초록 ▼

An improved surgical cannula assembly adapted for receiving and guiding a surgical instrument having an instrument portion insertable through the cannula assembly includes two selectively interconnectable and separable cannula subassemblies. An elongated, longitudinally outer cannula subassembly inc

An improved surgical cannula assembly adapted for receiving and guiding a surgical instrument having an instrument portion insertable through the cannula assembly includes two selectively interconnectable and separable cannula subassemblies. An elongated, longitudinally outer cannula subassembly includes a fluid port extending generally laterally through a portion of the outer cannula subassembly in communication with the interior of the generally hollow outer cannula subassembly. An elongated longitudinally inner cannula subassembly includes an open inner end adapted to be positioned adjacent a surgical sit. A connecting or coupling apparatus is provided for selectively interconnecting the inner and outer cannula subassemblies with one another, in order to define a so-called “full-length”cannula for receiving full-length instruments. The connecting apparatus is also selectively separable in order to disconnect the inner cannula subassembly from the outer cannula subassembly, with the inner cannula subassembly defining a so-called “reduced-length”cannula for receiving reduced-length instruments. At least one valve is interconnected with the outer cannula subassembly in fluid communication with the lateral fluid port to provide fluid communication through the full-length cannula between a fluid flow source and the surgical site.

대표청구항 ▼

An improved surgical cannula assembly adapted for receiving and guiding a surgical instrument having an instrument portion insertable through said cannula assembly, said improved cannula assembly comprising: an elongated, generally hollow longitudinally outer cannula subassembly having open longitud

An improved surgical cannula assembly adapted for receiving and guiding a surgical instrument having an instrument portion insertable through said cannula assembly, said improved cannula assembly comprising: an elongated, generally hollow longitudinally outer cannula subassembly having open longitudinally inner and outer ends, said outer cannula subassembly having a fluid port extending generally laterally through a portion thereof, said fluid port being in communication with the interior of said generally hollow outer cannula subassembly; an elongated, generally hollow longitudinally inner cannula subassembly having open longitudinally inner and outer ends, said open inner end of said inner cannula subassembly being adapted to be positioned adjacent a surgical site; connection means for selectively interconnecting said inner and outer cannula subassemblies with one another with their respective hollow interiors in communication with one another in order to define a full-length cannula and for selectively disconnecting said inner and outer cannula subassemblies from one another in order to define a reduced-length cannula, said connection means including sealing means for sealing said interconnected inner and outer cannula subassemblies in a fluid tight relationship with one another; and a valve interconnected with said outer cannula subassembly in fluid communication with said fluid port in said outer cannula subassembly, said valve being selectively interconnectable in fluid communication with a source of fluid flow and being selectively operable to provide fluid communication through said full-length cannula between said fluid flow source and the surgical site when said open inner end of said inner cannula subassembly is positioned adjacent the surgical site, said full-length cannula being adapted for receiving and guiding a surgical instrument having a full-length instrument portion insertable through said full-length cannula, and said reduced-length cannula being adapted for receiving and guiding a surgical instrument having a reduced-length instrument portion insertable through said reduced-length cannula, the full-length instrument portion being of a sufficient length to protrude from said open inner end of said inner cannula subassembly when inserted through said full-length cannula, and the reduced-length instrument portion being of a sufficient length to protrude from said open inner end of said inner cannula subassembly when inserted through said reduced-length cannula but being of an insufficient length to protrude from said open inner end of said inner cannula subassembly when inserted into said full-length cannula, said improved cannula assembly thereby allowing surgical instruments having instrument portions of different lengths to be used interchangeably, and allowing the use of said fluid flow source, in a surgical procedure without removing said open inner end of said inner cannula subassembly from its position adjacent the surgical site.