Endoscopic papillary large scaffold dilation

Patent metadata

Field	Value
Publication number	US-2025331911-A1
Application number	US-202519193440-A
Country	US
Kind code	A1
Filing date	Apr 29, 2025
Priority date	Apr 30, 2024
Publication date	Oct 30, 2025
Grant date	—

Abstract

A medical device includes a handle assembly and a flexible elongate member extending distally from the handle assembly. The elongate member includes a first lumen extending from the distal end of the elongate member at least partially along the elongate member toward the proximal end of the elongate member. The first lumen is configured to accept a guidewire. The elongate shaft includes a second lumen extending through at least a portion of the elongate member. A cutting wire extends through the second lumen. A distal end of the cutting wire is connected to the distal end of the elongate member, and a portion of the cutting wire extends external to the outer surface of the elongate member proximal of the distal end. An expandable scaffold is disposed at the distal portion of the elongate member. An actuator is configured to actuate the expandable scaffold between a contracted, delivery configuration and a radially expanded, deployed configuration.

First claim

What is claimed is:

1 . A medical device, comprising:
a handle assembly; a flexible elongate member extending distally from the handle assembly, the elongate member having a proximal end, a distal end, an outer surface, and a distal portion proximal to the distal end, the distal end configured to access an opening of a body lumen, and a longitudinal axis extending along a length of the elongate member; a first lumen extending from the distal end of the elongate member at least partially along the elongate member toward the proximal end of the elongate member, the first lumen configured to accept a guidewire; a second lumen extending through at least a portion of the elongate member; a cutting wire extending through the second lumen, a distal end of the cutting wire connected to the distal end of the elongate member, and a portion of the cutting wire extending external to the outer surface of the elongate member proximal of the distal end; an expandable scaffold disposed at the distal portion of the elongate member; and an actuator configured to actuate the expandable scaffold between a contracted, delivery configuration and a radially expanded, deployed configuration.

2 . The medical device of claim 1 , wherein the expandable scaffold includes:
a distal ring slidably disposed around the outer surface of the distal portion of the elongate member; a proximal ring fixed to the elongate member proximal of the distal ring; and a plurality of scaffolding wires extending between the proximal ring and the distal ring.

3 . The medical device of claim 2 , further comprising
a plurality of actuating wires distally extending from the actuator to the distal ring, wherein proximal actuation of the plurality of actuating wires with the actuator moves the distal ring toward the proximal ring to expand the expandable scaffold to the radially expanded configuration.

4 . The medical device of claim 3 , wherein the plurality of actuating wires extends through the proximal ring.

5 . The medical device of claim 4 , further comprising one or more additional lumens extending through the elongate shaft, the one or more additional lumens configured to accept the plurality of actuating wires therethrough.

6 . The medical device of claim 1 , wherein the expandable scaffold includes a plurality of scaffolding wires are arranged circumferentially around the longitudinal axis of the flexible elongate member.

7 . The medical device of claim 6 , wherein the plurality of scaffolding wires is configured to deflect radially outward away from the longitudinal axis of the flexible elongate member.

8 . The medical device of claim 1 , wherein the cutting wire is configured to articulate the distal end of the flexible elongate member when the cutting wire is translated proximally through the lumen.

9 . The medical device of claim 1 , wherein the handle assembly comprises finger rings actuatable to translate the cutting wire.

10 . The medical device of claim 1 , wherein the actuator is a knob slidably surrounding the elongate member.

11 . The medical device of claim 10 , wherein the knob is actuatable in a proximal direction along the elongate member to expand the expandable scaffold to the radially expanded, deployed configuration.

12 . The medical device of claim 11 , wherein the knob is configured to be locked in place when actuated to a proximal position.

13 . The medical device of claim 11 , wherein the knob is positioned between a first port and a second port on the elongate shaft.

14 . The medical device of claim 13 , wherein one of the first port and the second port is in communication with the first lumen.

15 . The medical device of claim 1 , wherein the expandable scaffold is a monolithic tubular member having a plurality of slits defining longitudinal segments therebetween.

16 . A medical device, comprising:
a handle assembly; a flexible elongate member extending distally from the handle assembly, the elongate shaft having a proximal end, a distal end, an outer surface, and a distal portion proximal to the distal end, the distal end configured to access an opening of a body lumen, and a longitudinal axis extending along a length of the elongate member; a first lumen extending from the distal end of the elongate member at least partially along the elongate member toward the proximal end of the elongate member, the first lumen configured to accept a guidewire; a second lumen extending through at least a portion of the elongate member; a third lumen extending distally through the elongate member from an entry portion disposed on a proximal portion of the elongate member, the third lumen configured to accept a contrast fluid; a fourth lumen extending through at least a portion of the elongate member; a cutting wire extending through the second lumen, a distal end of the cutting wire connected to the distal end of the elongate member, and a portion of the cutting wire extending external to the outer surface of the elongate member proximal of the distal end; an expandable scaffold disposed at the distal portion of the elongate member; an actuator configured to actuate the expandable scaffold between a contracted, delivery configuration and a radially expanded, deployed configuration; and an actuation wire extending through the fourth lumen between the expandable scaffold and the actuator; wherein proximal translation of the actuation wire by the actuator causes the expandable scaffold to expand to the radially expanded, deployed configuration.

17 . The medical device of claim 16 , wherein the expandable scaffold includes:
a distal ring slideably disposed around the outer surface of the distal portion of the elongate member, the distal ring coupled to a distal end of the actuation wire; a proximal ring affixed to the elongate member proximal of the distal ring; and a plurality of scaffolding wires extending between the proximal ring and the distal ring.

18 . The medical device of claim 17 , wherein the actuation wire extends through the proximal ring.

19 . The medical device of claim 17 , wherein the actuator includes a knob that is actuatable in a proximal direction to expand the expandable scaffold to the radially expanded, deployed configuration.

20 . A medical device, comprising:
a flexible elongate member having a proximal end, a distal end, an outer surface, and a distal portion proximal to the distal end, the distal end configured to access an opening of a body lumen, and a longitudinal axis extending along a length of the member; a first port disposed on the elongate shaft, the first port in communication with a first lumen extending through the elongate shaft; a second port disposed on the elongate shaft, the second port in communication with a second lumen extending through the elongate shaft; a cutting wire including an exposed portion of the cutting wire extending exterior to the outer surface of the elongate member along the distal portion of the elongate shaft, the cutting wire configured to bow the distal portion of the elongate shaft into a curved shape; an expandable scaffold disposed proximal of the exposed portion of the cutting wire; and an actuator positioned between the first port and the second port, the actuator configured to translate along the elongate shaft to actuate the expandable scaffold between a contracted, delivery configuration and a radially expanded, deployed configuration.

Assignees

• Boston Scientific Medical Device Limited

Inventors

• Sharma Deepak Kumar
• G Sharath Kumar

Classifications

• A61B2018/00952

  rotatable · CPC title

• A61B2018/00601

  Cutting · CPC title

• A61B2018/00184

  Moving parts · CPC title

• A61B18/1492

  having a flexible, catheter-like structure, e.g. for heart ablation (A61B18/1477 takes precedence) · CPC title

• A61B2017/22069

  Immobilising; Stabilising · CPC title