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find Author "袁勇" 20 results
  • 内源性亚硝胺在食管癌一级预防中的作用及意义

    亚硝胺是一类公认的食管癌化学致癌物。它们广泛存在于人类生存环境中(外源性亚硝胺),也可在一定条件下于人体内合成(内源性亚硝胺)。我国通过控制人群外源性亚硝胺暴露的措施,并未使食管癌发病率明显下降,故内源性亚硝胺诱发人类食管癌的作用可能强于外源性亚硝胺。内源性合成是人体亚硝胺的主要来源,且内源性亚硝胺可致人类食管癌,因而减少人体内源性亚硝胺的暴露可成为食管癌一级预防的重要措施。关于内源性亚硝胺与食管癌预防的可能研究方向总结如下:① 减少亚硝胺底物的摄入及形成、抑制亚硝胺合成反应可减少内源性亚硝胺的暴露;② 亚硝胺在体内的吸收过程可能为被动扩散,干预其吸收过程仍存在困难;③ 亚硝胺本身不致突变,其致突变活性决定于其在体内的代谢或诱导产物,故抑制亚硝胺体内代谢活化也可能抑制食管癌的发生。

    Release date:2016-08-26 02:09 Export PDF Favorites Scan
  • Stem Cell Transplantation for Stroke: A Systematic Review

    Objective To assess systematically the safety and ef fects of stem cell transplantation in stroke patients.Methods CENTRAL (April 2007), MEDLINE (1966 to April 2007), EMBASE (1980 to April 2007), and other databases were searched for RCT of the use of stem cell transplantation for patients with stroke. We critically appraised the quality of included studies according to Juny 2001. We assessed the effects of stem cell therapy on mortal ity, functional outcomes, cognitive functions, image changes, quality of life, and adverse effects by doing meta-analysis with The Cochrane Collaboration’ s Review Manager. Dichotomous outcomes were reported as relative risk and continuous outcome measures as weighted mean differences, with 95% confidence intervals.Results Three RCTs and one historical controlled trial were included involving a total of 69 participants. Only one trial reported the effect on mortality, but because of the small number of death it was not possible to detect any significant differences between stem cell transplantation and routine treatment (RR 0.11, 95%CI 0.01 to 2.31, P = 0.16). Three studies indicated a statistically significant improvement of some functional outcomes in patients treated by stem cell transplantation. Improvements of cognitive function were reported in another trial. One trial showed that the stem cell transplantation significantly improved qual ity of life compared with the control group. Conclusion The current evidence is insufficient to determine whether or not stem cell transplantation is a safe and effective therapy for stroke patients. High-quality, large-scale randomized trials are needed to assess the role of stem cell transplantation for stroke.

    Release date:2016-09-07 02:14 Export PDF Favorites Scan
  • Effects of Lymphatic Chemotherapy on Immune Functions of Patients after Esophageal Carcinoma Resection

    ObjectiveTo explore the effects of intraoperative lymphatic chemotherapy (LC) on immune functions of patients after esophageal carcinoma resection. MethodsPatients who underwent intraoperative LC during esophageal carcinoma resection in the Department of Thoracic Surgery of West China Hospital from March to October,2013 were prospectively included in this study, and patients who underwent esophageal carcinoma resection without intraoperative LC during the same period were also included as the control group. All the patients were divided into a pacitaxel LC group,a fluorouracil LC group,and a control group without LC. A total of 37 patients were included in this study including 25 male and 12 female patients with their age of 42-76 (61.89±7.95) years. There were 15 patients in the pacitaxel LC group,15 patients in the fluorouracil LC group,and 7 patients in the control group. Representative indexes of humoral immunity and cellular immunity in peripheral blood of all the patients were examined preoperatively and on the third and seventh postoperative day, and then compared among the 3 groups. ResultsAll the immune indexes of the 3 groups decreased after surgery to different extent. There was no statistical difference in preoperative and postoperative difference of immunoglobulin concentration between LC groups and the control group (P>0.05). CD8+ T cell count recovered more rapidly after surgery in LC groups than the control group. CD3+ T cells recovered most rapidly after surgery in the fluorouracil LC group. ConclusionLC is beneficial for the recovery of cytotoxic effects of T lymphocytes but may not promote humoral immunity for patients after esophageal carcinoma resection.

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  • 慢性脓胸误诊为巨大肺大泡一例

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  • 食管癌或贲门癌术后乳糜腹的压力治疗

    目的证明腹腔束带加压对于食管癌或贲门癌术后乳糜腹的有效性,并探讨其使用的条件和优缺点。 方法总结四川大学华西医院胸外科2009~2013年行食管癌或贲门癌切除术的3 859例患者中术后出现乳糜腹的4例患者接受加压治疗的情况,对其治疗经过和结局进行分析,其中男3例、女1例,年龄59~68岁。 结果4例患者中,3例加压成功患者均在两周内治愈,随访超过1年时间未见乳糜腹复发,1例患者因腹部加压后乳糜液持续漏入胸腔,导致无法成功加压,治疗失败,最终通过再次手术治愈。 结论在保证腹腔是一个封闭空间及足够压力和时间的前提下,加压治疗对腹部术后乳糜腹有效,且无创、时间短、风险低及不需禁食,其缺点是患者治疗前期有腹腔加压的不适感。

    Release date:2016-10-02 04:56 Export PDF Favorites Scan
  • Comparison of inflammatory reaction for patients with thymomas and myasthenia gravis treated by traditional thoracotomy or minimally invasive surgery

    Objective To investigate the effects of inflammatory reaction of thymomas with myasthenia gravis (MG) treated by traditional thoracotomy and minimally invasive surgery. Methods A total of 40 thymomas patients (Mssaoka Ⅰ or Ⅱ) with myasthenia gravis from August 2014 to June 2015 were treated by traditional thoracotomy (n=20) or video-assisted thoracoscopic surgery (n=20). The serum levels of IL-6, IL-8, TNF-α, CRP and CORT were measured by enzyme-linked immunosorbent assay (ELISA) methods at before anesthesia (T1), after anesthesia (T2), 2 h after skin cut (T3), 24 h post-operation (T4), 48 h post-operation (T5) and 72 h post-operation (T6) respectively. Perioperative parameters were also reported. The statistics analysis was performed by SPSS 17.0 software. Results The serum levels of IL-6, IL-8, TNF-α, CRP and CORT had no significant difference between T1 and T2, T2 and T3 (allP value>0.05) in both groups. But the serum levels of these factors after operation were obviously higher than that of before operation, commonly the highest level was reached at T4 (allP value>0.01), and also was higher at T6 than that of before the operation (allP value<0.01), except the level of TNF-α recovered rapidly to the level of before operation (allP value>0.05) in the VATS group. The operation time, postoperative drainage tube indwelling time and incision healing time in the VATS were lower than that in the control group (allP value<0.05). Conclusion VATS could be widely applied in clinical practice with lowering operative trauma and reducing the degree of inflammatory reaction.

    Release date:2017-04-24 03:30 Export PDF Favorites Scan
  • Clinical characteristics of 57 patients with early stage esophageal cancer or precancerosis treated with esophagectomy following endoscopic submucosal dissection

    Objective To analyze the clinical characteristics of patients treated with esophagectomy following endoscopic submucosal dissection (ESD) for early stage esophageal cancer or precancerosis and the reasons for esophagectomy. Methods We retrospectively analyzed the clinical data of 57 patients who were treated with esophagectomy following ESD in West China Hospital and Shanxian Hygeia Hospital from January 2012 through October 2016. There were 42 males and 15 females at age of 65.4 (52–77) years. There were 15 patients of upper thoracic lesions, the middle thoracic lesions in 34 patients, and the lower thoracic lesions in 8 patients. Results The reasons for esophagectomy included 3 patients with residual tumor, 8 patients with local recurrence, 37 patients with esophageal stricture, and 9 patients with dysphagia, although the diameter was larger than 1.0 cm. The pathology after esophagectomy revealed that tumor was found in 16 patients, including 3 patients with residual tumor and 8 with recurrent tumor confirmed before esophagectomy, and 5 patients with new-found recurrent tumor. Conclusion In the treatment of early stage esophageal cancer or precancerosis, the major reasons for esophagectomy following ESD include esophageal stricture, abnormal esophageal dynamics, local residual or recurrence.

    Release date:2017-09-26 03:48 Export PDF Favorites Scan
  • Public anticipation of clinician graduates in the new era of healthy China: a questionnaire-based cross-sectional study

    ObjectiveThe purpose of this study was to offer new suggestions for current clinician training under the guidance of the Healthy China 2030 policy by investigating the patients’ needs.MethodsThis study surveyed adult outpatients from West China Hospital of Sichuan University between March and July, 2019 and February and May, 2020 by self-constructed questionnaires to investigate the expectation and requirements of outpatients towards medical professionals.ResultsA total of 430 questionnaires were distributed, and 402 of them (93.5%) were collected and included in this study. All questionnaire respondents expected that medical graduates should have outstanding expertise and ethical standard. The majority valued qualities such as physical and mental health (90.05%), a bachelor’s degree or higher (73.88%), knowledge on disease control and prevention (61.69%), knowledge on health care (91.29%), ability to continuously update current knowledge (70.65%), and excellent communication (71.14%) and teamwork (62.44%) skills. In addition, most patients expected that new health care providers to possess humanitarianism and professional dedication relevant traits, and could improve diagnoses and treatments via research activities. Patients’ demand for abilities such as disease control and prevention, health care, and integrative cooperation between traditional Chinese medicine and modern medicine significantly increased after the COVID-19 pandemic (P<0.05).ConclusionsNowadays, to provide health care services which meet the needs of the public, clinicians are expected to have qualities such as outstanding expertise, humanity, research and knowledge-updating skills, disease control and prevention, health care management, and capability to take the advantages of traditional Chinese medicine and modern medicine.

    Release date:2021-03-19 07:04 Export PDF Favorites Scan
  • Effect of Human Growth Hormone on Growth Situation and Hematopoietic Function in Rats under Chemotherapy

    Objective To investigate the effect of recombinant human growth hormone (hGH) on growth situation and bone marrow hematopoietic function in rats under chemotherapy. Methods A total of 136 10-week-old SD rats were included in the study. The rats were randomly assigned into five groups: normal control group (n=8), normal saline control group (NS group, n=32), human growth hormone group (hGH group, n=32), chemotherapeutic drug treated group (CT group, n=32), and chemotherapeutic drug plus hGH treated group (CT+hGH group, n=32). The body weight, bone marrow differential count, and the expression of proliferating cell nuclear antigen (PCNA) in bone marrow were measured before treatment and weekly in four weeks after treatment. Results Weight loss occurred in both CT group and CT+hGH group (P<0.05), but the weight loss in CT+hGH group was significantly smaller (P<0.05) on day 7 after treatment. In myeloid morphology, myeloid cell was hypoplastic excessively in CT group, and it was hypoplastic obviously in CT+hGH group on day 7 after treatment. Day 14, weight gain appeared in CT+hGH group, while weight loss remained in CT group; In myeloid morphology, myeloid cell was hyperplastic actively excessively in CT+hGH group, and myeloid karyote count was increased significantly in CT+hGH group (P<0.05). Day 7, 14 and 21, PCNA positive cells count in CT group was lower than that in hGH group and CT+hGH group (P<0.05). There was no significant different of every index among normal control group, NS group, and hGH group (Pgt;0.05), except weight between normal control group and hGH group on day 7 (P<0.05). Conclusion hGH has a protective effect on myeloid hematopoietic function and growth situation in rats after intraperitoneal chemotherapy.

    Release date:2016-08-28 03:48 Export PDF Favorites Scan
  • Thyroid Hormone Concentrations in Preschool Children in Kashin-Beck Disease Endemic Area

    Objective To determine the thyroid hormone concentrations in preschool children in the Kasin-Beck disease (KBD) endemic area so as to explore the etiology of KBD. Methods Children of 1-6 years old in Naidang village,Jinchuan county, Sichuan Province, China were included. Physical examination was performed, personal history and medical history were collected, and blood samples were drawn for the determination of thyroid hormones. Results Blood samples were successfully collected from 14 children. Of them, 57.14% showed decreased TT3 levels, and 85.71% demonstrated decreased FT3 levels. All children showed significantly lower TT3 and FT3 average levels than the reference average value (P lt;0.000 01). The TT4, FT4and TSH levels were within the normal range. Conclusion Most children in the KBD endemic area showed lower T3 levels, which may act as a key factor for cartilage hypogenesis. It is suggested that a decreased TT3 level be one of the indicators for the assessment of KBD preventative effect, early monitoring and diagnosis of preclinical or subclinical stage of KBD.

    Release date:2016-09-07 02:11 Export PDF Favorites Scan
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