초록 ▼

A catheter-based deployment system for deploying cellular material (22) into the heart muscle (25). The deployment system includes a guiding catheter (19) and a needle assembly (31) capable of sliding within the guiding catheter. The needle assembly (31) terminates in a tip (34) having at least one

A catheter-based deployment system for deploying cellular material (22) into the heart muscle (25). The deployment system includes a guiding catheter (19) and a needle assembly (31) capable of sliding within the guiding catheter. The needle assembly (31) terminates in a tip (34) having at least one side with an opening (43) in communication with a lumen (20) disposed within the needle assembly (31). Once the guiding catheter (19) is positioned, the needle assembly (31) is advanced until the tip (34) penetrates the muscle wall (25). At a predetermined depth the cellular material (22) may be deployed into the muscle wall (25) via a push rod (46) disposed through the lumen of the needle assembly (31).

대표청구항 ▼

1. A deployment system for a myocardial cellular material, comprising: a guiding catheter having at least one lumen defined therein and wherein a distal portion of the guiding catheter is deflectable;a needle assembly capable of sliding through the lumen of the guiding catheter, the needle assembly

1. A deployment system for a myocardial cellular material, comprising: a guiding catheter having at least one lumen defined therein and wherein a distal portion of the guiding catheter is deflectable;a needle assembly capable of sliding through the lumen of the guiding catheter, the needle assembly having a lumen defined therein and terminating in a tip, the tip having at least one side which is proximal to a distal end of the tip, the needle assembly having an opening in the at least one side of the tip disposed in communication with the lumen of the needle assembly so that the myocardial cellular material can be deployed into a myocardial wall from inside the lumen of the needle assembly, wherein the opening is proximal to the tip;a push wire capable of sliding through the lumen of the needle and having a length such that a platform at a distal end of the push wire may be advanced through and beyond the opening in the tip of the needle;an anchor wire disposed axially through the tip and capable of engaging with a portion of the myocardial wall to position the needle assembly relative to the myocardial wall,wherein the guiding catheter has an outer wall having a distal end, wherein the distal end forms an anchor or a hook extending frontwardly, such that the anchor or the hook penetrates into the myocardial wall at a distal end of the anchor or a distal end of the hook and holds the guiding catheter in a position against the myocardial wall; and wherein the myocardial cellular material comprises stem cells. 2. The deployment system as in claim 1, wherein the stem cells are disposed in the lumen of the needle assembly and wherein the stem cells are differentiated to become cardiomyocyte-like. 3. The deployment system as in claim 2, wherein the stem cells have been transformed with a gene encoding nitric oxide synthase. 4. The deployment system as in claim 3, wherein the myocardial cellular material comprises vascular endothelium growth factors. 5. The deployment system as in claim 1, wherein the tip comprises an external screw-type thread. 6. A deployment system for a myocardial cellular material, comprising: a guiding catheter having at least one lumen defined therein and wherein a distal portion of the guiding catheter is deflectable;a needle assembly capable of sliding through the lumen of the guiding catheter, the needle assembly having a lumen defined therein and terminating in a tip, the tip having at least one side which is proximal to a distal end of the tip, the needle assembly having an opening in the at least one side of the tip disposed in communication with the lumen of the needle assembly, wherein the opening is proximal to the tip;a push wire capable of sliding through the lumen of the needle and having a length such that a platform at a distal end of the push wire may be advanced through and beyond the opening in the tip of the needle;an anchor wire disposed axially through the tip and capable of engaging with a portion of a myocardial wall to position the needle assembly relative to the myocardial wall,wherein the guiding catheter has an outer wall having a distal end, wherein the distal end forms an anchor or a hook extending frontwardly, such that the anchor or the hook penetrates into the myocardial wall at a distal end of the anchor or a distal end of the hook and holds the guiding catheter in a position against the myocardial wall; andwherein the myocardial cellular material comprises cells and at least one growth factor. 7. The deployment system as in claim 6, wherein the cells comprise at least one of skeletal muscle cells and fetal endothelial cells, and wherein the cells are disposed in the lumen of the needle assembly. 8. The deployment system as in claim 7, wherein the myocardial cellular material comprises growth factors. 9. The deployment system as in claim 6, wherein the tip comprises an external screw-type thread.