Medical appliance with centering balloon
First Claim
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1. A balloon catheter system for treatment of a portion of a blood vessel by ionizing radiation, comprising:
- an elongate radiation device having a distally disposed ionizing radiation emitter;
a catheter shaft having a radiation device lumen sized to receive the elongate radiation device therein, the radiation device lumen extending from a proximal end of the shaft to a distal end of the shaft; and
a balloon disposed about a distal portion of the shaft, the balloon having at least three lobes such that the catheter is substantially centered in the blood vessel, despite curvature thereof.
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Abstract
The balloon catheter comprises a catheter tube surrounded distally by an elongated inflatable balloon. Throughout the catheter tube is a longitudinal lumen for positioning a radioactive radiation emitter within the balloon. The catheter comprises a second lumen for directing inflation fluid into the balloon. Belt means creating a waist are mounted on the balloon to squeeze it down to nearly the diameter of the catheter thereby leaving a small passage for the inflation fluid. The belt means divide the balloon into sections to assure a close center fit of the catheter within the balloon.
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Citations
30 Claims
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1. A balloon catheter system for treatment of a portion of a blood vessel by ionizing radiation, comprising:
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an elongate radiation device having a distally disposed ionizing radiation emitter;
a catheter shaft having a radiation device lumen sized to receive the elongate radiation device therein, the radiation device lumen extending from a proximal end of the shaft to a distal end of the shaft; and
a balloon disposed about a distal portion of the shaft, the balloon having at least three lobes such that the catheter is substantially centered in the blood vessel, despite curvature thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A balloon catheter system for treatment of a portion of a blood vessel by ionizing radiation, comprising:
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an elongate radiation device having a distally disposed ionizing radiation emitter;
a catheter shaft having a radiation device lumen sized to receive the radiation device, the radiation device lumen extending from a proximal end of the shaft to a distal end of the shaft; and
a balloon disposed about a distal portion of the shaft, the balloon having a proximal waist, a distal waist, and at least two intermediate waists such that the shaft is substantially centered in the balloon, despite curvature thereof. - View Dependent Claims (14, 15)
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16. A system for treatment of a portion of a blood vessel by ionizing radiation, comprising:
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an ionizing radiation emitter; and
a balloon catheter, the balloon catheter comprising a shaft having a lumen sized to receive the ionizing radiation emitter and a balloon disposed about a distal portion of the shaft, the balloon having at least three lobes such that the catheter is substantially centered in the blood vessel, despite curvature thereof. - View Dependent Claims (18)
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17. A system for treatment of a portion of a blood vessel by ionizing radiation, comprising:
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an ionizing radiation emitter; and
a balloon catheter, the balloon catheter comprising a shaft having a lumen sized to receive the ionizing radiation emitter and a balloon disposed about a distal portion of the shaft, the balloon having a proximal waist, a distal waist, and at least two intermediate waists such that the shaft is substantially centered in the balloon, despite curvature thereof. - View Dependent Claims (19)
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20. A method for treatment of a portion of a blood vessel by ionizing radiation, comprising the steps of:
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providing an ionizing radiation emitter;
providing a balloon catheter, the balloon catheter comprising a shaft having a lumen sized to receive the ionizing radiation emitter and a balloon disposed about a distal portion of the shaft, the balloon having at least three lobes;
inserting the balloon catheter into the blood vessel;
inflating the balloon such that the catheter is substantially centered in the blood vessel, despite curvature thereof and inserting the ionizing radiation emitter into the lumen of the catheter for treatment of the blood vessel.
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21. A method for treatment of a portion of a blood vessel by ionizing radiation, comprising the steps of:
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providing an ionizing radiation emitter;
providing a balloon catheter, the balloon catheter comprising a shaft having a lumen sized to receive the ionizing radiation emitter and a balloon disposed about a distal portion of the shaft, the balloon having a proximal waist, a distal waist, and at least two intermediate waists such that the shaft is substantially centered in the balloon;
inserting the balloon catheter into the blood vessel;
inflating the balloon such that the catheter is substantially centered in the blood vessel, despite curvature thereof; and
inserting the ionizing radiation emitter into the lumen of the catheter for treatment of the blood vessel.
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22. A centering catheter for intravascular delivery of a radiation source for administering ionizing radiation to a blood vessel, the centering catheter comprising:
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an elongate shaft having a proximal portion, a distal portion and a radiation source lumen extending therebetween, the elongate shaft further having a guidewire lumen and an inflation lumen;
an inflatable balloon disposed on a distal portion of the elongate shaft, wherein the balloon, when viewed in longitudinal cross-section, defines three or more lobes for substantially centering the catheter in the blood vessel despite curvature thereof. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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30. A centering catheter for the administration of ionizing radiation to a blood vessel wall, comprising:
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an elongate shaft having a proximal end, a distal end and a radiation source lumen extending therebetween, the elongate shaft further having a guidewire lumen and an inflation lumen; and
a balloon disposed about the distal end of the elongate shaft, wherein the balloon, when in an inflated state, forms multiple contact points with the vessel wall as viewed from a longitudinal cross-section for substantially centering the catheter in the blood vessel despite curvature thereof.
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Specification