# US 9,433,757 B2 · Compact spring inserter for drug delivery infusion set > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,433,757 B2 - Document ID: US9433757B2 - Status: Granted - Kind: B2 - Application number: 14/002,210 - Filed: 2012-02-08 - Published: 2014-02-06 - Granted: 2016-09-06 - Earliest claimed: 2011-03-03 - Assignees: Becton, Dickinson and Company - Applicants: Cole Constantineau; Ryan Schoonmaker - Inventors: Cole Constantineau; Ryan Schoonmaker - Web page: https://patentgrep.com/patent/US9433757B2 ## CPC - A61M 25/0606: {"Over-the-needle" catheter assemblies, e.g. I.V. catheters} - A61M 5/158: Needles {for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body} - A61M 2005/1581: {Right-angle needle-type devices} - A61M 2005/1585: {Needle inserters} - A61M 2005/1586: {Holding accessories for holding infusion needles on the body} - A61M 2005/1587: {suitable for being connected to an infusion line after insertion into a patient} - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} ## Abstract An infusion set (101) includes a base (111) and an inserter (121) removably connected to the base (111). A catheter (134) is movable from a first catheter position disposed substantially entirely within the inserter (121) to a second catheter position' in which a free end of the catheter (134) is disposed externally of the base (111). An introducer needle (142) is located within the catheter (134) and is movable with the catheter (134) between a first introducer needle position disposed substantially entirely within the inserter (121) and a second introducer needle position in which a free end of the introducer needle (142) is disposed externally of the base (111). A spring member (171) moves the catheter (134) from the first to the second catheter position and the introducer needle (142) from the first to the second introducer needle position to facilitate insertion of the catheter (134). The spring member (171) is disposed substantially entirely within the base (111) when the catheter (134) is in the second catheter position. ## Claims ### Claim 1 An infusion set, comprising: a base; an inserter removably connected to said base and rotatable to initiate operation of said infusion set; a catheter movable from a first catheter position disposed substantially entirely within said inserter to a second catheter position upon rotation of said inserter in which a free end of said catheter is disposed externally of said base; an introducer needle located within said catheter and movable with said catheter between a first introducer needle position disposed substantially entirely within said inserter and a second introducer needle position upon rotation of said inserter in which a free end of said introducer needle is disposed externally of said base; and a spring member for moving said catheter from said first to said second catheter position and said introducer needle from said first to said second introducer needle position to facilitate insertion of said catheter, said spring member being disposed substantially entirely within said base when said catheter is in said second catheter position. ### Claim 2 (depends on 1) The infusion set in accordance with claim 1, wherein said spring member is a volute spring. ### Claim 3 (depends on 1) The infusion set in accordance with claim 1, wherein said spring member is activated by rotating said inserter relative to said base. ### Claim 4 (depends on 1) The infusion set in accordance with claim 1, wherein said inserter is removable from said base by rotating said inserter relative to said base when said catheter is in said second position. ### Claim 5 (depends on 4) The infusion set in accordance with claim 4, wherein said introducer needle is removable from said base with said inserter, said introducer needle being substantially entirely disposed within said removed inserter. ### Claim 6 (depends on 1) The infusion set in accordance with claim 1, wherein said introducer needle and said catheter enter a skin surface at a substantially perpendicular angle to the skin surface. ### Claim 7 (depends on 1) The infusion set in accordance with claim 1, wherein a septum disposed in said base is exposed by removal of said inserter to receive a fluid connector. ### Claim 8 (depends on 4) The infusion set in accordance with claim 4, wherein said catheter is locked to said base when said inserter is rotated for removal from said base. ### Claim 9 An infusion set, comprising: a base; an inserter removably connected to said base and rotatable to initiate operation of said infusion set; a catheter hub movable from a first catheter hub position to a second catheter hub position; a catheter connected to said catheter hub and movable from a first catheter position to a second catheter position upon rotation of said inserter, said catheter being disposed substantially entirely within said inserter when said catheter hub is in said first catheter hub position and said catheter is in said first catheter position and said catheter having a free disposed externally of said base when said catheter hub is in said second catheter hub position and said catheter is in said second catheter position; an introducer needle located within said catheter and movable with said catheter and said catheter hub from a first introducer needle position to a second introducer needle position upon rotation of said inserter, said introducer needle being disposed substantially entirely within said inserter when said introducer needle is in said first introducer needle position and said introducer needle having a free end disposed externally of said base when said introducer needle is in said second introducer needle position; and a spring member for moving said catheter hub, said catheter and said introducer needle, wherein prior to activating said spring member, said catheter hub, said catheter and said introducer needle are in said first catheter hub position, said first catheter position and said first introducer needle position, respectively, and when said spring member is activated, said catheter hub is moved to said second catheter hub position, said catheter is moved to said second catheter position and said introducer needle is moved to said second introducer needle position and then retracted to said first introducer hub position, said spring member being disposed entirely within said base when said catheter hub is in said second catheter hub position. ### Claim 10 (depends on 9) The infusion set in accordance with claim 9, wherein said catheter hub engages an inner shoulder of said inserter to retain said catheter hub in said first catheter hub position. ### Claim 11 (depends on 10) The infusion set in accordance with claim 10, wherein rotation of said inserter disengages said inner shoulder of said inserter from said catheter hub such that said spring member moves said catheter hub to said second catheter hub position. ### Claim 12 An infusion set, comprising: a base; an inserter removably connected to said base; a catheter hub movable from a first catheter hub position to a second catheter hub position; a catheter connected to said catheter hub and movable from a first catheter position to a second catheter position, said catheter being disposed substantially entirely within said inserter when said catheter hub is in said first catheter hub position and said catheter is in said first catheter position and said catheter having a free disposed externally of said base when said catheter hub is in said second catheter hub position and said catheter is in said second catheter position; an introducer needle located within said catheter and movable with said catheter and said catheter hub from a first introducer needle position to a second introducer needle position, said introducer needle being disposed substantially entirely within said inserter when said introducer needle is in said first introducer needle position and said introducer needle having a free end disposed externally of said base when said introducer needle is in said second introducer needle position; and a spring member for moving said catheter hub, said catheter and said introducer needle, wherein prior to activating said spring member, said catheter hub, said catheter and said introducer needle are in said first catheter hub position, said first catheter position and said first introducer needle position, respectively, and when said spring member is activated, said catheter hub is moved to said second catheter hub position, said catheter is moved to said second catheter position and said introducer needle is moved to said second introducer needle position and then retracted to said first introducer hub position, said spring member being disposed entirely within said base when said catheter hub is in said second catheter hub position, wherein said catheter hub engages an inner shoulder of said inserter to retain said catheter hub in said first catheter hub position, rotation of said inserter disengages said inner shoulder of said inserter from said catheter hub such that said spring member moves said catheter hub to said second catheter hub position, and rotation of said inserter when said catheter hub is in said second catheter hub position moves a locking member into engagement with said catheter hub to lock said catheter hub to said base. ### Claim 13 (depends on 11) The infusion set in accordance with claim 11, wherein rotation of said inserter when said catheter hub is in said second catheter hub position disengages said inserter from said base to remove said inserter from said base. ### Claim 14 (depends on 13) The infusion set in accordance with claim 13, wherein said introducer needle is removed from said base with said inserter, said introducer needle being substantially entirely disposed within said removed inserter. ### Claim 15 (depends on 9) The infusion set in accordance with claim 9, wherein a plunger is removably connected to said catheter hub; and said introducer needle is rigidly connected to said plunger. ### Claim 16 An infusion set, comprising: a base; an inserter removably connected to said base; a catheter hub movable from a first catheter hub position to a second catheter hub position; a catheter connected to said catheter hub and movable from a first catheter position to a second catheter position, said catheter being disposed substantially entirely within said inserter when said catheter hub is in said first catheter hub position and said catheter is in said first catheter position and said catheter having a free disposed externally of said base when said catheter hub is in said second catheter hub position and said catheter is in said second catheter position; an introducer needle located within said catheter and movable with said catheter and said catheter hub from a first introducer needle position to a second introducer needle position, said introducer needle being disposed substantially entirely within said inserter when said introducer needle is in said first introducer needle position and said introducer needle having a free end disposed externally of said base when said introducer needle is in said second introducer needle position; and a spring member for moving said catheter hub, said catheter and said introducer needle, wherein prior to activating said spring member, said catheter hub, said catheter and said introducer needle are in said first catheter hub position, said first catheter position and said first introducer needle position, respectively, and when said spring member is activated, said catheter hub is moved to said second catheter hub position, said catheter is moved to said second catheter position and said introducer needle is moved to said second introducer needle position and then retracted to said first introducer hub position, said spring member being disposed entirely within said base when said catheter hub is in said second catheter hub position, wherein a first end of said spring member is connected to said catheter hub and a second end of said spring member is connected to said base. ### Claim 17 A method of inserting a catheter of an infusion set, comprising the steps of disposing an infusion set base and an inserter on a skin surface at an injection site while said infusion set base is coupled to said inserter; rotating said inserter to activate a spring member; inserting an introducer needle and the catheter through the skin surface upon activation of the spring member of the inserter; removing the inserter from the infusion set base; and storing the spring member in the infusion set base. ### Claim 18 (depends on 17) The method of inserting a catheter of an infusion set in accordance with claim 17, wherein removing the inserter removes the introducer needle with the inserter. ### Claim 19 (depends on 17) The method of inserting a catheter of an infusion set in accordance with claim 17, wherein rotating the inserter after inserting the introducer needle and the catheter removes the inserter from the infusion set base and exposes a septum of the infusion set base to receive a fluid connector.