Dilation system and method of using the same

A - Human Necessities – 61 – B

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A61B 17/34 (2006.01)

Patent

CA 2701504

Directional sequential and blunt stimulating dilation systems (10) and related methods for accessing a patient's spine (2) through the patient 's psoas muscle (4) include sequential directional dilators (30, 40) or a blunt stimulating dilator (100, 100') with at least one channel formed therein. Neural elements or nerves (9) of the psoas muscle are preferably mapped using a stimulating probe (20) thereby defining a safe zone of passage to the patient's spine. The stimulating probe is inserted through the psoas muscle toward the patient's spine. The directional sequential dilators may be inserted to dilate the tissue on any side of the stimulating probe without significantly impacting tissue on the opposite side of the stimulating probe, which may be located, proximate the neural elements. The dilators are rendered directional by having bores (35, 45), by means of which they can be inserted over each other and over the probe, which are offset from their longitudinal axes (31, 41).

L'invention concerne des systèmes de dilatation directionnels séquentiels et stimulants émoussés (10) et des procédés correspondants pour accéder à la colonne vertébrale (2) d'un patient par le muscle psoas (4) du patient, qui comprennent des dilatateurs directionnels séquentiels (30, 40) ou un dilatateur stimulant émoussé (100, 100') dans lesquels est formé au moins un canal. Les éléments neuraux ou les nerfs (9) du muscle psoas sont de préférence cartographiés en utilisant une sonde stimulante (20), ce qui permet de définir une zone de passage sûre vers la colonne vertébrale du patient. La sonde stimulante est insérée à travers le muscle psoas vers la colonne vertébrale du patient. Les dilatateurs directionnels séquentiels peuvent être insérés pour dilater le tissu d'un côté quelconque de la sonde stimulante sans effet significatif sur le côté opposé de la sonde stimulante, qui peut être située à proximité des éléments neuraux. Les dilatateurs sont rendus directionnels par des alésages (35, 34), grâce auxquels ils peuvent être insérés les uns par-dessus les autres et par-dessus la sonde, et qui sont décalés par rapport à leurs axes longitudinaux (31, 41).

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