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US 5,397,306 AGranted
Catheter
AssigneeTerumo Kabushiki Kaisha
InventorsMasakiyo Nobuyoshi, Kyuta Sagae
Life of this patent
Estimating the term…
Abstract
The catheter of the present invention comprises a body portion, a distal portion and an internal lumen and at least the above body portion includes a super-elastic metallic tube. This catheter has a high efficiency of transmitting the pushing force given at its proximal end (pushability) and a high torque transmission efficiency. Furthermore, since the body portion of the catheter includes a super-elastic metallic tube, the wall thickness of the body portion can be made sufficiently thin and a catheter with a smaller diameter can be formed.
Claims21
A catheter comprising:
- an inner tube having a body portion, a distal portion and a first lumen having an open digital tip;
- an outer tube which is disposed coaxially with said inner tube, said outer tube having a body portion, a distal portion, and a distal tip recessed by a predetermined distance from the distal tip of said inner tube, and forming a second lumen between an inner surface of said outer tube and an outer surface of said inner tube;
- a contractible and inflatable member which has a tip portion attached to said inner tube and a rear end portion attached to said outer tube, and which communicates with said second lumen near said rear end portion;
- a first opening disposed at a proximal portion of said inner tube and communicating with said first lumen;
- and
- a second opening disposed at a proximal portion of said outer tube and communicating with said second lumen;
- and wherein:
- said outer tube comprises a super-elastic alloy tube, and a flexible synthetic resin tube covering an outer surface of said super-elastic alloy tube;
- said flexible synthetic resin tube of said outer tube protrudes distally from a distal end portion of said super-elastic alloy tube to form said distal portion of said outer tube;
- said inner tube is made of flexible synthetic resin;
- and
- said contractible and inflatable member is made of flexible synthetic resin, said tip portion of said contractible and inflatable member is attached to said flexible synthetic resin inner tube, and said rear end portion of said contractible and inflatable member is attached to said distal portion of said flexible synthetic resin tube of said outer tube.
9 more elements
A catheter comprising:
- an inner tube having a body portion, a distal portion and a first lumen having an open distal tip;
- an outer tube which is disposed coaxially with said inner tube, said outer tube having a body portion, a distal portion and a distal tip recessed by predetermined distance from the distal tip of said inner tube, and forming a second lumen between an inner surface of said outer tube and an outer surface of said inner tube;
- a contractible and inflatable member which has a tip portion attached to said inner tube and a rear end portion attached to said outer tube, and which communicates with said second lumen near said rear end portion;
- a first opening disposed at a proximal portion of said inner tube and communicating with said first lumen;
- and
- a second opening disposed at a proximal portion of said outer tube and communicating with said second lumen;
- and wherein:
- said inner tube comprises a super-elastic alloy tube, and a flexible synthetic resin tube fused to an inner surface of said super-elastic alloy tube;
- said flexible synthetic resin tube of said inner tube protrudes distally from a distal end portion of said super-elastic alloy tube to form said distal portion of said inner tube;
- said outer tube is made of flexible synthetic resin;
- and
- said contractible and inflatable member is made of flexible synthetic resin, said tip portion of said contractible and inflatable member is attached to said flexible synthetic resin tube of said inner tube, and said rear end portion of said contractible and inflatable member is attached to said distal portion of said flexible synthetic resin outer tube.
9 more elements
Dependencies are inferred from the claim text.