Introducer

1. An introducer comprising:

an introducer sheath comprised of an elongated hollow sheath tube and a sheath hub provided at a proximal side of the sheath tube and provided with an insertion port configured to permit a dilator to be inserted into the insertion port, the sheath tube possessing an inner diameter dimension and an outer diameter dimension;

a first information piece on at least one of the sheath tube and the sheath hub which identifies the inner diameter dimension of the sheath tube as being the inner diameter dimension associated with a first Fr size; and

a second information piece on at least one of the sheath tube and the sheath hub which identifies the outer diameter dimension of the sheath tube as a second Fr size;

wherein the first information piece identifies a maximum diameter of a medical device that can be inserted into a lumen of the sheath tube;

wherein the sheath tube has a reduced wall thickness; and

wherein the second information piece indicates the outer diameter dimension of the sheath tube as one Fr size smaller than the first Fr size indicated by the first information piece.

2. The introducer according to claim 1 , wherein the first information piece is at a position closer to the insertion port of the sheath hub than the second information piece.

3. The introducer according to claim 2 ,

wherein the first information piece is on the sheath hub, and

wherein the second information piece is on the sheath tube.

4. The introducer according to claim 2 ,

wherein the sheath hub includes a plurality of members, the plurality of members comprising a sheath support body at the proximal side of the sheath tube; a housing at a proximal side of the sheath support body; a cap attached to the housing and at which the insertion port is formed; and a tab portion in which a hole is formed to positionally fix the introducer sheath,

wherein the first information piece is on at least one of at least one of the members of the sheath hub, and

wherein the second information piece is located on one of the members of the sheath hub different from the at least one member of the sheath hub on which the first information piece is located.

5. The introducer according to claim 4 , wherein the first information piece is at least one of a color and a figure, and wherein the second information piece is at least one of a color and a figure.

6. The introducer according to claim 1 , wherein the first information piece is on the sheath hub, and wherein the second information piece is on the sheath tube.

7. The introducer according to claim 6 , wherein the first information piece is at least one of a color and a figure, and wherein the second information piece is at least one of a color and a figure.

8. The introducer according to claim 1 , wherein the sheath hub includes a plurality of members, the plurality of members comprising: a sheath support body at the proximal side of the sheath tube; a housing at a proximal side of the sheath support body; a cap attached to the housing and at which the insertion port is formed; and a tab portion in which a hole is formed to positionally fix the introducer sheath, wherein the first information piece is on at least one of the members of the sheath hub, and wherein the second information piece is located on one of the members of the sheath hub different from the at least one member of the sheath hub on which the first information piece is located.

9. The introducer according to claim 8 , wherein the first information piece is at least one of a color and a figure, and wherein the second information piece is at least one of a color and a figure.

10. The introducer according to claim 1 , wherein the sheath hub extends proximally beyond the proximal end of the sheath tube.

11. An introducer comprising:

an introducer sheath comprised of an elongated hollow sheath tube and a sheath hub, the elongated hollow sheath tube possessing a proximal end and the sheath hub being connected to the proximal end of the sheath tube, with a portion of the elongated hollow sheath tube and a portion of the sheath hub axially overlapping each other, the sheath hub including an insertion port configured to permit insertion of a dilator into the insertion port, the sheath tube possessing an outer diameter and an inner diameter; and

a first information piece on the sheath tube or the sheath hub, and a second information piece on the sheath tube or the sheath hub, the first and second information pieces being different from one another and identifying the sheath tube of the introducer sheath as possessing a reduced wall thickness relative to a sheath tube of another introducer that possess either an inner or outer diameter that is the same as the inner or outer diameter, respectively, of the sheath tube;

wherein the first information piece identifies the inner diameter dimension of the sheath tube as being the inner diameter dimension associated with a first Fr size;

wherein the second information piece identifies the outer dimension of the sheath tube as a second Fr size;

wherein the first information piece identifies a maximum diameter of a medical device that can be inserted into a lumen of the sheath tube; and

wherein the second information piece indicates the outer diameter dimension of the sheath tube as one Fr size smaller than the first Fr size indicated by the first information piece.

12. The introducer according to claim 11 , wherein the first information piece is on the sheath hub, and wherein the second information piece is on the sheath tube.

13. The introducer according to claim 12 , wherein the first information piece is at least one of a color and a figure, and the second information piece is at least one of a color and a figure.

14. The introducer according to claim 11 , wherein the sheath hub includes a plurality of members, the plurality of members comprising: a sheath support body at a proximal side of the sheath tube; a housing at the proximal side of the sheath support body; a cap attached to the housing and at which the insertion port is formed; and a tab portion in which a hole is formed to positionally fix the introducer sheath, wherein the first information piece is on at least one of the members of the sheath hub, and wherein the second information piece is located on one of the members of the sheath hub different from the at least one member of the sheath hub on which the first information piece is located.

15. The introducer according to claim 14 , wherein the first information piece is at least one of a color and a figure, and the second information piece is at least one of a color and a figure.

16. The introducer according to claim 11 , wherein the first information piece includes a color and the second information piece includes a color.

17. The introducer according to claim 11 , wherein the first information piece is at least one of a color and a figure, and the second information piece is at least one of a color and a figure.

18. The introducer according to claim 11 , wherein the sheath hub includes a sheath support body and a housing, the housing and the sheath support body each possessing a proximal end, the housing possessing a distal end, the proximal end of the sheath support body being positioned proximal of the proximal end of the housing.