Hooked spool delivery systems
Inventors
Haynes, Evelyn N. • Wallace, Daniel T. • Gregg, Peter W. • Boyette, Jeremy J. • Noe, Spencer C. • Sutton, Benjamin T. • Stokes, Bruce M.
Assignees
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Publication Number
US-12521240-B2
Publication Date
2026-01-13
Expiration Date
Abstract
Delivery systems for expandable and stented implants include tensioning members that are attached to rotors with hook-like attachment projections are wound onto the shaft of the delivery system, which is then rotated to unwind the tensioning members and incrementally expand the implant.
Core Innovation
The delivery system comprises a proximal handle with a handle housing and a first actuator, a catheter body, and a rotatable drive shaft coupled to the actuator and located in the catheter body. A first stator housing is attached to the distal section of the catheter body and contains a first rotor spool attached to the drive shaft. The rotor spool comprises a spool body, tension line attachment projections, and at least one spool flange.
Each tension line attachment projection comprises a tapered body with a tail tip at its trailing end and a tension line receiving surface at its leading end, with a midline of the tapered body lying in a plane transverse to the longitudinal axis of the drive shaft. A movable sheath is located over the catheter body and is configured to retract and expose the distal section. The system further relates to deployment of an expandable implant, such as a self-expanding implant.
Claims Coverage
The claim coverage identifies one independent claim directed to a delivery system, comprising four inventive features.
Handle-driven catheter assembly
A proximal handle comprises a handle housing and a first actuator coupled to a catheter body containing a rotatable drive shaft coupled to the first actuator.
Rotor spool in stator housing
A first stator housing attached to the distal section of the catheter body comprises an internal opening and an external opening, housing a first rotor spool attached to the rotatable drive shaft with a spool body, tension line attachment projections, and at least one spool flange.
Tapered tension line attachment projections
Each tension line attachment projection comprises a tapered body with a tail tip at a trailing end and a tension line receiving surface at a leading end, with a midline of the tapered body lying in a plane transverse to a longitudinal axis of the rotatable drive shaft.
Retractable sheath
A movable sheath is located over the catheter body and is configured to retract and expose the distal section.
The independent claim combines a handle-driven catheter and rotatable drive shaft with a distal stator housing containing a rotor spool with tapered tension line attachment projections, enclosed by a retractable sheath.
Stated Advantages
The tapered projections are configured to retain tension lines during winding while facilitating release during unwinding.
Documented Applications
The delivery system is used for controlled delivery, incremental release, and deployment of an expandable implant, such as a self-expanding implant with contracted and expanded configurations coupled to the rotor spool by a tensioning member.
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