caa a22 4500 397495811 CHVBK 20180308164520.0 cr unu---uuuuu 161202e199507 xx s 000 0 eng 10.1016/S1010-7940(05)80169-1 doi (NATIONALLICENCE)oxford-10.1016/S1010-7940(05)80169-1 Radiographic assessment of structural defects in Bjork-Shiley convexo-concave prostheses [Elektronische Daten] Following the implantation of Bjork Shiley 60 degrees convexo-concave(BS-CC) prostheses, outlet strut fracture rates up to 2.5% per year havebeen reported. According to experimental results and clinical observations,single leg separations are regarded as the primary mechanisms leading tocomplete outlet strut fracture after a certain interval. In an experimentalstudy the question was addressed, whether single leg separation can beidentified by especially developed radiographic means, before outlet strutfracture occurs. Five BS-CC mitral prostheses (29-31 mm) with intentionallymade single leg separations of defined gas sizes (0-75 microns) and oneintact mitral prostheses were implanted in sheep in a double-blind studydesign. Repeat non-invasive investigations were then performed applying arecently developed fluoroscopy imaging technique with direct radiographicmagnification (DIMA COR C22). Single leg separations with gap sizes of morethan 25 microns were properly detected using DIMA COR C22. Separations 25microns or less could not be detected with certainty but were evaluated asprobable or possible as a result of multiple investigations. The intactprosthesis was correctly identified, but was investigated on only oneoccasion. Non-invasive control of Bjork-Shiley CC mitral prosthesesapplying especially developed direct radiographic magnification may allowfor a reliable assessment of single leg separation with gap sizes of morethan 25 microns in sheep. Using this technique of non-invasive serialinvestigations on particular patients with high probability of outlet strutfracture appears feasible, anticipating single leg separation detectabilityin humans. This has to be assessed in a second step.(ABSTRACT TRUNCATED AT250 WORDS) European Journal of Cardio-Thoracic Surgery Elsevier Science B.V. 9/7(1995-07), 373-377 1010-7940 9:7<373 1995 9 ejcts https://doi.org/10.1016/S1010-7940(05)80169-1 text/html Onlinezugriff via DOI 1 abstract jats NATIONALLICENCE 856 40 https://doi.org/10.1016/S1010-7940(05)80169-1 text/html Onlinezugriff via DOI NATIONALLICENCE 773 0- European Journal of Cardio-Thoracic Surgery Elsevier Science B.V 9/7(1995-07), 373-377 1010-7940 9:7<373 1995 9 ejcts Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford