US 12,005,177 B2
Self-sealing cannula
Zhongjun Wu, Marriottsville, MD (US); Bartley P. Griffith, Gibson Island, MD (US); and Keshava Rajagopal, Sugar Land, TX (US)
Assigned to University of Maryland, Baltimore, Baltimore, MD (US)
Filed by University of Maryland, Baltimore, Baltimore, MD (US)
Filed on Jun. 3, 2020, as Appl. No. 16/891,655.
Application 16/891,655 is a continuation of application No. 15/526,107, granted, now 10,695,483, previously published as PCT/US2015/060127, filed on Nov. 11, 2015.
Claims priority of provisional application 62/079,876, filed on Nov. 14, 2014.
Prior Publication US 2020/0405944 A1, Dec. 31, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 1/36 (2006.01); A61B 17/00 (2006.01); A61B 17/34 (2006.01); A61M 60/178 (2021.01); A61M 60/38 (2021.01); A61M 60/857 (2021.01); A61M 60/861 (2021.01); A61M 60/148 (2021.01)
CPC A61M 1/3659 (2014.02) [A61B 17/3417 (2013.01); A61B 17/3421 (2013.01); A61B 17/3439 (2013.01); A61M 60/178 (2021.01); A61M 60/38 (2021.01); A61M 60/857 (2021.01); A61M 60/861 (2021.01); A61B 2017/00247 (2013.01); A61B 2017/3419 (2013.01); A61B 2017/3425 (2013.01); A61M 60/148 (2021.01)] 19 Claims
OG exemplary drawing
 
1. A self-sealing cannula system, comprising:
an elongated first cannula; and
a flexible, self-sealing closure attached to said first cannula, said closure comprising a hollow, elongate structure defining an open interior and a first connector on an interior of said open interior, said first cannula having a second connector configured for removable attachment to said first connector, and wherein said closure further comprises an integrally-formed self-sealing shutter;
wherein said self-sealing closure is configured to expand radially from a compressed state to an uncompressed state, wherein in said uncompressed state said self-sealing closure is configured to seal against an interior surface and an exterior surface of an insertion site of said first cannula; and
wherein said self-sealing shutter is further configured to close a central hole of the shutter when the first cannula is not inserted therein, and is expandable to open when the first cannula is inserted therein.