WO2011107954A2

WO2011107954A2 - Single use safety syringe with spring actuated needle stick injury prevention and auto disable mechanism

Info

Publication number: WO2011107954A2
Application number: PCT/IB2011/050898
Authority: WO
Inventors: Atul Sardana
Original assignee: Atul Sardana
Priority date: 2010-03-03
Filing date: 2011-03-03
Publication date: 2011-09-09
Also published as: WO2011107954A3

Abstract

The present invention relates to a single use safety syringe (100) with a spring actuated needle cover to prevent needle stick injury and auto disabling of the syringe by locking of the plunger to the syringe to prevent reuse. The single use safety syringe (100) according to the present invention comprises a body (14), a plunger (29) a sheath (7) and a spring (10). At the end of the injection stroke, the 10 spring (10) actuates the sheath (7) which glides over the body (14) to cover a needle (2) attached to the body (14). Further pressing the plunger (29) locks the plunger (29) into the body (14) thereby rendering the syringe non-reusable.

Description

TITLE OF THE INVENTION

Single Use Safety Syringe with Spring Actuated Needle Stick Injury Prevention and Auto Disable Mechanism FIELD OF INVENTION

The invention relates to single use disposable syringes and more particularly to an improved single use safety syringe with a spring actuated needle cover to prevent needle stick injury and auto disabling of the syringe by locking of the plunger to the syringe to prevent reuse.

BACKGROUND OF THE INVENTION

Injections are the most common health care procedure worldwide. WHO reference definition for a safe injection states that, "A safe injection does not harm the recipient, does not expose the provider to any avoidable risk and does not result in any waste that is dangerous for other people."

Once an injection is administered and the needle is withdrawn, it is contaminated with the blood of the patient which may contain microorganisms. Thereafter any pricking of the contaminated needle to another person or healthcare worker carries with it the risk of transferring these microorganisms from the patient to the other person or healthcare worker.

It is well documented that such injuries occur most often to nurses, followed by physicians and most injuries occur while administering injections.

Unsafe injection practices remain a major challenge worldwide. Unsafe injections place patients at risk of disability and death. Unsafe injection practices include reuse of syringes and needle stick injuries to healthcare workers and other members of the society. There is a huge global burden of diseases such as AIDS, Hepatitis C and Hepatitis B, that is added on each year due to these. According to the estimates produced for the 2003 Global Burden of Disease Study, unsafe injections are responsible every year worldwide for 21 million new hepatitis B cases (HBV) accounting for 33% of new cases, 2 million hepatitis C infections (HCV) accounting for 42% new cases and 260 000 HIV infections accounting for 5.4% new cases.

It is estimated that every 24 seconds a person dies as a result of receiving an unsafe injection. A recent study indicates that each year, unsafe injections cause an estimated 1.3 million early deaths (the toll from reuse of syringes now exceeds that of malaria), a loss of 26 million years of life and an annual burden of US$ 535 million in direct medical cost. [The Cost Of Unsafe Injections, M.A. Miller & E. Piscani; Bulletin of the World Health Organization, vol.77, no.10, 808-811.]

The development of the syringe and needle has gone through various phases that can be broadly seen in four generations:

The First Generation of syringes and hypodermic needle are the most prevalent form of device available worldwide. It has no auto disable or needle stick injury prevention mechanism.

The Second Generation syringes have auto disable features such as a locking ring or tab or break away plungers but require active participation of the user to deploy these. Once the auto-disable feature has been activated it is not possible to re-use the syringe under the normal conditions of use. The second generation syringes address the problem of reuse but do not prevent the risk of inadvertent needle stick injury or reuse of the needle.

The Third Generation of syringes offers needle stick injury prevention mechanism by deployment of a sheath or retraction of the needle into the barrel thereby covering the needle and rendering the syringe unusable. However, these require active participation of the user to deploy these and the success is operator dependant. It requires active training of the user and the disposal handling staff.

Although the Second and Third generation syringes provide at least one safety feature, they cost significantly more than the conventional first generation syringe.

The Fourth Generation of syringes incorporates both auto disable and needle stick injury prevention features in the same syringe and has the advantage of auto deployment of these features thereby reducing operator dependency and ensuring compliance. The fourth generation syringes though most desirable in terms of features and safety characteristics and have the following limitations:

1. They cost significantly more than the cost of previous generation syringes owing to a number of factors such as the large number of parts, enhanced production time and labor cost required for assembling these syringes and the expensive materials and methods used for construction.

2. Most such syringes are available with a fixed needle attached to the syringe thereby limiting the choice and option of the healthcare worker to change the needle.

3. Most manufactures use cumbersome mechanisms and designs because of which there is a need for training of the user. As it is little money exists for innovative training programs and healthcare workers are often too busy to attend these or read professional publications. Several industry leaders feel that workers often opt not to use safety syringes because they don't know how to operate them.

4. A large number of these are sold in pre-filled syringe form and hence there is a limitation of independence of drug choice.

5. These syringes have delicate lock mechanisms and are prone to accidental firing during transportation and handling thereby rendering the syringe unusable unintentionally. 6. Most of these syringes are designed in such a way that they are made up of special engineering plastics with special properties thereby making their input costs higher by many folds. WO 03/101513 describes a safety syringe provided with an outer sleeve that is automatically guided into a position of safety, once the injection has been completed. However, it does not disclose an auto disable feature whereby the plunger is locked to prevent re-use of the syringe. Further, it does not cover 360 degrees of the lock and hence has a chance of accidental firing if the syringe is not handled carefully.

US Patent No. 5,049,133 provides a safety-syringe wherein a spring is coiled around a needle with a hollow core. The spring is capable of expanding to retract the needle into the body of the syringe. The construction of this syringe involves many intricate parts resulting in high manufacturing costs. The needle in the syringe is also fixed. Furthermore, since the mechanism of retraction of the spring is very delicate it results in increased probability of the syringe being accidentally fired.

WO 2006/105583 discloses a safety syringe incorporating a means for causing retraction of the needle into the syringe barrel by engaging the plunger of the syringe with the hub of the needle. However, it requires active participation of the user to pull the plunger back to retract the needle into the body.

US Patent No. 5, 057, 086 discloses a sliding needle cover mounted on the syringe to prevent accidental needle pricks. This spring loaded syringe needs to be manually retracted back while injecting. Hence it requires a two hand operation to initiate the safety mechanism. Further, since the user's hands stay in front of the safety mechanism it poses higher risk of injury while operating. Also this syringe provides no feature to prevent reuse. US Patent No. 5,460,611 discloses a safety syringe wherein the needle is covered by a sleeve on the action of a pushroad being pushed by the plunger at the end of the injection process. US Patent No. 5,720, 727 also discloses a safety syringe wherein the needle is covered with a sheath before it is removed from the patient. However, both the syringes feature a fixed needle, require active participation of the user to initiate the safety mechanism and do not include any feature for preventing its reuse. This syringe has only limited application especially for deep injections such as intra muscular since the drug would be delivered to varying depth as one goes on injecting because needle will keep getting covered. Also a very small length of the needle is exposed during injection so to gain a deeper penetration the user has to insert the sleeve into the body thereby increasing possibility of vein damage in IV injections.

WO 99/37345 discloses a syringe with a slidably fitted needle-covering sleeve. This syringe is built up of a number of parts resulting in high cost of production, it does not provide an auto disable feature to prevent its reuse and also has high probability of accidental firing of the syringe. Furthermore, this syringe has a radially expanding lock which would require force to activate it which increases the possibility of injuring the patient during the injection process, especially during IV injections.

There is more recognition than ever before that injection safety represents a very cost effective intervention in preventing the transmission of blood borne pathogens, mainly Hepatitis B, hepatitis C and HIV to patients through reuse of injection equipment and mishandling of multi dose vials, to health care workers through needle stick injuries and to the community at large through improper sharps waste management. The foregoing problems are solved and a technical advance is achieved in an illustrative Single Use Safety Syringe with Spring Actuated Needle Stick Injury Prevention and Auto Disable Features.

OBJECTS OF THE INVENTION The object of the present invention is to provide a single use safety syringe for hypodermic injection with auto disable mechanism and needle stick injury prevention mechanism. Yet another object of the present invention is to provide a single use safety syringe which does not require active participation of the user in activating the needle stick injury prevention mechanism.

Yet another object of the present invention is to provide a single use safety syringe which is capable of administering any medication for injection.

Yet another object of the present invention is to provide a single use safety syringe which can be used for any form of hypodermic injection such as IV (Intravenous), IM (Intramuscular), SC (Subcutaneous).

Yet another object of the present invention is to provide a single use safety syringe which can be used for phlebotomy (to draw blood for investigations) and then disposed safely. Yet another object of the present invention is to provide a single use safety syringe which has an option for interchangeable needles and freedom of choice to user.

Yet another object of the present invention is to provide a single use safety syringe which has minimum number of parts for assembling the syringe.

Yet another object of the present invention is to provide a single use safety syringe which requires minimum or no training at all to healthcare workers for use.

Yet another object of the present invention is to provide a single use safety syringe having the safety feature integral to the design. Yet another object of the present invention is to provide a single use safety syringe compatible with universally available needles and accessories.

Yet another object of the present invention is to provide a single use safety syringe that is permanently disabled after safety mechanism is activated.

Yet another object of the present invention is to provide a single use safety syringe wherein the hands and fingers of the user stay behind the needle when the safety mechanism is activated to minimize the risk of accidental injury to the user.

Yet another object of the present invention is to provide a single use safety syringe use of the syringe should be as similar to the use of a conventional syringe as possible.

Yet another object of the present invention is to provide a single use safety syringe capable of one handed operation by the user.

Yet another object of the present invention is to provide a single use safety syringe having a design that is be adaptable to all existing sizes of syringes commonly used for injection purpose.

Yet another object of the present invention is to provide a single use safety syringe which is extremely safe and able to prevent accidental injury after use thereof.

Yet another object of the present invention is to provide a single use safety syringe which practical, versatile, economical and easy to make.

SUMMARY OF INVENTION

The present invention relates to a single use safety syringe with a spring actuated needle cover to prevent needle stick injury and auto disabling of the syringe by locking of the plunger to the syringe to prevent reuse. BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is an exploded axonometric view illustrating the single use safety syringe according to the present invention.

Figure 2 is an exploded axonometric view illustrating another embodiment of the single use safety syringe according to the present invention.

Figure 3 is a cross sectional view of the single use safety syringe according to the present invention as assembled.

Figure 4 is a cross sectional view of the single use safety syringe according to the present invention at the end of an injection stroke. Figure 5 is a cross sectional view of the single use safety syringe according to the present invention at the final stage where the plunger gets locked with the body rendering the syringe locked and non reuseable.

DETAILED DESCRIPTION OF THE INVENTION

The foregoing problems are solved and a technical advance is achieved in an illustrative single use safety syringe with spring actuated needle stick injury prevention and auto disable features.

A single use safety syringe according to the present invention, designated as a whole by reference numeral (100), is described with the aid of the accompanying figures.

Referring to Figure 1, a single use safety syringe (100) according to a first embodiment of the present invention comprises a body (14), a plunger (29) a sheath (7) and a spring (10). The body (14) has an inside surface (25) defining a chamber (26) for holding the product intended for injection. At a distal end (27) (injector side) of the body (14) there is a luer connector (11) to connect with the needle hub (3) of any generic, hollow core hypodermic needle (2). The user may select to use any generically available hypodermic needle for the process. The needle (2) may be covered by a needle carrier (1) prior to use of the syringe. The luer connector (11) is placed at the center of the distal end (27) of the body (14).

Also located on the distal end (27) is a spring housing profile (12) circumferentially positioned on the distal end (27) meant to securely house a spring (10). The spring housing profile (12) is placed centrally around the luer connector (11).

The proximal end (17) (plunger side) of the body (14) is outwardly open. The body (14) has an outer surface (28). A lock deploy mechanism (16) and a pair of side flanges (15) are positioned near the proximal end (17) on the outer surface (28) and occupy the margins of the distal end (27). The side flanges (15) extend outwards at nearly perpendicular directions from the body (14) and assist the process of filling and injecting by providing a grip for counter pressure.

A check profile (13) is positioned circumferentially near the distal end (27). The inside surface (25) of the body (14) is cylindrically smooth to allow uninhibited movement of a plunger (29).

A plunger (29) can slide inside the chamber (26) of the body (14). It comprises a stopper (38) located on the plunger distal end (30), a stem (22) which may be tubular or cross sectional. The stopper (38) may be either a plastic disc (21) of adequate size or an elastomeric seal (18) or both to prevent leakage of the product intended for injection. The elastomeric seal may be attached to the stem (22) by means of an attachment means of plunger (20) and the attachment means of elastomeric seal. The plastic disc (21) may be molded as a part of the stem (22). The lock deployer profile (23) is triangular in shape on cross section with its base (32) fixed to the inner margin of the plunger proximal end (24). It extends radially inwards 360 degrees of the inner margin of the plunger proximal end (24). The sheath (7) is a hollow tubular component made of such dimensions that it may easily glide over the body (14) of the syringe and cover the entire needle (2). It has a smooth curved sheath distal end (8) with an opening (4) for the luer connector (11) of the body (14) to project out sufficiently so that the user may comfortably apply and change any generic hypodermic needle (2). A counter spring housing profile (5) is positioned on a inner side (31) of the sheath distal end (8) to securely house the spring (10) that is loaded between the spring housing profile (12) on the body (14) and the sheath distal end (8).

A sheath proximal end (9) has on its inner side, has a counter check profile (6) which locks to the lock deploy mechanism (16) to hold the sheath (7) over the body (14) prior to the injection process.

A spring (10) is made of suitable material with adequate elasticity and recoil. It is shaped as compression coil spring that is positioned between the spring housing profile (12) on the outer surface (28) of the body (14) and the counter spring housing profile (5) on the sheath (7). The spring (10) is kept in the compressed state prior to the injection process.

Referring to Figure 2, the single use safety syringe (100) has another embodiment where the luer connector (11) is placed eccentrically near the margin of the distal end (27) of the body (14). The opening (4) is placed on the margin of the sheath distal end (8). The spring housing profile (12) is positioned centrally on the distal end (27) of the body (14). This placement allows the needle (2) to have closer contact with the patient's body especially when the placement of the needle is desired to be at acute angles to the patient's body. Referring to Figures 3, 4 and 5, these show the positions of the single use safety syringe according to the present invention before and at the end of the injection process. Figure 3 shows the single use safety syringe (100) of the present invention in the position it is assembled with the sheath (7) retracted and spring (10) compressed between the spring housing profile (12) on the body (14) and the counter spring housing profile (5) on the sheath (7) and the needle (2) exposed. The counter check profile (6) is engaged with the lock deploy mechanism (16) thereby locking the sheath (7) is locked onto the body (14).

During assembly when the sheath (7) glides over the body, the counter check profile (6) on the inner side of the sheath (7) depresses the lock deploy mechanism inwards (16) into the body (14) of the syringe and locks the sheath (7) in a charged position. In this position the spring housed between the syringe body spring housing profile and the sheath counter spring housing profile is compressed and charged.

Referring to Figure 4 it shows the single use safety syringe according to the present invention at the end of an injection stroke.

When the plunger (29) is moved axially forward inside the body (14), at the end of the injection stroke, the lock deployer profile (23) on the plunger proximal end (24) presses the lock deploy mechanism (16) thereby releasing sheath (7) due to disengagement of the counter check profile (6) from the lock deploy mechanism (16). The sheath (7) glides coaxially over the body (14) and covers the needle (2) due to expansion of the spring (10) housed between the spring housing profile (12) positioned on the body (14) and the counter spring housing profile (5) located on the sheath (7). On completion of the injection stroke, the counter check profile (6) engages with the check profile (13) positioned on the body (14) thereby preventing the spring actuated sheath (7) from overshooting the body (14) once it is glides axially forward to cover the needle (2) due to the expansion of the spring (10) thereby minimizing the risk of injury to the patient.

The lock deploy mechanism (16) is a profile reciprocally placed in a pair on the outer surface (28) of the proximal end (17) of the body (14). It occupies a certain percentage of the outer surface area. Moving from distal end (27) of body (14) to the proximal end (17), it consists of an outward slope (33) extending radially outward, abruptly terminating in a straight fall inwards to a specified level, forming an angled surface (34) in an axis perpendicular to the axis of the syringe and then forming a curved bottom ditch (35) to the height of the thickness of the wall of body (14). On returning back to specified level, it again forms an inward slope (36) dropping into the inside surface (25) of the body (14) to form the proximal end (17).

The lock deploy mechanism (16) is in the form of reciprocally located two strips, that are separated from the rest of the proximal portion of the syringe by a predetermined gap (37). The width of this gap is determined by the circumference of the body (14). The area of the proximal end (17) that is not occupied by the lock deploy mechanism (16) extends perpendicularly outwards to serves as the side flanges (15).

Referring to Figure 5, it shows the disposable syringe according to the present invention on further pressing the plunger (29) into the body (14) which results in the lock deployer profile (23) getting locked into the ditch (35) of the lock deploy mechanism (16) thereby rendering the syringe disabled and ineffective for reuse. The plunger (29) may also contain a safety tab so designed that it may be fitted onto the member or stem (22) near the plunger proximal end (24) to act as a mechanical barrier from accidental or unintended, complete compression of the plunger (29) into the body (14). The safety tab is a small piece of plastic shaped to cover the stem in such a way that whole or part of it projects outwards to such a distance that it extends beyond the distal margin of the body. This safety tab is so designed that it is easily removed prior to the using the syringe for injecting the desired product, and achieving the end result of releasing the sheath (7) and locking the plunger (29) inside the body (14).

The single use safety syringe according to the present invention is useful for therapeutic purposes and also for phlebotomy (to draw blood for investigations). The syringe may be constructed from a wide range of materials

The single use safety syringe according to the present invention can be used for delivering any form of hypodermic injection such as IV (Intravenous), IM (Intramuscular), SC (subcutaneous).

This single use safety syringe of the present invention may be constructed in various capacity configurations of the body to house the product for injection. Preferably, the capacities of the syringe of the present invention may manufactured but not limited to 1ml, 2ml, 5ml or 10ml.

In an embodiment, the present invention provides, a single use safety syringe (100) comprising:

a body (14) having an inside surface (25) defining a chamber (26) for holding a product intended for injection, a distal end (27) having a luer connector (11) to connect a needle hub (3), a spring housing profile (12) and a check profile (13) positioned circumferentially on said distal end (27), a proximal end (17) that is outwardly open, an outer surface (28) having a pair of side flanges (15) and a lock deploy mechanism (16) located near said proximal end (17);

a plunger (29) slidably located within said body (14), said plunger (29) having a plunger distal end (30) having a stopper (38) to prevent leakage of the product intended for injection, a stem (22) , and a plunger proximal end (24) having a lock deploy er profile (23);

a sheath (7) slidably mounted over said body (14), said sheath (7) having a sheath distal end (8) and a sheath proximal end (9), said sheath distal end (8) having on its inner side (32) a counter spring housing profile (5) and an opening (4) for said luer connector (11), said sheath proximal end (9) having a counter check profile (6) circumferentially positioned to engage with said lock deploy mechanism (16) to hold said sheath (7) over said body (14) before the injection process; and

a spring (10) compressed between said spring housing profile (12) and said counter spring housing profile (5);

wherein when the plunger (29) is axially slid towards said distal end (27) of said body (14), said lock deployer profile (23) positioned on the plunger proximal end (24) engages with said lock deploy mechanism (16) thereby releasing said sheath (7) resulting in a forward motion of said sheath (7) over said body (14) due to expansion of said spring (10) till said counter check profile (6) engages with the check profile (13) thereby stopping the forward motion of the sheath (7) and locking the plunger proximal end (24) to said lock deploy mechanism (16).

In another embodiment the present invention provides a single use safety syringe (100) further comprising a needle (2) attached to a needle hub (3).

In another embodiment the present invention provides a single use safety syringe (100) wherein said needle (2) is provided with a needle carrier (1) prior to use of the syringe.

In another embodiment the present invention provides a single use safety syringe (100) wherein the body (14) and the sheath are constructed from plastics or their blends. In another embodiment the present invention provides a single use safety syringe (100) wherein the body (14) is constructed from plastics selected from the group consisting of polycarbonate, polyurethane, polyvinyl chloride (PVC,) polyacetal and polypropylene, preferably polypropylene. In another embodiment the present invention provides a single use safety syringe (100) wherein the sheath (7) is constructed from plastics selected from the group consisting of polycarbonate, polyurethane, polyvinyl chloride (PVC,) polyacetal and polypropylene, preferably polypropylene.

In another embodiment the present invention provides a single use safety syringe (100) wherein the syringe (100) is constructed in capacities selected from the group consisting of 1ml, 2ml, 5ml and 10ml.

In another embodiment the present invention provides a single use safety syringe (100) wherein the needle (2) can be any hypodermic needle meant for IV, IM or SC injection having any length any gauge.

In another embodiment the present invention provides a single use safety syringe (100) wherein the spring (10) is a coil spring. In another embodiment the present invention provides a single use safety syringe (100) wherein the spring (10) is made of metals, alloys, or mixtures thereof, preferably steel.

In another embodiment the present invention provides a single use safety syringe (100) wherein the stopper (38) is selected from the group consisting of a plastic disc (21), elastomeric seal (18), or both.

In another embodiment the present invention provides a single use safety syringe (100) wherein the elastomers for the elasatomeric seal may be silicon, rubber, polyurethane, polyethylene or mixtures thereof.

Yet another embodiment of the present invention provides a single use safety syringe (100) wherein the lock deploy mechanism (16) comprises an outward slope (33) extending radially outward, an angled surface (34) in an axis perpendicular to the axis of the syringe (100), a curved bottom ditch (35), and an inward slope (36) dropping into the inside surface (25) of the body (14) to form the proximal end (17). In another embodiment the present invention provides a single use safety syringe (100), wherein the lock deploy mechanism (16) is reciprocally placed in a pair on the outer surface (28) of the proximal end (17) of the body (14).

Yet another embodiment of the present invention provides a single use safety syringe (100) wherein the lock deploy er profile (23) extends radially inwards from a base (32) of the plunger proximal end (24). In another embodiment the present invention provides a single use safety syringe (100) wherein the stem (22) is metallic or plastic.

In another embodiment the present invention provides a single use safety syringe (100) wherein the plunger (29) further comprises a safety tab.

In another embodiment the present invention provides a single use safety syringe (100) wherein the syringe (100) is prefilled with medication intended for injection.

In another embodiment the present invention provides a single use safety syringe (100) wherein the luer connector (11) is placed in the center of the distal end (27) of the body (14).

In another embodiment the present invention provides a single use safety syringe (100) wherein the luer connector (11) is placed eccentrically at the distal end (27) of the body (14).

The details of the construction or composition of various elements of the Single Use Safety Syringe with Spring Actuated Needle Stick Injury Prevention and Auto Disable Features not otherwise disclosed are not believed to be critical to the achievement of the advantages of the present product, so long as the elements possess the strength, flexibility, elasticity and hardness needed for them to perform as disclosed. The selection of details of such construction is believed to be well within the ability of one of even rudimentary skills in this area, in view of the present disclosure and is within the spirit of this design and scope of the claims.

Claims

I claim

1. A single use safety syringe (100) comprising: a body (14) having an inside surface (25) defining a chamber (26) for holding a product intended for injection, a distal end (27) having a luer connector

(11) to connect a needle hub (3), a spring housing profile (12) and a check profile (13) positioned circumferentially on said distal end(27), a proximal end (17) that is outwardly open, an outer surface (28) having a pair of side flanges (15) and a lock deploy mechanism (16) located near said proximal end (17); a plunger (29) slidably located within said body (14), said plunger (29) having a plunger distal end (30) having a stopper (38) to prevent leakage of the product intended for injection, a stem (22) , and a plunger proximal end (24) having a lock deployer profile (23); a sheath (7) slidably mounted over said body (14), said sheath (7) having a sheath distal end (8) and a sheath proximal end (9), said sheath distal end (8) having on its inner side (32) a counter spring housing profile (5) and an opening (4) for said luer connector (11), said sheath proximal end (9) having a counter check profile (6) circumferentially positioned to engage with said lock deploy mechanism (16) to hold said sheath (7) over said body (14) before the injection process; and a spring (10) compressed between said spring housing profile (12) and said counter spring housing profile (5) . wherein when the plunger (29) is axially slid towards said distal end (27) of said body (14), said lock deployer profile (23) positioned on the plunger proximal end (24) engages with said lock deploy mechanism (16) thereby releasing said sheath (7) resulting in a forward motion of said sheath (7) over said body (14) due to expansion of said spring (10) till said counter check profile (6) engages with the check profile (13) thereby stopping the forward motion of the sheath (7) and locking the plunger proximal end (24) to said lock deploy mechanism (16).

2. The single use safety syringe as claimed in claim 1, further comprising a

needle (2) attached to a needle hub (3).

3. The single use safety syringe as claimed in claim 2, wherein said needle (2) is provided with a needle carrier (1) to cover the needle (2) prior to use of the syringe (100).

4. The single use safety syringe as claimed in claim 1, wherein the stopper (38) is selected from the group consisting of a plastic disc (21), elastomeric seal (18), or both.

5. The single use safety syringe as claimed in claim 1 wherein the lock deploy mechanism (16) comprises an outward slope (33) extending radially outward, an angled surface (34) in an axis perpendicular to the axis of the syringe (100), a curved bottom ditch (35), and an inward slope (36) dropping into the inside surface (25) of the body (14) to form the proximal end (17).

6. The single use safety syringe as claimed in claim 5, wherein the lock deploy mechanism (16) is reciprocally placed in a pair on the outer surface (28) of the proximal end (17) of the body (14).

7. The single use safety syringe as claimed in claim 1 wherein the lock deployer profile (23) extends radially inwards from a base (32) of the plunger proximal end (24).

8. The single use safety syringe as claimed in claim 1 wherein the syringe (100) is prefilled with a product intended for injection.

9. The single use safety syringe as claimed in claim 1 wherein the luer connector (11) is placed in the center of the distal end (27) of the body (14).

10. The single use safety syringe as claimed in claim 1 wherein the luer connector (11) is placed eccentrically at the distal end (27) of the body (14).