A kind of sleeve for dacryocystorhinostomy and preparation method thereof

Abstract

The invention discloses a cannula used for dacryocystorhinostomy and a preparation method thereof. The cannula includes a drainage pipe, an oval drainage disc and a tail fixing screw are arranged at both ends of the drainage pipe respectively, the drainage pipe is in a hollow shape, a conduction channel is formed in the drainage pipe, a canula body is arranged at the tail end of the drainage pipe,and the cannula body is fixed to the tail fixing screw at a hole forming place in a nasal cavity through a buckle. A hollow silica gel catheter is selected and penetrated to serve as the drainage pipe, and the two ends of the drainage pipe are both polished for assembly of components; according to shape requirements, heating for shaping is conducted on the drainage pipe, and the drainage pipe iscooled naturally after thermoplastic shaping and disinfected for use. More convenience is provided for implanting, the drainage pipe only needs to be implanted from a lower lacrimal punctum and then can reach the hole forming place, extra traction devices are not required, only few minutes are consumed, and complicated treatment such as knotting is not required in the nasal cavity, so that patients feel comfortable, and no secondary injuries are caused; by designing the drainage pipe in a hollow shape, tears can be drained normally, infection is not caused easily, and symptoms are alleviated obviously during implanting.

Description

technical field

[0001] The invention relates to the technical field of medical devices, in particular to a sleeve for dacryocystorhinostomy and a preparation method thereof. Background technique

[0002] Chronic dacryocystitis tends to occur in female patients. In addition to traditional eye surgery, the most commonly used method for its treatment is endoscopic dacryocystorhinostomy, which has been carried out in China for nearly 20 years. However, for For Chinese women, the volume of the lacrimal sac and nasal cavity is relatively small, which is likely to cause narrow adhesions or even atresia at the stoma, leading to recurrence after surgery failure, or even relapse. How to avoid it has always been a clinical problem. Most of the existing implant devices are designed for traditional ophthalmic surgery and are not suitable for the use of nasal endoscopic surgery. There are problems such as difficult implantation, many complications and poor comfort.

[0003] Most of the ...

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