# US 2021/0330352 A1 · Access assembly with retention mechanism > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0330352 A1 - Document ID: US20210330352A1 - Status: Published application - Kind: A1 - Application number: 16/857,476 - Filed: 2020-04-24 - Published: 2021-10-28 - Earliest claimed: 2020-04-24 - Assignees: Covidien LP - Applicants: Covidien LP - Inventors: Astley C. Lobo; Kevin Desjardin; Douglas M. Pattison; Christopher A. Tokarz; Oksana Buyda; Amanda M. Adinolfi - Web page: https://patentgrep.com/patent/US20210330352A1 ## CPC - A61B 17/3421: {Cannulas} - A61B 17/3423: {Access ports, e.g. toroid shape introducers for instruments or hands (access sites for liquids A61M39/0247)} - A61B 2017/347: {Locking means, e.g. for locking instrument in cannula} - A61B 2017/3486: {Balloon} - A61B 2017/3492: {against the outside of the body} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A retention mechanism for a surgical access assembly is provided. The retention mechanism includes a planar base having first and second extensions each with a free end, a first locking member disposed on the free end of the first extension, and a second locking member disposed on the free end of the second extension. The first locking member includes a U-shaped body having a first set of opposed, inwardly facing teeth. The second locking member includes a U-shaped body having a first set of opposed, outwardly facing teeth configured engage the first set of opposed, inwardly facing teeth when the retention mechanism is in a locked condition. The first set of opposed, inwardly facing teeth and the first set of opposed, outwardly facing teeth are configured to be spaced apart from each other when the retention mechanism is in an unlocked condition. ## Claims ### Claim 1 A retention mechanism for a surgical access assembly, the retention mechanism comprising: a planar base having first and second extensions and defining an opening therethrough, the first and second extensions each including a free end; a first locking member disposed on the free end of the first extension, the first locking member including a U-shaped body having a first set of opposed, inwardly facing teeth; and a second locking member disposed on the free end of the second extension, the second locking member including a U-shaped body having a first set of opposed, outwardly facing teeth configured engage the first set of opposed, inwardly facing teeth when the retention mechanism is in a locked condition, wherein the first set of opposed, inwardly facing teeth and the first set of opposed, outwardly facing teeth are configured to be spaced apart from each other when the retention mechanism is in an unlocked condition. ### Claim 2 (depends on 1) The retention mechanism according to claim 1, wherein the first locking member includes a snap member disposed adjacent the first set of opposed, inwardly facing teeth and the second locking member includes a locking portion defining a recess for receiving the snap member of the first locking member. ### Claim 3 (depends on 2) The retention mechanism according to claim 2, wherein receipt of the snap member through the recess of the locking portion secures the first and second locking members relative to each other. ### Claim 4 (depends on 1) The retention mechanism according to claim 1, wherein the first locking member includes a second set of opposed, inwardly facing teeth and the second locking member includes a second set of opposed, outwardly facing teeth releasably engageable with the second set of opposed, inwardly facing teeth of the first locking member. ### Claim 5 (depends on 4) The retention mechanism according to claim 4, wherein the first locking member includes a snap member disposed between each of the first and second sets of opposed, inwardly facing teeth, and the second locking member includes a locking portion defining a recess disposed between each of the first and second sets of opposed, outwardly facing teeth of the second locking member. ### Claim 6 (depends on 5) The retention mechanism according to claim 5, wherein the snap members are configured to be received within the recess of the locking portions to secure the first locking member relative to the second locking member. ### Claim 7 (depends on 6) The retention mechanism according to claim 6, wherein receipt of the snap members within the recess of the locking portions secures the first and second locking members relative to each other. ### Claim 8 (depends on 1) The retention mechanism according to claim 1, wherein the second locking member includes button members for facilitating movement of the first set of opposed, outwardly facing teeth relative to the first set of opposed, inwardly facing teeth. ### Claim 9 (depends on 1) The retention mechanism according to claim 1, wherein each of the first and second extensions includes a narrow portion to permit folding of the respective first and second extensions relative to the planar base. ### Claim 10 (depends on 1) The retention mechanism according to claim 1, wherein the first and second extensions are configured to receive sutures. ### Claim 11 A surgical access assembly comprising: a cannula having a distal portion and a length; an anchor mechanism disposed on the distal portion of the cannula; and a retention mechanism receivable about the length of the cannula, the retention mechanism including: a first locking member including a U-shaped body having a first set of opposed, inwardly facing teeth; and a second locking member including a U-shaped body having a first set of opposed, outwardly facing teeth configured to engage the first set of opposed, inwardly facing teeth when the retention mechanism is in a locked condition and to be spaced apart from the first set of opposed, inwardly facing teeth when the retention mechanism is in an unlocked condition. ### Claim 12 (depends on 11) The surgical access assembly according to claim 11, wherein the first locking member includes a snap member disposed adjacent the first set of opposed, inwardly facing teeth and the second locking member includes a locking portion defining a recess for receiving the snap member of the first locking member. ### Claim 13 (depends on 12) The surgical access assembly according to claim 12, wherein receipt of the snap member through the recess of the locking portion secures the first and second locking members relative to each other. ### Claim 14 (depends on 11) The surgical access assembly according to claim 11, wherein the first locking member includes a second set of opposed, inwardly facing teeth and the second locking member includes a second set of opposed, outwardly facing teeth releasably engageable with the second set of opposed, inwardly facing teeth of the first locking member. ### Claim 15 (depends on 14) The surgical access assembly according to claim 14, wherein the first locking member includes a snap member disposed between each of the first and second sets of opposed, inwardly facing teeth, and the second locking member includes a locking portion defining a recess disposed between each of the first and second sets of opposed, outwardly facing teeth of the second locking member. ### Claim 16 (depends on 15) The surgical access assembly according to claim 15, wherein the snap members are configured to be received within the recess of the locking portions to secure the first locking member relative to the second locking member. ### Claim 17 (depends on 6) The surgical access assembly according to claim 6, wherein receipt of the snap members within the recess of the locking portions secures the first and second locking members relative to each other. ### Claim 18 (depends on 11) The surgical access assembly according to claim 11, wherein the second locking member includes button members for facilitating movement of the first set of opposed, outwardly facing teeth relative to the first set of opposed, inwardly facing teeth. ### Claim 19 (depends on 11) The surgical access assembly according to claim 11, wherein the anchor mechanism includes an inflatable balloon. ### Claim 20 (depends on 11) The surgical access assembly according to claim 11, further including a foam block positionable about the cannula between the anchor mechanism and the retention mechanism.