US 9,750,931 B2Granted

Interventional medical systems, assemblies and methods

AssigneeMedtronic, Inc.

InventorsRónán Wood, Sean Ward, James M Keaveney

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Abstract

A system for delivering an implantable medical device includes a loading assembly and a catheter. The loading assembly includes a deployment member and a sidewall defining a chamber into which the device may be pulled through a distal opening thereof, so that the sidewall holds fingers of the device's fixation member in an extended condition while a temperature in the chamber is lowered. When the chamber is connected to the catheter, advancing the deployment member pushes the device, with fixation fingers in the extended condition, into a delivery lumen of the catheter. With the catheter positioned within a patient, the device can be pushed into a distal portion of the catheter while a relatively cold fluid is infused through the delivery lumen. While holding the deployment member in place, retracting the catheter exposes the device fixation fingers out from the lumen, for engagement with tissue at the implant site.

Claims10

Dependent claims

An interventional medical system for delivering an implantable medical device to an implant site, the device including an electronic controller, a hermetically sealed housing containing the controller, an electrode electrically coupled to the controller and mounted in proximity to a distal end of the housing, and a fixation member mounted to the distal end of the housing, the fixation member comprising a plurality of fingers spaced apart from one another around a perimeter of the distal end of the housing, each finger being elastically deformable between a relaxed condition and an extended condition, a free end of each finger extending distally away from the distal end of the device housing, when the finger is in the extended condition, and the system comprising:

a loading assembly including a deployment member and a capsule, the deployment member including an elongate shaft and an enlarged distal-most end coupled thereto, the distal-most end being configured to engage around a proximal end of the implantable medical device housing, the capsule including a sidewall, a seal member, and a connector, the sidewall defining a chamber of a size to contain therein the implantable medical device and the distal-most end of the deployment member engaged therewith, the chamber including a proximal opening formed by the seal member and a distal opening sized for passage therethrough of the device and the distal-most end of the deployment member engaged therewith, the distal-most end being sized to prevent passage thereof through the proximal opening, the seal member being configured for sealing and sliding engagement around the shaft of the deployment member, and the connector being formed around the distal opening of the chamber;
and
a delivery catheter including an elongate tube and a handle coupled to a proximal end of the tube, the tube and the handle defining a device delivery lumen that extends from a device entry port formed in the handle to a device exit port that terminates a distal portion of the tube, and the handle including a connector formed around the device entry port, the connector of the handle being configured to mate with the connector of the loading assembly capsule;
wherein the size of the capsule chamber of the loading assembly is such that the sidewall holds the fingers of the device fixation member in the extended condition when the device is contained within the chamber;
and
when the connector of the loading assembly capsule is mated with the connector of the delivery catheter handle, the device entry port of the delivery catheter is aligned with the distal opening of the capsule chamber thereby allowing passage of the device, with the fixation fingers in the extended condition, from the chamber and into the device delivery lumen of the delivery catheter.

3 more elements

An assembly for loading an implantable medical device into a delivery catheter, the device including an electronic controller, a hermetically sealed housing containing the controller, an electrode electrically coupled to the controller and mounted in proximity to a distal end of the housing, and a fixation member mounted to the distal end of the housing, the fixation member comprising a plurality of fingers spaced apart from one another around a perimeter of the distal end of the housing, each finger being elastically deformable between a relaxed condition and an extended condition, a free end of each finger extending distally away from the distal end of the device housing, when the finger is in the extended condition, and the delivery catheter including an elongate tube and a handle coupled to a proximal end of the tube, the tube and the handle defining a device delivery lumen, the device delivery lumen extending from a device entry port within the handle to a device exit port in proximity to a distal end of the tube, and the handle including a connector formed around the device entry port, and the assembly comprising:

a deployment member including an elongate shaft and an enlarged distal-most end coupled thereto, the distal-most end being configured to engage around a proximal end of the implantable medical device housing;
and
a capsule including a sidewall, a seal member, and a connector, the sidewall defining a chamber of a size to contain therein the implantable medical device and the distal-most end of the deployment member engaged therewith, the chamber including a proximal opening formed by the seal member and a distal opening sized for passage therethrough of the device and the distal-most end of the deployment member engaged therewith, the distal-most end being sized to prevent passage thereof through the proximal opening, the seal member being configured for sealing and sliding engagement around the shaft of the deployment member, and the connector being formed around the distal opening of the chamber and being configured to mate with the connector of the delivery catheter handle;
wherein the sidewall of the capsule chamber holds the fingers of the device fixation member in the extended condition when the device is contained within the chamber;
and
when the connector of the capsule is mated with the delivery catheter handle, the device entry port of the handle is aligned with the distal opening of the capsule chamber thereby allowing passage of the device, with the fixation fingers in the extended condition, from the chamber and into the device delivery lumen of the delivery catheter.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/620,904Filed 12 Feb 2015
Published: US 2016/0235971 A118 Aug 2016
Granted: 5 Sep 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

A61N 1/362
For stimulation: heart stimulators
A61B 17/3468
Trocars; Puncturing needles: for implanting or removing devices, e.g. prostheses, implants, seeds, wires
A61N 1/0573
Anchoring means; Means for fixing the head inside the heart: chacterised by means penetrating the heart tissue, e.g. helix needle or hook
A61N 1/372
For stimulation: arrangements in connection with the implantation of stimulators

Family

US 2016/0235971 A1Pre-grant publication · published 18 Aug 2016
US 9,750,931 B2This patent

From the US filing history. Foreign family members aren’t listed.

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