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- W2048045803 abstract "Stent implantation is increasingly frequent during percutaneous transluminal coronary angioplasty (PTCA), and the catheters used in this procedure are now often crimped industrially rather than manually. This study compared the effects of both types of crimping on balloon surfaces after deployment. Three groups of catheters were collected and studied after PTCA procedures: a control group (n = 30) used during PTCA without stenting (Pronto Rely™, and Viva™); a manual crimping group (n = 30; Pronto Rely™/Palmaz Schatz™, Viva™/Nir™); and an industrial crimping group (n = 50; Power Grip™/Palmaz Schatz™, Multi Link™/Multi Link™, LTX™/GFX2™). Balloon surfaces were observed by scanning electron microscopy (SEM), and burst pressures were measured using an inflator. SEM observations indicated that all balloons with stents had surface alteration streaks and removal of material) not observed in the control group. The damage involved less than 5% of balloon area in the industrial crimping group and more than 20% in the manual crimping group. No differences were observed among the three groups for burst pressures. These results suggest that catheter crimping is more reliable when produced industrially than manually. Moreover, SEM observations indicated that it is inadvisable to try to move an industrial fixed stent before use. L'implantation d'une endoprothèse coronaire est de plus en plus fréquene au cours d'une angioplastie transluminale percutanée (ACTP). L'évolution des dispositifs médicaux a privilégié le sertissage industriel au sertissage manuel. Cette étude se propose de comparer les effets de deux types sertissage sur la surface de ballonnets après largage. Trois groupes de cathéters ont été constitués et étudiés après la procédure de ACTP: un groupe contrôle (n = 30) cathéters utilisés pour une angioplastie sans endoprothèse (Pronto Rely™, et Viva™); un groupe avec sertissage manuel de l'endoproothèse (n = 30; Power Grip™/Palmaz Schatz™, Viva™/Nir™); et un groupe avec un sertissage industriel (n = 50; Power Grip™/Palmaz Schatz™, Multi Link™), LTX™/GFX 2™). Les surfaces des ballonnets ont été observées au microscope electronique à balayage (MEB) et les pressions d'éclatement ont été mesurées à l'aide d'un manomètre. Les observations au MEB indiquent que la surface de tous les ballonnets ayant largué une endoprothèse est altérée, ce qui n'est pas observé dans le groupe contrôle. Les traumatismes recouvrent moins de 5% de la surface des ballonnets du groupe sertissage industriel et plus de 20% de leur surface dan le groupe sertissage manuel. En revanche aucune différence de pression d'éclatement a été observée. Ces résultats suggèrent que le sertissage industriel est moins traumatisant que le sertissage manuel. Dans tous les cas, les observations au MEB indiquent qu'il est fortement déconseillé d'effecteur un essai de mobilisation sur une endoprothèse sertie manuellement." @default.
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- W2048045803 date "2002-12-01" @default.
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- W2048045803 title "Balloon surface changes after stent deployment: Influence of the crimping technique" @default.
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- W2048045803 doi "https://doi.org/10.1016/s1297-9562(02)90005-7" @default.
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