EP3060135A2 - Dispositif d'ancrage médical expansible constitué d'un tube métallique découpé - Google Patents

Dispositif d'ancrage médical expansible constitué d'un tube métallique découpé

Info

Publication number
EP3060135A2
EP3060135A2 EP14830548.5A EP14830548A EP3060135A2 EP 3060135 A2 EP3060135 A2 EP 3060135A2 EP 14830548 A EP14830548 A EP 14830548A EP 3060135 A2 EP3060135 A2 EP 3060135A2
Authority
EP
European Patent Office
Prior art keywords
cut
anchor device
end region
tube
primary
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14830548.5A
Other languages
German (de)
English (en)
Inventor
Giora Kornblau
David Maier Neustadter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Calore Medical Ltd
Original Assignee
Calore Medical Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US14/472,912 external-priority patent/US20140371786A1/en
Application filed by Calore Medical Ltd filed Critical Calore Medical Ltd
Publication of EP3060135A2 publication Critical patent/EP3060135A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/0057—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/0057—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect
    • A61B2017/00575—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect for closure at remote site, e.g. closing atrial septum defects
    • A61B2017/00588—Rigid or stiff implements, e.g. made of several rigid parts linked by hinges
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/0057—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect
    • A61B2017/00575—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect for closure at remote site, e.g. closing atrial septum defects
    • A61B2017/0061—Implements located only on one side of the opening
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/0057—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect
    • A61B2017/00646—Type of implements
    • A61B2017/00659—Type of implements located only on one side of the opening
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00831—Material properties
    • A61B2017/00867—Material properties shape memory effect
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00982—General structural features
    • A61B2017/00986—Malecots, e.g. slotted tubes, of which the distal end is pulled to deflect side struts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B2017/348—Means for supporting the trocar against the body or retaining the trocar inside the body
    • A61B2017/3482—Means for supporting the trocar against the body or retaining the trocar inside the body inside
    • A61B2017/3484—Anchoring means, e.g. spreading-out umbrella-like structure

Definitions

  • the present disclosure relates generally to an expandable anchor device for biomedical applications, and more specifically, to a radially expandable anchor device formed of a cut metal tube.
  • Metal wires can be arranged to lie flat when expanded, forming a geometry similar to the overlapping petals of a flower, as described in U.S. Patent No. 8,366,706. Such a geometrical transformation may not be easily be achieved by a cut metal tube.
  • An overlapping petal pattern may produce a disc-shaped structure that, when covered by an elastic membrane, provides better mechanical support, sturdiness, and sealing performance than non-overlapping loops or petals.
  • the overlapping petal pattern may also provide a large diameter disc relative to the overall length of the device when in its collapsed configuration.
  • the ratio of collapsed length to expanded diameter may be particularly important.
  • An intravascular anchor or artery locator is generally inserted into the blood vessel, expanded, pulled gently against the inner wall of the vessel, held in place during the closure procedure, and then re-collapsed and removed.
  • the anchor has to be sturdy and have a sufficient expanded diameter size to remain firmly within the vessel, yet be short enough when collapsed so that it does not injure the vessel wall upon re-collapse at the end of the procedure when it is oriented sideways across the diameter of the vessel.
  • Anchors with overlapping petal patterns generally provide these beneficial characteristics.
  • wire-based anchors having overlapping petal patterns are expensive to manufacture. Therefore, if an equivalent geometrical configuration could be achieved by using a cut metal tube, the beneficial features of wire-based anchors could be achieved while significantly reducing manufacturing costs.
  • the present disclosure is directed to the design and configuration of an expandable anchor device formed of a cut or slotted metal tube.
  • an axial compressive force is applied to an exemplary cut metal tube of the present disclosure, the tube expands radially such that the bands between the cuts of the tube bend in such a way that they form an overlapping flower petal pattern.
  • Some aspects of the present disclosure include an expandable anchor device formed of a cut metal tube for temporarily occluding an opening in a tissue wall while a treatment applicator is used to close or heal the opening.
  • the anchor device of the present disclosure may be used as a component of a device to thermally close puncture sites (i.e., arteriotomies) on blood vessel walls.
  • the anchor device of the present disclosure is not limited to blood vasculature applications, and may be applied to any vessel, duct, canal, tubular structure, and/or cavity in the body. It is to be understood that the term "body canal” in this disclosure refers to any blood vessel, duct, canal, tubular structure, and/or tissue tract within the body.
  • One embodiment of the present disclosure may include an anchor device comprising an expandable tube, the expandable tube having a first end region and a second end region.
  • the expandable tube may be configured to traverse a perforation in a tissue wall of a body canal and to fit within an interior of the body canal proximate to the perforation.
  • the expandable tube may also include a plurality of primary slits therein, each primary slit extending from the first end region to the second end region, the primary slits cooperating to define a plurality of bands.
  • Each primary slit may comprise at least one substantially longitudinal cut portion and at least one substantially non-longitudinal cut portion extending from the at least one substantially longitudinal cut portion.
  • the primary slits may be configured such that when the first end region and the second end region are compressed towards each other, the plurality of bands splay outward.
  • the primary slits may be configured such that when the first end region and the second end region are compressed towards each other, the plurality of bands splay outward to form an overlapping petal pattern.
  • each primary slit may be connected to a serpentine cut on at least one of the first end region and the second end region.
  • the plurality of bands may include at least one secondary slit within each band, the at least one secondary slit having a length shorter than a length of the primary slit.
  • an anchor device comprising an expandable tube, wherein the expandable tube may be configured to traverse a perforation in a tissue wall of a body canal and to fit within an interior of the body canal proximate to the perforation.
  • the expandable tube includes an elongated central axis and a tubular wall configured to expand radially upon application of an axial compression force along a direction of the central axis.
  • the expandable tube may also comprise at least one non-radial cut in the tubular wall, such that application of the axial compression force results in relative radial motion of surfaces on opposite sides of the cut.
  • Yet another embodiment of the present disclosure may include an anchor device comprising an expandable tube, wherein the expandable tube may be configured to traverse a perforation in a tissue wall of a body canal and to fit within an interior of the body canal proximate to the perforation.
  • the expandable tube includes a tubular wall configured to expand radially upon application of an axial compression force.
  • the expandable tube may also comprise at least one cut in a non-radial plane through the tubular wall such that adjacent surfaces on opposite sides of the cut are ramped with respect to each other, and wherein application of the axial compression force to the cut tube results in relative radial motion of the surfaces on opposite sides of the cut.
  • FIG. 1 A shows an exemplary cut metal tube in a compressed state indicating the dimensions T and 'd', the length and diameter, respectively, of the tube in its compressed state;
  • FIG. 1 B shows the exemplary cut metal tube of FIG. 1 A in an expanded state indicating the dimension ', the diameter of the tube in its expanded state;
  • FIG. 2 is a cross-sectional view of an exemplary cut metal tube indicating components of the device and the angle between them;
  • FIG. 3A shows a cut metal tube in a compressed state, in accordance with exemplary embodiments of the present disclosure
  • FIG. 3B shows the cut metal tube of FIG. 3A in an expanded state, forming an overlapping flower petal like configuration, in accordance with exemplary
  • FIG. 4A shows a cut pattern that may be used in a cut metal tube, in accordance with exemplary embodiments of the present disclosure
  • FIG. 4B shows how the cut pattern shown in FIG. 4A allows deformation of the strips or bands formed by the cuts, in accordance with exemplary embodiments of the present disclosure
  • FIG. 5A shows an expandable cut metal tube in accordance with exemplary embodiments of the present disclosure
  • FIG. 5B shows the cut pattern of the expandable cut metal tube shown in FIG. 5A;
  • FIG. 5C shows another version the cut pattern of the expandable cut metal tube shown in FIG. 5A.
  • FIG. 6 shows a cross-sectional view of a cut metal tube with radial and non- radial cuts, in accordance with exemplary embodiments of the present disclosure.
  • the present disclosure describes an anchor device configured to traverse a perforation or an opening in a tissue wall of a body canal and to fit within an interior space of the body canal proximate to the perforation.
  • Exemplary embodiments of the anchor device are formed of an expandable metal tube having a plurality of slits, slots, cuts, or incisions therein.
  • Such an expandable metal tube is referred to herein as "cut metal tube” or "slotted metal tube.”
  • tube 1 A shows an exemplary cut metal tube 1 with a plurality of slits 15.
  • tube 1 has an outer diameter d and a length of the cut region I, as shown in FIG. 1 A.
  • tube 1 expands radially to an expanded diameter D, as shown in FIG. 1 B.
  • the relationship between the compressed length I, the compressed diameter d, and the expanded diameter D are such that l-(D-d) may be less than 25 times the wall thickness of tube 1 .
  • tube 1 has a compressed length I of less than 7 mm, a compressed diameter of less than 1 .5 mm, and an expanded diameter of greater than 4.5 mm.
  • the expandable section of the tube when an axial compressive force is applied to one or both ends of cut metal tube 1 , the expandable section of the tube, which comprises the cuts or the slits, expands radially.
  • the tube may expand radially up to its maximum expanded diameter D.
  • the expandable section of the tube When the axial compressive force is removed, the expandable section of the tube may return to 90% to 150% of its compressed diameter d.
  • the dimensions of cut metal tube 1 is such that the sum of the compressed length I and the compressed diameter d minus the maximum expanded diameter D is less than 35 times the wall thickness of cut metal tube 1 .
  • the anchor device may comprise a cut metal tube having metal bands between the cuts or the slits.
  • FIG. 2 shows a cross-sectional view of cut metal tube 1 in an expanded configuration.
  • tube 1 comprises metal bands 2, which may bend to form an angle 3 with the longitudinal axis of the tube at its ends.
  • the term "longitudinal axis of the tube” is used to mean a direction that is within 20 degrees of the direction of the line connecting the center points of the ends of a cut metal tube.
  • bands 2 when bands 2 are in an expanded state, bands 2 form an angle 3 with the longitudinal axis of cut metal tube 1 .
  • angle 3 may be between 45° and 135°.
  • angle 3 may be between 60° and 120°.
  • angle 3 may be between 70° and 100°.
  • the widths of some locations along the lengths of bands 2 and cut patterns provided at the ends of cut metal tube 1 are configured to induce tube 1 to preferentially bend in a predefined way when compressive force is applied to the ends of tube 1 along the longitudinal axis of the tube.
  • the widths of some locations along the lengths of bands 2 and cut patterns provided at the ends of cut metal tube 1 are configured to allow the device to bend sufficiently to achieve its intended expanded shape without breaking.
  • the widths of some locations along the lengths of bands 2 and cut patterns provided at the ends of cut metal tube 1 are configured to allow the device to bend sufficiently to achieve its intended expanded shape while all deformations remain substantially elastic.
  • cut metal tube 1 is not connected to the other components of the anchor device of which it forms a part, but rests upon a support element 4, as shown in FIG. 2, which is composed of a wire or tube that fits through cut metal tube 1 .
  • support element 4, upon which cut metal tube 1 rests has at its distal end a section 5 which has a diameter larger than the inner diameter of cut metal tube 1 in its compressed configuration, such that when support element 5 is pulled in the proximal direction through cut metal tube 1 , it applies a force on the distal end of cut metal tube 1 in the proximal direction along the longitudinal axis of the tube.
  • the anchor device may comprise a sleeve 6 around the support element 4, proximal to cut metal tube 1 , as shown in FIG. 2.
  • Sleeve 6 may have an outer diameter larger than the inner diameter of cut metal tube 1 in its compressed configuration, such that when support element 5 is pulled in the proximal direction, sleeve 6 applies a force on the proximal end of cut metal tube 1 in the distal direction along the longitudinal axis of the tube.
  • the deformations that occur during expansion of a cut metal tube of an anchor device are substantially plastic in nature, and therefore, the cut metal tube remains substantially in its expanded configuration even after the expanding forces are removed.
  • the deformations that occur during expansion of the cut metal tube are substantially elastic in nature, and therefore, the cut metal tube returns substantially to its collapsed tubular
  • the slots or cuts in the cut metal tube which define the expandable bands, are substantially parallel with the longitudinal axis of the tube.
  • the cut metal tube is designed such that when expanded by applying a force along the longitudinal axis of the tube, the bands between the slots of the tube remain substantially parallel to the longitudinal axis of the tube, and bend primarily in the radial direction to expand radially outwards as the ends of the tube come closer together.
  • Some embodiments include a cut metal tube designed such that when expanded by applying a force along the longitudinal axis of the tube, the bands between the slots of the device twist such that their bending is in both the radial and circumferential directions, forming an overlapping flower petal pattern as the ends of the tube come closer together.
  • FIG. 3A shows cut metal tube 1 according to one embodiment of the present disclosure
  • FIG. 3B shows an overlapping petal pattern formed by bands 2 of cut metal tube 1 in its expanded configuration
  • the cuts on cut metal tube 1 may include multiple sections, each with a different angle relative to the longitudinal axis of the tube.
  • the proximal, distal, and middle sections may contain cuts that are substantially parallel with the longitudinal axis of the tube, but shifted around the tube relative to each other. The portions of the cuts that connect the proximal and middle sections, and those that connect the middle and distal sections, may be angled relative to the longitudinal axis of the tube.
  • Cut patterns may include multiple sections with different angles relative to the longitudinal axis of the tube so as to produce bands 2 with mechanical properties and behavior superior to those obtained by previously described parallel cuts, or spiral cut patterns.
  • the thickness of the bands and the thickness of the cut patterns in the proximal and distal sections of the tube are such that the twisting that allows the bands to bend in the circumferential direction may take place primarily in the bands, and not in the region of the cut patterns in the proximal and distal sections of the tube.
  • the thickness of the bands and the thickness of the cut patterns in the proximal and distal sections of the tube are such that the twisting that allows the bands to bend in the circumferential direction may take place primarily in the region of the cut patterns in the proximal and distal sections of the tube, and not in the bands themselves.
  • Exemplary embodiments of the present disclosure may comprise flexibility enhancing cut patterns in a proximal and/or distal section of a cut metal tube.
  • a "flexibility enhancing cut pattern” is defined as a cut pattern that results in strips that include multiple turns, such that the path length of each strip in the region of the flexibility-enhancing cut pattern is significantly longer than the longitudinal length of the region of the cut pattern along the tube.
  • Some embodiments include an intermediate axial section having a cut pattern that results in substantially parallel strips (i.e., bands) that are oriented substantially along the length of the tube.
  • the parallel strips of the intermediate section are connected to the strips of the flexibility enhancing cut patterns in the proximal and/or distal sections of the tube.
  • the cut patterns of the intermediate axial section result in substantially parallel strips that run substantially parallel to the longitudinal axis of the metal tube.
  • the cut patterns of the intermediate axial section result in substantially parallel strips that are oriented with a fixed angle relative to the longitudinal axis of the tube, such that the cut patterns twist around the surface of the tube.
  • the orientation angle of the strips or bands of the intermediate axial section is such that the strips twist between 90° and 270° around the surface of the tube over the length of the intermediate section.
  • FIGS. 4A and 4B illustrate an exemplary cut pattern that may be used in a cut metal tube.
  • the exemplary cut pattern includes a first axial section 10 having a flexibility enhancing cut pattern and a second axial section 20 having a straight-cut pattern. As shown in FIG. 4A, the strips of sections 10 and 20 may be connected to each other.
  • the flexibility enhancing cut pattern may include cuts that are straight or curved, symmetrical or asymmetrical, and at any orientation.
  • the flexibility enhancing cuts may or may not include empty spaces.
  • the flexibility-enhancing cut pattern has an "S" shape or a doubleback pattern.
  • Sections 1 0 and 20 may be configured to cooperate with each other, such that when axial compressive force is applied to the cut metal tube, the strips in section 1 0 may deform to allow the section 20 strips connected thereto to rotate.
  • sections 10 and 20 are configured to cooperate with each other such that when the tube is subjected to axial compression force, section 20 expands radially to a substantially greater degree than section 10.
  • FIG. 4B illustrates that the strips of flexibility enhancing cut pattern in section 10 may be deformed to allow a straight-cut strip in axial section 20 to rotate substantially into the axial plane.
  • the cut metal tube may include a third axial section having a cut pattern.
  • second axial section 20 is placed in between first axial section 10 and the third axial section.
  • the cut pattern in the third axial section is a flexibility enhancing cut pattern.
  • First axial section 10, second axial section 20, and the third axial section may be configured to cooperate with each other such that when the tube is subjected to an axial compression force, the strips in second axial section 20 expand radially.
  • the total length of first axial section 1 0, second axial section 20, and the third axial section shortens by more than 90% of the compressed length of second axial section 20.
  • second axial section 20 expands radially to form an overlapping petal design.
  • the cut pattern in second axial section 20 results in substantially parallel strips oriented substantially along the length of the tube.
  • the cut pattern in second axial section 20 results in substantially parallel strips oriented with a fixed angle relative to the longitudinal axis of the tube, such that they twist around the surface of the tube.
  • the strips in second axial section 20 twist between 90° and 270° around the surface of the tube over the length of axial section 20.
  • FIG. 5A shows a cut metal tube 100 having an expandable section and cut patterns that enable the cut metal 100 to expand radially when axial compressive force is applied to the tube.
  • An anchor device formed with cut metal tube 1 00 may be configured to traverse through a tissue perforation or an opening in its compressed state.
  • cut metal tube 100 When cut metal tube 100 is inside a body canal (where the anchor is to be deployed), cut metal tube 100 may be expanded radially to take the form of a flattened disk.
  • cut metal tube 100 may form an overlapping petal design when expanded. Cut metal tube 100 in its expanded configuration may be positioned in close proximity to the perforation or opening in the tissue wall of the body canal.
  • cut metal tube 100 may be undeployed, i.e., cut metal tube 100 may be returned to its compressed state by removing the axial compression force. Cut metal tube 1 00 may be retracted in its compressed state from inside the body canal through the opening in the tissue wall, which may be partially closed as a result of the treatment procedure.
  • FIGS. 5B and 5C illustrate the cut patterns provided on the tubular wall of cut metal tube 100.
  • the cut patterns on cut metal tube 100 are provide to facilitate radial expansion of cut metal tube 100 when an axial compressive force is applied.
  • the cut pattern is configured to allow expansion of cut metal tube 100 into an overlapping petal pattern.
  • cut metal tube 100 may include a first end region 1 1 0, a second end region 130, and an
  • intermediate section 120 extending between first end region 100 and second end region 130.
  • End regions 1 10 and 130 may comprise flexibility-enhancing cut patterns that may form a plurality of strips that are connected to the strips or bands formed in intermediate section 120.
  • first end region 100 and/or second end region 1 30 may include serpentine cuts 1 32.
  • each serpentine cut forms an s-shape.
  • intermediate section 1 20 comprises a plurality of primary slits therein, which cooperate to define a plurality of bands 122.
  • the primary slits are interconnected with serpentine cuts 132.
  • the primary slits are configured such that when first end region 1 1 0 and second end region 130 are compressed towards each other, plurality of bands 122 splay outward.
  • each primary slit in intermediate section 120 comprises at least one substantially longitudinal cut portion 124 and one or more substantially non-longitudinal cut portions 126 extending from substantially longitudinal cut portion 124.
  • at least one substantially longitudinal cut portion 124 and one or more substantially non-longitudinal cut portions 126 may together form the primary slit in cut metal tube 100.
  • at least one substantially longitudinal cut portion 124 and one or more substantially non-longitudinal cut portions 1 26 may cause the primary slit to have a stepped appearance.
  • the primary slit may have a substantially constant pitch throughout its length.
  • each plurality of bands 122 may further include at least one secondary slit 128 therein.
  • Each secondary slit 128 may have a length shorter than the primary slit.
  • Secondary slits 128 may be configured to facilitate radial expansion of intermediate axial section 120.
  • the primary slits and secondary slits 128 may be configured such that when a compressive force along the longitudinal axis of cut metal tube 100 is applied, plurality of bands 122 twist such that they bend is in both the radial and
  • each primary slit may comprise a first non-longitudinal slit 126 extending 90° around the tube, followed by a straight slit 124 extending substantially along the longitudinal axis of the tube, and then a second non-longitudinal slit 126 extending 90° around the tube.
  • the primary slit wraps 1 80° around cut metal tube 100.
  • the length I of the cut portion of cut metal tube 1 00 i.e., the total length of first end region 1 10, intermediate section 120, and second end region 1 30, may be the appropriate length to form a flattened disk of expanded diameter D when axial compression force is applied to cut metal tube 1 00.
  • cut metal tube 1 00 may be made of a super elastic material, for example, Nitinol, so that cut metal tube 100 will return from an expanded configuration to its compressed configuration when the axial compression force (which causes the radial expansion) is removed.
  • cut metal tube 100 may be made of a metal with relatively plastic properties, e.g., stainless steel, such that it will remain in its expanded configuration even after the axial compression force is removed.
  • the cut patterns on cut metal tube 100 may be made with a laser.
  • non-radial or off-center cuts may be made on the tubular walls of cut metal tube 100 to produce angled cuts that facilitate radial expansion of the tube.
  • application of an axial compression force results in relative radial motion of the surfaces on opposite sides of the non-radial cut.
  • the adjacent sections of the tubular wall on opposite sides of the non- radial cut may form a ramp to induce the adjacent sections to overlap each other as the tube expands.
  • the non-radial cuts may further produce adjacent surfaces that when pressed against each other in the circumferential direction induces force upon each other in the radial direction.
  • cut metal tube 1 00 may have a combination of radial and non-radial cuts, with regions of non-radial cuts interspersed between radial cuts. If all of the cuts in cut metal tube 100 are made radially, the friction between adjacent sections of the cuts would impede intended radial expansion when the tube is compressed axially. With non-radial cuts, the adjacent sections overlap each other when axial compression is applied, instead of pressing against each other, thereby facilitating radial expansion.
  • the non-radial cuts may provide the expanded cut metal tube 100 with enhanced functionality, such as, providing sharp edges or angled corners which can be used as blades for cutting, grasping, rasping, scraping, or grinding.
  • non-radial cuts may produce sharp corners with an inner corner angle of less than 80°.
  • radial cuts in a tube are aligned with the radial plane of the tube, whereas non-radial cuts are not aligned with the radial plane of the tube.
  • the plane of a non-radial cut forms a non-perpendicular angle with a plane tangent to the outer surface of the tubular wall at the outer edge of the cut.
  • the angle of a non-radial cut is defined as the angle made by the plane of the non-radial cut with the radial plane that intersects the non-radial plane at the outer edge of the cut.
  • FIG. 6 shows a cross-section of an exemplary cut metal tube 1 00 having radial cuts 150 and a non-radial cut 160.
  • radial cuts 150 are aligned with the radius of cut metal tube 100
  • non-radial cut 160 is not aligned with the radius of cut metal tube 100.
  • the angle of a non-radial cut i.e., the angle 'a' between non-radial plane 155 and radial plane 157 in FIG. 6, may be between 5° and 60°.
  • the angle of non-radial cut 1 60 is 44°.
  • the distance of non-radial cut plane 155 from the longitudinal axis is between 10% and 85% of the radius of cut metal tube 1 00.
  • FIG. 6 also shows the direction of forces on the two adjacent sections 162 and 165 of the tubular wall on opposite sides of non-radial cut 160.
  • Application of axial compression force on cut metal tube 100 may result in radial motion of sections 162 and 165.
  • Section 162 may be induced to move outwards from the center of the tube and section 1 65 may be induced to move inwards towards the center of the tube as a result of the non-radial cut between them.
  • cut metal tube 1 00 may have transition sections between the radial cut sections and the non-radial cut sections. In the transition section, the cut angle varies smoothly from the radial cut angle (0°) to the non-radial cut angle.
  • Some disclosed embodiments include an expandable cut metal tube covered by an elastic material, such that when expanded by applying a force along the longitudinal axis of the tube from both ends of the device, the elastic material is stretched between the bands of the cut metal tube.
  • the elastic material may be silicone, or POLYBLENDTM (AdvanSource Biomaterials, Wilmington, MA), or CHRONOPRENETM (AdvanSource Biomaterials, Wilmington, MA), or any similar elastic material that has appropriate elasticity and strength to stretch over the tube in its expanded configuration and return to its original dimensions when the tube returns to its compressed configuration.
  • the thickness of the elastic material covering the expandable metal tube is between 10 and 250 microns.

Landscapes

  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Cardiology (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)
  • Surgical Instruments (AREA)

Abstract

La présente invention concerne un dispositif d'ancrage expansible dans le sens radial et constitué d'un tube métallique découpé. La paroi tubulaire du tube métallique découpé comporte plusieurs fentes, formant conjointement une pluralité de bandes. Les multiples fentes sont conçues pour permettre à la pluralité de bandes de s'écarter vers l'extérieur sous la forme de pétales se chevauchant lorsqu'une force compressive axiale est appliquée sur le tube métallique découpé. Le tube métallique découpé peut comporter une combinaison de découpes radiales et non-radiales. Les découpes non-radiales permettent aux sections adjacentes de la paroi tubulaire sur les côtés opposés de la découpe de se chevaucher lorsqu'elles sont comprimées l'une contre l'autre par une force compressive axiale, ce qui facilite l'expansion radiale du tube métallique découpé.
EP14830548.5A 2013-10-23 2014-10-15 Dispositif d'ancrage médical expansible constitué d'un tube métallique découpé Withdrawn EP3060135A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201361894445P 2013-10-23 2013-10-23
US201462015968P 2014-06-23 2014-06-23
US14/472,912 US20140371786A1 (en) 2013-04-14 2014-08-29 Expandable medical anchor device formed of cut metal tube
PCT/IB2014/002661 WO2015059567A2 (fr) 2013-10-23 2014-10-15 Dispositif d'ancrage médical expansible constitué d'un tube métallique découpé

Publications (1)

Publication Number Publication Date
EP3060135A2 true EP3060135A2 (fr) 2016-08-31

Family

ID=52396728

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14830548.5A Withdrawn EP3060135A2 (fr) 2013-10-23 2014-10-15 Dispositif d'ancrage médical expansible constitué d'un tube métallique découpé

Country Status (2)

Country Link
EP (1) EP3060135A2 (fr)
WO (1) WO2015059567A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022531433A (ja) * 2019-05-03 2022-07-06 リクロス・カーディオ・インコーポレイテッド 通過可能な隔壁閉塞デバイス
WO2024049647A1 (fr) * 2022-08-30 2024-03-07 Edwards Lifesciences Corporation Introducteur à obturateur extensible

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8882787B2 (en) * 2005-03-02 2014-11-11 St. Jude Medical, Cardiology Division, Inc. Tissue anchor apparatus
WO2007078692A2 (fr) * 2005-12-23 2007-07-12 The Board Of Trustees Of The Leland Stanford Junior University Systemes et procedes de fixation d'os au moyen d'un dispositif extensible
EP2182875A4 (fr) 2007-08-15 2011-08-24 Cardiodex Ltd Systèmes et procédés pour fermeture de perforation
US8568445B2 (en) 2007-08-21 2013-10-29 St. Jude Medical Puerto Rico Llc Extra-vascular sealing device and method
EP2328485B1 (fr) * 2008-08-18 2012-06-06 Cook Medical Technologies LLC Dispositif de fermeture de site d'accès d'un vaisseau
US8252022B2 (en) 2009-07-13 2012-08-28 Vascular Solutions, Inc. Metal vascular aperture closure device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2015059567A2 *

Also Published As

Publication number Publication date
WO2015059567A2 (fr) 2015-04-30
WO2015059567A3 (fr) 2015-08-27

Similar Documents

Publication Publication Date Title
US11406405B2 (en) Multi-pivot thrombectomy device
JP7389159B2 (ja) 血管から閉塞性血餅を除去するための血餅回収デバイス
US11883046B2 (en) Self-expanding intravascular medical device
EP2959853B1 (fr) Dispositif de thrombectomie et équipement de thrombectomie
US20140371786A1 (en) Expandable medical anchor device formed of cut metal tube
US20140046359A1 (en) Shaped Removal Device
US10856962B2 (en) IVC filter retrieval systems with interposed support members
US11399845B2 (en) Vascular cages and methods of making and using the same
US8740931B2 (en) Vascular filter
KR20160127060A (ko) 색전 정형화 미세 코일
BR112019005824B1 (pt) Stent flexível
EP2849834A1 (fr) Dispositif de capture
EP3060135A2 (fr) Dispositif d'ancrage médical expansible constitué d'un tube métallique découpé
KR101772482B1 (ko) 미끄럼 방지 기능이 향상된 스텐트
JP6081948B2 (ja) 柔軟性ステント
US10905448B2 (en) Thrombectomy device
US20140305530A1 (en) Expanding medical device formed of slotted metal tube
CN109966017B (zh) 覆膜支架
CN110662513B (zh) 用于展开自膨胀管的输送系统和展开自膨胀管的方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20160519

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20161213