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A light-cured hydrogel delivery device and in-situ printing method for minimally invasive surgery

A technology of minimally invasive surgery and delivery devices, applied in the direction of fixers, etc., can solve problems such as wound infection, uneven curing, and increased difficulty in personnel operation

Active Publication Date: 2020-10-27
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The one-time injection centralized curing method has the problem of uneven curing; and one-time injection molding can only meet the needs of a single material; for narrow parts and joints that are inconvenient to move, it is difficult for light-cured materials to reach the defect; the wound is exposed to light for a long time It is easy to increase the risk of wound infection; the use of a variety of auxiliary equipment increases the difficulty of personnel operation and easily leads to cross-contamination

Method used

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  • A light-cured hydrogel delivery device and in-situ printing method for minimally invasive surgery
  • A light-cured hydrogel delivery device and in-situ printing method for minimally invasive surgery
  • A light-cured hydrogel delivery device and in-situ printing method for minimally invasive surgery

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Embodiment

[0058] Such as Image 6 As shown, the light-cured hydrogel delivery device and in situ printing method for minimally invasive surgery were placed on the table, and the initial posture was determined and fixed by a tripod. 10% modified light-cured gelatin was used for the outer ring, and 5% sodium alginate mixed solution was used as the photosensitive material for the inner ring, and 0.5% 1173 was used as the photoinitiator. Use 5cc dispensing syringe and syringe pump as the feeding device, connect the syringe with the material delivery port of the device with a hose with Luer male and female, choose 375nm ultraviolet laser and lighting fiber as the light source, Set the extrusion speed to 0.01ml / s, and the light source intensity to 30mw / cm 2 . Use SLA technology to print a block with a hole with a diameter of 5mm and a depth of 5mm as the defect model to be repaired. Adjust the position of the coaxial nozzle through the handle so that the outlet and the axis of the defect ar...

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Abstract

The invention discloses a photo-cured hydrogel conveying device for minimally invasive surgery and an in-situ printing method. The device comprises a shell, a rotary steering structure and a coaxial spraying nozzle, wherein the rotary steering structure and the coaxial spraying nozzle are installed in the shell, the coaxial spraying nozzle is installed in the shell, and the outlet of the coaxial spraying nozzle is located outside. The posture is changed and adjusted through the transmission of an internal bevel gear group, the rotation of a handle around the Y axis is converted into the rotation of the coaxial spraying nozzle around the X axis, and the rotating range of the coaxial spraying nozzle is 0-180 degrees. The posture is indicated by scale lines on the outer handle, the rotating angle of the handle is indicated by the outer circle, and the rotating angle of the coaxial spraying nozzle at the tail end is indicated by the inner circle. The coaxial spraying nozzle is in a round tube shape. The outlet of the coaxial spraying nozzle is located on the longitudinal axis of a round tube. An embedded curing light source is adopted for one part of the coaxial spraying nozzle. The outer circle of the coaxial spraying nozzle has a material outlet effect and a light shielding effect. Illumination light sources are evenly distributed on the periphery of the coaxial spraying nozzle.By means of the continuous illumination and interval feeding segmented curing strategy, the material curing uniformity is ensured, and efficiency is improved.

Description

technical field [0001] The invention belongs to the field of light-curing material molding and surgical instruments, and in particular relates to a light-curing hydrogel delivery device and an in-situ printing method for minimally invasive surgery. Background technique [0002] Cartilage defects caused by articular cartilage lesions or trauma are very common. At present, microfracture surgery is a fast and effective treatment for knee articular cartilage repair. Usually, with the aid of arthroscopy, the doctor removes the cartilage lesion or defect and drills holes in the bone. There are two methods to form repair tissue. One is to use the patient's self-healing ability to coagulate bone marrow mesenchymal stem cells and blood at the opening to slowly form repair tissue; the other is to use tissue engineering technology to directly inject biomaterials containing growth factors or Implanting tissue engineering scaffolds to create an environment conducive to the growth of ste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/88
CPCA61B17/8825
Inventor 连芩顾恒李涤尘王慧超赵廷泽何晓宁
Owner XI AN JIAOTONG UNIV
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