WO2010121289A1 - Seringue à gaine de sécurité - Google Patents

Seringue à gaine de sécurité Download PDF

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Publication number
WO2010121289A1
WO2010121289A1 PCT/AU2010/000299 AU2010000299W WO2010121289A1 WO 2010121289 A1 WO2010121289 A1 WO 2010121289A1 AU 2010000299 W AU2010000299 W AU 2010000299W WO 2010121289 A1 WO2010121289 A1 WO 2010121289A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheath
syringe
storage chamber
substance storage
syringe according
Prior art date
Application number
PCT/AU2010/000299
Other languages
English (en)
Inventor
Colin Campbell Marshall Moore
Original Assignee
Collyn Patent Holdings Pty 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
Priority claimed from AU2009901674A external-priority patent/AU2009901674A0/en
Application filed by Collyn Patent Holdings Pty Ltd filed Critical Collyn Patent Holdings Pty Ltd
Priority to AU2010239126A priority Critical patent/AU2010239126B2/en
Priority to SG2011076676A priority patent/SG175750A1/en
Priority to NZ595880A priority patent/NZ595880A/xx
Publication of WO2010121289A1 publication Critical patent/WO2010121289A1/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
    • A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3271—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel with guiding tracks for controlled sliding of needle protective sleeve from needle exposing to needle covering position
    • A61M5/3272—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel with guiding tracks for controlled sliding of needle protective sleeve from needle exposing to needle covering position having projections following labyrinth paths
    • 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
    • A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3257—Semi-automatic sleeve extension, i.e. in which triggering of the sleeve extension requires a deliberate action by the user, e.g. manual release of spring-biased extension 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
    • A61M5/178—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
    • A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/326—Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user
    • A61M2005/3267—Biased sleeves where the needle is uncovered by insertion of the needle into a patient's body

Definitions

  • the present invention relates to a syringe having a sheath.
  • Embodiments of the present invention find application, though not exclusively, in the medical industry for use in administering drugs and other substances to patients.
  • the risk of needle stick injury is a potential issue associated with the use of syringes for drug delivery. This risk is of particular concern due to the possibility that the syringe needle may be contaminated with infectious material after use.
  • One means provided in the prior art for minimizing this risk is the provision of a sheath which is slidable from an retracted position in which the syringe needle is exposed to an extended position in which the syringe needle is housed within the sheath such that the user is substantially protected from inadvertent contact with the needle tip. Examples of such prior art are disclosed in United States Patent Nos.
  • Another potential issue that may be associated with the use of syringes is a fear response experienced by some patients upon catching sight of the sharp needle.
  • the use of a sheath as disclosed in the prior art mentioned in the preceding paragraph may assist in this regard by obscuring the patient's view of the needle.
  • a syringe including: at least one substance storage chamber; a hypodermic needle in fluid communication with the substance storage chamber, the hypodermic needle defining a needle tip; a sheath slidably disposed for displacement between a retracted position in which at least the needle tip is exposed and an extended position in which the needle tip is shrouded; and biasing means adapted to bias the sheath toward the extended position.
  • the biasing means is resilient and it may be in the form of a spring.
  • the substance storage chamber defines a proximal end having an aperture for receipt of a plunger and a flange is disposed at or adjacent to the proximal end of the substance storage chamber.
  • the biasing means typically extends between the flange and the sheath. A distal end of the biasing means may abut a proximal end of the sheath.
  • the biasing means is a coil spring and at least part of the substance storage chamber is disposed internally of the coil spring.
  • the coil spring, substance storage chamber and sheath are all substantially cylindrical.
  • a guide slot is defined in one of the substance storage chamber or the sheath and a follower element adapted for displacement along the slot is provided upon the other of the substance storage chamber or the sheath.
  • the guide slot defines a first position for locking of the sheath in the retracted position and the guide slot defines a second position for locking of the sheath in the extended position.
  • the guide slot may have an open end adapted for passage of the follower element into and out of the slot such that the sheath is selectively attachable and detachable from the substance storage chamber.
  • the needle is disposed on a needle assembly which is selectively detachable from the substance storage chamber to allow for attachment of a connector to the substance storage chamber.
  • the connector may be any one of: a catheter; an intravenous feeding tube; a Luer lock or a Luer slip, for example.
  • the syringe is a single-use syringe.
  • An embodiment of the syringe further includes an automatically operable locking means adapted to lock the sheath in the extended position.
  • the automatically operable locking means may include an arcuate portion of the guide slot leading to the second position, such that extension of the sheath displaces the follower element along the arcuate portion and into the second position.
  • the slot defines a recess adjacent the second position such that the recess contacts and halts the follower element in response to retraction forces applied to the sheath whilst locked in the extended position.
  • a method of using a syringe including the steps of: providing a syringe as described above; positioning a distal end of the sheath on a patient whilst allowing the biasing means to retain the sheath in the extended position; displacing the syringe toward the patient so as to simultaneously retract the sheath and insert the needle into the patient.
  • the method further includes the step of displacing the syringe away from the patient so as to simultaneously withdraw the needle from the patient and allow the biasing means to displace the sheath toward the extended position, thereby retaining the distal end of the sheath. in contact with the patient until the sheath reaches the extended position.
  • the method may further include the step of locking the sheath in the extended position.
  • Figures IA and IB are side partially cross sectional views of a first embodiment of the invention, with the sheath depicted in the extended position on Fig. IA and the sheath depicted in the retracted position on Fig. IB;
  • Figure 2 is an enlarged cross sectional view of the substance storage chamber and a part of the sheath of the first embodiment;
  • Figure 3 is a perspective view of the first embodiment;
  • Figures 4 A and 4B are side partially cross sectional views of a second embodiment of the invention, with the sheath depicted in the extended position on Fig. 4A and the sheath depicted in the retracted position on Fig. 4B;
  • Figures 5 A and 5B are side views of a third embodiment of the invention, with the sheath depicted in the extended position on Fig. 5A and the sheath depicted in the retracted position on Fig. 5B;
  • Figure 6 is a perspective view of the third embodiment.
  • Figure 7 is a side view of a fourth embodiment of the invention.
  • the syringe 31 has a substance storage chamber 10 in the form of a substantially cylindrical barrel portion.
  • the substance storage chamber 10 defines a proximal end 24 having an aperture for receipt of a plunger 36.
  • a flange 38 is disposed at or adjacent to the proximal end 24 of the substance storage chamber 10.
  • a hypodermic needle 18, defining a needle tip 19, is in fluid communication with the substance storage chamber 10, such that movement of the plunger 36 can selectively force fluid through the needle 18, either into, or out of, the substance storage chamber 10.
  • the outer surface of the substance storage chamber 10 is provided with a guide slot 12 for a retractable safety sheath 14.
  • the guide slot 12 comprises a linear guide section 16 extending at least sufficiently along the length of the barrel portion 10 for the safety sheath 14 to slide between a fully retracted position, and an extended position.
  • the sheath 14 is a substantially cylindrical hollow member that is arranged so as to prevent inadvertent needle-stick injuries.
  • the thickness of the sidewall of the sheath 14 is preferably approximately 0.5mm to lmm, although in some embodiments the thickness may fall outside this range.
  • the safety sheath 14 In the extended position the safety sheath 14 extends beyond the needle tip 19 of the needle 18 so as to shroud the needle tip 19 and thereby render the needle tip 19 generally incapable of contact with the skin of a patient or user.
  • the extended position is shown on the syringe depicted in Fig. IA.
  • the needle tip 19 is exposed, as may be seen on the syringe depicted in Fig. IB.
  • Resilient biasing means in the form of a substantially cylindrical coil spring 33, is adapted to bias the sheath 14 toward the extended position. As best shown in figure 2, the coil spring 33 extends such that the proximal end of the coil spring 33 abuts the flange 38 and the distal end of the coil spring 33 abuts the proximal end of the sheath 14. Part of the substance storage chamber 10 is disposed internally of the coil spring 33.
  • the coil spring 33 resiliently urges the sheath 14 toward the extended position, thus relieving the user of the responsibility to do so manually. Due to the biasing, an effort is required to retract the sheath 14 against the force exerted by the spring 33. Hence, unless locked in the retracted position (as described in more detail below) the natural resting position of the sheath is in the extended position. This promotes improved safety as in normal use the sheath 14 is more likely to be positioned in the extended position.
  • the guide slot 12 is provided with a retracted locking segment 20 and an extended locking segment 22. Both segments are a continuation of the guide slot 16 but are disposed transverse to it so as to extend a short distance around the circumference of the barrel portion 10, with the retracted locking segment 20 close to the proximal end 24 of barrel portion 10.
  • sheath 14 is provided with a generally cylindrical follower element 26 that is adapted for displacement along the guide slot 12.
  • the cylindrical follower element protrudes radially from the inside surface of the sheath 14 and is dimensioned to'slide in the linear guide section 16 and locking segments 20 and 22 of the barrel portion 10.
  • the follower element 26 is disposed near the proximal end 30 of the sheath 14 and is arranged so that when the sheath is fully retracted, the sheath may be rotated relative to the barrel 10 so that the follower element 26 enters locking segment 20, thereby retaining the sheath 14 in the retracted position despite the biasing force exerted by the coil spring 33.
  • the retracted locking segment 20 defines a first position in the guide slot 12 for disposition of the follower element 26 so as to lock of the sheath 14 in the retracted position.
  • the extended locking segment 22 defines a second position in the guide slot 12 for disposition of the follower element 26 so as to lock the sheath 14 in the extended position.
  • the user of the syringe 31 may choose to lock the sheath 14 into the retracted position immediately prior to charging a substance, such as a drug for example, into the substance storage chamber 10 and/or immediately prior to injecting the hypodermic needle into a patient.
  • a substance such as a drug for example
  • the invention also encompasses alternative methodologies for injecting the needle 18 into a patient which do not require the user to manually retract the sheath 14.
  • the sheath 14 when fully extended, the sheath 14 may be rotated to enter the follower element 26 into the extended locking segment 22, thereby locking the sheath in the extended position.
  • the follower element 26 When the follower element 26 is so engaged in the locking segment 22, the sheath 14 is prevented from axial movement relative to the barrel portion 10.
  • the protruding follower element 26 and guide and locking segments 20 and 22 of the channel 12 are so sized that, particularly when in the locked extended position, the sheath 14 resists accidental dislodgement by the typical accidental end impacts encountered when manipulating a syringe in use.
  • the facility to lock the sheath 14 in the extended position provides further resistance to retraction of the sheath in addition to that provided by the biasing force applied to the sheath by the coil spring 33.
  • the distal end 32 of the sheath 14 is extended and tapered, narrowing towards its distal end, so that when extended in the safety position, it resists accident insertion of a finger into the sheath opening.
  • the guide slot 12 is defined on the internal surface of the sheath 14 and the follower element 26 is provided upon the outer surface of the substance storage chamber 10. Additionally, the guide slot 12 has an open end 40 adapted for passage of the follower element 26 into and out of the slot 12. This allows the sheath 14 to be selectively attachable and detachable from the substance storage chamber 10. Additionally, the needle 18 is disposed on a needle assembly 42, which is selectively detachable from the substance storage chamber 10. Hence, the sheath 14 may be attached to the syringe if required to protect against hypodermic needle injuries.
  • the sheath 14 may be detached. This allows for detachment of the needle assembly 42, which in turn allows for attachment of another type " of connector to the substance storage chamber 10.
  • a non-limiting list of examples of such other types of connectors includes catheters, intravenous feeding tubes, Luer locks and Luer slips. It will be appreciated that this facility to utilise other types of connectors advantageously enhances the usage flexibility offered by some embodiments of the syringe.
  • the syringe 31 is a single use syringe. This may be achieved with the use of a one way valve, or other similar arrangement. Examples of some single use syringes are provided by International Patent Application No. PCT/AU2005/001939 (Publication No. WO 2006/066336, dated 26 June 2006), the contents of which are hereby incorporated in their entirely by way of reference.
  • an embodiment of the invention has an automatically operable locking means 44 adapted to automatically lock the sheath in the extended position.
  • the automatically operable locking means 44 includes an arcuate portion 46 disposed at the proximal end of the guide slot 12, which leads to second position 48.
  • the automatically operable locking means 44 functions in the following manner. If the sheath 14 is initially retracted and is ready to be extended by the biasing force exerted by the coil spring 33, then follower element 26 is initially positioned at the distal end of the linear guide section 16. Displacement of the sheath 14 towards the extended position caused by the biasing force causes relative movement between the guide slot 12 and the follower element 26 such that the follower element 26 draws closer to the proximal end of the guide slot 12.
  • the second position 48 is defined at the proximal end of the guide slot 12 and includes a first recess 50 on the proximal side of the guide slot 12 and a second recess 52 on the distal side of the guide slot 12.
  • the biasing force exerted by the coil spring 33 forces the follower element into the first recess 50.
  • This detent must be overcome by a user to displace the follower element out of the first recess and into the arcuate portion 46 so as to allow for retraction of the sheath 14.
  • an inadvertent retractive force such as an accidental bumping of the end of the sheath, which is significant enough to overcome the biasing force of the coil spring 33, will tend to displace the sheath 14 toward the substance storage chamber 10.
  • this inadvertent retraction of the sheath 14 is unlikely to guide the follower element 26 into the arcuate portion 46 to allow for full retraction of the sheath because the arcuate portion 46 of the slot 12 extends away from the second position 48 in a direction that is roughly at right angles to the direction of retraction of the sheath 14.
  • One methodology for using an embodiment of the syringe 31 commences with the step of positioning a distal end of the sheath 14 at an appropriate site on a patient whilst allowing the biasing means to retain the sheath in the extended position. Hence the needle 18 is visually obscured from the patient both whilst the syringe 31 is being brought into the patient's proximity and whilst the syringe is being held against the patient's skin.
  • the next step in this methodology involves inserting the hypodermic needle 18 into the patient. To achieve this, the user displaces the syringe 31 toward the patient whilst allowing the patient's skin to remain in contact with the distal end of the sheath 14.
  • the needle 18 remains obscured from the patient's sight. This may help nervous patients to avoid additional stress associated with the sight of a sharp needle. Additionally, throughout this process the only point at which the sheath 14 is retracted sufficiently for the needle tip 19 to clear the end of the sheath is whilst the end of the sheath is being held against the patient's skin. Hence, there is little or no risk that anyone other than the intended patient will come into contact with the needle tip 19 when properly executing this methodology.

Abstract

L'invention concerne une seringue (31) comprenant une chambre de stockage de substance (10) et une aiguille hypodermique (18) définissant une pointe (19), qui est en communication fluidique avec la chambre de stockage de substance (10). La surface extérieure de la chambre de stockage de substance (10) est pourvue d'une fente de guidage (12) destinée à une gaine de sécurité rétractable (14) qui peut coulisser entre une position complètement rétractée et une position étendue. Des moyens de sollicitation élastiques, sous forme de ressort hélicoïdal (33) sensiblement cylindrique, sont conçus pour solliciter la gaine (14) vers la position étendue, ce qui libère l'utilisateur de la responsabilité de le faire manuellement. Etant donné qu'en utilisation normale la gaine (14) risque davantage d'être placée en position étendue, l'invention permet d'améliorer la sécurité, ce qui permet de minimiser ou d'empêcher les blessures accidentelles par aiguille.
PCT/AU2010/000299 2009-04-20 2010-03-16 Seringue à gaine de sécurité WO2010121289A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2010239126A AU2010239126B2 (en) 2009-04-20 2010-03-16 Syringe with safety sheath
SG2011076676A SG175750A1 (en) 2009-04-20 2010-03-16 Syringe with safety sheath
NZ595880A NZ595880A (en) 2009-04-20 2010-03-16 Syringe with a spring biased safety sheath to cover a hypodermic needle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2009901674 2009-04-20
AU2009901674A AU2009901674A0 (en) 2009-04-20 Syringe with Safety Sheath

Publications (1)

Publication Number Publication Date
WO2010121289A1 true WO2010121289A1 (fr) 2010-10-28

Family

ID=43010575

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2010/000299 WO2010121289A1 (fr) 2009-04-20 2010-03-16 Seringue à gaine de sécurité

Country Status (4)

Country Link
AU (1) AU2010239126B2 (fr)
NZ (1) NZ595880A (fr)
SG (1) SG175750A1 (fr)
WO (1) WO2010121289A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013037744A1 (fr) 2011-09-13 2013-03-21 Sanofi-Aventis Deutschland Gmbh Dispositif d'injection
US20140221909A1 (en) * 2013-01-14 2014-08-07 R. Ashley Burrow Surgical Aspiration and Irrigation
EP2808045A1 (fr) * 2013-05-27 2014-12-03 Heußler, Tilmann Embout d'une seringue
EP2835145A1 (fr) * 2013-08-05 2015-02-11 Mohamed Salim Dean Seringue hypodermique de sécurité
WO2015075430A1 (fr) * 2013-11-22 2015-05-28 Salar Surgical Ltd Système et procédé d'injection
EP3043847A4 (fr) * 2013-09-11 2017-08-23 Parenteral Technologies, LLC Manchon pour seringue à graduations et mécanisme de retrait d'aiguille
CN110420379A (zh) * 2019-08-29 2019-11-08 赵俊文 一种组合式妇科给药器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4695274A (en) * 1986-01-31 1987-09-22 Fox Richard L Protected hypodermic needle
US5591138A (en) * 1995-08-10 1997-01-07 Vaillancourt; Vincent L. Protected needle assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4695274A (en) * 1986-01-31 1987-09-22 Fox Richard L Protected hypodermic needle
US5591138A (en) * 1995-08-10 1997-01-07 Vaillancourt; Vincent L. Protected needle assembly

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9339609B2 (en) 2011-09-13 2016-05-17 Sanofi-Aventis Deutschland Gmbh Injection device
WO2013037744A1 (fr) 2011-09-13 2013-03-21 Sanofi-Aventis Deutschland Gmbh Dispositif d'injection
JP2014528786A (ja) * 2011-09-13 2014-10-30 サノフィ−アベンティス・ドイチュラント・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング 注射デバイス
US9480782B2 (en) * 2013-01-14 2016-11-01 R. Ashley Burrow Surgical aspiration and irrigation
US20140221909A1 (en) * 2013-01-14 2014-08-07 R. Ashley Burrow Surgical Aspiration and Irrigation
EP2808045A1 (fr) * 2013-05-27 2014-12-03 Heußler, Tilmann Embout d'une seringue
EP2835145A1 (fr) * 2013-08-05 2015-02-11 Mohamed Salim Dean Seringue hypodermique de sécurité
EP3043847A4 (fr) * 2013-09-11 2017-08-23 Parenteral Technologies, LLC Manchon pour seringue à graduations et mécanisme de retrait d'aiguille
WO2015075430A1 (fr) * 2013-11-22 2015-05-28 Salar Surgical Ltd Système et procédé d'injection
US20160287437A1 (en) * 2013-11-22 2016-10-06 Salar Surgical Ltd Injection system and method
CN106029017A (zh) * 2013-11-22 2016-10-12 萨拉尔医疗有限公司 注射系统及方法
US10646371B2 (en) 2013-11-22 2020-05-12 Salar Surgical Ltd Injection system and method
CN110420379A (zh) * 2019-08-29 2019-11-08 赵俊文 一种组合式妇科给药器
CN110420379B (zh) * 2019-08-29 2024-01-05 珠海亿立达电子设备有限公司 一种组合式妇科给药器

Also Published As

Publication number Publication date
AU2010239126B2 (en) 2012-09-06
AU2010239126A1 (en) 2011-11-10
NZ595880A (en) 2013-05-31
SG175750A1 (en) 2011-12-29

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