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
  • A61M5/326—Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user
• • 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
  • A61M5/3245—Constructional features thereof, e.g. to improve manipulation or functioning
  • A61M2005/3247—Means to impede repositioning of protection sleeve from needle covering to needle uncovering position
• • 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
  • A61M2005/3261—Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user triggered by radial deflection of the anchoring parts between sleeve and syringe barrel, e.g. spreading of sleeve retaining hooks having slanted surfaces by engagement with conically shaped collet of the piston rod during the last portion of the injection stroke of the plunger
• • 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

Definitions

• the present invention refers to a glass syringe, of the disposable type, provided with an automatic safety device to protect the needle once the injection has been performed.
• the present invention also refers to a relative safety kit that can be applied to a disposable glass syringe.
• a syringe generally comprises a cylindrical body open at the rear to receive a plunger.
• An internally hollow needle is mounted at the head of the syringe body.
• syringes generally present drawbacks from the point of view of safety. In fact, once the syringe has been used, the needle remains exposed at the head of the syringe body, with the risk of injuries or accidental needle sticks.
• plastic disposable syringes having safety devices to cover the needle are available on the market.
• Patent application PCT WO 99/37345 describes a disposable safety syringe which has a needle covering sleeve mounted axially on the syringe body and slidable from a retracted position in which it leaves the needle exposed to allow injection, to an extended position in which it completely covers the needle, preventing re-use of the syringe and acting as a protection against accidental needle sticks.
• the sleeve is automatically brought into the extracted safety position, by means of an automatic mechanism and without any intervention by the user.
• Glass syringes are generally designed to be able to be reused. In fact, the glass syringe body can be sterilized at high temperature. For this reason, glass syringes generally do not provide any safety device for protection of the needle once the injection has been performed.
• prefilled syringes in which the solution is already inside the barrel of the syringe, ready for injection, are widely available on the market.
• solutions such as vaccines, antidotes and the like which cannot be stored in plastic containers. Consequently, said solutions must necessarily be placed in prefilled glass syringes.
• An object of the present invention is to eliminate the prior art drawbacks, providing a glass safety syringe that is practical, versatile, economical and simple to make.
• Another object of the present invention is to provide such a glass safety syringe of the disposable type that is able to prevent further attempts at use.
• Another object of the present invention is to provide such a glass syringe that is extremely safe and able to prevent accidental injury and tampering after use.
• the syringe according to the invention comprises a glass syringe body hollow on the inside and open at the front and the rear, a plunger slidable inside the syringe body and provided at the rear with a manually operable stem and an injection needle mounted at the fore end of the syringe body.
• Locking means and stops are provided reciprocally in the sheath and sleeve such as to lock sleeve in position when it is in the retracted use position and in the advanced safety position.
• Operating means able to cooperate with the locking means when the plunger is at the end of the injection stroke are fitted to the rear part of the piston stem, to allow the sleeve to be moved from the retracted use position to the advanced safety position.
• the advantages of the syringe according to the invention are obvious in that it allows a glass syringe to be made into a safety syringe, by providing the possibility of covering the needle with the sleeve once the injection has been performed.
• Figure 1 is a top plan view of the safety syringe according to the invention, in the position ready for use, with a needle-covering cap mounted at the head of the syringe body;
• Figure 2 is an axial sectional view of the safety syringe of Figure 1, in which the syringe body and the piston stem are shown in side view;
• Figure 3 is an axial sectional view taken along the sectional plane HI-r ⁇ of Figure 1, in which the piston stem is shown in side view and in the end of injection position and the needle-covering cap has been removed;
• Figure 4 is an axial sectional view, like Figure 3, in which the needle is in the safety position;
• Figure 5 is a perspective view, illustrating a sheath for covering a syringe body.
• the safety syringe according to the invention denoted as a whole by reference numeral 100, is described with the aid of the figures.
• the syringe 100 comprises a syringe body 1 (shown in Figures 2 and 4) made of glass.
• the syringe body 1 is substantially cylindrical in shape, is hollow on the inside and has a cylindrical chamber open at the front and rear.
• the body 1 has at its fore end a head 10 into which a needle 11 is sunk.
• the body 1 has at its rear end a flange 12 that protrudes radially therefrom to facilitate gripping by the user.
• a plunger 2 made of rubber can slide axially with a tight seal in the cylindrical chamber of the syringe body 1.
• the plunger 2 is supported at the fore end by a stem 20 made of glass or plastic.
• the stem 20 has at its rear end a flange 21 disposed on the outside of the syringe body 1 to be able to be operated manually by the user.
• a frusto conical block 22 disposed around the stem 20, near the flange 21 of the stem, is provided.
• the frusto conical block 22 has a tapered side surface with a diameter that increases toward the rear part of the stem 20.
• the frusto conical block 22 can be formed integrally in the rear part of the stem, or it can be a separate element to apply to the stem 20. In this latter case, the frusto conical block 22 has an axial hole 24 to be forcibly inserted, from the front part of the stem, until it abuts against the rear flange 21 of the stem. In this case, the frusto conical block 22 has an annular groove 23 to be able to yield elastically.
• a tubular sheath 3 that almost entirely covers the side surface of the syringe body 1 is mounted on the syringe body 1.
• the sheath 3 comprises at its fore end a collar 30 which protrudes radially outward so as to define an annular abutment surface 35.
• each longitudinal slot 32 defines a rear abutment surface 33 and a front abutment surface 34.
• the sheath 3 is made of plastic material and is elastically forced and fixed on the glass body 1.
• the syringe body 1, with the sheath 3 integral therewith, is mounted axially slidably inside a substantially cylindrical sleeve 4, hollow on the inside. In this manner, the head 10 of the syringe body 1 protrudes forwardly and axially from the sleeve 4 and a needle-covering cap 8 is fitted to the head 10.
• the sleeve 4 has a cylindrical rear part 40 with a greater diameter and a cylindrical front part 41 with a smaller diameter, so as to define on the inside an annular abutment surface
• two rear tongues 43 are formed in the side wall of the part
• the rear tongues 43 are disposed longitudinally in diametrically opposite positions and are flexible. Each rear tongue 43 has a rectangular slot 44 within which the respective tooth 31 of the collar 30 of the sheath snap engages, so as to firmly retain the sheath 3 inside the sleeve 4.
• Each rear tongue 43 is defined by two longitudinal parallel notches 45 which reach the end of the part with the greatest diameter 40. In this manner, each rear tongue 43 can bend radially outward. Furthermore, each rear tongue 43 has a rear part which protrudes rearward beyond the rear end of the part with the largest diameter, 40. The rear end of each tongue 43 has a tapered surface 46 able to cooperate with the tapered surface of the frusto conical block 22 of the stem.
• a flange 55 protrudes radially to facilitate gripping by the user.
• the rear flange 55 of the sleeve is not present in the area in which there are the rear tongues 43 so as not to interfere therewith.
• the flange 55 of the sleeve has in its rear wall an annular abutment surface against which the rear flange 12 of the glass body 1 abuts.
• central tongues 47 are formed in the lateral part of the part with the smallest diameter 41 of the sleeve.
• the central tongues 47 are disposed longitudinally in diametrically opposite positions and are flexible.
• Each central tongue 47 is defined by a substantially U-shaped notch 48, so as to be able to bend radially outward.
• Each central tongue 47 has an inwardly protruding tooth 49 able to engage in the respective longitudinal slot 32 of the sheath 3. i this manner, when the syringe body 1 with the sheath 3 are inserted inside the sleeve 4, the central tongues 47 are widened and then elastically snap back when the teeth 49 engage in the respective slots 32 in the sheath.
• Two front tongues 50 are formed in the side wall of the sleeve part 41 with the smallest diameter.
• the front tongues 50 are longitudinally disposed in diametrically opposite positions.
• Each front tongue 50 is defined by a substantially U-shaped notch 51, so as to be able to bend radially outward. Under normal conditions, each front tongue 50 converges inwardly and has at its front end an abutment surface 52.
• the chamber of the body 1 is pre-filled with a solution to be injected.
• the needle 11 is protected in the safety position inside the sleeve 4.
• the syringe 100 when the syringe 100 is in the safety position, any axial movement of the sleeve 4 with respect to the sheath and syringe body assembly is prevented.
• the front end of the sheath 3 abuts against the rear end 52 of the front tongues 50 which are convergent and the rear abutment surfaces 34 of the slots 32 in the sheath are in abutment against the respective teeth 49 of the central tongues 47 of the sleeve.
• the present invention besides referring to the safety syringe 100 as described, also refers to a safety kit comprising the sheath 3, the spring 6, the sleeve 4 and the frusto conical block 22, considered as separate pieces which are applied to a glass syringe of the known type to make it a safety syringe.

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)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

Family

ID=27589215

Family Applications (1)

Country Status (11)

Cited By (11)

Families Citing this family (30)

Citations (5)

Family Cites Families (3)

• 2002
  • 2002-02-11 EP EP02425069A patent/EP1334740A1/en not_active Withdrawn
• 2003
  • 2003-02-10 AU AU2003210230A patent/AU2003210230A1/en not_active Abandoned
  • 2003-02-10 JP JP2003567477A patent/JP2005516740A/ja active Pending
  • 2003-02-10 AT AT03739461T patent/ATE409504T1/de not_active IP Right Cessation
  • 2003-02-10 WO PCT/EP2003/001271 patent/WO2003068297A1/en not_active Ceased
  • 2003-02-10 CN CN03803652.5A patent/CN1630541A/zh active Pending
  • 2003-02-10 US US10/503,974 patent/US20050096595A1/en not_active Abandoned
  • 2003-02-10 ES ES03739461T patent/ES2315508T3/es not_active Expired - Lifetime
  • 2003-02-10 DE DE60323815T patent/DE60323815D1/de not_active Expired - Fee Related
  • 2003-02-10 EP EP03739461A patent/EP1480699B1/en not_active Expired - Lifetime
  • 2003-02-10 RU RU2004127228/14A patent/RU2311203C2/ru not_active IP Right Cessation
  • 2003-02-10 BR BR0303090-3A patent/BR0303090A/pt not_active IP Right Cessation

Patent Citations (5)

Also Published As

Similar Documents

Legal Events