NZ740840B2 - System and method for syringe plunger engagement with an injector - Google Patents

System and method for syringe plunger engagement with an injector

Info

Publication number
NZ740840B2
NZ740840B2 NZ740840A NZ74084016A NZ740840B2 NZ 740840 B2 NZ740840 B2 NZ 740840B2 NZ 740840 A NZ740840 A NZ 740840A NZ 74084016 A NZ74084016 A NZ 74084016A NZ 740840 B2 NZ740840 B2 NZ 740840B2
Authority
NZ
New Zealand
Prior art keywords
plunger
segment
resiliently deflectable
retaining member
deflectable retaining
Prior art date
Application number
NZ740840A
Other versions
NZ740840A (en
Inventor
Christopher D Capone
Kevin P Cowan
James A Dedig
Richard A Seman
Michael J Swantner
Barry L Tucker
Arthur E Uber Iii
Original Assignee
Bayer Healthcare Llc
Filing date
Publication date
Priority claimed from US14/925,722 external-priority patent/US9480797B1/en
Application filed by Bayer Healthcare Llc filed Critical Bayer Healthcare Llc
Publication of NZ740840A publication Critical patent/NZ740840A/en
Publication of NZ740840B2 publication Critical patent/NZ740840B2/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
    • A61M5/14546—Front-loading type injectors
    • A61M2005/14553—Front-loading type injectors comprising a pressure jacket
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
    • A61M2005/14573—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons with a replaceable reservoir for quick connection/disconnection with a driving system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/332—Force measuring means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/007—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests for contrast media
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
    • A61M5/14546—Front-loading type injectors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
    • A61M5/14566—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons with a replaceable reservoir for receiving a piston rod of the pump
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
    • A61M5/31513—Piston constructions to improve sealing or sliding
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
    • A61M5/31515—Connection of piston with piston rod

Abstract

plunger for use with a syringe has a plunger body with a proximal end, a distal end, and a circumferential sidewall extending between the proximal end and the distal end along a plunger longitudinal axis. The plunger further has at least one resiliently deflectable retaining member having a first segment attached to the plunger body and a second segment protruding toward the distal end of the plunger body and deflectable relative to the first segment. The plunger further has at least one actuation member associated with the at least one resiliently deflectable retaining member. The at least one actuation member interacts with a piston to deflect the at least one resiliently deflectable retaining member upon rotation of the plunger relative to the piston. The plunger is engagable with the piston regardless of a rotational orientation of the piston relative to the plunger.

Claims (28)

WE CLAIM:
1. A plunger for use with a syringe, the plunger comprising: a plunger body having a proximal end, a distal end, and a circumferential sidewall extending between the proximal end and the distal end along a plunger longitudinal axis; at least one resiliently deflectable retaining member having a first segment attached to the plunger body and a second segment protruding from the first segment toward the distal end of the plunger body and deflectable relative to the first segment; and at least one actuation member associated with the at least one resiliently deflectable retaining member, wherein the at least one actuation member interacts with a piston used to engage the plunger to deflect the at least one resiliently deflectable retaining member upon rotation of the plunger relative to the piston during disengagement of the plunger from the piston.
2. The plunger according to claim 1, further comprising at least one alignment member associated with the plunger body or the at least one resiliently deflectable retaining member, the at least one alignment member having an alignment surface for guiding the piston into self-orienting alignment with the plunger during engagement of the plunger with the piston.
3. The plunger according to claim 2, wherein the at least one alignment member comprises a plurality of alignment members spaced apart around the plunger longitudinal axis.
4. The plunger according to claim 3, wherein the plurality of alignment members are spaced apart at equal radial intervals around the plunger longitudinal axis.
5. The plunger according to any one of claims 1-4, wherein the second segment of the at least one resiliently deflectable retaining member is deflectable radially relative to the first segment away from the plunger longitudinal axis. 20530182_1 (GHMatters) P116752.NZ
6. The plunger according to any one of claims 1-5, wherein the at least one resiliently deflectable retaining member is linearly or curvilinearly contiguous between the first segment and the second segment.
7. The plunger according to any one of claims 1-5, wherein the second segment of the at least one resiliently deflectable retaining member is angled toward the plunger longitudinal axis.
8. The plunger according to any one of claims 1-7, wherein the at least one actuation member is provided on a surface of the at least one resiliently deflectable retaining member.
9. The plunger according to claim 8, wherein the at least one actuation member is at the second segment of the at least one resiliently deflectable retaining member.
10. The plunger according to any one of claims 1-9, wherein the at least one actuation member is angled relative to a plane defined by a body of the at least one resiliently deflectable retaining member.
11. The plunger according to any one of claims 1-10, wherein the at least one resiliently deflectable retaining member comprises a plurality of resiliently deflectable retaining members spaced apart around the plunger longitudinal axis.
12. The plunger according to claim 11, wherein the plurality of resiliently deflectable retaining members is spaced apart at equal radial intervals around the plunger longitudinal axis.
13. The plunger according to any one of claims 1-12, wherein a terminal surface of the second segment of the at least one resiliently deflectable retaining member engages a surface of the piston to releasably lock the plunger with the piston.
14. The plunger according to claim 13, wherein the terminal surface is linear. 20530182_1 (GHMatters) P116752.NZ
15. The plunger according to claim 13, wherein the terminal surface is perpendicular or angled relative to a direction of the plunger longitudinal axis.
16. The plunger according to any one of claims 1-15, wherein the plunger body defines an interior cavity with a conical-shaped portion at the distal end of the plunger body and a cylindrical-shaped portion at the proximal end of the plunger body.
17. The plunger according to claim 16, wherein the first segment of the at least one resiliently deflectable member is attached to an inner surface of the plunger body.
18. The plunger according to claim 17, wherein the at least one resiliently deflectable retaining member protrudes from the inner surface of the plunger body into the interior cavity.
19. The plunger according to any one of claims 1-18, further comprising a plunger cover disposed over at least a portion of an outer surface of the plunger body, the plunger cover comprising a resilient seal disposed around at least a portion of a circumferential sidewall of the plunger cover.
20. The plunger according to claim 19, wherein the resilient seal comprises an inner surface at least partially seated in a groove in the circumferential sidewall of the plunger body and an outer surface adapted to slidably engage with a barrel of a syringe.
21. The plunger according to any one of claims 1-20, wherein the at least one actuation member is a cam member.
22. A plunger for use with a syringe, the plunger comprising: a plunger body having a proximal end, a distal end, and a circumferential sidewall extending between the proximal end and the distal end along a plunger longitudinal axis; at least one resiliently deflectable retaining member having a first segment attached to the plunger body and a second segment protruding from the first segment toward the distal end of the plunger body and deflectable relative to the first segment; and 20530182_1 (GHMatters) P116752.NZ at least one alignment member associated with the plunger body or the at least one resiliently deflectable retaining member, wherein the at least one alignment member guides a piston into self-orienting alignment with the plunger during engagement of the plunger with the piston.
23. The plunger according to claim 22, further comprising at least one actuation member associated with the at least one resiliently deflectable retaining member, wherein the at least one actuation member interacts with the piston to deflect the at least one resiliently deflectable retaining member upon rotation of the plunger relative to the piston during disengagement of the plunger from the piston.
24. The plunger according to claim 22 or claim 23, wherein a terminal surface of the second segment of the at least one resiliently deflectable retaining member engages a surface of the piston to releasably lock the plunger with the piston.
25. The plunger according to claim 23 or claim 24, wherein the at least one actuation member is at the second segment of the at least one resiliently deflectable retaining member.
26. The plunger according to any one of claims 22-25, wherein the second segment of the at least one resiliently deflectable retaining member is deflectable radially relative to the first segment away from the plunger longitudinal axis.
27. The plunger according to claim 1 or claim 22, wherein the second segment of the at least one resiliently deflectable retaining member protrudes in a direction circumferentially around the longitudinal axis of the plunger body and wherein the second segment of the at least one resiliently deflectable retaining member is deflectable circumferentially relative to the first segment.
28. A syringe comprising: a barrel having a barrel proximal end, a barrel distal end having a discharge nozzle, and a barrel sidewall extending between the barrel proximal end and the barrel distal end; and 20530182_1 (GHMatters) P116752.NZ a plunger slidably disposed within the barrel and reciprocally movable between the barrel proximal end and the barrel distal end, the plunger comprising: a plunger body having a proximal end, a distal end, and a circumferential sidewall extending between the proximal end and the distal end along a plunger longitudinal axis; at least one resiliently deflectable retaining member having a first segment attached to the plunger body and a second segment protruding from the first segment toward the distal end of the plunger body and deflectable relative to the first segment; at least one actuation member associated with the at least one resiliently deflectable retaining member, wherein the at least one actuation member interacts with a piston used to engage the plunger to radially deflect the at least one resiliently deflectable retaining member upon rotation of the plunger relative to the piston during disengagement of the plunger from the piston.
NZ740840A 2016-10-28 System and method for syringe plunger engagement with an injector NZ740840B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14/925,722 US9480797B1 (en) 2015-10-28 2015-10-28 System and method for syringe plunger engagement with an injector
PCT/US2016/059246 WO2017075303A1 (en) 2015-10-28 2016-10-28 System and method for syringe plunger engagement with an injector

Publications (2)

Publication Number Publication Date
NZ740840A NZ740840A (en) 2024-01-26
NZ740840B2 true NZ740840B2 (en) 2024-04-30

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