1.An Investigation on Cardiac Output and Regional Blood Flow with Radioactive Biologic Microsphere Technique in Rats
Journal of Third Military Medical University 1983;0(03):-
61Cr-labelled frog red blood cells are used to study the cardiac output and blood flow of organs in anesthetized adult rats.The results are generally consistent with those reported by other investigators.Lung flow (bronchial artery and vein shunt) and liver flow (hepatic artery and portal vein shunt) measured with this method are all lower than those obtained with carbonized micro-spheres.This result suggests that the biologic microsphere technique is superior to the carbonized microsphere technique.
2.Changes in the Contents of Water and Electrolytes in Cerebral Cortex of Rats at Simulated High Altitude of 6000m
Journal of Third Military Medical University 1983;0(04):-
Cerebral edema occurred in adult rats exposed to simulated high altitude of 6000m. Both sodium and water contents in cortex tissue of rats increased, which was a characteristic sign of cytotoxic brain edema. Our results support the hypothesis that acute mountain sickness results from cerebral edema because of high altitude hypoxia.
3.Effects of Different Hydration States and High Altitudes on Water Contents of the Lungs and Brain in Rats
Journal of Third Military Medical University 1984;0(02):-
When rats in different hydration states (normal control,furosemide treated,and water loaded) were exposed to hypoxia due to simulated altitudes from 5 000 to 8 000 meters,the water content of the lungs and brain was measured.It was found that the water loaded animals had an increase of the water content of the lungs and cerebral cortex under simulated high altitudes.The pulmonary extravascular water content was higher at an altitude of 5 000 meters than at an altitude of 8 000 meters.The increase of water content in the brain mainly happened to the cerebral cortex.The diuresis after the administration of furosemide could lower the water content of the lungs and brain in rats at high altitudes.The results listed above support the hypothesis that pulmonary edema may occur simultaneously with brain edema at high altitude,both of which are two important constituents of acute mountain sickness.
4.Experimental High-altitude pulmonary Edema of Rats
Shiqun LIU ; Jingsheng GAO ; Deqing LI ; Yingbo YANG ; Hui KOU
Journal of Third Military Medical University 1983;0(04):-
Adult albino rats were exposed to simulated high altitude of 5000 m for 72 hours. Mild degree of interstitial pulmonary edema was observed under light microscope. Rats with the left lung excised were subjected to hypoxice of the same degree for 48 hours. On histologic examinations interstitial edema of the right lung was more obvious than that of the previous group. In isolated alveolus or in small groups of alveoli, edematous fluid could he seen.There were perivascular and peribronchial "Cuffs". The former were supposedto be accumulation of edema fluid leaking from the capillaries at the level of alveoli. The latter might be the result of extension of perivascular fluid to the peribrochial space.Excision of the left lung may result in a rise in pulmonary arterial pressure and over perfusion in certain areas remaining lung. Hypoxia may intensify the above changes. Pulmonary hypertension and overperfusion may in force promote the genesis of pulmonary edema.
5.Changes of pulmonary Water Content in Experimental Animals During Early phase of Hypoxia
Shiqun LIU ; Jingsheng GAO ; Deqin LI ; Zhen PEI ; Li MA
Journal of Third Military Medical University 1984;0(02):-
This paper is to report our results of the observation on the changes of the pulmonary water content of the rats and mice after their exposure to a simulated altitude of 6000 meters above sea level for seven days.It was found that the changes of the pulmonary water content varied with the duration of exposing to the high altitude. It was lower than the control value on the first day of exposure, and then it increased approaching or even being a little higher than the control value on the second and third day. But it decreased and was below the control value again from the fourth day to the seventh day. The lung weight was increasing continuously in the same period.In addition, there were progressive increase of both the wet-lung/body and dry-lung/body indices, progressive decrease of left/right ventricles ratio, and gradual rising of hemoglobin in the animals studied.
6.Effect of Decreased plasma Colloid Osmotic pressure on Lung Water Content in Rats under simulated High Altitude
Shiqun LIU ; Jingsheng GAO ; Deqin LI ; Zhen PEI ; Li MA
Journal of Third Military Medical University 1983;0(04):-
Rats were made to bleed and about 40% of the total blood volume was lost. A replacement of Ringer's solution of the volume four times the lost blood volume was given and the animals were closely monitored for 24 hours. The hemoglobin level of the animals was low throughout the course of observation. The plasma colloid osmotic pressure reached the lowest point 15 minutes after bleeding, and then gradually rising up returned to a level about 90% of the control value at the end of 24 hours. The relativity between the plasma colloid osmotic pressure and the lung water content was quite significant in those rats in a low altitude environment (P0.05).The result indicates that the increased lung water content due to decreased plasma osmotic pressure could not be made further worse by hypoxia due to high altitude. The characteristic pulmonary hemodynamic changSs caused by hypoxia might be considered as the explanation of the phenomenon.
7.Maxillary first molar with a single buccal root
Xin YU ; Shiqun SUN ; Yuqi GAO ; Yuyan LIU
Journal of Practical Stomatology 2018;34(1):134-135
Maxillary first molar demonstrates considerable anatomic complexities and abnormalities with respect to the number of roots and root canals. The occurrence of maxillary first molar with a single buccal root is rarely reported in literature. This is a case report of maxillary first molar with a single buccal root and a palatal root,each of which has one canal.
8.Application and research progress of minimally invasive technique in pediatric cardiac surgery
Shiqun WU ; Shixiong WANG ; Zehui CAO ; Qiliang ZHANG ; Debin LIU
Chinese Journal of Thoracic and Cardiovascular Surgery 2023;39(7):428-435
With the continuous in-depth study of minimally invasive cardiac surgery(MICS), minimally invasive cardiac surgery in children has also been developed in this period, but there is still a certain gap compared with adults. Because of the large difference in body size and the low tolerance of surgery in children, minimally invasive cardiac surgery in children still has a short board on complex cardiac diseases. This article reviews several commonly used minimally invasive techniques: (1) small incision cardiac surgery; (2) thoracoscopic and robot-assisted cardiac surgery; (3) minimally invasive cardiopulmonary bypass(MiECC) and cardiac surgery to avoid cardiopulmonary bypass; (4) hybrid surgery and enhanced cardiac rehabilitation surgery(ERACS) in pediatric cardiac surgery and their application and research progress.
9.Open versus endovascular treatment of thoracoabdominal aortic aneurysms: parallel and controversia
Zehui CAO ; Qiliang ZHANG ; Shiqun WU ; Debin LIU
Chinese Journal of Thoracic and Cardiovascular Surgery 2023;39(10):634-640
Open surgery is currently the gold standard for the treatment of thoracoabdominal aortic aneurysm(TAAA), while endovascular aortic repair(EVAR) has also been widely carried out. Because it involves important branches supplying internal organs, the technical system for treating TAAA is particularly complex. However, with the advent of newer, low-cost, flexible stent systems, total endovascular repair techniques have become more feasible and attractive. For young and low-risk patients, the choice of open or endovascular treatment remains controversial. Despite the advantages of a minimally invasive procedure, EVAR carries a greater risk of spinal cord injury and may require secondary endovascular intervention to repair endoleak when its unique complication occurs, and the long-term durability after EVAR is not clear. This article reviews the open and endovascular treatment of TAAA, introduces the development of open surgery and endovascular repair, the advantages and disadvantages of various types of stents, and discusses how to select a more suitable surgical method for patients, providing clinicians with a treatment reference.
10.Mediating effect of children's effortful control between home environment and emotional behavioral problems among preschool children with malignant tumors
Xiaorong PAN ; Lin MO ; Qian LIU ; Xianqiao HUANG ; Shiqun ZHANG ; Xiaoli GUO
Chinese Journal of Behavioral Medicine and Brain Science 2020;29(7):629-634
Objective:To explore the mediating effect of children's effortful control on the relationship between home environment and children's behavioral emotional problems in preschool children with malignant tumors and to provide evidences for family intervention on behavioral emotional problems in children.Methods:Totally 353 preschool children with malignant tumors were investigated with family adaptation and cohesion evaluation scales II (FACES II), child behavior questionnaire-very short form(CBQ-VSF) and strengths and difficulties questionnaire (SDQ), AMOS 22.0 software was used to construct a structural equation model in data analysis and the Bootstrap method was used to test the mediation effect.Results:The scores of family adaptation and cohesion, children's effortful control, difficulty questionnaire were(51.63±12.41), (55.43±10.16), (3.23±0.80) and (13.75±3.66). The scores of dimensions including emotion, conduct, hyperactivity, peer problems, prosocial of difficulty questionnaire were(2.83±0.90), (2.73±0.96), (2.67±0.93), (2.76±0.85), (2.67±0.85), respectively. Family adaptation and cohesion were positively correlated with children's effortful control ( r=0.244, 0.289, P<0.01). Children's effortful control was negatively correlated with children's behavioral emotional problems ( r=-0.365--0.302, all P<0.05). Family adaptation and cohesion were negatively correlated with children's behavioral/emotional problems ( r=-0.323--0.124, r=-0.342--0.181, all P<0.05). The direct effect value was -0.469, indirect effect value was -0.102, accounting for 17.86% of the total effect. Conclusion:Children's effortful control exert a significant mediating effect on the relationship between home environment and children's behavioral/emotional problems in preschool children with malignant tumors, suggesting that medical staff should pay attention to the level of effortful control of preschool children with malignant tumors in order to take effective actions to reduce children's behavioral/emotional problems and improve social applicability.