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.

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.

Objectives:To study the clinicopathological features of extraovarian peritoneal serous papillary carcinoma.Methods:The clinical pictures and pathological characteristics of 6 cases extraovarian peritoneal serous papillary carcinoma admitted to our hospital from 1992 to 1999 were studies retrospectively.H & E staining,histochemical staining and immunohistochemical staining were used.Results:The ages of the 6 patients were between 32～62(43.7) years old.The bilateral ovaries and fallopian tubes were almost normal.Tumors were examined histomorphologically by microscope and electron microscope,periodic acid-Schiff (PAS) stain was used in the histochemical study and carcinoembryonic antigen (CEA),CA125,p53,AE1 and AE3 monoclonal antibody assays were detected immunohistochemically.The results revealed no difference between extraovarian peritoneal serous papillary carcinoma and ovarian serous papillary carcinoma.Conclusions:Extraovarian peritoneal serous papillary carcinoma is considered arising from the secondary Müllerian system.Histologically,extraovarian peritoneal serous papillary carcinoma was identical to that of the similar epithelial carcinomas arising from the ovaries.The diagnosis was made only when the ovaries were not involved and without any evidence of similar epithelial carcinoma obtained in the ovaries.Histochemical staining and immunohistochemical staining are helpful as accessory criteria for the differential diagnosis between primary carcinoma of the peritoneum and malignant mesothelioma.The prognosis is poor.

BACKGROUND:Myocardial and coronary endothelial injury occurs in donor hearts due to warm ischemia during cardiac transplantation. Coronary endothelial structure and function play a critical role in long-term outcomes for patients after cardiac transplantation. OBJECTIVE:To study the effect of hypoxia-induced warm ischemia (20 minutes) on coronary endothelial function of porcine donor hearts after cardiac death (DCD). METHODS:Sixteen healthy Swedish domestic pigs were randomized into control (n=6), DCD (n=5), and DCD plus cold storage (n=5) groups, respectively. A DCD model in pigs was established using the method of hypoxia-induced 20-minute warm ischemia in the DCD and DCD plus cold storage groups. Isolation of the heart left anterior descending coronary artery or combined with heart preservation pretreatment for 4 hours was performed in the DCD and DCD plus cold storage groups. The maximum coronary endothelium-dependent relaxation was determined in the three groups. RESULTS AND CONCLUSION:There were no significant differences in the maximum coronary endothelium-dependent relaxation and the minus logarithmic of substance concentration induced 50%maximal relaxation among three groups (P>0.05). These results indicate that 20-minute warm ischemia cannot lead to obvious coronary endothelial dysfunction. In addition, DCD combined with 4-hour cold storage does not affect coronary endothelial function.

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.

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.
Cardiopulmonary Resuscitation ; Computer Simulation ; Heart Arrest ; etiology ; therapy ; Heart Massage ; Humans ; Manikins ; Physical Stimulation ; methods ; Stress, Mechanical ; Teaching Materials ; Thorax ; physiology

Objective:To evaluate the curative effect of arthroscopic long head of biceps tendon (LHBT) transfer to reconstruct shoulder superior capsule for repairing massive rotator cuff tears.Methods:A retrospective case-control study was conducted on clinical data of 64 patients with massive rotator cuff tears admitted to Shanghai Tenth People's Hospital of Tongji University between December 2017 to January 2019. There were 26 males and 38 females, with the age of 50-75 years [(62.5±4.8)years]. All patients were treated by arthroscopic superior capsular reconstruction with LHBT. The shoulder range of motion in flexion, abduction, external rotation, acromiohumeral distance, visual analogue scale (VAS), Constant-Murley score and American Shoulder and Elbow Surgeons (ASES) score were evaluated and recorded before operation and at the last follow-up. The MRI was used to evaluate the integrity of the reconstructed structure at the last follow-up and rotator cuff re-tear rate. Postoperative complications were detected.Results:All patients were followed up for 13-25 months [(18.2±4.3)months]. At the last follow-up, the shoulder range of motion was (149.5±7.8)° in flexion, (162.0±6.6)° in abduction, and (60.6±11.8)° in external rotation; the acromiohumeral distance was (7.4±0.6)cm, the VAS was 1.0(0.0, 1.0)points, the Constant-Murley score was (90.5±2.6)points, the ASES was (90.8±4.2)points, which were significantly improved compared with those before operation [flextion: (73.8±5.3)°, abduction: (85.8±5.5)°, external rotation: (34.3±5.8)°, acromiohumeral distance: (5.9±0.8)cm, VAS: 6.5(6.0, 7.0)points, Constant-Murley score: (41.8±5.4)points, ASES: (41.4±6.1)points, respectively]( P<0.01). of all, 56 patients had intact reconstruction structure at the last follow-up, 7 patient with smalll retears in the reconstruction were not revised, and 1 patient underwent revision operation after reconstruction failure. The retear rate after rotator cuff repair was 13% (8/64). There were no obvious surgical complications after operation, with the incision free from infection. Conclusion:Arthroscopic superior capsular reconstruction with LHBT for repairing massive rotator cuff is safe and reliable, which can effectively relieve the pain of shoulder joint, recover the function and improve the joint mobility.

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.
Algorithms ; Anatomy, Cross-Sectional ; Biomechanical Phenomena ; China ; Computer Graphics ; Computer Simulation ; Humans ; Imaging, Three-Dimensional ; methods ; Models, Biological ; Muscle, Skeletal ; anatomy & histology ; physiology ; Software ; User-Computer Interface ; Visible Human Projects

Post-traumatic hydrocephalus (PTH) is one of the common secondary lesions after severe craniocerebral injury.Shunt surgery is the most important surgical treatment in clinic.There are many kinds of shunt methods,but there is no uniform standard for method selection.Lumboperitoneal shunt (LP),as an important alternative operation,has gradually become one of the mainstream shunt operations.This article reviews the new operative indications of LP,the advantages of LP over traditional ventriculoperitoneal shunt (VP),the latest preoperative evaluation system and preoperative evaluation score of Huaxi LP,the technical points of LP operation,follow-up key points,common postoperative complications and management,so as to provide reference for exploring better technical routes and operative concepts of LP.

ObjectiveTo investigate the effect of macrophages (MCs) on the differentiation of mouse induced pluripotent stem cells (iPSCs) into hepatic progenitor cells (HPCs). MethodsA total of 24 C57BL/6N mice were used to obtain MCs by peritoneal irrigation, and the supernatant was collected to obtain the conditioned medium of MCs (MC-CDM). Activin A, bone morphogenetic protein 4, and fibroblast growth factor were used to induce the differentiation of mouse iPSCs into HPCs. The differentiation of HPCs were randomly divided into control group (normal medium) and experimental group (MC group; use of MC-CDM medium on day 5 of induction). Morphology, immunofluorescence assay, and Western blot were used to compare the morphology of HPCs and the expression of related proteins between the control group and the MC group. The t-test was used for comparison of continuous data between two groups. ResultsHPCs derived from iPSCs were established in vitro, and HPCs had the potential to differentiate into hepatocytes. Immunofluorescence assay showed that compared with the D12 control group, the D12 MC group had a significant increase in the protein expression of the HPC-specific protein CK19 (0.901±0.072 vs 0.686±0.097, t=-3.093, P＜0.05). Western blot showed that compared with the D12 control group, the D12 MC group had a significant increase in the protein expression of the HPC-related protein CK19 (1.922±0.103 vs 1.448±0.012, t =-7.881, P ＜005), as well as a significant increase in the protein expression of the autophagy-related protein LC3 (1.392±0.042 vs 1.101±0048, t =-5.978, P＜005). ConclusionMCs can promote the differentiation of mouse iPSCs into HPCs, possibly by increasing the autophagy level of HPCs.