US 12,251,131 B2
Simplified surgical cannula
Edward J. Mikol, Pawleys Island, SC (US); and Hung T. Than, Rockville, MD (US)
Assigned to Edward Mikol, Pawleys Island, SC (US)
Filed by Edward J. Mikol, Pawleys Island, SC (US)
Filed on Dec. 8, 2021, as Appl. No. 17/545,292.
Application 17/545,292 is a continuation of application No. 16/568,816, filed on Sep. 12, 2019, granted, now 11,202,654.
Application 16/568,816 is a continuation in part of application No. 15/914,028, filed on Mar. 7, 2018, granted, now 10,709,475, issued on Jul. 14, 2020.
Application 16/568,816 is a continuation in part of application No. 15/914,041, filed on Mar. 7, 2018, granted, now 10,687,848, issued on Jun. 23, 2020.
Application 16/568,816 is a continuation in part of application No. 15/914,060, filed on Mar. 7, 2018, abandoned.
Prior Publication US 2022/0110655 A1, Apr. 14, 2022
Int. Cl. A61B 17/34 (2006.01); A61M 13/00 (2006.01); A61B 17/00 (2006.01)
CPC A61B 17/3423 (2013.01) [A61B 17/3498 (2013.01); A61M 13/003 (2013.01); A61B 2017/00407 (2013.01); A61B 2017/00477 (2013.01); A61B 2017/00557 (2013.01); A61B 2017/3419 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A cannula comprising:
a casing defining a lumen sized and dimensioned to receive one or more medical instruments,
a bellows,
an inflatable outer membrane attached to an outer surface of the casing,
at least one flow channel fluidly connecting the bellows to the outer membrane,
at least one activator comprising a rotating cap, and
a flow selector, wherein the flow selector is actuatable to open or close the at least one flow channel,
wherein the rotating cap is threadedly connected to the flow selector and the bellows is positioned between the rotating cap and the flow selector such that rotating the rotating cap activates the bellows to push a fluid contained in the cannula into the outer membrane to fill or pressurize the outer membrane,
wherein the flow selector comprises a dial disposed proximate to a proximal end of the cannula,
wherein the at least one flow channel is one of a plurality of flow channels in the cannula, and
wherein the dial comprises a rotatable layer overlying a port layer comprising a plurality of ports corresponding with and selectively in fluidic communication with said plurality of flow channels, wherein the rotatable layer is rotated to select the ports and the flow channels to open or close.