Liquid jet surgical instruments incorporating channel...

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/3203 (2006.01)

Patent

CA 2495911

Certain embodiments of the present invention provide a series of surgical instruments utilizing liquid jets for cutting, ablating, debriding, washing, etc., tissues and/or other materials from the interior and/or external surface of the body of a patient. Certain embodiments of the liquid jet surgical instruments provided according to the invention utilize a channel positioned adjacent to and downstream of a liquid jet-forming nozzle such that at least a portion of the liquid jet passes at least one of within the channel and adjacent to and along the length of at least a portion of a longitudinally- oriented opening in the channel, when the instrument is in operation. The use of such channels in certain embodiments of the inventive liquid jet surgical instruments can enable the instruments to provide enhanced control over the depth and degree of cutting and/or ablation of tissue; and/or can provide improved and enhanced functionality for cleaning, debriding, and/or trimming and cutting a tissue surface; and/or can provide longer effective liquid jet beam cutting/ablation lengths by reducing the degree of dispersion of the jet along its length, especially for instruments utilized in a surrounding gaseous environment.

Dans certains modes de réalisation, l'invention concerne une série d'instruments chirurgicaux utilisant des jets de liquide afin de découper, de pratiquer l'ablation, de débrider, de laver, etc., des tissus et/ou d'autres matériaux à l'intérieur et/ou sur la surface extérieure du corps d'un patient. Dans certains modes de réalisation, les instruments chirurgicaux à jet de liquide utilisent un canal adjacent à une buse formant un jet de liquide ou placé en aval de celle-ci, de sorte qu'au moins une partie de jet de liquide passe adjacente dans le canal et le long d'au moins une partie d'une ouverture orientée longitudinalement dans ledit canal lorsque l'instrument fonctionne. L'utilisation de ces canaux permet aux instruments d'effectuer un contrôle amélioré de la profondeur et du degré de découpe et/ou d'ablation tissulaire; et/ou de fournir une fonctionnalité améliorée de nettoyage, de débridage, et/ou de coupe et de découpe d'une surface tissulaire; et/ou de fournir des longueurs plus efficaces de découpe et/ou d'ablation au moyen d'un faisceau de jets de liquide par réduction du degré de dispersion dudit jet, notamment pour des instruments utilisés dans un environnement gazeux.

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