Patent Application
20220193398
The devices described herein generally relate to lead engagement devices for engaging and facilitating removal of an implanted lead, such as a cardiac implantable electronic device (“CIED”) lead, from a patient's body, and more specifically relate to lead engagement devices providing relatively large areas for engaging implanted leads.
Various medical procedures attach wire-like devices to internal portions of a patient's body, such as an electrical lead for a cardiac implantable electronic device (“CIED”). CIED leads are electrically conductive wires which run to an electrode that is attached to an inner wall of a patient's heart. CIED leads are typically a coil of wire enclosed in an outer cylindrical sheath of electrically insulating material. The coil of wire usually leaves a hollow space running down the center of the CIED lead (a “lumen”).
CIED leads are usually implanted with the intention that they will remain in the patient for several years. During such time, fibrous tissue grows over the electrode and portions of the lead. CIED leads are often provided with additional barb-like structures or a corkscrew type of structure to encourage adhesion to the inner wall of the patient's heart.
CIED leads sometimes need to be removed for a variety of reasons including infection, malfunction, venous occlusion; advisory, etc.
Numerous lead engagement devices have thus been developed that can be inserted into the lumen of a CIED lead and attached to the CIED lead in order to apply traction to the lead. However, these devices typically have a disadvantage that they attach to the CIED lead in a localized area. Applying traction to the CIED lead and/or CIED lead engagement devices can result in the CIED lead becoming distorted and/or breaking before it can be removed from the patient.
Accordingly, it is desirable to provide improved lead engagement devices.
The present disclosure presents a lead engagement device configured to be positioned in a lead lumen of a lead. The lead engagement device includes a hypotube. The hypotube includes a wall, and the wall includes an inner surface defining an inner lumen and an outer surface opposite the inner surface. The wall defines a longitudinal axis of the hypotube. A plurality of lead engagement fingers are coupled to the wall. The plurality of lead engagement fingers extend outwardly and proximally from the outer surface at acute angles, and planes in which the acute angles are disposed extend diagonally relative to the longitudinal axis. The plurality of lead engagement fingers are configured to translate relative to the lead and permit relative motion between the lead engagement device and the lead when applying a first force to the lead engagement device. The plurality of lead engagement fingers are configured to engage the lead and inhibit relative motion between the lead engagement device and the lead when applying a second force to the lead engagement device, the second force being applied in an opposite direction than the first force.
The lead engagement device according to the previous paragraph, wherein the plurality of lead engagement fingers are configured such that upon (A1) applying the second force to the lead engagement device and (A2) urging the lead engagement device to rotate relative to the lead in a first direction or not urging the lead engagement device to rotate relative to the lead, the plurality of lead engagement fingers engage the lead and inhibit relative motion between the lead engagement device and the lead, and upon (B1) applying the second force to the lead engagement device and (B2) urging the lead engagement device to rotate relative to the lead in a second direction opposite the first direction, the plurality of lead engagement fingers translating relative to the lead and permitting relative motion between the lead engagement device and the lead.
The lead engagement device according to any of the previous paragraphs, wherein the wall further comprises a distal end portion, and each of the plurality of lead engagement fingers extends from a distal end coupled to the wall to a free proximal end, as viewed from the distal end portion, in a finger rotational direction, the finger rotational direction being the same as the first direction and opposite the second direction.
The lead engagement device according to any of the previous paragraphs, wherein the hypotube further comprises a plurality of apertures extending through the wall from the inner surface to the outer surface, each of the plurality of apertures disposed adjacent to one of the plurality of lead engagement fingers.
The lead engagement device according to any of the previous paragraphs, wherein the plurality of lead engagement fingers have rectangular shapes.
The lead engagement device according to any of the previous paragraphs, wherein the plurality of lead engagement fingers have triangular shapes.
The lead engagement device according to any of the previous paragraphs, wherein at least one of the plurality of lead engagement fingers has a distal end coupled to the wall and a proximal free end opposite the distal end.
The lead engagement device according to any of the previous paragraphs, wherein at least one of the acute angles is in a range of 5 to 45 degrees.
The lead engagement device according to any of the previous paragraphs, wherein the planes in which the acute angles are disposed extend diagonally relative to the longitudinal axis at a diagonal angle a range of 5 to 45 degrees.
The present disclosure also presents a method of manufacturing a lead engagement device. The method includes providing a hypotube including a wall, the wall including an inner surface defining an inner lumen and an outer surface opposite the inner surface, the wall defining a longitudinal axis of the hypotube. The method further includes cutting the wall to form a plurality of lead engagement fingers. The method further includes deforming the plurality of lead engagement fingers such that the plurality of lead engagement fingers normally extend outwardly, proximally, and at acute angles from the outer surface, and planes in which the acute angles are disposed extending diagonally relative to the longitudinal axis.
The method according to the previous paragraph, wherein cutting the wall comprises laser cutting the wall.
The method according to any of the previous paragraphs, wherein deforming further comprises forming a plurality of apertures extending through the wall from the inner surface to the outer surface and disposed adjacent to the plurality of lead engagement fingers.
The method according to any of the previous paragraphs, wherein cutting provides the plurality of lead engagement fingers with rectangular shapes.
The method according to any of the previous paragraphs, wherein cutting provides the plurality of lead engagement fingers with triangular shapes.
The method according to any of the previous paragraphs, wherein at least one of the acute angles is in a range of 5 to 45 degrees.
The method according to any of the previous paragraphs, wherein the planes in which the acute angles are disposed extend diagonally relative to the longitudinal axis at a diagonal angle a range of 5 to 45 degrees.
The phrases “at least one”, “one or more”, and “and/or” are open-ended expressions that are both conjunctive and disjunctive in operation. For example, each of the expressions “at least one of A, B and C”, “at least one of A, B, or C”, “one or more of A, B, and C”, “one or more of A, B, or C” and “A, B, and/or C” means A alone, B alone, C alone, A and B together, A and C together, B and C together, or A, B and C together. When each one of A, B, and C in the above expressions refers to an element, such as X, Y, and Z, or class of elements, such as X1-Xn, Y1-Ym, and Z1-Z0, the phrase is intended to refer to a single element selected from X, Y, and Z, a combination of elements selected from the same class (for example, X1 and X2) as well as a combination of elements selected from two or more classes (for example, Y1 and Z0).
The term “a” or “an” entity refers to one or more of that entity. As such, the terms “a” (or “an”), “one or more” and “at least one” may be used interchangeably herein. It is also to be noted that the terms “comprising”, “including”, and “having” may be used interchangeably.
The term “means” as used herein shall be given its broadest possible interpretation in accordance with 35 U.S.C. Section 112(f). Accordingly, a claim incorporating the term “means” shall cover all structures, materials, or acts set forth herein, and all of the equivalents thereof Further, the structures, materials or acts and the equivalents thereof shall include all those described in the summary, brief description of the drawings, detailed description, abstract, and claims themselves.
It should be understood that every maximum numerical limitation given throughout this disclosure is deemed to include each and every lower numerical limitation as an alternative, as if such lower numerical limitations were expressly written herein. Every minimum numerical limitation given throughout this disclosure is deemed to include each and every higher numerical limitation as an alternative, as if such higher numerical limitations were expressly written herein. Every numerical range given throughout this disclosure is deemed to include each and every narrower numerical range that falls within such broader numerical range, as if such narrower numerical ranges were all expressly written herein.
The preceding is a simplified summary of the disclosure to provide an understanding of some aspects of the disclosure. This summary is neither an extensive nor exhaustive overview of the disclosure and its various aspects, embodiments, and configurations. It is intended neither to identify key or critical elements of the disclosure nor to delineate the scope of the disclosure but to present selected concepts of the disclosure in a simplified form as an introduction to the more detailed description presented below. As will be appreciated, other aspects, embodiments, and configurations of the disclosure are possible utilizing, alone or in combination, one or more of the features set forth above or described in detail below.
The accompanying drawings are incorporated into and form a part of the specification to illustrate several examples of the present disclosure. These drawings, together with the description, explain the principles of the disclosure. The drawings simply illustrate preferred and alternative examples of how the disclosure may be made and used and are not to be construed as limiting the disclosure to only the illustrated and described examples. Further features and advantages will become apparent from the following, more detailed, description of the various aspects, embodiments, and configurations of the disclosure, as illustrated by the drawings referenced below.
It should be understood that the drawings are not necessarily to scale. In certain instances, details that are not necessary for an understanding of the disclosure or that render other details difficult to perceive may have been omitted. It should be understood, of course, that the disclosure is not necessarily limited to the particular embodiments illustrated herein.
Before any embodiments of the disclosure are explained in detail, it is to be understood that the disclosure is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The disclosure is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of “including,” “comprising,” or “having” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items.
The present disclosure relates generally to lead engagement devices for engaging and facilitating removal of an implanted lead, such as a cardiac implantable electronic device (“CIED”) lead, from a patient's body. Referring to
With continued reference to
Referring now to
The hypotube 200 further includes a plurality of apertures 218 and a plurality of adjacent lead engagement fingers 220. The apertures 218 and the lead engagement fingers 220 may both be formed, for example, by laser cutting and bending portions of the hypotube 200, as described in further detail below. Generally, the lead engagement fingers 220 extend outwardly from the outer surface 204 of the wall 202 proceeding away from the distal end portion 214 and toward the proximal end portion and diagonally relative to the longitudinal axis 210. As described in further detail below, the lead engagement fingers 220 facilitate selectively moving and securing the distal lead engagement portion 102 within the lumen of a lead.
In some embodiments and as illustrated, each of the lead engagement fingers 220 has a distal end 222 coupled to the wall 202 and a proximal free end 224 opposite the distal end 222. In some embodiments and as illustrated, the lead engagement fingers 220 are monolithically coupled to and cantilevered from the wall 202 at their distal ends 222. In some embodiments and as illustrated, the lead engagement fingers 220 are normally disposed at acute angles 226 relative to the outer surface 204 of the wall 202 (“normally” and variants thereof referring to situations in which external forces are not applied to component). In some embodiments and as illustrated, the acute angles 226 are normally in a range of 10 to 30 degrees. In some embodiments and as illustrated, planes 228 in which the acute angles 226 are disposed extend diagonally relative to the longitudinal axis 210 (for example, at a diagonal angle in a range of 5 to 45 degrees). Stated another way, each finger 220 extends from the distal end 222 to the proximal free end 224, as viewed from the distal end portion 214 of the hypotube 200, in a “finger rotational direction.” In some embodiments and as illustrated, the fingers 220 may extend in a counter-clockwise finger rotational direction. In other embodiments, the fingers 220 may extend in a clockwise finger rotational direction.
The general structure of the fingers 220 described above facilitates selectively moving and securing the distal lead engagement portion 102 within the lumen of a lead as follows. Upon applying a first force to the lead engagement portion 102 (for example, applying a pushing force in a generally distal direction), the fingers 220 slide relative the lead and permit relative motion between the lead engagement portion 102 and the lead. Upon applying a second force to the lead engagement portion 102 (for example, applying a pulling or traction force in a generally proximal direction), and urging the lead engagement device 100 to rotate within the lead in a direction opposite the finger rotational direction (for example and as illustrated, a clockwise direction), the plurality of lead engagement fingers 220 slide relative to the lead and permit relative motion between the lead engagement device 100 and the lead (in both the distal and proximal directions). In contrast, upon applying the second force to the lead engagement device 100 and urging the lead engagement device 100 to rotate within the lead in the finger rotational direction (for example and as illustrated, a counter-clockwise direction), or not urging the lead engagement device 100 to rotate relative to the lead, the fingers 220 engage the lead and inhibit relative motion between the lead engagement device 100 and the lead.
In some embodiments, the lead engagement fingers 220 are generally present along the majority of the length of the hypotube 200. More specifically, the lead engagement fingers 220 may be present over a length in a range of 50 to 75 cm from a most-distal finger 220 to a most-proximal finger. Accordingly, the lead engagement fingers 220 may provide a relatively large area for engaging implanted leads. In some embodiments and as illustrated, the lead engagement fingers 220 may be arranged in one or more spiral patterns along the hypotube 200. In some embodiments, multiple lead engagement fingers 220 may be disposed at the same longitudinal position along the wall 202 of the hypotube 200 or grouped at various longitudinal positions. Groups of lead engagement fingers 220 may be disposed apart by the same longitudinal distance, as illustrated, or different longitudinal distances. In some embodiments, each lead engagement finger 220 may be disposed at a different longitudinal position than the other lead engagement fingers 220.
The lead engagement fingers 220 and the apertures 218 may be provided in a variety of shapes, sizes, and arrangements. The apertures 218 extend through the wall 202 from the inner surface 206 to the outer surface 204. In some embodiments and as illustrated, each of the fingers 220 has a rectangular shape. The rectangular shape may have a length (between the distal end 222 and the proximal free end 224) of, for example, 0.010 to 0.250 inches. The rectangular shape may have a width (perpendicular to the length) of, for example, 45 degrees. In other embodiments, one or more of the fingers 220 has a different shape, such as a triangular shape, a semi-elliptical shape, a semi-parabolic shape, or the like.
Each aperture 218 may have the same shape as the adjacent finger 220 (although each aperture 218 may be slightly larger than the adjacent finger 220 due to the manner in which the features are formed, as described in further detail below). In some embodiments and as illustrated, each of the apertures 218 has a rectangular shape. In other embodiments, one or more of the apertures 218 has a different shape, such as a triangular shape, a semi-elliptical shape, a semi-parabolic shape, or the like.
Referring now to
The foregoing discussion has been presented for purposes of illustration and description. The foregoing is not intended to limit the disclosure to the form or forms disclosed herein. In the foregoing Summary for example, various features of the disclosure are grouped together in one or more aspects, embodiments, and/or configurations for the purpose of streamlining the disclosure. The features of the aspects, embodiments, and/or configurations of the disclosure may be combined in alternate aspects, embodiments, and/or configurations other than those discussed above. This method of disclosure is not to be interpreted as reflecting an intention that the claims require more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed aspect, embodiment, and/or configuration. Thus, the following claims are hereby incorporated into this Detailed Description, with each claim standing on its own as a separate preferred embodiment of the disclosure.
Moreover, though the description has included description of one or more aspects, embodiments, and/or configurations and certain variations and modifications, other variations, combinations, and modifications are within the scope of the disclosure, for example, as may be within the skill and knowledge of those in the art, after understanding the present disclosure. It is intended to obtain rights which include alternative aspects, embodiments, and/or configurations to the extent permitted, including alternate, interchangeable and/or equivalent structures, functions, ranges or steps to those claimed, whether or not such alternate, interchangeable and/or equivalent structures, functions, ranges or steps are disclosed herein, and without intending to publicly dedicate any patentable subject matter.
The present application claims the benefit of U.S. Provisional Application Ser. No. 62/840,308, filed Apr. 29, 2019 which is hereby incorporated by reference herein.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2020/061334 | 4/23/2020 | WO | 00 |
| Number | Date | Country | |
|---|---|---|---|
| 62840308 | Apr 2019 | US |
