Spiral balloon catheter
First Claim
Patent Images
1. A method for removing particulate matter from a body passage in a patient in need of such treatment, comprising the steps of:
- a) providing a catheter fitted with a compliant balloon and an aspiration element, said balloon having a non-helical shape and surrounding said catheter in a non-spiral manner in its deflated state, wherein said balloon is constructed such that it is capable of adopting a spiral or helical conformation upon inflation based upon an intrinsic ability of the balloon;
b) introducing said catheter into a peripheral blood vessel and advancing same until said balloon is located in the region of the particulate matter to be removed;
c) inflating said balloon such that it adopts the spiral or helical conformation, thereby causing said particulate matter to enter a spiral channel thus formed in the external surface of the balloon, and to become squeezed and elongated between said balloon and said blood vessel wall;
d) aspirating said squeezed particulate matter into said aspiration element, wherein said aspiration may be performed continuously or intermittently;
e) optionally partially or completely deflating the balloon and re-locating the catheter such that said balloon becomes located in another region of particulate matter to be removed, and repeating steps (c) and (d);
f) completely deflating the balloon and withdrawing the catheter from the patient'"'"'s vasculature.
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Abstract
The present invention provides a balloon catheter system comprising one or more conduits to which are attached a compliant balloon having a non-helical shape in its deflated state, wherein said balloon is constructed such that is capable of adopting a spiral or helical conformation upon inflation. In addition, the present invention also provides methods for using said balloon catheter system.
61 Citations
20 Claims
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1. A method for removing particulate matter from a body passage in a patient in need of such treatment, comprising the steps of:
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a) providing a catheter fitted with a compliant balloon and an aspiration element, said balloon having a non-helical shape and surrounding said catheter in a non-spiral manner in its deflated state, wherein said balloon is constructed such that it is capable of adopting a spiral or helical conformation upon inflation based upon an intrinsic ability of the balloon; b) introducing said catheter into a peripheral blood vessel and advancing same until said balloon is located in the region of the particulate matter to be removed; c) inflating said balloon such that it adopts the spiral or helical conformation, thereby causing said particulate matter to enter a spiral channel thus formed in the external surface of the balloon, and to become squeezed and elongated between said balloon and said blood vessel wall; d) aspirating said squeezed particulate matter into said aspiration element, wherein said aspiration may be performed continuously or intermittently; e) optionally partially or completely deflating the balloon and re-locating the catheter such that said balloon becomes located in another region of particulate matter to be removed, and repeating steps (c) and (d); f) completely deflating the balloon and withdrawing the catheter from the patient'"'"'s vasculature. - View Dependent Claims (2, 3)
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4. A method for removing particulate matter from a body passage in a patient in need of such treatment, comprising the steps of:
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a) providing a catheter system comprising one or more conduits to which are attached an inner compliant balloon, the inner balloon being enclosed by an outer non-compliant or semi-compliant balloon, and the inner balloon having a non-helical shape and surrounding said catheter in a non-spiral manner in its deflated state, wherein said inner balloon is constructed such that it is capable of adopting a spiral or helical conformation upon inflation based upon an intrinsic ability of the inner balloon, and wherein the outer balloon of said catheter system is perforated by a first set of pores along most or all of its surface, and is further perforated by a second set of pores or openings at the proximal neck thereof, wherein the pores of said second set are significantly fewer in number and larger in diameter than said first set; b) introducing said catheter into a peripheral blood vessel and advancing same until the balloons are located in the region of the particulate matter to be removed; c) partially inflating the inner balloon to a first expanded state such that the inner balloon adopts a spiral conformation and such that a spiral channel is formed between said spiral balloon and the outer balloon, said channel becoming filled with particulate matter that has entered said spiral channel through said second set of pores; d) further inflating the inner balloon to a second expanded state, such that the proximal coils of the spiral-shaped inner balloon block the second set of pores and reduce the volume of the spiral channel formed in step (c), thereby causing the outward passage of particulate matter of a size smaller than the average diameter of the first set of pores through said pores, but retaining particulate matter of particulate matter of a size larger than said average diameter in the reduced space between the inner and outer balloons; e) partially deflating the inner balloon to the first expanded state described in step (c), such that further particulate matter may be received in the spiral channel; f) repeating steps (d) and (e) as required; and g) completely deflating the inner balloon and withdrawing the catheter from the patient'"'"'s vasculature with the particulate matter trapped between the inner and outer balloons. - View Dependent Claims (5, 6)
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7. A method for removing thrombotic material from a body passage in a patient in need of such treatment, comprising the steps of:
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a) providing a catheter fitted with a compliant balloon, said balloon having a non-helical shape and surrounding said catheter in a non-spiral manner in its deflated state, wherein said balloon is constructed such that it is capable of adopting a spiral or helical conformation upon inflation based upon an intrinsic ability of the balloon; b) introducing said catheter into a peripheral blood vessel and advancing same until said balloon is located in the region of the thrombotic material to be removed; c) inflating said balloon such that it adopts the spiral conformation having a spiral channel winding around the external surface of said balloon, thereby causing said thrombotic material to enter a spiral channel and to become squeezed and elongated between said balloon and said blood vessel wall; d) deflating said balloon, thereby creating a space between the deflated balloon and the squeezed thrombotic material, into which a thrombolytic agent may be introduced, thereby enhancing thrombo-dissolution; e) rapidly repeating steps (c) and (d); and f) completely deflating the balloon and withdrawing the catheter from the patient'"'"'s vasculature. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method for removing a thrombus from a body passage in a patient in need of such treatment, comprising the steps of:
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a) providing a catheter fitted with a compliant balloon, said balloon having a non-helical shape and surrounding said catheter in a non-spiral manner in its deflated state, wherein said balloon is constructed such that it is capable of adopting a spiral or helical conformation upon inflation based upon an intrinsic ability of the balloon; b) introducing said catheter into a peripheral blood vessel and advancing same until said balloon is located in the region of the thrombus to be removed; c) trapping the thrombus within a spiral channel formed by inflation of the balloon; and d) withdrawing the catheter through the vasculature and out of the body, together with said entrapped thrombus. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification