Granted Patent B2

US 12,478,770 · App. 18/758,729 · Granted Nov 25, 2025

Inventors: Stewart M. Kume (Sunnyvale, CA); Michael Chang (Sunnyvale, CA); Michael P. Wallace (Sunnyvale, CA)

Assignee: BOSTON SCIENTIFIC SCIMED, INC.

A61M29/00A61B17/0218A61M25/0068A61M25/0108A61M25/0606A61M25/0662A61M25/09A61M29/02A61M39/1011A61M39/24A61M2025/0008A61M25/0023A61M2025/0188A61M2025/0681A61M2025/0687A61M2025/0915A61M2205/583A61M2210/12

Abstract

Claims (20)

1 . A micropuncture kit for direct access into a lumen of a blood vessel, the kit comprising:

a micropuncture access needle comprising a proximal hub coupled to an elongate shaft defining an inner lumen and a visible depth indicator positioned on the elongate shaft a distance away from a distal tip of the elongate shaft;

a guidewire positionable through the inner lumen of the micropuncture access needle, the guidewire comprising a distal tip and at least one visible depth indicator on the guidewire a distance away from the first landmark of the guidewire; and

a microaccess cannula comprising an elongate body defining an inner lumen and a plurality of visible depth indicators formed on the elongate body, wherein each of the plurality of visible depth indicators identifies a distance from a distal tip of the cannula to a respective depth indicator;

wherein alignment of a first visible depth indicator of the at least one visible depth indicator positioned on the guidewire with a proximal edge of the cannula provides a visual indication to a user that the first landmark of the guidewire is aligned with the distal tip of the cannula;

wherein alignment of a second visible depth indicator of the at least one visible depth indicator positioned on the guidewire with a proximal edge of the cannula provides a visual indication to a user that the first landmark of the guidewire is aligned with the distal tip of the micropuncture access needle;

wherein alignment of a third visible depth indicator of the at least one visible depth indicator positioned on the guidewire with a proximal edge of the cannula provides a visual indication to a user that the first landmark of the guidewire positioned distally of the distal tip of the micropuncture access needle by a predetermined distance indicated by the third visible depth indicator.

2 . The kit of claim 1 , wherein the guidewire comprises a distalmost flexible section including the first landmark of the guidewire, a transition section proximal to the distalmost flexible section, and a stiffer core section extending proximally from the transition section.

3 . The kit of claim 2 , wherein the distalmost flexible section is between 1 cm and 2 cm, and the transition section is between 2 cm and 3 cm.

4 . The kit of claim 2 , wherein the transition section and the core section are configured to support the microaccess cannula inserted into the vessel.

5 . The kit of claim 1 , wherein the guidewire is in a range of 0.014″ to 0.018″ outer diameter and wherein the micropuncture needle is in a range from 21G to 24G.

6 . The kit of claim 1 , wherein the at least one visible depth indicator positioned on the guidewire has a proximal edge, a distal edge and a width extending between the proximal edge and the distal edge.

7 . The kit of claim 6 , wherein the distance away from the first landmark of the guidewire is measured from the distal tip to the distal edge of the at least one visible depth indicator.

8 . The kit of claim 6 , wherein inserting the guidewire through the inner lumen of the elongate shaft until the distal edge is aligned with a back end of the proximal hub of the access needle extends the first landmark of the guidewire beyond the distal tip of the elongate shaft an extension length.

9 . The kit of claim 8 , wherein advancing the guidewire through the inner lumen of the elongate shaft until the proximal edge is aligned with the back end of the proximal hub of the access needle extends the first landmark of the guidewire beyond the distal tip of the elongate shaft the extension length plus the width of the at least one visible depth indicator.

10 . The kit of claim 9 , wherein the extension length is 3 cm and the width of the at least one visible depth indicator is 2 cm.

11 . The kit of claim 1 , wherein the visible depth indicator of the access needle is a chemical-etched marker, a laser-etched marker, or a pad printed marker.

12 . The kit of claim 1 , wherein each of the plurality of visible depth indicators is formed by a number of marks, wherein the number of marks identifies a number of increments from the distal tip of the cannula.

13 . The kit of claim 12 , wherein each increment is 10 mm and the number of marks is at least one mark.

14 . The kit of claim 1 , wherein a first of the plurality of visible depth indicators on the cannula comprises one mark and the first visible depth indicator is 10 mm away from the distal tip of the cannula.

Assignments (2)

Continuity (10)

References Cited (400)