Surgical access port with flexible sealing cannula
AssigneeEthicon Endo-Surgery, Inc.
InventorsChristopher W. Widenhouse, Frederick E. Shelton, IV
Life of this patent
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Abstract
A surgical access device for surgical instruments comprises a housing with an instrument port and zero closure valve. A cannula is disposed distally relative the housing. The cannula comprises a distal end, a proximal end, and a flexible tube having a longitudinal axis between the distal and proximal ends. An instrument seal is positioned adjacent the distal end of the cannula. The instrument seal is dimensioned to have an interference fit with a surgical instrument inserted into the cannula. Longitudinal movements of a surgical instrument are accommodated by buckling of the flexible tube while the relative longitudinal position of the instrument seal and instrument are substantially unchanged.
Claims12
A surgical access device for surgical instruments, comprising:
- a) a housing with an instrument port and zero closure valve;
- b) a cannula disposed distally relative the housing, the cannula comprising a distal end, a proximal end, and a flexible tube having a longitudinal axis between the distal and proximal ends;
- c) an instrument seal positioned adjacent the distal end of the cannula, the instrument seal being dimensioned to have an interference fit with a surgical instrument inserted into the cannula;
- wherein the longitudinal movements of a surgical instrument are accommodated by buckling of the flexible tube resulting in one or more lateral bulges spaced from the instrument while the longitudinal position of the instrument seal relative to the instrument is substantially unchanged.
A surgical access device, comprising:
- a) an housing with an instrument port;
- b) a cannula disposed distally relative the housing, the cannula comprising a distal end, a proximal end, and a flexible braided tube extending between the distal and proximal ends;
- c) an instrument seal positioned adjacent the distal end of the cannula;
- wherein longitudinal movements of a surgical instrument are accommodated by buckling of the flexible braided tube resulting in one or more lateral bulges spaced from the instrument while the longitudinal position of the instrument seal relative to the instrument is substantially unchanged.
Dependencies are inferred from the claim text.