ABSTRACT
Objective To prevent the medical personnel from infection during aeromedical evacuation of fulminating respiratory infectious disease patients by exploring the changes of differential pressure between those in and out of the negative-pressure isolation capsule and analyzing the stability of the capsule during aeromedical evacuation.Methods A differential pressure monitor developed by Institute of Medical Equipment was used for real-time recording of the changes the differential pressure in and out of the capsule during five flight phases of the aircraft,and the safety of the capsule during aeromedical evacuation and corresponding considerations were investigated.Results The maximum and minimum values of the negative pressure in the capsule were-60 Pa and-120 Pa respectively during aeromedical evacuation,which were all less than the safety threshold-15 Pa.The negative pressure was is directly proportional to the flying altitude.Conclusion The capsule keeps negative pressure effectively during flight,and thus facilitates patient aeromedial evacuation greatly.
ABSTRACT
The China Mechanical Virtual Human (CMVH) is a human musculoskeletal biomechanical simulation platform based on China Visible Human slice images; it has great realistic application significance. In this paper is introduced the construction method of CMVH 3D models. Then a simulation system solution based on Creator/Vega is put forward for the complex and gigantic data characteristics of the 3D models. At last, combined with MFC technology, the CMVH simulation system is developed and a running simulation scene is given. This paper provides a new way for the virtual reality application of CMVH.
Subject(s)
Humans , Algorithms , Anatomy, Cross-Sectional , Biomechanical Phenomena , China , Computer Graphics , Computer Simulation , Imaging, Three-Dimensional , Methods , Models, Biological , Muscle, Skeletal , Physiology , Software , User-Computer Interface , Visible Human ProjectsABSTRACT
Cardiopulmonary resuscitation (CPR) is vital for cardio arrest victims; in this field, researches have been aiming at its mechanism, operation guidelines, new CPR machines and so on. This paper summarized the studies on the mechanical characteristics of the thorax under CPR, and on the simulation work of sternal-displacement relationship in CPR manikins. The data from modeling work showed that the thorax's sternal-displacement relationship could be graphically represented by a hysteresis curve. As the actual CPR manikins' mechanical structures of the thorax are too simplified, it is necessary to do the work of improvement.
Subject(s)
Humans , Cardiopulmonary Resuscitation , Computer Simulation , Heart Arrest , Therapeutics , Heart Massage , Manikins , Physical Stimulation , Methods , Stress, Mechanical , Teaching Materials , Thorax , PhysiologyABSTRACT
Objective To research and construct dynamic electrocardiograph (ECG) simulation model/algorithm to simulate different kinds of clinical ECG,where the heart rate can be infinitely variable,and to develop one platform for fast-demo and analysis of theoretical wave based on this algorithm which can be implemented in ECG training and teaching. Methods According to different characteristics decoupled one complete ECG wave to 4 parts,including P-wave,PR-section,QT -wave and TP -section. P -wave and QT -wave database were set up accordingly to find the relationship algorithm between PR-section and heart rate,TP-section and heart rate. With the synthesis work of the algorithm and clinical diagnosis theory,ECG simulation mathematical model /algorithm,dynamic link library.(dll) and software interface were developed by C++. Results Through comparing the ECG simulation results with clinical samples,the veracity and validity of the mathematical model/algorithm was verified. Conclusion The software module based on this model/algorithm is very valuable for ECG training and teaching in clinic,and can be implemented in the development of more advanced ECG relative software and devices.
ABSTRACT
Objective To design a virtual console for the movable high frequency X-ray machine system type MME2002. Methods An experimental circuit was designed to simulate the real circuit and realized the serial communication between microcomputer and MCU (micro control unit). The simulating software was designed in Visual Basic 6.0, using MSComm to control serial communication. It simulated the functions of the initial console, including setting parameters, sending commands to the machine and storing and transferring the best data of a special condition by file operation in VB. Results The console was designed based on PC. Conclusion This console can replace the console using circuit boards and keys. It can be combined with the X-ray machine systems' image collection software, making the machine's operation more easy and convenient.