Christopher A Bresette, Susan M Shea, Scott Wagoner, Saagar Bakshi, Shriprasad R Deshpande, Kevin O Maher, David N Ku
{"title":"Novel tubing connectors reduce ECMO circuit thrombosis.","authors":"Christopher A Bresette, Susan M Shea, Scott Wagoner, Saagar Bakshi, Shriprasad R Deshpande, Kevin O Maher, David N Ku","doi":"10.1177/03913988241252255","DOIUrl":"10.1177/03913988241252255","url":null,"abstract":"<p><strong>Background: </strong>Thrombosis within extracorporeal membrane oxygenation (ECMO) circuits is a common complication that dominates clinical management of patients receiving mechanical circulatory support. Prior studies have identified that over 80% of circuit thrombosis can be attributed to tubing-connector junctions.</p><p><strong>Methods: </strong>A novel connector was designed that reduces local regions of flow stagnation at the tubing-connector junction to eliminate a primary source of ECMO circuit thrombi. To compare clotting between the novel connectors and the traditional connectors, both in vitro loops and an in vivo caprine model of long-term (48 h) ECMO were used to generate tubing-connector junction clots.</p><p><strong>Results: </strong>In vitro, the traditional connectors uniformly (9/9) formed large thrombi, while novel connectors formed a small thrombus in only one of nine (<i>p</i> < 0.0001). In the long-term goat ECMO circuits, the traditional connectors exhibited more thrombi (<i>p</i> < 0.04), and these thrombi were more likely to protrude into the lumen of the tubing (<i>p</i> < 0.001).</p><p><strong>Conclusion: </strong>Both in vitro and in vivo validation experiments successfully recreated circuit thrombosis and demonstrate that the adoption of novel connectors can reduce the burden of circuit thrombosis.</p>","PeriodicalId":13932,"journal":{"name":"International Journal of Artificial Organs","volume":" ","pages":"347-355"},"PeriodicalIF":1.7,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140922097","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":"Does native vitamin D, or active vitamin D modulate the neutralising antibody responses to COVID-19 vaccination in haemodialysis patients?","authors":"Andrew Davenport","doi":"10.1177/03913988241241204","DOIUrl":"10.1177/03913988241241204","url":null,"abstract":"<p><strong>Introduction: </strong>Several studies have reported that patients with low levels of Vitamin D<sub>3</sub> have impaired responses to vaccination, including COVID-19 vaccines, so we reviewed the response to COVID-19 vaccination in haemodialysis patients, who typically have reduced Vitamin D<sub>3</sub> levels.</p><p><strong>Methods: </strong>The inhibitory antibody (IC50) responses to several COVID-19 variants following vaccination in a cohort of United Kingdom haemodialysis patients receiving two vaccinations between March 2021 and May 2021 were reviewed.</p><p><strong>Results: </strong>A total of 183 haemodialysis patients, 65.5% male, mean age 65.6 ± 14.1 years, 46.4% diabetic, 42.1% white ethnicity, body mass index 26.9 ± 6.5 kg/m<sup>2</sup> dialysis vintage 36.2 (18.3-69.3) months were studied. Following the first vaccination, the median IgG microneutralisation IC50 response was undetectable for all variants (wild-type, alpha, beta and delta). Follow-up after the second vaccination showed that the microneutralisation response to all variants increased and was greater for the wild-type variant compared to alpha, beta and delta, all <i>p</i> < 0.001, There were no differences comparing the IC50 responses according to 25-Vitamin D<sub>3</sub> levels, and the prescription of activated Vitamin D. Although patients who had previously tested positive for COVID-19 prescribed higher doses of alfacalcidol had higher seroprotection responses to the alpha (χ<sup>2</sup> = 15, <i>p</i> = 0.002) and beta variants. (χ<sup>2</sup> = 13, <i>p</i> = 0.005).</p><p><strong>Conclusions: </strong>The response to COVID-19 vaccination was reduced in our elderly haemodialysis patients compared to younger less frail patients, however there was no overall demonstrable effect of either 25-Vitamin D<sub>3</sub> levels or the prescription of activated forms of Vitamin D on the immune response following vaccination against COVID-19, unless patients had previously tested positive for COVID-19.</p>","PeriodicalId":13932,"journal":{"name":"International Journal of Artificial Organs","volume":" ","pages":"251-259"},"PeriodicalIF":1.7,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140335535","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}
Igor Gostyuzhev, Adham Mohamed, Carole E Freiberger-O'Keefe, Michelle M Haines, Jonathan B Kozinn
{"title":"Association between a low-risk COVID-19 extracorporeal membrane oxygenation criteria and mortality: A retrospective study.","authors":"Igor Gostyuzhev, Adham Mohamed, Carole E Freiberger-O'Keefe, Michelle M Haines, Jonathan B Kozinn","doi":"10.1177/03913988241239198","DOIUrl":"10.1177/03913988241239198","url":null,"abstract":"<p><strong>Objective: </strong>Our study aimed to compare the outcomes of COVID-19 patients who met a low-risk inclusion criteria for veno-venous extra corporeal membrane oxygenation (VV ECMO) with those who did not meet criteria due to higher risk but were subsequently cannulated.</p><p><strong>Methods: </strong>This was a retrospective observational cohort study that included adult patients who were placed on VV ECMO for COVID-19 related acute respiratory distress syndrome (ARDS) at a tertiary care academic medical center. The primary outcome was the association between the low-risk criteria and mortality. The patients met the criteria if they met EOLIA severe ARDS criteria, no absolute contraindications (age > 60 years, BMI > 55 kg/m<sup>2</sup>, mechanical ventilation (MV) duration >7 days, irreversible neurologic damage, chronic lung disease, active malignancy, or advanced multiorgan dysfunction), and had three or less relative contraindications (age > 50 years, BMI > 45 kg/m<sup>2</sup>, comorbidities, MV duration > 4 days, acute kidney injury, receiving vasopressors, hospital LOS > 14 days, or COVID-19 diagnosis > 4 weeks).</p><p><strong>Results: </strong>Sixty-five patients were included from March 2020 through March 2022. Patients were stratified into low-risk or high-risk categories. The median Sequential Organ Failure Assessment score was 7 and the median PaO2/FiO2 ratio was 44 at the time of ECMO cannulation. The in-hospital mortality was 47.8% in the low-risk group and 69.0% in the high-risk group (<i>p</i> = 0.096).</p><p><strong>Conclusion: </strong>There was not a statistically significant difference in survival between low-risk patients and high-risk patients; however, there was a trend toward higher survival in the lower-risk group.</p>","PeriodicalId":13932,"journal":{"name":"International Journal of Artificial Organs","volume":" ","pages":"309-312"},"PeriodicalIF":1.7,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140174554","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}
Fausto Biancari, Tatu Juvonen, Sung-Min Cho, Francisco J Hernández Pérez, Camilla L'Acqua, Amr A Arafat, Mohammed M AlBarak, Mohamed Laimoud, Ilija Djordjevic, Robertas Samalavicius, Marta Alonso-Fernandez-Gatta, Sebastian D Sahli, Alexander Kaserer, Carmelo Dominici, Timo Mäkikallio
{"title":"External validation of the PC-ECMO score in postcardiotomy veno-arterial extracorporeal membrane oxygenation.","authors":"Fausto Biancari, Tatu Juvonen, Sung-Min Cho, Francisco J Hernández Pérez, Camilla L'Acqua, Amr A Arafat, Mohammed M AlBarak, Mohamed Laimoud, Ilija Djordjevic, Robertas Samalavicius, Marta Alonso-Fernandez-Gatta, Sebastian D Sahli, Alexander Kaserer, Carmelo Dominici, Timo Mäkikallio","doi":"10.1177/03913988241237701","DOIUrl":"10.1177/03913988241237701","url":null,"abstract":"<p><p>Reliable stratification of the risk of early mortality after postcardiotomy veno-arterial extracorporeal membrane oxygenation (V-A-ECMO) remains elusive. In this study, we externally validated the PC-ECMO score, a specific risk scoring method for prediction of in-hospital mortality after postcardiotomy V-A-ECMO. Overall, 614 patients who required V-A-ECMO after adult cardiac surgery were gathered from an individual patient data meta-analysis of nine studies on this topic. The AUC of the logistic PC-ECMO score in predicting in-hospital mortality was 0.678 (95%CI 0.630-0.726; <i>p</i> < 0.0001). The AUC of the logistic PC-ECMO score in predicting on V-A-ECMO mortality was 0.652 (95%CI 0.609-0.695; <i>p</i> < 0.0001). The Brier score of the logistic PC-ECMO score for in-hospital mortality was 0.193, the slope 0.909, the calibration-in-the-large 0.074 and the expected/observed mortality ratio 0.979. 95%CIs of the calibration belt of fit relationship between observed and predicted in-hospital mortality were never above or below the bisector (<i>p</i> = 0.072). The present findings suggest that the PC-ECMO score may be a valuable tool in clinical research for stratification of the risk of patients requiring postcardiotomy V-A-ECMO.</p>","PeriodicalId":13932,"journal":{"name":"International Journal of Artificial Organs","volume":" ","pages":"313-317"},"PeriodicalIF":1.7,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140093884","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":"Closed reduction of dislocated hip prosthesis using a traction table.","authors":"Tomonori Shigemura, Yohei Yamamoto, Yasuaki Murata","doi":"10.1177/03913988241234221","DOIUrl":"10.1177/03913988241234221","url":null,"abstract":"<p><p>This article describes three cases in which a dislocated hip prosthesis was reduced by a new reduction technique - that we previously described - using traction table. The dissociation of a prosthesis is a rare but serious complication of closed reduction manoeuvre. The new reduction manoeuvre using a traction table may be a good option to avoid dissociation of the prosthesis during closed reduction for treatment of dislocation after total hip arthroplasty.</p>","PeriodicalId":13932,"journal":{"name":"International Journal of Artificial Organs","volume":" ","pages":"299-302"},"PeriodicalIF":1.7,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140184410","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}
Shen Lv, Zhi-Peng He, Guang-Mao Liu, Sheng-Shou Hu
{"title":"A multi-constituent model for assessing the effect of impeller shroud on the thrombosis potential of a centrifugal blood pump.","authors":"Shen Lv, Zhi-Peng He, Guang-Mao Liu, Sheng-Shou Hu","doi":"10.1177/03913988241239456","DOIUrl":"10.1177/03913988241239456","url":null,"abstract":"<p><p>Centrifugal blood pumps can be used for treating heart failure patients. However, pump thrombosis has remained one of the complications that trouble clinical treatment. This study analyzed the effect of impeller shroud on the thrombosis risk of the blood pump, and predicted areas prone to thrombosis. Multi-constituent transport equations were presented, considering mechanical activation and biochemical activation. It was found that activated platelets concentration can increase with shear stress and adenosine diphosphate(ADP) concentration increasing, and the highest risk of thrombosis inside the blood pump was under extracorporeal membrane oxygenation (ECMO) mode. Under the same condition, ADP concentration and thrombosis index of semi-shroud impeller can increase by 7.3% and 7.2% compared to the closed-shroud impeller. The main reason for the increase in thrombosis risk was owing to elevated scalar shear stress and more coagulation promoting factor-ADP released. The regions with higher thrombosis potential were in the center hole, top and bottom clearance. As a novelty, the findings revealed that impeller shroud can influence mechanical and biochemical activation factors. It is useful for identifying potential risk regions of thrombus formation based on relative comparisons.</p>","PeriodicalId":13932,"journal":{"name":"International Journal of Artificial Organs","volume":" ","pages":"269-279"},"PeriodicalIF":1.7,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140174553","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":"Theranova versus FX80: The impact on anemia management in hemodialysis.","authors":"Tuncay Sahutoglu, Osman Erinc, Fevzi Necati Avsar","doi":"10.1177/03913988241236736","DOIUrl":"10.1177/03913988241236736","url":null,"abstract":"<p><strong>Background: </strong>Middle uremic toxins (MUTs) can cause anemia and erythropoietin hyporesponsiveness. Theranova dialyzers may improve anemia management by removing MUTs. Hence, the impact of Theranova dialyzers on erythropoietin responsiveness was studied.</p><p><strong>Methods: </strong>This exploratory single-center prospective observational study, encompassing 50 patients undergoing dialysis with either the Theranova-400 or FX80 membrane for 6 months, involved monthly tracking of hemoglobin levels, weight-adjusted erythropoiesis-stimulating agent (w-ESA) dosing, and erythropoietin resistance index (ERI), with ESA treatment decisions guided by a proprietary algorithm.</p><p><strong>Results: </strong>The groups were similar in terms of demographics and baseline laboratory test results. The median hemoglobin levels, w-ESA and ERI, were found to be similar between FX80 and Theranova-400 groups at both baseline (11.06 vs 10.57, <i>p</i> = 0.808; 92.3 vs 105.2, <i>p</i> = 0.838; 8.1 vs 10.48, <i>p</i> = 0.876) and the end of the study (11.43 vs 11.03, <i>p</i> = 0.076; 48.7 vs 71.5; 4.48 vs 6.41, <i>p</i> = 0.310), respectively. There was a trend toward lower w-ESA and ERI at the end of the study compared to baseline in both groups, but the difference was non-significant.</p><p><strong>Conclusions: </strong>Based on this study of 50 patients undergoing high-flux dialysis with near-target hemoglobin levels, switching to Theranova 400 dialyzers compared to FX80 dialyzers did not show statistically significant differences in maintaining hemoglobin levels, reducing ESA dose, or lowering ERI. The non-randomized design and small sample size limit the study's power to detect true differences. Larger, randomized trials are needed to confirm findings and definitively assess Theranova 400's benefits.</p>","PeriodicalId":13932,"journal":{"name":"International Journal of Artificial Organs","volume":" ","pages":"260-268"},"PeriodicalIF":1.7,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140059285","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}
Jacopo D'Andria Ursoleo, Marina Pieri, Francesco Calvo, Savino Altizio, Mario Gramegna, Domenico Pontillo, Silvia Ajello, Anna Mara Scandroglio
{"title":"Long-term quality of life, psychological distress, and caregiver burden in octogenarians with LVAD: A single-centre experience.","authors":"Jacopo D'Andria Ursoleo, Marina Pieri, Francesco Calvo, Savino Altizio, Mario Gramegna, Domenico Pontillo, Silvia Ajello, Anna Mara Scandroglio","doi":"10.1177/03913988241239236","DOIUrl":"10.1177/03913988241239236","url":null,"abstract":"<p><p>With the general population aging, both life expectancy and the number of left ventricular assist device (LVAD) implantations in elderly patients are growing. Nevertheless, their perceived long-term quality of life, including psychological aspects, coupled with the respective caregiver's burden, remain under-reported. In light of the rising number of octogenarians with LVAD who necessitate broader healthcare provider involvement, we assessed the long-term quality of life, as defined by both the 36-item short-form health (SF-36) survey and the EuroQol 5 dimensions, 5-level questionnaire (EQ-5D-5L)-including the visual analog scale-in octogenarian LVAD patients who had received treatment at our institution. Additionally, we evaluated the psychological health of octogenarian LVAD patients using the psychological general well-being index (PGWBI), alongside their caregivers' well-being through the 22-item version of the Zarit Burden Interview (ZBI). Of 12 octogenarian LVAD patients, 5 were alive and willing to answer questionnaires. Mean age at implant was 74 ± 2 years. Median follow-up was 2464 (IQR = 2375-2745) days. Although variable, the degree of health and psychological well-being perceived by octogenarian patients with LVAD was \"good.\" Interestingly, the burden of assistance reported by caregivers, though relevant, was greatly varied, suggesting the need to better define and address psychological long-term aspects related to LVAD implantation for both patients and caregivers with a broad-spectrum approach.</p>","PeriodicalId":13932,"journal":{"name":"International Journal of Artificial Organs","volume":" ","pages":"303-308"},"PeriodicalIF":1.7,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11041069/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140193738","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}
{"title":"Thick silk fibroin vascular graft: A promising tissue-engineered scaffold material for abdominal vein grafts in middle-sized mammals.","authors":"Kaito Fukuda, Junichi Kaneko, Sho Kiritani, Yui Sawa, Masaaki Morito, Mariko Tanaka, Tetsuo Ushiku, Chieh-Jen Cheng, Takashi Tanaka, Ryo Tanaka, Tetsuo Asakura, Yoshikuni Kawaguchi, Nobuhisa Akamatsu, Kiyoshi Hasegawa","doi":"10.1177/03913988241234547","DOIUrl":"10.1177/03913988241234547","url":null,"abstract":"<p><p>Abdominal vein replacement with synthetic tissue-engineered vascular grafts constructed from silk-based scaffold material has not been reported in middle-sized mammals. Fourteen canines that underwent caudal vena cava replacement with a silk fibroin (SF) vascular graft (15 mm long and 8 mm diameter) prepared with natural silk biocompatible thread were allocated to two groups, thin and thick SF groups, based on the graft wall thickness. The short-term patency rate and histologic reactions were compared. The patency rate at 2 weeks after replacement in the thin and thick SF groups was 50% and 88%, respectively (<i>p</i> = 0.04). CD31-positive endothelial cells covered the luminal surface of both groups at 4 weeks. The elastic modulus of the thick SF graft was significantly better than that of the thin SF graft (0.0210 and 0.0007 N/m<sup>2</sup>, <i>p</i> < 0.01). Roundness of thick SF groups (<i>o</i> = 0.8 mm) was better than thin SF (<i>o</i> = 2.0 mm). There was significant difference between the groups (<i>p</i> = 0.01). SF vascular grafts are a promising tissue-engineered scaffold material for abdominal venous system replacement in middle-sized mammals, with thick-walled grafts being superior to thin-walled grafts.</p>","PeriodicalId":13932,"journal":{"name":"International Journal of Artificial Organs","volume":" ","pages":"190-197"},"PeriodicalIF":1.7,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139989991","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":"Delayed sternal <i>Mycobacterium tuberculosis</i> infection after left ventricular assist device implantation: A case report.","authors":"Zhihua Wang, Junlong Hu, Zeyuan Zhao, Junjie Sun, Jianchao Li, Xiaoliang Qian, Zhaoyun Cheng","doi":"10.1177/03913988241229957","DOIUrl":"10.1177/03913988241229957","url":null,"abstract":"<p><p>The incidence of <i>Mycobacterium tuberculosis</i> (Mtb) infection in patients with mechanical circulatory support devices is extremely rare. We present a case involving a 38-year-old male who experienced a delayed sternal Mtb infection following left ventricular assist device (LVAD) implantation. More than 5 months post-surgery, the patient was readmitted to the hospital presenting a subxiphoid abscess. The incision site displayed an unsatisfactory healing process after the incision and drainage of the abscess. Despite engaging in a rigorous treatment protocol, which included anti-infective therapy, vacuum-assisted closure, and surgical debridement, the patient's wound remained unhealed. Ultimately, after pus gene sequencing confirmed the diagnosis, the patient was administered a regimen combining anti-tuberculosis and anti-infective therapy, which culminated in the successful healing of the wound. This singular case study not only reveals the clinical progression of an unexpected Mtb infection post-implantation but also emphasizes the challenges encountered in diagnosis and management.</p>","PeriodicalId":13932,"journal":{"name":"International Journal of Artificial Organs","volume":" ","pages":"217-222"},"PeriodicalIF":1.7,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139740959","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}