Flow restoration systems and methods for use
First Claim
1. A method for removing obstructive material from a body lumen, the method comprising:
- introducing a distal end of an elongate tubular member into the body lumen;
introducing an elongate treatment member comprising a distal balloon in a contracted condition through a lumen of the elongate tubular member and into the body lumen such that the balloon is positioned distal to the obstructive material;
introducing a macerator device comprising an elongate shaft carrying an expandable cage in a collapsed configuration through the lumen of the elongate tubular member into the body lumen such that the cage is positioned proximal to the obstructive material;
expanding the cage within the body lumen to an expanded configuration such that the cage defines an open end;
inflating the balloon;
proximally withdrawing the inflated balloon towards the expanded cage such that the obstructive material is captured within the cage through the open end;
collapsing the cage radially inwardly towards the collapsed configuration to allow the cage to be removed from the body lumen; and
collapsing, after the cage capturing the obstructive material is collapsed, the balloon to allow the balloon to be removed from the body lumen.
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Accused Products
Abstract
Apparatus and methods are provided for removing obstructive material within a body lumen. The apparatus includes a macerator device deployable from a sheath that includes an expandable cage carried by a shaft and within a constraint tube. The shaft is movable relative to the constraint tube for deploying and expanding the cage within a body lumen such that an open end of the cage is oriented towards obstructive material. The cage is advanced to capture the material or the material is directed into the cage using an expandable member expanded beyond the material and retracted to direct the material into the cage. The cage is withdrawn into the constraint tube to compress the cage radially inwardly. Materials extending through apertures in the cage are sheared off by a sharpened edge of the constraint tube. The smaller, sheared off particles are then aspirated from the body lumen through the sheath.
54 Citations
18 Claims
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1. A method for removing obstructive material from a body lumen, the method comprising:
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introducing a distal end of an elongate tubular member into the body lumen; introducing an elongate treatment member comprising a distal balloon in a contracted condition through a lumen of the elongate tubular member and into the body lumen such that the balloon is positioned distal to the obstructive material; introducing a macerator device comprising an elongate shaft carrying an expandable cage in a collapsed configuration through the lumen of the elongate tubular member into the body lumen such that the cage is positioned proximal to the obstructive material; expanding the cage within the body lumen to an expanded configuration such that the cage defines an open end; inflating the balloon; proximally withdrawing the inflated balloon towards the expanded cage such that the obstructive material is captured within the cage through the open end; collapsing the cage radially inwardly towards the collapsed configuration to allow the cage to be removed from the body lumen; and collapsing, after the cage capturing the obstructive material is collapsed, the balloon to allow the balloon to be removed from the body lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for removing obstructive material from a body lumen, the method comprising:
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introducing a distal end of a tubular member into the body lumen, the tubular member comprising a lumen extending proximally from the distal end; introducing a balloon in a contracted condition from the tubular member into the body lumen to a location distal of the obstructive material within the body lumen; introducing a distal end of a macerator device carrying an expandable cage in a collapsed configuration into the body lumen to a location proximal of the obstructive material from the tubular member; expanding the cage to an expanded configuration within the body lumen such that an open end of the cage is oriented towards the obstructive material; inflating the balloon to an enlarged condition within the body lumen distal of the obstructive material; manipulating the balloon towards the cage, thereby directing the obstructive material into the open end of the cage; retracting the cage after directing the obstructive material into the open end of the cage; and collapsing, after the cage capturing the obstructive material is collapsed, the balloon to allow the balloon to be removed from the body lumen. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method for removing obstructive material from a body lumen, the method comprising:
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introducing a macerator device through a constraint tube into the body lumen, the macerator device comprising an elongate shaft carrying an expandable cage in a collapsed configuration; expanding the cage within the body lumen to an expanded configuration such that the cage defines an open end; advancing the expanded cage towards the obstructive material and rotating the cage during advancement until the obstructive material becomes entangled in a distal portion of the cage; continuing rotation of the cage until the obstructive material is detached from the body lumen; withdrawing the cage into the constraint tube, thereby releasing the obstructive material from the cage; redeploying and expanding the cage; directing the released obstructive material into the expanded cage through the open end using an embolectomy device; and collapsing the cage radially inwardly towards the collapsed configuration to allow the cage to be removed from the body lumen. - View Dependent Claims (18)
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Specification