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CN-121987386-A - Naris blocking device after congenital based on 3D printing technology

CN121987386ACN 121987386 ACN121987386 ACN 121987386ACN-121987386-A

Abstract

The invention relates to the technical field of medical equipment, in particular to a device for locking a congenital naris based on a 3D printing technology, wherein parameters such as taper, length, diameter and the like of an expansion block are customized according to age and weight, the length of a matched connection belt is in fine adjustment design, the device comprises a naris expansion pipe, the connection belt and a needle buckle, the expansion pipe is in a symmetrical structure and is internally hollow and integrally arranged in a conical shape, the outer layer of the naris expansion pipe is coated with a medical-grade technological drug coating, the drug coating is used for inhibiting scar and granulation hyperplasia, the inner side wall of the nasal cavity of different individuals is uniformly stressed, the problem that the traditional universal device supports too strong pressing mucous membrane or supports insufficiently and prevents stenosis and failure is avoided, the needle buckle is doubly fixed through internal lamination and external reverse tension, the hidden trouble that the traditional device is easy to shift and fall is solved, no airway foreign body risk is avoided, medical staff can quickly finish device implantation, adjustment and extraction, and adaptation to clinical operation and postoperative care scenes.

Inventors

  • ZHANG JUNJUN

Assignees

  • 中国人民解放军空军军医大学

Dates

Publication Date
20260508
Application Date
20260127

Claims (8)

  1. 1. The utility model provides a treatment congenital posterior naris locking device based on 3D printing technology, includes posterior naris expansion tube (1), connecting band (2) and needle buckle (3), expansion tube (1) is symmetrical structure and inside cavity is whole to be the toper setting, posterior naris expansion tube (1) skin scribbles medical grade technology medicine coating, the medicine coating is used for inhibiting scar and granulation hyperplasia, is used for realizing the expansion of posterior naris shaping postoperative nasal passage to prevent posterior naris from relocking; The nasal cavity correction device is characterized in that one side of the expansion tube (1) close to a nasal septum is fixedly connected with one end of a connecting band (2), a male buckle is arranged at the left end of the connecting band (2), a female buckle is arranged at the right end of the connecting band (2), the male buckle at the left end of the connecting band (2) bypasses a small nasal post and is connected with the female buckle in a right nasal cavity so as to avoid displacement and falling off of the device in the nasal cavity, the connecting band (2) is detachably connected through the cooperation of the male buckle and the female buckle, the whole length design is different for measuring data of different patients, the expansion tube (1) is manufactured in a customized mode by adopting a 3D printing perfusion method, the whole anatomical structure data is acquired by scanning the nasal cavity and a rear nostril region of a patient before manufacturing, a printing model is generated after three-dimensional reconstruction and optimal design, and accurate adaptation of the nasal cavity morphology of the expansion tube (1) and the individual nasal cavity of the patient is ensured, and the problem of poor anatomical shape of the traditional standardized device is solved.
  2. 2. The device for treating congenital postnaris locking based on the 3D printing technology according to claim 1, wherein the personalized design of the expansion tube (1) is based on the target channel form of the patient after postnaris locking operation, the CT scanning layer thickness is less than or equal to 0.625mm, the three-dimensional reconstruction adopts medical image processing software for data segmentation and model construction, the conical profile, the diameter variation trend and the length dimension of the expansion tube (1) are completely attached to the anatomical curved surface of the inner side wall of the patient's postnasal cavity, the uniform distribution of expansion force is ensured, and the risk of local compression of mucous membrane is avoided.
  3. 3. The device for closing the nostril after congenital treatment based on the 3D printing technology according to claim 1, wherein the expansion tube (1) is made of medical liquid silica gel material, is integrally formed by a 3D printing and pouring method, the forming process comprises the steps of printing a resin mold based on an optimized three-dimensional model, injecting medical liquid silica gel subjected to vacuum defoaming into a mold cavity, curing for 2-3 hours in a 60+/-5 ℃ incubator, carrying out surface finishing after demolding, wherein the taper of a conical structure is matched with the rear nasal cavity of a patient, the length is adapted according to the age of the patient, the infant is 8-10mm, the child before school age is 10-12mm, the hollow inner diameter is 3-5mm, and a hollow channel penetrates through two ends of the expansion block, so that the smoothness of the normal respiratory airway of the patient is not affected while the expansion support is ensured, and the hypoxia risk is avoided.
  4. 4. The device for treating congenital postnaris locking based on the 3D printing technology according to claim 1, wherein the drug coating on the outer wall of the expansion tube (1) is prepared by adopting a spray coating and low-temperature curing process, the drug component takes mometasone furoate as a core and medical grade glycerol as a slow release carrier, the thickness of the coating is precisely controlled to be 0.1-0.2mm, the expansion tube (1) and the surface of the coating are firmly combined through medical grade alpha-cyanoacrylate adhesive to form a uniform micropore slow release structure, the drug can be continuously released and acts on the mucous membrane of the postnaris, the scar and granulation tissue hyperplasia are effectively inhibited, the duration of action is more than or equal to 28 days, and the device is not required to be replaced frequently.
  5. 5. The device for locking the nostril after congenital treatment based on the 3D printing technology, which is characterized in that the connecting belt (2) is made of medical elastic silica gel and integrally formed with the expansion tube (1) through a 3D printing perfusion method, a joint is free of a splicing gap, the structure strength is high, the specification parameters of the connecting belt (2) are 2-3mm in width and 0.5-0.8mm in thickness, the tensile modulus is 1.5-2.0MPa, the tensile deformation rate is less than or equal to 30%, the self-adaptive stretching along with the small change of the nasal cavity morphology is ensured when a patient crys, swallows and other activities, the mucous membrane is not loosened or pressed, and the connecting belt (2) is fixed by bypassing a small nasal pillar and is adapted to different facial contours.
  6. 6. The device for locking the congenital naris based on the 3D printing technology is characterized in that the needle type buckle (3) is formed by a male buckle and a female buckle and is formed by injection molding of medical hard silica gel materials, the male buckle of the needle type buckle (3) is of a needle-shaped protruding structure, the female buckle of the needle type buckle (3) is of a groove structure with elastic claws, the male buckle and the female buckle of the needle type buckle (3) are respectively fixed at the free ends of the two connecting bands (2) through medical silica gel adhesives, the needle type buckle (3) is firmly connected through interference fit, external force generated by movement of a patient can be effectively resisted, accidental falling is prevented, the structure of the needle type buckle (3) is designed to be detached in a pressing mode, a special tool is not needed, and medical staff can separate the male buckle from the two sides of the female buckle by pressing, and the operation is convenient.
  7. 7. The device for treating congenital naris locking based on the 3D printing technology, as claimed in claim 1, is characterized in that the conical top end of the expansion tube (1) is of a smooth spherical structure, the curvature radius is more than or equal to 2mm, the transition edges of the conical side wall, the top end and the bottom end of the expansion block (1) are rounded, the radius of the rounded corner is more than or equal to 0.5mm, the whole surface of the expansion block (1) is subjected to plasma polishing treatment, the surface roughness Ra is less than or equal to 0.2 mu m, no sharp protrusions or burrs exist, mechanical friction and compression damage to mucous membranes of the rear nasal cavity are reduced to the greatest extent, and wearing tolerance of patients is improved.
  8. 8. The device for treating congenital naris locking based on 3D printing technology of claim 1, wherein the elastic material of the connecting belt (2) has good anti-fatigue performance and ensures structural stability of long-term wearing.

Description

Naris blocking device after congenital based on 3D printing technology Technical Field The invention relates to the technical field of medical equipment, in particular to a device for locking a nostril after congenital treatment based on a 3D printing technology. Background The congenital posterior naris occlusion is a relatively rare nasal deformity in children, and has the core pathological characteristics that after fetal embryo development stage, the naris area fails to normally form a clear channel and is blocked by bone and membranous tissues, so that the clinical problems of dyspnea, feeding difficulty, repeated nasal sinus infection and the like of newborns or infants are caused, and the growth and development and life health of the infants are seriously affected. At present, the core means for clinically treating congenital posterior naris occlusion is low-temperature plasma radio frequency ablation, and occlusion tissues are removed in a minimally invasive mode to reconstruct posterior naris channels; In order to reduce the occurrence rate of postoperative re-locking, mainly rely on a posterior naris expansion tube or a support, but the products have no universal standardized size, and do not consider the individual differences of nasal anatomy forms of different infants, such as nasal cavity length, posterior naris diameter and inner side wall outline, the aim of supporting too strong pressing mucous membrane or supporting inadequately and not achieving expansion is easily achieved, the fixed structure of the device is mainly fixed by silk threads, actions such as crying, moving, swallowing and the like of an infant easily cause loosening, shifting and even falling of the device, not only the supporting effect is influenced, but also the falling device can possibly cause the risk of airway foreign matters, and in order to solve the problem, the invention provides a device for treating congenital posterior naris locking based on a 3D printing technology. Disclosure of Invention Aiming at the problems in the prior art, the invention provides a device for treating congenital posterior naris locking based on a 3D printing technology. The technical scheme adopted for solving the technical problems is that the device for locking the rear nostril for treating congenital based on the 3D printing technology comprises a rear nostril expansion tube, a connecting belt and a needle buckle, wherein the expansion tube is of a symmetrical structure and is internally hollow and integrally arranged in a conical shape, the outer layer of the rear nostril expansion tube is coated with a medical-grade technical drug coating, and the drug coating is used for inhibiting scar and granulation proliferation, realizing expansion of a nasal passage after a rear nostril shaping operation and preventing the rear nostril from being locked again; The utility model discloses a nasal cavity automatic correction device, including connecting band, expansion pipe, trigger and template, the expansion pipe is close to nasal septum one side and the one end fixed connection of connecting band, the connecting band left side end is furnished with the pin, the connecting band right side end is furnished with the box, the pin of connecting band left side end is walked around the nose post and is connected with the box in the right side nasal cavity for avoid the device to shift in the nasal cavity, drop, the connecting band realizes dismantling the connection and whole length design has the difference to different patient measurement data through the cooperation of pin and box, the expansion pipe adopts 3D to print the customized preparation of perfusion method, need scan patient nasal cavity and rear nostril region through high resolution CT before the preparation, obtains complete anatomical structure data, generates the printing model after three-dimensional reconstruction and optimal design, ensures the expansion pipe is accurate adaptation with patient's rear nasal cavity anatomical form, solves the poor problem of traditional standardized device suitability. Specifically, the personalized design of the expansion tube is based on the target channel form after the nostril locking operation after a patient, the CT scanning layer thickness is less than or equal to 0.625mm, the three-dimensional reconstruction adopts medical image processing software to carry out data segmentation and model construction, the conical profile, the diameter change trend and the length dimension of the expansion tube are completely attached to the anatomical curved surface of the inner side wall of the nasal cavity after the patient, the uniform distribution of expansion force is ensured, and the risk of local compression of mucous membrane is avoided. Specifically, the expansion tube is made of medical-grade liquid silica gel material, and is integrally formed through a 3D printing and pouring method, the forming process comprises the steps of printing a resi