Minimally invasive gene therapy delivery device and method

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/178 (2006.01) A61B 17/00 (2006.01) A61K 48/00 (2006.01) A61M 31/00 (2006.01) A61B 19/00 (2006.01) A61M 25/00 (2006.01)

Patent

CA 2322786

The invention is directed to a device and method for delivering a therapeutic substance (64) to a bodily tissue in a minimally invasive manner. The device includes an elongate flexible tubular member (12) having a proximal end (14) and a distal end (16). A control lever (50) is provided for enabling the distal end (16) of the tubular member (12) to be controllably flexed in a transverse manner for positioning the distal end (16) of the tubular member (12) proximate to the bodily tissue to be treated. A hollow needle (62) is disposed at the distal end (16) of the tubular member (12) for delivering the therapeutic substance (64) into the bodily tissue. A marking device (78) is also included for indicating the location where an injection has been made in the tissue. This enables the surgeon to keep track of the areas in which injections are made so that the therapeutic substance (64) may be evenly distributed over a desired area of treatment. A method for using the device is also disclosed wherein a patient's lung (120) is partially collapsed to enable access to areas of the heart (128). The therapeutic substance (64) may be injected into the patient's myocardium (138) by passing the needle (62) directly through the patient's pericardium (126). The invention is particularly useful for treatment of ischemic heart disease by gene therapy.

L'invention concerne un dispositif et un procédé permettant d'administrer une substance thérapeutique (64) à un tissu corporel, de manière peu invasive. Le dispositif comprend un élément tubulaire (12) souple, allongé possédant une extrémité proximale (14) et une extrémité distale (16). On prévoit un levier de commande (50) qui permet à l'extrémité distale (16) de l'élément tubulaire (12) de fléchir, de manière contrôlée, transversalement, de façon à placer ladite extrémité distale (16) de l'élément tubulaire (12) à proximité du tissu corporel à traiter. On place une aiguille creuse (62) à l'extrémité distale (16) de l'élément tubulaire (12) de manière à administrer la substance thérapeutique (64) dans le tissu corporel. On prévoit également un dispositif de marquage (78) de manière à indiquer l'endroit du tissu où on doit effectuer une injection. Le chirurgien peut ainsi garder une trace des zones dans lesquelles les injections sont effectuées, de sorte que la substance thérapeutique (64) peut être également répartie dans une zone de traitement désirée. L'invention concerne également un procédé permettant d'utiliser le dispositif, le poumon d'un patient étant partiellement collabé (120) de façon à permettre l'accès à des zones cardiaques (128). La substance thérapeutique (64) peut être injectée dans le myocarde d'un patient (138) en faisant passer l'aiguille (62) directement dans le péricarde du patient (126). L'invention est particulièrement utile pour le traitement d'une cardiopathie ischémique par thérapie génique.

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