体3种自身抗体与补体C3水平检测对狼疮性肾炎(LN)患者的诊断意义。 方法2005年7月-2010年12月对406例系统性红斑狼疮(SLE)患者(其中LN 122例)和120例健康体检者采用酶联免疫吸附测定法测定ACA,应用欧蒙印迹法测定抗核小体抗体和抗核糖体p蛋白抗体,应用散射比浊法测定补体C3水平。 结果ACA和抗核糖体p蛋白抗体阳性率在LN组均为21.31%,在非LN组分别为17.61%、14.08%,差异无统计学意义(P>0.05);抗核小体抗体在LN组为56.56%,在非LN组为39.08%,差异有统计学意义(P<0.05);LN组和非LN组3种抗体阳性率与对照组比较差异有统计学意义(P<0.01);LN组、非LN组和对照组补体C3水平分别为(0.52±0.22)、(0.67±0.29)、(1.28±0.32)g/L,3组比较差异均有统计学意义(P<0.01);LN组ACA、抗核小体抗体和抗核糖体p蛋白抗体同时阳性率(10.66%)高于非LN组(3.17%),差异有统计学意义(P<0.05)。 结论ACA、抗核小体抗体、抗核糖体p蛋白抗体及补体C3的联合检测对狼疮性肾炎的诊断及鉴别诊断、预后判断等方面具有一定意义。

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  • Efficacy of acellular dermal matrix and subepithelial connective tissue flap on gingival recession: a systematic review

    ObjectiveTo systematically review the efficacy of acellular dermal matrix (ADM) and subepithelial connective tissue flap (sCTG) on patients with gingival recession (GR).MethodsPubMed, EMbase, The Cochrane Library, CNKI, WanFang Data and VIP databases were electronically searched to collect randomized controlled trials (RCTs) about the efficacy of ADM and sCTG on patients with GR from inception to August 11st, 2019. Two reviewers indepeudently screened literature, extracted data and assessed the risk of bias of included studies, and then meta-analysis was performed by using RevMan 5.3 software and Stata 12.1 software.ResultsA total of 9 RCTs were included. The results of meta-analysis showed that: there were no significant differences in probing depth (PD) (MD3m=−0.04, 95%CI −0.18 to 0.11, P=0.63; MD6m=−0.01, 95%CI −0.13 to 0.12, P=0.90) and GR degree (MD3m=−0.10, 95%CI −0.37 to 0.18, P=0.48; MD6m=−0.02, 95%CI −0.33 to 0.29, P=0.89) in 3 and 6 months after operative between two groups. But the clinical attachment loss (CAL) in 3 months after operation (MD=0.33, 95%CI 0.00 to 0.66, P=0.05) and width of keratinized tissue (KTW) in 6 months after operation (MD=−0.48, 95%CI −0.76 to −0.20, P=0.000 7) of sCTG group were superior to ADM group, the differences were statistically significant.ConclusionCurrent evidence shows that there are no differences in PD and GR degree in 3 months and 6 months after operation between ADM and sCTG group. But the CAL in 3 months after operation and KTW in 6 months after operation of sCTG group is superior to ADM group. Due to limited quality and quantity of the included studies, more high-quality studies are needed to verify above conclusion.

    Release date:2020-03-13 01:50 Export PDF Favorites Scan
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