Disposable double pointed injection needle, and an insulin injection system comprising a disposable double pointed injection needle
First Claim
1. A disposable double pointed injection needle comprising an elongated cannula (1) having two sharpe ends (2,3) and a relatively thin outside diameter, said needle cannula (1) being firmly fastened in a needle hub (4) having a distal end (5) and a proximal end (6), said proximal end (6) being provided with a fastening mechanism (7) for mounting said needle hub (4) on to a syringe, which syringe comprises a dose setting and injection mechanism and a cartridge (12) containing a liquid medicine to be injected subcutaneously into a human body (11) and from which cartridge (12) doses of medicine are expelled through a longitudinal bore in said cannula (1) utilizing the dose setting and injection mechanism, said needle cannula (1) having an injection part (8), and a cartridge part (9), which cartridge part (9) for inserting into the cartridge is covered by said needle hub (4), the injection part (8) which is the part (8) entering into the human body (11) during injection has a overall length short enough to secure subcutaneously injection and the cartridge part (9) has an overall length long enough to extend into the interior of the cartridge (12) when said injection needle is fastened onto said syringe, characterized in that said injection needle further is provided with a movable needle protector arranged on said needle hub (4) and which movable needle protector (10) can be moved into, and irreversible locked in, a position where the movable needle protector (10) covers the skin piercing end (2) of the injection part (8) of said needle cannula (1) thereby preventing needle stick injuries.
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Abstract
A disposable double pointed injection needle has a needle hub to which a thin needle cannula is permanently fasten and which needle hub can be mounted on to a syringe comprising a dose setting and injection mechanism and a cartridge containing a liquid medicine to be infected subcutaneously into a human body. The needle hub is provided with a safety shield guided on the outside surface of the needle hub. The safety shield is urged in a direction away from the needle hub by a spring located between the needle hub and the safety shield. The safety shield has a number of protrusions guided in guiding tracks on the outside surface of the needle hub. The guiding tracks are designed such that the safety shield during injection is moved towards the needle hub, and after injection is moved away from the needle hub by the spring and locked in an irreversible position where the safety shield covers the needle cannula and prevents accidental needle stick injuries.
133 Citations
17 Claims
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1. A disposable double pointed injection needle comprising an elongated cannula (1) having two sharpe ends (2,3) and a relatively thin outside diameter,
said needle cannula (1) being firmly fastened in a needle hub (4) having a distal end (5) and a proximal end (6), said proximal end (6) being provided with a fastening mechanism (7) for mounting said needle hub (4) on to a syringe, which syringe comprises a dose setting and injection mechanism and a cartridge (12) containing a liquid medicine to be injected subcutaneously into a human body (11) and from which cartridge (12) doses of medicine are expelled through a longitudinal bore in said cannula (1) utilizing the dose setting and injection mechanism, said needle cannula (1) having an injection part (8), and a cartridge part (9), which cartridge part (9) for inserting into the cartridge is covered by said needle hub (4), the injection part (8) which is the part (8) entering into the human body (11) during injection has a overall length short enough to secure subcutaneously injection and the cartridge part (9) has an overall length long enough to extend into the interior of the cartridge (12) when said injection needle is fastened onto said syringe, characterized in that said injection needle further is provided with a movable needle protector arranged on said needle hub (4) and which movable needle protector (10) can be moved into, and irreversible locked in, a position where the movable needle protector (10) covers the skin piercing end (2) of the injection part (8) of said needle cannula (1) thereby preventing needle stick injuries.
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12. An insulin injection system comprising a pen shaped syringe supporting a cartridge (12) with insulin, a dose setting and injection mechanism and a disposable double pointed injection needle, which double pointed injection needle comprises an elongated needle cannula (1) firmly fastened in a needle hub (4) exchangeable connected to said pen shaped syringe, and where the insulin are expelled from said cartridge (12) through a longitudinal bore in the needle cannula (1) utilizing the dose setting and injection mechanism, characterized in that said double pointed injection needle further is provided with a movable needle protector (10) arranged on said needle hub (4) and which movable needle protector (10) can be moved into, and irreversible locked in, a position where the movable safety protector (10) covers the skin piercing end (2) of the injection part (8) of said needle cannula (1) thereby preventing needle stick injuries.
Specification