Pulse injection apparatus

Abstract

The invention discloses a pulse injection device which belongs to the technical field of the subcutaneous-administration device in the medical appliance. The pulse injection device comprises an ampoule mounted at the front end of a piezoelectric pulse push shot device and a drug storehouse. The ampoule comprises a cylinder body, wherein a minitype spray orifice is arranged at the front end part ofthe cylinder body, and an opening is arranged at the rear end thereof; a push rod is movably mounted in the cylinder body, and a piston is fixed at the front end of the push rod; and an interface which communicates with the drug storehouse is arranged on the front end wall of the cylinder body, and is positioned between the start position and the maximum stroke of the piston. The drug storehousecomprises a closed-type case body with a drug outlet, and a pressurizing system is mounted in the case body. A hose with a switch is sleeved between the drug outlet and the interface. The pulse injection device has the advantages of convenient drug fetch, high injection dosage, controllable injection depth, high injection dosage precision and controllable injection and drug release process.

Description

technical field [0001] The invention discloses a pulse injection device, which belongs to the technical field of subcutaneous drug delivery devices in medical equipment. Background technique [0002] Transdermal drug delivery system refers to a new dosage form that directly administers drugs on the surface of the skin, allowing the drug to pass through each layer of the skin and enter the systemic circulation to produce systemic or local therapeutic effects. As a non-invasive drug delivery route, the transdermal drug delivery system has obvious advantages, specifically: the drug absorption is not affected by complex factors such as the pH value in the digestive tract, food, and the moving time of the drug in the intestinal tract; The first-pass effect of the drug in the liver; it can produce a sustained, constant and controllable administration rate and blood concentration, reduce the number of administrations and doses, thereby reducing adverse reactions; improve the bioava...

AI Technical Summary

Problems solved by technology

[0005] There are still many deficiencies in the current jet injection system: (1) The small amount of injection is a common problem of various jet injection drug delivery systems, because the jet injection is only completed in one action, so the general administration volume is 0.1 ~ 1ml , the maximum injection volume in existing products does not exceed 1.5ml, if the injection volume is too large, it will cause severe pain; (2) The injection depth is uncontrollable, so when the injection depth is too deep, the jet touches the nervous system under the skin tissue It will be accompanied by a strong pain. Although the focused multi-nozzle can control the depth in theory, it is difficult to apply in practice due to the difficulty of processing; (3) The injection dose accuracy is poor, and the spring-powered injection The working stability of the syringe is poor, and it is easy to cause the difference in the dosage; (4) the injection release process (speed, frequency) is uncontrollable, because the power source of the syringe compresses the spring or the inherent characteristic parameters of the high-pressure gas (the stiffness of the spring or the pressure of the gas) Pressure) is given by the syringe system itself

Although from the text description of this patent, it has the advantages of convenience, safety, more stable injection flow and speed, easier control, and large injection dose, but it is difficult to implement in the actual application process, and the injection tube takes medicine. inconvenient

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