News Column

Patent Application Titled "Adjustable Stop for Elongate Medical Device Deflection Mechanism" Published Online

August 7, 2014



By a News Reporter-Staff News Editor at Politics & Government Week -- According to news reporting originating from Washington, D.C., by VerticalNews journalists, a patent application by the inventor Lavender, Mark (Maple Grove, MN), filed on January 17, 2013, was made available online on July 24, 2014.

The assignee for this patent application is St. Jude Medical, Atrial Fibrillation Division, Inc.

Reporters obtained the following quote from the background information supplied by the inventors: "a. Technical Field

"This disclosure relates to elongate medical devices, such as, for example and without limitation, catheters and sheaths or introducers. More particularly, this disclosure relates to deflection mechanisms for such elongate medical devices, and elongate medical devices and components thereof that include such deflection mechanisms.

"b. Background Art

"It is known to use elongate medical devices, such as, for example, catheters and sheaths or introducers, when performing various therapeutic and/or diagnostic medical procedures on or in various anatomical structures of a patient's body, such as, for example, the heart. Such devices generally include an elongate shaft having a proximal end portion and a distal end portion, and a handle assembly disposed at the proximal end portion of the shaft. In order to precisely locate and position these devices within the anatomy of the patient, the devices may include means by which the device may be steered or guided as it travels within and through the patient's body. More particularly, these devices may include, among other components, deflection mechanisms that may be manipulated and controlled by a user or physician to allow for the precise locating and positioning of the device.

"In general terms, such deflection mechanisms typically include, at least in part, an actuator and one or more activation wires. The actuator, which is generally associated with the handle assembly of the elongate medical device, is coupled to the activation wires and is configured to cause tension to be selectively applied thereto in order to deflect the shaft of the device in one or more directions. More particularly, each of the activation wires comprises a proximal end and a distal end. The proximal ends of the activation wires are coupled to the actuator, while the distal ends are coupled to one or more pull assemblies disposed at or near the distal end portion of the shaft of the device. As the actuator is manipulated, one or more of the activation wires may be selectively tensioned, thereby effecting movement of the pull assembly, and thus, the deflection of the shaft.

"For example, in one conventional deflection mechanism, the actuator thereof comprises one or more posts that are each configured to be coupled to the proximal end of a respective activation wire. For example, in an instance wherein the deflection mechanism comprises a pair of activation wires, the actuator may include a pair of posts, each one of which has a respective one of the activation wires coupled thereto. In such an instance, as the actuator is manipulated to deflect the shaft in a desired direction, a pulling force is applied onto one of the activation wires, thereby causing tension to be applied to that activation wire, while a pushing force is applied to the other of the two activation wires.

"The foregoing discussion is intended only to illustrate the present field and should not be taken as a disavowal of claim scope."

In addition to obtaining background information on this patent application, VerticalNews editors also obtained the inventor's summary information for this patent application: "An embodiment of a deflection mechanism for use in an elongate medical device may comprise an actuator comprising a rotatable body, the body comprising a channel, the channel comprising a plurality of recesses, and an adjustable stop disposed in at least one of the recesses. The deflection mechanism may further comprise an activation wire having a proximal end and a distal end, and a wire lock attached to the proximal end of the activation wire. The wire lock may be disposed within the channel and may be configured to ride within the channel when the actuator body is rotated so as to increase tension on the activation wire.

"An embodiment of a handle assembly for use in a steerable elongate medical device may comprise a housing defining a cavity and a deflection mechanism. The deflection mechanism may comprise an actuator comprising a rotatable body at least a portion of which is disposed within the cavity of the housing, the body comprising a channel. The deflection mechanism may further comprise an activation wire having a proximal end and a distal end, a wire lock attached to the proximal end of the activation wire, and an adjustable stop disposed across the channel so as apply a force to the wire lock responsive to actuation of said actuator. The channel may be configured to allow placement of the wire stop at multiple locations. The wire lock may be disposed within the channel and may be configured to ride therein when the actuator body is rotated. The activation wire may extend from the channel and into the cavity of the housing.

"An embodiment of a method of manufacturing a handle assembly for an elongate medical device may comprise extending a proximal end of an activation wire into a channel of a rotatable body of the handle assembly and placing an adjustable stop in one or more of a plurality of recesses in the channel such that the activation wire extends through an opening in the adjustable stop and a wire lock at a proximal end of the activation wire cannot extend distally beyond the adjustable stop.

"The foregoing and other aspects, features, details, utilities, and advantages of the present disclosure will be apparent from reading the following description and claims, and from reviewing the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

"FIG. 1 is a plan view of an exemplary elongate medical device in accordance with the present teachings.

"FIG. 2 is an exploded view of the exemplary elongate medical device illustrated in FIG. 1.

"FIG. 3A is an isometric view of portions of the handle assembly and deflection mechanism of the elongate medical device illustrated in FIGS. 1 and 2 when the elongate medical device is in a neutral or non-deflected state.

"FIG. 3B is an isometric view of portions of the handle assembly and deflection mechanism of the elongate medical device illustrated in FIGS. 1 and 2 when the elongate medical device is in a deflected state.

"FIG. 4 is an isometric view of the base member of an exemplary actuator body of the deflection mechanism illustrated in FIGS. 1-3B.

"FIG. 5A is a plan view of a first face of the actuator body base member illustrated in FIG. 4.

"FIG. 5B is an enlarged plan view of a portion of the actuator body base member illustrated in FIG. 5A.

"FIG. 6 is a cross-section view of an exemplary actuator of the deflection mechanism illustrated in FIGS. 1 and 2 taken along line 6-6 in FIG. 1.

"FIGS. 7A and 7B are isometric views of portions of the elongate medical device illustrated in FIG. 1 showing the distal end portion of the shaft of the elongate medical device deflected in different directions.

"FIG. 8A is a side view of an exemplary embodiment of a wire lock of the deflection mechanism illustrated in FIGS. 1 and 2.

"FIG. 8B is a cross-section view of the wire lock illustrated in FIG. 8A taken along the line 8B-8B in FIG. 8A.

"FIG. 9A is an isometric view of an embodiment of an adjustable stop.

"FIG. 9B is a side view of the adjustable stop of FIG. 9A.

"FIG. 9C is a bottom view of the adjustable stop of FIGS. 9A and 9B.

"FIG. 10A is an isometric view of an embodiment of an adjustable stop.

"FIG. 10B is a side view of the adjustable stop of FIG. 10A.

"FIG. 10C is a top view of the adjustable stop of FIGS. 10A and 10B.

"FIG. 11A is an isometric view of an embodiment of an adjustable stop.

"FIG. 11B is a side view of the adjustable stop of FIG. 11A.

"FIG. 11C is a top view of the adjustable stop of FIGS. 11A and 11B."

For more information, see this patent application: Lavender, Mark. Adjustable Stop for Elongate Medical Device Deflection Mechanism. Filed January 17, 2013 and posted July 24, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=1318&p=27&f=G&l=50&d=PG01&S1=20140717.PD.&OS=PD/20140717&RS=PD/20140717

Keywords for this news article include: St. Jude Medical Atrial Fibrillation Division Inc.

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Source: Politics & Government Week


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