Guide catheter for flow modifying device
Inventors
Wilson, Scott R. • Choy, Sai Ho • Jackson, Keith Alan • Wong, Ernest Wai • Vanney, Guy Patrick • Ladoucer, Jason Lee • Colen, Fredericus Antonius
Assignees
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Publication Number
US-12245961-B2
Publication Date
2025-03-11
Expiration Date
Abstract
A system for implanting a flow modifying device in a heart comprises a flow modifying device comprising a tubular body comprising first and second openings located at first and second ends of the tubular body and a neck positioned between the first opening and the second opening, and a guide catheter comprising a flexible elongate shaft comprising a proximal portion comprising a fitting for receiving an insertion instrument and distal portion comprising an enlarged distal tip to prevent the flexible elongate shaft from passing through the flow modifying device. A guide catheter for cannulating a coronary sinus from a superior vena cava comprises a pre-formed distal portion comprising a proximal straight zone, a proximal curved zone extending along a first curved path, a distal straight zone extending along a straight path and a distal curved zone extending along a second curved path. The guide catheter can have different stiffnesses.
Core Innovation
The invention provides a system for implanting a flow modifying device in vasculature of a heart, where the flow modifying device comprises a tubular body with a first opening at a proximal end, a second opening at a distal end, and a neck positioned between the first opening and the second opening. The tubular body is configured to expand from a first configuration to a second configuration such that in the second configuration the first opening comprises a first diameter and the neck comprises a second diameter smaller than the first diameter.
The system further includes a guide catheter having a flexible elongate shaft with a proximal portion comprising a fitting for receiving an insertion instrument and a distal portion comprising a distal tip receivable by the first opening of the tubular body when the tubular body is in the second configuration. The distal tip comprises an enlarged tip configured to prevent the flexible elongate shaft from passing through the neck of the flow modifying device when the tubular body is in the second configuration.
In the disclosed refinements, the system may include a containment sheath slidable along the flexible elongate shaft and configured to collapse an enlarged tip. The system may also include a balloon catheter comprising an elongate shaft with an inflatable balloon configured to be inserted into the tubular body of the flow modifying device to expand the first and second openings in the first configuration, where a first end of the balloon catheter engages an enlarged tip of the guide catheter to urge the inflatable balloon back into a deflated state.
The disclosed geometry and interaction constraints specify that the enlarged tip engages the inflatable balloon in a non-axial direction, and that the enlarged tip may have a conical wall angled relative to the flexible elongate shaft so it is tangent to the first end of an inflatable balloon in an inflated state. Additional refinements configure the enlarged tip to reinforce the guide catheter against inward forces tending to invaginate the catheter during balloon deflation.
Claims Coverage
The independent claim is clm-00001. It is focused on a system that combines an expandable flow modifying device having a smaller neck diameter in an expanded state with a guide catheter distal enlarged tip that prevents the catheter shaft from passing through that neck in the expanded configuration.
Expandable flow modifying device with neck smaller than proximal opening in expanded configuration
A flow modifying device comprising a tubular body with a first opening at a proximal end, a second opening at a distal end, and a neck positioned between the first and second openings, where the tubular body expands from a first configuration to a second configuration such that in the second configuration the first opening comprises a first diameter and the neck comprises a second diameter smaller than the first diameter.
Guide catheter distal tip with enlarged tip preventing shaft passage through the neck in expanded configuration
A guide catheter comprising a flexible elongate shaft with a proximal portion comprising a fitting for receiving an insertion instrument and a distal portion comprising a distal tip receivable by the first opening of the tubular body when the tubular body is in the second configuration, where the distal tip comprises an enlarged tip to prevent the flexible elongate shaft from passing through the neck of the flow modifying device when the tubular body is in the second configuration.
Across the independent claim, the inventive concept is realized by pairing an expandable flow modifying device whose expanded neck has a smaller diameter with a guide catheter enlarged distal tip that blocks shaft passage through that neck when the device is in the second configuration.
Stated Advantages
Documented Applications
No documented applications found
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