| US 7,572,274 B2 | ||
| Self-tensioning vascular occlusion device and method for its use | ||
| Zia Yassinzadeh, San Jose, Calif. (US) | ||
| Assigned to Cardiva Medical, Inc., Mountain View, Calif. (US) | ||
| Filed on May 27, 2004, as Appl. No. 10/857,177. | ||
| Prior Publication US 2005/0277980 A1, Dec. 15, 2005 | ||
| Int. Cl. A61B 17/08 (2006.01); A61M 29/00 (2006.01); A61M 31/00 (2006.01) | ||
| U.S. Cl. 606—213 [606/191; 606/198] | 14 Claims |
| 1. A device for hemostasis of a puncture site at the end of a tissue tract leading to a body lumen, the device comprising:
a first tubular member having a proximal end and a distal end configured for insertion through an existing sheath so as to
traverse a length of the sheath;
a second tubular member slidably disposed over the first tubular member and configured for insertion through the existing
sheath so as to traverse the length of the sheath;
an expansible member disposed on the distal end of the first tubular member and configured to be expandable within a lumen
of a vessel and to be seated against the puncture site when expanded; and
a spring coil tensioning member slidably disposed over the first tubular member, a proximal end of the tensioning member being
fixedly attached to a distal end of the second tubular member and a distal end of the tensioning member being fixedly attached
to a distal portion of the first tubular member; and
wherein the spring coil tensioning member has a lengthened configuration when tension is applied by the second tubular member
and a compressed configuration in the absence of such tension and, when in the compressed configuration, is capable of embedding
in subcutaneous tissue of the tract leading to the vessel so as to anchor and maintain tension of the expansible member against
the puncture site at a vascular surface of the lumen.
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