Device and method for removing material from a hollow anatomical structure
Inventors
Assignees
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Publication Number
US-12245788-B2
Publication Date
2025-03-11
Expiration Date
Abstract
A medical device for removing a material from a hollow anatomical structure is provided. The device may include a shaft member. The device may include an expandable centering element near the distal end of the device. The device may include a macerator element either attached to the shaft or independent and freely moveable from the shaft. The device may include an aspiration lumen in for removal of material. The device may include a drive shaft attached to a motor and used to rotate the macerator element.
Core Innovation
The invention provides a system for removing undesirable material from a body within a hollow anatomical lumen using an outer shaft, an intermediate shaft, and an inner shaft. The intermediate shaft is configured to be coaxially inserted within a lumen of the outer shaft and coaxially over the inner shaft, and is uncoupled at a distal end from the outer shaft and the inner shaft. The intermediate shaft is independently translatable and rotatable relative to the outer shaft and the inner shaft.
At the distal end of the intermediate shaft, the system includes a helical macerator member configured to operatively engage the undesirable material within the outer shaft. Upon rotation of the intermediate shaft, the helical macerator member disrupts the undesirable material within the outer shaft. The system further includes an aspiration source operatively fluidly coupled to the lumen of the outer shaft to generate a suction force within the outer shaft to draw disrupted undesirable material into the outer shaft.
The disclosed embodiments further describe aspiration through the outer shaft, maceration disruption at the distal end, and centering/protection features intended to reduce engagement of vessel wall material. An expandable centering element near the distal end is used to center and shield a macerator from vessel wall damage, and the distal macerator assembly is described in forms including an auger helical macerator with aspiration and annular-space maceration, with occlusion/protection embodiments and coordinated sequence of centering deployment and macerator activation.
Claims Coverage
The document includes two independent claims that share a common core architecture: a coaxial multi-shaft system with an independently translatable and rotatable intermediate shaft carrying a distal helical macerator, coupled to an aspiration source that generates suction within the outer shaft to draw disrupted undesirable material into the outer shaft. Across the independent claim set, the main inventive features involve independent shaft control at the distal end, maceration disruption by a helical macerator upon rotation, and suction-based capture via the lumen of the outer shaft.
Coaxial multi-shaft with independent distal translation and rotation
An outer shaft, an intermediate shaft, and an inner shaft, where the intermediate shaft is configured to be coaxially inserted within a lumen of the outer shaft and coaxially over the inner shaft, and wherein the intermediate shaft is uncoupled at a distal end from the outer shaft and the inner shaft, and is independently translatable and rotatable relative to the outer shaft and the inner shaft.
Distal helical macerator engages and disrupts upon rotation
A helical macerator member at the distal end of the intermediate shaft, wherein the helical macerator member is configured to operatively engage the undesirable material within the outer shaft, and wherein the helical macerator member is configured to disrupt the undesirable material within the outer shaft upon rotation of the intermediate shaft.
Aspiration source generates suction to draw disrupted material into outer shaft
An aspiration source configured to be operatively fluidly coupled to the lumen of the outer shaft and generate a suction force within the outer shaft to draw undesirable material into the outer shaft.
Expandable element cover material selected from permeable or non-permeable
An expandable element having a cover made from either a permeable or a non-permeable material.
Reinforcing element including wire member structure
The system includes a reinforcing element that includes at least one wire member.
Overall claim coverage centers on independently controllable coaxial shafts with a distal helical macerator that disrupts undesirable material upon rotation, combined with an aspiration source that generates suction in the outer shaft lumen to draw the disrupted material into the outer shaft. The dependent refinements further specify expandable elements with permeable or non-permeable cover material and reinforcing elements with wire-member structure.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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