JP2010131325A5 - - Google Patents

Claims (12)

A balloon that is expanded by supplying the expansion medium is provided on the distal end side, and an expansion medium supply passage through which the expansion medium for expanding the balloon is distributed is formed from the distal end side to the proximal end side. And a catheter formed with a guide wire insertion passage through which the guide wire is inserted from the distal end side to the middle portion on the proximal end side,
The catheter is inserted, covers the outer peripheral side of the catheter from the distal end side to the proximal end side, holds the balloon provided on the distal end side of the catheter, and opens at least the position covering the balloon and the balloon A sheath that is operated to move relative to the catheter over a position between
The guide wire insertion passage is formed with the open end on the distal end side facing the distal end portion of the catheter, and the open end on the proximal end side facing the middle portion of the catheter,
On the proximal end side of the sheath, a guide wire lead-out opening for leading the guide wire led out from the catheter toward the side of the sheath is provided, and the guide led out from the catheter is provided. A medical catheter device characterized in that a guide direction guide mechanism for guiding a wire so as to guide the wire to the side of the sheath through the guide wire lead-out opening is provided. In the portion corresponding to the proximal end side of the guide wire insertion passage formed in the catheter, a bulge portion bulged so as to be gradually inclined toward the side of the catheter is formed, and the guide wire The opening end on the proximal end side of the insertion passage faces an inclined opening formed by inclining and cutting a part of the bulging portion with respect to the outer peripheral surface of the catheter. The medical catheter device according to 1.   Further, a guide wire led out from the open end to the outside of the catheter is relayed between the open end on the proximal end side of the guide wire insertion passage and the lead-out direction guide mechanism to the lead-out direction guide mechanism. The medical catheter device according to claim 1, further comprising a guide wire relay mechanism for relaying. The guide wire relay mechanism is
It is disposed along the outer peripheral surface of the catheter with the opening end on one end side facing the opening end on the proximal end side of the guide wire insertion passage, and from the opening end on the proximal end side of the guide wire insertion passage. A hollow relay member through which the drawn-out guide wire is inserted and guides the inserted guide wire to the guide-out direction guide mechanism provided in the sheath;
A relay guide member that covers the one end side of the relay member from the open end on the proximal end side of the guide wire insertion passage and is mounted on the outer peripheral side of the catheter to support the relay member on the catheter. The medical catheter device according to claim 3. The guide wire relay mechanism is
It is disposed along the outer peripheral surface of the catheter with the opening end on one end side facing the opening end on the proximal end side of the guide wire insertion passage, and from the opening end on the proximal end side of the guide wire insertion passage. A guide wire to be drawn out is inserted, and has a hollow relay member that guides the inserted guide wire to the guide direction guide mechanism provided in the sheath, and the relay member is joined to the outer peripheral surface of the catheter. The catheter device according to claim 3, wherein the catheter device is fixed to the catheter.   The lead-out direction guide mechanism has one end fixed to the proximal end of the sheath and a wire guide attached so that the distal end enters the guide wire lead-out opening from the outer side of the sheath. The medical catheter device according to claim 1, further comprising a piece.   The catheter and the sheath are formed of a flexible material that can be freely bent and deformed. 2. The medical member according to claim 1, wherein a connecting member is connected, and a connecting member for fixing relative movement between the sheath and the catheter is attached to a proximal end portion of the connecting member. Catheter device.   The connecting member connected to the sheath and the proximal end portion of the sheath is inserted from the proximal end side where the guide wire lead-out opening of the sheath is formed to the proximal end portion side of the sheath of the connecting member. 7. The medical catheter device according to claim 6, wherein the medical catheter device is integrally supported by a synthetic resin tube that is crimped and mounted over the distal end side.   8. The medical device according to claim 7, wherein one end portion of the wire guide piece is fixed to a portion of the sheath where the connecting member is inserted and covered with the heat-shrinkable synthetic resin tube. Catheter device.   The catheter and the sheath are formed of a flexible material that can be freely bent and deformed. 2. The medical device according to claim 1, wherein a connecting member is connected, and a further guide wire lead-out opening communicating with the guide wire lead-out opening provided in the sheath is formed in the connecting member. Catheter device.   The medical catheter device according to claim 1, wherein a tubular vascular stent is mounted in a reduced diameter state on a balloon provided on the distal end side of the catheter. 12. The medical catheter according to claim 11 , wherein the vascular stent is formed by knitting a linear member made of a biodegradable polymer into a cylindrical shape, and the shape of the expanded diameter is memorized. apparatus.