Objective To investigate the effct of continuous blood purification(CBP)on endotoxin receptor and signal transduction of patients with multiple organ dysfunction syndrome(MODS).Methods Thirty patients with MODS were selected and treated with low volume and high volume haemofiltration.Plasma level of TNF-?、IL-6 were messured before and after CBP at 6h,1d,3d.Express of PMN CD14mRNA,CD14 protein and activity of NF-?B were also observed.Results CBP had no effect on TNF-?,and plasma IL-6 decreased significantly(P

Surgical robot is the national strategic diagnostic and therapeutic equipment research focus,get a number of scientific research institutes,colleges and universities and enterprises pay extensive attention to the design and development of a variety of surgical robots,and registration declaration.This article explores the critical technologies of surgical robots and key areas for optimizing their performance,including kinematic positioning errors,pose errors,feedback model errors,image recognition positioning errors,path planning,and safety aspects.The findings not only provide a scientific basis for future standardization research on surgical robots but also offer significant theoretical and practical references for the research,manufacturing,and registration processes in the medical robotics industry.

Objective·To verify the accuracy and clinical feasibility of fluoroscopic stereophotogrammetric analysis(FSA)technology based on two dimension(2D)-three dimension(3D)registration for early migration detection of aseptic loosening of joint prostheses.Methods·2D-3D registration algorithms centering on the light source and projected object respectively in FSA technology were verified under various working conditions through image synthesis experiments,and the feasibility of clinical application was verified through real model experiments.The image synthesis experiment established a perspective projection environment with the same parameters as the real environment in a virtual environment,the 2D perspective images of the 3D model(bone or prosthesis)during the six degrees of freedom transformation were recorded,and the six degrees of freedom transformation of the 3D model was restored by using different 2D-3D registration algorithms.The error of each registration algorithm was calculated.For real model validation,the migration between bone and prosthesis after joint replacement surgery was simulated with a high precision bone prosthesis migration simulator.The 3D model of the bone or prosthesis was reconstructed by using computed tomograph(CT)images and optical scanning,and the 2D perspective images before and after prosthesis migration were captured by using a fluoroscopy device.The migration of the prosthesis was restored by using FSA technology based on 2D-3D registration,and the error of FSA technology was calculated.Results·The accuracy of the 2D-3D registration algorithm centering on the light source was higher than that of the algorithm centering on the projected object under different working conditions.When the initial registration conditions were favorable,the algorithm centering on the light source reduced the rotation error compared to the algorithm centering on the projected object,with a statistical difference(P=0.021),and the displacement error decreases,with a significant statistical difference(P=0.000).Moreover,algorithms centering on the light sources required lower similarity and fewer registration times to meet clinical application requirements.Conclusion·The accuracy of FSA technology based on 2D-3D registration in early migration detection of artificial joint prostheses meets clinical application requirements.This technology can warn of late aseptic loosening of prostheses by detecting early migration of prostheses after joint replacement surgery,and is expected to be applied to clinical practice through further research.