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Is Robotic Arm Assisted Total Hip Arthroplasty More Bone Preserving than Conventional Hip Replacements and Hip Resurfacing?

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Open Journal of Orthopedics 2022年第6期12卷 259-267页

作者： rajitha gunaratne Ben Levy Harry D’Souza Arash Taheri Curtin University Bentley Australia Joondalup Health Campus Joondalup Australia Sir Charles Gairdner Hospital North Metropolitan Health Service Nedlands Australia Joondalup Orthopaedic Group Joondalup Australia

Background: Total hip arthroplasty (THA) is a common procedure that is increasingly being performed in younger patients. Deep acetabular reaming will result in more bone loss and the need for large acetabular components to be implanted. It can also lead to impingement, loosening, an altered center of rotation, and intraoperative periprosthetic fracture. The purpose of this study is to determine whether the single ream, robotic arm-assisted (RAA) THA can preserve a greater volume of bone stock compared to conventional hip replacement and resurfacing. Methods: We prospectively recruited 69 patients who had undergone primary THA using the Stryker Trident Acetabular System®in combination with the Stryker RAA System (MAKO)®and compared their mean reaming weight (g) with that of conventional hip replacement and resurfacing, as measured by Brennan et al. Comparison of acetabular reaming during hip resurfacing versus uncemented THA (J Orthop Surg. 2009;17(1): 42-46). Results: The mean reaming weight using the MAKO system was 9.08 g, which was 29% less than the reaming weight using uncemented THA and hip resurfacing of 12.75 g. None of the acetabular cups required screw fixation. During the 35-month follow-up period, there were no complications related to cup placement or positioning. Conclusions: The use of RAA THA results in statistically significant preservation of acetabular bone compared to conventional hip replacement and resurfacing. This approach reflects the increased precision offered by RAA single reaming. Surgeons may consider utilizing RAA THA, particularly in younger patients, to better preserve bone stock as this could potentially impact future revision procedures.

关键词： Arthroplasty Replacement Hip

Restoration of Koggala lagoon: Modelling approach in evaluating lagoon water budget and flow characteristics

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Journal of Environmental Sciences 2010年第6期22卷 813-819页

作者： Gayan Lakendra gunaratne Norio Tanaka Prasanna Amarasekara Tilak Priyadarshana Jagath Manatunge Institute for Environmental Science and Technology Graduate School of Science and EngineeringSaitama University Faculty of Fisheries and Marine Sciences & Technology University of Ruhuna Department of Civil Engineering Faculty of EngineeringUniversity of Moratuwa

Groyne system modification is described related to restoration efforts to Koggaia lagoon, Sri *** large-scale unplanned sand removal at the lagoon mouth shifted the formation of sand bar towards the lagoon and made adverse effects on its ecosystem. After the removal of the natural sand bar, groyne system was constructed to avoid sand deposition in the lagoon and to protect the highway bridge （across the lagoon outlet channel） from the wave attack. The existing groyne system resulted the lagoon mouth being permanently open to sea which in turn led to many environmental problems. Groyne system modification is proposed in this study to reduce the sea water *** budget and two-dimensional depth averaged hydrodynamic model were developed for understanding the hydrologic and flow characteristics of the lagoon. Numerical experiments was performed at lagoon mouth area for two cases：（1） existing condition and （2） proposed rubble mound groyne system condition. Comparison of results was obtained for both cases to describe flow pattern at lagoon mouth. Results further showed, the width should be reduced to a maximum of 40 m. Proposed mouth width （40 m） pushed the salting factor towards 0.5 from 0.68. Salting factor reduction with the groyne modification may result a predominant influence of fresh water which may in turn lead lagoon to a fresh water ecosystem.

关键词： Koggala lagoon hydrodynamic modelling lagoon hydrology

Two-day enema antibiotic therapy for parasite eradication and resolution of symptoms

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World Journal of Gastroenterology 2020年第26期26卷 3792-3799页

作者： Niloufar Roshan Annabel Clancy Anoja W gunaratne Antoinette LeBusque Denise Pilarinos Thomas J Borody Centre for Digestive Diseases New South Wales 2046Australia

BACKGROUND Blastocystis hominis(***)and Dientamoeba fragilis(***)are two protozoan parasites of human bowel that are found throughout the *** is still debate about the pathogenicity of these protozoans,despite them being commonly associated with gastrointestinal symptoms and can cause health issue in both children and *** parasites are usually transmitted through faecal-oral contact particularly under poor hygiene conditions or food/water *** a person is infected,the parasites live in the large intestine and are passed in the *** To investigate the effect of triple antibiotic therapy using enema infusion in the treatment of *** and *** *** This retrospective longitudinal study was conducted in a single medical centre,which included fifty-four patients(≥18 years)who were positive for ***,*** or both between 2017 and *** treatment consisted of triple antibiotics that were infused over two consecutive days through rectal *** samples were collected from participants pre-and post-treatment and were tested for parasites using microscopy and polymerase chain ***’symptoms were recorded prior and after the treatment as well as patient demographic *** Patients(n=54),were either positive for ***(37%),***(35%)or both(28%).All patients completed the two-day treatment and no serious adverse effect was *** most common side effect experienced by the patients during the treatment was urine discolouration which was cleared by six weeks of *** symptoms reported prior to treatment were diarrhoea,abdominal pain,constipation and *** symptoms included abdominal discomfort,dizziness and blood in the ***-nine percent of patients completed a final stool test *** six weeks post-treatment,79%of patients cleared the parasites from their *** such as abdominal discomfort,dizziness and blood

关键词： Blastocystis hominis Dientamoeba fragilis Parasitic infection Antibiotics Triple therapy Rectal enema route

Exporting to Internationalise： Only a Small Percentage of Emerging SMEs From Developing Countries Succeed When a Large Majority Fail

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Management Studies 2014年第7期2卷 427-446页

作者： K. Asoka gunaratne Unitec Institute of Technology Auckland New Zealand

Small and Medium Enterprises （SMEs）, account for more than 95% of all businesses in many countries. These foster economic development and are significant contributors to employment and wealth generation. An observed phenomenon is the increased momentum of internationalization of SMEs in the developed world. A concern however, is the small percentage of the SMEs from developing countries emulating this trend. Also unexplained are：（1） What makes a small percentage of SMEs in developing countries succeed in internationalizing their businesses when the large majority fail？（2） What provides the differential advantage to the growth businesses？ Therefore, this paper attempts to address the research question ＂what impacts the owner-managers＇（OMs＇） perceptions of internal and external barriers have on the internationalization process of the SMEs in a developing country？＂ The data was gathered from OMs of SMEs using a mail survey. Export growth was used as the dependent variable in the study. The differential performance of growth and non-growth SMEs in foreign markets is elucidated in relation to the OMs＇ perception of informational, operational, marketing, and environmental barriers to growth. Significant differences were found between growth and non-growth businesses in relation to the OMs＇ perception of the above barriers investigated.

关键词： theories of internationalisation conservative-entrepreneurial dichotomy resource poverty owner-managers' (OMs') human capital perceptions of barriers to exports

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茶叶出口拍卖的国际经验

世界农业 2014年第5期 163-167页

作者：苏祝成许咏梅 L.H.P.gunaratne 浙江农林大学浙江工商大学 Peradeniya University

世界主要4个茶叶生产国中,唯独中国没有建立出口拍卖市场。茶叶拍卖交易需要相对集中的市场结构,然而,茶园小规模经营是世界普遍的生产方式。针对茶叶小生产与拍卖大宗交易的矛盾,各个国家采取不同的制度设计,斯里兰卡的纵向契约分成制... 详细信息

世界主要4个茶叶生产国中,唯独中国没有建立出口拍卖市场。茶叶拍卖交易需要相对集中的市场结构,然而,茶园小规模经营是世界普遍的生产方式。针对茶叶小生产与拍卖大宗交易的矛盾,各个国家采取不同的制度设计,斯里兰卡的纵向契约分成制和日本的横向合作组织具有代表性。中国绿茶国际垄断性是建立出口拍卖市场的产业基础,但有效实施拍卖交易仍需要制度环境的重构。

关键词：茶叶出口拍卖国际经验

茶产业在斯里兰卡国民经济中地位及面临的问题

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南亚研究季刊 2007年第2期 26-29页

作者：苏祝成 L.H.P.gunaratne 浙江大学茶学系斯里兰卡Paradeniya大学

茶叶是斯里兰卡最重要的出口创汇产品,行业就业人数约占斯里兰卡总就业人口的1/7。然而,近几年,斯里兰卡茶产业发展面临劳动力成本上涨、卢比贬值和茶叶深加工技术缺乏等问题,这将影响斯里兰卡的经济。

关键词：茶产业斯里兰卡经济地位问题

斯里兰卡一个热带泻湖系统的鱼类资源和渔业生产

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人类环境杂志 1995年第7期24卷 402-410页

作者： P.Dayaratne A.B.A.K.gunaratne M.M.Alwis 王理顺摆万奇国家水产资源局(NARA)海洋生物研究处国家水产资源局(NARA)海洋生物学研究处

本文根据1990年9月～1992年10月所作的调查,描述了斯里兰卡西北省普塔勒姆/Mundel河口系统的渔业生产和鱼类资源。普塔勒姆泻湖和Mundel湖渔业生产的特点是物种繁多、捕捞工具多样。大约1700只渔船所使用的渔具有浮动刺网、底网、三层... 详细信息

本文根据1990年9月～1992年10月所作的调查,描述了斯里兰卡西北省普塔勒姆/Mundel河口系统的渔业生产和鱼类资源。普塔勒姆泻湖和Mundel湖渔业生产的特点是物种繁多、捕捞工具多样。大约1700只渔船所使用的渔具有浮动刺网、底网、三层刺网、拖网和围网,主要捕捞有鳍鱼类和甲壳动物类资源。此外,在浅水区还广泛使用各种推网、拉网和拖网。在普塔勒姆泻湖中还使用诱捕装置捕捉泥蟹。大约50%的渔船装备有船外马达,其它50%则是传统的木舟和木筏。捕捞活动在连接普塔勒姆泻湖和Mundel湖的Dutch运河也很集中。这两个水域的捕捞活动全年都在进行,但在西南季风期间(即5～9月),由于公海风大浪高,可以看到这时的捕捞活动有所增加。在此期间,通常在公海从事渔业生产的渔民,将捕捞场所转移到了河口系统。在过去10年间,河口系统中机动渔船的捕捞活动大大增加了。配备着尼龙刺网和三层刺网的玻璃钢(FRP)船是主要的渔船/渔具组合。对于刺网,这种组合形式的捕获率每次约为18kg,若用三层刺网,每次为12kg。据估计,该河口系统总的年捕获量1991年为5117t,1992年为2967t。产量下降的主要原因是鱼类储量的减少,在某种程度上也是捕捞活动下降及改变的结果。对普塔勒姆泻湖和Mundel湖渔业生产所作的生物经济评价表明,捕捞活动至少应分别减少20%和50%,或者加大鱼网的网眼。看来,在Mundel湖使用拖网,以及在普塔勒姆泻湖使用牵网和推网造成了很大的环境破坏。基于这些结果,本文相应提出了一些管理上的建议。

关键词：斯里兰卡热带泻湖系统鱼类资源渔业生产