| US 7,540,859 B2 | ||
| Dialysis valve and method | ||
| Timothy J. Claude, Coon Rapids, Minn. (US); Edward A. Barlow, Bloomington, Minn. (US); David W. Hunter, Minneapolis, Minn. (US); and Michael S. Rosenberg, Eagan, Minn. (US) | ||
| Assigned to INTERRAD Medical, Inc., Plymouth, Minn. (US) | ||
| Appl. No. 10/497,137 PCT Filed Apr. 22, 2004, PCT No. PCT/US2004/012438 § 371(c)(1), (2), (4) Date Aug. 18, 2004, PCT Pub. No. WO2004/093937, PCT Pub. Date Nov. 04, 2004. |
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| Claims priority of provisional application 60/464778, filed on Apr. 23, 2003. | ||
| Prior Publication US 2005/0038396 A1, Feb. 17, 2005 | ||
| Int. Cl. A61M 5/00 (2006.01) | ||
| U.S. Cl. 604—246 [604/6.1; 251/4] | 22 Claims |
| 1. An implantable dialysis valve for fluid connection between an artery and a vein, comprising:
an implantable tube to convey blood from an arterial connection end to a venous connection end, the tube extending for a longitudinal
length;
an actuation port to receive a fluid through a self-sealing membrane for adjustment of the longitudinal length of the tube;
and
a hydraulically actuated bellows in fluid communication with the actuation port so as to adjust from a first length to a second
length when the fluid is received through the membrane in the actuation port, the bellows being coupled with the tube so that
when the bellows adjusts from the first length to the second length, the tube contemporaneously increases in longitudinal
length and decreases in diameter at a narrowed portion, wherein the narrowest portion of the tube decreases in diameter while
not fully closing.
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