US 9,539,423 B2Granted

Interventional medical systems, tools, and methods of use

AssigneeMedtronic, Inc.

InventorsMatthew D Bonner, Todd J Sheldon, Kathryn Hilpisch, Noelle C Neafus, Ronan Wood

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Abstract

Delivery tools of interventional medical systems facilitate deployment of relatively compact implantable medical devices that include extensions, for example, cardiac pacing devices that include an extension for atrial sensing, wherein an entirety of the device is contained within the delivery tool while a distal-most portion of the tool is navigated to a target implant site. Once at the implant site, a device fixation member may be exposed out from a distal opening of the tool, for initial deployment, while the extension remains contained within the delivery tool. The tool includes a grasping mechanism, operable, within and without a lumen of the tool, to alternately grip and release the device extension, for example, to position a distal end of the extension after the tool has been withdrawn from over an entirety of the initially deployed device.

Claims11

Dependent claims

An interventional medical system comprising:

an implantable medical device comprising an electronic controller, a hermetically sealed housing containing the controller, a fixation member, and an extension coupled to the controller, the extension extending from a proximal end of the housing, and the extension including a sense electrode;
a delivery tool facilitating deployment of the device, the tool comprising:
a handle including a control member;
an elongate grasping mechanism including a tubular shaft and a pair of arms longitudinally movable within a lumen of the tubular shaft, each arm including a curved distal end protruding from a distal opening of the lumen of the shaft, at a distal end of the shaft, the curved distal ends being configured to spread apart from one another and to close together, via longitudinal movement of the arms within the lumen of the shaft, and the curved distal ends being configured to grip the extension of the device;
and
an elongate deployment tube including a proximal end coupled to the control member of the handle, a distal-most portion, and a lumen extending from a proximal opening thereof at the proximal end of the deployment tube to a distal opening thereof that terminates the distal-most portion at a distal end thereof, the grasping mechanism extending within the lumen of the deployment tube such that an entirety of the deployment tube is longitudinally moveable with respect to the grasping mechanism by means of the control member of the handle, and the lumen of the deployment tube, along a length of the distal-most portion, being sized to contain an entirety of the device housing and the fixation member together with the curved distal ends of the arms of the grasping mechanism gripping the device extension when the device extension extends proximally from the distal-most portion within the lumen of the deployment tube;
and
wherein the grasping mechanism is moveable outside the lumen of the deployment tube, distal to the distal opening thereof.

5 more elements

A method for deploying an implantable medical device, the device including an electronic controller, an hermetically sealed housing containing the controller, a fixation member coupled to a distal end of the housing, and an extension coupled to the controller, the extension extending from a proximal end of the housing, the extension including a sense electrode coupled to the extension in proximity to a distal end thereof, and the method comprising:

loading the device into a lumen of a deployment tube of a delivery tool so that the device housing and fixation member are contained in a distal-most portion of the deployment tube and the extension of the device extends proximally from the distal-most portion within the lumen, and so that a pair of arms of a grasping mechanism of the delivery tool grip the extension;
navigating the distal-most portion of the delivery tool deployment tube, with the device loaded therein, into a venous system of a patient, such that the distal-most portion is located in a right ventricle of the patient in proximity to a target implant site;
retracting the deployment tube with respect to the grasping mechanism and the loaded device, to expose the fixation member of the device out through a distal opening of the lumen of the deployment tube, thereby engaging the exposed fixation member of the loaded device with tissue at the target implant site;
withdrawing the delivery tool into a right atrium of the patient and from over an entirety of the device, after engaging the fixation member;
spreading the arms of the grasping mechanism apart to release the grip thereof on the device extension;
moving the grasping mechanism proximally along a length of the device extension and into the right atrium, after spreading the arms thereof;
and
manipulating the grasping mechanism within the right atrium, alternately moving together and spreading the arms thereof as needed, to position the distal end of the extension at a desired location in the right atrium.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/518,087Filed 20 Oct 2014 · us provisional application
Priority: 17 Jul 2014
Published: US 2016/0015968 A121 Jan 2016
Granted: 10 Jan 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification18 codes

A61N 1/0592
Epicardial electrode systems; Endocardial electrodes piercing the pericardium: introducing the lead through the pericardium with a needle
A61B 17/3468
Trocars; Puncturing needles: for implanting or removing devices, e.g. prostheses, implants, seeds, wires
A61N 1/059
Epicardial electrode systems; Endocardial electrodes piercing the pericardium: anchoring means
A61N 1/3624
For treating or preventing abnormally high heart rate: occurring in the atrium, i.e. atrial tachycardia