| US 7,553,297 B2 | ||
| Access cannula for endoscopic operations | ||
| Georg Lajtai, Wels (Austria); Michael Sauer, Tuttlingen (Germany); and Andre Timmermans, Ruurlo (Netherlands) | ||
| Assigned to Karl Storz GmbH & Co. KG, (Germany) | ||
| Filed on Dec. 16, 2002, as Appl. No. 10/320,308. | ||
| Application 10/320308 is a continuation of application No. 10/172047, filed on Jun. 14, 2002, abandoned. | ||
| Prior Publication US 2003/0181858 A1, Sep. 25, 2003 | ||
| Int. Cl. A61M 5/178 (2006.01) | ||
| U.S. Cl. 604—167.06 | 14 Claims |
| 1. An access cannula for endoscopic operations, comprising
a cannula tube,
a valve body unit having a valve housing and a valve mounted in said valve housing,
said valve body unit is connected releasably as a completely assembled valve body unit to one end of said cannula tube,
said valve of said valve body unit ensures a tight closure of said cannula tube at said one end but allows an instrument to
be passed through said valve body unit and said cannula,
wherein said valve is designed as a double-disk valve having a first and a second disk, said first and second disks being
connected to one another via an elastic, strip-like bridge,
wherein said first and second disks are superimposed one to another with the elastic, strip-like bridge bent to form a loop
extending laterally therefrom, and
wherein said valve is a one-component part.
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