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
A61M5/315 Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod; or piston; Appliances on the rod for facilitating dosing; ; Dosing mechanisms
A61M5/31565 Administration mechanisms, i.e. constructional features, modes of administering a dose