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CN-122003268-A - Echo type guide wire

CN122003268ACN 122003268 ACN122003268 ACN 122003268ACN-122003268-A

Abstract

A guidewire is disclosed for use in procedures requiring, for example, transaxillary access and enhanced echogenicity. The guidewire may include a proximal portion and a distal portion. The distal portion may include a tapered core wire extending from the proximal portion to the distal tip. The distal portion may have a surface texture on at least one surface proximate a distal end of the distal portion. The guidewire may have, for example, a 180-J tip operatively coupled to the tapered core wire. At least a portion of the J-tip has a stiffness less than the stiffness of the tapered core wire. The J-tip may comprise a metal filled polymer, such as tungsten filled polyurethane. The tapered core wire may have a maximum diameter of 0.6-0.7 mm and may have a taper length of 70-120 mm.

Inventors

  • C. Hills

Assignees

  • 阿比奥梅德公司

Dates

Publication Date
20260508
Application Date
20240730
Priority Date
20230731

Claims (17)

  1. 1. A guidewire, comprising: A proximal portion, and A distal portion comprising a tapered core wire extending from the proximal portion to a distal tip, the distal portion having a surface texture on at least one surface proximate a distal end of the distal portion.
  2. 2. The guidewire of claim 1, wherein the guidewire is free of coiled wire.
  3. 3. The guidewire of claim 1 or 2, wherein the guidewire has a 180 ° -J-shaped tip operably coupled to the tapered core wire.
  4. 4. The guidewire of claim 3, wherein at least a portion of the 180-J tip has a stiffness less than a stiffness of the tapered core wire.
  5. 5. The guidewire of claim 3, wherein the 180 ° -J-tip comprises a metal filled polymer.
  6. 6. The guidewire of claim 5, wherein the metal filled polyurethane is a tungsten filled polyurethane.
  7. 7. The guidewire of any one of claims 1-6, wherein the tapered core wire comprises nitinol.
  8. 8. The guidewire of claim 7, wherein the guidewire includes a coating around at least a portion of the tapered core wire.
  9. 9. The guidewire of claim 8, wherein the coating comprises braided Polytetrafluoroethylene (PTFE).
  10. 10. The guidewire of any one of claims 1-9, wherein the tapered core wire has a circular cross-section.
  11. 11. The guidewire of any one of claims 1-10, wherein the tapered core wire has a maximum diameter of 0.6-0.7 mm.
  12. 12. The guidewire of any one of claims 1-11, wherein the tapered core wire has a minimum diameter of 0.1 mm to 0.2 mm.
  13. 13. The guidewire of any one of claims 1-12, wherein the tapered core wire has a tapered length of 70 mm-120 mm.
  14. 14. The guidewire of any one of claims 1-13, wherein the guidewire has a total length of 140 cm-160 cm.
  15. 15. A kit, comprising: the guide wire according to any one of claims 1 to 14, and An introducer sheath and/or a closure device.
  16. 16. A method for delivering a medical device, comprising: Providing a guidewire according to any one of claims 1 to 15; A guidewire is introduced into the heart along a path through the at least one vessel, the path spanning the aortic arch, wherein the guidewire is introduced into the heart without the use of a catheter.
  17. 17. The method of claim 16, further comprising slidably passing a medical device along the guidewire until the medical device reaches a target location.

Description

Echo type guide wire Cross Reference to Related Applications The present application claims priority from U.S. provisional patent application No. 63/529,856 filed on 7/31 of 2023, the contents of which are incorporated herein by reference in their entirety. Technical Field The present disclosure relates to guidewires for medical procedures, and in particular, to echogenic axillary guidewires. Background In a surgical setting, insertion of a blood pump through the armpit of a patient presents unique challenges. Conventional techniques require a wire replacement procedure because typical guidewires cannot safely span the aortic valve. This increases the procedure time by a few minutes even if everything is tried successfully for the first time. Insertion of a suitable guidewire typically involves a number of pauses during replacement to monitor the position of the guidewire and catheter. Commercially available guide wires currently on the market fluoresce due to their density. However, most surgical environments do not include fluoroscopic instrumentation. The use of a guidewire outside of a dedicated catheterization laboratory or hybrid catheterization laboratory/operating room requires the introduction of a portable C-arm for fluoroscopy, which has its own complications, including floor space, personnel requirements, and the like. Although the guide wires currently commercially available on the market are capable of reflecting ultrasound, their visibility through echocardiography is limited due to the narrower guide wires. For example, it is difficult to clearly know the position of the guidewire in the left ventricle because the guidewire is rarely perfectly coplanar with the ultrasound depth. Disclosure of Invention In various aspects, a guidewire may be provided. The guidewire may include a proximal portion and a distal portion. The distal portion may include a tapered core wire extending from a proximal portion to a distal tip, the distal portion having a surface texture on at least one surface proximate a distal end of the distal portion. The guidewire may be free of coiled wire. The guidewire may have, for example, a 180-J tip operably coupled to the tapered core wire. At least a portion of the 180-J tip may have a stiffness less than the stiffness of the tapered core wire. The 180-J tip may include a metal filled polymer, such as tungsten filled polyurethane. The tapered core wire may comprise nitinol. The guidewire may include a coating around at least a portion of the tapered core wire. The coating may comprise woven Polytetrafluoroethylene (PTFE). The tapered core wire may have a circular cross-section throughout its length. The tapered core wire may have a maximum diameter of, for example, 0.6-0.7 mm. The tapered core wire may have a minimum diameter of, for example, 0.1 mm-0.2 mm. The tapered core wire may have a tapered length of 70 mm-120 mm. The guidewire may have a total length of 140 cm-160 cm. In various aspects, a kit may be provided. The kit may include a guidewire as disclosed herein, and may include an introducer sheath and/or a closure device. In various aspects, a method for delivering a medical device may be provided. The method may include providing a guidewire as disclosed herein. The method may include introducing a guidewire into the heart along a path through the at least one vessel that spans the aortic arch, wherein the guidewire is introduced into the heart without the use of a guide catheter. The method may include slidably passing the medical device along the guidewire until the medical device is at the target location. Drawings The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with a general description of the invention given above, and the detailed description of the embodiments given below, serve to explain the principles of the invention. Fig. 1 is a diagram showing a cross-sectional side view of a guidewire. Fig. 2A-2C are illustrations showing side views of various distal tip extensions. Fig. 3A and 3B are illustrations showing cross-sectional views of grooves. Fig. 4 is an illustration of a guidewire positioned within a heart. Fig. 5 is a diagram illustrating a cross-sectional side view of a guidewire. It is to be understood that the appended drawings are not necessarily to scale, presenting a somewhat simplified representation of various features illustrative of the basic principles of the invention. The particular design features of the sequence of operations as disclosed herein, including, for example, the particular size, orientation, location, and shape of the various illustrated components, will be determined in part by the particular intended application and use environment. Some features of the illustrated embodiments have been enlarged or distorted relative to others to facilitate visualization and clear understanding. In particular, thin features may be th