Methods for preparing cutting guide plates and determining cut soft tissue substituting flap volume by using digital space reconstruction and 3D printing technology

Abstract

The invention relates to the medical science field, and discloses methods for preparing cutting guide plates and determining a cut soft tissue substituting flap volume by using a digital space reconstruction and 3D printing technology. The method includes the following steps: 1) building a three-dimensional model through CT scanning; 2) determining an excision lesion area, and extracting a repaircurved surface; 3) converting the curved surface into a plane; and 4) preparing a cutting guide plate through 3D printing. Substituting flap can be accurately cut in a donor site by using the cuttingguide plate. The method for determining the substituting flap volume includes the following steps: a) building a three-dimensional model through the CT scanning; b) determining an excision lesion area, and calculating the volume of an excision part; c) adding and soaking the substituting flap in a harmless liquid to calculate volume increment; and d) performing trimming on the subcutaneous soft tissue of the substituting flap so that an exact volume can be obtained. The volume of soft tissue defect prosthesis also needs digital assessment. The accurate assessment of the substituting flap volume can make the appearance of the prosthesis plim after surgery.

Description

technical field [0001] The invention relates to the field of medical treatment, in particular to a method for preparing a cutting guide plate and determining the volume of cut soft tissue instead of a skin flap by using digital space reconstruction and 3D printing technology. Background technique [0002] After tumor resection, the space left by the resected soft tissue needs to be filled and repaired, and repairing complex soft tissue defects is extremely challenging for surgeons. Currently, the main methods for repairing soft tissue defects include pedicled flaps, free flaps, and artificial substitutes. At present, it is required to retain more functional peripheral soft tissue under the premise of safe tumor resection margins, and try to restore the shape, function and tissue volume of the reconstructed organs as much as possible. At the same time, there is often a lack of precise preoperative design and intraoperative strain when faced with cases of large-area defects i...

AI Technical Summary

Problems solved by technology

Therefore, how to accurately determine the size of the cutting guide plate has become a technical problem (in the prior art, the cutting guide plate is generally not established by building a three-dimensional model, but the doctor’s personal experience is used to prepare the cutting guide plate and perform skin flap removal. Surgeons have high personal requirements, which is a challenge for inexperienced novices)

[0007] On the other hand, in the prior art, the repair of soft tissue defects generally only focuses on the repair of the surface layer, but does not focus on the repair of subcutaneous soft tissue vacancies.

If the resection surface is absorbed without repairing the subcutaneous soft tissue, after the repair, the subcutaneous tissue of the transplanted flap is insufficient, resulting in the loss of subcutaneous tissue at the resection site, which will cause the surface skin to collapse and affect the appearance of the repair.

As we all know, the cutting guide can only determine the surface size of the replacement flap, but cannot determine the subcutaneous soft tissue volume of the cut flap. Since there are few reports on this aspect, how to quickly and accurately determine the theory of the replacement flap The required volume and the actual cut volume is a difficult problem

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