Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
181 words
A stent delivery catheter system for placing a radioactive stent within a stenosis of a vessel in a human body, the system comprising: a flexible guide wire; a stent delivery catheter; the stent delivery catheter having a distal portion; the stent delivery catheter having an angioplasty balloon adapted for inflation by injectable inflation fluid, the balloon being located at the distal portion of the stent delivery catheter and having a proximal and a distal end; the stent delivery catheter having a radioactive stent mounted co-axially around the angioplasty balloon; the radioactive stent having a proximal end and a distal end; the stent delivery catheter also having a proximal radioactive band and a distal radioactive band; the proximal and distal radioactive bands being generally thin walled and cylindrical; the proximal radioactive band having a distal end located in proximity to the proximal end of the radioactive stent; the distal radioactive band having a proximal end located in proximity to the distal end of the radioactive stent; the proximal and distal radioactive bands adapted to be moved in apposition to the vessel wall.
Claim 2
Dependent Claim
181 words
A stent delivery catheter system for placing a radioactive stent within a stenosis of a vessel in a human body, the system comprising: a flexible guide wire; a stent delivery catheter; the stent delivery catheter having a distal portion; the stent delivery catheter having an angioplasty balloon adapted for inflation by injectable inflation fluid, the balloon being located at the distal portion of the stent delivery catheter and having a proximal and a distal end; the stent delivery catheter having a radioactive stent mounted co-axially around the angioplasty balloon; the radioactive stent having a proximal end and a distal end; the stent delivery catheter also having a proximal radioactive band and a distal radioactive band; the proximal and distal radioactive bands being generally thin walled and cylindrical; the proximal radioactive band having a distal end located in proximity to the proximal end of the radioactive stent; the distal radioactive band having a proximal end located in proximity to the distal end of the radioactive stent; the proximal and distal radioactive bands adapted to be moved in apposition to the vessel wall.
Claim 3
Dependent Claim
18 words
The system of claim 1 wherein the proximal and distal radioactive bands include a beta particle emitting radioisotope.
Claim 4
Dependent Claim
13 words
The system of claim 2 wherein the beta particle emitting isotope is phosphorous-32.
Claim 5
Dependent Claim
13 words
The system of claim 2 wherein the beta particle emitting isotope is yttrium-90.
Claim 6
Dependent Claim
18 words
The system of claim 1 wherein the proximal and distal radioactive bands include a gamma ray emitting radioisotope.
Claim 7
Dependent Claim
17 words
The system of claim 1 wherein the proximal and distal radioactive bands include an x-ray emitting radioisotope.
Claim 8
Dependent Claim
25 words
The system of claim 1 wherein the proximal and distal radioactive bands each have a radioactive activity level that lies between 1 and 100 milliCuries.
Claim 9
Dependent Claim
63 words
The system of claim 1 wherein the balloon angioplasty catheter has an inner shaft for the passage of the flexible guide wire; and located in the distal portion of the balloon angioplasty catheter a radiopaque marker band is located co-axially over the inner shaft and co-axially under the radioactive stent and is centered between the proximal and distal ends of the radioactive stent.
Claim 10
Dependent Claim
14 words
The system of claim 1 wherein the proximal and distal radioactive bands are radiopaque.
Claim 11
Dependent Claim
47 words
The system of claim 1 wherein the proximal radioactive band is adhesively joined to the proximal section of the angioplasty balloon along a narrow longitudinal line and the distal radioactive band is adhesively joined to the distal section of the angioplasty balloon along a narrow longitudinal line.
Claim 12
Dependent Claim
37 words
The system of claim 1 wherein the stent delivery catheter includes a guide wire lumen and an oxygenation guide wire is placed through the guide wire lumen to perfuse the tissue located distally to the angioplasty balloon.