Method and apparatus for compressing/loading stent-valves
Inventors
Mantanus, Luc • Lombardi, Fabien • Simonin, Pierre • Biadillah, Youssef • Hefti, Jean-Luc • Delaloye, Stephane
Assignees
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Publication Number
US-11786372-B2
Publication Date
2023-10-17
Expiration Date
Abstract
Apparatus (40) for compressing a transcatheter cardiac stent-valve (10) comprises: a first compressor stage (100) including a hollow channel (42) with a tapered interior surface configured for compressing a stent-valve in response to longitudinal advancement of the stent-valve within the channel; and a second compressor stage (102) comprising a crimper for compressing a portion of the stent-valve without longitudinal advancement.
Core Innovation
The invention provides a two-stage apparatus for compressing and/or loading a transcatheter cardiac stent-valve for a delivery catheter. A first compressor stage includes a hollow channel with a tapered or funnel interior surface that progressively compresses the stent-valve in response to longitudinal advancement of a mover or driver, shifting the stent-valve from an expanded state toward a compressed state for delivery preparation.
A second compressor stage includes a crimper that compresses and pinches a portion of the stent-valve without further longitudinal advancement once advancement stops. The arrangement is described in the context of loading onto a multiple-sheath delivery catheter, where distal and proximal sheaths close over respective portions of the stent-valve from opposite directions.
The invention further discloses a segmented loading tube apparatus for loading a stent-valve onto a multiple-sheath delivery catheter. Discrete segments assemble around a catheter portion to define a tubular form fit, retained by an overtube and a threaded nut, and the segments and the overtube may be transparent for viewing.
Claims Coverage
The provided claim set includes two independent claims. The inventive features center on a segmented loading tube apparatus with discrete same-longitudinal-length segments retained in a tubular shape, and on a loading method for a multiple-sheath delivery catheter using distal sheath closure, segmented loading-tube assembly around the proximal sheath, and proximal sheath closure.
Segmented loading tube with same-longitudinal-length discrete segments retained in tubular shape
A loading tube apparatus for compressing and/or loading a stent-valve for a delivery catheter, comprising a plurality of separate, discrete segments that when assembled around a portion of the delivery catheter alone define a tubular shape, wherein all of the plurality of separate, discrete segments have a same longitudinal length; and at least one retainer surrounding the plurality of segments for retaining the plurality of segments in the tubular shape.
Compress, distal sheath closure, assemble segmented loading tube around proximal sheath, proximal sheath closure
A method of loading a stent valve onto a multiple-sheath delivery catheter, compressing at least a portion of the stent-valve to engage attachment elements with a stent-holder; closing the distal sheath over a first portion of the stent-valve including the attachment elements; assembling a loading tube apparatus around at least the proximal sheath, the loading tube apparatus comprising a plurality of separate, discrete segments that alone define a tubular shape and at least one retainer, wherein all of the segments have a same longitudinal length, and closing the proximal sheath over a second portion of the stent-valve.
Across the independent claims, the core coverage centers on a segmented loading tube apparatus formed from discrete same-longitudinal-length segments retained into a tubular shape, and a loading method for a multiple-sheath delivery catheter that uses distal sheath closure, segmented loading-tube assembly around the proximal sheath, and subsequent proximal sheath closure after compressing the stent valve for attachment engagement.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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