Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
200 words
A catheter system for forming a passageway through a blockage in a human artery comprising: a centering catheter in the form of an elongated cylinder having proximal and distal ends, the centering catheter being adapted to be percutaneously inserted into an artery and then advanced until its distal end contacts the proximal surface of an arterial blockage; an auger catheter having proximal and distal ends having a self-tapping screw at its distal end and also having a flexible section whose distal end is joined to the screw's proximal end, the auger catheter being adapted to be advanced within the centering catheter until a sharp point at the screw's distal end contacts the proximal surface of the blockage, the outer surface of the screw having a smooth transition from the screw's proximal end onto the flexible section's distal end, the auger catheter also having a handle at its proximal end that lies outside the patient's body, the handle and screw cooperating so that when the handle is pushed forward and rotated in a particular direction, the screw will advance in a forward direction thereby forming a passageway though the blockage by plastically deforming the blockage tissue without any significant tissue removal.
Claim 2
Dependent Claim
200 words
A catheter system for forming a passageway through a blockage in a human artery comprising: a centering catheter in the form of an elongated cylinder having proximal and distal ends, the centering catheter being adapted to be percutaneously inserted into an artery and then advanced until its distal end contacts the proximal surface of an arterial blockage; an auger catheter having proximal and distal ends having a self-tapping screw at its distal end and also having a flexible section whose distal end is joined to the screw's proximal end, the auger catheter being adapted to be advanced within the centering catheter until a sharp point at the screw's distal end contacts the proximal surface of the blockage, the outer surface of the screw having a smooth transition from the screw's proximal end onto the flexible section's distal end, the auger catheter also having a handle at its proximal end that lies outside the patient's body, the handle and screw cooperating so that when the handle is pushed forward and rotated in a particular direction, the screw will advance in a forward direction thereby forming a passageway though the blockage by plastically deforming the blockage tissue without any significant tissue removal.
Claim 3
Dependent Claim
26 words
The catheter system of claim 1 wherein the centering catheter is of a uniform outer diameter throughout its length that lies within the patient's arterial system.
Claim 4
Dependent Claim
26 words
The catheter system of claim 1 wherein the centering catheter has a bulge near its distal end to facilitate centering of the centering catheter's distal end.
Claim 5
Dependent Claim
38 words
The catheter system of claim 3 wherein the bulge collapses inward when pushed within a guiding catheter or sheath and then expands outward after the distal end of the centering catheter extends beyond the guiding catheter or sheath.
Claim 6
Dependent Claim
57 words
The catheter system of claim 1 wherein a distal portion of the centering catheter has a plurality of spokes which are flexibly attached to a distal end ring, the spokes being adapted to bulge outwardly when the centering catheter is pushed in a forward direction after the distal ring has engaged the proximal surface of the blockage.
Claim 7
Dependent Claim
75 words
The catheter system of claim 1 wherein the centering catheter has a first and central lumen which forms a passageway for the auger, and a second lumen which is fluidically isolated from the first lumen, the second lumen allowing fluid communication between the centering catheter's proximal end and an inflatable balloon located near the centering catheter's distal end, the inflatable balloon being adapted to center the centering catheter's distal end when the balloon is inflated.
Claim 8
Dependent Claim
19 words
The catheter system of claim 1 wherein the centering catheter has a flat wire helical coil on its interior.
Claim 9
Dependent Claim
32 words
The catheter system of claim 1 wherein the centering catheter has a hemostasis valve at its proximal end which makes a fluid seal against the outer cylindrical surface of the auger catheter.
Claim 10
Dependent Claim
39 words
The catheter system of claim 1 wherein the distance that the distal end of the screw extends beyond the distal end of the centering catheter is indicated by marks on the outer surface of the auger catheter's proximal end.