1.The Roentgenologic Evaluation of the Amount of Lipiodol Deposition and the Therapeutic Effect by Lipiodol Embolization in Liver Cancer
Journal of Interventional Radiology 1992;0(01):-
The relation between the amount of lipiodol deposition by intrahepatie arterial lipiodol embolization together with perfusion of chemotherapeutic agents and the efficacy of the therapy was evaluated in 90 cases of liver cancer. Resulting in 3 groups: 1 abundant, 2 moduate and 3 mild. There were prominent differences between group 1 and 2, but only slight differences for group 2 and 3 according to the rates of AFP lowering, turner shrinkage and 1 year survial. Thus the obvious high therapeutic efficacy was proportional to the amount of lipiodol deposition. The factors influencing the deposition of lipiodol was also discussed.
2.The effect of TACE plus PSE on the liver function of hepatic cancer with portal hypertension and hypersplenism
Zhenglong TAO ; Yongde CHEN ; Hongxian JIN
Journal of Interventional Radiology 1994;0(04):-
0.05) but remarkable change after therapy was shown at one week later (P
3.Magnetic field numerical calculation and analysis for magnetic coupling of centrifugal blood pump for extracorporeal circulation.
Zhaoyan HU ; Lijun LU ; Tianyi ZHANG ; Zhenglong CHEN ; Tao ZHANG
Journal of Biomedical Engineering 2013;30(6):1244-1249
This paper mainly studies the driving system of centrifugal blood pump for extracorporeal circulation, with the core being disc magnetic coupling. Structure parameters of disc magnetic coupling are related to the ability of transferring magnetic torque. Therefore, it is necessary to carry out disc magnetic coupling permanent magnet pole number (n), air gap length (L(g)), permanent magnet thickness (L(m)), permanent magnet body inside diameter (R(i)) and outside diameter (R(o)), etc. thoroughly. This paper adopts the three-dimensional static magnetic field edge element method of Ansys for numerical calculation, and analyses the relations of magnetic coupling each parameter to transmission magnetic torque. It provides a good theory basis and calculation method for further optimization of the disc magnetic coupling.
Extracorporeal Circulation
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Magnetic Fields
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Magnetics
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Torque
4.Control and testing methods for blood bump in heart assistant and replacement devices.
Tao ZHANG ; Zhaoyan HU ; Zhenglong CHEN ; Xiaobei HOU
Chinese Journal of Medical Instrumentation 2013;37(6):432-436
Using extracorporeal circulation for cardiopulmonary bypass is the first step for the successful cardiac surgery, and the blood pump is the key component in extracorporeal circulation devices, the control and measurement of mechanical-fluid parameters such as flow rate and pressure are very important to guarantee the successful cardiac surgery. This paper reviews several control methods of the blood pump based on the flow rate/pressure, heart rate, ventricular work and blood assist index, and also discusses the direct and indirect measurements of the flow rate and pressure. This review concludes with the main possible trends for the further development of the blood pump control and testing methods.
Equipment Design
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Extracorporeal Circulation
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instrumentation
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Heart-Assist Devices
5.THE USE OF 6-AMINOCAPROIC ACID (EACA) TO REDUCE POSTOPERATIVE BLEEDING FOLLOWING IN MITRAL VALVE REPLACEMENT
Zhenglong DU ; Zhusheng KUANG ; Rongsheng XIONG ; Zhigang WANG ; Yibo LIU ; Hongtao XIA ; Tao BAI ; Sheng DENG ; Fu ZHANG
Chinese Journal of Postgraduates of Medicine 2001;24(5):20-21
Objective To determine the effect of 6-aminocaproic acid (EACA) to reduce postoperation bleeding following in mitral valve replacement.Method 50 adult patients uddergoing mitral valve replacement was adopted a double-bisind randomized trial to be divided into two groups.Each group is 25 patients.The patients in control groups received NS,the ones in study groups received NS as same as control groups but added EACE 10 g by intravation.The bleeding amount in cavitas thoracis were recorded on the sixth,twenty-fourth postoperative hours and ACT was recorded as well.Results The bleeding amount in study groups on the sixth postoperative hours were (290.0±41.3) ml.On twenty-fourth postoperative hours were (336.3±81.3) ml.The bleeding amount in control groups on the sixth postoperative hours were (393.4±73.6) ml.On twenty-fourth postoperative hours were (450.0±79.6) ml.The bleeding amount in study groups were decreased significantly as compared with in control groups (P<0.05).Conclusion:6-aminocaproic acid can reduce postoperation bleeding following in mitral valve replacement.
6.Combined Use of CD Suicide Gene and Lymphotactin Gene Therapy Elicit Potent Antitumor Effects
Dasheng CHENG ; Xuetao CAO ; Dianwen JU ; Weiping ZHANG ; Jianli WANG ; Qun TAO ; Minghui ZHANG ; Xuejun ZHU ; Zhenglong YUAN
Chinese Journal of Cancer Biotherapy 1995;0(03):-
Adenovirus harboring E. coli. cytosine deaminase gene (AdCD) and adenovirus encoding with lymphotactin gene (AdLtn) were used for gene therapy in vivo. BALB/c mice were inoculated subcutaneously with CT26 colon adeno-carcinoma cells and 3 days later received combined injection of AdCD and/or AdLtn followed by continuous injection with 5-fluorocytosine(5-FC) 300mg/kg. The results demonstrated that mice received combined therapy developed tumors most slowly and survived longest when compared with mice treated with AdCD/5-FC, AdLtn, AdlacZ/5-FC or PBS. To further explain the immunological mechanism of the antitumor effects by the combined therapy, we found that combined treatment with suicide gene and Ltn gene therapy achieved maximal cytotoxic effects of nature killer cells and specific cy-totoxic T lymphocytes. FACS analysis of the tumor mass demonstrated that AdCD/5-FC in combination with AdLtn therapy increased the expression of H-2K~d and B7-1 expression on tumor cells. The CD4~+ and CD8~+ cells infiltrated in the tumor mass after combined therapy were significantly increased when measured by FACS analysis. Our results demonstrated that combined transfer of suicide gene and lymphotactin gene induce nonspecific and specific antitumor immunity of the host and elicit more potent antitumor effect.