CATHETER FOR RADIATION THERAPY

WIPO Patent Application WO/2002/011805

A1

A catheter for radiation therapy comprising: a centering mechanism for irradiating a blood vessel wall with a homogeneous dose; and a perfusion mechanism for perfusing peripheral vessels with blood at all times of centering. The catheter has no roughness on its surface so that it causes neither resistance in moving in the vessel nor a danger of damaging the vessel inner face. In an expandable portion located at the leading end of the catheter, a protrusion is formed in the portion of a specific region at the expanded time by the elasticity difference between two kinds of materials of different elasticities. In the expandable portion, there are arranged a low-elasticity portion and a high-elasticity portion, the latter being expanded more largely than the former to make the protrusion when a pressure is applied. Alternatively, the catheter is given a two-layer structure of inner and outer layers of two kinds of materials of different elasticities, and a cavity is formed in the layer of the lower elasticity so that a portion, as corresponding to the cavity, of the layer of the higher elasticity may protrude when a pressure is applied.

NAKANO RYOJI (JP)
ISHIBASHI TAKUYA (JP)

PCT/JP2001/005155

February 14, 2002

June 15, 2001

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KANEKA CORP (JP)
NAKANO RYOJI (JP)
ISHIBASHI TAKUYA (JP)

A61L29/00; A61M25/00; A61N5/10; A61F2/958; A61N5/06; (IPC1-7): A61M25/00; A61N5/10

US5618266A	1997-04-08
JPS59181125A	1984-10-15
US5947924A	1999-09-07
EP0904798A1	1999-03-31
JPH0551356U	1993-07-09
US5199939A	1993-04-06
US5302168A	1994-04-12
JPH10507951A	1998-08-04

Yanagino, Takao (15-5 Miyahara 1-chome Yodogawa-ku Osaka-shi, Osaka, JP)

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