Transcutaneous intratympanic injection trocar

Abstract

The invention relates to a transcutaneous intratympanic injection trocar. The trocar comprises an indwelling hose, a tailstock, a sealing cover and a puncture guide needle core; one end of the indwelling hose is connected with the tailstock, and the sealing cover is arranged on the tailstock; and the puncture needle core is detachably inserted into the indwelling hose. The trocar has the advantages that the indwelling hose of the trocar is indwelled under the skin of an external auditory canal through a minimally invasive surgery and can be used for repeated tympanic administration, so that injury caused by repeated tympanic membrane puncture is avoided. Meanwhile, the trocar is suitable for child patients who do not cooperate with repeated puncture and patients who are inconvenient to go to and go back to hospitals for treatment. The trocar is indwelled through a disposable operation, subsequent tympanic administration treatment can be completed at home, wounds caused by repeated puncture are reduced, time and traffic cost are saved, medical resources are saved, and convenience and economy are achieved.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a subcutaneous intratympanic injection trocar. Background technique [0002] Intratympanic steroid injection (ITS, intratympanic steroid) method has been widely used in inner ear diseases since the mid-1990s, such as patients with Meniere's disease, autoimmune inner ear diseases, sudden sensorineural deafness, and intractable secretory otitis media, etc. . In animal models, ITS has been found to have higher perilymphatic and endolymphatic steroid concentrations than systemic steroid use; furthermore, systemic steroid use has the following disadvantages: [0003] 1. It may affect multiple system functions; [0004] 2. Withdrawal reaction and rebound phenomenon; [0005] 3. Poor targeting: Corticosteroids are used orally and intravenously, and the distribution of hormones in plasma and systemic tissues is the basis of systemic side effects; [0006] 4. Low local concent...

AI Technical Summary

Problems solved by technology

[0003] 1. It may affect multiple system functions;

[0004] 2. Withdrawal reaction and rebound phenomenon;

[0005] 3. Poor targeting: Corticosteroids are used orally and intravenously, and the distribution of hormones in plasma and systemic tissues is the basis of systemic side effects;

[0006] 4. Low local concentration in the inner ear: Considering the impact of systemic administration of large doses of hormones on the various systems of the whole body, usually the treatment dose is relatively small, and the existence of the blood-labyrinth barrier makes it difficult for drugs to enter the inner ear. Therefore, the local concentration of hormones in the inner ear is lower, which may Lead to poor treatment effect of some patients;

[0007] 5. Immunosuppressive effect, long-term use can lead to hypercortisolism;

[0008] 6. Those with active peptic ulcer, diabetes, high blood pressure, history of epilepsy, mental illness, pregnant women or patients in the acute infection stage are not suitable for systemic use of high-dose hormones;

The disadvantage is that the amount of medicine that can be wrapped is limited, it is impossible to include the entire course of medicine, it is impossible to increase the pre-drug dosage, and it is impossible to reduce the dosage or stop the release according to the development of the disease, and the maneuverability is poor

And the sustained-release system cannot reach a higher peak concentration of the drug, and the therapeutic effect is limited

Moreover, the surgery involved involves the inner ear area, which is difficult and traumatic.

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