Abstract

Disclosed is a guidewire configured to provide high torsional stiffness without detrimentally increasing bending stiffness. Such a device provides a high ratio of torsional stiffness to bending stiffness. The guidewire device includes a core with a proximal section and a distal section. The distal section of the core is coupled to a microfabricated outer tube such that the distal section of the core passes into and is encompassed by the outer tube.

IPC Classes  ?

• A61M 25/09 - Guide wires
• A61M 25/00 - CathetersHollow probes
• A61M 25/01 - Introducing, guiding, advancing, emplacing or holding catheters

Abstract

This disclosure describes microfabricated intravascular devices that are configured for high axial strength while also maintaining effective bending flexibility. A tube member includes a series of circumferentially extending rings connected to one another by a series of axially extending beams. Transverse cuts separate and define the rings. A series of axial cuts are aligned with the beams and extend from the beams partially into the adjoining rings so that the beam length is nested partially within the axial length of the adjoining rings. This increases the functional length of the beams to provide bending flexibility while still sufficient ring structure to provide effective axial stiffness.

IPC Classes  ?

• A61M 25/00 - CathetersHollow probes
• A61M 25/16 - Making or assembling not otherwise provided for

Abstract

This disclosure describes microfabricated core wires configured for use in an intravascular device such as a guidewire or microcatheter. A microfabricated core wire includes a plurality of disks spaced apart from one another along a length of the distal section and a plurality of longitudinally extending ribbons interposed between the disks, each ribbon extending between and connecting a pair of adjacent disks. Various arrangements of disks and ribbons may be provided to control stiffness across a length of the core wire, particularly at or near the distal tip of the core wire.

IPC Classes  ?

• A61M 25/00 - CathetersHollow probes
• A61M 25/09 - Guide wires

Abstract

Disclosed is a guidewire having a core wire and an outer tube within which the distal section of the core is inserted. The outer diameter of the tube is greater than the outer diameter of the proximal section of the core wire. The guidewire also includes a proximal coil and a distal, radiopaque coil each disposed over the distal section of the core. A bushing coil is disposed over the proximal coil and distal coil. The proximal coil, distal coil, and bushing coil aid in filling the annular space between the core and the tube and thereby centering and aligning the core and tube.

IPC Classes  ?

• A61M 25/09 - Guide wires

Abstract

Disclosed are intravascular devices having enhanced one-beam cut patterns. An elongated member includes a plurality of fenestrations that define a plurality of axially extending beams interspersed between a plurality of circumferentially extending rings. The beams are formed using a dual-pass cutting method in which a blade makes two, rotationally offset cutting passes at a given longitudinal location of the elongated member. The resulting beam has enhanced structure that avoids overly sharp edges and minimizes structural weak points.

IPC Classes  ?

• A61M 25/00 - CathetersHollow probes
• A61B 1/005 - Flexible endoscopes
• A61M 25/01 - Introducing, guiding, advancing, emplacing or holding catheters
• A61M 25/09 - Guide wires
• B26D 3/12 - Slitting marginal portions of the work, i.e. forming cuts, without removal of material, at an angle, e.g. a right angle, to the edge of the work
• B26D 3/14 - Forming notches in marginal portion of work by cutting

Abstract

The present disclosure relates to guidewire devices with an outer tube and a core. The distal section of the core extends into and is surrounded by the outer tube. One or more centering mechanisms are also disposed within the outer tube and are arranged to fill a portion of the annular space between the core and the inner surface of the tube. The one or more centering mechanisms thereby assist in keeping the distal section of the core axially aligned within the tube, which enables effective control of the device and minimizes undesirable whip movements of the guidewire.

IPC Classes  ?

• A61M 25/09 - Guide wires

Abstract

The present disclosure relates to guidewire devices (900) having shapeable tips and effective torquability. A guidewire device includes a core (902) having a proximal section and a tapered distal section. A tube structure (904) is coupled to the core such that the tapered distal section extends into the tube structure. The tube structure includes a plurality of bypass cuts (930, 940) formed tangentially within the tube structure to increase the flexibility of the tube structure and to reduce the tendency of resilient forces from the tube structure to disrupt a shaped distal tip of the guidewire device.

IPC Classes  ?

• A61M 25/09 - Guide wires

Abstract

An interventional device (100) configured for passage to the aortic root and to a coronary artery, the interventional device comprising: an elongated member extending between a proximal end and a distal end, the elongated member including a proximal section (102); a distal section (110); and an intermediate section (104) having a proximal-intermediate section (106) extending distally from the proximal section and a distal intermediate section (108) extending proximally from the distal section, wherein the proximal- intermediate section includes a microfabricated cut arrangement enabling preferential flexing in one plane, and wherein the distal- intermediate section is more rigid than the proximal-intermediate section and the distal section.

IPC Classes  ?

• A61M 25/00 - CathetersHollow probes

Abstract

The present disclosure relates to core-wire joints for micro-fabricated medical devices, such as guidewires. A hybrid guidewire device includes a core (102) having a joint (105) between a proximal section (110) and a distal section (112) of the core and a tube structure (104) surrounding the joint. The proximal section of the core is made of or includes stainless steel and the distal section is made of or includes a superelastic material such as nitinol. Further, the terminal, distal portion of the proximal section of the core includes serrations (116), and a terminal, proximal portion of the distal section of the core includes complementary serrations (118) sized and shaped to interlock with serrations (116). The distal end of the proximal section mechanically interlocks with a proximal end of the distal section to form the joint.

IPC Classes  ?

• A61M 25/09 - Guide wires

Abstract

The present disclosure relates to interventional devices such as catheters and guidewire devices having micro-fabricated features for providing flexibility while maintaining good torquability. An interventional device includes an elongated member (500) having an arrangement of fenestrations which define a plurality of axially extending beams coupling a plurality of circumferentially extending rings. The fenestrations are arranged so that the resulting beams form a distributed, non-helical and non-linear pattern along the length of the elongated member. The pattern of fenestrations thereby minimizes or eliminates preferred bending axes.

IPC Classes  ?

• A61M 25/00 - CathetersHollow probes

Abstract

An intravascular device, such as s guidewire device, includes a hollow proximal section and a hollow distal section joined to the proximal section and extending distally from the proximal section to form a continuous lumen extending from a proximal end of the device to a distal end of the device. An inner member extends from the proximal end to the distal end and is joined to the distal end. The inner member is translatable within the lumen in response to applied tension. At least the distal section includes a micro-fabricated cutting pattern that enables deflection of the distal end in response to the application of tension to the inner member.

IPC Classes  ?

• A61M 25/00 - CathetersHollow probes
• A61M 25/01 - Introducing, guiding, advancing, emplacing or holding catheters
• A61M 25/09 - Guide wires

Abstract

The present disclosure relates to vascular devices such as guidewires and microcatheters having integrated coil sections for optimizing torquability, flexibility, and ability to shape and maintain the distal tip. A guidewire device includes a core and a tube structure coupled to the core such that at least a portion of the core passes into the tube structure. A distal section of the tube structure includes a spiral cut arrangement that configures the distal section as an integral coil integrally incorporated as part of the tube structure. The integrated coil configuration increases the flexibility of the tube structure to reduce the tendency of resilient forces from the tube structure to disrupt a shaped distal tip of the guidewire device.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes Identification of persons
• A61M 29/00 - Dilators with or without means for introducing media, e.g. remedies
• A61M 25/01 - Introducing, guiding, advancing, emplacing or holding catheters

Abstract

The present disclosure relates to guidewire devices having shapeable tips and effective torquability. A guidewire device includes a core having a proximal section and a tapered distal section. A tube structure is coupled to the core such that the tapered distal section extends into the tube structure. The tube structure includes a plurality of bypass cuts formed tangentially within the tube structure to increase the flexibility of the tube structure and to reduce the tendency of resilient forces from the tube structure to disrupt a shaped distal tip of the guidewire device.

IPC Classes  ?

• A61M 25/09 - Guide wires

Abstract

The present disclosure relates to guidewire devices having shapeable tips and effective torquability. A guidewire device includes a core having a proximal section and a tapered distal section. A tube structure is coupled to the core such that the tapered distal section of the core extends into and distally beyond the tube structure. The portion of the core extending distally beyond the tube forms a shapeable tip. One or more coils also extend distally beyond the tube. The tip is configured to reduce the tendency of resilient forces from the tube structure to disrupt a customized shape of the tip.

IPC Classes  ?

• A61M 25/09 - Guide wires

Abstract

The present disclosure relates to guidewire devices having shapeable tips and effective torquability. A guidewire device includes a core having a proximal section and a tapered distal section. A tube structure is coupled to the core such that the tapered distal section of the core extends into and distally beyond the tube structure. The portion of the core extending distally beyond the tube forms a shapeable tip. A polymer covering encompasses the tip. The tip is configured to reduce the tendency of resilient forces from the tube structure to disrupt a customized shape of the tip.

IPC Classes  ?

• A61M 25/09 - Guide wires

Abstract

An embodiment is directed to an embolic device comprised of a coil made of a first material and disposed on the inside of a tube structure made of a second material. The tube structure has micro-fabricated fenestrations formed in the tube to provide fluid communication between the lumen of the tube and the surrounding environment, thereby exposing the inner coil. The fenestrations also trip flow around the embolic device. In one embodiment, the embolic device is comprised of a tantalum coil on the inside of a polyetheretherketone (PEEK) tube. The PEEK tube has the advantage of providing a micromachined delivery implant frame and radiopacity, while the internal tantalum coil provides radiopacity and thrombogenicity. A material other than PEEK may be used for embodiments of embolic devices without departing from the spirit of the disclosure.

IPC Classes  ?

• A61M 25/00 - CathetersHollow probes
• A61M 25/09 - Guide wires

Abstract

The present invention relates to catheter and guidewire devices and embodiments thereof. In particular, the present invention relates to catheter and guidewire devices further including embodiments directed to devices having elastomer laminate layers, and formed from hybrid materials. In an exemplary embodiment, a catheter device comprising: a micro-fabricated elongated outer member having an outer surface and an interior surface forming a lumen extending from a proximal end to a distal end and a plurality of fenestrations made through said outer surface and said interior surface into at least a portion of said lumen; and an outer elastomer laminate layer in contact with at least a portion of said outer surface and filling said plurality of fenestrations is provided.

IPC Classes  ?

• A61M 25/09 - Guide wires

Abstract

Micro-cutting machines for forming cuts in catheters, guidewires, and similar products, are disclosed, including a micro-cutting machine that can directly control the dimensions of the resultant beams being cut into products, and that can capture images of each cut for feedback control and accuracy verification.

IPC Classes  ?

• B26D 5/02 - Means for moving the cutting member into its operative position for cutting