Method of manufacturing a cutter for atherectomy device
First Claim
1. A method for manufacturing an atherectomy cutter which comprises the steps of:
- boring into a cylindrical-shaped rod substantially along its longitudinal axis to form an interior which successively and connectingly includes a cylindrical hollow of relatively large diameter, a narrowingly tapered conical intermediate hollow and a cylindrical hollow of relatively small diameter;
turning the rod to configure an outer surface with the interior to establish a blank of uniform thickness; and
burning a hole into the intermediate hollow of the blank to form a blade for the cutter.
5 Assignments
0 Petitions
Accused Products
Abstract
A cutter penetrates at its forward end into, and excises, obstructive tissue in a lumen in a living being by providing two spaced external segments of a conical generally hollow portion with cutting surfaces at their edges. The cutter may have a forward portion of restricted dimensions to facilitate the penetration of the cutter into the obstructive tissue. A progressively expanding portion such as a truncated cone extends rearwardly from the portion of restricted dimensions. In this way, the cutter expands the area of excision of the obstructive tissue from the lumen wall at progressive positions rearwardly from the forward end. The obstructive tissue in the lumen at the progressively expanding positions may be excised at the positions of penetration of the obstructive tissue by rotating the cutter manually or by a motor. The cutter may then be moved forwardly to penetrate the obstructive tissue through an additional distance in the lumen. The cutter may also have a hollow portion of substantially constant dimensions, such as a hollow cylinder, at the laterally expanded end. This hollow cylinder is coupled to a torque tube which has strong and resilient properties to follow the contour of the lumen and to communicate a penetrating force to the forward end of the cutter and a torque to the cutter to rotate the cutter. A vacuum may be applied to the cutter through the torque tube to remove fragments of obstructive tissue excised from the lumen.
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Citations
14 Claims
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1. A method for manufacturing an atherectomy cutter which comprises the steps of:
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boring into a cylindrical-shaped rod substantially along its longitudinal axis to form an interior which successively and connectingly includes a cylindrical hollow of relatively large diameter, a narrowingly tapered conical intermediate hollow and a cylindrical hollow of relatively small diameter; turning the rod to configure an outer surface with the interior to establish a blank of uniform thickness; and burning a hole into the intermediate hollow of the blank to form a blade for the cutter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for producing a cutter for removing obstructive tissue from a lumen of a living being, including the steps of:
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providing a member having a first cylindrical portion, an intermediate portion extending from the cylindrical portion and having a truncated conical configuration and a second substantially cylindrical portion at the truncated end of the intermediate portion and with substantially the same external diameter as the truncated end of the truncated intermediate portion; forming an opening in the intermediate portion to define at least one peripheral blade with cutting edges at the opposite lateral extremities of the blade; and cutting the first cylindrical portion in a direction to communicate with the opening in the intermediate portion. - View Dependent Claims (11, 12, 13, 14)
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Specification