{"title":"Construction of a coagulation prediction model of the extracorporeal circulation circuit during hemodialysis with regional citrate anticoagulant (RCA).","authors":"Yanyan Gong, Menglin Zou, Laimin Luo","doi":"10.1177/03913988241269524","DOIUrl":"10.1177/03913988241269524","url":null,"abstract":"<p><strong>Objective: </strong>To construct a prediction model of coagulation in the extracorporeal circulation circuit during hemodialysis with regional citrate anticoagulant(RCA) conditions.</p><p><strong>Methods: </strong>This was a single-center, retrospective study. The clinical data of patients who received hemodialysis with RCA from February 2021 to March 2022 were collected. The risk predictors of coagulation in the extracorporeal circulation circuit were screened by LASSO regression. On this basis, we used multivariate logistic regression analysis to establish a nomogram prediction model.</p><p><strong>Results: </strong>A total of 98 patients received RCA hemodialysis for 362 times. Among them, 155 treatments with complete data were included in the study. Among the 155 treatments, coagulation of the extracorporeal circulation circuit occurred 12 times. The use of arteriovenous fistulas(AVF), the venous pressure at 4 h after hemodialysis initiation, blood flow velocity, dialyzer manufacturer, Systemic iCa<sup>2+</sup> at 1 h after hemodialysis initiation, plasma albumin level, and plasma d-dimer level were influencing factors of coagulation in the extracorporeal circuit during hemodialysis with RCA (<i>p</i> < 0.05). A nomogram model was made out of the above indicators. The area under the receiver operating characteristic (ROC) curve for predicting coagulation in the circuit was 0.967 (95% CI: 0.935-0.998). The internal validation result of the memory testing (bootstrap method) showed that the area under the ROC curve was 0.967 (95% CI: 0.918-0.991).</p><p><strong>Conclusion: </strong>The nomogram model has good discrimination and calibration and can intuitively and succinctly predict the risk of coagulation in the extracorporeal circulation circuit during hemodialysis with RCA.</p>","PeriodicalId":13932,"journal":{"name":"International Journal of Artificial Organs","volume":" ","pages":"749-755"},"PeriodicalIF":1.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142017344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tong Wu, Lei Han, Ye Zhu, Xiaojun Zeng, Yating Kang, Shuwen Zheng, Zhenhai Wang, Jianping Wang, Yonglin Gao
{"title":"Application of decalcified bone matrix in Salmon bone for tibial defect repair in rat model.","authors":"Tong Wu, Lei Han, Ye Zhu, Xiaojun Zeng, Yating Kang, Shuwen Zheng, Zhenhai Wang, Jianping Wang, Yonglin Gao","doi":"10.1177/03913988241269498","DOIUrl":"10.1177/03913988241269498","url":null,"abstract":"<p><strong>Aim: </strong>The optimal preparation conditions of Salmon decalcified bone matrix (S-DBM) were explored, and the properties of S-DBM bone particles and bone powder were studied respectively. The therapeutic effect of S-DBM on tibial defect in female Sprague Dawley (SD) rats was preliminarily verified.</p><p><strong>Methods: </strong>This study assessed the structural and functional similarities of Salmon bone DBM (S-DBM). The biocompatibility assessment was conducted using both in vivo and in vitro experiments, establishing an animal model featuring tibial defects in rats and on the L929 cell line, respectively. The control group, bovine DBM (bDBM), was compared to the S-DBM-treated tibial defect rats. Imaging and histology were used to study implant material changes, defect healing, osteoinductive repair, and degradation.</p><p><strong>Results: </strong>The findings of our study indicate that S-DBM exhibits favorable repairing effects on bone defects, along with desirable physicochemical characteristics, safety, and osteogenic activity.</p><p><strong>Conclusions: </strong>The S-DBM holds significant potential as a medical biomaterial for treating bone defects, effectively fulfilling the clinical demands for materials used in bone tissue repair engineering.</p>","PeriodicalId":13932,"journal":{"name":"International Journal of Artificial Organs","volume":" ","pages":"783-792"},"PeriodicalIF":1.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142017343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Flexible inner surface of polysulfone membranes prevents platelet adhesive protein adsorption and improves antithrombogenicity in vitro.","authors":"Ryo Takatsuji, Masahide Koremoto, Yoko Fujimoto, Yuko Saida, Yoshihiro Hatanaka","doi":"10.1177/03913988241269465","DOIUrl":"10.1177/03913988241269465","url":null,"abstract":"<p><strong>Background: </strong>We investigated whether the condition of the inner surface of hollow fibers affects the blood compatibility of hemodialyzers.</p><p><strong>Methods: </strong>We used scanning probe microscope/atomic force microscopy (SPM/AFM) to investigate the height of the swelling and flexible layers (thickness and softness) on the inner surfaces of the hollow fibers. Next, we tested the blood compatibility between dialyzers comprising a hollow fiber membrane, in which the other dialyzers, except for PVP, were additionally coated using PS membranes coated with other materials. After blood was injected into the dialyzer and plugged, dynamic stimulation was performed by slightly rotating the dialyzer for 4 h, although there was no blood circulation.</p><p><strong>Results: </strong>The vitamin E-coated polysulfone (PS) membrane showed a higher thickness and softness of the flexible layer than the asymmetric cellulose triacetate membrane without polyvinylpyrrolidone (PVP) and the PS membranes with PVP. We found that the dialyzer with vitamin E coating significantly suppressed the decrease in platelets, increase in β-TG, and increase in PF4 compared to those coated with NV polymer. Additionally, as the adsorbed protein on the inner surface, the total protein, fibronectin, and vWF levels were significantly lower in the vitamin E-coated dialyzer.</p><p><strong>Conclusion: </strong>The thickness and softness of the flexible layer of the inner surface of the hollow fiber membrane in vitro affect differences in blood coagulation performance in clinical research. Future clinical trials are required to confirm our results.</p>","PeriodicalId":13932,"journal":{"name":"International Journal of Artificial Organs","volume":" ","pages":"774-782"},"PeriodicalIF":1.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11823271/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142125664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Stefanie Broszeit, Joachim Kron, Til Leimbach, John Volkenandt, Susanne Kron
{"title":"Vascular refilling in hemodialysis using feedback-controlled ultrafiltration profile.","authors":"Stefanie Broszeit, Joachim Kron, Til Leimbach, John Volkenandt, Susanne Kron","doi":"10.1177/03913988241264709","DOIUrl":"10.1177/03913988241264709","url":null,"abstract":"<p><strong>Background: </strong>The rate and the duration of ultrafiltration (UF) are considered the most important factors to affect vascular refilling. The aim of the study was to investigate whether a UF profile could improve the vascular refilling.</p><p><strong>Methods: </strong>Dialysis was delivered by a machine providing feedback control of ultrafiltration rates. Absolute blood volume (BV) was measured by dialysate bolus method. Vascular refilling volume (<i>V</i><sub>ref</sub>) was calculated as UF volume - Δ absolute BV.</p><p><strong>Results: </strong>In 40 patients, refilling fraction (<i>V</i><sub>ref</sub>/UF volume) was 30.5% in the first hour. Thereafter, refilling fraction steeply increased and reached maximum values in the third and fourth hour at about 95%. The cumulative refilling fraction was 68.5 ± 9.4% at the end. In 14 patients, refilling data from the feedback-controlled UF profile were compared to dialysis sessions with constant UF rates. In 12 of 14 patients, refilling fraction was significantly (<i>p</i> = 0.013) higher in sessions with UF profile (71.6% vs 64.4%).There was a significant negative correlation (<i>r</i> = -0.606; <i>p</i> = 0.002) between the blood volume to extracellular volume ratio and the refilling fraction. The sum of this ratio and the refilling fraction was 1.01 ± 0.06.</p><p><strong>Conclusions: </strong>Despite significant differences, a feedback-controlled UF profile has no advantage over the previous refilling studies with regard to the refilling fraction because vascular refilling seems to depend mainly on the ratio of BV to ECV. This would explain the different results in studies using BV guided UF feedback programs.</p>","PeriodicalId":13932,"journal":{"name":"International Journal of Artificial Organs","volume":" ","pages":"723-728"},"PeriodicalIF":1.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141889126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
John K Leypoldt, Mauro Pietribiasi, Malgorzata Debowska, Monika Wieliczko, Malgorzata Twardowska-Kawalec, Jolanta Malyszko, Jacek Waniewski
{"title":"Evaluating hydrogen ion mobilization during hemodialysis using only predialysis and postdialysis blood bicarbonate concentrations.","authors":"John K Leypoldt, Mauro Pietribiasi, Malgorzata Debowska, Monika Wieliczko, Malgorzata Twardowska-Kawalec, Jolanta Malyszko, Jacek Waniewski","doi":"10.1177/03913988241268026","DOIUrl":"10.1177/03913988241268026","url":null,"abstract":"<p><strong>Introduction: </strong>The hydrogen ion (H<sup>+</sup>) mobilization model has been previously shown to provide a quantitative description of intradialytic changes in blood bicarbonate (HCO<sub>3</sub>) concentration during hemodialysis (HD). The current study evaluated the accuracy of different methods for estimating the H<sup>+</sup> mobilization parameter (H<sub>m</sub>) from this model.</p><p><strong>Methods: </strong>The study compared estimates of the H<sup>+</sup> mobilization parameter using predialysis, hourly during the HD treatment, and postdialysis blood HCO<sub>3</sub> concentrations (H<sub>m</sub>-full2) with those determined using only predialysis and postdialysis blood HCO<sub>3</sub> concentrations assuming steady state conditions (H<sub>m</sub>-SS2) during the midweek treatment in 24 chronic HD patients treated thrice weekly.</p><p><strong>Results: </strong>Estimated H<sub>m</sub>-full2 values (0.163 ± 0.079 L/min [mean ± standard deviation]) were higher than, but not statistically different (<i>p</i> = 0.067) from, those of H<sub>m</sub>-SS2 (0.152 ± 0.065 L/min); the values of H<sub>m</sub>-full2 and H<sub>m</sub>-SS2 were highly correlated with a correlation coefficient of 0.948 and a mean difference that was small (0.011 L/min). Further, the H<sup>+</sup> mobilization parameter values calculated using only predialysis and postdialysis blood HCO<sub>3</sub> concentrations during the first and third HD treatments of the week were not different from those calculated during the midweek treatment.</p><p><strong>Conclusions: </strong>The H<sup>+</sup> mobilization model can be used to provide estimates of the H<sup>+</sup> mobilization parameter without the need to measure hourly intradialytic blood HCO<sub>3</sub> concentrations.</p>","PeriodicalId":13932,"journal":{"name":"International Journal of Artificial Organs","volume":" ","pages":"729-735"},"PeriodicalIF":1.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141987865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"An analytic method to investigate hemodynamics of the cardiovascular system: Biventricular system.","authors":"Yuxin Zhu, Xu Mei, Wanning Ge, Tingting Wu, Liudi Zhang, Polin Hsu","doi":"10.1177/03913988241260943","DOIUrl":"10.1177/03913988241260943","url":null,"abstract":"<p><p>Previously, we found analytic solutions for single ventricular system based on the lumped parameter model (LPM). In this study, we generalized the method to biventricular system and derived its analytic solutions. LPM is just a set of differential equations, but it is difficult to solve due to time-varying ventricular elastance and high order. Mathematically, there exist no elementary solutions for time-varying equations. It turns out that instead of differential equations, according to volume conservation, a set of algebraic equations can be carried out. The solutions of the set of equations are just physiological states at end of systolic and diastolic phases such as end systolic/diastolic pressure/volume of left ventricle. As a preliminary application, the method is utilized to deduce the hemodynamic effects of VA ECMO. Left ventricular (LV) distension, a serious complication of VA ECMO, is usually attributed to factors such as increased afterload, inadequate LV unloading, reduced myocardial contractility or aortic valve regurgitation (AR), bronchial and Thebesian return in the absence of aortic valve (AoV) opening. Among these, reduced contractility and AR are strongly associated with LV distension. However, in the absence of reduced contractility or AR, it is less clear whether increased afterload or inadequate LV unloading alone can cause LV distension. This leads to the critical question: under what conditions does LV distension occur in the absence of reduced contractility or AR? The analytic formulas derived in this study give conditions for LV distension. Furthermore, the results show that the analytic hemodynamics are coincident with simulated results.</p>","PeriodicalId":13932,"journal":{"name":"International Journal of Artificial Organs","volume":" ","pages":"681-697"},"PeriodicalIF":1.4,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141901691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Wasim S El Nekidy, Iyad Ghazal, Emna Abidi, Diana Malaeb, Islam M Ghazi, Rania El Lababidi, Mohamad Mooty, Amir Malik, Muriel Ghosn, Jihad Mallat
{"title":"Efficacy and safety of ertapenem dosing in patients with ESBL producing <i>Enterobacterales</i> infections utilizing renal replacement therapies.","authors":"Wasim S El Nekidy, Iyad Ghazal, Emna Abidi, Diana Malaeb, Islam M Ghazi, Rania El Lababidi, Mohamad Mooty, Amir Malik, Muriel Ghosn, Jihad Mallat","doi":"10.1177/03913988241264463","DOIUrl":"10.1177/03913988241264463","url":null,"abstract":"<p><strong>Purpose: </strong>The clinical efficacy and safety of ertapenem use in patients undergoing renal replacement therapies (RRT) are not well-documented. Therefore, we aimed to investigate the safety and efficacy of ertapenem in patients with sepsis secondary to Enterobacterales who are undergoing RRT.</p><p><strong>Methods: </strong>A retrospective cohort study was conducted on patients who met the inclusion criteria at our hospital between May 2015 and December 2021. The primary endpoint was 30-day mortality. Secondary endpoints included clinical cure, microbiologic cure, recurrence rate, and incidence of seizures.</p><p><strong>Results: </strong>During the study period, 158 patients met the inclusion criteria. Of these, 86 were male (54.4%), the mean age was 66.4 ± 13.8 years, and the mean weight was 77 ± 22.4 kg. The most common diagnosis was bacteremia in 48 (30.4%) subjects, followed by urinary tract infection in 39 (24.7%) subjects, and pneumonia in 35 (22.2%) patients. The most isolated pathogens were <i>Escherichia coli</i>, followed by <i>Klebsiella</i> species. The median ertapenem dose was 0.5 g intravenously (IV) daily in those who received intermittent hemodialysis (IHD) and 1 g IV daily for those who received continuous veno-venous hemofiltration (CVVH). The 30-day mortality rate was 24%, the clinical cure rate was 89.2%, the microbiologic cure rate was 82%, the 30-day recurrence rate was 41.1%, and the incidence of seizures was 2.5%. Multivariate logistic regression analysis indicated that age (OR 1.04 [95% CI: 1.003-1.075]), being critically ill at therapy initiation (OR 2.9 [95% CI: 1.1-7.5]), and Enterobacterales other than <i>Klebsiella species</i> and <i>Escherichia coli</i> (OR 3.8 [95% CI: 1.1-12.5]) were significant independent risk factors associated with mortality in this population. Ertapenem dose was not associated with mortality.</p><p><strong>Conclusion: </strong>Our findings suggest that the commonly used doses of ertapenem in patients undergoing IHD and CVVH are clinically effective but may pose a higher risk of seizures. A comprehensive pharmacokinetic study is needed to determine the most effective and safe dose for this population.</p>","PeriodicalId":13932,"journal":{"name":"International Journal of Artificial Organs","volume":" ","pages":"653-658"},"PeriodicalIF":1.4,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141792429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Study on the recovery of bladder function in patients with cervical cancer after operation by portable ultrasound combined.","authors":"Yu-Ting Zhao, Shuai Guo, Zai-Chun Shang, Hong-Yi Ding, Jian-Hua Jin, Kai-Yue Chu, Bin-Bin Ge, Peng-Qin Xu","doi":"10.1177/03913988241262593","DOIUrl":"10.1177/03913988241262593","url":null,"abstract":"<p><strong>Background: </strong>Postoperative urination dysfunction is a common complication after surgery in patients with cervical cancer. Portable bladder ultrasound are commonly utilized in clinical practice for measuring residual urine volume. This study aimed to the effect of bladder function training combined with portable ultrasound monitoring on bladder function recovery in patients with cervical cancer after training.</p><p><strong>Methods: </strong>A total of 40 postoperative patients with cervical cancer were randomly divided into a control group (A) and an experimental group (B) of 20 cases each. Group A was given routine postoperative care, while group B was given bladder function training. Urgent urine bladder volume were taken twice daily after removal of the urinary catheter and monitored for five consecutive days. The difference of urgent urine bladder volume and bladder filling rate were compared by <i>t</i>-test and chi-square test respectively. The 36-item Short Form Health Survey (SF-36) was used to evaluate the quality of life of patients before and after intervention, and compared by Mann-Whitney <i>U</i> test.</p><p><strong>Results: </strong>There was no significant difference in preoperative urgent urine volume between the two groups. After catheter removal, the bladder volume of patients in the B increased, while the bladder volume of patients in the A increased less and fluctuated greatly. The bladder filling rate in the A was significantly lower than that in the B (5/15 vs 17/18, <i>p</i> < 0.05). After intervention, the quality of life of the experimental group was better than that of the control group, including scores of general health, mental health, vitality, and physical role (<i>p</i> < 0.05).</p><p><strong>Conclusion: </strong>Postoperative cervical cancer patients trained to hold urine by portable ultrasound monitoring are able to recover bladder function.</p>","PeriodicalId":13932,"journal":{"name":"International Journal of Artificial Organs","volume":" ","pages":"659-665"},"PeriodicalIF":1.4,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141792464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Development of in situ forming autologous fibrin scaffold incorporating synthetic teriparatide peptide for bone tissue engineering.","authors":"Mohammad Reza Khalili, Azam Molafilabi, Sepideh Mousazadeh, Arezou Mehrabi, Jafar Kiani, Peiman Brouki Milan, Faezeh Ghasemi","doi":"10.1177/03913988241262907","DOIUrl":"10.1177/03913988241262907","url":null,"abstract":"<p><strong>Introduction: </strong>This study investigates the potential of an in-situ forming scaffold using a fibrin-based scaffold derived from autologous plasma combined with Synthetic Teriparatide (TP) for bone regeneration application. TP is known for its bone formation stimulation but has limited clinical use due to side effects. This autologous delivery system aims to provide precise, controlled, localized, and long-term release of TP for accelerating bone regeneration.</p><p><strong>Methods: </strong>Fibrinogen from autologous plasma was extracted using ethanol, and thrombin was precipitated with ammonium sulfate to create the fibrin scaffold. Characterization of fibrinogen was done through FTIR, SDS-Page, porosity, SEM, degradation, and rheology tests. Viability was assessed by MTT in five groups with different concentrations of TP in fibrin scaffold (50, 100, and 150 µl/ml), fibrin alone, and a control group against HEK and Wharton's jelly cells. The release profile of different concentrations of TP in the fibrin scaffold was also examined.</p><p><strong>Results: </strong>The formation time of the fibrin scaffold was 4 ± 0.2 s. The highest Infrared absorption for fibrinogen was confirmed. Rheology assessment revealed a higher elastic modulus than the viscous modulus. The created fibrin scaffold displayed a consistent three-dimensional microstructure with an interconnected porous network. Cytotoxicity assays demonstrated good biocompatibility and enhanced cell growth with different concentrations of TP in the fibrin scaffold. The TP release increased with higher concentrations, peaking at an average of 61% over 54 h.</p><p><strong>Conclusion: </strong>Autologous plasma-derived fibrin scaffolds incorporating TP exhibit satisfactory release within the scaffold and hold promise as a versatile bone filler for clinical use, facilitating osteoregeneration.</p>","PeriodicalId":13932,"journal":{"name":"International Journal of Artificial Organs","volume":" ","pages":"707-718"},"PeriodicalIF":1.4,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142380784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fangqun Wang, Fan Xu, Fenglian Zhu, Shaojun Wang, Chenyang He, Litao Ding, Mengping Li
{"title":"Performance study of dual heart assisted control system based on SL-SMC physiological combination controller.","authors":"Fangqun Wang, Fan Xu, Fenglian Zhu, Shaojun Wang, Chenyang He, Litao Ding, Mengping Li","doi":"10.1177/03913988241262911","DOIUrl":"10.1177/03913988241262911","url":null,"abstract":"<p><p>The main challenges of Biventricular Assist Devices (BiVAD) as a treatment modality for patients with Bicardiac heart failure heart failure are the balance of systemic blood flow during changes in physiological activity and the prevention of ventricular suction. In this study, a model of the Biventricular Circulatory System (BCS) was constructed and a physiological combination controller based on Starling-Like controller and Sliding Mode Controller (SMC) was proposed. The effects of the physiological controller on the hemodynamics of the BCS were investigated by simulating two sets of physiological state change experiments: elevated pulmonary artery resistance and resting-exercise, with constant speed (CS) control and combined Starling-like and PI control (SL-PI) as controllers. Simulation and experimental results showed that the Starling-like and Sliding Mode Control (SL-SMC) physiological combination controller was effective in preventing the occurrence of ventricular suction, providing higher cardiac output, maintain balance of systemic blood flow, and have higher response speed and robustness in the face of physiological state changes.</p>","PeriodicalId":13932,"journal":{"name":"International Journal of Artificial Organs","volume":" ","pages":"666-680"},"PeriodicalIF":1.4,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142286392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}