Systems, devices and methods for delivery systems
Inventors
Wallace, Daniel T. • Gregg, Peter W. • Boyette, Jeremy J. • Haynes, Evelyn N. • Noe, Spencer C. • Chu, Diana L.
Assignees
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Publication Number
US-12746122-B2
Publication Date
2026-09-29
Expiration Date
Abstract
Delivery systems for expandable and stented implants include adjustable tensioning members that control the expansion of the implant along the length of the implant. The tensioning members are wound onto one or more rotors located on the distal segment of the delivery system, which are rotated to unwind the tensioning members and incrementally expand the implant. Positioning mechanisms are also provided to adjust the position and orientation of the implant during delivery.
Core Innovation
The delivery system comprises a proximal handle with an actuator coupled to a rotatable drive shaft in a catheter body, a stator housing, and a rotor having at least one tension line attachment site. A tensioning member is releasably coupled to a self-expanding implant and fixedly coupled to the rotor attachment site, while a movable sheath is positioned over the catheter body. The actuator is coupled to the rotatable drive shaft to actuate the rotor, and the implant has contracted and expanded configurations.
A further delivery system connects the catheter body to an implant delivery body using drive shafts with mechanical interfit interfaces and attachable locking structures. The implant delivery body houses a stator housing and a rotor carried by the second drive shaft with a tension line attachment site, and a movable sheath is positioned over the catheter body. This configuration allows tensioning members to be released incrementally or differentially to support positioning and controlled deployment.
Claims Coverage
The claim coverage identifies two independent claims covering two delivery-system configurations, providing two inventive features.
Handle-driven rotor tensioning a self-expanding implant
A proximal handle comprising an actuator is coupled to a rotatable drive shaft in a catheter body. A rotor attached to the drive shaft is located in a stator housing and includes at least one tension line attachment site. A tensioning member is releasably coupled to a self-expanding implant and fixedly coupled to the rotor attachment site, and a movable sheath is located over the catheter body.
Mechanically interfitting catheter and implant delivery bodies
A first rotatable drive shaft in a catheter body has a mechanical interfit interface configured to form a mechanical interfit with a second rotatable drive shaft in an implant delivery body. The second drive shaft carries a rotor positioned in a stator housing with at least one tension line attachment site. Locking structures coupled to the catheter body and the implant delivery body attach to one another, and a movable sheath is located over the catheter body.
The independent claims cover a handle-driven rotor and tensioning member arrangement for a self-expanding implant, and delivery-system configurations coupling catheter and implant delivery bodies via mechanically interfitting drive shafts and attachable locking structures.
Stated Advantages
Incremental or differential release of tensioning members supports positioning and controlled deployment.
Documented Applications
A catheter-based delivery system for positioning and deploying a self-expanding implant.
Delivery of expandable implants, including an exemplary valve-stent delivery configuration.
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