Perfusion catheter
First Claim
1. An apparatus for perfusing blood beyond a blockage created in a patient'"'"'s circulatory system during catheterization, comprisingan elongated catheter having a proximal end and a distal end;
- at least one first catheter lumen extending through the distal end of said catheter;
guide means for guiding said catheter in a vessel, said guide means surrounding at least a portion of said catheter, creating an annular passage therebetween;
valve means on said catheter between said proximal and said distal ends thereof for selectively closing said annular passage;
said first catheter lumen having flow communication with said annular passage at a point proximal to said valve means;
sheath means coaxially surrounding and extending along said guide means for at least a portion of the length of said guide means to a distal end proximally of said valve means;
a first sheath means lumen extending through the sheath means to an opening at the distal end of said sheath means, said first sheath means lumen having flow communication with said annular passage adjacent a proximal end of said sheath means; and
pump means including a fluid inlet in fluid communication with said first sheath lumen adjacent a proximal end thereof and further including a fluid outlet in fluid communication with said annular passage, for drawing a patient'"'"'s blood through said distal opening of said sheath lumen during catheterization and, upon selective energization of said valve means, for pumping said drawn blood through said annular passage into said catheter lumen and out said distal end of said catheter lumen to the vascular anatomy of the patient distal to said blockage.
3 Assignments
0 Petitions
Accused Products
Abstract
A low-profile angioplasty catheter is disclosed which is insertable through a guiding catheter. The angioplasty catheter has two balloons. The distal balloon dilates the stenosis. The proximal balloon is separately inflatable and selectively closes the annular passage between the angioplasty catheter and the guiding catheter. The angioplasty catheter has a central lumen with a series of openings allowing fluid communication from the central lumen into the annular passage proximally of the balloon which seals the annular passage. While the first balloon is inflated to dilate the stenosis, blood can be withdrawn from an arterial source through a lumen (or plurality thereof) in the guiding catheter and pumped into the annular passage between the angioplasty catheter and the guiding catheter. The blood then passes through the openings proximal to the proximal balloon into the central lumen of the PTCA catheter and flows beyond the distal tip of the angioplasty catheter to maintain circulation of the patient'"'"'s blood at a point distal of the stenosis.
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Citations
16 Claims
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1. An apparatus for perfusing blood beyond a blockage created in a patient'"'"'s circulatory system during catheterization, comprising
an elongated catheter having a proximal end and a distal end; -
at least one first catheter lumen extending through the distal end of said catheter; guide means for guiding said catheter in a vessel, said guide means surrounding at least a portion of said catheter, creating an annular passage therebetween; valve means on said catheter between said proximal and said distal ends thereof for selectively closing said annular passage; said first catheter lumen having flow communication with said annular passage at a point proximal to said valve means; sheath means coaxially surrounding and extending along said guide means for at least a portion of the length of said guide means to a distal end proximally of said valve means; a first sheath means lumen extending through the sheath means to an opening at the distal end of said sheath means, said first sheath means lumen having flow communication with said annular passage adjacent a proximal end of said sheath means; and pump means including a fluid inlet in fluid communication with said first sheath lumen adjacent a proximal end thereof and further including a fluid outlet in fluid communication with said annular passage, for drawing a patient'"'"'s blood through said distal opening of said sheath lumen during catheterization and, upon selective energization of said valve means, for pumping said drawn blood through said annular passage into said catheter lumen and out said distal end of said catheter lumen to the vascular anatomy of the patient distal to said blockage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11)
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10. The apparatus of claim 26, wherein:
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said annular passage has a cross-sectional area at least 10 times greater than said first catheter lumen; and
wherein saidpump means in fluid communication with said annular passage is capable of pumping blood at least 60 cc/min. out the distal end of said first catheter lumen when said catheter is about 140 cm long with a developed pressure at said pump means not exceeding 100 psig. - View Dependent Claims (12)
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13. A method of perfusing blood during balloon angioplasty, comprising:
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inserting a guiding catheter into a patient; inserting a balloon angioplasty catheter through said guiding catheter; inflating a distal balloon on said angioplasty catheter to perform angioplasty; inflating a proximal balloon to seal between said guiding catheter and said angioplasty catheter, closing off an annular passage therebetween; drawing blood from the patient through a channel in a sheath on the guiding catheter; pumping the blood back into said annular passage up to said proximal balloon; and directing the blood into the angioplasty catheter proximally of said proximal balloon to pump it into a lumen extending distally of said inflated second balloon, to the distal vascular anatomy.
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14. An apparatus for perfusing blood beyond a blockage created in a patient'"'"'s circulatory system during catheterization, comprising
an elongated catheter having a proximal end and a distal end; -
at least one catheter lumen extending through the distal end of said catheter; guide means for guiding said catheter in said vessel, said guide means coaxially surrounding at least a portion of said catheter, creating an annular passage therebetween; first balloon means on said catheter between said proximal and said distal ends thereof for selectively closing said annular passage, said guide means extending over said first balloon means; second balloon means disposed on said catheter distally of said guide means for expanding a passageway in a patient'"'"'s circulatory system during catheterization; actuating means for actuating said second balloon means from the proximal end of said catheter, said actuating means including a second lumen in said catheter extending from adjacent its proximal end to said second balloon means; means for selectively energizing said first balloon means from the proximal end of said catheter, said energizing means including a third lumen in the catheter extending from adjacent the proximal end thereof to said first balloon; said first catheter lumen being larger in cross-sectional area than said second or third catheter lumens; sheath means coaxially surrounding and extending along said guide means for at least a portion of the length of said guide means to a distal end proximally of said first balloon means; a first sheath means lumen extending through the sheath means to an opening at the distal end of said sheath means; said catheter lumen having flow communication with said annular passage at a point proximal to said first balloon means; and pump means including a fluid inlet in fluid communication with said first sheath lumen adjacent a proximal end thereof and further including a fluid outlet in fluid communication with said annular passage, for drawing a patient'"'"'s blood through said distal opening of said sheath lumen during catheterization and, upon selective energization of said valve means, for pumping said drawn blood through said annular passage into said catheter lumen and out said distal end of said catheter lumen to the vascular anatomy of the patient distal to said blockage. - View Dependent Claims (15, 16)
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Specification