Medical elongated body

Patent metadata

Field	Value
Publication number	US-10245411-B2
Application number	US-201815921734-A
Country	US
Kind code	B2
Filing date	Mar 15, 2018
Priority date	Sep 29, 2015
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

A medical elongated body including a tubular main body and a hub connected to the tubular main body. The medical elongated body includes a strain relief supported by a distal portion of the hub. The strain relief surrounds a predetermined range of the proximal portion of the tubular main body. The medical elongated body includes a hydrophilic lubricating coating layer and a temperature responsive lubricating coating layer on the outer surface of the tubular main body, the temperature responsive lubricating coating layer being proximal to the hydrophilic lubricating coating layer. The hydrophilic lubricating coating layer exhibits lubricating characteristics when wet. The temperature responsive lubricating coating layer exhibits hydrophilic characteristics and lubricating characteristics at a temperature lower than a critical temperature when wet and exhibits hydrophobic characteristics and non-lubricating characteristics at a temperature equal to or higher than the critical temperature when wet.

First claim

What is claimed is:

1. A medical elongated body comprising:
a tubular main body comprising a lumen, the tubular main body extending in an axial direction, the tubular main body possessing an outer surface, a distal portion and a proximal portion;
a hub connected to the proximal portion of the tubular main body, the hub comprising an interior that communicates with the lumen of the tubular main body, the hub possessing a distal portion; and
a strain relief supported by the distal portion of the hub and surrounding a predetermined range of the proximal portion of the tubular main body;
a hydrophilic lubricating coating layer on the outer surface of the tubular main body, the hydrophilic lubricating coating layer exhibiting lubricating characteristics when wet;
a temperature responsive lubricating coating layer on the outer surface of the tubular main body, the temperature responsive lubricating coating layer exhibiting hydrophilic characteristics and lubricating characteristics at a temperature lower than a critical temperature when wet and exhibiting hydrophobic characteristics and non-lubricating characteristics at a temperature equal to or higher than the critical temperature when wet; and
the temperature responsive lubricating coating layer being proximal to the hydrophilic lubricating coating layer on the outer surface of the tubular main body.

2. The medical elongated body according to claim 1 , wherein
the tubular main body has an overall length in the axial direction, and
the hydrophilic lubricating coating layer is formed on the outer surface of the tubular main body for at least half of the overall length of the tubular main body.

3. The medical elongated body according to claim 1 , wherein
the strain relief possesses a distal end, and
the temperature responsive lubricating coating layer is formed on the outer surface of the tubular main body over a predetermined range from distal relative to the distal end of the strain relief to proximal relative to the distal end of the strain relief, so that the temperature responsive lubricating coating layer both axially overlaps with a portion of the strain relief and extends distally beyond the distal end of the strain relief.

4. The medical elongated body according to claim 1 , wherein the critical temperature of the temperature responsive lubricating coating layer is 25° C. to 35° C.

5. The medical elongated body according to claim 1 , further comprising:
a marker formed on the proximal portion of the tubular main body, and
the temperature responsive lubricating coating layer possessing a distal end that is at a same position or is distal to the marker in the axial direction.

6. The medical elongated body according to claim 1 , wherein at least one of the tubular main body and the temperature responsive lubricating coating layer includes a coloring matter for visually detecting a position of the temperature responsive lubricating coating layer.

7. The medical elongated body according to claim 1 , wherein at least a part of the temperature responsive lubricating coating layer is in contact with the hydrophilic lubricating coating layer.

8. The medical elongated body according to claim 7 , wherein
the hydrophilic lubricating coating layer possesses an outer surface, and
at least a part of the temperature responsive lubricating coating layer covers the outer surface of the hydrophilic lubricating coating layer.

9. The medical elongated body according to claim 7 , wherein
the temperature responsive lubricating coating layer possesses an outer surface, and
at least a part of the hydrophilic lubricating coating layer covers the outer surface of the temperature responsive lubricating coating layer.

10. A medical elongated body comprising:
a tubular main body comprising a lumen extending in an axial direction of the tubular main body and extending throughout the tubular main body, the tubular main body possessing an outer surface, the tubular main body comprising a first portion, a second portion and a third portion in the axial direction, the second portion being immediately adjacent and distal to the first portion, the third portion being immediately adjacent and distal to the second portion;
a hub connected to the first portion of the tubular main body;
a temperature responsive lubricating coating layer which exhibits a first lubricity when wetted by a first fluid whose temperature is lower than a critical temperature and exhibits a second lubricity when wetted by a second liquid whose temperature is equal to or higher than the critical temperature, the temperature responsive lubricating coating layer directly contacting the outer surface of the tubular main body along at least the second portion of the tubular main body;
a hydrophilic lubricating coating layer which possesses a third lubricity when wet, the hydrophilic lubricating coating layer directly contacting the outer surface of the third portion of the tubular main body;
the second lubricity imparting greater frictional resistance than the first lubricity when the tubular main body moves within a living body; and
the second lubricity imparting greater frictional resistance than the third lubricity when the tubular main body moves within the living body.

11. The medical elongated body according to claim 10 , wherein the temperature responsive lubricating coating layer extends along the outer surface of the tubular main body along the first portion, so that at least a portion of the hub axially overlaps a portion of the temperature responsive lubricating coating layer.

12. The medical elongated body according to claim 10 , wherein
the temperature responsive lubricating coating layer possess a distal end,
the hydrophilic lubricating coating layer possesses a proximal end, and
the distal end of the temperature responsive lubricating coating layer directly contacts the proximal end of the hydrophilic lubricating coating layer.

13. The medical elongated body according to claim 10 , wherein
the tubular main body has an overall length in the axial direction, and
the hydrophilic lubricating coating layer is formed on the outer surface of the tubular main body for at least half of the overall length of the tubular main body.

14. The medical elongated body according to claim 10 , wherein the temperature responsive lubricating coating layer changes from having the first lubricity to the second lubricity based on a temperature change upon being introduced into the living body.

15. A method comprising:
inserting an elongated tubular body into a living body, the elongated tubular body comprising an outer surface, the elongated tubular body comprising a first portion and a second portion, the second portion being immediately adjacent and proximal to the first portion in an axial direction, the first portion of the elongated tubular body possessing a first frictional resistance, the second portion of the elongated tubular body possessing a second frictional resistance;
increasing the frictional resistance of the second portion of the elongated tubular body when the elongated tubular body is positioned in the living body so that the frictional resistance of the second portion positioned in the living body increases from one frictional resistance to a greater frictional resistance while at the same time not increasing the frictional resistance of the first portion of the elongated tubular body when the elongated tubular body is positioned in the living body; and
fixing the second portion of the elongated tubular body at a location in the living body by friction created between the second portion

Assignees

• Terumo Corp

Inventors

• Okamura Ryo
• Omata Kazuya

Classifications

• A61M25/00

  Catheters; Hollow probes (dilators A61M29/00; {peritoneal catheters A61M1/285; tracheal tubes A61M16/04; for drainage A61M27/00; for uterus, vagina or rectum A61M31/00} ; for measuring or testing A61B; {materials for catheters A61L29/00}) · CPC title

• A61L29/10

  Inorganic materials · CPC title

• C08L27/06

  Homopolymers or copolymers of vinyl chloride · CPC title

• C08L75/04

  Polyurethanes · CPC title

• A61M2025/0675

  Introducing-sheath slitters · CPC title