WO2012004804A1 - Seringue rétractable - Google Patents

Seringue rétractable

Info

Publication number
WO2012004804A1
WO2012004804A1 PCT/IN2011/000230 IN2011000230W WO2012004804A1 WO 2012004804 A1 WO2012004804 A1 WO 2012004804A1 IN 2011000230 W IN2011000230 W IN 2011000230W WO 2012004804 A1 WO2012004804 A1 WO 2012004804A1
Authority
WO
WIPO (PCT)
Prior art keywords
needle
barrel
plunger
needle mount
retractable syringe
Prior art date
Application number
PCT/IN2011/000230
Other languages
English (en)
Inventor
Jose Olavo Cotta
Original Assignee
Indalia Medical Devices Private Ltd
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 Indalia Medical Devices Private Ltd filed Critical Indalia Medical Devices Private Ltd
Publication of WO2012004804A1 publication Critical patent/WO2012004804A1/fr

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
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • 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
    • A61M5/3129—Syringe barrels
    • A61M5/3137—Specially designed finger grip means, e.g. for easy manipulation of the syringe rod
    • A61M2005/3139—Finger grips not integrally formed with the syringe barrel, e.g. using adapter with finger grips

Definitions

  • the present invention relates to single use and safe syringe and more particularly a retractable syringe wherein the needle is safely retracted within the barrel to prevent the syringe from being re-used .
  • US patent no.5163907 describes a hypodermic syringe made up of a retractable needle assembly ,a barrel and a plunger
  • the needle assembly and the barrel are attached in such a way that they may be separated and plunger and the needle assembly are adapted to be secured together.
  • the plunger is pushed all the way forward , the plunger and the needle assembly become secured to each other .
  • the needle is retracted.
  • US patent Pub.No.US2004/0186428Al deals with an auto-destructible syringe comprising a syringe barrel having an inner wall ,a proximal end and a distal end; a plunger slidably disposed within the syringe barrel; stopper means on the inner wall of the syringe barrel for preventing the syringe plunger from moving towards the distal end; grooves on the plunger alignable with the stopper means by axially rotating the plunger relative to the barrel: and cutting means connected to the plunger.
  • the plunger When the stopper means are aligned with the grooves , the plunger can move towards the distal end of the syringe barrel
  • the cutting means cut the barrel when the plunger moves towards the distal end of the syringe barrel perforating the syringe barrel and preventing subsequent use of the syringe.
  • US patent No.5,084,017 deal with a single use ,hypodermic syringe which disables itself during its initial application there by preventing any subsequent use of the syringe.
  • the working parts of the invention are designed to separate automatically when the syringe is oriented into the solution dispensing mode. These separated parts prevent subsequent aspiration of solutions into the syringe thereby rendering the syringe inoperable and unusable after its initial use.
  • US patent No.7,090,657 B2 describes an auto-disable safety syringe including a needle, needle seat, a plunger, and a barrel.
  • a cover of a needle seat formed in the needle seat is provided with a splined hole having teeth and grooves.
  • the needle seat has a ring block and an outer wall with splined teeth capable of passing through the grooves.
  • a locking groove is formed in a cavity of the ring block and a locking head is formed on a connecting head to form a locking mechanism. Spiral grooves on the inner cavity engage with protrusions on the connecting head.
  • US Patent No.5820605 describes a retractable syringe which includes a barrel ,one end of which comprises a mounting collar
  • a needle carrier is releasably mounted within the collar and releasably supports a needle cartridge.
  • a sheath attaches at one end of the cartridge and at the other end of the collar.
  • a plunger is telescoped into the barrel and includes a piston sealingly engaging the barrel.
  • the piston includes a latch for engaging the carrier and releasing it from the collar.
  • the piston and the carrier also include an anti -remount mechanism preventing the carrier from being reengaged into the collar.
  • the plunger further includes surfaces to displace fluid as the piston is forced towards the proximal end of the barrel to displace fluid to reduce squirt.
  • a cap is also provided to initially seal of the proximal end of the barrel and after usage to form a seal by engaging teeth within the proximal end of the barrel
  • US Patent Pub No. US2008/0039788 Al describes 'a syringe with retractable needle' - having a syringe retraction arrangement which includes a retaining means mounted on the syringe barrel to retain the syringe within a sleeve assembly on retraction of the hypodermic needle into the sleeve assembly.
  • the retaining means includes at least one extension ,the extension extending outwardly in a radial direction and towards a needle end of the sleeve assembly where the needle resides and wherein the free end of the at least one extension engages an abutment acting as a bearing surface for the at least one extension thereby retaining the syringe within the sleeve assembly after retraction.
  • Another object of present invention is provide a retractable syringe with minimum components for ease in manufacturing.
  • Yet another object is to provide a retractable syringe which is cost-effective and suitable for mass use.
  • a syringe comprising a barrel, a plunger operable within the barrel and a needle mount having a deformable securing portion.
  • the surface of the needle mount made up of flexible material -in contact with the barrel helps in disengageably retain the needle mount at one end of the barrel.
  • the mechanism for this engagement is mechanical as well as adhesive force between the barrel and needle mount.
  • the securing portion of the needle mount cooperates with the engaging means at the tip of the plunger,
  • the syringe further comprising means on the plunger to deform the securing portion on the needle mount .
  • the snap lock between the plunger tip and the cooperable means on the needle mount is capable of engaging the needle mount for withdrawal of the needle mount into the barrel when the plunger or a portion thereof engaged with the needle mount is displaced away from said one end of the barrel.
  • the automatic disengagement of the needle mount securing portion from the barrel by the plunger as the syringe is emptied is particularly convenient as no additional operations need be performed to ensure such disengagement of the needle mount.
  • Fig 2. shows the plunger of the Syringe pulled to draw the solution.
  • Fig 3 shows the position of the Syringe when the solution is injected.
  • Fig 4 is the view of the Syringe at the end of the intended use showing the retraction mechanism engaged.
  • Fig 5 is the view of the Syringe with the needle holder(needle mount assembly ) and the needle retracted into the barrel.
  • Fig 6 is the view of the Syringe with the plunger broken and the needle safely trapped in to the barrel.
  • Fig 7 is the view of the Syringe components shown separately
  • Fig .8 is the view of the Syringe components when assembled.
  • Fig. 9 is the individual view of 1) Plunger 2) Needle holder with needle 3)Barrel
  • the present invention is a syringe which is composed of three components.
  • a plunger operable within the barrel
  • a needle mount made up of flexible material.
  • the barrel (No 1). is preferably made of polypropylene.
  • the top end(2) (distal part ie. away from the users hand) of the barrel is the narrowest part which is intended to support the needle mount and make a tight joint with the needle mount.
  • the barrel to supports the end of the needle mount partly due to physical measurements and partly by adhesion between the two surfaces snuggly to make a water tight seal.
  • the barrel could be further modified to stop the needle mount from deforming during the normal pressure exerted during syringe use.
  • the barrel may also have a means which is either a radial projection or preferably a slight constriction on wall of the barrel - to stop premature engagement of the retracting mechanism at the needle end of the barrel
  • the constrictions (No 3) on the wall of this part of the barrel are designed to prevent any movement of the needle mount during insertion of the needle into the vial for the withdrawal of the solution and injection of the solution in the skin.
  • the shoulder of the barrel (No 4) is the part which helps to keep the needle mount(15) in place and prevents it from sliding out of the barrel during whole operation.
  • the needle mount (15) is made of a flexible material such as from latex, PVC, and thermoplastic elastomer, urethane rubber, and preferably .thermoplastic elastomer intended to provide a water tight seal against the barrel wall during the withdrawal and administration of the injectable.
  • the shape is as shown-cylindrical and has a central cavity (Nol6) and a ring like base at the lower end of the part -intended to engage the tip of the plunger during retraction of needle into the barrel at the end of the intended use of the syringe.
  • the upper end of the needle mount has a near cylindrical projection (No 17) where the needle (No 18) is glued into.
  • the needle mount is fitted with a needle during the manufacturing process in a way wherein the bore of the needle opens to the hollow cylindrical base.
  • This fitting is preferentially carried out by gluing and can alternatively be performed by any other comparable method.
  • a hollow canal running through the centre of the needle mount can be created to facilitate insertion of the needle.
  • the remainder of the barrel is essentially cylindrical (No 5).
  • the flaps at the end of the barrel (No 6) which are intended for use as fingers support have foldable flaps (No 7) which are flappable and are clipped together during the assembly process into push rod retainers (No 8). They serve the purpose of preventing the withdrawal of the retracted plunger with the needle mount with the needle from exiting the barrel, and the openings in the folding flanges( in cross shape) ensure the movement of the plunger within the barrel- unidirectional.
  • the plunger (No 9) preferably also made of propylene has a substantially cylindrical head with truncated tip (NolO)
  • the inverted cone shaped projection of the plunger at the tip is designed to engage the needle mount irreversibly and is intended to effect retraction of the needle into the barrel by overcoming the adhesion and mechanical forces which attach the needle mount to the barrel.
  • the plunger further extends into a circular disc (No 11) which is intended to provide a tight seal with the barrel during the intended use of the syringe. Below the disc, the plunger continues as a cross shaped in section (No 12) having a narrow section which is breaking point (No 13). The plunger continues downwards and ends into a circular head (No 14) which is the thumb rest when the syringe is used.
  • the cone shaped tip of the plunger gets engaged with the base of the needle mount thereby rendering the syringe unusable (because of the hollow structure, shape and the most important feature- the flexible material used in making the needle mount ) and the needle mount along with the needle is retracted into the barrel.
  • the plunger is broken ,if desired ,at the narrow point ,to prevent any further chance of reusing the syringe.
  • the syringe of the present invention can protect both the medical staff and the patients- by avoiding cross contamination and preventing the used needle from pricking and scratching and causing needle stick injuries.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (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

La présente invention porte sur une seringue rétractable simple comprenant un corps ayant un support d'aiguille, comportant une aiguille montée à l'intérieur de l'extrémité distale du corps à coulissement de manière étanche. Le support d'aiguille est constitué d'un matériau souple et déformable ayant une structure de base cylindrique creuse. Un piston ayant une pointe en forme de cône inversé est disposé de manière coulissante à l'intérieur du corps de seringue. La pointe en forme de cône du piston peut venir en prise de manière étroite avec la structure de base cylindrique creuse du support d'aiguille lors d'un contact avec une légère pression pour désactiver la seringue et permettre la rétraction dans le corps du support d'aiguille avec l'aiguille fixée après l'achèvement du processus d'injection.
PCT/IN2011/000230 2010-07-06 2011-04-01 Seringue rétractable WO2012004804A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN1940MU2010 2010-07-06
IN1940/MUM/2010 2010-07-06

Publications (1)

Publication Number Publication Date
WO2012004804A1 true WO2012004804A1 (fr) 2012-01-12

Family

ID=45440826

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2011/000230 WO2012004804A1 (fr) 2010-07-06 2011-04-01 Seringue rétractable

Country Status (1)

Country Link
WO (1) WO2012004804A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019204858A1 (fr) * 2018-04-26 2019-10-31 Largos Services Pty Ltd Seringue de sécurité pré-remplissable

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1250942A1 (fr) * 2001-04-17 2002-10-23 Syringe Lab. Co., Ltd. Seringue de sécurité jetable
US20070100291A1 (en) * 2005-10-31 2007-05-03 Chin-Hsia Huang Safety syringe
WO2007129822A1 (fr) * 2006-05-10 2007-11-15 Keun-Shik Kim Injecteur de sécurité automatique à usage unique
WO2008064389A1 (fr) * 2006-11-28 2008-06-05 Morgan Meditech Inc Seringue rétractable
US20080154194A1 (en) * 2006-12-21 2008-06-26 Hung-Chi Huang Safety syringe device with retractable needle cannula

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1250942A1 (fr) * 2001-04-17 2002-10-23 Syringe Lab. Co., Ltd. Seringue de sécurité jetable
US20070100291A1 (en) * 2005-10-31 2007-05-03 Chin-Hsia Huang Safety syringe
WO2007129822A1 (fr) * 2006-05-10 2007-11-15 Keun-Shik Kim Injecteur de sécurité automatique à usage unique
WO2008064389A1 (fr) * 2006-11-28 2008-06-05 Morgan Meditech Inc Seringue rétractable
US20080154194A1 (en) * 2006-12-21 2008-06-26 Hung-Chi Huang Safety syringe device with retractable needle cannula

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019204858A1 (fr) * 2018-04-26 2019-10-31 Largos Services Pty Ltd Seringue de sécurité pré-remplissable

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