JP2007330483A5 - - Google Patents

Claims (17)

A catheter assembly that is inserted into a living body and sucks foreign matter in the living body,
An outer catheter having an outer catheter body that is flexible and has a long tubular shape with a lumen opened at the tip;
A long inner linear body that is flexible and is inserted into the outer catheter body, and an inner structural body that is provided at a distal end of the inner linear body and has an elastic head. Prepared,
With the inner structure inserted into the outer catheter, the head is slid within the outer catheter body by moving the inner linear body in the proximal direction relative to the outer catheter. The foreign body is configured to be sucked from the distal end opening of the outer catheter body ,
The catheter assembly according to claim 1, wherein an outer diameter of the inner linear body is smaller than a maximum outer diameter of the head .   2. The catheter assembly according to claim 1, wherein the head can project from a distal end opening of the outer catheter body in a state where the inner structure is inserted into the outer catheter. A first lumen is formed along the longitudinal direction of the inner linear body,
3. The catheter assembly according to claim 1, wherein the head is formed with a second lumen that communicates with the first lumen and opens at a tip of the head.   The catheter assembly according to claim 3, wherein each of the first lumen and the second lumen functions as an insertion passage through which a guide wire is inserted.   The catheter assembly according to claim 4, wherein the second lumen is blocked by the guide wire in a state where the guide wire is inserted.   The catheter assembly according to any one of claims 3 to 5, wherein a maximum outer diameter of the head in a natural state is substantially equal to or slightly smaller than an inner diameter of the outer catheter body.   The catheter assembly according to any one of claims 3 to 5, wherein a maximum outer diameter of the head in a natural state is larger than an inner diameter of the outer catheter body.   8. The head according to claim 7, wherein when the head slides within the outer catheter body, an outer peripheral surface thereof is pressed by an inner peripheral surface of the outer catheter body, and the second lumen is narrowed or occluded. Catheter assembly.   The said inner structure is joined to the base end part of the said inner side linear body, and has an inner side hub comprised with the cylindrical body connected to a said 1st lumen | bore. Catheter assembly.   The inner structure has a cap that is detachably attached to a proximal end opening of the inner hub, and the proximal end side of the first lumen is closed in a state where the cap is attached to the proximal end opening. The catheter assembly according to claim 9.   The catheter assembly according to any one of claims 1 to 10, wherein the head has a portion whose outer diameter gradually decreases in a distal direction.   The catheter assembly according to any one of claims 1 to 11, wherein the head has a portion whose outer diameter gradually decreases in the proximal direction.   The catheter assembly according to claim 1, wherein the head has an X-ray contrast property. The catheter assembly according to any one of claims 1 to 13, wherein the outer catheter body is substantially transparent. The catheter assembly according to any one of claims 1 to 14, wherein a distal end portion of the outer catheter body has X-ray contrast properties. The catheter according to any one of claims 1 to 15, wherein the inner peripheral surface of the outer catheter body and / or the outer peripheral surface of the head is subjected to a friction reducing process for reducing friction between these surfaces. Assembly. The catheter assembly according to any one of claims 1 to 16, further comprising state maintaining means for maintaining a state in which the inner structure is inserted into the outer catheter.