Acta anaesthesiologica Belgica最新文献

{"title":"Impact of opioid free Anaesthesia versus opioid Anaesthesia on the immediate postoperative oxygenation after bariatric surgery: a prospective observational study","authors":"Lieselot Geerts, Hugo Carvalho, Eliza Jarahyan, J. Mulier","doi":"10.56126/73.3.15","DOIUrl":"https://doi.org/10.56126/73.3.15","url":null,"abstract":"Introduction: Opioid induced respiratory depression (OIRD) is a preventable aetiology of postoperative respiratory depression with 85% of the episodes taking place in the first 24 postoperative hours. Due to altered respiratory functional metrics and frequently coexisting comorbidities, obese patients are at a particularly higher risk for such complications. The present study aimed to assess if an opioid-free anesthesia (OFA) was associated with a reduced immediate postoperative OIRD when compared to Opiod-based anesthesia (OA).\u0000\u0000Methods: Obese patients presenting for bariatric surgery were consecutively included in a non-randomized fashion. Lung protective ventilation strategies applied in both groups. In the OA group, Sufentanil was used for intraoperative analgesia in a liberal fashion. In the OFA group, patients received a pre-induction dexmedetomidine loading, followed by a lidocaine, ketamine and dexmedetomidine bolus immediately before induction, further maintained throughout the intraoperative period. Plethysmographic saturations were obtained before induction as well as after extubation and in the Post-anesthesia care unit (PACU). Opioid requirement and Postoperative Nausea and Vomiting incidence were similarly registered.\u0000\u0000Results: Thirty-four patients were included in the OFA group, and 30 in the OA group. No significant anthropometric and comorbidity differences were found between both groups. OFA patients had significantly lower pre-induction saturations after dexmedetomidine loading. No difference was found for post-extubation saturations as well as well as pre-PACU discharge. The need for supplemental oxygen at the PACU was higher in the OA group. Opioid requirement and cumulative consumption (MEDs) were significantly higher with OA. Conclusion: OFA was not associated with significant postoperative saturation changes but led to a lower need of postoperative supplemental oxygen therapy. OA led to higher opioid rescue need. No fatal respiratory complications were registered in both groups in the immediate postoperative period.","PeriodicalId":7024,"journal":{"name":"Acta anaesthesiologica Belgica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41783210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Historical vignette – The Mapleson G, an original pediatric anesthesia circuit","authors":"B. Gribomont, B. le Polain de Waroux, F. Veyckemans, B. Ki, Y. Kabré, R. Neighbour, P. Baele","doi":"10.56126/73.3.22","DOIUrl":"https://doi.org/10.56126/73.3.22","url":null,"abstract":"A previously unpublished pediatric anesthesia circuit is presented here. It was invented and constructed by Dr Bernard-François Gribomont (hence called BFG circuit) around 1965 as a response to the important pediatric case load in the university hospital of Lovanium, near Leopoldville (now Kinshasa, DRC). The original objective was to find a simple solution that would enable the manual ventilation (assisted or controlled) of young children during ENT surgery, remaining very close to the child to reduce dead space while at the same time keeping far enough away from the surgeon in order to avoid obstructing their work.\u0000\u0000It includes a short coaxial single piece circuit devoid of any mechanical valve connected to an in-line fresh gas ventilation bag; it does not fit into any existing Mapleson category. Hence, the authors propose to classify it in a new Mapleson G class. Its main advantages are conceptual simplicity, inherent safety, very low dead space accounting for minimal rebreathing and thus reduced fresh gas flow, small size and weight, and ease of use even during prolonged manual ventilation in small children. Its main drawback is difficult scavenging of expired gases. For logistical reasons it was abandoned in the nineties but could be of renewed interest in low-income countries.","PeriodicalId":7024,"journal":{"name":"Acta anaesthesiologica Belgica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47339723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Factors influencing anesthesiologistsperceived usefulness of ACRM (Anaesthesia Crisis Resources Management) key points after a combined ACLS (AHA)-ACRM similation training","authors":"Fabrizio De Biasi, Carlotta Olivei Maddalena, A. Vergallo, G. Fiore, R. Balagna, Paolo Donato, Loris Cristofoli, P. Caironi, F. Marinangeli","doi":"10.56126/73.2.09","DOIUrl":"https://doi.org/10.56126/73.2.09","url":null,"abstract":"Background: The factors that may contribute to learners’ perception about the usefulness of Anaesthesia Crisis Resource Management (ACRM) key points are little known.\u0000\u0000Objectives: We investigated the link between demographic factors and the effect of an ACRM simulation training on anaesthesiologists’ perceived value of ACRM key points.\u0000\u0000Design: A prospective pre- and post-test survey from December 2017 to December 2019 of 111 anaesthesiologists involved into a combined ACRM-ACLS course in a simulation centre.\u0000\u0000Methods: Before and after the course participants were asked to indicate which were, in their opinion, the 5 ACRM key points most relevant for managing an anaesthetic emergency. No taxonomy tool of the 15 ACRM key points was used for teaching purposes.\u0000\u0000Main outcome measures: Pre-/post-course differences in participants’ subjective choices were connected by logistic regression analysis with demographic factors which included age, gender, years of work as anaesthesiologist, the amount of updating exposure, and familiarity with ACRM.\u0000\u0000Results: In median participants (47 M/64 F) had an age of 42 years (IQR 34-55 years), and 10 years working experience as anaesthesiologists (IQR 4-20 years). Around 20% of them had never heard of ACRM prior to this course. Communication was selected by up to 75% of participants without pre-/post-course differences. Although the other 4 ACRM points remained heterogeneously selected even after the course, we observed post-course vs pre-course increase in the selection rate of the ACRM points that address leadership, correct distribution of workload and utilization of all available resources. Among participants’ characteristics, the lack of familiarity with ACRM was the only significant predictor of the number of pre- to post-course changes in ACRM key points selection (OR=3.03, CI 95% 1.04 -9.09; p=0.0418).\u0000\u0000Conclusions: The familiarity with ACRM should be considered when planning ACRM training, especially in cases where the ACRM training is not yet part of a formal education in anaesthesia.","PeriodicalId":7024,"journal":{"name":"Acta anaesthesiologica Belgica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44587827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multicenter international survey on the clinical use of inhaled nitric oxide in the perioperative setting and critically ill patients Survey on inhaled nitric oxide","authors":"K., V. Loon, R., Rossaint, a., Saraçoğlu, n., MaRczin, s., Rex","doi":"10.56126/73.2.10","DOIUrl":"https://doi.org/10.56126/73.2.10","url":null,"abstract":"Background: Inhaled nitric oxide (iNO) is a well-established off-label treatment of acute hypoxic respiratory failure and pulmonary hypertension, but high drug cost and lack of consistent proof of clinical benefit have led to restrictive expert recommendations regarding its use.\u0000\u0000Objectives: To evaluate the current practice of the use of iNO in different hospital settings at an international society level.\u0000\u0000Design & Setting: Web-based survey distributed via email to ESAIC and EACTAIC members.\u0000\u0000Methods: Survey responses are depicted as absolute frequencies and percentages that were analysed using Microsoft Excel.\u0000\u0000Results: One third of the respondents had institutional guidelines for the use of iNO. Pulmonary arterial hypertension, right ventricular failure, persistent pulmonary hypertension of the newborn and adult respiratory distress syndrome were the main indications for treatment with iNO. Prophylactic use of iNO during heart and lung transplantation or VAD implantation surgery was reported by 12-34%. The most frequently reported doses were 10-20 ppm and 20-40 ppm as initial and maximum treatment doses, respectively. Echocardiography was the most universally used form of advanced hemodynamic monitoring during treatment with iNO, followed by pulmonary artery catheterization. Half of the respondents had a fixed strategy to prevent rebound pulmonary hypertension during weaning from iNO, using phosphodiesterase inhibitors, prostacyclins or calcium channel antagonists.\u0000\u0000Conclusion: In line with the available evidence and expert recommendations, iNO remains a rescue treatment reserved for the most severe cases in highly specialized centres. The observations made in this survey should inspire future research to help better define the role of iNO, also in the setting of an ARDS-pandemic and the emergence of alternative selective pulmonary vasodilators.","PeriodicalId":7024,"journal":{"name":"Acta anaesthesiologica Belgica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41967958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The role of methylene blue in the management of vasoplegic syndrome: a narrative review","authors":"J. Cottyn, E. Roussel, S. Rex, L. Al Tmimi","doi":"10.56126/73.2.11","DOIUrl":"https://doi.org/10.56126/73.2.11","url":null,"abstract":"Vasoplegic syndrome is an important clinical entity characterized by profound arterial hypotension refractory to vasopressor therapy. The underlying pathophysiology is characterized by a complex and multifactorial dysregulation of both vasodilatory and vasoconstrictive mechanisms. During the last decades, there is growing interest in using methylene blue as an adjunct therapy to treat vasodilatory shock. The present review evaluates the safety and efficacy of methylene blue in cardiac and transplant surgery, severe sepsis and septic shock, severe burn injury, paediatric intensive care, and intoxications. Although most of the currently available evidence reports a benefit in haemodynamic parameters and a decrease in vasopressor requirements following the administration of methylene blue, study designs are heterogeneous, and the overall level of evidence is low. Moreover, a clear and consistent benefit in morbidity and mortality is lacking. Large prospective randomized controlled trials are needed to evaluate the exact role and timing of methylene blue in the treatment of vasopressor refractory vasoplegia.","PeriodicalId":7024,"journal":{"name":"Acta anaesthesiologica Belgica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41611537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The incidence of early neurological complications after on-pump cardiac surgery: a retrospective study","authors":"J. Houthuys, A. Schrijvers, D. Van Beersel, W. Botermans, L. Al Tmimi","doi":"10.56126/73.2.08","DOIUrl":"https://doi.org/10.56126/73.2.08","url":null,"abstract":"Background: Cardiac surgery with cardiopulmonary bypass (CPB) is associated with a significant risk for neurological complications. Reported incidence and risk factors for these complications vary significantly. Identifying risk factors could lead to preventive strategies to reduce complications and improve patient’s outcome.\u0000\u0000Objective: The study aims to assess the overall incidence and risk factors for severe early postoperative neurological complications after elective on-pump cardiac surgery. We specifically analyzed the incidence of stroke, global cerebral ischemia (GCI) and epilepsy in these patients.\u0000\u0000Methods: After getting approval from the Ethics Committee Research UZ/KU Leuven, on 14/12/2021 (s65871), we retrospectively evaluated data of 1080 adult patients after cardiac surgery with CPB between 06/2019 and 06/2021 at the University Hospitals Leuven. After exclusion of emergency procedures and patients who died before neurological evaluation, 977 patients remained for primary analysis. All data were collected from the electronic patient’s file. Primary objective was to identify the incidence of stroke, GCI and epilepsy. We defined stroke and GCI according to the American Stroke Association. Secondary endpoints were identifying independent risk-factors and assessing the impact of early neurological complications on mortality. Statistical analysis was performed using econometric and statistical modeling with python. We performed univariate logistic regression with Bonferonni correction and multivariable logistic regression with backwards elimination approach and p-value set to be <0.05.\u0000\u0000Results: The overall incidence of defined neurological complications after elective on-pump cardiac surgery at our institution was 3.17% (n=31) (stroke 2.35% (n=23), epilepsy 0.61% (n=6) and GCI 0.31% (n=3)). No statistically significant risk factors for these complications were found. In secondary analysis, patients with stroke and GCI had a higher risk of in-hospital mortality (Fisher’s exact test resulted in odds ratio 7.23 with p=0.005 and odds ratio 65.17 with p=0.003 respectively) Diabetes mellitus, preoperative atrial fibrillation, and endocarditis were also significantly related to in-hospital mortality.\u0000\u0000Conclusions: The incidence of early neurological complications after elective on-pump cardiac surgery at our institution was comparable to that reported in earlier studies. No independent risk factors for these neurological complications were found. The occurrence of stroke and GCI significantly increased in-hospital mortality which emphasizes the importance of these complications, with possible mortality benefit of early recognition and management of stroke.","PeriodicalId":7024,"journal":{"name":"Acta anaesthesiologica Belgica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44133571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The role of tranexamic acid in obstetric hemorrhage: a narrative review","authors":"M. Van Houwe, E. Roofthooft, M. Van de Velde","doi":"10.56126/73.2.12","DOIUrl":"https://doi.org/10.56126/73.2.12","url":null,"abstract":"Abnormal postpartum hemorrhage is a common problem, complicating 3-5% of vaginal and operative deliveries. In a majority of cases (98%) uterine atony, retained placenta or genital tract lacerations are responsible for excessive blood loss. However, occasionally, serious coagulopathy may occur early after delivery or in specific circumstances such as with placental abruption. Also, when bleeding is caused by uterine atony, retained placenta or vaginal lacerations, a dilutional coagulopathy may develop. Hence correcting coagulation abnormalities is often required. Crucial to manage postpartum coagulopathy is the use of tranexamic acid to reduce hyperfibrinolysis. In the present narrative review, we will discuss the use of tranexamic acid for the prevention and management of major postpartum hemorrhage by reviewing the available literature.","PeriodicalId":7024,"journal":{"name":"Acta anaesthesiologica Belgica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47693309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Is the Erector Spinae Plane block useful for anti-nociception and analgesia in lumbar spine surgery? A narrative review of the literature and opinion paper","authors":"G. Tran, N. Vyncke, J. Montupil, V. Bonhomme, A. Defresne","doi":"10.56126/73.2.13","DOIUrl":"https://doi.org/10.56126/73.2.13","url":null,"abstract":"We aimed at determining whether the Erector Spinae Plane (ESP) block is useful for providing anti-nociception and analgesia to patients beneficiating from lumbar spine surgery. Using the keywords “Erector Spinae Plane block” and “lumbar” or “spinal surgery” in Pubmed, the Cochrane Library Database, and Google Scholar (end of search in March 2021), we identified 19 relevant papers involving 534 patients. Injection levels, and type, dilution, or volume of local anesthetic agent solution differed between studies. The main studied outcomes were postoperative pain control, and opioid consumption. Only one study compared the ESP block with another loco- regional technique. All published papers conclude that ESP block reduces postoperative pain scores and rescue medication use. As a corollary, ESP block appears promising in this indication for several reasons. First, it is easy to perform and does not have the same adverse effects or complications as neuraxial techniques. Second, even if the best site of injection as not been determined yet, skin puncture can be performed at distance from the surgical site, hence reducing the risk of surgical site infection by the loco-regional technique, and allowing its use as a rescue analgesic technique after surgery. Last, the incidence of ESP block complications seems low even if the number of studied patients is not wide enough to ascertain this fact for sure. Several unresolved questions are still pending. None of the published studies were randomized controlled trials with a group receiving a sham block, length of follow-up was limited to 48 hours, chronic pain was an exclusion criteria, and the pain scores were evaluated at rest. We conclude that the ESP block appears to be a safe and promising technique to be used as part of a multimodal analgesia protocol in lumbar spine surgery. Several studies are needed to precise its superiority and safety as compared to other techniques, its intraoperative opioid sparing effect, and its influence on longer term outcomes such as the development of chronic pain.","PeriodicalId":7024,"journal":{"name":"Acta anaesthesiologica Belgica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46766127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Breakthrough pain during cesarean section under neuraxial anesthesia: a two-center prospective audit","authors":"E. Roofthooft, N. Lippens, S. Rex, S. Devroe, A. Moerman, N. Filetici, M. Van de Velde","doi":"10.56126/73.1.04","DOIUrl":"https://doi.org/10.56126/73.1.04","url":null,"abstract":"Worldwide, most Cesarean sections (CS) are performed under neuraxial anesthesia. However, neuraxial anesthesia can fail and intraoperative breakthrough pain can occur. The aim of the present investigation was to evaluate the incidence of breakthrough pain in consecutive CS and to describe the potential risk factors for breakthrough pain. In a two center, prospective audit all CS performed under neuraxial anesthesia were included and the occurrence of breakthrough pain as well as all possible risk factors of breakthrough pain were recorded as well as the alternative anesthetic strategy. A total of 393 patients were enrolled in the study over 6 months, 206 in UZ Leuven and 187 in ZNA Middelheim, 295 elective CS and 98 secondary CS. Of all 393 participants, 65 experienced breakthrough pain during the CS (16.5%). Twoo significant risk factors for breakthrough pain during CS were observed: the duration of surgery (p <0.001) and the epidural drug used (p=0.0032). Breakthrough pain during a CS is extremely uncomfortable for the mother. In this observational study, the incidence of breakthrough pain during CS was 16.5%.\u0000\u0000Duration of surgery and epidural drug used were both significant risk factors of breakthrough pain during CS in this audit. A pro-active policy is required in order to prevent breakthrough pain or discomfort during CS. Early identification of problematic epidural catheters for labor analgesia, adequate level of anesthetic block before surgery, and administration of a prophylactic epidural top-up if duration of surgery is prolonged as opposed to the choice of local anesthetic used, could be essential in the prevention. Further high-quality studies are needed to evaluate the many potential risk factors associated with breakthrough pain during CS.","PeriodicalId":7024,"journal":{"name":"Acta anaesthesiologica Belgica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41440957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The well-being of physicians during the COVID-pandemic in a Belgian tertiary hospital","authors":"C. Korthoudt, N. Kegels, A. Domen, G. Moorkens, V. Saldien","doi":"10.56126/73.1.06","DOIUrl":"https://doi.org/10.56126/73.1.06","url":null,"abstract":"Background: COVID-19 has become the largest medical challenge worldwide, affecting the physical and mental well-being of physicians. The aim of this study was to explore the well-being of physicians during the second wave of the COVID-19 outbreak in a Belgian tertiary hospital, with special attention to anaesthesiologists. They were confronted with overcrowded intensive care units, were mentally challenged during several months by an overwhelming workload.\u0000\u0000Methods: All physicians of the Antwerp University Hospital (UZA) were invited to participate through an online anonymous questionnaire to objectively evaluate their well-being during the second wave of the COVID-19 outbreak in Belgium. Mental well-being was evaluated by the validated Warwick-Edinburgh Mental Well-being Scale (WEMWBS) summing 14 equally weighted questions (scoring range 1 to 5) about mental well-being. Demographic data such as age, gender, function, COVID exposure was collected.\u0000\u0000Results: Ninety physicians, 42 residents and 48 staff members, completed the questionnaire with an average WEMWBS of 50.6±8.0. Participating residents were deployed more on COVID-19 departments compared to participating staff members (p=0.02) and reported a higher workload (p=0.001). Residents scored significantly lower on the WEMBWS compared to staff members (48.1±8.2 vs. 52.8±7.3, p=0.01). Also, 15 female anaesthesiologists scored significantly lower in the WEMWBS compared to their 12 male colleagues (p=0.03).\u0000\u0000Conclusion: During the second wave of the COVID-19 outbreak in Belgium, residents reported a significantly higher workload due to COVID-19 and reported a significantly lower well-being compared to staff members.","PeriodicalId":7024,"journal":{"name":"Acta anaesthesiologica Belgica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45896893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}