Introducer for medical tube

• US 5,092,846 A
• Filed: 11/07/1990
• Issued: 03/03/1992
• Est. Priority Date: 11/07/1989
• Status: Expired due to Fees

• Current Assignee: Sumitomo Bakelite Company Limited
• Original Assignee: Sumitomo Bakelite Company Limited
• Inventors: Ura, Fumiki, Izumi, Yasunobu, Nishijima, Mamoru
• Primary Examiner(s): Wilson, John J.
• Application Number:
  US07/609,853
• Time in Patent Office: 482 Days
• Field of Search: 604/165, 604/164, 604/166, 604/167, 604/159, 604/256
• US Class Current: 604/167.04
• CPC Class Codes: A61M 2039/0633 the seal being a passive seal made of a resilient material with or without an opening
• CPC Class Codes: A61M 2039/064 Slit-valve
• CPC Class Codes: A61M 2039/0686 comprising more than one seal
• CPC Class Codes: A61M 25/0662 Guide tubes
• CPC Class Codes: A61M 39/0606 without means for adjusting the seal opening or pressure A61M39/0693 takes precedence

Abstract

A medical tube introducer comprising a body having a valve means encased in an inner cavity I, to which a sheath tube connected with the inner cavity I is mounted at the tip, and having a concave or convex portion formed at the center of the rear end and plural concave or convex portions around the center; and a grip member having an inner cavity II and a dilater at the tip portion which is connected with the inner cavity II and is capable of inserting into the inner cavity of the sheath tube in close contact with the inner cavity, and having a convex or concave portion formed at the positions corresponding to the concave or convex portion at the rear end of the body; said valve means being constructed with plural plate-like valve members, each of which valve members has plural slits crossing with each other at the center, and plural of valve members adjacent to each other are overlaid and integrally joined with each other by shifting the positions of said slits except for joining the slits at the center. The medical tube introducer can ensure fitting of the dilator member with the sheath member stably and hence can operate the sheath member simultaneously merely by operating the dilator member and ensures easy catheterization, i.e., insertion of catheters into a blood vessel, safely with a certainty.

Claims

1. A medical tube introducer comprising a body having a rear end and a tip, and a valve means encased in an inner cavity I, to which a sheath tube connected with the inner cavity I is mounted at the tip, and having a concave portion formed at the center of the rear end and a plurality of concave portions around the center;

and a grip member having an inner cavity II and a dilator at the tip portion which is connected with the inner cavity II and is capable of inserting into the inner cavity of the sheath tube in close contact with the inner cavity, and having a plurality of convex portions formed at the positions corresponding to the concave portions at the rear end of the body, the rear end of the body and the tip portion of the grip member having the same external complementary shape to provide four flat portions, thereby effecting easy fitting between the body and the grip.

2. A medical tube introducer as claimed in claim 1, wherein said valve means is constructed with a plurality of plate-like valve members, each of which valve members has a plurality of slits crossing with each other at the center, and a plurality of valve members adjacent to each other are overlaid and integrally joined with each other by shifting the positions of said slits except for joining the slits at the center.

3. A medical tube introducer as claimed in claim 1, wherein said valve member disposed at the rear end has a concave portion formed on an outer side thereof.

4. A medical tube introducer comprising a body having a rear end and a tip, and a valve means encased in an inner cavity I, to which a sheath tube connected with the inner cavity I, is mounted at the tip, and having a convex portion formed at the center of the rear end and a plurality of convex portions around the center;

and a grip member having an inner cavity II and a dilator at the tip portion which is connected with the inner cavity II and is capable of inserting into the inner cavity of the sheath tube in close contact with the inner cavity, and having a plurality of concave portions formed at the positions corresponding to the convex portions at the rear end of the body, the rear end of the body and the tip portion of the grip member having the same external complementary shape to provide four flat portions, thereby effecting easy fitting between the body and the grip.

5. A medical tube introducer as claimed in claim 4, wherein said valve means is constructed with a plurality of plate-like valve members, each of which valve members has a plurality of slits crossing with each other at the center, and a plurality of valve members adjacent to each other are overlaid and integrally joined with each other by shifting the positions of said slits except for joining the slits at the center.

6. A medical tube introducer as claimed in claim 4, wherein said valve member disposed at the rear end has a concave portion formed on an outer side thereof.