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  • 1
    Digitale Medien
    Digitale Medien
    s.l. : American Chemical Society
    The @journal of organic chemistry 47 (1982), S. 1435-1438 
    ISSN: 1520-6904
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
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  • 2
    Digitale Medien
    Digitale Medien
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 70 (1997), S. 1040-1042 
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: We tried to design the magnet exhibiting magnetic pole (N and S) inversion by photostimuli. The magnetization of Fe1.5IICrIII(CN)6⋅7.5H 2O was changed in a photon mode by visible light. A ferro-ferrimagnet (Fe0.40IIMn0.60II)1.5 CrIII(CN)6⋅7.5H2O mixed by ferromagnetic (Fe–Cr system showing the change of magnetization by optical stimuli) site and ferrimagnetic (Mn–Cr system showing no optical response) site showed negative magnetization at the temperature lower than compensation temperature (Tcomp=19 K). In this mixed metal cyanide magnet we have succeeded in demonstrating a novel magnetic behavior "photoinduced magnetic pole inversion." Moreover, the magnetic pole inversion can be induced repeatedly by alternate optical and thermal stimulations. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
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  • 3
    ISSN: 1436-2813
    Schlagwort(e): vascular surgery ; arteriovenous fistula ; feeding artery
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Five cases of congenital arteriovenous fistula in the gluteal region have been encountered in our department in the past 20 years. In all cases, the fistulous masses were in the connective tissue between the gluteal muscles and well-localized. Preoperative angiography showed the feeding arteries to be the superior gluteal, the inferior gluteal, and/or the lateral femoral circumflex arteries, and all the arteriovenous fistulae were excised almost completely with success. In this report, we emphasize the importance of precise estimation of the feeding arteries on preoperative angiography and ligating them before excising the fistulous masses, to ensure safe surgical treatment.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    Surgery today 19 (1989), S. 301-311 
    ISSN: 1436-2813
    Schlagwort(e): double velour graft ; healing of vascular prosthesis ; graft infection ; suture line aneurysm
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Thirty-one Dacron double velour prostheses removed from 16 patients were studied microscopically in order to elucidate the changes they underwent following implantation. The process of incorporation was divided into three phases. In the initial phase, immediately following the implantation, the prostheses became surrounded by a fibrin meshwork. In the organizing phase, which sets in 10 weeks after the implantation, there was an external fibrous capsular formation around the initially fibrin-infiltrated grafts. There was also fibroblastic ingrowth and granulation formation among the interstices and the prostheses showed firm adhesion to the surrounding tissues. One year following the implantation, after most of the luminal surfaces had been covered with collagen tissues, the cellular infiltration subsided and the graft passed into the stable phase. Foreign body giant cells and lymphocytes were seen throughout the study period. These prostheses were then compared with other prostheses which do not have velour structures. The nonvelour grafts showed less adhesion to the surrounding tissues. Microscopically, cellular reaction and collagenous ingrowth were also less. The velour surface thus seems to stimulate granulation ingrowth and to contribute to the firm adhesion of the graft to the surrounding tissues. This firm adhesion enhances resistance to infection and is considered safer in case of suture aneurysm formation.
    Materialart: Digitale Medien
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  • 5
    ISSN: 1436-2813
    Schlagwort(e): human umbilical vein graft ; Biograft ; graft aneurysm ; biomaterial ; degradation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract A retrospective analysis of the long-term behavior of 111 glutaraldehyde-tanned human umbilical vein (HUV) grafts implanted between September 1977 and December 1993 was conducted. A total of 81 patients, with a mean age of 68.7 years, received the grafts and were followed up for between 1 and 131 months. The 5-year primary cumulative patency rate for above-knee femoropopliteal bypass was 83.1%, whereas that of other bypasses was 60.9%. An aneurysm of the graft was defined as a physically apparent localized dilatation, with diffuse ectasia being excluded. There were 11 aneurysms found in 9 grafts, 2 of which arose at the factory-made suture lines. The accumulated incidence of aneurysms had reached 21.9% by the 6th year. One aneurysm compressed the graft and resulted in limb-threatening ischemia and another resulted in frank rupture. Moreover, reinforcement of the mesh could not prevent aneurysm development, the repair of which is mandatory due to the risk of rupture and acute thrombosis. The HUV grafts showed an acceptable patency rate in the above-knee location, but the incidence of aneurysm formation after 5 years was abnormally high. Thus, both the risks and benefits of HUV grafts must be taken into account when considering their clinical application.
    Materialart: Digitale Medien
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  • 6
    ISSN: 1436-2813
    Schlagwort(e): chronic arterial occlusive disease ; lower extremity revascularization ; autogenous vein bypass ; nondissection method ; long-term patency
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract We report herein on our 12-year experience of performing autogenous vein grafting in the lower extremity using a nondissection method. This method involves limiting preparation for the distal anastomosis to exposure of the anterior surface of the vascular sheath, and substituting an Esmarch's rubber bandage or a pneumatic tourniquet for vascular clamps. A series of 86 consecutive patients who received 101 autogenous vein grafts employing this method were retrospectively analyzed. The causes of arterial occlusion were atherosclerosis in 55 patients, Buerger's disease in 23, and other causes in 9. There was one operative death, and 12 late deaths were recorded within a follow-up period extending to 12 years. Of four early occlusions and two stenoses, three were successfully revised within 30 days of surgery. A total of 11 revision operations were required for 10 grafts during the follow-up period, and late graft closure occurred in 9 bypasses. The primary, primary revised, and secondary patency rates at 5 years for the entire series (n=101) were 65%, 85%, and 86%, respectively, with 42 bypasses to the tibial or peroneal artery having 84% primary revised and 86% secondary patency rates. These findings led us to conclude that minimization of the surgical injury at the distal anastomosis contributed to the long-term patency of the distal bypass.
    Materialart: Digitale Medien
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  • 7
    ISSN: 1436-2813
    Schlagwort(e): Key Words: aortogastric fistula ; esophagectomy ; esophageal cancer ; aortoenteric fistula ; endovascular graft
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Springer
    Journal of hepato-biliary-pancreatic surgery 3 (1996), S. 12-16 
    ISSN: 1436-0691
    Schlagwort(e): obstructive jaundice ; cholangitis ; bilirubin decrease rate ; “b”
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract In 1978 and 1979 we reported a formula for serum bilirubin decrease after biliary drainage in 62 patients with obstructive jaundice1,2 The bilirubin decrease rate “b” was determined as Y=aebx, where the b value severed as a marker of the severity of the disease and the prognosis of these patients. In the present study, we examined 576 patients with obstructive jaundice, including 33 patients with acute renal failure due to obstructive cholangitis, using this b value. The patients with cholangitis showed a slow reduction pattern, and belonged to the worse b value groups. However, many patients with acute renal failure whose underlying disorder was incarcerated gallstone in the papilla were in the group with a good bilirubin decrease and had no ductal cell degeneration in the liver; then had a good prognosis after satisfactory biliary drainage and organ support. These findings suggest that ductal cell degeneration in the liver is closely related to a better b value. Therefore, a better b value can be expected after biliary drainage in patients with acute obstructive jaundice due to incarcerated stone in the common bile duct, even if there is associated renal failure, since ductal cell degeneration in the liver is not usually noted in these patients.
    Materialart: Digitale Medien
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  • 9
    ISSN: 1436-2813
    Schlagwort(e): human dura mater allograft ; abdominal wall defect ; wound infection
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract A case report of an infected full-thickness abdominal wall defect treated successfully with a human dura mater allograft is presented. A review of the literature and a discussion of prosthetic abdominal wall repair is also included. A 46-year-old woman presented with multiple small bowel perforations and a large abdominal wall defect due to a motor vehicle collision. A gamma-irradiated human dura mater prosthesis was used to repair the large abdominal wall defect which had been infected by a jejunal fistula. After more than 4 years of follow-up, the patient is free of complications, including wound infection, herniation, and ileus. The human dura mater allograft is thus considered to be a useful prosthesis for repairing potentially infected wounds.
    Materialart: Digitale Medien
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  • 10
    ISSN: 1436-2813
    Schlagwort(e): anastomotic aneurysm ; descending thoracic aortic aneurysm ; temporary bypass method
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The surgical treatment of descending thoracic aortic anastomotic aneurysms is technically challenging. The purpose of this study was to evaluate the use of a temporary external bypass method as an intraoperative measure in the surgical treatment of anastomotic aneurysms of the descending thoracic aorta. An analysis of five consecutive patients who had undergone surgery for a collective seven descending thoracic aortic anastomotic aneurysms in our university hospital over a period of 14 years was conducted. A temporary bypass technique was used as an intraoperative measure in all the operations, four of which were performed with a right axillary to left external iliac artery bypass, while other sites were used in the remaining three. Systemic heparinization was able to be avoided in six operations and was markedly reduced in the remaining one. Although the major postoperative complication was coagulated hemothorax after six procedures, all patients recovered well and are still alive after a mean follow-up period of 8.2±1.5 (SEM) years. The results of this analysis led us to conclude that our temporary bypass method for treating descending thoracic aortic anastomotic aneurysm prevented the risks of anticoagulant administration for circulatory support, which contributed to the success of the operation. This method can be used as adjunct treatment for anastomotic aneurysms in the descending thoracic aorta.
    Materialart: Digitale Medien
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