US 2026/0306260 A1 · DELIVERY SYSTEM FOR PROSTHETIC HEART VALVE

Abstract

An implant delivery tool includes proximal and distal capsule portions (51, 53) and an elongate implant holder (40) including a proximal- and distal-capsule-moving-tubes (301, 310). A safety mechanism (300) includes a proximal capsule locker (302), a sleeve (312), and an intermediate tube (314) having a collapsible proximal portion (318) formed of at least two elongate teeth (320) each having a proximal engaging element (322). In a locked state of the safety mechanism (300), a shoulder (308) of the proximal capsule locker (302) is distal to the proximal engaging elements (322) and the sleeve (312) is within the tube (314) such that an outer surface of the sleeve (312) is between elements (322), preventing collapsing of the teeth (320). The proximal engaging elements (322) of the teeth (320) remain engaged with the shoulder (308) and restrict proximal movement of the proximal capsule portion (51). Other embodiments are also described.

A delivery tool for delivering an implant to a heart of a patient, the delivery tool comprising:

a delivery catheter having a lumen therethrough;
a distal capsule portion configured to house a distal portion of the implant;
a proximal capsule portion configured to house a proximal portion of the implant, the proximal and distal capsule portions being movable with respect to each other;
an elongate implant holder slidable within the lumen of the delivery catheter and reversibly couplable to the implant, the elongate implant holder comprising:
a proximal-capsule-moving-tube coupled to a proximal end of the proximal capsule portion such that proximal movement of the proximal-capsule-moving-tube moves the proximal capsule portion proximally, and distal movement of the proximal-capsule-moving-tube moves the proximal capsule portion distally;
a distal-capsule-moving-tube coupled to the distal capsule portion such that proximal movement of the distal-capsule-moving-tube moves the distal capsule portion proximally, and distal movement of the distal-capsule-moving-tube moves the distal capsule portion distally;
and
a safety mechanism comprising:
a proximal capsule locker which surrounds and is coupled to the proximal-capsule-moving-tube, the proximal capsule locker being shaped so as to define a midsection protrusion which protrudes into a lumen of the proximal-capsule-moving-tube, the midsection having a midsection-inner-diameter which is narrower than remaining portions of the proximal capsule locker such that the midsection of the proximal capsule locker forms a shoulder;
a locking sleeve coupled to and surrounding the distal-capsule-moving-tube, the locking sleeve having a locking-sleeve-outer diameter, wherein the distal-capsule-moving-tube has a releasing portion proximal to the locking sleeve, the releasing portion having a releasing-portion-outer diameter that is narrower than the locking-sleeve-outer diameter, and
an intermediate tube which surrounds the distal-capsule-moving-tube, the intermediate tube having:
an intermediate-tube lumen through which (i) the distal-capsule-moving-tube, and (ii) and the locking sleeve slide,
a distal tubular portion, and
a collapsible proximal portion formed of at least two elongate teeth each having a proximal engaging element,
wherein:
in a locked state of the safety mechanism:
the shoulder of the proximal capsule locker is disposed distally to the proximal engaging elements of the intermediate tube,
in response to proximal movement of the proximal capsule portion and of the proximal capsule locker by the proximal-capsule-moving-tube, the shoulder of the proximal capsule locker is moved closer to the proximal engaging elements,
in response to continued proximal movement of the proximal capsule portion and of the proximal capsule locker by the proximal-capsule-moving-tube, the shoulder of the proximal capsule locker abuts against the proximal engaging elements, and
the locking sleeve of the distal-capsule-moving-tube is disposed within the lumen of the intermediate tube and in a manner in which an outer surface of the locking sleeve of the distal-capsule-moving-tube is disposed between the proximal engaging elements and prevents collapsing of the at least two elongate teeth such that the proximal engaging elements of the teeth remain engaged with the shoulder of the proximal capsule locker and remain in a state in which the proximal engaging elements restrict further proximal movement of the proximal capsule portion,
following movement of the proximal capsule portion and engaging of the shoulder with the proximal engaging elements, the distal-capsule-moving-tube is configured to be moved axially distally through the intermediate-tube lumen so as to move the distal capsule portion distally and transition the safety mechanism into an unlocked state, and
in response to distal movement of the distal capsule portion by the distal-capsule-moving-tube, the locking sleeve moves distally beyond the proximal engaging elements of the teeth and the releasing portion of the distal-capsule-moving-tube moves within the lumen of the intermediate tube and in between (1) the proximal engaging elements and (2) at least a portion of the at least two elongate teeth in a manner which allows for the collapsing of the at least two elongate teeth such that the proximal engaging elements of the teeth are disengaged from the shoulder, and the further proximal movement of the proximal capsule portion is enabled.

19 more elements

Delivery system for prosthetic heart valve

Life of this patent

Delivery system for prosthetic heart valve

Life of this patent

Abstract

Claims20