Self-expanding drug sustained-release stent and taking and placing device thereof

Abstract

The invention relates to a self-expanding drug sustained-release stent and a taking and placing device thereof, which relates to the technical field of ear-nose-throat medical instruments. The self-expanding drug sustained-release stent comprises a sustained-release stent body, a self-expanding assembly, a connecting piece and symptomatic drugs. The self-expanding assembly comprises a positioningrod, a first elastic piece, a first sliding piece, a second sliding piece, a third sliding piece and a plurality of expanding supporting strips, nasal polyp at the diseased position of a patient can be expanded conveniently, further expanding is generating along with nasal polyp atrophy due to the weakened illness state of the patient, the precise medicine application is achieved, the treatment period is shortened, and the treatment effect is fully guaranteed. The taking and placing device for the self-expanding drug sustained-release stent comprises a first placing sleeve, a second placing sleeve and a clamping piece, the operation is easy and convenient, a nasal sinus stent can be conveniently taken and placed, the operation convenience of doctors is greatly improved, and surgical risksand postoperative sequelae risks are avoided.

Description

technical field [0001] The invention relates to the technical field of ear, nose and throat medical devices, in particular to a self-expanding drug slow-release stent and a pick-and-place device thereof. Background technique [0002] The sinuses, also known as paranasal sinuses and paranasal sinuses, are multiple air-filled bony cavities around the nasal cavity. The mucous membranes of the sinuses are connected with the nasal mucous membranes, so the inflammation of the nasal mucous membranes often spreads to the sinus mucous membranes, causing sinusitis. At present, it is believed that the pathogenesis of sinusitis is mainly due to the infection of the sinuses due to the obstruction of the sinus opening caused by various reasons. Among them, nasal polyps are an important reason for the obstruction of the opening of the sinuses, and the inflammatory stimulation of the sinuses in turn promotes the growth of nasal polyps. Form a vicious circle. [0003] The current treatment...

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Problems solved by technology

[0005] The above-mentioned prior art scheme has the following defects: the price of FESS operation is high, and the recurrence rate is high. The recurrence rate after surgery to remove nasal polyps is 30%-50%, and each patient needs to perform at least 1.5-4 operations on average , because the support strength of the drug sustained-release stent itself is low, it is often necessary to remove anatomical structures such as turbinates, nasal septum, nasal mucosa, and nasal polyps during surgery. This type of resection and reconstruction will destroy the natural filtration and reconstruction provided by these structures. Humidification function, leading to dryness, bleeding, scabbing, increased risk of infection, and may cause olfactory changes including hyposmia, dysosmia, parasmia, and anosmia

[0006] If conservative treatment is carried out by direct nasal administration, due to the blockage of swollen nasal polyps and other intranasal tissues in the diseased sinuses, the drug sustained-release stent is not rigid enough to directly squeeze and support nasal polyps and expand the sinus opening. Directly and accurately reach the lesion site, resulting in extremely slow drug treatment, nasal polyps cannot be cured in time, and the sinus ostium will still be blocked for a long time, making the treatment cycle too long

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