Systems and methods for force reduction in delivery systems

Patent metadata

Field	Value
Publication number	US-2024398564-A1
Application number	US-202418798753-A
Country	US
Kind code	A1
Filing date	Aug 8, 2024
Priority date	Feb 9, 2022
Publication date	Dec 5, 2024
Grant date	—

Abstract

Examples of the present disclosure may be directed to reducing a tension force or a compression force in one or more shafts of the delivery system. An elongate catheter may include the one or more shafts. The tension force or compression force may result from residual tension or compression in a shaft resulting from movement of the shaft. The tension force or compression force may alternatively or in combination result from interacting forces across a plurality of the shafts. The tension force or compression force may hinder the operation of the delivery system and in instances may damage the delivery system. Systems, devices, and methods for reducing the tension force or compression force are disclosed herein.

First claim

What is claimed is:

1 . A delivery system for an implant, the delivery system comprising:
a handle; an elongate catheter coupled to the handle, the elongate catheter including one or more shafts and including an implant retention area for retaining the implant; a control mechanism on the handle for longitudinally sliding the one or more shafts; and a force reduction mechanism that is selectively actuatable for reducing a force in at least one of the one or more shafts, wherein the force reduction mechanism is adapted to reduce the force upon a longitudinal threshold force being met in the at least one of the one or more shafts.

2 . The delivery system of claim 1 , wherein the control mechanism includes an actuator for controlling the longitudinal sliding of the one or more shafts.

3 . The delivery system of claim 2 , wherein the force reduction mechanism includes an adapter engaged with the at least one of the one or more shafts, the adapter being selectively engaged with the actuator, wherein the adapter is capable of disengaging from the actuator to thereby allow relative movement between the actuator and the at least one of the one or more shafts.

4 . The delivery system of claim 3 , wherein the actuator comprises a knob.

5 . The delivery system of claim 3 , further comprising a control device for disengaging the adapter from the actuator.

6 . The delivery system of claim 1 , further comprising an indicator for indicating a longitudinal force in the at least one of the one or more shafts.

7 . The delivery system of claim 1 , wherein the at least one of the one or more shafts is an outer sheath for covering the implant retention area.

8 . The delivery system of claim 1 , wherein the at least one of the one or more shafts is a manifold shaft coupled to one or more sutures for coupling to the implant.

9 . The delivery system of claim 1 , further comprising:
an actuator knob on the handle engaged with and for advancing or retracting at least one of the one or more shafts, the actuator knob including a proximal portion and a distal portion; and a releasable coupler configured to engage an elastomeric body to releasably couple the proximal portion of the actuator knob to the distal portion of the actuator knob, the releasable coupler extending between the proximal portion and the distal portion, and wherein the releasable coupler is adapted to disengage from the elastomeric body to allow the proximal portion to disengage from the distal portion upon a longitudinal threshold force being met in the at least one of the one or more shafts engaged with the actuator knob.

10 . The delivery system of claim 1 , wherein the elongate catheter is for delivering the implant comprising a prosthetic heart valve to a heart valve of a patient's body.

11 . A delivery system for an implant, the delivery system comprising:
an elongate catheter including an implant retention area for retaining the implant, the elongate catheter including one or more shafts; and a control mechanism for moving the one or more shafts, the control mechanism including an actuator knob having an inner body and an outer body extending around the inner body, the outer body adapted to slip relative to the inner body to limit a tension force or a compression force in at least one of the one or more shafts transmitted by the actuator knob to the at least one of the one or more shafts.

12 . The delivery system of claim 11 , wherein the outer body comprises an outer shell.

13 . The delivery system of claim 11 , wherein the inner body is for engaging an adapter coupled to a proximal end portion of the at least one of the one or more shafts.

14 . The delivery system of claim 13 , wherein the inner body is for rotating about the adapter and conveying rotational motion of the actuator knob to a longitudinal motion of the adapter.

15 . The delivery system of claim 11 , wherein the inner body or the outer body includes a bearing surface for allowing the inner body to rotate relative to the outer body.

16 . The delivery system of claim 11 , further comprising a displacement body for engaging the outer body with the inner body to retain a rotational position of the outer body relative to the inner body, and wherein the displacement body is biased towards an engagement surface of the outer body or the inner body.

17 . The delivery system of claim 16 , wherein the displacement body extends radially towards the engagement surface.

18 . A delivery system for implanting a medical device in a body, the delivery system comprising:
a handle; an elongate catheter coupled to the handle, the elongate catheter including an inner shaft and an outer shaft, wherein the inner shaft is coupled to the medical device and wherein the outer shaft has an implant retention area along a distal end portion for retaining the medical device in a compressed configuration; an actuator on the handle for longitudinally sliding the outer shaft relative to the handle via a threaded engagement; and a force reduction mechanism that is selectively actuatable for reducing axial tension or compression in the outer shaft by disengaging the threaded engagement between the actuator and the outer shaft.

19 . The delivery system of claim 18 , wherein the force reduction mechanism comprises an adapter coupled to a proximal end portion of the outer shaft and having a threaded surface sized for engagement with the actuator, wherein the adapter is operable to disengage from the actuator.

20 . The delivery system of claim 19 , wherein the threaded surface of the adapter is spring biased for engaging the actuator during movement of the outer shaft, and the threaded surface of the adapter is adapted to disengage from the actuator upon a control device adjusting a position of the adapter.

Assignees

• Edwards Lifesciences Corp

Inventors

• Edwards Jesse Robert
• Scheinblum Taylor Jacob
• Poulsen Nikolai Brent
• Luong Hieu Minh
• Landon David Robert
• Rickerson Cooper Ryan
• Cornejo Jessie Ambriz
• Okabe Hiroshi

Classifications

• A61F2220/0016

  with sharp anchoring protrusions, e.g. barbs, pins, spikes · CPC title

• A61F2/2418

  Scaffolds therefor, e.g. support stents · CPC title

• A61F2/2436 Primary

  Deployment by retracting a sheath · CPC title

• A61F2/2439

  Expansion controlled by filaments · CPC title

• A61F2/9517 Primary

  handle assemblies therefor · CPC title