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Shu Y, Wu Z, Yang X, Song M, Ye Y, Zhang C, Yuan Q, Wang L. The burden of epilepsy in the People's Republic of China from 1990 to 2019: epidemiological trends and comparison with the global burden of epilepsy. Front Neurol 2023; 14:1303531. [PMID: 38146443 PMCID: PMC10749336 DOI: 10.3389/fneur.2023.1303531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 11/23/2023] [Indexed: 12/27/2023] Open
Abstract
Background Epilepsy is associated with a significant global burden of disease, affecting over 50 million people worldwide. The specific aim of this study is to compare the burden of epilepsy in the People's Republic of China (PRC) with the global burden, and to analyze the epidemiological trends of epilepsy, the relationship between the burden of epilepsy and social demographic index (SDI), and the relative contributions of epidemiological factors. Methods This is a retrospective population-based study, data were obtained from the Global Burden of Disease (GBD) study in 2019. We employed Joinpoint software and the age-period-cohort (APC) model to analyze epilepsy's epidemiological trends. Health inequality analysis was conducted to investigate the impact of SDI on epilepsy burden. Decomposition analysis was performed to examine the relative contributions of age, population, and epidemiological changes to epilepsy. Results Between 1990 and 2019, the incidence rate in the PRC increased by 45%, significantly surpassing the global incidence of epilepsy. However, Disability-Adjusted Life Years (DALY) decreased notably, and the proportion of Years of Life Lost (YLL) decreased from 62.73 to 39.03%. Concerning incidence, the period Rate Ratio (RR) in the PRC initially increased and then decreased, while the cohort RR in the PRC and globally exhibited a consistent upward trend. In terms of mortality, period RR and cohort RR in the PRC displayed a gradual decrease, with mortality starting higher but eventually falling below the global mortality. The net drifts of incidence were greater than 0, whereas the net drifts of mortality were less than 0, both were lower in the PRC than at the global level. Decomposition analysis indicated that the changes of incidence and mortality in the PRC were mainly attributed to epidemiological changes. Additionally, global disparities in epilepsy decreased, with the burden concentrating in low SDI countries. Conclusion The incidence of epilepsy in the PRC rose during the 30-year study period, while epilepsy mortality decreased. The improved survival rate in the PRC is predominantly attributable to epidemiological changes. The burden of epilepsy in the PRC predominantly affects males, children, and the elderly, Chinese government should focus on specific populations.
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Affiliation(s)
- Yun Shu
- Medical College of Acu-Moxi and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Zhifeng Wu
- Department of Pediatrics, Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Xiaolin Yang
- National Comprehensive Epilepsy Center, Department of Neurosurgery, Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Min Song
- Medical College of Acu-Moxi and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yangyang Ye
- Medical College of Acu-Moxi and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Chunqing Zhang
- National Comprehensive Epilepsy Center, Department of Neurosurgery, Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Qing Yuan
- Medical College of Acu-Moxi and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Li Wang
- Department of Neurology, Second Affiliated Hospital, Army Medical University, Chongqing, China
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Costs and cost-driving factors of acute treatment of status epilepticus in children and adolescents: A cohort study from Germany. Seizure 2022; 97:63-72. [DOI: 10.1016/j.seizure.2022.03.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 02/22/2022] [Accepted: 03/17/2022] [Indexed: 11/17/2022] Open
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Ayvacioglu Cagan C, Sokmen O, Arsava EM, Topcuoglu MA, Dericioglu N. Hospitalization cost in patients with non-convulsive status epilepticus: is it different from other critical care patients? TURKISH JOURNAL OF NEUROLOGY 2022. [DOI: 10.4274/tnd.2022.99233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Jayalakshmi S, Patil A, Challa A, Parekh M, Khandelia H, Vooturi S. Determinants of mortality and long-term outcome in children with refractory and super refractory status epilepticus. J Clin Neurosci 2022; 97:12-16. [PMID: 35030458 DOI: 10.1016/j.jocn.2021.12.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 12/21/2021] [Accepted: 12/23/2021] [Indexed: 10/19/2022]
Abstract
AIM To evaluate factors associated with progression of convulsive refractory status epilepticus(RSE) to super refractory status epilepticus(SRSE) and long term outcome in children. MATERIALS AND METHODS In this open cohort study, data of children admitted with convulsive RSE from 2010 to 2018 was retrospectively analyzed. The outcome at two years was graded according to the Glasgow outcome scale(GOS). RESULTS Fifty six children formed study population, 24 progressed to SRSE. The mean age of the study population was 9.38 ± 4.28(2-16) years. There was no significant difference for age between SRSE and RSE children (9.53 ± 4.50 years vs. 9.17 ± 4.06 years; p = 0.756). Acute symptomatic aetiology was the most common aetiology for RSE (57.1%) and SRSE (54.2%). There were no differences for aetiology between children who progressed to SRSE and those who did not. Mean length of stay in the NICU was 13.54 ± 17.53 days and children who progressed to SRSE had a longer length of stay in NICU (4.78 ± 3.03 days vs. 25.21 ± 21.77 days; p < 0.001). The mortality was 14.2%. Acidosis was more common in children who died (27.1% vs. 87.5%;p < 0.001). There was no significant difference in the mortality between RSE and SRSE (9.4% vs. 20.8%; p = 0.268). At latest follow up 34 (60.7%) children had good outcome. Poor outcome was more common in children who progressed to SRSE(29.4% vs. 63.6%;p < 0.015). CONCLUSION Acute symptomatic etiology is more frequent in children with RSE and SRSE. Progression to SRSE did not significantly increase mortality but associated with poor GOS outcome. Encouragingly, 60% of children had good outcome.
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Affiliation(s)
- Sita Jayalakshmi
- Department of Neurology, Krishna Institute of Medical Sciences, Secunderabad, India.
| | - Anuja Patil
- Department of Neurology, Krishna Institute of Medical Sciences, Secunderabad, India
| | - Anusha Challa
- Department of Neurology, Krishna Institute of Medical Sciences, Secunderabad, India
| | - Mihir Parekh
- Department of Neurology, Krishna Institute of Medical Sciences, Secunderabad, India
| | - Harsh Khandelia
- Department of Neuro-critical Care, Krishna Institute of Medical Sciences, Secunderabad, India
| | - Sudhindra Vooturi
- Department of Neurology, Krishna Institute of Medical Sciences, Secunderabad, India
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Vasquez A, Farias-Moeller R, Sánchez-Fernández I, Abend NS, Amengual-Gual M, Anderson A, Arya R, Brenton JN, Carpenter JL, Chapman K, Clark J, Gaillard WD, Glauser T, Goldstein JL, Goodkin HP, Guerriero RM, Lai YC, McDonough TL, Mikati MA, Morgan LA, Novotny EJ, Ostendorf AP, Payne ET, Peariso K, Piantino J, Riviello JJ, Sands TT, Sannagowdara K, Tasker RC, Tchapyjnikov D, Topjian A, Wainwright MS, Wilfong A, Williams K, Loddenkemper T. Super-Refractory Status Epilepticus in Children: A Retrospective Cohort Study. Pediatr Crit Care Med 2021; 22:e613-e625. [PMID: 34120133 DOI: 10.1097/pcc.0000000000002786] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVES To characterize the pediatric super-refractory status epilepticus population by describing treatment variability in super-refractory status epilepticus patients and comparing relevant clinical characteristics, including outcomes, between super-refractory status epilepticus, and nonsuper-refractory status epilepticus patients. DESIGN Retrospective cohort study with prospectively collected data between June 2011 and January 2019. SETTING Seventeen academic hospitals in the United States. PATIENTS We included patients 1 month to 21 years old presenting with convulsive refractory status epilepticus. We defined super-refractory status epilepticus as continuous or intermittent seizures lasting greater than or equal to 24 hours following initiation of continuous infusion and divided the cohort into super-refractory status epilepticus and nonsuper-refractory status epilepticus groups. INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS We identified 281 patients (157 males) with a median age of 4.1 years (1.3-9.5 yr), including 31 super-refractory status epilepticus patients. Compared with nonsuper-refractory status epilepticus group, super-refractory status epilepticus patients had delayed initiation of first nonbenzodiazepine-antiseizure medication (149 min [55-491.5 min] vs 62 min [33.3-120.8 min]; p = 0.030) and of continuous infusion (495 min [177.5-1,255 min] vs 150 min [90-318.5 min]; p = 0.003); prolonged seizure duration (120 hr [58-368 hr] vs 3 hr [1.4-5.9 hr]; p < 0.001) and length of ICU stay (17 d [9.5-40 d] vs [1.8-8.8 d]; p < 0.001); more medical complications (18/31 [58.1%] vs 55/250 [22.2%] patients; p < 0.001); lower return to baseline function (7/31 [22.6%] vs 182/250 [73.4%] patients; p < 0.001); and higher mortality (4/31 [12.9%] vs 5/250 [2%]; p = 0.010). Within the super-refractory status epilepticus group, status epilepticus resolution was attained with a single continuous infusion in 15 of 31 patients (48.4%), two in 10 of 31 (32.3%), and three or more in six of 31 (19.4%). Most super-refractory status epilepticus patients (30/31, 96.8%) received midazolam as first choice. About 17 of 31 patients (54.8%) received additional treatments. CONCLUSIONS Super-refractory status epilepticus patients had delayed initiation of nonbenzodiazepine antiseizure medication treatment, higher number of medical complications and mortality, and lower return to neurologic baseline than nonsuper-refractory status epilepticus patients, although these associations were not adjusted for potential confounders. Treatment approaches following the first continuous infusion were heterogeneous, reflecting limited information to guide clinical decision-making in super-refractory status epilepticus.
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Affiliation(s)
- Alejandra Vasquez
- Division of Epilepsy and Clinical Neurophysiology, Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, MA
- Division of Child and Adolescent Neurology, Department of Neurology, Mayo Clinic, Rochester, MN
| | - Raquel Farias-Moeller
- Department of Neurology, Division of Pediatric Neurology, Children's Hospital of Wisconsin, Medical College of Wisconsin, Milwaukee, WI
| | - Iván Sánchez-Fernández
- Division of Epilepsy and Clinical Neurophysiology, Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, MA
- Department of Child Neurology, Hospital Sant Joan de Déu, Universidad de Barcelona, Barcelona, Spain
| | - Nicholas S Abend
- Division of Neurology, The Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Marta Amengual-Gual
- Division of Epilepsy and Clinical Neurophysiology, Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, MA
- Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Son Espases, Universitat de les Illes Balears, Palma, Spain
| | - Anne Anderson
- Section of Neurology and Developmental Neuroscience, Department of Pediatrics, Baylor College of Medicine, Houston, TX
| | - Ravindra Arya
- Division of Neurology, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH
| | - James N Brenton
- Department of Neurology and Pediatrics, University of Virginia Health System, Charlottesville, VA
| | - Jessica L Carpenter
- Center for Neuroscience, Children's National Medical Center, George Washington University School of Medicine and Health Sciences, Washington, DC
| | - Kevin Chapman
- Departments of Pediatrics and Neurology, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, CO
| | - Justice Clark
- Division of Epilepsy and Clinical Neurophysiology, Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, MA
| | - William D Gaillard
- Center for Neuroscience, Children's National Medical Center, George Washington University School of Medicine and Health Sciences, Washington, DC
| | - Tracy Glauser
- Division of Neurology, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH
| | - Joshua L Goldstein
- Ruth D. & Ken M. Davee Pediatric Neurocritical Care Program, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Howard P Goodkin
- Department of Neurology and Pediatrics, University of Virginia Health System, Charlottesville, VA
| | - Rejean M Guerriero
- Division of Pediatric Neurology, Washington University Medical Center, Washington University School of Medicine, Saint Louis, MO
| | - Yi-Chen Lai
- Section of Pediatric Critical Medicine, Department of Pediatrics, Baylor College of Medicine, Houston, TX
| | - Tiffani L McDonough
- Division of Child Neurology, Department of Neurology, Columbia University Medical Center, Columbia University, New York, NY
- Division of Pediatric Neurology, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL
| | - Mohamad A Mikati
- Division of Pediatric Neurology, Duke University Medical Center, Duke University, Durham, NC
| | - Lindsey A Morgan
- Department of Neurology, Division of Pediatric Neurology, University of Washington, Seattle, WA
| | - Edward J Novotny
- Department of Neurology, Division of Pediatric Neurology, University of Washington, Seattle, WA
- Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, WA
| | - Adam P Ostendorf
- Department of Pediatrics, Nationwide Children's Hospital, The Ohio State University. Columbus, OH
| | - Eric T Payne
- Division of Child and Adolescent Neurology, Department of Neurology, Mayo Clinic, Rochester, MN
| | - Katrina Peariso
- Division of Neurology, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH
| | - Juan Piantino
- Department of Pediatrics, Division Pediatric Neurology, Neuro-Critical Care Program, Oregon Health and Science University, Portland, OR
| | - James J Riviello
- Section of Neurology and Developmental Neuroscience, Department of Pediatrics, Baylor College of Medicine, Houston, TX
| | - Tristan T Sands
- Division of Child Neurology, Department of Neurology, Columbia University Medical Center, Columbia University, New York, NY
| | - Kumar Sannagowdara
- Department of Neurology, Division of Pediatric Neurology, Children's Hospital of Wisconsin, Medical College of Wisconsin, Milwaukee, WI
| | - Robert C Tasker
- Division of Critical Care, Departments of Neurology, Anesthesiology, Perioperative and Pain Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA
| | - Dmitry Tchapyjnikov
- Division of Pediatric Neurology, Duke University Medical Center, Duke University, Durham, NC
| | - Alexis Topjian
- Critical Care and Pediatrics, The Children's Hospital of Philadelphia, The University of Pennsylvania Perelman School of Medicine, Philadelphia, PA
| | - Mark S Wainwright
- Department of Neurology, Division of Pediatric Neurology, University of Washington, Seattle, WA
| | - Angus Wilfong
- Department of Child Health, University of Arizona College of Medicine and Barrow's Neurological Institute at Phoenix Children's Hospital, Phoenix, AZ
| | - Korwyn Williams
- Department of Child Health, University of Arizona College of Medicine and Barrow's Neurological Institute at Phoenix Children's Hospital, Phoenix, AZ
| | - Tobias Loddenkemper
- Division of Epilepsy and Clinical Neurophysiology, Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, MA
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Wang T, Wang J, Lu G, Ding D, Yan W, Dou Y, Wang B, Zhou Y, Li T, Ma J, Zhou S, Wang Y. Inpatient medical cost of status epilepticus in children: A national-wide, multicenter study from China. Epilepsy Behav 2021; 123:108248. [PMID: 34455296 DOI: 10.1016/j.yebeh.2021.108248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 07/26/2021] [Accepted: 07/27/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVES To describe the inpatient medical cost during hospitalization in children with status epilepticus (SE) and identify factors associated with the cost by a nationwide, multicenter study in China. MATERIALS & METHODS We retrospectively identified pediatric inpatients with SE form Hospital Information System (HIS) of 44 hospitals in 27 provinces in China between 2013 and 2015. Inpatient medical cost and factors associated with the cost were analyzed. RESULTS A total of 4041 children diagnosed with SE with inpatient medical cost were enrolled in the present study. The median age at admission was 2.9 (range 0.1-18) years, and 2271 patients were male (56.2%). The median inpatient medical cost of children with SE was $1175.5 (665.1-2320.6). The median inpatient medical cost was $3865.6 (1837.4-8210.4) in children with SRSE and $1048.6 (619.8-1865.4) in those with N-SRSE (p < 0.0001). Children with length of hospital stay (LOS) > 7 showed a much higher inpatient medical cost than those with LOS ≤ 7 day ($2300.7 vs. $767.2, p < 0.0001). Regarding different etiologies, children with acute symptomatic etiology showed the highest median inpatient medical cost of $1681.1 (901.0-3699.6), in which children with central nervous system (CNS) infection reported $2606.0 (1380.0-5016.1) and prolonged febrile seizures (PFS) reported $909.8 (649.3-1322.0). Additionally, children with idiopathic/cryptogenic etiology reported a medical cost of $923.2 (548.9-1534.5). Multiple linear regression analysis of cost-driving factors revealed LOS > 7, examinations, treatment equipment and procedures, and treatment medicines were independently associated with a higher inpatient medical cost (R2 = 60.91). In addition, PFS and idiopathic/cryptogenic epilepsy etiology were independently associated with a lower cost. CONCLUSIONS SE in children was a cost intensive disease in China with a median inpatient medical cost of $1175.5. LOS, etiology and examinations, treatment equipment and procedures, and treatment medicines were significantly associated with inpatient medical cost.
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Affiliation(s)
- Tianqi Wang
- Department of Neurology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Ji Wang
- Department of Neurology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Guoping Lu
- Pediatric Intensive Care Unit, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Ding Ding
- Institute of Neurology, Huashan Hospital, Fudan University, Shanghai, China
| | - Weili Yan
- Department of Clinical Epidemiology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Yalan Dou
- Department of Clinical Epidemiology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Bo Wang
- Department of Pediatric, Shenzhen Second People's Hospital, Shenzhen, China
| | - Yuanfeng Zhou
- Department of Neurology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Taoli Li
- Department of Neurology, The Children's Hospital of Xi'an City, Xi'an City, China
| | - Jian Ma
- Pediatric Intensive Care Unit, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Shuizhen Zhou
- Department of Neurology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Yi Wang
- Department of Neurology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China.
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Guterman EL, Betjemann JP, Aimetti A, Li JW, Wang Z, Yin D, Hulihan J, Lyons T, Miyasato G, Strzelczyk A. Association Between Treatment Progression, Disease Refractoriness, and Burden of Illness Among Hospitalized Patients With Status Epilepticus. JAMA Neurol 2021; 78:588-595. [PMID: 33818596 DOI: 10.1001/jamaneurol.2021.0520] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Importance Status epilepticus (SE) is associated with poor clinical outcomes and high cost. Increased levels of refractory SE require treatment with additional medications and carry increased morbidity and mortality, but the associations between SE refractoriness, clinical outcomes, and cost remain poorly characterized. Objective To examine differences in clinical outcomes and costs associated with hospitalization for SE of varying refractoriness. Design, Setting, and Participants A cross-sectional study of 43 988 US hospitalizations from January 1, 2016 to December 31, 2018, was conducted, including patients with primary or secondary International Statistical Classification of Diseases, Tenth Revision, diagnosis specifying "with status epilepticus." Exposure Patients were categorized by administration of antiseizure drugs given during hospitalization. Low refractoriness denoted treatment with none or 1 intravenous antiseizure drug. Moderate refractoriness denoted treatment with more than 1 intravenous antiseizure drug. High refractoriness denoted treatment with 1 or more intravenous antiseizure drug, more than 1 intravenous anesthetic, and intensive care unit admission. Main Outcomes and Measures Outcomes included discharge disposition, hospital length of stay, intensive care unit length of stay, hospital-acquired conditions, and cost (total and per diem). Results Among 43 988 hospitalizations for SE, 22 851 patients (51.9%) were male; mean age was 49.9 years (95% CI, 49.7-50.1 years). There were 14 694 admissions (33.4%) for low refractory, 10 140 (23.1%) for moderate refractory, and 19 154 (43.5%) for highly refractory SE. In-hospital mortality was 11.2% overall, with the highest rates among patients with highly (18.9%) compared with moderate (6.3%) and low (4.6%) refractory SE (P < .001 for all comparisons). Median hospital length of stay was 5 days (interquartile range [IQR], 2-10 days) with greater length of stay in highly (8 days; IQR, 4-15 days) compared with moderate (4 days; IQR, 2-8 days) and low (3 days; IQR, 2-5 days) refractory SE (P < .001 for all comparisons). Patients with highly refractory SE also had greater hospital costs, with median costs of $25 105 (mean [SD], $41 858 [$59 063]) in the high, $10 592 (mean [SD], $18 328 [$30 776]) in the moderate, and $6812 (mean [SD], $11 532 [$17 228]) in the low refractory cohorts (P < .001 for all comparisons). Conclusions and Relevance Status epilepticus apparently continues to be associated with a large burden on patients and the US health system, with high mortality and costs that increase with disease refractoriness. Interventions that prevent SE from progressing to a more refractory state may have the potential to improve outcomes and lower costs associated with this neurologic condition.
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Affiliation(s)
- Elan L Guterman
- Department of Neurology, University of California, San Francisco.,Weill Institute for Neurosciences, University of California, San Francisco.,Viewpoint Editor, JAMA Neurology
| | - John P Betjemann
- Department of Neurology, University of California, San Francisco.,Weill Institute for Neurosciences, University of California, San Francisco
| | - Alex Aimetti
- Marinus Pharmaceuticals Inc, Radnor, Pennsylvania
| | - Justin W Li
- Trinity Life Sciences, Waltham, Massachusetts
| | - Zheng Wang
- Trinity Life Sciences, Waltham, Massachusetts
| | - David Yin
- Trinity Life Sciences, Waltham, Massachusetts
| | | | - Thomas Lyons
- Marinus Pharmaceuticals Inc, Radnor, Pennsylvania
| | - Gavin Miyasato
- Trinity Life Sciences, Waltham, Massachusetts.,Formerly Trinity Life Sciences, Waltham, Massachusetts
| | - Adam Strzelczyk
- Department of Neurology, Goethe-University Frankfurt, Frankfurt am Main, Germany
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Learning to Chart Courses Prior to Navigating Stormy Waters: The Urgent Need for a Standardized Roadmap in Status Epilepticus Studies*. Crit Care Med 2020; 48:1904-1906. [DOI: 10.1097/ccm.0000000000004678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Lu M, Faure M, Bergamasco A, Spalding W, Benitez A, Moride Y, Fournier M. Epidemiology of status epilepticus in the United States: A systematic review. Epilepsy Behav 2020; 112:107459. [PMID: 33181886 DOI: 10.1016/j.yebeh.2020.107459] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 08/27/2020] [Accepted: 08/29/2020] [Indexed: 01/08/2023]
Abstract
OBJECTIVES Convulsive status epilepticus (CSE) is a life-threatening neurologic emergency, which is defined by the International League Against Epilepsy (ILAE) as bilateral tonic-clonic seizure activity lasting longer than 5 min, while absence status epilepticus (SE) and focal SE are specified as exceeding 10 min. Epidemiological evidence on SE is currently lacking, and the incidence is not well-known, especially in light of changes in the ILAE criteria for SE. The objectives of this systematic literature review were to describe the epidemiology of SE in the US population and the associated burden of illness. METHODS A systematic review, including literature and pragmatic searches, was conducted. Literature searches were performed using MEDLINE, Embase, BIOSIS, and Web of Science electronic databases from inception to February 2019. Pragmatic searches of the gray literature were carried out using Google, Google Scholar, conference proceedings, and ClinicalTrials.gov to identify additional sources. Only US-based studies or multinational studies reporting US data of interest were included. RESULTS In total, 69 sources were identified. The incidence of all SE in patients of all ages in the USA ranged from 18.3 to 41 per 100,000 people per year. Incidence of all-age CSE rose from 3.5 (1979) to 12.5 (2010) per 100,000 people per year. Status epilepticus incidence followed a bimodal (U-shaped) distribution, with the highest estimates in the first years of life (0-4 years) and after 60 years. Mortality associated with SE varied from 21% over 30 days to 31.2% over 10 years. For CSE, two studies reported similar in-hospital mortalities (9.2% and 10.7%). Median healthcare costs related to SE admission were approximately US$14,500 per adult (17-45 years) and US$8000 per child (0-16 years). CONCLUSIONS There is a lack of recent data on the epidemiology and healthcare burden associated with SE. Reports of SE incidence in the USA are highly variable and predate the 2015 ILAE definition of SE. However, the available data suggest a high burden of illness.
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Affiliation(s)
- Mei Lu
- Shire Development LLC, a Takeda company, Lexington, MA, United States of America.
| | - Mareva Faure
- YOLARX Consultants Inc., Montreal, Quebec, Canada
| | | | - William Spalding
- Shire Development LLC, a Takeda company, Lexington, MA, United States of America
| | - Arturo Benitez
- Shire Development LLC, a Takeda company, Lexington, MA, United States of America
| | - Yola Moride
- YOLARX Consultants Inc., Montreal, Quebec, Canada; YOLARX Consultants SARL, Paris, France; Faculty of Pharmacy, University of Montreal, Montreal, Quebec, Canada; Rutgers, The State University of New Jersey, New Brunswick, NJ, United States of America
| | - Martha Fournier
- Shire Development LLC, a Takeda company, Lexington, MA, United States of America
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García-López B, Gómez-Menéndez AI, Vázquez-Sánchez F, Pérez-Cabo E, Isidro-Mesas F, Zabalegui-Pérez A, Muñoz-Siscart I, Lloria-Gil MC, Soto-Cámara R, González-Bernal JJ, González-Santos J, Aguilar-Parra JM, Trigueros R, López-Liria R, Kjær TW. Electroconvulsive Therapy in Super Refractory Status Epilepticus: Case Series with a Defined Protocol. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E4023. [PMID: 32516983 PMCID: PMC7312395 DOI: 10.3390/ijerph17114023] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 06/02/2020] [Accepted: 06/03/2020] [Indexed: 02/06/2023]
Abstract
Super-refractory status epilepticus (SRSE) represents a neurological emergency that is characterized by a lack of response to the third line of antiepileptic treatment, including intravenous general anesthetics. It is a medical challenge with high morbidity and mortality. Electroconvulsive therapy (ECT) has been recommended as a nonpharmacologic option of treatment after other alternatives are unsuccessful. Its effect on the cessation of SRSE has been minimally investigated. The objective of this article is to analyze the effect of ECT on SRSE. For this purpose, a multidisciplinary team created a protocol based on clinical guidelines similar to those described previously by Ray et al. (2017). ECT was applied to six patients with SRSE after the failure of antiepileptic treatment and pharmacologic coma.The objective of each ECT session was to elicit a motor seizure for at least 20 s. SRSE was resolved in all patients after several days of treatment, including ECT as a therapy, without relevant adverse effects. Thus, ECT is an effective and feasible option in the treatment of SRSE, and its place in the algorithm in treatment should be studied due to the uncommon adverse effects and the noninvasive character of the therapy.
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Affiliation(s)
- Beatriz García-López
- Neurophysiology Department, Burgos University Hospital, 09006 Burgos, Spain; (B.G.-L.); (A.I.G.-M.); (F.I.-M.); (M.C.L.-G.)
| | - Ana Isabel Gómez-Menéndez
- Neurophysiology Department, Burgos University Hospital, 09006 Burgos, Spain; (B.G.-L.); (A.I.G.-M.); (F.I.-M.); (M.C.L.-G.)
| | | | - Eva Pérez-Cabo
- Intensive Care Unit, Burgos University Hospital, 09006 Burgos, Spain; (E.P.-C.); (A.Z.-P.)
| | - Francisco Isidro-Mesas
- Neurophysiology Department, Burgos University Hospital, 09006 Burgos, Spain; (B.G.-L.); (A.I.G.-M.); (F.I.-M.); (M.C.L.-G.)
| | - Arturo Zabalegui-Pérez
- Intensive Care Unit, Burgos University Hospital, 09006 Burgos, Spain; (E.P.-C.); (A.Z.-P.)
| | | | - María Carmen Lloria-Gil
- Neurophysiology Department, Burgos University Hospital, 09006 Burgos, Spain; (B.G.-L.); (A.I.G.-M.); (F.I.-M.); (M.C.L.-G.)
| | - Raúl Soto-Cámara
- Department of Health Sciences, University of Burgos, 09001 Burgos, Spain
| | | | | | - José M. Aguilar-Parra
- Department of Psychology, Health Research Centre, University of Almeria, 04120 Almeria, Spain; (J.M.A.-P.); (R.T.)
| | - Rubén Trigueros
- Department of Psychology, Health Research Centre, University of Almeria, 04120 Almeria, Spain; (J.M.A.-P.); (R.T.)
| | - Remedios López-Liria
- Department of Nursing, Physiotherapy and Medicine, Health Research Centre, University of Almería, 04120 Almeria, Spain;
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11
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Estimating the cost of status epilepticus admissions in the United States of America using ICD-10 codes. Seizure 2019; 71:295-303. [DOI: 10.1016/j.seizure.2019.09.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 08/30/2019] [Accepted: 09/03/2019] [Indexed: 11/20/2022] Open
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12
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Schubert‐Bast S, Zöllner JP, Ansorge S, Hapfelmeier J, Bonthapally V, Eldar‐Lissai A, Rosenow F, Strzelczyk A. Burden and epidemiology of status epilepticus in infants, children, and adolescents: A population‐based study on German health insurance data. Epilepsia 2019; 60:911-920. [DOI: 10.1111/epi.14729] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 03/21/2019] [Accepted: 03/21/2019] [Indexed: 01/08/2023]
Affiliation(s)
- Susanne Schubert‐Bast
- Epilepsy Center Frankfurt Rhine‐Main and Department of Neurology Goethe‐University Frankfurt am Main Germany
- Department of Neuropediatrics Goethe‐University Frankfurt am Main Germany
| | - Johann Philipp Zöllner
- Epilepsy Center Frankfurt Rhine‐Main and Department of Neurology Goethe‐University Frankfurt am Main Germany
| | | | | | | | | | - Felix Rosenow
- Epilepsy Center Frankfurt Rhine‐Main and Department of Neurology Goethe‐University Frankfurt am Main Germany
- Epilepsy Center Hessen and Department of Neurology Philipps‐University Marburg Germany
| | - Adam Strzelczyk
- Epilepsy Center Frankfurt Rhine‐Main and Department of Neurology Goethe‐University Frankfurt am Main Germany
- Epilepsy Center Hessen and Department of Neurology Philipps‐University Marburg Germany
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13
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Muhlhofer WG, Layfield S, Lowenstein D, Lin CP, Johnson RD, Saini S, Szaflarski JP. Duration of therapeutic coma and outcome of refractory status epilepticus. Epilepsia 2019; 60:921-934. [PMID: 30957219 DOI: 10.1111/epi.14706] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 03/09/2019] [Accepted: 03/11/2019] [Indexed: 01/29/2023]
Abstract
OBJECTIVE Examine the association of duration of therapeutic coma (TC) with seizure recurrence, morbidity, and mortality in refractory status epilepticus (RSE). Define an optimal window for TC that provides sustained seizure control and minimizes complications. METHODS Retrospective, observational cohort study involving patients who presented with RSE to the University of Alabama at Birmingham or the University of California at San Francisco from 2010 to 2016. Relationship of duration of TC with primary and secondary outcomes was evaluated using two-sample t tests, simple linear regression, and chi-square tests. Multivariable linear and logistic regression models were used to identify independent predictors. Predictive ability of TC for seizure recurrence was quantified using a receiver-operating characteristic curve. Youden index was used to determine an optimal cutoff value. RESULTS Multivariable analysis of clinical and treatment characteristics of 182 patients who were treated predominantly with propofol as anesthetic agent showed that longer duration of the first trial of TC (27.2 vs 15.6 hours) was independently associated with a higher chance of seizure recurrence following the first weaning attempt (P = 0.038) but not with poor functional neurologic outcome upon discharge, in-hospital complications, or mortality. Furthermore, higher doses of anesthetic utilized during the first trial of TC were independently associated with fewer in-hospital complications (P = 0.003) and associated with a shorter duration of mechanical ventilation and total length of stay. Duration of TC was identified as an independent predictor of seizure recurrence with an optimal cutoff point at 35 hours. SIGNIFICANCE This study suggests that a shorter duration yet deeper TC as treatment for RSE may be more effective and safer than the currently recommended TC duration of 24-48 hours. Prospective and randomized trials should be conducted to validate these assertions.
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Affiliation(s)
- Wolfgang G Muhlhofer
- Department of Neurology/Epilepsy Center, University of Alabama at Birmingham, Birmingham, Alabama
| | - Stephen Layfield
- Department of Neurology, Case Western Reserve University Hospitals, Cleveland, Ohio
| | - Daniel Lowenstein
- Department of Neurology, University of California San Francisco, San Francisco, California
| | - Chee Paul Lin
- Center for Clinical and Translational Science, University of Alabama at Birmingham, Birmingham, Alabama
| | - Robert D Johnson
- Informatics Institute, Center for Clinical and Translational Science, University of Alabama at Birmingham, Birmingham, Alabama
| | - Shalini Saini
- Information Technology Department at School of Medicine Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - Jerzy P Szaflarski
- Department of Neurology/Epilepsy Center, University of Alabama at Birmingham, Birmingham, Alabama
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Abstract
Patients with prolonged seizures that do not respond to intravenous benzodiazepines and a second-line anticonvulsant suffer from refractory status epilepticus and those with seizures that do not respond to continuous intravenous anesthetic anticonvulsants suffer from super-refractory status epilepticus. Both conditions are associated with significant morbidity and mortality. A strict pharmacological treatment regimen is urgently required, but the level of evidence for the available drugs is very low. Refractory complex focal status epilepticus generally does not require anesthetics, but all intravenous non-anesthetizing anticonvulsants may be used. Most descriptive data are available for levetiracetam, phenytoin and valproate. Refractory generalized convulsive status epilepticus is a life-threatening emergency, and long-term clinical consequences are eminent. Administration of intravenous anesthetics is mandatory, and drugs acting at the inhibitory gamma-aminobutyric acid (GABA)A receptor such as midazolam, propofol and thiopental/pentobarbital are recommended without preference for one of those. One in five patients with anesthetic treatment does not respond and has super-refractory status epilepticus. With sustained seizure activity, excitatory N-methyl-d-aspartate (NMDA) receptors are increasingly expressed post-synaptically. Ketamine is an antagonist at this receptor and may prove efficient in some patients at later stages. Neurosteroids such as allopregnanolone increase sensitivity at GABAA receptors; a Phase 1/2 trial demonstrated safety and tolerability, but randomized controlled data failed to demonstrate efficacy. Adjunct ketogenic diet may contribute to termination of difficult-to-treat status epilepticus. Randomized controlled trials are needed to increase evidence for treatment of refractory and super-refractory status epilepticus, but there are multiple obstacles for realization. Hitherto, prospective multicenter registries for pharmacological treatment may help to improve our knowledge.
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Affiliation(s)
- Martin Holtkamp
- Epilepsy-Center Berlin-Brandenburg, Department of Neurology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charitéplatz 1, 10117, Berlin, Germany.
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15
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Arayakarnkul P, Chomtho K. Treatment options in pediatric super-refractory status epilepticus. Brain Dev 2019; 41:359-366. [PMID: 30528076 DOI: 10.1016/j.braindev.2018.11.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 11/26/2018] [Accepted: 11/27/2018] [Indexed: 12/15/2022]
Abstract
BACKGROUND Super-refractory status epilepticus (SRSE) is a seizure that continues >24 h after anesthesia, or recurs on the reduction of anesthesia. SRSE is extremely difficult-to-control and associated with poor outcome. To date, optimal therapy and outcome data in children is limited. OBJECTIVE To assess etiology, treatment options and outcome in pediatric SRSE patients. METHOD We reviewed medical records of children <15 years old with SRSE during 2007-2017 at King Chulalongkorn Memorial Hospital. Demographic data, etiology, treatment, complications and discharge outcome were recorded. RESULTS Seventeen patients, aged 1 month-13 years were included. The leading etiology was immune-mediated encephalitis (29.4%) and epilepsy (29.4%). The most common anesthetic agents were midazolam (94.1%) and propofol (52.9%) with the average maximal dose of 1.3 and 6.9 mg/kg/h respectively. Other treatments included immunological therapy (76.5%), ketogenic diet (76.5%), pyridoxine/pyridoxal-5-phosphate (70.5%). The most common complications were hypotension (61.5%), drug hypersensitivity (32.5%). Median length of anesthetic and intensive care were 9 and 23 days. The mortality rate was 17.6%, and 2 of 3 febrile infection-related epilepsy syndrome cases died. At discharge, all survivors were seizure free. CONCLUSION The majority of pediatric SRSE does not have epilepsy and the etiology is various. Treatment should expand from antiepileptic drugs to other modalities targeting different possible mechanisms such as immunomodulation or specific metabolic treatment. Multiple anesthetic drugs could be tolerated with close monitoring. Ketogenic diet, via enteral or parenteral route, could be considered early if requiring multiple anesthetic drugs. Initial outcome in children is relatively better than in adults.
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Affiliation(s)
| | - Krisnachai Chomtho
- Division of Neurology, Department of Pediatrics, Faculty of Medicine, Chulalongkorn University, Thailand.
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Sánchez Fernández I, Loddenkemper T. Estimating the cost of admissions related to convulsive status epilepticus in the United States of America. Seizure 2018; 61:186-198. [DOI: 10.1016/j.seizure.2018.08.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 07/24/2018] [Accepted: 08/15/2018] [Indexed: 10/28/2022] Open
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17
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Abstract
Status epilepticus (SE) is a medical emergency characterized by uncontrolled, prolonged seizures with rapid and widespread neuronal damage. Patients that suffer from longer episodes of SE are more likely to have poorer clinical outcomes and a higher cost of healthcare. Understanding novel molecular mechanisms that regulate inhibitory and excitatory neurotransmission that initiate SE and the necessary medical infrastructure to stop SE could help identify targets for early intervention. Intranasal administration of benzodiazepines may shorten the time between initiation and cessation of seizures when compared to other routes of administration. Current pharmaceutical administration guidelines are appropriate for sporadic incidences of SE, but exploring other approaches is necessary to prepare for situations involving multiple patients outside of a hospital, such as a massive chemical weapons attack. Intranasal drug delivery helps to circumvent the blood–brain barrier and offers a noninvasive way to quickly administer drugs in settings that require an immediate response, such as nerve agent exposure. In addition, examining the intranasal delivery of new drugs, such as nanotherapeutics, may lead to more effective, noninvasive, scalable, and portable methods of treating SE.
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18
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Willems LM, Kay L, Rosenow F, Strzelczyk A. Krankheitskosten und Outcome: Versorgungsrealität des Status epilepticus. ZEITSCHRIFT FUR EPILEPTOLOGIE 2018. [DOI: 10.1007/s10309-018-0205-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Tiamkao S, Saybungkla P, Sirikarn P, Sawanyawisuth K. Predictors of long-term mortality in status epilepticus. Epilepsy Behav 2018; 84:114-117. [PMID: 29778845 DOI: 10.1016/j.yebeh.2018.04.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 04/26/2018] [Accepted: 04/28/2018] [Indexed: 11/15/2022]
Abstract
BACKGROUND There were several studies that have reported on the long-term mortality rate of status epilepticus (SE). However, these studies were conducted mainly in Western countries using small study populations. This study aimed to evaluate predictors for long-term mortality in SE using the Thai national healthcare database. METHODS This study was conducted using the Thai national Universal Health Coverage (UC) database. The eligibility criteria for this study were that all patients were diagnosed with SE and had been admitted to any hospital between 2005 and 2015. Mortality was defined at discharge and at one, three, five, and 10 years. All eligible patients were categorized as either having survived or having died. The mortality rates were calculated at one, three, five, and 10 years. Factors associated with mortality were analyzed using backward multivariate Cox proportional hazard regression analysis. Kaplan-Meier was performed to estimate the survival rate. RESULTS During the study period, there were 21,732 patients with SE admitted who met the study criteria. The total observation time was 85,821.28 person-years. Of the patients enrolled, 3642 (or 4.24 per 100 person-years [95% confidence interval (CI): 4.11-4.38]) died. Factors positively associated with mortality in patients with SE were central nervous system (CNS) infection, cancer, heart diseases, chronic renal failure, septicemia, pneumonia, respiratory failure, acute renal failure, and shock. Heart diseases had the highest adjusted hazard ratio at 2.69 (95% CI: 2.47-2.93). Two factors were negatively related with SE mortality: hypertension and urinary tract infection. CONCLUSION Long-term mortality in patients with SE had both positive and negative predictors in the national database.
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Affiliation(s)
- Somsak Tiamkao
- Division of Neurology, Department of Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand; Integrated Epilepsy Research Group, Khon Kaen University, Khon Kaen, Thailand.
| | - Pawinee Saybungkla
- Integrated Epilepsy Research Group, Khon Kaen University, Khon Kaen, Thailand; Srinagarind Hospital, Faculty of Medicine, Khon kaen University, Khon Kaen, Thailand
| | - Prapassara Sirikarn
- Srinagarind Hospital, Faculty of Medicine, Khon kaen University, Khon Kaen, Thailand; Program in Epidemiology and Biostatistics, Faculty of Public Health, Khon Kaen University, Thailand
| | - Kittisak Sawanyawisuth
- Department of Medicine and Ambulatory Medicine Research Group, Faculty of Medicine, Khon Kean University, Khon Kaen, Thailand
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- Integrated Epilepsy Research Group, Khon Kaen University, Khon Kaen, Thailand
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Poblete R, Sung G. Status Epilepticus and Beyond: A Clinical Review of Status Epilepticus and an Update on Current Management Strategies in Super-refractory Status Epilepticus. Korean J Crit Care Med 2017; 32:89-105. [PMID: 31723624 PMCID: PMC6786704 DOI: 10.4266/kjccm.2017.00252] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Accepted: 05/05/2017] [Indexed: 12/03/2022] Open
Abstract
Status epilepticus and refractory status epilepticus represent some of the most complex conditions encountered in the neurological intensive care unit. Challenges in management are common as treatment options become limited and prolonged hospital courses are accompanied by complications and worsening patient outcomes. Antiepileptic drug treatments have become increasingly complex. Rational polytherapy should consider the pharmacodynamics and kinetics of medications. When seizures cannot be controlled with medical therapy, alternative treatments, including early surgical evaluation can be considered; however, evidence is limited. This review provides a brief overview of status epilepticus, and a recent update on the management of refractory status epilepticus based on evidence from the literature, evidence-based guidelines, and experiences at our institution.
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Affiliation(s)
- Roy Poblete
- Department of Neurology, Keck School of Medicine of the University of Southern California, Los Angeles, CA, USA
| | - Gene Sung
- Department of Neurology, Keck School of Medicine of the University of Southern California, Los Angeles, CA, USA
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Ketamine for the treatment of (super) refractory status epilepticus? Not quite yet. Expert Rev Neurother 2017; 17:419-421. [PMID: 28128002 DOI: 10.1080/14737175.2017.1288099] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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