激光小血管吻合术后血清锌的变化

激光小血管吻合（ＬＡＭＡ）较之传统缝合吻合术具有快速、损伤小、利于较深手术野下操作等优点。用于ＬＡＭＡ的激光主要有ＣＯ２、Ａｒ＋和Ｎｄ：ＹＡＧ三种。本实验将１００只ＳＤ大鼠随机分为４组，在ＬＡＭＡ后０～１５３天中对大鼠血清锌水平的变化进行了观察，比较了这三种激光对１ｍｍ以下小动脉ＬＡＭＡ的结果。吻合颈总动脉互１３９条，ＣＯ２、Ａｒ＋和Ｎｄ：ＹＡＧＬＡＭＡ组远期通畅率分别为９５．９％、９７．７％和７３．９％（Ｐ＜Ｏ．００５）。血清锌以Ｎｄ：ＹＡＧ组降低显著（Ｐ＜Ｏ．０５）。对血锌与ＬＡＭＡ后组织损伤愈合过程的关系进行了讨论，认为ＣＯ２ＬＡＭＡ较Ｎｄ：ＹＡＧＬＡＭＡ为优．     

氦—氖激光血管内照射治疗头痛的观察及护理

低能量氦-氖激光血管内照射治疗高血压病头痛及血管神经性头痛48例,结果显示此法能较好地缓解症状,并且以治疗两个疗程(10次)为佳,治疗过程中无明显不良反应.     

Multiphase helical CT findings after percutaneous ablation procedures for hepatocellular carcinoma

Background: Multiple-phase helical computed tomography (CT) has been regarded as the method of choice in the evaluation of patients with hepatocellular carcinoma (HCC) treated by nonsurgical procedures. The aim of this article was to report our experience in the assessment of nodular and parenchymal changes recognizable after various percutaneous ablation therapies. Methods: We reviewed the studies of 116 consecutive patients with HCC treated with multisession percutaneous ethanol injection (56 patients, 98 nodules), single-session percutaneous ethanol injection (14 patients, 31 nodules), radiofrequency thermal ablation (32 patients, 48 nodules), and interstitial laser photocoagulation (14 patients, 25 nodules). CT had been performed 3–28 days after the last session (mean = 18 days) with unenhanced helical acquisition and with contrast-enhanced double- or triple-phase helical acquisition. Results: Persisting neoplastic tissue was identified within 54.5% of the nodules. It was located centrally in 4.5% of these nodules, peripherally in 11%, and eccentrically in 84.5%, and its shape was crescent in 58%, globular in 24.5%, and other in 16%. On arterial phase scans, viable tumor was hyperdense in 97% of the lesions and isodense in 3%; on portal phase scans, the tumor was hyperdense in 20%, isodense in 28%, and hypodense in 52%; on delayed phase scans, the tumor was consistently hypodense. Tumor necrosis was always hypodense on contrast-enhanced scans. On unenhanced images, 7.4% of the nodules were undetectable. Nodule diameter appeared as unchanged in 53% of the nodules and as larger in 47%; its shape was unchanged in 54% and modified in 46%; its margins were unchanged in 36% and modified in 64%. A rim of granulation tissue was detected around 15% of the nodules, and a perilesional transient attenuation difference was detected in 21%. Perihepatic effusion was seen in 13% of the patients, segmental biliary duct dilation and local atrophy each in 9%, arterioportal fistula in 6%, portal vein thrombosis, subcapsular collection and pleural effusion each in 7%, hepatic infarction in 5%, and inferior vena cava thrombosis in 2%. Conclusion: Percutaneous ablation of HCC may cause several changes. Knowledge of their CT appearance is mandatory to correctly assess and manage this tumor. RID=" ID=" <E5>Correspondence to:</E5> O. Catalano Received: 6 April 2000/Accepted: 3 May 2000     

经尿道前列腺电切术与选择性绿激光前列腺汽化术治疗良性前列腺增生症临床疗效对比

目的对比经尿道前列腺电切术(TURP)与经尿道选择性绿激光前列腺汽化术(PVP)两种微创术式治疗良性前列腺增生症(BPH)的临床疗效。方法对43例BPH患者的临床疗效进行比较,分别统计分析TURP和PVP两种术式在手术时间、术中出血量、术后导尿管留置天数、术后1月IPSS评分降低值、术后1月最大尿流率增加值、手术并发症发生率的差异。结果 PVP组较TURP组手术时间短、术中出血量少、术后留置导尿管时间短,两组有统计学差异;在术后1月IPSS评分降低值、最大尿流率增加值方面两组无明显统计学差异。PVP组的手术并发症发生率低于TURP组,但无统计学差异。结论 PVP是一种安全有效的治疗BPH的手术方式,相较于TURP更安全、患者痛苦少,两者术后疗效相似。     

Diagnostic Value of Automated 3D Ultrasound for Incisional Hernia

The automated volume scanning system (AVSS) has been applied in breast diseases, but its use in incisional hernias has not been reported. In this study, conventional handheld B-mode ultrasound (HHUS) and AVSS examined a total of 122 hernia defects in 78 patients. The results from two modalities were then compared with surgical findings for the purpose of assessing the diagnostic value of AVSS. Statistics showed that surgeries identified 38 small, 23 medium and 17 large incisional hernias. The results of AVSS completely agreed with surgical findings; however, HHUS misidentified nine large hernias as medium and seven medium hernias as large. AVSS proved to be more accurate than HHUS in measuring the length and width of the hernia. It also outperformed HHUS in both detecting the incisional hernias (91.8% vs. 78.7%, p = 0.00) and determining hernia contents (89.3% vs. 68.0%, p = 0.00). Moreover, the coronal images AVSS obtained clearly displayed the shapes of the hernias, with 46 being regular and 32 irregular. Overall, AVSS can be used as a promising diagnostic modality for incisional hernias.     

平衡推拿疗法配合低强度激光治疗肌力失衡性颈椎病的临床研究

目的:以中医内病外治的理论,探讨平衡推拿疗法配合低强度激光治疗肌力失衡性颈椎病的疗效作用。方法:158例肌力失衡性颈椎病患者随机分为3组,用平衡推拿疗法45例(推拿组),采用低强度激光治疗48例(理疗组),用平衡推拿疗法配合低强度激光治疗65例(治疗组),观察症状、体征。结果:治疗组与理疗组比较,有显著差异(P<0.05);治疗组与推拿组比较,有显著差异(P<0.05)。结论:平衡推拿疗法配合低强度激光治疗肌力失衡性颈椎病优于单用一种疗法。     

Identification of differentially expressed proteins in human stage I lung adenocarcinoma and tumor-adjacent tissues with two-dimension gel electrophoresis profiling

Objective： The aim of this study was to establish reproducible two-dimensional electrophoretic assay used for profiling and identification of differentially expressed proteins in human stage I lung adenocarcinoma and paired normal tumor-adjacent tissue. Methods： The proteins from 12 human stage I lung adenocarcinoma tissues and normal tumor-adjacent tissues were separated using isoelectric focusing electrophoresis （the first dimension） and the subsequent homogeneous SDS-polyacrylamide gel electrophoresis （SDS-PAGE） （the second dimension）. The differentially expressed proteins were determined with PDQuest image analysis software, and identified using matrix-assisted laser desorption/ionization time of flight mass spectrometry （MALDI-TOF-MS） and database searching. Results： The well-reproducible 2-DE gel patterns of human stage I lung adenocarcinoma and normal tumor-adjacent tissues were profiled and 26 differentially expressed proteins uncovered. Nine of these 26 protein spots were cut out from the preparation gels and determined with MALDI-TOF-MS. Searching against the protein database, four candidate proteins were identified. They were 60S acidic ribosomal protein P2, Cathepsin B1, Apolipoprotein A-I precursor, and La 4.1 protein. Conclusion： In this study, high reproducible 2-DE gel protein images of human stage I lung adenocarcinoma and paired normal tumor-adjacent tissues were achieved successfully, and 4 differentially expressed proteins were revealed. These data will be helpful for screen of early biomarker and study of molecular mechanisms of human lung adenocarcinoma.     

辣椒碱-羟丙基-β-环糊精包合物制备鉴定及 热力学稳定性研究

目的:制备及鉴定辣椒碱-HP-β-CD包合物,并考察辣椒碱和HP-β-CD之间的包合摩尔比及包合过程的热力学常数.方法:采用饱和水溶液法制备辣椒碱-HP-β-CD包合物,以差示扫描量热法(DSC)、X射线衍射法(XRD)和红外光谱法(IR)对包合物进行鉴定,通过表观溶解度法考察包合物中主客分子之间的包合摩尔比及包合过程的热力学常数.结果:25,35,45℃下辣椒碱和HP-β-CD能形成1:1摩尔比包合物,相溶解度图呈A_L型.结论:辣椒碱-羟丙基-β-环糊精包合物能显著增大药物的溶解度.     

Study on the Shear Modulus Based Equivalent Homogenization Methods of Multi-Layer BCC Lattice Sandwich

In this paper, the shear modulus based equivalent homogenization methods of multi-layer BCC (body-centered cubic) lattice sandwich structures have been studied using analytical, experimental, and finite element methods. In the analytical approach, the multiple strut-deformation patterns were introduced in the derivations of the shear modulus based on Euler–Bernoulli beam theory and Timoshenko beam theory according to different boundary conditions. The analytical shear modulus of three types of rectangle shaped sandwich BCC lattice structures was derived. Finite element models of the BCC lattice structures by ANSYS were conducted to estimate the analytical solutions. Butterfly style sandwich BCC lattice structures were printed by SLM technology using 304 stainless steel (06Cr19Ni10), and corresponding shear experiments using modified Arcan Rig experimental devices were conducted to validate the analytical and numerical calculations. Good agreements were observed among the analytical, numerical, and experimental results.     

Additive Manufacturing as a Solution to Challenges Associated with Heat Pipe Production

The aim of this review is to present the recent developments in heat pipe production, which respond to the current technical problems related to the wide implementation of this technology. A novel approach in HP manufacturing is to utilise hi-tech additive manufacturing techniques where the most complicated geometries are fabricated layer-by-layer directly from a digital file. This technology might be a solution to various challenges that exist in HP production, i.e., (1) manufacturing of complex or unusual geometries HPs; (2) manufacturing complicated and efficient homogenous wick structures with desired porosity, uniform pore sizes, permeability, thickness and where the pores are evenly distributed; (3) manufacturing a gravity friendly wick structures; (4) high customisation and production time; (5) high costs; (6) difficulties in the integration of the HP into a unit chassis that enables direct thermal management of heated element and decrease its total thermal resistance; (7) high weight and material use of the part; (8) difficulties in sealing; (9) deformation of the flat shape HPs caused by the high pressure and uneven distribution of stress in the casing, among others.