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Disposable double pointed injection needle, and an insulin injection system comprising a disposable double pointed injection needle

a double-pointed injection and insulin injection technology, which is applied in the field of insulin injection systems comprising disposable double-pointed injection needles, can solve the problems of clogging the bore of the injection needle, user is exposed to a great danger, and unwanted drop in blood sugar

Inactive Publication Date: 2003-07-24
LARSEN CARSTEN GERNER +4
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Doing so the user is exposed to a great danger, since the rotation must be done after the contaminated needle cannula has been retracted from the body of the patient.
If for instead insulin for treating diabetes is injected into the muscle tissue it will be absorbed in the body to quickly and an unwanted drop in the blood sugar may be the result.
Such short and thin needles cannot be used in connection with an ordinary hypodermic syringe where the medicine is drawn up from a vial prior to each injection since this requires the medicine to flow through the needle twice for every injection, which can result in clogging of the bore of the injection needle, especially if the medicine is a suspension.

Method used

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  • Disposable double pointed injection needle, and an insulin injection system comprising a disposable double pointed injection needle
  • Disposable double pointed injection needle, and an insulin injection system comprising a disposable double pointed injection needle
  • Disposable double pointed injection needle, and an insulin injection system comprising a disposable double pointed injection needle

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Embodiment Construction

[0012] These known short and thin injection needles are however not provided with any safety protective devices, while the safety protective sleeves known from the prior art would permanently cover a large part of the injection part of the injection needle thereby preventing a short injection needle from penetrating through the cutis layer, which layer usually is between 2 to 3 mm thick, and into the subcutis layer of a human body.

[0013] Injection needles with relatively thin diameter and with a length of the injection part of the needle cannula between 4 to 12 mm are often used for self-injection of insulin i.e. where the patient injects him or herself. However for self-injection in private settings, safety protective devices providing safety against accidental needle stick injuries are not considered to be important, since no other person beside the patient performing the self-injection has contact with the injection needle. Safety protective devices providing safety against accid...

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Abstract

A disposable double pointed injection needle has a needle hub to which a thin needle cannula is permanently fastened 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 injected 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.

Description

THE TECHNICAL FIELD OF THE INVENTION[0001] The invention relates to a disposable double pointed injection needle having an injection part with a skin piercing end and a cartridge part for inserting into a cartridge containing a liquid medicine to be injected subcutaneously. The cannula of the injection needle is fastened in a needle hub for mounting on a syringe, which syringe supports the cartridge into which the cartridge part of the injection needle penetrates.[0002] The invention further relates to an insulin injection system comprising a pen shaped syringe supporting a cartridge with insulin, a dose setting and injection mechanism and a disposable double pointed injection needle.DESCRIPTION OF RELATED ART[0003] Injections where a liquid is expelled into the human body are usually performed either as intramuscular injections i.e. injections into the muscle tissue, or as subcutaneously injections i.e. injections into the subcutaneous tissue lying between the cutis and the muscle ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61M5/24A61M5/32A61M5/34
CPCA61M5/24A61M5/3257A61M5/326A61M5/3272A61M2205/59A61M5/349A61M2005/3267A61M2205/583A61M5/347
Inventor LARSEN, CARSTEN GERNERSTENHOLT, LARSMOLIN, ANDERSREX, JORNLARSEN, BJORN GULLAK
Owner LARSEN CARSTEN GERNER
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