Medical device

• US 4,682,981 A
• Filed: 08/05/1985
• Issued: 07/28/1987
• Est. Priority Date: 08/07/1984
• Status: Expired due to Term

• Current Assignee: Terumo Kabushiki Kaisha (Terumo Corporation)
• Original Assignee: Terumo Kabushiki Kaisha (Terumo Corporation)
• Inventors: Matsumoto, Atsushi, Suzuki, Tatsuo
• Primary Examiner(s): Rosenbaum, C. Fred
• Assistant Examiner(s): Ferros, John D.
• Application Number:
  US06/762,613
• Time in Patent Office: 722 Days
• Field of Search: 604/104, 604/107, 604/165, 604/43, 604/44, 604/45, 604/283, 604/158, 604/164, 604/167, 604/169
• US Class Current: 604/158
• CPC Class Codes: A61M 25/0097 characterised by the hub connectors A61M39/10
• CPC Class Codes: A61M 25/06 Body-piercing guide needles or the like
• CPC Class Codes: A61M 25/0662 Guide tubes

Abstract

A medical device has an outer cylinder and an outer cylinder hub which has a hollow portion communicating with the interior of the outer cylinder and fixed to a proximal portion of the outer cylinder. An inner cylinder is provided which can be detachably inserted into the outer cylinder through the hollow portion of the outer cylinder hub. An inner cylinder hub is provided which has a hollow portion communicating with the interior of the inner cylinder, can be fitted within the outer cylinder hub, and is connected to a proximal portion of the inner cylinder. Means is arranged between the outer and inner cylinder hubs, for preventing relative axial movement of the outer and inner cylinder hubs when the inner cylinder is inserted into the outer cylinder and the inner cylinder hub is fitted into the outer cylinder hub. Means is arranged between the outer and inner cylinder hubs, for preventing relative circumferential rotation of the outer and inner cylinder hubs.

Claims

1. A medical device, comprising:

a first elongated hollow cylindrical member;

a first hollow hub member fixed to a proximal end of said first cylindrical member, the interior of said first hub member communicating with the interior of said first cylindrical member;

a second elongated hollow cylindrical member detachably insertable into said first cylindrical member;

a second hollow hub member fixed to a proximal end of said second cylindrical member, the interior of said second hub member communicating with the interior of said second cylindrical member;

first means for preventing relative axial movement of said first and said second cylindrical members, including a first annular rib formed on the outer surface of said second hub member, and a second annular rib formed on the inner surface of said first hub member, said first rib being located to position beyond said second rib to prevent said axial movement when said second cylindrical member is inserted into said first cylindrical member; and

second means for preventing relative circumferential rotation of said first and said second cylindrical members, including a female polygonal prism surface defining the inner surface of said first hub member, and a male polygonal prism surface defining the outer surface of said second hub member, said male prism being fitted into said female prism to prevent said rotation when said second cylindrical member is inserted into said first cylindrical member.

2. A medical device, comprising:

a first elongated hollow cylindrical member;

a first hollow hub member fixed to a proximal end of said first cylindrical member, the interior of said first hub member communicating with the interior of said first cylindrical member;

a second elongated hollow cylindrical member detachably insertable into said first cylindrical member;

a second hollow hub member fixed to a proximal end of said second cylindrical member, the interior of said second hub member communicating with the interior of said second cylindrical member;

first means for preventing relative axial movement of said first and said second cylindrical members, including a male tapered surface defining the outer surface of said second hub member, and a female tapered surface defining the inner surface of said first hub member, said male tapered surface being fitted into said female tapered surface to prevent said axial movement when said second cylindrical member is inserted into said first cylindrical member; and

second means for preventing relative circumferential rotation of said first and said second cylindrical members, including a female polygonal prism surface defining the inner surface of said first hub member, and a male polygonal prism surface defining the outer surface of said second hub member, said male prism being fitted into said female prism to prevent said rotation when said second cylindrical member is inserted into said first cylindrical member.

3. A catheter introducer, comprising:

a sheath including a first elongated hollow cylindrical member and a first hollow hub member fitted to a proximal end of said first cylindrical member;

a dilator including a second elongated hollow cylindrical member detachably insertable into said first cylindrical member, and a second hub member fixed to a proximal end of said second cylindrical member, said second cylindrical member being adapted to guide a catheter therethrough;

said first hub member including a female polygonal inner surface and a first annular rib;

said second hub member including a male polygonal outer surface and a second annular rib; and

said male polygonal outer surface being formed to fit said female polygonal inner surface and said second rib being located to position beyond said first rib, so that relative axial movement and relative rotation of said sheath and said dilator are prevented when said second cylindrical member is inserted into said first cylindrical member.

4. A catheter introducer, comprising:

a sheath including a first elongated hollow cylindrical member and a first hollow hub member fitted to a proximal end of said first cylindrical member;

a dilator including a second elongated hollow cylindrical member detachably insertable into said first cylindrical member, and a second hub member fixed to a proximal end of said second cylindrical member, said second cylindrical member being adapted to guide a catheter therethrough;

said first hub member having a female tapered polygonal inner surface;

said second hub member having a male tapered polygonal outer surface; and

said male tapered polygonal outer surface being formed to fit said female tapered polygonal inner surface, so that relative axial movement and relative rotation of said sheath and said dilator are prevented when said second cylindrical member is inserted into said first cylindrical member.

5. A medical device, comprising:

a first elongated hollow cylindrical member;

a first hollow hub member fixed to a proximal end of said first cylindrical member, the interior of said first hub member communicating with the interior of said first cylindrical member;

a second elongated hollow cylindrical member detachably insertable into said first cylindrical member;

a second hollow hub member fixed to a proximal end of said second cylindrical member, the interior of said second hub member communicating with the interior of said second cylindrical member;

means for preventing relative movement of said first and said second cylindrical members, including a first annular rib formed on the outer surface of said second hub member, and a second annular rib formed on the inner surface of said first hub member, said first and said second ribs being located to position beyond each other to prevent said axial movement when said second cylindrical member is inserted into said first cylindrical member; and

said first and said second hub members having tapered polygonal fitting surfaces, and being taper-fitted with each other to prevent relative circumferential rotation of said first and said second cylindrical members when said second cylindrical member is inserted into said first cylindrical member.