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Medical progress through technology最新文献

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The medical equipment acquisition problems in Brazil and most of Latin American countries. 巴西和大多数拉丁美洲国家的医疗设备购置问题。
Medical progress through technology Pub Date : 1994-01-01
S J Calil
{"title":"The medical equipment acquisition problems in Brazil and most of Latin American countries.","authors":"S J Calil","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The process of acquiring medical equipments in Brazil and other Latin American countries is a continuing learning process. Several conditions in the acquisition contract have to be established by the buyer, since the consumer protection law is nonexistent or not respected by some vendors. Furthermore, few countries have laboratories for testing the performance of the equipments in general. The recommendations of this paper are based on 8 years of experience in Clinical Engineering activities in a University health complex of about 600 beds.</p>","PeriodicalId":76136,"journal":{"name":"Medical progress through technology","volume":"20 1-2","pages":"111-4"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18964339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Metallosis due to abnormal abrasion of the femoral head in bipolar hip prosthesis. Implant retrieval and analysis in six cases. 双相髋关节假体股骨头异常磨损所致金属中毒。种植体回收6例分析。
Medical progress through technology Pub Date : 1994-01-01
Y Matsuda, T Yamamuro
{"title":"Metallosis due to abnormal abrasion of the femoral head in bipolar hip prosthesis. Implant retrieval and analysis in six cases.","authors":"Y Matsuda,&nbsp;T Yamamuro","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>We report on six cases of metallosis which developed in bipolar hip prosthesis due to ceramic screws used for fixation of bone grafts. Two patients experienced severe metallosis due to abnormal abrasion of the femoral head. At the revision surgery, proliferated black synovia was found. Analyses of the retrieved prostheses revealed numerous small particles of alumina ceramic on the inner surface of the bearing insert of UHMWPE. These particles came from the broken ceramic screws, and scraped away the metallic femoral head resulting in severe metallosis. In four patients, the outer head came into direct contact with ceramic screws and mild metallosis was observed at revision surgery.</p>","PeriodicalId":76136,"journal":{"name":"Medical progress through technology","volume":"20 3-4","pages":"185-9"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18878691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Human vestibular evoked responses. 人类前庭诱发反应。
Medical progress through technology Pub Date : 1994-01-01
C Muñoz-Gamboa, J Jiménez-Cruz
{"title":"Human vestibular evoked responses.","authors":"C Muñoz-Gamboa,&nbsp;J Jiménez-Cruz","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The results of an experimental series dedicated to the acquisition of human vestibular evoked responses are presented. In these series, manual stimulation is applied to a normal group of subjects with rotational acceleration impulses. Every stimulus is large in magnitude and very short in duration, producing small head movements of only a few degrees through a specially designed head immobilization helmet. Results correspond to middle latency vestibular evoked responses.</p>","PeriodicalId":76136,"journal":{"name":"Medical progress through technology","volume":"20 1-2","pages":"31-5"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18964342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fractographic analysis of failed porous and surface-coated cobalt-chromium alloy total joint replacements. 多孔表面涂层钴铬合金全关节置换失效断口分析。
Medical progress through technology Pub Date : 1994-01-01
D H Kohn, P Ducheyne, J M Cuckler, A C Chu, S Radin
{"title":"Fractographic analysis of failed porous and surface-coated cobalt-chromium alloy total joint replacements.","authors":"D H Kohn,&nbsp;P Ducheyne,&nbsp;J M Cuckler,&nbsp;A C Chu,&nbsp;S Radin","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Fractographic analyses were performed on retrieved porous and surface-coated cobalt-chromium alloy prostheses which were revised because of metallurgical fracture. Two femoral neck fractures and one fractured post of a femoral component of a total knee replacements were retrieved and analyzed via light, stereo and scanning electron microscopy (SEM). In all cases, fatigue was the mechanism of failure. The life time of these prostheses was 3-5 years. The porous coating; microstructural features, including large grains, carbides, porosity, inclusions and defects; design and manufacturing defects were all likely causative factors in these fatigue failures. In light of these and other reported fractures, further study of fatigue mechanisms and improvement of design and manufacturing processes are warranted.</p>","PeriodicalId":76136,"journal":{"name":"Medical progress through technology","volume":"20 3-4","pages":"169-77"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18874498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Systemic and local silver accumulation after total hip replacement using silver-impregnated bone cement. 银浸渍骨水泥全髋关节置换术后全身和局部银积累。
Medical progress through technology Pub Date : 1994-01-01
E Sudmann, H Vik, M Rait, K Todnem, K J Andersen, K Julsham, O Flesland, J Rungby
{"title":"Systemic and local silver accumulation after total hip replacement using silver-impregnated bone cement.","authors":"E Sudmann,&nbsp;H Vik,&nbsp;M Rait,&nbsp;K Todnem,&nbsp;K J Andersen,&nbsp;K Julsham,&nbsp;O Flesland,&nbsp;J Rungby","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>In a patient, at revisional Christiansen total hip arthroplasty, silver-impregnated bone cement was used as prophylaxis against deep infection. Five years later the patient developed serious neurological deficits, and the prosthesis was loose. The loose Christiansen prosthesis and the silver-impregnated bone cement were removed and a Charnley prosthesis inserted. Intra-operatively the concentration of silver in fluid drawn from the hip joint was assessed to be about 1000 times the normal serum reference value, and tissue samples from the acetabulum were densely impregnated with silver. During the following 2 years the serum concentration of silver decreased from more than 60 times to 20 times the normal; simultaneously the patient partially recovered from her grave muscle paralysis.</p>","PeriodicalId":76136,"journal":{"name":"Medical progress through technology","volume":"20 3-4","pages":"179-84"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18878690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Clinical hemolysis with the St. Jude heart valve without paravalvular leak. 无瓣旁漏的St. Jude心脏瓣膜的临床溶血。
Medical progress through technology Pub Date : 1994-01-01
H Barmada, A Starr
{"title":"Clinical hemolysis with the St. Jude heart valve without paravalvular leak.","authors":"H Barmada,&nbsp;A Starr","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>In 1990 and 1991 we operated on 2 patients with persistent clinical hemolysis, in the absence of perivalvular leaks, who had had their mitral valves replaced with St. Jude Medical valve (SJMV) prostheses. The valves had been implanted 14 months and 3 months before, respectively. There were no other discernible causes for the hemolysis and when each SJMV was replaced the hemolysis disappeared in that patient. The first valve was not tested in the laboratory owing to its loss, but it looked normal. The second valve was tested and found to have regurgitation well within the usual limits for this valve. Fringe pattern interferometry indicated that the leading edge of each leaflet was flatter and less smooth than that of another SJMV. Reviewing the literature we find that idiopathic, persistent clinical hemolysis in recipients of St. Jude mechanical heart valves is a rare phenomenon, which has appeared in 4 reports totaling 9 cases. We discuss the suggested mechanisms involved, and add the possibility of leading leaflet edge characteristics.</p>","PeriodicalId":76136,"journal":{"name":"Medical progress through technology","volume":"20 3-4","pages":"191-4"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18878692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
World Congress on Medical Physics and Biomedical Engineering. Proceedings. Rio de Janeiro, Brazil, 21-26 August 1994. 世界医学物理学和生物医学工程大会。程序。1994年8月21日至26日，巴西里约热内卢。
Medical progress through technology Pub Date : 1994-01-01
{"title":"World Congress on Medical Physics and Biomedical Engineering. Proceedings. Rio de Janeiro, Brazil, 21-26 August 1994.","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":76136,"journal":{"name":"Medical progress through technology","volume":"20 1-2","pages":"1-114"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18964337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Silicone breast implant rupture: common/serious complication? 硅胶假体破裂:常见/严重并发症?
Medical progress through technology Pub Date : 1994-01-01
C M Malata, S Varma, M Scott, J C Liston, D T Sharpe
{"title":"Silicone breast implant rupture: common/serious complication?","authors":"C M Malata,&nbsp;S Varma,&nbsp;M Scott,&nbsp;J C Liston,&nbsp;D T Sharpe","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Of the potential health risks of silicone breast implants it is the concern about implant durability, life span and the possible association with connective tissue disease which has attracted most attention. A prospective study addressing these factors was therefore undertaken over an 11 month period. 51 patients presenting with significant capsular contracture, suspected prosthesis rupture or unrelieved implant-induced anxiety underwent revisional breast surgery after biochemical, haematological and immunological screening. Of these 51 patients (83 breasts), 14 (19 breasts) had ruptured implants (23% incidence). These were all smooth prostheses belonging to a cohort manufactured more than 10 years ago; their mean in situ duration being 12 years vs. 5.5 years for the intact group (p = 0.0024; Kruskal-Wallis one-way ANOVA). There were no systemic complications from implant rupture and the mean blood silicon level was normal. One patient with pre-existing pernicious anaemia had elevated autoantibodies. The mean ESR in the ruptured implant group was 6 mm/hour. It is concluded that rupture of breast implants is not as uncommon as hitherto thought and is strongly correlated with their in situ duration. In this study implant gel leakage was not associated with serious systemic effects.</p>","PeriodicalId":76136,"journal":{"name":"Medical progress through technology","volume":"20 3-4","pages":"251-60"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18876352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modern concepts of packaging surgical needles and suture. 现代包装手术针头和缝线的概念。
Medical progress through technology Pub Date : 1994-01-01
L K Noriega, G T Rodeheaver, J G Thacker, R F Edlich
{"title":"Modern concepts of packaging surgical needles and suture.","authors":"L K Noriega,&nbsp;G T Rodeheaver,&nbsp;J G Thacker,&nbsp;R F Edlich","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>A new, innovative packaging system for surgical needles and sutures has been developed that meets the special needs of surgical technologists. This packaging system consists of an overwrap, or breather pouch, as well as an innerwrap containing the suture swaged to a surgical needle. The flaps of the overwrap are offset and serrated to facilitate the opening and sterile transfer of the inner packet to the sterile field. The inner packet contains either a plastic labyrinth, or craft board that maintains the suture as straight as possible until knot construction. The needle swaged to a suture is 'parked' in foam to protect its sharp cutting edges and point.</p>","PeriodicalId":76136,"journal":{"name":"Medical progress through technology","volume":"20 3-4","pages":"271-9"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18876354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluation of the Omniflow collagen-polymer vascular prosthesis. 全流胶原-聚合物血管假体的评价。
Medical progress through technology Pub Date : 1994-01-01
J A Werkmeister, J F White, J A Ramshaw
{"title":"Evaluation of the Omniflow collagen-polymer vascular prosthesis.","authors":"J A Werkmeister,&nbsp;J F White,&nbsp;J A Ramshaw","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The Omniflow Vascular Prosthesis (OVP) is a truly integrated bio-synthetic composite of polyester mesh and ovine connective tissue components. In animal and human studies, the prosthesis has demonstrated long-term patency rates comparable and often better than alternate surgical replacements, with minimal aneurysmal or thrombotic problems. Immunohistological and TEM analysis of explants of OVP I provide good evidence for the excellent in vivo performance and are reviewed below. In addition, new data from explants of the OVP II, a later version of the Omniflow, are also described. These explant analyses have been enhanced by use of a library of highly specific monoclonal antibodies which can discriminate between collagens from different species.</p>","PeriodicalId":76136,"journal":{"name":"Medical progress through technology","volume":"20 3-4","pages":"231-42"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18878696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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