Medical device delivery system

Patent metadata

Field	Value
Publication number	US-9993648-B2
Application number	US-201514741656-A
Country	US
Kind code	B2
Filing date	Jun 17, 2015
Priority date	Mar 27, 2015
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

The disclosure describes techniques and systems for delivering an implantable medical device. In one example, an implantable medical device (IMD) delivery system may include an elongated member comprising a first distal end configured to mate with the IMD, a resilient member disposed along at least a portion of the elongated member, a housing configured to accept a first proximal end of the elongated member and a second proximal end of the resilient member, a rotation control mechanism wherein user movement of the rotation control mechanism causes rotation of the elongated member with respect to the housing and a fixation element of the IMD into tissue, and a deflection control mechanism wherein user movement of the deflection control mechanism causes longitudinal displacement of the resilient member along a longitudinal axis of the elongated member and the housing resulting in angular deflection of the first distal end of the elongated member.

First claim

What is claimed is:

1. An implantable medical device delivery system, the system comprising:
an elongated member comprising a first distal end and a first proximal end, the first distal end configured to mate with an implantable medical device having a fixation element;
a resilient member defining a second distal end and a second proximal end, the resilient member disposed along at least a portion of the elongated member;
a housing configured to accept the first proximal end of the elongated member and the second proximal end of the resilient member;
a rotation control mechanism coupled to the housing and a portion of the elongated member, wherein user movement of the rotation control mechanism causes rotation of the elongated member with respect to the housing for rotating the fixation element of the implantable medical device into tissue; and
a deflection control mechanism coupled to the housing and the second proximal end of the resilient member, wherein user movement of the deflection control mechanism causes longitudinal displacement of the resilient member along a longitudinal axis of the elongated member and the housing resulting in angular deflection of the first distal end of the elongated member, and wherein the deflection control mechanism allows rotation of the second proximal end of the resilient member about the longitudinal axis matching rotation of the elongated member caused by user movement of the rotation control mechanism.

2. The system of claim 1 , wherein the elongated member is an inner elongated member, and wherein the system further comprises:
an outer elongated member surrounding at least a portion of the inner elongated member, the outer elongated member configured to cover at least a portion of the implantable medical device; and
a deployment mechanism coupled to the housing and a proximal end of the outer elongated member, the deployment mechanism comprising a slider coupled to the proximal end of the outer elongated member and defining an aperture through which the inner elongated member is allowed to rotate, wherein user movement of the deployment mechanism causes longitudinal displacement of the slider and the outer elongated member along the longitudinal axis with respect to the housing and the inner elongated member, and wherein proximal movement of the outer elongated member exposes the implantable medical device.

3. The system of claim 1 , further comprising the implantable medical device, and wherein the implantable medical device comprises a helical fixation element.

4. The system of claim 1 , wherein the elongated member comprises a keyed surface at the distal end of the elongated member, wherein the keyed surface is configured to mate with a keyed structure defined by the implantable medical device to translate rotational force from the elongated member to the implantable medical device.

5. The system of claim 1 , wherein the housing defines a rib extending inwards towards a wheel of the rotation control mechanism, wherein the wheel comprises protrusions and depressions along an outer surface of the wheel, and wherein rotation of the rotation control mechanism and the wheel cause periodic contact episodes between the protrusions and the rib, each contact episode signaling an amount of rotational displacement of the elongated member.

6. The system of claim 1 , wherein the rotation control mechanism comprises a rotation limiting structure, the rotation limiting structure coupled to the rotation control mechanism via mating threaded structures and configured to contact a portion of the housing after the rotation control mechanism rotates the elongated member a predetermined number of revolutions.

7. An implantable medical device delivery system, the system comprising:
an elongated member comprising a first distal end and a first proximal end, the distal end configured to mate with an implantable medical device having a fixation element;
a resilient member defining a second distal end and a second proximal end, the resilient member disposed along at least a portion of the elongated member;
means for housing the first proximal end of the elongated member and the second proximal end of the resilient member;
means for rotating the elongated member with respect to the means for housing the first proximal end of the elongated member for rotating the fixation element of the implantable medical device into tissue; and
means for deflecting the first distal end of the elongated member via longitudinal displacement of the resilient member along a longitudinal axis of the elongated member, the deflection being angular deflection of the first distal end of the elongated member, and wherein the means for deflecting the first distal end of the elongated member allows rotation of the second proximal end of the resilient member about the longitudinal axis matching rotation of the elongated member caused by user movement of the means for rotating the elongated member.

8. The system of claim 7 , wherein the elongated member is an inner elongated member, and wherein the system further comprises:
an outer elongated member surrounding at least a portion of the inner elongated member, the outer elongated member configured to cover at least a portion of the implantable medical device; and
a deployment mechanism coupled to the means for housing the first proximal end of the elongated member and a proximal end of the outer elongated member, the deployment mechanism comprising a slider coupled to the proximal end of the outer elongated member and defining an aperture through which the inner elongated member is allowed to rotate, wherein user movement of the deployment mechanism causes longitudinal displacement of the slider and the outer elongated member along the longitudinal axis with respect to the means for housing the first proximal end of the elongated member and the inner elongated member, and wherein proximal movement of the outer elongated member exposes the implantable medical device.

9. The system of claim 7 , wherein:
the means for deflecting the first distal end of the elongated member comprises:
a slider configured to move along the longitudinal axis, the slider comprising a protrusion extending out from the means for housing the first proximal end of the elongated member and a cylinder attached to the protrusion;
a shaft comprising at least one rib extending longitudinally along an exterior surface of the shaft, wherein at least a portion of the shaft is disposed within the cylinder of the slider, and
a collar defining an aperture, at least one channel extending radially outward from the aperture and longitudinally along the collar, and a mounting hole configured to mount the second proximal end of the resilient member, the at least one channel configured to mate with the at least one rib, wherein at least a portion of the collar is disposed between the cylinder and the shaft such that the collar can rotate within the cylinder and slide longitudinally along the shaft, and wherein user movement of the slider in the longitudinal direction causes longitudinal displacement of the collar and the resilient member; and

the means for rotating the elongated member comprises a wheel coupled to the means for housing the first proximal end of the elongated member and at least partially exposed externally from the means for housing the first proximal end of the elongated member, the wheel attached to and concentric with the portion of the elongated member, the wheel coupled to a distal end of the shaft of the means for deflecting the first distal end of the elongated member such that rotation of the wheel causes rotation of the shaft and the collar.

10. The system of claim 7 , further comprising

Assignees

• Medtronic Inc

Inventors

• Kelly Tomas K
• Mcdonnell Paula
• Ward Sean
• Mcevoy Richard

Classifications

• A61M25/0082

  Catheter tip comprising a tool · CPC title

• A61N1/059

  Anchoring means · CPC title

• A61N1/37205

  Microstimulators, e.g. implantable through a cannula · CPC title

• A61N1/37518

  Anchoring of the implants, e.g. fixation · CPC title

• A61N1/0573

  chacterised by means penetrating the heart tissue, e.g. helix needle or hook · CPC title