Cannula assembly

Details Cannula assembly Cannula assembly

1987-07-15

1988-09-06

Wolfe, Willis R.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604280, 604248, 604158, A61B 1732

Patent

active

047690186

ABSTRACT:
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.

REFERENCES:
patent: 4137920 (1979-02-01), Bonnet
patent: 4345589 (1982-08-01), Hiltebrandt
patent: 4643717 (1987-02-01), Cook et al.
patent: 4688554 (1987-08-01), Habib
Journal of Arthroscopic and Related Surgery, vol. 3, No. 8 (1987), Aspen Labs advertisement and Karl Storz advertisement.
"What's New", Stryker Surgical advertisement, Aug. 1986.
Surgical Instruments Except Eye Instruments, Storz Instrument Co.-13th Edition (copyright page; pp. 295; 317; 325) Jan. 1977.
Storz Ophthalmic Products (Table of Contents; pp. 9; 22; 23; 26) Jan. 1983.

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