Objective To investigate the efficacy and safety of the Corheart 6 left ventricular assist system in patients with end-stage heart failure. Methods A retrospective study was conducted on patients with end-stage heart failure who were treated with Corheart 6 left ventricular assist system from March 2022 to June 2024 in 4 hospitals in Jiangsu Province. The efficacy of the device was evaluated by comparing changes in clinical indicators at preoperative, discharge, 3-month postoperative, and 6-month postoperative timepoints, including the New York Heart Association (NYHA) functional classification, left ventricular ejection fraction (LVEF), and left ventricular end-diastolic diameter (LVEDD). The safety of the device was assessed by analyzing the intraoperative position and orientation of the blood pump inlet cannula, as well as the incidence of adverse events. Results In this study, 39 patients were collected, including 34 males and 5 females with a mean age of (56.4±12.5) years, ranging from 20 to 75 years. There was no operative death. There was no death in postoperative 3 months with a survival rate of 100.0%. There were 3 deaths in 6 months postoperatively, with a survival rate of 92.3%. All patients had a preoperative NYHA cardiac function classification of class Ⅳ. The NYHA cardiac function class of the patients improved (P<0.05) at discharge, 3 and 6 months after surgery when compared to the preoperative period. LVEF was significantly higher at 3 months after surgery than that during the preoperative period (P<0.05). LVEDD was significantly smaller at discharge, 3 and 6 months after surgery than that during the preoperative period (P<0.05). The safety evaluation's findings demonstrated that all 39 patients' intraoperative blood pump inlet tubes were oriented correctly, the artificial blood vessel suture sites were appropriate, there were no instances of device malfunction or pump thrombosis, or instances of bleeding or hemolysis, and the rate of the remaining adverse events was low. Conclusion With a low rate of adverse events and an excellent safety profile, the Corheart 6 left ventricular assist system can efficiently enhance cardiac function in patients with end-stage heart failure. It also has considerable clinical uses.

Objective::Calcific aortic valve disease (CAVD) affects millions of elderly people, and there is currently no effective way to stop or slow down its progression. Therefore, exploring the pathogenesis of CAVD is very important for prevention and treatment. Cartilage oligomeric matrix protein (COMP) have important role in cell phenotype change. This study is aimed to confirm whether COMP participate in CAVD and try to find the possible mechanisms.Methods::Human aortic valve tissues from Nanjing First Hospital (CAVD group, n=20; control group, n=11) were harvested. The expression level of COMP was tested by western blot and immunohistochemistry. Dual immunofluorescence staining was used for locating COMP. Bone morphogenetic protein-2 (BMP2) signalling were tested by western blot. The animal model was also used to detect COMP level by immunohistochemistry. Results::The results showed that the expression level of COMP was significantly increased in the calcific valve samples when compared with that of the control valve ( P<0.05); COMP was expressed near the calcific nodules and co-localized with α-smooth muscle actin (α-SMA). The protein levels of BMP2 and p-Smads 1/5/9 were markedly more highly expressed in the CAVD group than the control group ( P<0.05). Furthermore, immunofluorescence detection showed that COMP and BMP2 were co-located in calcific valves. Conclusions::The above results suggested that upregulation of COMP and BMP2 may be associated with aortic valve calcification and that COMP may become a potential therapeutic target in human CAVD.

Objective::Calcific aortic valve disease (CAVD) affects millions of elderly people, and there is currently no effective way to stop or slow down its progression. Therefore, exploring the pathogenesis of CAVD is very important for prevention and treatment. Cartilage oligomeric matrix protein (COMP) have important role in cell phenotype change. This study is aimed to confirm whether COMP participate in CAVD and try to find the possible mechanisms.Methods::Human aortic valve tissues from Nanjing First Hospital (CAVD group, n=20; control group, n=11) were harvested. The expression level of COMP was tested by western blot and immunohistochemistry. Dual immunofluorescence staining was used for locating COMP. Bone morphogenetic protein-2 (BMP2) signalling were tested by western blot. The animal model was also used to detect COMP level by immunohistochemistry. Results::The results showed that the expression level of COMP was significantly increased in the calcific valve samples when compared with that of the control valve ( P<0.05); COMP was expressed near the calcific nodules and co-localized with α-smooth muscle actin (α-SMA). The protein levels of BMP2 and p-Smads 1/5/9 were markedly more highly expressed in the CAVD group than the control group ( P<0.05). Furthermore, immunofluorescence detection showed that COMP and BMP2 were co-located in calcific valves. Conclusions::The above results suggested that upregulation of COMP and BMP2 may be associated with aortic valve calcification and that COMP may become a potential therapeutic target in human CAVD.

The problem of noise in ventilator has always been an important topic to study in the development of the ventilator. A great number of data are showing that there are still large gaps of research and application levels in noise control of the ventilator between China and some more advanced foreign countries. In this study, with cooperation of the Shanghai Medical Equipment Limited Liability Company, we used the computational fluid dynamics (CFD), software FLUENT, adopted the standard k-epsilon turbulence model and the SIMPLE algorithm to simulate the inner flow field of the continuous positive airway pressure (CPAP) ventilator's pressure generator. After a detailed analysis, we figured out that there are several deficiencies in this ventilator, like local reflow in volute, uneven velocity distribution and local negative pressure in inlet of the impeller, which easily lead to noise and affect the ventilator's performances. So, it needs to be improved to a certain extent.
Algorithms ; Computer Simulation ; Continuous Positive Airway Pressure ; adverse effects ; instrumentation ; Equipment Design ; methods ; Models, Theoretical ; Noise ; prevention & control

The problem of thrombus and hemolysis in blood pump has always been an important topic to study in the development of the blood pump. Numbers of research results show that it is the complicated flow and the high shear stress of the mechanical movement that result in the thrombus and hemolysis. In this study, with the cooperation of Shanghai Children's Medical Center, we have used computational fluid dynamics (CFD) commercial software FLUENT to compute and analyze the flow characteristics in a non-blade centrifugal blood pump. The results figure out that this pump has a reasonable flow distribution and the shear stress distribution is under the critical broken state of red blood cell; meanwhile, there is less thrombus and hemolysis in this pump. So it is in the foreground for clinical use.
Computer Simulation ; Heart Defects, Congenital ; therapy ; Heart-Assist Devices ; adverse effects ; Hemodynamics ; Hemolysis ; Hemorheology ; Humans ; Models, Theoretical ; Stress, Mechanical ; Thrombosis ; prevention & control

The lack of organs has been an crucial limiting factor for Chinese organ transplantation,thus it is in urgent need to effectively increase the number of donor organs.This article holds that,besides through publicity and education to promote unpaid voluntary organ donation,some incentive mechanisms are also required to serve as useful complements.Therefore,organs' origin can be expanded to a certain extent,and the intense supply and demand in organ transplantation can also be eased.Unifying organ transplantation practice in China,this paper explains the necessity of organ donation incentive mechanisms from both theoretical and practical significances,reveals the main elements of the incentive mechanisms,and explores the realization means.