WRAPPING CAPE SYSTEM FOR RETRIEVAL OF BLOCKING ITEMS IN TUBULAR ENVIRONMENTS
The invention is referred to a wrapping system which displays favorable grasping characteristics in operations requiring the entrapment and removal of blocking items in tubular geometries. What would be helpful for overcoming the limitations of prior art devices, which frequently cause either wedgin...
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Zusammenfassung: | The invention is referred to a wrapping system which displays favorable grasping characteristics in operations requiring the entrapment and removal of blocking items in tubular geometries. What would be helpful for overcoming the limitations of prior art devices, which frequently cause either wedging of the blocking items with the wall of the surrounding tissues, or lead to partial or total fragmentation of the occluding item, is a wrappingdesign. This can be accomplished with the aid of a netted wire (1, 2, 4) based wrapping action which yields a configuration that surrounds the blocking item, such as a thrombus, peripherally, thus capturing its body tangentially and allowing the operator to pull it along the surrounding tube (for instance vein or artery) by utilizing shear forces distributed along the surface of the blocking item in its axial direction. The advantage stems from the fact that the blocking item is not pushed from behind during its withdrawal, but pulled instead; also, since there is no penetration, fragmentation is avoided. In accordance with the invention, the core of the basic design consists of a system comprising a catheter, a spinal wire and a chorda ! wire aligned with it, equipped with a web-like contractible-expandable net and a pulling string, where on deployment of the system it transforms into a conical or conical-and-cylindrical wrapper that envelops and tightens the blocking item allowing for its subsequent retrieval.
La présente invention concerne un système d'enveloppe qui présente des caractéristiques de préhension favorables dans des opérations nécessitant le piégeage et le retrait d'éléments bloquants dans des géométries tubulaires. Ce qui serait utile pour surmonter les limitations des dispositifs de l'art antérieur, qui causent fréquemment le blocage des éléments bloquants avec la paroi des tissus environnants, ou conduisent à une fragmentation partielle ou totale de l'élément d'occlusion, est une conception d'enveloppe. Cela peut être réalisé au moyen d'une action d'enveloppement à base de treillis (1, 2, 4) qui produit une configuration qui entoure l'élément bloquant, tel qu'un thrombus, de façon périphérique, capturant ainsi son corps tangentiellement et permettant à l'opérateur de le tirer le long du tube environnant (par exemple une veine ou une artère) en utilisant des forces de cisaillement réparties le long de la surface de l'élément bloquant dans sa direction axiale. L'avantage est lié au fait que l'élément blo |
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