GB2420978A - Extensible needle cover preventing injury - Google Patents
Extensible needle cover preventing injury Download PDFInfo
- Publication number
- GB2420978A GB2420978A GB0426866A GB0426866A GB2420978A GB 2420978 A GB2420978 A GB 2420978A GB 0426866 A GB0426866 A GB 0426866A GB 0426866 A GB0426866 A GB 0426866A GB 2420978 A GB2420978 A GB 2420978A
- Authority
- GB
- United Kingdom
- Prior art keywords
- syringe
- tubular container
- housing
- syringe according
- guard tube
- 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.)
- Granted
Links
- 208000027418 Wounds and injury Diseases 0.000 title 1
- 230000006378 damage Effects 0.000 title 1
- 208000014674 injury Diseases 0.000 title 1
- 238000002347 injection Methods 0.000 claims abstract description 50
- 239000007924 injection Substances 0.000 claims abstract description 50
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 239000000126 substance Substances 0.000 claims abstract description 26
- 210000003811 finger Anatomy 0.000 claims description 3
- 210000003813 thumb Anatomy 0.000 claims description 3
- 239000000463 material Substances 0.000 description 5
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 206010016275 Fear Diseases 0.000 description 1
- 229940035674 anesthetics Drugs 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 206010012601 diabetes mellitus Diseases 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003193 general anesthetic agent Substances 0.000 description 1
- 239000003589 local anesthetic agent Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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
-
- 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
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
- A61M2005/206—With automatic needle insertion
-
- 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
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
- A61M5/2033—Spring-loaded one-shot injectors with or without automatic needle insertion
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
A syringe (2) for injecting a liquid substance (4), comprises a tubular container (6) for the liquid substance (4), an injection needle (8) which extends from a first end (10) of the container (6), a housing (12) extending over the container (6), a guard tube (14) extending over the injection needle (8) and the first end (10) of the container (6), and spring biasing means (16), the guard tube (14) being slideable over the container (6) and into the housing (12) when injection pressure is applied to the housing (12) for injecting the liquid substance (4), and the spring (16) being such that it biases the guard tube (14) in a direction out of the housing (12) whereby the guard tube (14) returns to its position over the injection needle (8) when the injection pressure is removed from the housing (12).
Description
A SYRINGE FOR INJECTING A LIQUID SUBSTANCE
This invention relates to a syringe for injecting a liquid substance.
There are many different types of known syringes for injecting a liquid substance. A problem that occurs with the known syringes is that diseases can be contracted by inadvertent pricks from a contaminated injection needle.
It is an aim of the present invention to obviate or reduce the above mentioned problem.
Accordingly, in one non-limiting embodiment of the present invention there is provided a syringe for injecting a liquid substance, which syringe comprises a tubular container for the liquid substance, an injection needle which extends from a first end of the tubular container, a housing which extends over the tubular container, a guard tube which extends over the injection needle and the first end of the tubular container, and spring biasing means, the guard tube being slideable over the tubular container and into the housing when injection pressure is applied to the housing for the purpose of injecting the liquid substance, and the spring biasing means being such that it biases the guard tube in a direction out of the housing whereby the guard tube returns to its position over the injection needle when the injection pressure is removed from the housing.
With the syringe of the present invention, the guard tube is able to protect the injection needle before the injection takes place, whilst the injection is taking place, and after the injection has taken place. Thus, the injection needle is protected at all times, so that the injection needle is not exposed and available for inadvertently pricking somebody, for example an operator, and thereby possibly causing the person to contract a disease if the injection needle is contaminated with such a disease.
Preferably, the guard tube is a non-transparent guard tube so that the injection needle cannot be seen through the guard tube. The use of the non-transparent guard tube is advantageous for patients who do not like being injected and who tend to become over anxious at the sight of a needle. The guard tube prevents the patients from seeing the needle and thus helps to avoid them becoming over anxious.
Preferably, the syringe is one in which the spring biasing means is a coil spring which is positioned between the tubular container and the housing, the coil spring having a first end which abuts against an abutment in the housing, and the coil spring having a second end which abuts against the guard tube.
The guard tube may have an end face which rests against a patient during use of the syringe. Preferably, the end face has a guide passage for guiding the injection needle through the end face during use of the syringe.
The guide passage may act to prevent unwanted sideways pressure being applied to the injection needle as it penetrates a patient's skin.
The tubular container may have a piston for forcing the liquid substance from the tubular container and out of the injection needle for injection purposes.
The piston may be movable along the tubular container by hand and/or by spring mover means.
The syringe may include a knob which is for receiving a finger or thumb of an operator and which is for sliding along the housing in order to move the piston by hand. The knob may slide in a guide slot in the housing.
The spring mover means may be a coil spring positioned in the tubular container. The coil spring may have a first end which abuts against an end of the tubular container, and a second end which operates on the piston.
The second end may operate directly or indirectly on the piston.
The syringe may include retraction means for manually retracting the piston whereby the syringe is self-aspirating. The aspiration may thus allow material of the tip of the syringe to be drawn into the tubular container before or during injection. The injection of local anesthetic directly into an artery can cause severe pain and transient homiplegia.
The syringe of the present invention may include automatic slow- release means for slowly releasing the liquid substance. The use of the automatic slow-release means enables the syringe to be kept small and short in length. This may help the syringe to be comfortable to hold and use.
The syringe may include manual override means for overriding the operation of the automatic slow-release means.
Preferably, the syringe is constructed to be disposable. In order to facilitate this, the syringe may be made of materials which are as cheap as possible, and which are also disposable in a safe and environmentally friendly manner as is possible.
The syringe of the present invention may be used in a wide variety of situations for injecting a wide variety of liquid substances. Thus, for example, the syringe may be used in dentistry for injecting liquid substances in the form of anesthetics. The syringe may also be used in hospitals and doctors surgeries for injecting whatever liquid substances may be appropriate for a patient. Still further, the syringe may be for home personal use, for example for person suffering from diabetes.
An embodiment of the invention will now be described solely by way of example and with reference to the accompanying drawing which is a longitudinal section of a syringe for injecting a liquid substance.
Referring to the drawing, there is shown a syringe 2 for injecting a liquid substance 4. The syringe 2 comprises a tubular container 6 for the liquid substance 4. An injection needle 8 extends from a first end 10 of the tubular container 6. The injection needle 8 will usually be a hollow bore injection needle 8. A housing 12 extends over the tubular container 6. A non-transparent guard tube 14 extends over the injection needle 8 and the first end 10 of the tubular container 6. The syringe 2 also comprises spring biasing means 16.
The guard tube 14 is slideable over the tubular container 6 and into the housing 12 when injection pressure is applied to the housing 12 for the purpose of injecting the liquid substance 4. The spring biasing means 16 is such that it biases the guard tube 14 in a direction out of the housing 12, whereby the guard tube 14 returns to its position over the injection needle 8 when the injection pressure is removed from the housing 12.
The spring biasing means 16 is a coil spring which is positioned as shown between the tubular container 6 and the housing 12. The coil spring has a first end 18 which abuts against an abutment 20 in the housing 12.
The coil spring has a second end 22 which abuts against the guard tube 14.
The guard tube 14 has an end face 24 which rests against a patient during use of the syringe. The end face 24 has a guide passage 26 for guiding the injection needle 8 through the end face 24 during use of the syringe. The guide passage 26 helps to prevent unwanted sideways pressure being applied to the injection needle 8 as it is pushed into a patient's skin.
The tubular container 6 has a piston 28 for forcing the liquid substance 4 from the tubular container 6 and out of the injection needle 8 for injection purposes. The piston 28 is movable along the tubular container 6 by hand and/or by spring mover means 30.
The syringe 2 includes a knob 32 which is for receiving a finger or thumb of an operator and which is for sliding along the housing 12 in order to move the piston 28 by hand. The knob 32 slides in a guide slot (not shown) in the housing 12.
The spring mover means 30 is a coil spring positioned in the tubular container 6. The coil spring has a first end 34 which abuts against an end 36 of the tubular container 6. The coil spring has a second end 38 which operates indirectly on the piston 28.
The syringe 2 includes retraction means 40 for manually retracting the piston 28 whereby the syringe 2 is self-aspirating. The retraction means is in the form of a connecting member which connects the piston 28 to the knob 32. Thus, aspiration is achieved simply by pushing the knob 32 in the opposite direction to that required for injection. As viewed in the drawing, sliding the knob 32 to the right will cause the piston 28 to move to the right in the tubular container 6, and thus to aspirate and draw fluid available to the injection needle 8 into the tubular container 6.
The syringe 2 includes automatic slow-release means (not shown) for slowly releasing the liquid substance. The syringe 2 further includes manual override means (not shown) for overriding the operation of the automatic slow-release means. The slow-release means enables the syringe 2 to be kept small in diameter and short in length.
The syringe 2 may be constructed of a wide variety of available materials currently used for known syringes.
Advantageously, the guard tube 14 is provided with a calibrated scale 42 for indicating to an operator of the syringe 2 how deep the injection needle 8 is in a patient's skin.
The guard tube 14 is made of a material that cannot be seen through so that the injection needle cannot be seen through the guard tube 14. The guard tube 14 may be made of coloured plastics materials in order to help to allay a patient's fears of syringes and injection needles.
It is to be appreciated that the embodiment of the invention described above with reference to the accompanying drawings has been given by way of example only and that modifications may be effected. Thus, for example, a different type of spring biasing means 16 to that shown in the drawing may be employed. The syringe 2 of the present invention may be used for injecting human patients and animal patients.
Claims (16)
1. A syringe for injecting a liquid substance, which syringe comprises a tubular container for the liquid substance, an injection needle which extends from a first end of the tubular container, a housing which extends over the tubular container, a guard tube which extends over the injection needle and the first end of the tubular container, and spring biasing means, the guard tube being slideable over the tubular container and into the housing when injection pressure is applied to the housing for the purpose of injecting the liquid substance, and the spring biasing means being such that it biases the guard tube in a direction out of the housing whereby the guard tube returns to its position over the injection needle when the injection pressure is removed from the housing.
2. A syringe according to claim I in which the guard tube is a nontransparent guard tube so that the injection needle cannot be seen through the guard tube.
3. A syringe according to claim 1 or claim 2 in which the spring biasing means is a coil spring which is positioned between the tubular container and the housing, the coil spring having a first end which abuts against an abutment in the housing, and the coil spring having a second end which abuts against the guard tube.
4. A syringe according to any one of the preceding claims in which the guard tube has an end face which rests against a patient during use of the syringe.
5. A syringe according to claim 4 in which the end face has a guide passage for guiding the injection needle through the end face during the use of the syringe.
6. A syringe according to any one of the preceding claims in which the tubular container has a piston for forcing the liquid substance from the tubular container and out of the injection needle for injection purposes.
7. A syringe according to claim 6 in which the piston is movable along the tubular container by hand and/or by spring mover means.
8. A syringe according to claim 7 and including a knob which is for receiving a finger or thumb of an operator and which is for sliding along the housing in order to move the piston by hand.
9. A syringe according to claim 8 in which the knob slides in a guide slot in the housing.
10. A syringe according to any one of claims 7 - 9 in which the spring mover means is a coil spring positioned in the tubular container.
11. A syringe according to claim 10 in which the coil spring has a first end which abuts against an end of the tubular container, and a second end which operates on the piston.
12. A syringe according to any one of the preceding claims and including retraction means for manually retracting the piston whereby the spring is self-aspirating.
13. A syringe according to any one of the preceding claims and including automatic slow-release means for slowly releasing the liquid substance.
14. A syringe according to claim 13 and including manual override means for overriding the operation of the automatic slow-release means.
15. A syringe according to any one of the preceding claims and which is constructed to be disposable.
16. A syringe for injecting a liquid substance, substantially as herein described with reference to the accompanying drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0426866A GB2420978B (en) | 2004-12-07 | 2004-12-07 | A syringe for injecting a liquid substance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0426866A GB2420978B (en) | 2004-12-07 | 2004-12-07 | A syringe for injecting a liquid substance |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0426866D0 GB0426866D0 (en) | 2005-01-12 |
| GB2420978A true GB2420978A (en) | 2006-06-14 |
| GB2420978B GB2420978B (en) | 2008-11-05 |
Family
ID=34073351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0426866A Expired - Fee Related GB2420978B (en) | 2004-12-07 | 2004-12-07 | A syringe for injecting a liquid substance |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2420978B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011129783A1 (en) | 2010-04-16 | 2011-10-20 | Ozlem Oktay | Injection needle cap apparatus that can be opened to both sides |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3469573B1 (en) * | 2016-06-08 | 2024-02-07 | SHL Medical AG | Administration mechanism for a medicament delivery training device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4894055A (en) * | 1988-12-28 | 1990-01-16 | Sudnak Paul J | Needle guard assembly for use with hypodermic syringes and the like |
| US5201708A (en) * | 1992-02-03 | 1993-04-13 | Timothy A. Kershenstine | Self-locking safety syringe |
-
2004
- 2004-12-07 GB GB0426866A patent/GB2420978B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4894055A (en) * | 1988-12-28 | 1990-01-16 | Sudnak Paul J | Needle guard assembly for use with hypodermic syringes and the like |
| US5201708A (en) * | 1992-02-03 | 1993-04-13 | Timothy A. Kershenstine | Self-locking safety syringe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011129783A1 (en) | 2010-04-16 | 2011-10-20 | Ozlem Oktay | Injection needle cap apparatus that can be opened to both sides |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0426866D0 (en) | 2005-01-12 |
| GB2420978B (en) | 2008-11-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20131207 |