Cannulas having body wall retention features, and related systems and methods
AssigneeIntuitive Surgical Operations, Inc.
InventorRobert C. Reid
Life of this patent
Estimating the term…
Abstract
A cannula may include a cannula bowl having an opening to receive an instrument configured to be advanced through the cannula, and a cannula tube extending distally from the cannula bowl. The cannula tube may have a proximal end opening, a distal end opening disposed at an opposite end of the cannula from the proximal end opening, and lateral wall defining a passage extending from the proximal end opening to the distal end opening. The lateral wall can have outer dimensions defining a waisted portion with smaller outer dimensions than a region disposed proximally or distally to the waisted portion along a length of the cannula tube.
Claims19
A cannula comprising:
- a cannula tube defining a passage configured to receive an instrument configured to be advanced through the cannula,
- the cannula tube comprising a proximal end opening and a distal end opening,
- the cannula tube having a first, tapered outer profile that narrows in a proximal-to-distal direction along a first length portion of the cannula tube,
- the cannula tube having a second, flared outer profile that widens in a proximal-to-distal direction along a second length portion of the cannula tube,
- the cannula tube having a third, tapered outer profile that narrows in a proximal-to-distal direction along a third length portion of the cannula tube;
- and
- a series of axially-spaced ribs extending radially from an outer lateral wall of the cannula tube at least partially along one or more of the first, tapered outer profile, the second, flared outer profile, or the third, tapered outer profile;
- wherein the second length portion is distal to the first length portion;
- and
- wherein the third length portion is distal to the second length portion.
A cannula comprising:
- a cannula tube defining a passage configured to receive an instrument configured to be advanced through the cannula,
- the cannula tube having a proximal end opening and a distal end opening,
- the cannula tube having a first, tapered outer profile along a first length portion of the cannula tube that narrows in a proximal-to-distal direction along the first length portion of the cannula tube,
- the cannula tube having a second, flared outer portion along a second length portion of the cannula tube, the second length portion of the cannula tube being distal the first length portion of the cannula tube, and
- the cannula tube having a series of axially-spaced ribs extending radially from an outer lateral wall of the cannula tube at least partially along the first length portion of the cannula tube.
Dependencies are inferred from the claim text.