Adjustable Medical Devices

Abstract

To provide a medical device that can be delivered in a first configuration having flexibility and then locked into a second configuration of being rigid.SOLUTION: A device 140 includes an elongated body including a plurality of slot openings 142 along a bendable portion of the body. By using a tensile member for shortening a distance between two points along the elongated body, the device is curved. The device may be locked so as to have a curved configuration. The device may be used as a dock for fixing a valve prosthesis during a delivery valve restoration procedure or a mitral valve replacement procedure.SELECTED DRAWING: Figure 1E

Description

[Technical Field]

[0001] cross reference

[0001] This PCT application claims the benefit of U.S. Provisional Patent Application No. 62 / 748,162, entitled "Adjustable Medical Device," filed October 19, 2018, which is incorporated herein by reference in its entirety for all purposes.

[0002]

[0002] The subject matter of this application is "Prosthetic Cardiac U.S. Provisional Patent Application No. 62 / 720,853, entitled "Prosthetic Cardiac Valve Devices, Systems, and Methods," filed August 21, 2019; U.S. Provisional Patent Application No. 16 / 546,901, entitled "Prosthetic Cardiac Valve Devices, Systems, and Methods," filed October 5, 2018; U.S. Provisional Patent Application No. 62 / 742,043, entitled "Prosthetic Cardiac Valve Devices, Systems, and Methods," filed November 5, 2018; U.S. Provisional Patent Application No. 62 / 755,996, entitled "Prosthetic Cardiac Valve Devices, Systems, and Methods," filed October 7, 2019; U.S. Provisional Patent Application No. 16 / 594,946, entitled "Prosthetic Cardiac Valve Devices, Systems, and Methods," filed December 21, 2018; U.S. Provisional Patent Application No. 62 / 784,280, entitled "Prosthetic Cardiac Valve Devices, Systems, and Methods," filed March 5, 2019; U.S. Provisional Patent Application No. 62 / 813,963, entitled "Prosthetic Cardiac Valve Devices, Systems, and Methods," filed March 8, 2019; U.S. Provisional Patent Application No. 62 / 815,791, entitled "Prosthetic Cardiac Valve Delivery Devices, Systems, and Methods," filed March 19, 2019; U.S. Provisional Patent Application No. 62 / 820,570, entitled "Prosthetic Cardiac Valve Devices, Systems, and Methods," filed April 3, 2019; U.S. Provisional Patent Application No. 62 / 828,835, entitled "Minimal Frame Prosthetic Cardiac Valve Delivery Devices, Systems, and Methods," filed April 12, 2019; U.S. Provisional Patent Application No. 62 / 833,425, entitled "Prosthetic Cardiac Valve Delivery Devices, Systems, and Methods," filed April 12, 2019; U.S. Provisional Patent Application No. 62 / 833,430, entitled "Prosthetic Cardiac Valve Delivery Devices, Systems, and Methods," filed April 12, 2019; U.S. Provisional Patent Application No. 62 / 851,245, entitled "Prosthetic Cardiac Valve Devices, Systems, and Methods," filed May 22, 2019; U.S. Provisional Patent Application No. 62 / 851,245, entitled "Prosthetic Cardiac Valve Devices, Systems, and Methods," filed July 9, 2019 U.S. Provisional Patent Application No. 62 / 872,016, entitled "Devices, Systems, and Methods," filed July 12, 2019; U.S. Provisional Patent Application No. 62 / 873,454, entitled "Systems, Methods, and Devices for Expandable Sensors," filed July 29, 2019; and U.S. Provisional Patent Application No. 62 / 873,454, entitled "Prosthetic Cardiac Valve Devices, Systems, and Methods," filed July 29, 2019. No. 62 / 879,979, entitled "Prosthetic Cardiac Valve Devices, Systems, and Methods," filed August 30, 2019; and U.S. Provisional Patent Application No. 62 / 894,565, entitled "Prosthetic Cardiac Valve Devices, Systems, and Methods," filed August 30, 2019. [Background technology]

[0003]

[0003] Shape memory devices are commonly used for minimally invasive medical procedures due to their ability to return to a desired configuration when released from a delivery device (in which they are typically constrained as a narrow-profile delivery structure). However, many shape memory devices require special delivery devices and methods to maintain the device in a delivery configuration that enables minimally invasive delivery to the target tissue, which may not be ideal. In addition, shape memory devices may not be strong enough to be applied in certain medical procedures that may otherwise be available for minimally invasive techniques. Summary of the Invention [Problem to be solved by the invention]

[0004]

[0004] It would therefore be desirable to provide a medical device that can be transitioned from a small delivery configuration to a larger delivered configuration while minimizing the need for special delivery devices or methods, and / or that can have greater strength than some commonly used shape memory devices. Not all of these aspects or advantages may be achieved by any particular embodiment. Thus, various embodiments may be implemented in a manner that achieves or optimizes one advantage or group of advantages taught herein without necessarily achieving other aspects or advantages that may also be taught or suggested herein. [Means for solving the problem]

[0005]

[0005] The present disclosure relates generally to medical devices, and more particularly to elongated medical devices that can be transitioned from a lower profile delivery configuration to a larger profile delivered configuration.

[0006] In a first aspect, a medical device is provided, the device comprising: an elongate body having a first configuration and a second configuration, the second configuration having a different shape than the first configuration; a shape-changing structure on the elongate body configured to enable the elongate body to change shape from the first configuration to the second configuration; and a locking mechanism configured to lock the elongate body in the second configuration.

[0007] In another aspect, a medical device is provided comprising: an elongate body; a spine portion extending along a sidewall of the elongate body; a plurality of openings extending from the spine portion; a shuttle axially movable along the elongate body; a tensioning member connecting the shuttle to a connection point disposed distally of the shuttle; a pulling member extending proximally from the shuttle; and a locking mechanism configured to hold the shuttle in a proximally retracted position, wherein the medical device has a relaxed configuration before the shuttle is retracted proximally and a stiffened configuration after the shuttle is retracted proximally, the stiffened configuration causing the medical device to assume a predetermined curved configuration, and the plurality of openings are configured to have a first shape in the relaxed configuration and a second shape in the stiffened configuration that is different from the first shape.

[0008] In some embodiments, the width of the opening varies between the first shape and the second shape. The radius of curvature of the predetermined curved configuration may be determined by the width of the opening. In some embodiments, the plurality of openings includes openings of different sizes. The spine portion may extend from at least one of the elongate body and the second shape. In some embodiments, the spine portion is configured in a helical pattern around the elongate body. The pitch or coil angle alpha of a given curved configuration can be determined by the pitch or coil angle of the spine portion. Alternatively, the spine can be straight, or the slot can be angled relative to the spine. The device can include a second connection point proximal to the connection point and a second wire connecting the second connection point to a second shuttle disposed proximal to the second connection point. In some embodiments, the device includes multiple shuttles and multiple locking mechanisms. In some embodiments, the locking mechanism includes a pin attached to the shuttle that is disposed in and configured to slide along a track extending along the length of the elongate body. The track can be twisted as it extends proximally, thereby forming a locking region for the pin. In some embodiments, the elongate body further includes a release window configured to allow the pull member to disengage from the shuttle. The device can be configured to expose the pull member to the release window when the pin is moved to the locking region. In some embodiments, the locking mechanism comprises a flexible threaded portion disposed proximally on the shuttle, the flexible threaded portion configured to thread onto the shuttle or onto a component attached to the shuttle. The flexible threaded portion may be configured to thread onto a spring attached to the shuttle. In some embodiments, the flexible threaded portion is configured to thread onto a clip attached to the shuttle. The device may be configured to be delivered by a catheter. In some embodiments, a central portion of the device is configured to allow a guidewire to be passed therethrough. The device may comprise a catheter through which a medical device may be inserted. In some embodiments, the device is configured to be connected to the end of a catheter.

[0009] In another aspect, a method of deploying a medical device is provided, the method including: advancing an elongate medical device to a target site within a patient's body, the medical device including a plurality of openings extending from a spine portion of a wall of an anchor, the medical device being advanced in a first, relaxed configuration; moving the medical device to a rigid configuration by proximally pulling a shuttle movable along the medical device, whereby a tension member connecting the shuttle to a distal connection point pulls the distal connection point proximally; and locking the medical device in a rigid working configuration, the working configuration having a predetermined curved shape.

[0010] In some embodiments, the method including actuating the anchor includes pulling a tensioning member attached to the shuttle proximally while maintaining a position of the proximal end of the anchor. Locking the anchor can include moving a pin along a track to a stop position. In some embodiments, locking the anchor includes threading a screw into a component attached to the shuttle.

[0011] In some embodiments, the target site includes a native valve within a heart within the patient's body. In some embodiments, the method further includes advancing an elongate medical device from a first side of the native valve to a second side of the native valve.

[0012] In some embodiments, the method further includes capturing one or more structures on a second side of the native valve with the elongate medical device in the first relaxed configuration prior to moving the elongate medical device to the stiffened configuration. In some embodiments, the native valve includes a mitral valve, the first side includes the left atrium, the second side includes the left ventricle, and the one or more structures include one or more chordae tendineae or native leaflets.

[0013] In some embodiments, the method further comprises automatically moving the medical device to the rigidized configuration after the medical device has been moved to the rigidized configuration. The method further includes inflating at least a portion of the inflatable valve prosthesis within at least a portion of the elongate medical device adjacent to the native valve, thereby securing the valve prosthesis relative to the native valve. Inflating the valve prosthesis can capture one or more structures of the native valve between the valve prosthesis and the elongate medical device. In some embodiments, the native valve includes the mitral valve, the first side includes the left atrium, the second side includes the left ventricle, and the one or more structures include one or more chordae tendineae or natural leaflets.

[0014] In another aspect, a method of advancing a medical device to a target site is provided. The method includes advancing an elongate body toward the target site and out of a distal end of a delivery catheter, the elongate body having a first curved shape as the elongate body is advanced toward the target site; locking at least a portion of the elongate body into the first curved shape; moving the elongate body to a second curved shape at or near the target site, the second curved shape being different from the first curved shape; and locking the elongate body into the second curved shape. For example, a distal portion of the device may be curved during navigation from the distal end of the delivery catheter to the target site. At or near the target site, a larger or another portion of the device may be locked into a desired final shape. In an alternative embodiment, the elongate body is delivered out of the delivery catheter such that the elongate body conforms to the shape of the delivery catheter and is locked into its curved delivery shape when delivered to the target site.

[0015] In another aspect, an anchor for use in transcatheter mitral valve repair is provided, the anchor comprising: an elongate body; a spine portion along a sidewall of the elongate body; a plurality of apertures extending from the spine portion; a connection point secured to the elongate body; a shuttle disposed proximal to the connection point and axially movable along the elongate body; a wire connecting the connection point and the shuttle; a pull member extending proximally from the shuttle; and a locking mechanism for holding the shuttle in a proximally retracted position that causes the anchor to assume a predetermined curved configuration.

[0016] In some embodiments, the spine portion is configured to traverse a helical path around the elongate body. In other embodiments, the slot is angled relative to the spine. The anchor can include a second connection point proximal to the connection point and a second wire connecting the second connection point to a second shuttle disposed proximal to the second connection point.

[0017] In another aspect, a method for performing transcatheter mitral valve repair is provided. The method includes advancing a guidewire or guide catheter through an opening in the atrial septum and across a location near the anteromedial connection; advancing an elongated anchor over the guidewire, the elongated anchor having multiple openings extending from a spine portion of a side wall of the anchor, such that the anchor forms at least one coil around the chordae and forms one coil in the left atrium, the anchor being advanced in a first, relaxed configuration; actuating the anchor to a stiffened configuration having a predetermined curved shape by pulling proximally a shuttle movable along the anchor, whereby a wire connecting the shuttle to a distal connection point pulls the distal connection point proximally; and locking the anchor in the stiffened configuration. In some embodiments, the anchor is delivered around the chordae and / or leaflets. In the stiffened configuration, the anchor can be tightened around the chordae and / or leaflets.

[0018] In another aspect, a device for performing non-occlusive ablation is provided, the device comprising: an elongate body; a spine portion along the sidewall of the elongate body; a plurality of openings extending from the spine portion; a connection point secured to the elongate body; a shuttle positioned proximal to the connection point and movable axially along the elongate body; a tension member connecting the connection point and the shuttle; a pulling member extending proximally from the shuttle; and a locking mechanism for holding the shuttle in a proximally retracted position that causes the device to assume a predetermined curved configuration.

[0019] In another aspect, a method for performing non-occlusive ablation is provided. The method includes advancing an elongated ablation device, the ablation device having a plurality of openings extending from a spine portion of a sidewall of the ablation device, through the vasculature to a target site to be ablated, wherein the ablation device is advanced in a first, relaxed configuration; moving the device to a stiffened configuration having a predetermined curved shape by proximally pulling a shuttle movable along the device, whereby a wire connecting the shuttle to a distal connection point pulls the distal connection point proximally; and energizing one or more electrodes disposed along the device to ablate tissue near the device. In some embodiments, when the device is in the stiffened configuration, the spine portion is in an outermost position. The spine portion can comprise an electrode. In some embodiments, the entire spine portion can comprise metal and function as an electrode.

[0020] In some embodiments, the method includes locking the device in a rigid configuration. The method includes placing the device in contact with a tissue site to be ablated. In some embodiments, locking the ablation device causes one or more electrodes to contact the target site. Incorporation by Reference

[0021] All publications and patent applications mentioned in this specification are herein incorporated by reference in their entirety to the same extent as if each individual publication or patent application was specifically and individually indicated to be incorporated by reference.

[0021]

[0022] The novel features of the present disclosure are set forth with particularity in the appended claims. A better understanding of the features and advantages of the present disclosure will be obtained by reference to the following detailed description that sets forth illustrative embodiments, in which the principles of the disclosure are utilized, and the accompanying drawings in which: [Brief explanation of the drawings]

[0022] [Figure 1A]

[0023] 1A-1C are side views illustrating an adjustable medical device having an undeployed configuration and a deployed configuration according to an embodiment of the present disclosure. [Figure 1B] 1A-1C are top views illustrating an adjustable medical device having an undeployed configuration and a deployed configuration according to an embodiment of the present disclosure. [Figure 1C]

[0024] 1A-1C are side views illustrating an adjustable medical device in a relaxed configuration and a stiffened configuration according to an embodiment of the present disclosure. [Figure 1D] 1A-1C are perspective views illustrating an adjustable medical device in a relaxed configuration and a stiffened configuration according to an embodiment of the present disclosure. [Figure 1E] 1A-1C are perspective views illustrating an adjustable medical device in a relaxed configuration and a stiffened configuration according to an embodiment of the present disclosure. [Figure 2A]

[0025] FIG. 2A is a perspective view showing a locking mechanism on an adjustable medical device according to an embodiment of the present disclosure. [Figure 2B] FIG. 2B is a cross-sectional view showing a locking mechanism on an adjustable medical device according to an embodiment of the present disclosure. [Figure 3A]

[0026] FIG. 3A is an enlarged side view of a lock and release mechanism on an adjustable medical device according to an embodiment of the present disclosure. [Figure 3B] FIG. 3B is an enlarged side view of a lock and release mechanism on an adjustable medical device according to an embodiment of the present disclosure. [Figure 3C] FIG. 3C is an enlarged side view of a lock and release mechanism on an adjustable medical device according to an embodiment of the present disclosure. [Figure 3D] FIG. 3D is an enlarged side view of a lock and release mechanism on an adjustable medical device according to an embodiment of the present disclosure. [Figure 3E] FIG. 3E is an enlarged side view of a lock and release mechanism on an adjustable medical device according to an embodiment of the present disclosure. [Figure 3F] FIG. 3F is an enlarged side view of a lock and release mechanism on an adjustable medical device according to an embodiment of the present disclosure. [Figure 4A]

[0027] 4A-4D are schematic diagrams illustrating various embodiments of shape-changing structures for adjustable medical devices, according to embodiments of the present disclosure. [Figure 4B] 4A and 4B are schematic diagrams illustrating various embodiments of shape-changing structures for adjustable medical devices, according to embodiments of the present disclosure. [Figure 4C] 4A-4C are schematic diagrams illustrating various embodiments of shape-changing structures for adjustable medical devices, according to embodiments of the present disclosure. [Figure 4D] 4A-4D are schematic diagrams illustrating various embodiments of shape-changing structures for adjustable medical devices, according to embodiments of the present disclosure. [Figure 5A] 5A-5C are schematic diagrams illustrating various embodiments of shape-changing structures for adjustable medical devices, according to embodiments of the present disclosure. [Figure 5B] 5A and 5B are schematic diagrams illustrating various embodiments of shape-changing structures for adjustable medical devices, according to embodiments of the present disclosure. [Figure 5C] 5A-5C are schematic diagrams illustrating various embodiments of shape-changing structures for adjustable medical devices according to embodiments of the present disclosure. [Figure 5D]5A-5D are schematic diagrams illustrating various embodiments of shape-changing structures for adjustable medical devices, according to embodiments of the present disclosure. [Figure 6]

[0028] FIG. 10 is a perspective view illustrating another adjustable medical device according to an embodiment of the present disclosure. [Figure 7A]

[0029] 1 is a cross-sectional view of the left side of the heart illustrating a method of deploying an adjustable medical device at the mitral valve according to an embodiment of the present disclosure. [Figure 7B] 1 is a cross-sectional view of the left side of the heart illustrating a method of deploying an adjustable medical device at the mitral valve according to an embodiment of the present disclosure. [Figure 7C] 1 is a cross-sectional view of the left side of the heart illustrating a method of deploying an adjustable medical device at the mitral valve according to an embodiment of the present disclosure. [Figure 7D] 1 is a cross-sectional view of the left side of the heart illustrating a method of deploying an adjustable medical device at the mitral valve according to an embodiment of the present disclosure. [Figure 7E] 1 is a cross-sectional view of the left side of the heart illustrating a method of deploying an adjustable medical device at the mitral valve according to an embodiment of the present disclosure. [Figure 8A]

[0030] 10 is a cross-sectional view of the left side of the heart illustrating another embodiment of a method of deploying an adjustable medical device at the mitral valve in accordance with an embodiment of the present disclosure. [Figure 8B] 10 is a cross-sectional view of the left side of the heart illustrating another embodiment of a method of deploying an adjustable medical device at the mitral valve in accordance with an embodiment of the present disclosure. [Figure 8C] 10 is a cross-sectional view of the left side of the heart illustrating another embodiment of a method of deploying an adjustable medical device at the mitral valve in accordance with an embodiment of the present disclosure. [Figure 8D] 10 is a cross-sectional view of the left side of the heart illustrating another embodiment of a method of deploying an adjustable medical device at the mitral valve in accordance with an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0023]

[0031] In the following detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, like symbols generally refer to like elements unless otherwise specified. The illustrative embodiments described in the detailed description, drawings, and claims are not intended to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the scope of the subject matter presented herein. It will be readily understood that the aspects of the present disclosure, as generally described and illustrated in the Figures herein, can be arranged, substituted, combined, separated, and designed in a wide variety of different configurations, all of which are expressly contemplated herein.

[0024]

[0032] Although specific embodiments and examples are disclosed below, the subject matter of the present invention extends in scope beyond the specifically disclosed embodiments to other alternative embodiments and / or uses, as well as to modifications and equivalents thereof. Accordingly, the claims appended hereto are not limited by any of the specific embodiments described below. For example, in any methods and processes disclosed herein, the acts and operations of the method or process may be performed in any suitable order and are not necessarily limited to any specifically disclosed order. Also, while various operations may be described as multiple specific operations in a manner that may be useful in understanding a particular embodiment, the order of description should not be construed to imply that these operations are order-dependent. Additionally, the structures, systems, and / or devices described herein may be embodied as integrated or separate components.

[0025]

[0033] For purposes of comparing various embodiments, certain aspects and advantages of these embodiments are described. Not all of these aspects or advantages are necessarily achieved by any particular embodiment. Thus, for example, various embodiments may be implemented in a manner that achieves or optimizes one advantage or group of advantages taught herein without necessarily achieving other aspects or advantages that may also be taught or suggested herein.

[0026]

[0034] Provided herein are embodiments of adjustable medical devices. The devices can have a relaxed configuration and one or more stiffened configurations, where the stiffened configurations have a predetermined curved shape. The devices can be locked into the stiffened configurations. For example, in some embodiments, the devices are percutaneously advanced to a target site within a patient in a relaxed or loose configuration. Once the device is deployed at or within the target site, the device can be locked into the stiffened configuration having a predetermined curved shape. Such devices can be used in many different applications, as described below.

[0027]

[0035] FIG. 1A depicts an embodiment of an adjustable medical device 100 in an undeployed (or unexpanded) linear configuration 100a. The device 100 can comprise an elongated body. For example, in some embodiments, the device 100 comprises an elongated tubular body. The device 100 can be configured to be delivered percutaneously through or at the end of a catheter. The device 100 can include a spine portion 1 The device 100 includes a plurality of slot openings 102 surrounding or extending from the spine portion 108. The portion of the device 100 including the openings 102 is the folding portion 105 of the device 100. The spine portion 108 of the device may be defined by an area of ​​the bending portion 105 of the device 100 that does not have any openings 102. The folding portion 105 folds, allowing the device 100 to bend at the spine portion 108 of the device 100. In some embodiments, the spine portion 108 may be thin, e.g., having a width of about 0-10% of the circumference of the elongate body. In other embodiments, the spine portion 108 may be wider, e.g., having a width greater than about 10% of the circumference of the elongate body. In some embodiments, the openings 102 surrounding the spine portion 108 are wedge-shaped. Other configurations for the openings are possible as described herein (e.g., slit-shaped, circular, etc.). In some embodiments, device 100 may be formed from a hypotube. Aperture 102 may be formed by laser irradiation, as will be understood by those skilled in the art based on the description herein. The openings 102 may be formed by cutting, blades, or the like. In some embodiments, the device 100 may include a flexible jacket or sleeve (e.g., a polymer jacket). The jacket may help protect the surrounding tissue from trauma that may be caused by the openings 102 when the device 100 is bent.

[0028]

[0036] The shape or amount of bending of device 100 in stiffened configuration 100b is defined by the difference in length between the outer edge of the curved portion (spine portion 108) that includes opening 102 and the inner edge of the curved portion. This difference in length is determined by the width of opening 102, and the sum of the widths of openings 102 defines the difference in length between the inner and outer edges of the curved portion.

[0029]

[0037] The device 100 may include a plug 112 disposed at a distal portion of the device 100. A tension member 106 (e.g., a wire, elastic wire, spring, etc.) may connect the plug 112 and the shuttle 104. The tension member 106 may maintain the length of the inner diameter of the curved portion of the device 100 when at its minimum length. Based on this description, one of ordinary skill in the art will recognize that in some embodiments, the device need not include the plug 112, and the tension member 106 may be connected to another distal point on the device 100 by another means. The shuttle 104 is axially movable along the length of the device 100. In some embodiments, the shuttle 104 may comprise a cylinder. Other configurations are possible (e.g., spherical, elliptical, rectangular, etc.), as will be understood by one of ordinary skill in the art based on this description. The shuttle 104 may be movable within the device 100, movable on the device 100, or movable partially within and on the device 100. A pulling member 110 (e.g., a wire, rod, etc.) can extend proximally from the shuttle 104, allowing the shuttle 104 to be pulled proximally while the proximal end of the device 100 is held or pushed distally, thereby shortening the distance between the shuttle 104 and the proximal end of the device 100. Alternatively, the proximal end of the device 100 can be pushed distally while the shuttle 104 and / or pulling member 110 are held in place. The amount of reduction in the distance between the shuttle 104 and the proximal end of the device 100 can define a minimum length of the inner diameter surface of the device 100.

[0030]

[0038] A pulling member 110 can be used to pull the shuttle 104 proximally in the direction indicated by arrow 114. Proximal movement of the shuttle 104 can change the shape of the opening 102. Proximal movement of the shuttle 104 can decrease the width of the opening 102, shortening the side of the device 100 that is disposed away from the spine 108. Shortening one side of the device 100 causes the device 100 to curve away from the spine portion 108, as shown in FIG. 1B.

[0031]

[0039] In the stiffened configuration 100b, the device 100 can have a variety of shapes. For example, the device 100 shown in FIG. 1A can be deformed to assume the shape of a portion of a circle, as shown in FIG. 1B. In some embodiments, the device 100 comprises a helical-shaped device 140 in the stiffened configurations 100a, 140a, as shown in FIGS. 1C and 1D. The helical shape can have a coil angle α and a pitch p. The coil angle α and the coil pitch p of the device 140 in the stiffened configuration 140b can be determined by the angle and pitch of the spine portion 108 of the device 140. The device 140 can have any combination of spiral, conical, frustoconical, helical, etc. As shown in the device 140 in FIGS. 1C and 1D, the openings 142 can be positioned at an angle relative to the spine 108 to facilitate the formation of a helical coil.

[0032]

[0040] FIG. 1D shows the configuration of a straight, relaxed configuration 140a and a coiled, stiffened configuration 140b. 1E shows a magnified view of the portion of FIG. 1D shown in section A. The slots or openings 142 are shown open in a straight, relaxed configuration 140a. In a coiled, stiffened configuration 140b, the slots or openings 142 can be folded (in other words, collapsed), thereby allowing the device 100 to bend.

[0033]

[0041] The device 100 can include a locking mechanism for locking (i.e., latching) the shuttle 104 in the proximally retracted position. FIGS. 2A and 2B illustrate an embodiment of a locking mechanism 200. FIG. 2A illustrates an exterior view of the device 100. FIG. 2B illustrates a cutaway view of the device 100, showing the shuttle 104 within the device 100. The locking mechanism 200 can include a track 202. A pin 204 can be attached to the shuttle 104 and configured to slide along the track 202. The track 202 can connect to a slot or opening 206 in a distal wall against which the pin 204 can rest, thereby preventing distal movement of the pin 204 and locking the shuttle 104 in place. Other locking mechanisms 200 are also possible. For example, the shuttle 104 can be locked in place using a flexible thread extending over the top of the shuttle 104. The flexible threaded portion can be configured to thread into the anchor portion (e.g., plug 112) of device 100. Turning the flexible threaded portion can move shuttle 104 toward or away from the anchor. The flexible threaded portion can extend along the length of spine portion 108. Because spine 108 maintains its length between the collapsed and rigid configurations, the flexible threaded portion cannot extend out of the anchor when in the stiffened configuration. In other embodiments, a threaded portion and clip mechanism can be used.

[0034]

[0042] 3A-3B show detailed views of a locking mechanism 300 similar to locking mechanism 200, further including a disengagement structure configured to allow the pulling member 110 to disengage from the shuttle 104 when the shuttle 104 is pulled to the locked position. FIGS. 3A and 3B show the device 100 with the shuttle 104 pulled proximally along the track 202 but not yet positioned in the locked position. FIG. 3A shows the track 202 and the locking opening 206. FIG. 3B shows a release window 302 positioned at a different portion of the device 100. Once the pin 204 is moved into the locking opening 206, the shuttle 104 can be twisted, as shown in FIGS. 3C and 3D. Twisting the shuttle 104 can position the connection between the shuttle 104 and the pulling member 110 within the release window 302, as shown in FIG. 3D. The connection can include an aperture 304 on the pulling member 110 that is engaged with a pin 306 on the shuttle 104. The aperture 304, engaged with the pin 306, can be moved to a release window 302 to disengage the pulling member 110 from the shuttle 104. Figures 3E and 3F show the device 100 after the pulling member 110 has been disengaged and retracted.

[0035]

[0043] Various factors can affect the radius of curvature of the device 100 in the locked or stiffened configuration 100b. For example, the configuration of the spine 108 can affect the configuration of the fixed curvature. The spine 108 coiled around the device 100 can create a locked device having a helical configuration. The coil angle and pitch of the spine portion 108 can determine the shape of the stiffened device, as described herein.

[0036]

[0044] As noted above, the radius of curvature may be determined by the total width of the openings. For example, Figures 4A and 4B show a device 400 with an opening 402 that is narrower than the opening 412 shown in device 410 of Figures 4C and 4D. The device 410 with the wider opening 412 has a larger curvature than the device 400 (Figure 4B) with the smaller opening 402. It has a deeper curved portion (smaller radius of curvature) (Figure 4D).

[0037]

[0045] The density of the openings, or frequency of the openings along the length of the device, can also determine the radius of curvature of the device, since devices with a higher density of openings have a greater total width of the openings. Figures 5A and 5B show a device 500 with fewer openings 502 than the device 510 of Figures 5C and 5D. The device 510 with a higher density of openings 512 has a larger radius of curvature (Figure 5D) than the device 500 with a lower density of openings 502 (Figure 5B).

[0038]

[0046] Any of the devices described herein (e.g., 100, 140, 400, 410, 500, 510) can have any number, shape, or density of openings (e.g., 102, 142, 402, 412, 502, 512) as desired.

[0039]

[0047] In some embodiments, device 100 can include multiple locking mechanisms 602 along the length of device 100, as shown in FIG. 6 . In such a device 100, multiple shuttles, tensioning members, and locking mechanisms can be used to separately and / or independently stiffen and lock various bending portions of device 100. Each bending portion can include a proximal anchor portion with a locking mechanism (e.g., similar to locking portion 206 in FIGS. 2A-2B ) that can be positioned to contact a corresponding shuttle, thereby bending the corresponding bending portion. In some embodiments, such configurations can be used to sequentially lock multiple portions of device 100 and / or achieve more complex stiffening configurations. For example, the deployed portion can be stiffened and locked as device 100 is deployed from a delivery catheter. This sequential locking can be performed manually by a clinician or, alternatively, by an automated system (e.g., a delivery system). In some embodiments, the act of exposing device 100, or relative motion between the delivery catheter and device 100, can curve and lock the exposed portion. In some embodiments, a portion of device 100 can have a first shape for delivery and a different second shape upon deployment. For example, the tip of device 100 can be curved during delivery to aid in navigation. Device 100 can be stiffened to different shapes upon deployment. In some embodiments, multiple shuttles are used with different locking mechanisms. In other embodiments, one shuttle can be locked in different positions, thereby curving different portions of device 100. Allowing device 100 to be sequentially stiffened in this manner can allow device 100 to shape the path it follows after exiting the delivery catheter, thereby reducing the need for a guidewire or guide catheter.

[0040]

[0048] In some embodiments, device 100 can be used as a dock to secure a valve prosthesis during a delivery valve repair or mitral valve replacement procedure, as shown in Figures 7A-7E. Figure 7A shows a delivery catheter 702 positioned through the interatrial septum after a transseptal puncture. A guidewire 704 is delivered through delivery catheter 720 at or near the anterior commissure, as shown in Figure 7B. The device 100 may be inserted through a tissue into the heart. A guidewire 704 may be advanced to coil around the chordae tendineae in the left ventricle, as shown in Figures 7B and 7C. Device 100, or any of the devices described herein, may then be advanced through catheter 702 and over guidewire 704, as shown in Figure 7D. Device 100 may be inserted in a relaxed configuration 100a. During delivery to the chordae tendineae, the shape of device 100 may mimic the guidewire 704. Once device 100 is deployed around the chordae tendineae, device 100 is shown in Figure 7E. As shown, device 100 can form a helical shape in stiffened configuration 100b, where at least one coil resides around the chordae tendineae of the left ventricle and one coil resides in the left atrium. In some embodiments, device 100 can be located entirely within the left ventricle, where no coils are seated within the left ventricle after deployment. Once device 100 is in place, guidewire 704 can be retracted. In some embodiments, device 100 can include multiple bends, as described above in connection with FIG. 6 . Retraction of guidewire 704 from device 100 can be regulated via locking device 100, whereby device 100 is locked into the appropriate shape from its distal end toward its proximal end as the distal tip of guidewire 704 moves from its distal end toward its proximal end upon retraction. Nos. 16 / 594,946 and 16 / 546,901, as well as U.S. Provisional Patent Application Nos. 62 / 720,853, 62 / 742,043, 62 / 755,996, 62 / 784,280, 62 / 813,963, 62 / 815,791, 62 / 820,570, and 62 / 821,571, which are previously incorporated by reference herein for all purposes. As described in U.S. Provisional Patent Application Nos. 62 / 828,835, 62 / 833,425, 62 / 833,430, 62 / 851,245, 62 / 872,016, 62 / 873,454, 62 / 879,979, and 62 / 894,565, after device 100 is deployed, a valve prosthesis (not shown) may be delivered to and secured to the mitral valve using device 100.

[0041]

[0049] 8A-8D illustrate a method similar to that shown in FIGS. 7A-7E, except that device 100 is deployed through a guide catheter 806 rather than over a guidewire 802. FIG. 8A illustrates a delivery catheter 806 positioned through the interatrial septum after a transseptal puncture. In this case, guidewire 802 may be inserted through tissue at or near the anterior commissure and advanced to form a coil around the chordae tendineae within the left ventricle, as shown in FIG. 8A. Guide catheter 806 may be advanced over guidewire 802, as shown in FIG. 8B. Guidewire 802 may then be retracted. Device 100 may then be advanced through guide catheter 806, as shown in FIG. 8B. Guide catheter 806 may then be retracted, as shown in FIG. 8C. As shown in FIG. 7E, device 100 can form a helical shape in the stiffened configuration, where at least one coil resides around the chordae tendineae in the left ventricle and one coil resides in the left atrium. In some embodiments, device 100 can be located entirely in the left ventricle, where no coils are seated in the left atrium after deployment. Once device 100 is in place, guide catheter 806 can be retracted. In some embodiments, device 100 can include multiple bends, as described above in connection with FIG. 6. Retraction of guide catheter 806 from device 100 can be regulated via locking device 100, whereby device 100 is locked into the proper shape from its distal end toward its proximal end as the distal tip of guide catheter 806 moves from the distal end toward the proximal end of device 100 upon retraction.U.S. Patent Application Nos. 16 / 594,946 and 16 / 546,901, and U.S. Provisional Patent Application Nos. 62 / 720,853, 62 / 742,043, 62 / 755,996, 62 / 784,280, 62 / 813,963, 62 / 815,791, 62 / 820,570, 62 / 828,835, 62 / 833,425, 62 / 833,430, and 62 / 851,245, which are previously incorporated by reference herein for all purposes. No. 62 / 872,016, U.S. Provisional Patent Application No. 62 / 873,454, U.S. Provisional Patent Application No. 62 / 879,979, and U.S. Provisional Patent Application No. 62 / 894,565, after device 100 is deployed, a valve prosthesis (not shown) may be delivered to and secured to the mitral valve using device 100.

[0042]

[0050] It will be appreciated that device 100 may be used in other configurations. For example, in some embodiments, device 100 may be used for non-occlusive ablation. Device 100 may be advanced to the area to be treated in a relaxed or relaxed configuration. Once device 100 reaches the target site, device 100 may be locked into a stiffened configuration. In some embodiments, device 100 may be moved to the stiffened configuration without actually being locked in place. Instead, device 100 may be held in the stiffened configuration during ablation and then released, allowing device 100 to be moved to another ablation site or for device 100 to be retracted. The stiffened configuration may have a predetermined curved portion configured to contact device 100 against the area to be ablated. For example, device 100 may be configured to form a coil at the periphery of a blood vessel. The shape of the curved portion may be selected to ensure good contact between device 100 and the area to be ablated. In the stiffened configuration, spine portion 108 may be the outermost portion of device 100. Device 100 can include at least one electrode (e.g., 1, 2, 3, 4, 5, 6, 7, 8, or more electrodes) that can be positioned to contact the area to be ablated in the stiffened configuration. In some embodiments, at least a portion of device 100 itself (e.g., spine portion 108) can include metal and function as an electrode. In some embodiments, such as when device 100 is used for non-occlusive ablation, device 100 can include a lumen through which blood can flow.

[0043]

[0051] In some embodiments, device 100 can be used within an anchor for an infection protection device, such as a filter for use during an interventional cardiac procedure. Advantageously, device 100 can be delivered with a small profile (i.e., cross-sectional outline) and deployed in a larger, desired shape. The devices described herein can have several advantages over shape memory devices that are delivered in a relaxed configuration and can assume a deployed shape after delivery. The devices described herein can have greater stiffness and strength in the deployed position compared to shape memory devices in the deployed position. Shape memory devices with a deployed configuration (e.g., a coil) that has a diameter significantly larger than the delivery configuration must be delivered in a catheter with sufficient strength to maintain the shape memory device in a straight configuration during delivery because the shape memory device is biased toward the larger diameter configuration. The devices of the present application are not biased during delivery and do not require a strong or thick catheter to hold them in place during delivery.

[0044]

[0052] When a structure or element is referred to herein as being "on" another structure or element, the structure or element may be directly on the other structure or element, or there may be intervening structures and / or elements. In contrast, when a structure or element is referred to as being "directly on" another structure or element, there are no intervening structures or elements. Also, when a structure or element is referred to as being "connected," "attached," or "coupled" to another structure or element, it should be understood that the structure or element may be directly connected, attached, or coupled to the other structure or element, or there may be intervening structures or elements. In contrast, when a structure or element is referred to as being "directly connected," "directly attached," or "directly coupled" to another structure or element, there are no intervening structures or elements. Although described or illustrated in connection with one embodiment, such Structures and elements described or shown in the figures may be applicable to other embodiments. Also, those skilled in the art will recognize that references to a structure or structure disposed "adjacent" another structure can include portions that overlie or underlie the adjacent structure.

[0045]

[0053] The terminology described herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present invention. For example, as used herein, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly dictates otherwise. It should be further understood that the terms "comprises" and / or "comprising," as used herein, specify the presence of stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The term "and / or," as used herein, includes any and all combinations of one or more of the associated listed items and may be represented shorthand as " / ."

[0046]

[0054] Spatial relationship terms such as "below," "below," "lower," "above," and "upper" may be used herein for ease of description to describe the relationship of one element or structure to another element or structure, as shown in the figures. It should be understood that these spatial relationship terms are intended to encompass other orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures were inverted, an element described as "below" or "below" another element or feature would be oriented "above" the other element or structure. Thus, the exemplary term "below" can encompass both an orientation of above and below. A device may be otherwise oriented (e.g., rotated 90 degrees or otherwise oriented), and the spatial relationship descriptors used herein will be interpreted accordingly. Similarly, terms such as "upward," "downward," "vertical," and "horizontal" are used herein for descriptive purposes only, unless expressly stated otherwise.

[0047]

[0055] Although the terms "first" and "second" may be used herein to describe various structures / elements (including steps), these structures / elements should not be limited by these terms unless the context indicates otherwise. These terms may be used to distinguish one structure / element from another. Thus, a first structure / element discussed below may be referred to as a second structure / element, and similarly, a second structure / element discussed below may be referred to as a first structure / element, without departing from the teachings of the present invention.

[0048]

[0056] Throughout this specification and the claims that follow, unless the context requires otherwise, the term "comprise," and variations thereof, such as "comprises" and "comprising," mean that various components may be employed together in methods and articles (e.g., configurations and apparatuses, including devices and methods). For example, the term "comprising" will be understood to imply the inclusion of any recited elements or steps, and not the exclusion of any other elements or steps.

[0049]

[0057] All numbers used in this specification and claims, including those used in the examples, unless otherwise expressly stated, can be read as if preceded by the word "about" or "and," even if the word "about" or "approximately" is not explicitly stated. The phrase "about" or "approximately" means that the value and / or The following expressions may be used when describing a size and / or location to indicate that the value or location is within an expected reasonable range of values ​​and locations. For example, numerical values ​​may have values ​​of + / - 0.1% of the stated value (or range of values), + / - 1% of the stated value (or range of values), + / - 2% of the stated value (or range of values), + / - 5% of the stated value (or range of values), + / - 10% of the stated value (or range of values), etc. Also, all numerical values ​​given herein are understood to include approximations or approximations of that numerical value unless otherwise specified. For example, if the value "10" is disclosed, "about 10" is also disclosed. All numerical ranges described herein are intended to include all subranges subsumed therein. When values ​​are disclosed as "less than or equal to" or "greater than" that value, it is understood that all possible ranges between those values ​​are also disclosed, as would be appropriately understood by one of ordinary skill in the art. For example, if a value "X" is disclosed, "less than or equal to X" is also disclosed, as well as "greater than or equal to X" (e.g., where X is a numeric value). It is also understood that throughout this application, data is provided in a number of different formats, and that this data represents endpoints, and starting points, and ranges for any combination of the data points. For example, if a specific data point "10" and a specific data point "15" are disclosed, it is understood that greater than, greater than, less than, less than, less than, and equal to 10, as well as greater than, greater than, less than, less than, less than, less than, and equal to 15, are considered and disclosed, and further disclosed as being between 10 and 15. It is also understood that each number between two specific values ​​is disclosed. For example, if 10 and 15 are disclosed, then 11, 12, 13, and 14 are also disclosed.

[0050]

[0058] While various exemplary embodiments have been described above, any of numerous modifications may be made to the various embodiments without departing from the scope of the invention as set forth in the claims. For example, the order in which various described method steps are performed may often be changed in alternative embodiments, and in other alternative embodiments, one or more method steps may be eliminated altogether. Optional features of various device or system embodiments may be included in some embodiments and not included in other embodiments. Accordingly, the foregoing description is provided primarily for illustrative purposes and should not be construed as limiting the scope of the invention as set forth in the claims.

[0051]

[0059] The examples and illustrations contained herein are for illustration, not limitation, indicating specific embodiments in which the present subject matter may be practiced. As noted, other embodiments may be utilized and obtained, such that structural or logical substitutions and changes may be made without departing from the scope of the present disclosure. These embodiments of the inventive subject matter may be referred to herein individually or collectively by the term "invention" merely for convenience, and are not intended to intentionally limit the scope of this application to only any one invention or inventive concept if more than one is actually disclosed. Thus, while specific embodiments have been shown and described herein, any configuration calculated to achieve the same purpose may be substituted for the specific embodiments shown. The present disclosure is intended to cover any and all adaptations or variations of the various embodiments. Upon reading the above description, combinations of the above embodiments, as well as other embodiments not specifically described herein, will be apparent to those skilled in the art.

[0052]

[0060] While preferred embodiments of the present disclosure have been shown and described herein, it will be apparent to those skilled in the art that these embodiments are provided by way of example only. Numerous modifications, changes, and substitutions will occur to those skilled in the art without departing from the invention. It is understood that various alternatives to the embodiments of the invention described herein may be employed in carrying out the invention. The following claims are intended to define the scope of the invention, and therefore methods and structures within the scope of these claims are also intended to be illustrative, not restrictive. and equivalents thereof.

Claims

1. A medical device, the medical device comprising: an elongate body having a first configuration and a second configuration having a different shape than the first configuration; a plurality of openings disposed in the elongate body that allow the elongate body to change shape from the first configuration to the second configuration; a shuttle axially movable within the elongate body; a tension member connecting the shuttle to a distal portion of the elongate body; a pulling member extending proximally from the shuttle, the pulling member pulling the shuttle proximally along the elongate body to transition the elongate body from the first configuration to the second configuration; a locking mechanism configured to hold the shuttle in a proximally retracted position to lock the elongate body in the second configuration; and Equipped with the locking mechanism comprises a pin attached to the shuttle configured to be disposed in and slide along a track extending along the length of the elongate body; the track twists as it extends proximally, thereby forming a locking region for the pin; the elongate body further comprising a release window configured to allow the tension member to disengage from the shuttle; Medical devices.

2. The medical device of claim 1 , wherein the elongate body is flexible in the first configuration and rigid in the second configuration.

3. The medical device of claim 1 , wherein the locking mechanism is disposed within the elongate body.

4. The medical device of claim 1 , wherein the width of the opening varies between the first configuration and the second configuration.

5. The medical device of claim 1 , wherein the radius of curvature of the second configuration is determined by the width of the opening.

6. The medical device of claim 1 , wherein the plurality of openings comprises openings of different sizes.

7. The medical device of claim 1 , wherein the radius of curvature of the second configuration is determined by the diameter of the elongate body.

8. 10. The medical device of claim 1, further comprising a connection point disposed proximally of the distal portion and a second tension member connecting the connection point to a second shuttle disposed proximally of the connection point.

9. The medical device of claim 1 , comprising multiple shuttles and multiple locking mechanisms.

10. The medical device of claim 1 , wherein the medical device is configured to expose the pull member to the release window when the pin is moved to the locking region.

11. The medical device of claim 1 , wherein the medical device is configured to be delivered by a catheter.

12. The medical device of claim 1 , wherein a central portion of the medical device is configured to allow passage of a guidewire therethrough.

13. The medical device of claim 1 , further comprising a catheter through which the medical device can be inserted.

14. The medical device of claim 1 , wherein the medical device is configured to be connected to the end of a catheter.

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