Intraluminal retrieval catheter
First Claim
1. An intraluminal retrieval apparatus, including:
- an elongate and flexible first catheter having a proximal end region and a distal end region, body insertable to position the distal end region within a body lumen while the proximal end region remains outside of the body;
means defining a retrieval cavity and an inlet passage along the distal end region adapted to admit objects into the retrieval cavity from outside of the first catheter;
a closure means for alternatively closing and opening the inlet passage;
a body lumen isolation structure mounted to the first catheter, including first and second isolating elements spaced apart from one another on opposite sides of the inlet passage, said isolating elements positionable on opposite sides of an object situated within the body lumen to confine the object to a segment of the body lumen between them; and
a retrieval device mounted with respect to the first catheter and adapted to retrieve the object by forming a coupling with said object and conveying the object from outside of the first catheter into the cavity via the inlet passage.
1 Assignment
0 Petitions
Accused Products
Abstract
An intraluminal retrieval device includes an outer catheter insertable by its distal end region into an artery or other body lumen that contains an unwanted object. The catheter supports two spaced apart expandable balloons, and is alignable to position the balloons on opposite sides of the object, whereupon the balloons when inflated secure the catheter and isolate a segment of the artery containing the object. The outer catheter includes at least one window between the balloons. An inner catheter is contained within the outer catheter and is movable relative to the outer catheter to alternatively open and close each window. With the outer catheter fixed in the artery and with the window open, a snare, vacuum or positive irrigation flow is used to retrieve the object by conveying it through the window into a retrieval chamber formed by the outer catheter either alone or in cooperation with the inner catheter. Outer catheters with several windows enable selective alignment of the catheters to choose a window nearest the object, or to choose from among windows of different sizes and shapes for closer correspondence to the object requiring retrieval. A smaller version of the device employs a single catheter with a retrieval opening between two microballoons for intracranial retrieval applications.
-
Citations
30 Claims
-
1. An intraluminal retrieval apparatus, including:
-
an elongate and flexible first catheter having a proximal end region and a distal end region, body insertable to position the distal end region within a body lumen while the proximal end region remains outside of the body; means defining a retrieval cavity and an inlet passage along the distal end region adapted to admit objects into the retrieval cavity from outside of the first catheter; a closure means for alternatively closing and opening the inlet passage; a body lumen isolation structure mounted to the first catheter, including first and second isolating elements spaced apart from one another on opposite sides of the inlet passage, said isolating elements positionable on opposite sides of an object situated within the body lumen to confine the object to a segment of the body lumen between them; and a retrieval device mounted with respect to the first catheter and adapted to retrieve the object by forming a coupling with said object and conveying the object from outside of the first catheter into the cavity via the inlet passage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. An intraluminal retrieval apparatus, including:
-
an elongate and flexible first catheter having a proximal end region and a distal end region, body insertable to position the distal end region within a body lumen while the proximal end region remains outside of the body; means defining a retrieval chamber and an inlet passage along the distal end region adapted to admit objects into the retrieval chamber from outside of the first catheter; a body lumen isolation structure mounted to the first catheter and including first and second isolating elements spaced apart from one another on opposite sides of the inlet passage, said first and second isolating elements further positionable on opposite sides of an object within the body lumen to confine the object to a segment of the body lumen between them; a closure means for alternatively opening the inlet passage to facilitate a flow of fluids into the chamber from outside of the catheter and closing the inlet passage to substantially prevent such flow; and an object retrieval component coupled to the first catheter and adapted to retrieve the object by conveying the object into the chamber via the inlet passage. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
-
-
19. An intraluminal retrieval device, including:
-
an elongate and flexible first catheter having a proximal end region, a distal end region and a first catheter lumen extending from the proximal end region to the distal end region, said first catheter being body insertable to position the distal end region within a body lumen while the proximal end region remains outside of the body; a plurality of first apertures formed through the first catheter and spaced apart from one another along the distal end region; a lumen isolation structure mounted to the first catheter, including first and second isolating elements spaced apart from one another on opposite sides of the first apertures, said isolating elements positionable on opposite sides of an object in the body lumen to confine the object to a segment of the body lumen between them; a second elongate and flexible catheter contained within said first catheter lumen and extending from the proximal end region to the distal end region, said second catheter including a second catheter lumen and a second aperture through the second catheter near a distal end thereof, the second catheter being movable relative to the first catheter to alternatively position the second aperture in alignment with selected different ones of the first apertures to admit a fluid flow from outside of the first catheter into the second catheter lumen via the selected first aperture and second aperture, and further alternatively movable to position the second aperture out of alignment with the first apertures to prevent such fluid flow; and a retrieval component, operable when the second aperture and the selected one of the first apertures are aligned, to retrieve the object by conveying an object from outside of the catheter into the second catheter lumen via the selected first aperture and second aperture. - View Dependent Claims (20, 21, 22, 23, 24)
-
-
25. A process for retrieving an object from a body lumen, including:
-
bodily inserting an elongate and flexible catheter to selectively position a distal end of the catheter within a body lumen such that first and second isolating elements mounted on the catheter are on opposite sides of an object in the body lumen; activating the isolating elements to positionally fix the catheter within the body lumen and confine the object to a segment of the body lumen between the isolating elements; with the catheter fixed, opening an inlet passage along the catheter between the isolating elements, then retrieving the object by conveying the object through the inlet passage to a retrieval cavity in the catheter; and closing the inlet passage to retain the retrieved object in the retrieval cavity. - View Dependent Claims (26, 27, 28, 29, 30)
-
Specification