Percutaneous implant delivery system
Inventors
SINGHVI, Abhijeet • SOLANKI, Chirag Maheshbhai • PANDEY, Shivanshu • MUNJANI, Akashkumar Ashokbhai
Assignees
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Publication Number
US-12485028-B2
Publication Date
2025-12-02
Expiration Date
Abstract
A prosthetic implant catheter delivery system is described. The delivery system includes a handle, a capsule, a tip, and a catheter assembly. The catheter assembly includes an outer shaft, a stability shaft, a catheter shaft, an inner shaft, and a guidewire shaft where the catheter shaft and the inner shaft (combinedly with the guidewire shaft) are utilized in the implant loading, positioning, and deployment. Only the stability shaft is fixed. The handle includes screw-based primary rotational mechanism and secondary rotational mechanism. The secondary rotational mechanism also includes a push-pull mechanism. The delivery system has improved pushability and controllability.
Core Innovation
The invention relates to a percutaneous catheter for delivery of an implant, including a primary rotary knob engaged with a threaded wheel through threads. The threaded wheel is connected with a primary screw shaft that is a hollow cylinder having a continuous spiral groove on a peripheral surface. A casing attached to a handle housing encompasses the primary screw shaft, and the casing provides at least one casing slot on a peripheral surface.
An indicator pin is connected to a catheter shaft and is engaged in the continuous spiral groove of the primary screw shaft. The indicator pin projects through the casing slot(s) and is movable only in a longitudinal direction, with the catheter shaft connected to the indicator pin at one end and a capsule on another end. Catheter movement in the longitudinal direction is configured to be based on longitudinal movement of the indicator pin, where longitudinal motion of the indicator pin is caused by rotary movement of the primary screw shaft from rotating the primary rotary knob.
The catheter further includes a push-pull assembly comprising a secondary rotary knob engaged with a secondary screw shaft through threads. The secondary screw shaft is connected to an inner shaft at one end, and rotary movement of the secondary rotary knob is configured to cause longitudinal movement of the inner shaft. The described delivery controls and feedback include a display of extent of delivery based on movement of the indicator pin, an audible/visual ratchet-style feedback mechanism, and a release button that restricts indicator-pin/catheter advancement at a predefined deployment extent.
Claims Coverage
The independent claim clm-00001 defines a percutaneous catheter architecture having two linked longitudinal-motion paths driven by a primary rotary knob through a hollow primary screw shaft with a continuous spiral groove and an indicator pin constrained by casing slots, and by a secondary rotary knob through a push-pull assembly driving an inner shaft. The claim set includes dependent refinements for movement indication, release-based restricting or reversing behavior, ratchet feedback, and additional structural engagement features, with dependent embodiments covering multiple implant categories.
Percutaneous catheter with primary rotary knob driving longitudinal catheter motion
A primary rotary knob engaged with a threaded wheel through threads; the threaded wheel connected with a primary screw shaft that is a hollow cylinder with a continuous spiral groove; a casing attached to a handle housing and encompassing the primary screw shaft with at least one casing slot; and an indicator pin connected to a catheter shaft and engaged in the continuous spiral groove, the indicator pin projecting through the casing slot and movable only in a longitudinal direction, where the catheter shaft is connected with the indicator pin at one end and a capsule at another end.
Indicator-pin constrained longitudinal movement via continuous spiral groove
An indicator pin connected to a catheter shaft and engaged in the continuous spiral groove of the hollow primary screw shaft, where the indicator pin projects through the at least one casing slot and is movable only in a longitudinal direction, enabling longitudinal movement of the catheter shaft based on longitudinal movement of the indicator pin.
Push-pull assembly with secondary rotary knob driving inner shaft longitudinal movement
A push-pull assembly comprising a secondary rotary knob engaged with a secondary screw shaft through threads, the secondary screw shaft connected to an inner shaft at one end, wherein rotary movement of the secondary rotary knob is configured to cause longitudinal movement of the inner shaft.
Catheter longitudinal movement based on rotary movement of primary screw shaft
The catheter shaft configured to move in the longitudinal direction based on longitudinal movement of the indicator pin due to rotary movement of the primary screw shaft caused by rotating the primary rotary knob.
Across the independent claim, the inventive contribution centers on converting primary rotary knob rotation into constrained longitudinal indicator-pin travel using a hollow primary screw shaft with a continuous spiral groove and casing slots, and using the resulting longitudinal travel to drive catheter and capsule movement, with a secondary rotary knob push-pull assembly providing a separate longitudinal drive for an inner shaft.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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