Imaging catheter, tip, tube body and medical device

Patent metadata

Field	Value
Publication number	US-12496428-B2
Application number	US-202217819922-A
Country	US
Kind code	B2
Filing date	Aug 15, 2022
Priority date	Mar 4, 2020
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

An imaging catheter, a tip, a tube body and a medical device, relating to the field of medical instruments, where the imaging catheter includes a tube body and a tip, the tube body includes a first shuttling wall and a second shuttling wall, a first lumen is formed between the first shuttling wall and the second shuttling wall, the tip includes a first mounting wall and a second mounting wall, and a second lumen is formed between the first mounting wall and the second mounting wall. The second lumen is communicated with the first lumen, and a proximal end of the first mounting wall corresponds between the first shuttling wall and the second shuttling wall. A radial distance between a point m and a point n is a, and an inner diameter of the first lumen is b, where a≥b.

First claim

What is claimed is:

1 . An imaging catheter, comprising: a tube body and a tip, wherein the tube body comprises a first shuttling wall and a second shuttling wall, the first shuttling wall and the second shuttling wall are distributed along a radial direction of the tube body, and a first lumen is formed between the first shuttling wall and the second shuttling wall;
the tip comprises a first mounting wall and a second mounting wall, the first mounting wall and the second mounting wall are distributed along a radial direction of the tip, and a second lumen is formed between the first mounting wall and the second mounting wall; a proximal end of the first mounting wall and a proximal end of the second mounting wall are configured to be butted with a distal end of the first shuttling wall and a distal end of the second shuttling wall, respectively, so as to enable the second lumen to be communicated with the first lumen, and the proximal end of the first mounting wall corresponds between the first shuttling wall and the second shuttling wall, such that there is a drop between the proximal end of the first mounting wall and the distal end of the first shuttling wall; a radial distance between a point m and a point n is a, and an inner diameter of the first lumen is b, wherein a≥b, to eliminate the drop, so as to enable an instrument to enter the second lumen from the first lumen; wherein the point m is a proximal end point of the first mounting wall, the point n is a point on the proximal end of the second mounting wall or the distal end of the second shuttling wall, and the point n is close to a proximal end of the tube body relative to the point m along an axial direction of the tube body; wherein the proximal end of the second mounting wall is provided with a first notch connected with the second lumen, the distal end of the second shuttling wall is provided with a second notch communicated with the first lumen, a proximal end of the first notch is communicated with a distal end of the second notch, and the point n is located in an area corresponding to the second notch.

2 . The imaging catheter according to claim 1 , wherein a proximal end face of the first mounting wall is aligned with a proximal end face of the second mounting wall along an axial direction of the tip, a distal end face of the first shuttling wall is aligned with a distal end face of the second shuttling wall along the axial direction of the tube body, and the axial direction of the tube body is in the same direction as the axial direction of the tip.

3 . The imaging catheter according to claim 1 , wherein the tip comprises a main body and an extended portion, a distal end of the extended portion is connected to a proximal end of the main body, and a proximal end of the extended portion is connected to a distal end of the tube body, and an outer diameter of the extended portion is smaller than an outer diameter of the main body, such that a stepped structure is formed between the extended portion and the main body;
the second lumen passes through both the extended portion and the main body, and the proximal end of the first mounting wall, the proximal end of the second mounting wall and the first notch are all arranged on the extended portion.

4 . The imaging catheter according to claim 1 , wherein the second mounting wall comprises a transition wall, a distal end of the tip has an outlet configured to allow the instrument to pass out of the second lumen, a proximal end of the transition wall extends to a distal end of the first notch, a distal end of the transition wall extends to the outlet, and the transition wall is configured to change a moving direction of the instrument such that the instrument passes out of the outlet.

5 . The imaging catheter according to claim 1 , wherein the imaging catheter further comprises a fixing ring, a distal end of the fixing ring is sleeved around an outer wall of a proximal end of the tip, and a proximal end of the fixing ring is sleeved around an outer wall of a distal end of the tube body, such that the tube body and the tip are relatively fixed, and the fixing ring is configured to close the first notch and the second notch.

6 . The imaging catheter according to claim 1 , wherein a guide surface is arranged on a wall surface of the proximal end of the first mounting wall, the guide surface is configured to guide the instrument passed out of the first lumen into the second lumen;
wherein a graph of the guide surface intercepted by a reference plane is a first straight line inclined relative to a central axis of the tip, and a radial distance from the first straight line to the second mounting wall gradually decreases along a direction from a proximal end of the first straight line to a distal end of the first straight line, wherein the reference plane is a plane passing through the central axis; and wherein a distal end of the tip has an outlet configured to allow the instrument to pass out of the second lumen, a graph of an outer contour of the outlet intercepted by the reference plane is a second straight line or an arc line inclined relative to the central axis, an inclined direction of the second straight line the an arc line relative to the central axis is opposite to an inclined direction of the first straight line relative to the central axis, and the guide surface is configured to guide the instrument located in the second lumen to pass out of the outlet.

7 . The imaging catheter according to claim 1 , wherein a guide surface is arranged on a wall surface of the proximal end of the first mounting wall, the guide surface is configured to guide the instrument passed out of the first lumen into the second lumen, and wherein a proximal end point of the guide surface coincides with the proximal end point of the first mounting wall.

8 . The imaging catheter according to claim 1 , wherein the tube body comprises a metal mesh tube and a multi-lumen tube, and the multi-lumen tube is sheathed within the metal mesh tube.

9 . The imaging catheter according to claim 1 , wherein the tube body further comprises a third shuttling wall and a fourth shuttling wall, the first shuttling wall, the second shuttling wall, the third shuttling wall and the fourth shuttling wall are distributed along the radial direction of the tube body, and a third lumen is formed between the third shuttling wall and the fourth shuttling wall;
the tip further comprises a third mounting wall and a fourth mounting wall, the first mounting wall, the second mounting wall, the third mounting wall and the fourth mounting wall are distributed along the radial direction of the tip, and a fourth lumen is formed between the third mounting wall and the fourth mounting wall; a proximal end of the third mounting wall is configured to be butted with a distal end of the third shuttling wall, and a proximal end of the fourth mounting wall is configured to be butted with a distal end of the fourth shuttling wall, such that the fourth lumen is communicated with the third lumen; wherein an inner diameter of the fourth lumen is larger than an inner diameter of the third lumen, such that both the proximal end of the fourth mounting wall and the proximal end of the first mounting wall correspond between the first shuttling wall and the second shuttling wall; and wherein the imaging catheter further comprises a camera and a wire, the camera is mounted within the fourth lumen, and the wire is configured to pass through the third lumen and the fourth lumen, and is connected with the camera.

10 . A tip configured to be assembled with a tube body, the tube body comprises a first shuttling wall and a second shuttling wall, the first shuttling wall and the

Assignees

• Micro Tech Nanjing Co Ltd

Inventors

• Wang Jiwei
• Li Xiaochun
• Gao Duangui

Classifications

• A61M25/0082

  Catheter tip comprising a tool · CPC title

• A61B1/0011

  Manufacturing of endoscope parts · CPC title

• A61B1/05

  characterised by the image sensor, e.g. camera, being in the distal end portion · CPC title

• A61B1/018

  for receiving instruments · CPC title

• A61B1/273

  for the upper alimentary canal, e.g. oesophagoscopes, gastroscopes · CPC title