| 摘要 |
A no-needle blood access device for hemodialysis comprising, a cylindrical external body (20), the external body including a peripheral wall (22) and a bottom wall (24) and opens to its top, the lower portion of the external body being provided with openings (28) at locations diametrically facing with respect to each other, each of pipe members (30) being mounted on the respective openings, each of first and second artificial conduits (12, 14) being fitted into the respective pipe member, each of the artificial conduits being anastomosed to a targeted artery or vein; and a columnar internal body (40) fitted into the external body so as to be rotated in the external body, the internal body being provided with a first through-hole (42) diametrically extending through the internal body in the horizontal direction at the location having a height on which the openings are mounted; the internal body being provided with a second through-hole (48) extending between a first position (44) spaced at an angular distance of 90° clockwise from the first through-hole in an outer surface of the internal body and having a height substantially equal to a height at which the opening locates, and a second position (46) spaced at an angular distance of 90° clockwise from the first through-hole in a top surface of the internal body, the internal body being also provided with a second through-hole extending between a third position (50) spaced at an angular distance of 90° counterclockwise from the first through-hole in the outer surface of the internal body and having a height substantially equal to a height at which the opening locates , and a fourth position (52) spaced at an angular distance of 90° from the first through-hole in the top surface, whereby the device is arranged such that, when the internal body is rotated so that the first through-hole communicates with the openings, the first artificial conduit is in communication with the second artificial conduit through the first through-hole, and when the internal body is rotated so that the first position mates with one of the openings and the third position mates with the other of the openings, the second through-hole is in communication with the first artificial conduit and the third through-hole is in communication with the second artificial conduit.
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