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Safety syringe

A syringe and pre-injection technology, used in syringes, hypodermic devices, infusion sets, etc., can solve problems such as inaccurate filling of doses, ineffective shield locking in the extended position, errors, etc.

Inactive Publication Date: 2008-11-26
COLLYN PATENT HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Another concern during drug delivery, especially with the aid of syringes, is that unauthorized persons may use the drug as well as the syringe
[0004] Another problem concerns that even practitioners in the field may inaccurately fill syringes with doses
Errors can also occur where the exact dose is filled into the syringe but the full dose is not delivered
This can happen, for example, if the syringe is overprimed before it is used, resulting in insufficient drug remaining in the syringe for actual delivery
[0005] Furthermore, the problem with at least some forms of substances intended to be delivered, for example, into humans or animals is that the substance has a limited shelf life once it has been prepared for use
Therefore, if the shield is accidentally pushed with a force similar to that required to operate the shield, this structure will not effectively lock the shield in the extended position and will not prevent the needle from contacting and puncturing the skin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0087] FIG. 1 is a schematic illustration of a disposable syringe assembly 10 . In this example, syringe assembly 10 includes a single self-contained cylindrical storage device in the form of a cylindrical container 11 having a storage space 12 defined therein. The precise volume of the storage space 12 is determined by a seal 13 which can move in a sealed, sliding manner along the longitudinal axis 14 of the container 11 and which always remains sealed against the inner wall 15 of the container 11 during the movement touch. The first end 16 of the container 11 is adapted to slidingly receive an elongated plunger 17 therein. The plunger 17 is adapted to be aligned along its longitudinal axis with the axis 14 of the container 11 and to be advanced into the first end 16 of the container 11 so that a seal adapter 18 at the front end of the plunger is detachably mounted at the In the plunger joint seat 19 in the back side 20 of the movable seal 13 . The plunger adapter seat 19 ...

no. 2 example

[0100] Referring to Fig. 4, there is shown a drug delivery system 100 based on the first embodiment of the syringe described above. The system 100 is adapted to deliver a predetermined amount of medication from a first location 102 to a second location 103 .

[0101] At a first location 102, the drug is dosed into discrete quantities suitable for delivery as a single dose, for example by means of injection into a mammal. This predetermined amount of drug is then filled into a self-contained storage device in the form of a cartridge container 104 . The cylindrical container has an actuator engagement means in the form of a movable seal 105 at its first end and a delivery means engagement means in the form of a sealed, rupturable outlet 106 at a second end of the cylindrical container.

[0102] When it is desired to deliver a predetermined amount of medicament or other substance 107, for example, to a patient 108 by means of injection at a second site 103, the container 104 is ...

no. 3 example

[0107] Referring to Figure 6, there is shown a multi-compartment syringe 210, and with particular reference to Stage 1 shown on the left side of the figure, the multi-compartment syringe is shown in a pre-use or storage position and comprises at least: a first self-contained round a cartridge storage device comprising a first compartment 211 having a first substance 212 hermetically stored inside; and a second self-contained cylindrical storage device comprising a second compartment having a second substance 214 hermetically stored inside 213. The first compartment 211 is basically formed by the barrel of the above-mentioned syringe housing, sealed at the outlet portion 216 by a rupturable barrier 217, and is further defined and sealed at the second end by a sliding seal 218, so as to be closed between the outlet portion and the second end. A predetermined space for accommodating a predetermined amount of the first substance 212 is provided between the two ends. Also as descr...

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Abstract

There is provided a syringe assembly comprising a first, self contained cylindrical storage means (211) containing a first substance (212) and a second, self contained, cylindrical storage means (213) containing a second substance (214). The second storage means is slidably received by the first storage means and is adapted to pierce a slidable sealing element of the first storage means for mixing of the first and second substances in the first storage means. Axially driving the sealing element of the first storage means effects ejection of the resulting mixed substance from the syringe for delivery to a patient. There is also disclosed a syringe assembly with a safety sheath for covering a needle of the syringe when in an extended position and which is slidable from the extended positionto a retracted position to expose the needle for use.

Description

technical field [0001] The present invention relates to drug delivery systems and devices thereof. More particularly, the present invention also relates to disposable syringes for delivering predetermined doses of medicaments, and syringes that, at least in some embodiments, reduce the risk of needle stick injuries before and after use. Background technique [0002] There is a perceived need for a syringe adapted to deliver medicament in such a way that after assembly, the syringe can only be used once to deliver medicament and cannot be refilled for subsequent use. It is also required that the syringe must never be used in the opposite direction, or otherwise allow backflow, so that the liquid moves within the syringe in the opposite direction to the direction of delivery. Australian Patent No. 708445 discloses a basic syringe assembly which, at least in some embodiments, can provide this functionality. In particular, such syringe assemblies include a single sealed reserv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/19
CPCA61M2005/5046A61M5/288A61M5/002A61M5/3202A61M5/3271A61M2005/31598A61M2005/3128A61M5/31596A61M5/3213A61M2005/3247A61M2005/31508A61M5/348Y10T29/49826
Inventor 科林·坎贝尔·马歇尔·穆尔
Owner COLLYN PATENT HLDG
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