EP1830906A1 - Tige de piston segmentee - Google Patents

Tige de piston segmentee

Info

Publication number
EP1830906A1
EP1830906A1 EP05850348A EP05850348A EP1830906A1 EP 1830906 A1 EP1830906 A1 EP 1830906A1 EP 05850348 A EP05850348 A EP 05850348A EP 05850348 A EP05850348 A EP 05850348A EP 1830906 A1 EP1830906 A1 EP 1830906A1
Authority
EP
European Patent Office
Prior art keywords
segments
piston rod
segment
rod according
stack
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05850348A
Other languages
German (de)
English (en)
Inventor
Bo Radmer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Novo Nordisk AS
Original Assignee
Novo Nordisk AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Novo Nordisk AS filed Critical Novo Nordisk AS
Priority to EP05850348A priority Critical patent/EP1830906A1/fr
Publication of EP1830906A1 publication Critical patent/EP1830906A1/fr
Withdrawn legal-status Critical Current

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
    • A61M5/178—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
    • A61M5/31533—Dosing mechanisms, i.e. setting a dose
    • A61M5/31545—Setting modes for dosing
    • A61M5/31548—Mechanically operated dose setting member
    • A61M5/3155—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe
    • 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
    • A61M2005/31518—Piston or piston-rod constructions, e.g. connection of piston with piston-rod designed to reduce the overall size of an injection device, e.g. using flexible or pivotally connected chain-like rod members
    • 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
    • A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
    • 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
    • A61M5/31533—Dosing mechanisms, i.e. setting a dose
    • A61M5/31545—Setting modes for dosing
    • A61M5/31548—Mechanically operated dose setting member
    • A61M5/3155—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe
    • A61M5/31551—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe including axial movement of dose setting member
    • 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
    • A61M5/31533—Dosing mechanisms, i.e. setting a dose
    • A61M5/31545—Setting modes for dosing
    • A61M5/31548—Mechanically operated dose setting member
    • A61M5/31556—Accuracy improving means
    • A61M5/31558—Accuracy improving means using scaling up or down transmissions, e.g. gearbox
    • 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
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/31576—Constructional features or modes of drive mechanisms for piston rods
    • A61M5/31583—Constructional features or modes of drive mechanisms for piston rods based on rotational translation, i.e. movement of piston rod is caused by relative rotation between the user activated actuator and the piston rod
    • A61M5/31585—Constructional features or modes of drive mechanisms for piston rods based on rotational translation, i.e. movement of piston rod is caused by relative rotation between the user activated actuator and the piston rod performed by axially moving actuator, e.g. an injection button
    • 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
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/3159—Dose expelling manners
    • A61M5/31593—Multi-dose, i.e. individually set dose repeatedly administered from the same medicament reservoir

Definitions

  • the present invention relates to a segmented piston rod.
  • the present invention relates to a segmented piston rod for use in syringe devices such as in medication or injection delivery devices.
  • US 5,514,097 discloses a medicament injection apparatus for subcutaneous or intramuscular delivery of a medicament.
  • the apparatus conceals a needle behind a needle shroud.
  • the needle On apparatus activation, the needle is trust forward, pushing the needle tip outside the needle shroud with enough force to puncture the skin.
  • the needle is thus automatically introduced into the tissue at the proper needle skin orientation.
  • the apparatus automatically dispenses an accurate pre-set dose of medicament.
  • the dose can be set by a manual, variable dosing assembly or by an automatic dosing assembly.
  • US 2002/0016571 relates to a device for administering an injectable medicament in doses.
  • the device according to US 2002/0016571 comprises among other elements a reservoir for the medicament and a piston which forces the medicament out of the reservoir when moved in a feed direction towards a reservoir outlet.
  • the piston for forcing the medicament out of its reservoir is a stiff and rigid element having a constant and thereby non-variable length.
  • US 6,508,788 discloses a medication delivery device comprising a container containing a fluid medicament.
  • the medicament is expelled from the container by moving forward an elastomeric piston inside a cartridge.
  • the piston is moved forward by a telescopic piston rod, which can either be centrally located in the container or eccentric located.
  • One end of the telescopic piston rod abuts the elastomeric piston either by itself or through an additional plate. The abutment proves a friction large enough to prevent a lower part of the telescopic rod from rotating.
  • a piston rod for a syringe device comprising a plurality of axially arranged segments forming a stack of segments having a base length, the plurality of segments being rotatable relative to each other, wherein at least two of the plurality of segments each comprises at least one inclined surface relative to the axial direction of the piston rod so that a relative rotation between these two segments causes the length of the stack of segments to change.
  • One or more segments may be adapted to be rotated between an initial and an end position.
  • the angle of rotation between the initial and the end position may in principle be from just a few degrees and up to 360 degrees.
  • a first locking arrangement may be provided.
  • the first locking mechanism may be adapted to fixate any of the plurality of segments in a position between a segment's initial and end position so as to provide a infinitely expendable piston rod.
  • the first locking mechanism is applied during the expansion of the length of the stack of segments.
  • This first locking mechanism may be implemented as a key/keyway connection between the segments and an interior surface part of an associated syringe device.
  • a second locking arrangement may be provided. This second locking mechanism may be implemented as mechanism working directly between two neighbouring segments when a segment is brought into its outer most position relative an abutting segment.
  • the second locking mechanism may be implemented in various ways, such as ripples formed as microstructures on a surface part of the segments, edges or indentations formed on a surface part of the segments.
  • Each segment may, in a plane substantially perpendicular to the axial direction of the piston rod, be constituted by at least two substantially identical portions. In one embodiment, each segment is constituted by two substantially identical portions each having at least one inclined surface. In another embodiment, each segment may, in a plane substantially perpendicular to the axial direction of the piston rod, have a helical- formed inclined surface.
  • the stack of segments may comprise between 5 and 30 segments, such as between 10 and 20 segments.
  • Each or just some of the segments may be made of metal or made of a polymer-based material, such as plastic.
  • the segments could be fabricated using a stamping process, or alternatively, the segments could be sintered from a metal powder.
  • each segment may be adapted to fit within a cartridge of an associated syringe device meaning that the diameter of each segment may be within the range between 5 and 15 mm, such as approximately 10 mm.
  • the present invention relates to a syringe device comprising a piston rod according to the first aspect.
  • the syringe device may be a medication delivery device or any other kind of injection device.
  • the present invention relates to a segment for a segmented piston rod for a syringe device, the segment comprising an inclined surface relative to an axial direction of the piston rod so that a relative rotation between the segment and another segment causes the length of the segmented piston rod to change.
  • FIG. 1 shows a first embodiment of the piston rod according to present invention
  • Fig. 2 shows a second embodiment of the piston rod according to the present invention
  • Fig. 3 shows an example of the piston rod according to the present invention when said piston rod is installed in a medication delivery device.
  • a piston rod is formed by a plurality of segments arranged to form a stack of segments.
  • the segments forming the stack are rotatable relative to each other so that for example one or more segment may be kept at a fixed orientation whereas one or more other segments may be rotated relative to the one or more fixed segments.
  • at least two of the segments must have an inclined surface so that a relative rotation between these two segments expands the overall length of the stack of segments forming the piston rod.
  • the stack of segments may be formed by identical segments, or it may be formed by sets of segments, where each set of segments is formed by a base segment and a rotating segment. Alternatively, the stack of segments may be formed by a combination of a set or sets of segments and identical segments.
  • the diameter of the segments forming the stack of segments may in principle be arbitrary. However, in order to use the stack of segments as a piston rod in a medication delivery device, the diameter of the segments must fit within the cartridge holding the medicament to be ejected from the mediation delivery device. Segments according to the present invention would preferably be within the range between 5 and 15 mm, such as approximately 10 mm.
  • Fig. 1 shows an embodiment of the present invention.
  • Fig. Ia shows an isolated segment according to this embodiment
  • Fig. Ib shows a stack of segments in a non-expanded state
  • Fig. Ic shows the stack of segment in an expanded state.
  • the segment 1 is constituted by two identical half's 2 and 3.
  • Each half comprises a mechanical stop mechanism 4 and two oppositely inclining surfaces 5 and 6.
  • the inclining surfaces incline over angle corresponding to 180 degrees and terminate at the mechanical stop 4.
  • the inclining angle will depend on the number of segments forming the stack. In case 15 segments form the stack, and the stack should be capable of expanding a distance of 50 mm, each segment shall contribute to the expansion is within 3.3 mm.
  • Fig. Ib shows a stack formed by three segments 7, 8, and 9.
  • Fig. Ic shows an example where all three segments (7, 8, and 9) have been rotated relative to each other. However, none of the segments shown in Fig. Ic have reached their outermost positions which means that the overall length of the stack of segments shown in Fig. Ic may be further increased.
  • Fig. 2 shows another embodiment of the present invention.
  • Fig. 2a shows an isolated segment
  • Fig. 2b shows three segments arranged in a stack in an unexpanded state
  • Fig. 2c shows two segments arranged to form an expanded state of a stack.
  • each segment 10 is constituted by two identical half's 11 and 12 - see Fig. 2a.
  • Each half comprises a stop mechanism in form of a stop surface 13, and an inclined surface 14.
  • Fig. 2b shows how three segments can form a stack in its unexpanded state.
  • Fig. 2c shows the expanded state of a stack formed by two segments. As seen the two segments 15 and 16 are rotated relative to each other whereby the overall length of the stack is significantly increased. In the illustration shown in Fig. 2c the segments 15 and 16 are close to their mutual outermost position and a fixation means will lock the two segments together if segment 16 is rotated further in the counterclockwise direction relative to segment 15.
  • Fig. 3 shows the segmented piston rod according to the present invention positioned in a medication delivery device 26.
  • the segmented piston rod is operated as follows:
  • the dose to be ejected is set by rotating the scale drum 17 upwards in the inner housing threads 18.
  • a rosette 19 between the scale drum and a connector pipe 20 is pushing the connector pipe 20 upwards.
  • the connector pipe 20 is prevented from rotating by a dosage cup 21.
  • the dosage cup 21 is locked by a one-way ratchet (not shown) with the housing of the medication delivery device.
  • the button 22 When a dose is to be delivered from the medication delivery device the button 22 needs to be pushed down. When the button 22 is pushed down the scale drum 17 and the connector pipe 20 causes the dosage cup 21 to rotate. When the dosage cup 21 is rotating, the idle segments 23 (the segments closest to the dosage cup 21) will rotate with the dosage cup 21. The segment to be pushed forward 24 (towards the cartridge) is prevented from rotating. In order to prevent the segment 24 abutting the cartridge from rotating this segment 24 may have a key/keyway connection (not shown) with the housing of the medication delivery device. By keeping the segment 24 in a fixed relation with the housing a relative rotation between segments 23 and segment 24 is provided whereby segment 24 is pushed in a direction towards the cartridge.
  • segment 24 When segment 24 has reached its end position it is released from the key/keyway connection (or other type of locking arrangement). In case another segment has previously pushed towards the cartridge, the segment just released from the locking arrangement is locked to that segment. This is in fact illustrated in Fig. 3 where segment 25 has previously been pushed towards the cartridge.
  • segment 24 When segment 24 has been released, the next segment (the segment of segments 23 being closest to the cartridge) is locked to the housing and is now being pushed in the direction towards the cartridge upon rotation of the segment or segments between the locked segment and the dosage cup 21.

Landscapes

  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

L'invention concerne une tige de piston pour un dispositif de seringue, cette tige de piston comprenant plusieurs segments (1) disposés axialement et formant un empilement de segments possédant une certaine longueur de base, ces segments (1) étant rotatifs les uns par rapport aux autres. Dans l'empilement de segments, au moins deux segments parmi l'ensemble de segments (1) comprennent chacun une surface inclinée (5) par rapport à la direction axiale de la tige de piston de façon qu'une rotation relative entre ces deux segments provoque la modification de la longueur de l'empilement de segments.
EP05850348A 2004-12-23 2005-12-23 Tige de piston segmentee Withdrawn EP1830906A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05850348A EP1830906A1 (fr) 2004-12-23 2005-12-23 Tige de piston segmentee

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP04078497 2004-12-23
EP05850348A EP1830906A1 (fr) 2004-12-23 2005-12-23 Tige de piston segmentee
PCT/EP2005/013986 WO2006066963A1 (fr) 2004-12-23 2005-12-23 Tige de piston segmentee

Publications (1)

Publication Number Publication Date
EP1830906A1 true EP1830906A1 (fr) 2007-09-12

Family

ID=34928772

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05850348A Withdrawn EP1830906A1 (fr) 2004-12-23 2005-12-23 Tige de piston segmentee

Country Status (3)

Country Link
EP (1) EP1830906A1 (fr)
JP (1) JP2008525070A (fr)
WO (1) WO2006066963A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110778578A (zh) * 2018-07-27 2020-02-11 斯塔比卢斯有限责任公司 取向设备、载体设备、坐具以及制造取向设备的方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2743207C (fr) * 2010-06-18 2023-06-06 Becton, Dickinson And Company Piston-plongeur a butee de dosage reglable
EP3154611B1 (fr) * 2014-06-10 2020-07-08 SHL Medical AG Segments de piston mécanisme d'entraînement pour un dispositif d'administration de médicament
HUE064866T2 (hu) 2016-03-21 2024-04-28 Lilly Co Eli Orvosi adagoló eszköz tengelyirányban kinyújtható meghajtóelemmel
BR102017016174B1 (pt) * 2017-07-27 2020-08-11 Doris Maria Hexsel Dispositivo envoltório para dispensar produtos tópicos para uso oral, vulvar e anal, acoplável a aplicador portátil para usos vaginal e retal
JP6965451B2 (ja) 2017-12-08 2021-11-10 イーライ リリー アンド カンパニー 軸方向に拡張可能な駆動リボンを有する医療用送達デバイス
WO2023150095A1 (fr) * 2022-02-07 2023-08-10 Becton, Dickinson And Company Dispositifs d'injection de type stylo avec configurations de tige de piston télescopique en plusieurs parties

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB624801A (en) * 1946-06-05 1949-06-16 Ake Torgny Bergqvist Locking device for tubes of telescopic structures
US5514097A (en) * 1994-02-14 1996-05-07 Genentech, Inc. Self administered injection pen apparatus and method
DE19900792C1 (de) * 1999-01-12 2000-06-15 Disetronic Licensing Ag Vorrichtung zur Verabreichung eines injizierbaren Produkts

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006066963A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110778578A (zh) * 2018-07-27 2020-02-11 斯塔比卢斯有限责任公司 取向设备、载体设备、坐具以及制造取向设备的方法

Also Published As

Publication number Publication date
JP2008525070A (ja) 2008-07-17
WO2006066963A1 (fr) 2006-06-29

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