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Publication Number
US-12274633-B2
Publication Date
2025-04-15
Expiration Date
Abstract
A system and method for a stent delivery system, the delivery system having a catheter and a balloon coupled to a distal portion of the catheter. The catheter with the radially expandable member is inserted into a cavity in a mold. Heat and pressure are applied for a period of time which inflates the balloon and imparts a shape memory to a portion of the balloon. The balloon is removed from the cavity of the mold with a shape memory.
Core Innovation
The invention relates to a method for retaining a stent using a stent retention system in which a first radially expandable member on a first elongate shaft is used to hold the stent in alignment between a proximal radiopaque marker and a distal radiopaque marker. The method includes partially crimping a distal portion of the stent onto the first radially expandable member, followed by fully crimping the distal portion so that the stent is embedded onto the first radially expandable member.
The first radially expandable member is disposed in a cavity in a mold, and heat and pressure are applied to impart shape memory to a portion of the first radially expandable member. The mold constrains selected portions so shape memory is imparted to selected portions, including proximal and/or distal portions, while other portions are not imparted.
After the imparting of shape memory and the fully crimping, a second elongate shaft having a second radially expandable member is slidably disposed under a proximal portion of the stent and through a side hole of the stent. The method simultaneously crimpes the stent onto the first radially expandable member and the second radially expandable member.
Claims Coverage
The independent claim covers a stent retention method with five inventive features: marker-aligned partial crimping, full crimping that embeds the stent, mold-imparted shape memory, side-hole delivery of a second expandable member, and simultaneous crimping onto first and second expandable members.
Radiopaque marker-aligned crimping onto a first expandable member
Partially crimping a distal portion of the stent onto a first radially expandable member to hold the stent in alignment between a proximal radiopaque marker and a distal radiopaque marker on the first elongate shaft.
Embedding the stent during full crimping onto the first expandable member
Fully crimping the distal portion of the stent onto the first radially expandable member, wherein fully crimping embeds the stent onto the first radially expandable member.
Mold-imparted shape memory to selected portions of the first expandable member
Applying heat and pressure to the first radially expandable member while disposed in the cavity in the mold to impart shape memory to a portion of the first radially expandable member.
Side-hole delivery of a second expandable member under the stent
Slidably disposing a second elongate shaft having a second radially expandable member under a proximal portion of the stent and through a side hole of the stent after the fully crimping.
Simultaneous crimping onto first and second expandable members
Simultaneously crimping the stent onto the first radially expandable member and the second radially expandable member.
The claim set centers on alignment by proximal and distal radiopaque markers, partial and full crimping onto a first radially expandable member, imparting shape memory in a mold, and simultaneous crimping with a second radially expandable member delivered through a side hole.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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