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Publication Number
US-11839562-B2
Publication Date
2023-12-12
Expiration Date
Abstract
A crimping method that crimps a stent over multiple catheters. The method includes differentially crimping a stent on certain portions of a balloon catheter so that a second catheter can be threaded through the uncrimped portion of the stent and exit through the links of a conventional stent design or through a specific hole in the stent designed for a branched vessel.
Core Innovation
The invention is directed to treating a bifurcated vessel having a mother vessel and a daughter vessel by deploying a mother stent at a bifurcation while also enabling daughter-vessel access through a side hole of a mother stent. The approach uses a daughter catheter with a daughter expandable member advanced into the daughter vessel and a mother catheter with a mother expandable member positioned relative to the daughter vessel and a carina of the bifurcation.
The method advances the mother catheter and daughter catheter into apposition with a carina of the bifurcation until a resulting tension between the mother and daughter catheters prevents further distal advancement of the mother catheter and the daughter catheter. The method then retracts the daughter expandable member into a side hole of a mother stent that is crimped to the mother expandable member.
After the side hole is aligned with the daughter vessel, the method expands the daughter expandable member to expand a proximal portion of the mother stent into engagement with a portion of the mother vessel proximal to the daughter vessel and to align the side hole with the daughter vessel. Finally, the method expands the mother expandable member to expand a distal portion of the mother stent into engagement with a portion of the mother vessel distal to the daughter vessel.
Claims Coverage
The independent claim covers a bifurcation treatment method with coordinated deployment of a mother stent using a side hole to maintain daughter-vessel access, including apposition at a bifurcation carina, tension-limited advancement, side-hole retraction, and proximal-to-distal mother stent expansion. The claim set also includes optional daughter stent deployment, simultaneous expansion coordination, radiopaque-marker alignment during retraction, therapeutic agent delivery, and a kissing balloon simultaneous inflation mechanic.
Tension-limited apposition of mother and daughter catheters at the bifurcation carina
Advancing a daughter catheter comprising a daughter expandable member through the mother vessel so that the daughter expandable member is advanced into the daughter vessel; advancing a mother catheter comprising a mother expandable member through the mother vessel so that a distal end of the mother expandable member advances distal to the daughter vessel; further advancing the mother catheter and daughter catheter into apposition with a carina of the bifurcation until a resulting tension between the mother and daughter catheters prevents further distal advancement.
Side-hole retraction of daughter expandable member into a mother stent crimped to the mother expandable member
Retracting the daughter expandable member into a side hole of a mother stent crimped to the mother expandable member.
Proximal mother stent expansion and daughter-vessel alignment using daughter expandable member expansion
Expanding the daughter expandable member to expand a proximal portion of the mother stent into engagement with a portion of the mother vessel proximal to the daughter vessel and also to align the side hole with the daughter vessel.
Distal mother stent expansion into engagement with mother vessel distal to the daughter vessel
Expanding the mother expandable member to expand a distal portion of the mother stent into engagement with a portion of the mother vessel distal to the daughter vessel.
Optional daughter stent deployment into engagement with the daughter vessel
Disposing a daughter stent over a daughter expandable member and expanding the daughter stent into engagement with a portion of the daughter vessel.
Simultaneous expansion of daughter stent with proximal portion of the mother stent
Expanding the daughter stent at the same time as the proximal portion of the mother stent into engagement.
Radiopaque-marker alignment during retraction of the daughter expandable member
Retracting the daughter expandable member by retracing it until a radiopaque marker on the daughter catheter aligns with a radiopaque marker on the mother catheter.
Therapeutic agent delivery from a stent to the mother vessel or daughter vessel
Delivering a therapeutic agent from a stent to either a mother vessel or a daughter vessel.
Kissing balloons via simultaneous inflation of mother and daughter expandable members
Simultaneously inflating the mother and daughter expandable members to evenly expand a mother stent adjacent the bifurcation.
Overall, the claim set centers on deploying a mother stent with a side hole aligned to the daughter vessel by retracting a daughter expandable member into the side hole, then expanding the daughter expandable member to drive proximal mother stent engagement and alignment, followed by expanding the mother expandable member to drive distal mother stent engagement. Dependent claims further cover optional daughter stent deployment, simultaneous expansion coordination, radiopaque-marker-controlled retraction, therapeutic agent delivery, and a kissing-balloon simultaneous inflation mechanic.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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