Device and method for removing material from a hollow anatomical structure
Inventors
Cartier, William A. • HAMILTON, JR., WILLIAM C. • Mitchell, James J. • Lagoe, Daniel T.
Assignees
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Publication Number
US-12178467-B2
Publication Date
2024-12-31
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. Alternatively, the device may include a rotating wire attached to the macerator element. 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. The device may be used in combination with a distal occlusion element, which may be either a radially expandable filter or balloon member.
Core Innovation
The invention relates to a device and system for removing undesirable material from a body, including undesirable material from a vessel wall. The device includes an elongate shaft comprising an outer shaft and an inner shaft, and an expandable structure coupled to the outer shaft and inner shaft. The expandable structure is defined by a plurality of wires interconnecting at interconnection locations and transitions from a collapsed configuration having a first outer diameter to an expanded configuration having a second outer diameter larger than the first outer diameter.
The expandable wire structure includes a proximal wire section and a distal wire section, where the number of interconnection locations of the distal wire section is greater than the number of interconnection locations of the proximal wire section. A first collar coupled to the expandable structure and the inner shaft is positioned distal of a second collar coupled to the outer shaft. In the expanded and deployed configuration, the first collar is positioned within the proximal wire section of the expandable structure.
In system embodiments, a sheath is provided with a retriever device configured to be inserted into the sheath. The retriever device is configured to mechanically disrupt the undesirable material from the vessel wall upon application of a force to the retriever device. The retriever device further includes a mechanical disruption function implemented with an expandable, deployable wire structure, and in at least one embodiment the retriever device is rotatable to engage the undesirable material.
Claims Coverage
The provided independent claims are clm-00001, clm-00010, and clm-00018. Across these independent claims, the coverage focuses on a wire-based expandable structure on an elongate outer/inner shaft with collar positioning and configuration-dependent behavior, and it extends to system-level arrangements including a sheath and, in one independent claim, rotational engagement and deployment by longitudinal force.
Wire-based expandable structure on outer and inner shaft
A device comprising an elongate shaft comprising an outer shaft and an inner shaft, and an expandable structure coupled to the outer shaft and inner shaft, the expandable structure defined by a plurality of wires interconnecting at interconnection locations, the expandable structure configured to transition from a collapsed configuration having a first outer diameter to an expanded configuration having a second outer diameter larger than the first outer diameter.
Distal wire section with greater interconnection locations
The plurality of wires includes a proximal wire section and a distal wire section, wherein a number of interconnection locations of the distal wire section is greater than a number of interconnection locations of the proximal wire section.
Collar positioning relative to expandable structure
A first collar coupled to the expandable structure and the inner shaft, and a second collar coupled to the outer shaft, wherein the first collar is positioned distal of the second collar and is moveable relative to the second collar, and wherein the first collar is positioned within the proximal wire section of the expandable structure when the expandable structure is in the expanded configuration.
Sheath with insertable retriever configured to disrupt vessel-wall material
A system comprising a sheath; and a retriever device configured to be inserted into the sheath, wherein the retriever device is configured to mechanically disrupt the undesirable material from a vessel wall upon application of a force applied to the retriever device.
Retriever deployment by longitudinal force with deployed configuration expansion
In the deployed configuration, the expandable structure is configured such that application of a longitudinal force to either the outer shaft, the inner shaft, or the outer shaft and the inner shaft causes the expandable structure to expand; and the first collar is positioned distal of the second collar and within the proximal wire section of the expandable structure when the expandable structure is in the deployed configuration.
Rotatable engagement for mechanical disruption
A retriever device configured to be rotated to engage the undesirable material, and mechanically disrupt the undesirable material from the vessel wall upon application of a force applied to the retriever device.
The independent claims collectively cover devices and systems in which a wire-defined expandable structure on an elongate outer/inner shaft transitions between collapsed and expanded/deployed configurations, guided by collar positioning and a distal wire section having a greater number of interconnection locations. System embodiments include a sheath and insertion of the retriever, and at least one independent claim further requires that the retriever device is rotatable to engage undesirable material and is deployable through application of longitudinal force.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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