双气囊内镜和胶囊内镜诊断小肠出血的临床评价

目的评价双气囊内镜和胶囊内镜对小肠出血的临床诊断价值。方法比较双气囊内镜、胶囊内镜及全消化道造影对小肠出血病灶的总体检出率;通过自身对照,比较双气囊内镜和胶囊内镜对小肠出血诊断率;分析胶囊内镜对1次双气囊内镜检查明确诊断率的影响。结果105例小肠出血患者中,双气囊内镜检出克罗恩病24例,腺癌15例,慢性非特异性炎症12例,不明原因小肠溃疡10例,小肠间质肿瘤8例,小肠息肉8例,小肠血管畸形出血6例,钩虫病5例,麦克尔憩室及多发憩室5例,小肠淋巴瘤3例,无明显异常9例,阳性率91．4％（96／105）。其中40例进行胶囊内镜检查,病变检出率75．0％（30／40）;75例患者全消化道造影检查,病变检出率33．3％（25／75）。根据胶囊内镜结果1次双气囊内镜检查明确诊断率90．0％（36／40）,而根据临床特征及消化道造影结果1次双气囊内镜检查明确诊断率69．2％（45／65）。结论小肠疾病的主要病因是小肠良性溃疡（包括克罗恩病）、肿瘤、慢性炎症,其次是息肉、血管畸形、寄生虫感染、麦克尔憩室及淋巴瘤等。双气囊内镜对小肠出血诊断率高于胶囊内镜,胶囊内镜能提高1次双气囊内镜明确诊断率。     

双气囊小肠镜与胶囊内镜诊断小肠出血病因比较

目的比较双气囊小肠镜和胶囊内镜在小肠出血中的诊断准确率和实用价值。方法24例原因不明的可疑小肠出血患者分别接受双气囊小肠镜和胶囊内镜检查。双气囊小肠镜首选进镜方式分为经口或经肛2种，首选方式检查后未发现病灶者，日后改换进镜方式再行检查。胶囊内镜采用以色列GIVEN公司产品。2种检查方法分别由专门医师独立操作并诊断，最后进行汇总比较。结果24例患者中21例通过小肠镜检查发现病灶，总检出率为87．5％。24例患者行胶囊内镜检查后，有阳性发现者11例(45．8％)，另13例无异常发现。双气囊小肠镜检查发现的阳性病灶均经活检病理和手术探查证实，其病因诊断准确率为87．5％，胶囊内镜诊断准确率为25％。在耐受性评估方面，胶囊内镜和全麻下经口进镜的耐受性最佳，以后依次为非麻醉经肛方式和非麻醉经口方式。所有小肠镜和胶囊内镜检查者中未见操作相关的严重不良反应。结论①经口和经肛方式结合能使双气囊小肠镜完成对全小肠的检查。②双气囊小肠镜在不明原因小肠出血的病因诊断方面明显优于胶囊内镜检查。③胶囊内镜在小肠多节段病变和长段病变的诊断上仍有一定价值。④胶囊内镜和全麻下经口双气囊小肠镜检查是一项易为患者接受的、安全的检查方法。     

胶囊内镜结合双气囊内镜检查在小肠疾病诊断中的作用

目的 探讨胶囊内镜结合双气囊内镜检查在小肠疾病诊断中的作用.方法 连续调查299例因不明原因消化道出血或腹痛、腹泻等原因而行胶囊内镜检查者,对胶囊内镜阴性或诊断不确定者建议双气囊内镜检查.分析胶囊内镜后双气囊内镜检查者诊断和随访资料.结果 296例完成胶囊内镜检查,发现阳性138例(46.6%),可疑阳性68例(23.0%),阴性90例(30.4%).45例胶囊内镜可疑阳性者和7例阴性者接受双气囊内镜检查,分别检出31例和1例小肠病变.双气囊内镜可能存在假阴性结果8例,未发现假阳性者;胶囊内镜可能存在假阴性结果2例,并有8例假阳性.在胶囊内镜结果提示下,90.3%(28/31)患者经单侧双气囊内镜检查即发现病灶.平均随访期为17个月,93.5%的双气囊内镜明确诊断者得到有效治疗.二种检查方法耐受性好,无严重不良反应发生.结论 胶囊内镜对小肠病变检出率高,但其诊断不确定性也较高.双气囊内镜能明确大部分胶囊内镜可疑阳性者.胶囊内镜结合双气囊内镜检查的诊断策略能提高小肠疾病诊断率、指导治疗并改善患者预后.     

双气囊小肠镜与胶囊内镜在小肠出血应用中的对比研究

目的比较双气囊小肠镜与胶囊内镜在小肠出血中的病变检出率、病因诊断率、耐受性和安全性,初步探讨双气囊小肠镜对小肠出血的内镜下治疗。方法2006年4月至2009年10月烟台毓璜顶医院消化内科收治的可疑小肠出血患者159例,其中81例患者行双气囊小肠镜检查,首选进镜方式分为经口或经肛2种,首选方式检查后未发现病灶者,日后改换进镜方式再行检查。对活动性出血病灶行内镜下止血治疗。另78例患者行胶囊内镜检查。两组患者分别由专门医师独立操作并诊断,最后进行汇总分析,对比双气囊小肠镜与胶囊内镜的临床应用价值。结果双气囊小肠镜组的病变检出率为95.06%,病因诊断率为82.72%,23例检查时见病变活动性出血,行内镜下止血治疗,21例止血成功,内镜止血成功率为91.30%;胶囊内镜组的病变检出率82.05%,病因诊断率为66.67%。双气囊小肠镜组的病因检出率及病因诊断率均显著高于胶囊内镜组,差异有统计学意义(P0.05)。在耐受性方面,胶囊内镜的耐受性最好,双气囊小肠镜的耐受性依次为:全麻下经肛进镜、全麻下经口进镜、非麻醉经肛进镜、非麻醉经口进镜。所有患者均未发生严重并发症。结论双气囊小肠镜对小肠出血的病因诊断明显优于胶囊内镜,并且可行内镜下止血治疗,是一项安全、有效的临床诊疗方法。     

胶囊内镜对不明原因消化道出血的诊断价值

目的 比较胶囊内镜与传统小肠俭查方法对不明原因消化道出血的诊断价值。方法 总结分析67例胃镜、肠镜检查阴性的消化道出血患者中消化道钡餐、肠系膜动脉造影、推进式小肠镜、胶囊内镜及剖腹探查包括手术中肠镜结果。结果 不明原因消化道出血上、中消化道钡餐检查检出率为17．6％，诊断率为13．8％；肠系膜动脉造影检查检出率和诊断率均为13．4％；推进式小肠镜检查检出率、诊断率为．32％；剖腹探查及术中肠镜检出率和诊断率均为83．3％；胶囊内镜检查检出率为80．6％，诊断率为67．7％结论 胶囊内镜检查对于不明原因消化道出血具有较高的检出率和诊断率．明显优于传统的检查方法。     

胶囊内镜与推进式小肠镜诊断不明原因消化道出血的评价

目的 比较胶囊内镜与推进式小肠镜对不明原因消化道出血的诊断价值。方法 总结32例消化道出血患者的胶囊内镜检查结果及36例消化道出血患者推进式小肠镜检查结果，上述患者均经结肠镜、胃镜、X线钡餐、小肠钡剂灌肠、血管造影或核素扫描等检查未发现异常。结果 胶囊内镜检查的32例中共发现异常26例，检出率为8l％。其中能明确解释出血原因者2l例，包括消化道血管病变8例，小肠炎症性肠病5例，小肠息肉4例，小肠恶性间质肿瘤2例，小肠类癌l例(该患者同时伴升结肠脂肪瘤)及出血性胃炎l例；疑诊5例。推进式小肠镜检查的36例明确出血原因9例，即诊断率为25％，包括空肠上段血管畸形2例，平滑肌肉瘤2例，平滑肌瘤、腺瘤性息肉、克罗恩病、壶腹部腺癌及淋巴瘤各l例；疑诊2例。结论 胶囊内镜对不明原因消化道出血具有较高的检出率和诊断率，检查效果及方法明显优于推进式小肠镜。胶囊内镜可明显简化不明原因消化道出血患者的检查步骤．应成为经胃镜、结肠镜检查阴性患者的首选检查方法。     

影响胶囊内镜诊断不明原因消化道出血因素的分析

目的为提高胶囊内镜诊断不明原因消化道出血的诊断率,探讨影响胶囊内镜诊断不明原因消化道诊断率的因素。方法胶囊内镜检查172例,其中不明原因的消化道出血的患者61例,分为2组,A组为胶囊内镜检查明确出血病变者,B组为无明确出血病变者,根据年龄、性别、病史、病变程度、病变表现、排空时间、肠道清洁、检出率、诊断率等对比分析。结果消化道出血的检出率为88．52％,包括胃炎、肠炎、血管畸形、肠息肉、食管静脉曲张等。出血的诊断率为67．2％,包括小肠糜烂,克罗恩病、糜烂性胃炎、溃疡病、肿瘤等。两组病人年龄、性别比较无明显差异,A组病史活动性出血者多,病史长,合并症多,小肠转运时间较长,肠道清洁好,病变程度重,病变检出率高。结论注意病人的选择、合理的小肠转运时间、肠道清洁好、了解出血原因和排序、提高病变鉴别、图像解读及临床综合判断和随访等,可以提高胶囊内镜检查的诊断率,使不明原因消化道出血病变得到及时明确的处理。     

胶囊内镜在小肠疾病诊断中的作用

目的：小肠疾病很难诊断，现有的诊断技术又不尽如人意，而胶囊内镜能发现整个小肠内的微小病变。为此，我们对胶囊内镜在小肠疾病诊断中的价值进行评估。方法：自2002年5月至2003年9月，我们对经结肠镜、胃镜、X线钡餐造影、小肠钡灌造影、血管造影或核素扫描等检查未发现异常的79例疑患小肠疾病、尤其是不明原因消化道出血的患，进行胶囊内镜检查，其中不明原因的消化道出血患56例。结果：75例完成最终研究。75例患中经胶囊内镜检查共发现异常63例，检出率为84％；其中能明确解释临床病因50例，诊断率为66．6％，包括消化道血管病变21例、小肠炎症性肠病16例、小肠息肉5例、小肠恶性间质肿瘤2例、小肠类癌1例(该患同时伴升结肠脂肪瘤)、淋巴瘤1例、粘膜下肿瘤3例及憩室1例。所获取的图像质量良好。结论：胶囊内镜对小肠疾病尤其是不明原因消化道出血具有良好的诊断价值。     

双气囊小肠镜与胶囊内镜对不明原因消化道出血诊断价值的研究

目的 比较双气囊小肠镜与胶囊内镜对不明原因消化道出血检出率、诊断率和实用价值.方法 对2006年10月至2007年10月第三军医大学新桥医院收治的不明原因消化道出血73例患者行双气囊小肠镜检查,经口腔或肛门进镜检查未发现病灶者,改换进镜方式再行检查.另66例行胶囊内镜检查.对比两种检查方式的临床效果.结果 双气囊小肠镜组检出率为94.5%,诊断率为80.8%;胶囊内镜组检出率81.8%、诊断率为50.0%.两组患者均能耐受检查.结论 双气囊小肠镜组的检出率及诊断率均显著高于胶囊内镜组.而胶囊内镜检查更为简便易行.     

胶囊内镜诊断不明原因消化道出血107例

目的:探讨胶囊内镜在不明原因消化道出血中的诊断价值及其与双气囊小肠镜在病因诊断中联合应用的意义。方法:采用M2A胶囊内镜对107例不明原因消化道出血患者进行检查,其中男61例,女46例,平均年龄(51.6±18.9)岁。其中36例患者依据胶囊内镜所观察到的结果,选择经口或经肛行双气囊小肠镜检查和(或)手术探查。结果:107例患者中106例(99.1%)完成胶囊内镜检查,75例(70.8%)胶囊内镜通过回盲瓣。107例中病变检出96例(89.7%)、确诊70例(65.4%)。36例中再经双气囊小肠镜检查和(或)手术后证实胶囊内镜诊断者为26例(72.2%)。2例(1.9%)发生胶囊滞留。结论:胶囊内镜对不明原因消化道出血具有较高的诊断价值,可作为病因诊断的首选筛查手段,与双气囊小肠镜联合应用可大大提高疾病的确诊率。     

胰岛素瘤的解剖分布特点分析

目的胰岛素瘤是最常见的胰腺神经内分泌肿瘤，因其临床表现多样，导致诊断困难。影像学诊断尤其是超声内镜(EUS)在胰岛素瘤的诊断中起着重要作用，拥有较高的敏感性和特异性。本研究拟通过明确胰岛素瘤的解剖分布特点，以期有助于提高影像学的诊断准确率和降低漏诊率，尤其是在教育和培训实践中对于EUS的学习者更具有指导价值。 方法回顾性分析解放军总医院第一医学中心病案资料数据库1993年1月至2019年11月经外科手术、病理确诊为胰岛素瘤的患者的临床资料，检索方法采取搜索术后病理诊断为"胰岛素瘤"的病例，通过查阅病例的方法，提取出胰岛素瘤的大小和解剖分布等数据，进一步分析其特点。 结果共检索到确诊为胰岛素瘤的患者116例，其中，男45例、女71例，年龄13～76岁，平均年龄(44.4±14.85)岁。胰岛素瘤单发110例(94.8%)、多发6例(5.2%)。位置分布：头颈部46例(39.7%)，单发45例、多发1例；体尾部68例(58.6%)，单发65例、多发3例；全胰腺多发2例(1.7%)。病变大小特点：最大径0.4～3.4 cm，平均大小(1.53±0.58)cm。≤1 cm 29例、>1 cm而≤1.5 cm41例、>1.5 cm而≤2.0 cm28例，≤3 cm 15例，>3 cm 3例。年龄与肿瘤的大小相关，≤44岁患者肿瘤平均大小为(1.36±0.51)cm、>44岁患者肿瘤平均大小为(1.70±0.60)cm，P<0.05。头颈部的肿瘤大于体尾部的肿瘤，头颈部肿瘤平均大小(1.66±0.63)cm，体尾部(1.42±0.52)cm，P<0.05。 结论胰岛素瘤在胰腺体尾部较头颈部更好发；绝大多数单发，但可以全胰腺多发；多数小于1.5 cm，肿瘤的大小与患者年龄和肿瘤的解剖分布相关。     

Pathogenesis of carcinoma of the papilla of Vater

Most adenomas and carcinomas of the small intestine and extrahepatic bile ducts arise in the region of the papilla of Vater. In familial adenomatous polyposis (FAP) it is the main location for carcinomas after proctocolectomy. In many cases symptoms due to stenosis lead to diagnosis at an early tumor stage. In about 80%, curative intended resection is possible. Operability is the most relevant prognostic factor. Most ampullary carcinomas resp. carcinomas of the papilla of Vater develop from adenomatous or flat dysplastic precursor lesions. They can be sited in the ampulloduodenal part of the papilla of Vater, which is lined by intestinal mucosa. They also can develop in deeper parts of the ampulla, which are lined by pancreaticobiliary duct mucosa. Intestinal-type adenocarcinoma and pancreaticobiliary-type adenocarcinoma represent the main histological types of ampullary carcinoma. Furthermore, there exist unusual types and undifferentiated carcinomas. Many carcinomas of intestinal type express the immunohistochemical marker profile of intestinal mucosa (keratin 7?, keratin 20+, MUC2+). Carcinomas of pancreaticobiliary type usually show the immunohistochemical profile of pancreaticobiliary duct mucosa (keratin 7+, keratin 20?, MUC2?). Even poorly differentiated carcinomas, as well as unusual histological types, may conserve the marker profile of the mucosa they developed from. These findings underline the concept of histogenetically different carcinomas of the papilla of Vater which develop either from intestinal- or from pancreaticobiliary-type mucosa of the papilla of Vater. Molecular alterations in ampullary carcinomas are similar to those of colorectal as well as pancreatic carcinomas, although they appear at different frequencies. In future studies, molecular alterations in ampullary carcinomas should be correlated closely with the different histologic tumor types. Consequently, the histologic classification should reflect the histogenesis of ampullary tumors from the two different types of papillary mucosa.     

Demonstration of the mechanism of action of biguanides

Summary Palmitic acid oxidation in rat diaphragm homogenate is depressed by biguanide concentrations that are still incapable of inhibiting oxidative phosphorylation. Glucose oxidation is not directly effected by the same biguanide concentrations: however, the inhibitory effect of palmitic acid on glucose oxidation is partly removed by biguanides. Inhibition of fatty acid oxidation, which accounts for most of the metabolic effects caused by these drugs, can be regarded as the fundamental mechanism of action of biguanides. There is some evidence suggesting that these drugs might interact with carnitine, thus preventing long-chain fatty acids from being transported across the mitochondrial membrane to the site of oxidation. Traduzione a cura degli AA.     

Lack of correlation of degree of villous atrophy with severity of clinical presentation of coeliac disease

BACKGROUND AND AIM: Both the clinical presentation and the degree of mucosal damage in coeliac disease vary greatly. In view of conflicting information as to whether the mode of presentation correlates with the degree of villous atrophy, we reviewed a large cohort of patients with coeliac disease. PATIENTS AND METHODS: We correlated mode of presentation (classical, diarrhoea predominant or atypical/silent) with histology of duodenal biopsies and examined their trends over time. RESULTS: The cohort consisted of 499 adults, mean age 44.1 years, 68% females. The majority had silent coeliac disease (56%) and total villous atrophy (65%). There was no correlation of mode of presentation with the degree of villous atrophy (p=0.25). Sixty-eight percent of females and 58% of males had a severe villous atrophy (p=0.052). There was a significant trend over time for a greater proportion of patients presenting as atypical/silent coeliac disease and having partial villous atrophy, though the majority still had total villous atrophy. CONCLUSIONS: Among our patients the degree of villous atrophy in duodenal biopsies did not correlate with the mode of presentation, indicating that factors other than the degree of villous atrophy must account for diarrhoea in coeliac disease.     

血吸虫童虫生长发育及其机制的研究进展

血吸虫童虫是宿主免疫系统攻击的重要靶标,包括皮肤型、肺型和肝门型童虫。宿主分子对童虫生长发育具有重要作用。童虫生长发育机制包括免疫调节、信号转导、性别发育及凋亡等。肌动蛋白、组织蛋白酶、烯醇化酶和葡萄糖基转移酶等分子为血吸虫童虫生长发育的重要分子。本文对血吸虫童虫生长发育及其机制的研究进展做一综述。     

氯硝柳胺悬浮剂的毒性评价

目的评价氯硝柳胺悬浮剂的毒性，为现场大规模应用灭螺提供依据。方法按照中华人民共和国国家标准GB 15670-1995《农药登记毒理学试验方法》和鱼类毒性试验方法进行。结果经口、经皮肤的LDso雌、雄性大鼠均>5 000 mg/kg，经呼吸道的LCso雌、雄性大鼠均>5 000mg/m3，该药经口、经皮肤、经呼吸道毒性均属微毒类药物；兔眼用药后，观察期内无不良反应，对眼无刺激性；皮肤用药后对皮肤无刺激性。与氯硝柳胺原药、氯硝柳胺乙醇胺盐原药和氯硝柳胺乙醇胺盐可湿性粉剂相比，氯硝柳胺悬浮剂对鱼急性毒性最低。结论氯硝柳胺悬浮剂属微毒类药物，对鱼的毒性低于其乙醇胺盐可湿性粉剂，适合于现场应用。     

124例耐多药结核分枝杆菌基因突变特征分析

目的对临床分离的耐多药结核分枝杆菌相关基因的突变特征进行分析。方法对124例耐多药结核分枝杆菌以及50株敏感株的耐药相关基因(包括异烟肼inh A、kat G、oxyR-ahp C间隔区以及利福平rpo B)进行序列测定,分析其基因突变情况。结果异烟肼耐药inh A基因突变率为14.5%;kat G基因突变率为70.2%(87/124),主要位于315位;oxyR-ahp C间隔区突变率为15.3%;inh A、kat G两种基因同时突变率75.0%,三种基因同时突变率为89.5%。利福平rpo B基因突变的检出率高达95.2%,突变主要发生在531、526、516位点。结论我省耐多药菌异烟肼耐药相关基因最常见突变为kat G 315、inh A C-T(-15)、axyR-ahp C间隔区(-10)C-T,利福平为rpo B531、526、516。结合MDR-TB耐药相关基因的特征分析,可以建立一种快速、准确、特异的适合于我省的检测结核菌耐多药性的新方法。     

Assessment of quality of life of parents of children with juvenile chronic arthritis

The aim of the study was to assess the quality of life (QOL) and the psychological status of parents of children with juvenile chronic arthritis (JCA). The QOL, anxiety and depression of the parents of 28 children with JCA were evaluated and compared to those of the parents of 28 healthy children. Mothers of JCA children and mothers of healthy children reported similar QOL. The reported anxiety and depression levels were similar for mothers and fathers in both groups. The parents of children with pauciarticular-type JCA reported lower QOL and higher levels of anxiety and depression than the parents of children with other types, namely polyarticular and systemic JCA. These findings may be explained by the fact that the pauciarticular patients had shorter disease duration and were less frequently seen in the outpatient clinic. The QOL of mothers of children with JCA was found to be slightly impaired in the group of children with pauciarticular JCA. Future larger studies are needed to confirm these results, as the number of subjects in the three groups was rather low. Received: 26 September 2001 / Accepted: 8 February 2002     

Numerical Simulation of the Effect of Rate of Change of Glucose on Measurement Error of Continuous Glucose Monitors

Background

A 5-day in-patient study designed to assess the accuracy of the FreeStyle Navigator® Continuous Glucose Monitoring System revealed that the level of accuracy of the continuous sensor measurements was dependent on the rate of glucose change. When the absolute rate of change was less than 1 mg•dl⁻¹•min⁻¹ (75% of the time), the median absolute relative difference (ARD) was 8.5%, with 85% of all points falling within the A zone of the Clarke error grid. When the absolute rate of change was greater than 2 mg•dl⁻¹•min⁻¹ (8% of the time), the median ARD was 17.5%, with 59% of all points falling within the Clarke A zone.

Method

Numerical simulations were performed to investigate effects of the rate of change of glucose on sensor measurement error. This approach enabled physiologically relevant distributions of glucose values to be reordered to explore the effect of different glucose rate-of-change distributions on apparent sensor accuracy.

Results

The physiological lag between blood and interstitial fluid glucose levels is sufficient to account for the observed difference in sensor accuracy between periods of stable glucose and periods of rapidly changing glucose.

Conclusions

The role of physiological lag on the apparent decrease in sensor accuracy at high glucose rates of change has implications for clinical study design, regulatory review of continuous glucose sensors, and development of performance standards for this new technology. This work demonstrates the difficulty in comparing accuracy measures between different clinical studies and highlights the need for studies to include both relevant glucose distributions and relevant glucose rate-of-change distributions.     

Angiographic diagnosis of the degree of serosal invasion of carcinoma of the colon

Angiography using Prostaglandin El^® was performed on 38 patients with carcinoma of the colon in order to diagnose the degree of serosal cancer invasion. The findings at angiography were classified into four groups:1) AG-S3, abnormal change (irregularity and/or encasement) up to marginal vessels; 2) AG-S2, abnormality up to vasa recta; 3) AG-S1, abnormality of penetrating branches of vasa recta within the wall of the colon; and 4) AG-S0, no distinct findings of abovementioned vessels. These angiographic findings were compared with both macroscopic and microscopic serosal cancer invasion. Angiographic diagnosis is in accord with the macroscopic findings in 84.2 percent of cases. Angiographic diagnosis is in accord with the microscopic findings in 32.4 percent of cases. Macroscopic findings confirm the angiographic diagnosis precisely but the conflict with microscopic findings should not be overlooked. This may be the result of inflammatory change, adhesion, and fibrosis around carcinoma of the colon.