Skin in-situ printing equipment

Abstract

The invention provides skin in-situ printing equipment, which is used for coating biological glue and a cross-linking agent on a preset part of a patient, and is characterized by comprising a platformdevice, a printing head device, a coating power device, a three-axis moving device and a control device, wherein the platform device is used for bearing and transporting a patient; the printing headdevice is used for coating biological glue and a cross-linking agent on a preset part and is provided with a support unit and a sprayer unit arranged on the support unit; the coating power device is used for extruding the biological glue and the cross-linking agent out of the sprayer unit during coating; the three-axis moving device is used for driving the printing head device to move to the preset part; the control device is used for controlling the above devices; the sprayer unit is provided with a first sprayer assembly comprising a first barrel and a first needle head, and a second sprayerassembly comprising a second barrel and a second needle head; the second barrel and the second needle head surround the first barrel and the first needle head respectively and are provided with a first gap and a second gap; the first gap is communicated with the second gap; and the lower end of the second needle head is lower than the lower end of the first needle head.

Description

technical field [0001] The invention belongs to the field of medical equipment, and relates to a skin in-situ printing equipment. Background technique [0002] Skin defect refers to the loss of skin caused by burns, mechanical damage and other reasons. If the damage depth of the skin defect reaches the dermis and below, the human body cannot fully regenerate, but heals through fibroblast growth and other methods, and scar tissue is formed in the defect after healing. The color and shape of scar tissue and normal skin are quite different, which is extremely unsightly, so it is easy to bring psychological burden to patients; not only that, scar tissue has poor elasticity, lack of pores, and poor air permeability, which is also easy to cause discomfort to patients feel. Therefore, when treating skin defects, try to allow the skin to heal normally and avoid scar tissue. [0003] Clinically, stretching the skin around the damaged part or transplanting skin from other parts is ...

AI Technical Summary

Problems solved by technology

However, such a method requires that the coating speed must be very fast, otherwise the remaining bio-glue will solidify and cannot continue to coat; Multiple mixing and coatings are required, which is not only tedious and laborious, but also increases the risk of contamination of the skin layer cells in the bioglue

[0005] If the bio-glue and cross-linking agent are coated separately, the bio-glue will be exposed to light and air in advance, which increases the risk of contamination of the skin layer cells in the bio-glue. The mixing degree of the joint agent is also difficult to grasp

[0006] Therefore, how to achieve the mixing and coating of bioglue and cross-linking agent becomes the key to successfully printing skin, and the existing technology can not solve this key problem well.

[0007] In addition, it is difficult to accurately control the direction of coating in the existing technology, so the printing accuracy is also very low

[0008] In addition, the position and angle of the damaged part of the patient are different, and the nozzle needs to maintain a certain angle with the surface of the human body to ensure the coating effect. Therefore, the patient must keep sideways, turn over or Lying down and other movements, on the one hand, these movements cannot accurately meet the requirements of the coating angle, making the coating accuracy not high enough; on the other hand, it is difficult for the patient to keep the sideways or turning movements unchanged. Changes will seriously affect the accuracy of coating; if the patient is fixed sideways or turned over before coating, although the patient's posture can be kept unchanged, the patient will feel very uncomfortable, which is not conducive to treatment

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