Artificial organs最新文献_第5页

Unlocking Naturalistic Speech With Brain-Computer Interface 用脑机接口解锁自然语言。

IF 2.2 3区医学

Artificial organs Pub Date : 2025-05-12 DOI: 10.1111/aor.15021

Aakash M. Shah

引用次数: 0

Recent Progress in Artificial Organs 人造器官研究进展。

IF 2.2 3区医学

Artificial organs Pub Date : 2025-05-12 DOI: 10.1111/aor.15022

引用次数: 0

Aortic Pulse Wave Velocity and Extracellular Water Expansion in Hemodialysis Patients. 血液透析患者主动脉脉波速度与细胞外水扩张。

IF 2.2 3区医学

Artificial organs Pub Date : 2025-05-07 DOI: 10.1111/aor.15015

Roohi Chhabra, Andrew Davenport

{"title":"Aortic Pulse Wave Velocity and Extracellular Water Expansion in Hemodialysis Patients.","authors":"Roohi Chhabra, Andrew Davenport","doi":"10.1111/aor.15015","DOIUrl":"https://doi.org/10.1111/aor.15015","url":null,"abstract":"Background: Pulse wave velocity (PWV), a measurement of arterial stiffness, is a risk factor for cardiovascular mortality in hemodialysis patients. Debate continues as to whether PWV is increased by volume overload. As such, we reviewed the association between volume overload and PWV.Methods: We measured aortic PWV (aPWV) in hemodialysis patients attending routine dialysis sessions with contemporaneous measurements of extracellular water/total body water (ECW/TBW) ratios using multifrequency bioimpedance.Results: A total of 102 patients, 63.7% male, mean age 63.5 ± 15.9 years, 44.1% diabetic, median dialysis duration 22.2 (4.9-52.8) months, weight 73.7 ± 15.8 kg, and central systolic blood pressure 157 ± 35 mmHg had a mean aPWV of 10.1 ± 2.5 m/s. Patients dialyzed with a low dialysate calcium (median 1.0 [1.0-1.25] mmol/L). Patients with aPWV of ≥ 10 m/s were older (72.9 ± 10.3 vs. 52.6 ± 14.4 years, p < 0.01) with a higher ECW/TBW ratio (40.6 ± 1.3 vs. 39.6 ± 1.7, p < 0.001), with no differences in active vitamin D3 or calcium-containing medications. Aortic PWV was associated with age (r = 0.9, p < 0.001) and ECW/TBW (r = 0.33, p = < 0.001), and after adjusting aPWV for age, ECW/TBW remained higher (40.5 ± 1.5 vs. 39.5 ± 1.5, p < 0.001). On multivariable testing, ECW/TBW remained independently associated with a raised aPWV (odds ratio [OR] 1.59 (95% confidence intervals [CI] 1.06-2.41), p = 0.026), and after age adjustment (OR 1.74 (95% CI 1.19-2.53, p = 0.004)).Conclusions: This study highlights the association between volume overload, as determined by bioimpedance in hemodialysis patients, and arterial stiffness measured by aPWV. These results would reinforce the importance of improving volume control in hemodialysis patients to reduce cardiovascular risk.","PeriodicalId":8450,"journal":{"name":"Artificial organs","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143960482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Automation of Ultrafiltration Rate Control by Glucose Concentration Regulation in Peritoneal Dialysis Solution. 通过调节腹膜透析液中葡萄糖浓度控制超滤速率的自动化。

IF 2.2 3区医学

Artificial organs Pub Date : 2025-05-07 DOI: 10.1111/aor.15019

Kirill Pozhar, Boris Putrya, Nikita Zhilo, Koushik Guha, Sergey Selishchev

{"title":"Automation of Ultrafiltration Rate Control by Glucose Concentration Regulation in Peritoneal Dialysis Solution.","authors":"Kirill Pozhar, Boris Putrya, Nikita Zhilo, Koushik Guha, Sergey Selishchev","doi":"10.1111/aor.15019","DOIUrl":"https://doi.org/10.1111/aor.15019","url":null,"abstract":"Background: Glucose absorption into the bloodstream and body tissues poses a significant challenge in peritoneal dialysis, resulting in a reduced ultrafiltration rate and requiring the use of a dialysate with a high initial glucose concentration. The goal of the presented study is to develop a system for controlling glucose concentration and ultrafiltration rate.Methods: The paper proposes a method for the automatic control of glucose infusion to maintain a given glucose concentration and ultrafiltration rate. This method utilizes an optical glucose monitor and a control strategy that combines feedback with prediction of peritoneal volume. Computer simulations were conducted to evaluate the efficiency of the method under various conditions, including errors in the glucose monitor, inaccuracies in parameter determination, and drift in patient parameters. Additionally, the method was compared to an open loop.Results and conclusions: Our results demonstrate the feasibility of using noninvasive glucose monitoring systems and the proposed control strategy to maintain a given dialysate glucose concentration. The proposed closed loop provides more stable maintenance of glucose concentration and ultrafiltration rate for at least 12 h, even in the presence of significant glucometer errors, compared to continuous glucose infusion.","PeriodicalId":8450,"journal":{"name":"Artificial organs","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143966216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigating M101's Effect in Improving Cardiac and Diaphragmatic Mechanical and Functional Properties on Wistar Rat. 探讨M101对Wistar大鼠心脏和膈肌力学和功能的改善作用。

IF 2.2 3区医学

Artificial organs Pub Date : 2025-05-06 DOI: 10.1111/aor.15014

Ollivier Grimault, Michael Theron, Quentin Boete, Mathieu Maalouf, Jean-Baptiste Quéméneur, Franck Zal, Karelle Léon, Karine Pichavant-Rafini

{"title":"Investigating M101's Effect in Improving Cardiac and Diaphragmatic Mechanical and Functional Properties on Wistar Rat.","authors":"Ollivier Grimault, Michael Theron, Quentin Boete, Mathieu Maalouf, Jean-Baptiste Quéméneur, Franck Zal, Karelle Léon, Karine Pichavant-Rafini","doi":"10.1111/aor.15014","DOIUrl":"https://doi.org/10.1111/aor.15014","url":null,"abstract":"Background: The critical importance of effective oxygen delivery during organ preservation to prevent ischemia-reperfusion injury has been reported in the literature. Moreover, traditional preservation methods often fail to meet oxygenation needs, prompting research into alternatives like hemoglobin-based oxygen carriers (HBOCs) such as M101 provided by HEMARINA. This extracellular hemoglobin, derived from Arenicola marina, shows a high affinity for oxygen and delivers it through a physiological gradient under hypoxic conditions.Methods: In this context, the mechanical and functional properties of the heart and diaphragm muscles from Wistar rats were evaluated in the presence of M101.Results: The experiments showed that M101-treated hearts maintained higher contraction amplitudes, heart rates, and coronary flow over time compared to controls, indicating improved functional stability. Furthermore, the M101-treated diaphragm exhibited prolonged contraction and relaxation times, with significant improvements in contraction amplitude at higher stimulation frequencies. Finally, the Burke index revealed reduced fatigue in the M101-treated group compared to the controls.Conclusions: These findings suggest that M101 significantly enhances the mechanical and functional properties of both tested muscles under experimental conditions. Further research is warranted to unravel these findings and explore clinical applications.","PeriodicalId":8450,"journal":{"name":"Artificial organs","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143959934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of Preoperative Anatomical Characteristics on the Direction of Inflow Cannula in HeartMate 3. 术前解剖特征对心脏导管流入方向的影响

IF 2.2 3区医学

Artificial organs Pub Date : 2025-05-05 DOI: 10.1111/aor.15018

Shusuke Imaoka, Daisuke Yoshioka, Shunsuke Saito, Takuji Kawamura, Ai Kawamura, Ryohei Matsuura, Yusuke Misumi, Koichi Toda, Shigeru Miyagawa

{"title":"Influence of Preoperative Anatomical Characteristics on the Direction of Inflow Cannula in HeartMate 3.","authors":"Shusuke Imaoka, Daisuke Yoshioka, Shunsuke Saito, Takuji Kawamura, Ai Kawamura, Ryohei Matsuura, Yusuke Misumi, Koichi Toda, Shigeru Miyagawa","doi":"10.1111/aor.15018","DOIUrl":"https://doi.org/10.1111/aor.15018","url":null,"abstract":"Background: The influence of inflow cannula (IC) direction in HeartMate 3 (HM3) remains unclear. We investigated preoperative anatomical characteristics related to IC direction by analyzing computed tomography (CT) images and assessed the relationship between prognosis and IC direction in HM3.Methods: We evaluated 48 patients who underwent HM3 implantation and categorized them based on the IC direction: anterior/lateral wall (group A, n = 18), mitral/aortic valve (B, n = 21), and posterior/inferior wall (C, n = 9). In preoperative CT, the positional relationship between the mitral valve, left ventricle (LV) apex, chest wall, and diaphragm was evaluated. The survival rate and freedom rate from complications after HM3 implantation in each group were evaluated.Results: On preoperative CT, group A had a higher mitral valve height from the LV apex than group B (68 ± 13 and 52 ± 14 mm, respectively; p < 0.01). Group C had a longer distance between the LV apex and chest wall than group B (20 ± 9 and 9 ± 6 mm, p < 0.01). Group C had a shorter thoracic depth from the LV apex than did group B (24 ± 9 and 39 ± 11 mm, p < 0.01). The 3-year survival rates after HM3 implantation for groups A, B, and C were 88%, 90%, and 100%, respectively. The rates of freedom from complications after HM3 implantation at 3 years in groups A, B, and C were 50%, 43%, and 20%, respectively.Conclusions: The IC direction in HM3 was influenced by the preoperative position of the mitral valve, LV apex, chest wall, and diaphragm. The IC direction in HM3 did not significantly affect survival rates.","PeriodicalId":8450,"journal":{"name":"Artificial organs","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143960629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simultaneous Ex Situ Normothermic Perfusion of Paired Kidneys in Pigs. 猪成对肾脏同步离体恒温灌注。

IF 2.2 3区医学

Artificial organs Pub Date : 2025-05-02 DOI: 10.1111/aor.15016

Margaux Navez, Nicholas Gilbo, Morgan Vandermeulen, Tiago Pinto Coelho, Pauline Erpicum, Marc Gilbert Lagny, Clarisse Malisoux, Claire Guarin, Gabriel Thierry, Pierre Delanaye, Etienne Cavalier, François Jouret, Olivier Detry

{"title":"Simultaneous Ex Situ Normothermic Perfusion of Paired Kidneys in Pigs.","authors":"Margaux Navez, Nicholas Gilbo, Morgan Vandermeulen, Tiago Pinto Coelho, Pauline Erpicum, Marc Gilbert Lagny, Clarisse Malisoux, Claire Guarin, Gabriel Thierry, Pierre Delanaye, Etienne Cavalier, François Jouret, Olivier Detry","doi":"10.1111/aor.15016","DOIUrl":"https://doi.org/10.1111/aor.15016","url":null,"abstract":"Background: Normothermic Machine Perfusion (NMP) is essential in renal transplantation to improve organ viability before transplantation. This study presents a proof of concept for simultaneous ex situ perfusion of paired porcine kidneys using exogenous creatinine and iohexol clearances to assess renal function, with the primary objective of examining intra-individual differences.Methods: Five kidney pairs (n = 10) were harvested from pigs, preserved at 4°C for 3 h, and subjected to 6-h NMP. Each pair was perfused with a solution containing red blood cells, and perfusion parameters were monitored continuously. Biochemical parameters were assessed using hourly perfusate and urine samples. Kidney function was evaluated using creatinine, which was introduced during the priming procedure.Results: No significant differences were observed between paired kidneys in terms of perfusion and biochemical parameters. Both kidneys maintained stable mean arterial pressures (67.40 ± 12.08 mmHg for right vs. 71.50 ± 4.36 mmHg for left) and flows (68.90 ± 38.61 mL/min vs. 54.00 ± 26.08 mL/min), with consistent electrolyte balance and pH levels. The high inter-individual variability in perfusion and biochemical parameters underscores the importance of paired comparisons.Conclusions: This pig model of simultaneous NMP of paired kidneys demonstrates that the intra-individual variance is low, which makes it possible to test treatments prior to kidney transplantation using one kidney as a valid comparator of the other.","PeriodicalId":8450,"journal":{"name":"Artificial organs","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143960551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Differences and Commonalities of Electrical Stimulation Paradigms After Central Paralysis and Amputation. 中枢性麻痹与截肢后电刺激模式的异同。

IF 2.2 3区医学

Artificial organs Pub Date : 2025-05-02 DOI: 10.1111/aor.15017

Thomas Stieglitz, Ines Bersch, Natalie Mrachacz-Kersting, Cristian Pasluosta

{"title":"Differences and Commonalities of Electrical Stimulation Paradigms After Central Paralysis and Amputation.","authors":"Thomas Stieglitz, Ines Bersch, Natalie Mrachacz-Kersting, Cristian Pasluosta","doi":"10.1111/aor.15017","DOIUrl":"https://doi.org/10.1111/aor.15017","url":null,"abstract":"Background: Patients with spinal cord injury (SCI) or with severe brain stroke suffer from life-lasting functional and sensory impairments. Other traumatic injuries such as limb loss after an accident or disease also affect motor function and sensory feedback and impair quality of life in those individuals. Invasive and non-invasive functional electrical stimulation (FES) is a well-established method to partially restore function and sensory feedback of paralyzed and phantom limbs. It is also a supporting technology for the rehabilitation of the neuromuscular system and for complementing assistive devices.Methods: This work reviews the current state-of-the-art of FES as a technology for restoring function and supporting rehabilitation therapy and assistive devices.Results: Electrodes, electrical stimulation, use of brain signals for rehabilitation and control, and sensory feedback are covered as parts of the whole. A perspective is given on how clinical and research protocols developed for patients with SCI and brain injuries can be translated to the treatment of patients with an amputation and vice versa. We further elaborate on how motor learning strategies with quantitative electrophysiological and kinematic measurements may help caregivers in the rehabilitation process. Insights from practitioners (collected during a workshop of the IFESS 2025) have been integrated to summarize common needs, open questions, and challenges.Conclusions: The information from the literature and from practitioners was integrated to propose the next steps towards establishing common guidelines and measures of FES in clinical practice towards evidence-driven treatment and objective assessments.","PeriodicalId":8450,"journal":{"name":"Artificial organs","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143953133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In Vitro Comparison of Device-Induced Hemolysis, Platelet Defects, and von Willebrand Factor Degradation Between the HeartMate 2 and HeartMate 3 Pumps. 心脏伴侣2和心脏伴侣3泵之间装置诱导的溶血、血小板缺陷和血管性血友病因子降解的体外比较

IF 2.2 3区医学

Artificial organs Pub Date : 2025-04-24 DOI: 10.1111/aor.15013

John Vandenberge, Dong Han, Wenji Sun, Shigang Wang, Douglas Tran, Nancy Kim, Kiersten Clark, Randy Perez, Bartley P Griffith, Zhongjun J Wu

{"title":"In Vitro Comparison of Device-Induced Hemolysis, Platelet Defects, and von Willebrand Factor Degradation Between the HeartMate 2 and HeartMate 3 Pumps.","authors":"John Vandenberge, Dong Han, Wenji Sun, Shigang Wang, Douglas Tran, Nancy Kim, Kiersten Clark, Randy Perez, Bartley P Griffith, Zhongjun J Wu","doi":"10.1111/aor.15013","DOIUrl":"10.1111/aor.15013","url":null,"abstract":"Background: Left ventricular assist devices (LVADs) have been utilized to maintain the circulatory demands of patients with end-stage heart failure. Despite their positive impact, hemocompatibility-related adverse events remain a major challenge. The aim of this study is to compare in vitro hemocompatibility performance between the HeartMate 2 (HM2) and HeartMate 3 (HM3) pumps by assessing device-induced blood damage in an in vitro circulatory loop.Methods: Fresh healthy human blood was circulated for 4 h in a circulatory loop assisted by an HM2 or HM3 pump at a flow rate of 4.5 L/min and a pressure head of 75 mmHg. Hourly blood samples were collected for analysis of hemolysis, platelet activation, platelet receptor shedding, and high molecular weight multimer (HMWM) degradation of von Willebrand factor (VWF).Results: The data from the hourly blood samples showed that the HM3 pump caused significantly lower levels of hemolysis, platelet activation, platelet receptor shedding, and HMWM degradation of VWF compared to the HM2 pump.Conclusion: The HM3 exhibited superior overall hemocompatibility to the HM2, underscoring the advantages of the fully magnetically levitated centrifugal pump design in the HM3 compared to the mechanical bearing-supported axial pump design of the HM2.","PeriodicalId":8450,"journal":{"name":"Artificial organs","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143963608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Upcoming Meetings 即将到来的会议

IF 2.2 3区医学

Artificial organs Pub Date : 2025-04-24 DOI: 10.1111/aor.14992

引用次数: 0