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find Keyword "堵塞" 13 results
  • YAG Laser Surgery of Lacrimal Passage on Animal

    目的:本文观察了三只做了泪道激光手术的狗泪小管组织,目的是为了解激光术后是否泪道会遗留瘢痕或狭窄。方法:三只成年狗用激光分别点击了泪小点,泪小管,泪囊。30天内取材。结果:泪道上皮及管道未见损害。结论:泪道YAG激光只要掌握能量和点击次数,术后不会遗留瘢痕。

    Release date:2016-09-08 10:14 Export PDF Favorites Scan
  • YAG Laser Surgery of Lacrimal Passage

    目的:为了进一步了解YAG激光在临床对泪道病的治疗情况,预后的观察随访的结果,我们对所做的患者进行分析、总结。材料和方法:我院4月中做了96例泪道激光成形术,本文从临床,随访等方面,通过写信,电话,回诊等进行随访、总结。结果:86例中单一部位的堵塞占67%,术后随访58%通畅。结论:泪道YAG激光对泪小管、泪总管堵塞治疗有一定疗效,能解决部分病人的流泪问题。

    Release date:2016-09-08 10:14 Export PDF Favorites Scan
  • 冠状窦堵塞对心脏停搏液灌注压力的影响

    目的 探讨主动脉根部顺行灌注加冠状窦堵塞心肌保护时心脏停搏液灌注速度、主动脉根部压、冠状窦压间的相互关系.方法 采用改良的Langendorff离体兔心灌注模型,将18只兔按冠状窦堵塞程度不同分为不堵塞组,半堵塞组和次全堵塞组,每组6只兔,在行主动脉根部灌注心脏停搏液之前堵塞冠状窦.温血心脏停搏液以2ml/kg.min,4ml/kg.min,6ml/kg.min和8ml/kg.min 4种速度灌注,观察三组的灌注速度与主动脉根部压和冠状窦压的关系.结果 三组心脏停搏液的灌注速度与主动脉根部压和冠状窦压之间有显著的相关性(P<0.05或P<0.01),冠状窦堵塞可明显提高主动脉根部压.结论 冠状窦次全堵塞、温血停搏液灌注速度4~6ml/kg.min有利于心肌保护.

    Release date:2016-08-30 06:35 Export PDF Favorites Scan
  • Heparin Added in Total Nutrient Admixture for Preventing Peripherally Inserted Central Catheter Occlusion in Neonate: A Case Report

    Objective To make an individualized administration scheme via evidence-based medicine methods, namely adding heparin into the total nutrient admixture (TNA) solution, so as to help a neonate to prevent the occlusion of peripherally inserted central catheter (PICC). Methods After carefully assessing the condition of neonate, this clinical issue was put forward in accordance with the PICO principles. Randomized controlled trials (RCTs) and systematic reviews on neonates’ PICC occlusion were collected from The Cochrane Library, CCTR, DARE, NGC, MEDLINE (Ovid) and CBM from inception to 2011. The clinical intervention scheme was finally made after the assessment of the retrieved evidence and neonate’s physiological condition. Results A total of 4 RCTs and 1 systematic review related to the issues were identified. The following scheme was finally made for the neonate through the assessment of the retrieved evidence and combination of intentions of the patient’s family members: heparin (0.5 U/mL) was added into TNA to prevent PICC occlusion. During the application, blood routine test and blood coagulation were monitored, and the catheter opening time and extubation reason were recorded. Through the above treatment, the neonate successfully completed the treatment before extubation. The time of both PICC detaining and opening was 20 days in total, and there were no PICC occlusion, no catheter thrombosis, and no catheter related bloodstream infection. Moreover, no observation showed thrombopenia and aggravated coagulation disorders resulted from heparin. Conclusion The evidence-based medicine method is an effective way to make reasonable heparin scheme for neonate, so as to prevent PICC occlusion, reduce catheter thrombosis, decrease risks of catheter related blood circulation infection, assure successful completion of treatment, and guarantee the safety of patients.

    Release date:2016-09-07 10:58 Export PDF Favorites Scan
  • 肝素钠在外周静脉置入中心静脉导管堵塞再通中的应用

    【摘要】 目的 通过肝素钠注射液抗凝的原理对外周静脉置入中心静脉导管(PICC)堵塞进行疏通,观察肝素钠在PICC导管堵塞再通中的应用效果。 方法 2009年5-10月对80例需化疗的肿瘤患者行PICC置管治疗,其中6例PICC导管堵塞, 将PICC导管接口的肝素帽更换为三通管,一接口连接吸好少量生理盐水的20 mL注射器,另一接口连接吸好肝素钠的5 mL注射器,利用导管内负压将肝素液吸进导管,反复抽吸进行疏通。 结果 6例PICC导管堵塞患者中有4例再通成功,2例失败予拔管;再通成功率为66.7%(4/6)。 结论 在患者使用PICC 的过程中,应采取积极、有效的措施预防导管堵塞;肝素钠在PICC导管堵塞再通中的应用有效,对临床有较大帮助。

    Release date:2016-09-08 09:52 Export PDF Favorites Scan
  • 冲管方式对胃癌术后患者鼻肠管堵塞的影响

    目的探讨不同冲管方式对预防鼻肠管堵塞的影响及作用。 方法对2013年11月-2014年4月收治的50例胃癌术后行肠内营养患者,按住院单双号分为试验组(n=27)和对照组(n=23),分别在鼻肠管输注营养液时采用脉冲式冲管和常规缓慢推注冲管方式,观察比较两种不同冲管方式对鼻肠管的堵塞发生情况。 结果试验组共冲管513例次,发生堵塞5例次,发生率0.97%;对照组共冲管437例次,发生堵塞18例次,发生率4.12%;两组堵管率差异有统计学意义(χ2=9.867,P=0.002)。 结论脉冲式冲管可以预防导管堵塞的发生,是顺利进行肠内营养的有效措施。

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  • Design of Flow Cytometry Self-cleaning System

    In order to solve the problem of the micro flow cell clogging, and to improve the reliability of the flow cytometry system, a new method was proposed for hydrodynamic self-cleaning system. By analyzing the flow cell focus principle, we considered that to obtain stable single cell flow, the stable pressure in the flow chamber must be ensured. Therefore, we established a diagnosis method of clogging by the pressure detecting, and designed a self-cleaning system. Then we built up corresponding experimental systems. Experiments and testing showed that the self-cleaning system could improve the flow and resolve the clogging problem.

    Release date:2017-01-17 06:17 Export PDF Favorites Scan
  • A case of “chimney” stent technique for left coronary ostia obstruction during transcatheter aortic valve replacement

    This case was a 78-year-old woman characterized exertional dyspnea and diagnosed with severe aortic stenosis. Preoperative evaluation revealed that the patient had a very high surgical risk, so transcatheter aortic valve replacement (TAVR) was proposed. But this patient was at high risk of coronary obstruction. After weighing advantages and disadvantages, the heart team decided to choose TAVR under the protection of guide wire and balloon at last. Left coronary ostia obstruction happened after self-expanding valve released during TAVR. Then, emergency “chimney” stent implantation was performed. Finally, TAVR and coronary revascularization was successfully completed. The patient’s condition was improved after TAVR and being good in follow-up. Based on this case, risk factors of coronary obstruction during TAVR and effectiveness and safety of “chimney” stent technique was discussed.

    Release date:2020-05-26 02:34 Export PDF Favorites Scan
  • Transcatheter aortic valve replacement complicated with coronary obstruction and retroperitoneal hematoma: a case report

    This article presented the clinical diagnosis and management of a patient with severe aortic regurgitation and moderate aortic stenosis who underwent transcatheter aortic valve replacement complicated with coronary obstruction and retroperitoneal hematoma. The hemodynamics collapsed during the procedure, and transcatheter aortic valve replacement was performed under support of extracorporeal membrane oxygenation and coronary protection. After a negative coronary angiography, the wire was extracted, but a repeated angiography showed left coronary obstruction, so a coronary stent was implanted to the ostium of left coronary artery through the grid of the valve stent. Abdominal CT showed a giant retroperitoneal hematoma 2 weeks after transcatheter aortic valve replacement, and the emergent angiography indicated contrast leakage from left external iliac artery, so a balloon compression was performed followed by a covered stent implantation. This article also provided the clinical characteristics, risk factors and management of coronary obstruction and vascular complication for clinical reference.

    Release date:2020-10-26 03:00 Export PDF Favorites Scan
  • Incomplete left main coronary obstruction after transcatheter aortic valve replacement for severe aortic stenosis: a case report

    An 84-year-old severe aortic stenosis patient admitted with acute heart failure was reported. Transcatheter aortic valve replacement (TAVR) was proposed. The patient was at high risk of the left coronary artery occlusion in preoperative and intraoperative evaluation. Coronary artery protection was performed by pre-embedded coronary artery guide wire and stent during the TAVR. The left coronary artery was partially blocked by valve leaflet after 23 mm self-expanding aortic valve was released. Coronary revascularization was not performed as the coronary blood flow was not affected. However, the patient suffered acute myocardial infarction with hypotension on the third day after TAVR. Emergency angiography showed that left coronary artery was more blocked than before and the condition improved after left main coronary stent implantation. This case suggested that aggressive coronary revascularization should be considered for high risk of coronary artery obstruction during TAVR, especially for partial obstruction of coronary artery.

    Release date:2020-10-26 03:00 Export PDF Favorites Scan
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