Special needle for implantable drug delivery apparatus

Abstract

The invention relates to a special needle for an implantable drug delivery apparatus. The special needle comprises a needle tube, a needle handle fixed to the needle tube, and an epitaxial tube communicating with the needle tube, wherein the needle tube is fixed to the needle handle, the needle tube communicates with one end of the epitaxial tube, the needle handle is fixed at a joint between theneedle tube and the epitaxial tube, the needle tube comprises a horizontal fixing section and a vertical working section, the fixing section and the working section are connected to form the L-shapedneedle tube, the fixing section of the needle tube is fixed to the needle handle and communicates with the epitaxial tube, the lower end of the working section of the needle tube is smoothly connectedwith an inwardly-bent puncture section through an arc-shaped transition section, the free end of the puncture section is cut through an oblique section to form a puncture tip and a liquid outlet holewith an opening at the side surface, and the oblique section on the puncture needle tip is parallel to the working section of the needle tube, so that a rear cutting edge of the oblique section slides into a puncture port approximately in parallel, the rear cutting edge does not have a cutting effect around the puncture port, cuttings of a punctured matter are avoided to enter the needle tube, and thereby the cuttings are avoided to enter a relevant fluid and then enter the human body.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a special needle for an implanted drug delivery device. Background technique [0002] The subcutaneous implantable drug delivery device is a new type of medical device that forms a "drug channel in the human body". It is used to bury guided area drug delivery in the body, and can provide repeated channels to selected target tissues or organs for use in cancer areas. Drug administration for chemotherapy, analgesic treatment and other diseases, so that drugs can be directly and repeatedly delivered to target tissues or organs through implantable drug delivery devices. Compared with the conventional intravenous or intramuscular injection method, it can increase the concentration of the local tissue or organ by tens to hundreds of times, and act on the target tissue for a long time. The adverse reactions caused by it can significantly improve the therapeutic effect. [0003...

AI Technical Summary

Problems solved by technology

[0003] Implantable drug delivery devices are generally made of stainless steel and silicone rubber materials, and are composed of a cavity, a drug feeding plug, a locking sleeve, and a catheter. The implantable drug delivery device is buried under the human skin through surgery, and the catheter is introduced Blood vessels, inject medicinal liquid into its cavity through puncture injection, so as to transport medicinal liquid to specific tissues or organs of the human body through the cavity and catheter, so as to improve the effect of drug treatment and reduce side effects. At present, puncture in clinical application Injection needles generally use a beveled needle tip with a hole at the top. During the puncture process, this beveled needle tip is easy to cut the drug plug and generate debris. The chipped debris will enter the body tissue with the drug liquid, which will cause adverse consequences.

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