ABSTRACT
3D printing technology has unique advantages and broad application prospect in biomedicine field. In recent years, cell printing, tissue printing, and organ printing technologies h have appeared successively, and drug printing and medical device printing have been realized. For complex surgical cases, surgeons and researchers have explored a surgical program that involves 3D printing technology, and completed many clinical applications including case discussions, surgical simulations and implantation surgeries. These efforts promoted the application and development of 3D printing technology in medical field. The purpose of this paper is to describe the application and research status of 3D printing technology in medical field from the aspects of medical teaching, orthopedic surgery, stomatology, bioprinting, drug printing, medical device manufacturing, etc., and put forward the prospects for future development.
ABSTRACT
Objective To study the generating algorithm of personalized external fixation model based on STL file, so as to realize the fabrication of personalized external fixation through 3D scanning, model generation and 3D printing. Compared with the traditional plaster fixation, the external fixation obtained by the proposed method has the advantages of good adhesion to the external surface of the limb, good gas permeability and light weight. Methods In order to generate a personalized external fixation model, the key generating algorithms of the model were studied. The point cloud file of the residual limb was obtained by a 3D scanner, and then was converted into an STL format file. The triangular patches were processed by cutting, offsetting, triangulating and hollowing to create an external fixation model with good gas permeability and conformable surface that is fully fitted with the body surface. Finally, the external fixation was fabricated by 3D printing. Results Using the improved point offset algorithm, the problem of severe distortion of the point offset at the plane and sharp corners was solved. Using the tangent sort method, the points on the contour ring were sorted clockwise to obtain a triangular profile. The hollowing of the model was achieved by using the typical three-dimensional "cutting tool" mathematical model and the STL file space intersection method. Conclusions The improved model generating algorithm was validated based on a wrist case, and the personalized external fixed fixation model with conformable surface was obtained. It is proved that the proposed model generating algorithm is effective and practical.
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@#ObjectiveTo investigate the nursing management of clean intermittent catheterization (CIC) of spinal cord injured (SCI) patients.Methods72 SCI patients were randomly divided into two groups: CIC group (37 cases) and sterile intermittent catheterization (SIC) group (35cases); urine cultures were performed before and after catheterization in each group, hand cultures were also performed before catheterization only in CIC group. Results10 cases of CIC group and 11 cases of SIC group had different results of urine culture before and after intermittent catheterization, but there was no statistical difference between two groups (P>0.05). 5 cases had positive results of hand culture, but the colony counting was in the normal range. Follow up was made six months after intermittent catheterization. There were 35 cases (94.59%) in CIC group and 33 cases (94.29%) in SIC group who could urinate regularly with post void residual less than 50 ml. One case in each group had symptomatic urinary tract infection respectively. ConclusionsCIC is a simple, safe and effective method to resolve the bladder dysfunction of SCI patients.
ABSTRACT
@#目的探讨对后期脊髓损伤患者实行康复教育的内容及方式。方法采取自行设计问卷 ,对在我院康复病房住院的72例脊髓损伤患者进行问卷调查。结果后期脊髓损伤患者需求的康复知识主要为康复训练指导、泌尿系统感染的预防、膀胱训练、安全护理、肠道护理(或上呼吸道感染的预防),对康复教育方式主要选择交谈、病友交流和实际操作。结论对后期脊髓损伤患者进行康复教育,应考虑患者的损伤部位、心理状态、教育方式等,要因人而异,内容具体,使康复教育达到最佳效果。