A monorail guides a guide wire introduced into an outer tube in a catheter for stent surgery. The catheter includes the outer tube having an outer hole, an inner tube installed in the outer tube, and a guide wire inserted into the outer hole and the inner tube and protruding outwards from a front end of the inner tube so that the outer tube and the inner tube move along the guide wire so as to be guide a stent. The monorail includes a separation guide which is inserted into and fixed in the outer tube and configured such that the guide wire that is inserted into the outer hole is spaced apart from the inner tube without making contact with the inner tube.
1. A monorail of a catheter for stent surgery, the catheter comprising an outer tube having an outer hole, an inner tube installed in the outer tube, and a guide wire introduced into the outer hole and the inner tube and protruded outwards from a front end of the inner tube so that the outer tube and the inner tube move along the guide wire so as to be guide a stent to a target surgical location for installation of the stent,
wherein the monorail is provided in the catheter so as to space the guide wire apart from the inner tube and guide the guide wire and comprises a separation guide inserted into and fixed in the outer tube and configured such that the guide wire that is introduced into the outer hole is spaced apart from the inner tube without making contact with the inner tube,
wherein the outer tube comprises a small diameter part connected to the operating member, and a large diameter part integrally extending forwards from the small diameter part, the large diameter part being larger in diameter than the small diameter part, the outer hole is formed in the large diameter part at a position adjacent to a junction between the small diameter part and the large diameter part, and
a first end of the separation guide forms a perpendicular end having a surface perpendicular to an axis of the separation guide, and a second end of the separation guide forms semicircular guide ends facing each other, the semicircular guide ends being formed by cutting a central portion of the second end in a V shape such that portions of the wire receiving depression and the tube receiving depression are cut out,
wherein the perpendicular end faces the small diameter part, the guide ends face a front of the outer tube, and the guide wire and the inner tube that are respectively inserted into the wire receiving depression and the tube receiving depression are guided by the guide ends.
2. The monorail of claim 1 , wherein the separation guide inserted into the outer tube has a cylindrical shape, with a wire receiving depression longitudinally formed in a first side of an outer circumferential surface of the separation guide so that the guide wire is introduced into and guided along the wire receiving depression, and a tube receiving depression longitudinally formed in a second side of the outer circumferential surface of the separation guide so that the inner tube is inserted into the tube receiving depression.
3. The monorail of claim 2 , wherein the wire receiving depression and the tube receiving depression are spaced apart from each other.