Catheter-based apparatuses and methods with filter pouch
Inventors
Zandi, Abdolrahim • Goslau, J. Eric
Assignees
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Publication Number
US-12029635-B2
Publication Date
2024-07-09
Expiration Date
Abstract
As may be implemented in accordance with one or more embodiments characterized herein, aspects of the present disclosure are directed to an apparatus including first and second filters, a shaft and a frame coupled to the shaft and to the first filter. The frame and shaft operate to seal a perimeter of the first filter around an opening in a sidewall of a tubular structure, by pressing the frame against the perimeter and the sidewall. The second filter is also coupled to the frame and operates with the frame to extend into cross section of the tubular structure away from the frame and the sidewall, with the frame sealing the first filter around the opening, and to filter particles from fluid flowing past the opening and along the length of the sidewall.
Core Innovation
The disclosed catheter-based filtering system includes a shaft and a frame coupled to an end of the shaft and to a first filter. The frame seals an entire first perimeter around an opening in a sidewall of a tubular structure extending longitudinally along a length by pressing the frame against the first perimeter and the sidewall.
A second filter is coupled to portions of opposing rails of the frame to which the first perimeter is coupled, while a remaining portion of the second perimeter extends from one opposing rail to the other opposing rail and away from the first filter. The second filter extends into a cross section of the tubular structure away from the frame and the sidewall to form a pouch bound by the second filter and a surface area of the first filter that extends from one opposing rail to the other opposing rail.
With the frame sealing the first filter around the opening, the system is configured to filter particles from a fluid flowing past the opening and along the length of the sidewall. In an aortic arch during transcatheter valve procedures, the system is described as mitigating embolization by reducing eddy currents, vortices, turbulence, and pressure variation at the sealing interface.
Claims Coverage
The document provides two independent claims, each centered on a catheter-based apparatus that combines a sealing frame with a first filter around a sidewall opening and a pouch-type second filter extending into the tubular cross-section to filter particles from fluid flowing past the opening.
Sealing a first perimeter around a sidewall opening with a frame and shaft
A frame coupled to an end of a shaft and to a first filter, where the frame and shaft are configured and arranged to seal the entire first perimeter around an opening in a sidewall of a tubular structure by pressing the frame against the first perimeter and the sidewall.
Pouch-forming second filter extending into the tubular cross section for particle filtration
A second filter having a second perimeter with a first portion coupled to portions of opposing rails of the frame and a remaining portion extending from one opposing rail to the other opposing rail and away from the first filter, configured and arranged with the first filter and the frame so that the second filter extends into a cross section of the tubular structure away from the frame and the sidewall and forms a pouch bound by the second filter and a surface area of the first filter, with the frame sealing the first filter around the opening to filter particles from a fluid flowing past the opening and along the length of the sidewall.
Extension arm applying force to seal filter material around an interior sidewall opening
An extension arm terminating at a distal end connected to a proximal end of the frame, configured with the frame and filter to apply a force to the frame that seals the outer surface of the filter material around an opening in an interior sidewall of a tubular structure, where the pouch portion extends into the tubular structure for filtering fluid flowing past the frame in the tubular structure.
Across the independent claims, the core claimed structure is a sealing frame that seals a first filter around an opening in a tubular sidewall, combined with a pouch portion or pouch-forming second filter that extends into the tubular cross section to filter particles from fluid flowing past the opening.
Stated Advantages
Mitigating embolization.
Reducing eddy currents.
Reducing vortices and localized vortices.
Reducing turbulence.
Reducing pressure variation at the sealing interface.
Improving hemodynamics.
Documented Applications
Use in an aortic arch during transcatheter valve procedures to mitigate embolization and improve hemodynamics by reducing eddy currents, vortices, turbulence, and pressure variation at the sealing interface.
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