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Appavu B, Riviello JJ. Multimodal neuromonitoring in the pediatric intensive care unit. Semin Pediatr Neurol 2024; 49:101117. [PMID: 38677796 DOI: 10.1016/j.spen.2024.101117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 01/23/2024] [Accepted: 01/28/2024] [Indexed: 04/29/2024]
Abstract
Neuromonitoring is used to assess the central nervous system in the intensive care unit. The purpose of neuromonitoring is to detect neurologic deterioration and intervene to prevent irreversible nervous system dysfunction. Neuromonitoring starts with the standard neurologic examination, which may lag behind the pathophysiologic changes. Additional modalities including continuous electroencephalography (CEEG), multiple physiologic parameters, and structural neuroimaging may detect changes earlier. Multimodal neuromonitoring now refers to an integrated combination and display of non-invasive and invasive modalities, permitting tailored treatment for the individual patient. This chapter reviews the non-invasive and invasive modalities used in pediatric neurocritical care.
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Affiliation(s)
- Brian Appavu
- Clinical Assistant Professor of Child Health and Neurology, University of Arizona School of Medicine-Phoenix, Barrow Neurological Institute at Phoenix Children's, 1919 E. Thomas Road, Ambulatory Building B, 3rd Floor, Phoenix, AZ 85016, United States.
| | - James J Riviello
- Associate Division Chief for Epilepsy, Neurophysiology, and Neurocritical Care, Division of Pediatric Neurology and Developmental Neuroscience, Department of Pediatrics, Professor of Pediatrics and Neurology, Baylor College of Medicine, Texas Children's Hospital, Houston, TX 77030, United States
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2
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Poletto E, Kanthimathinathan HK, Gyorgyi Z. How to perform and interpret a middle cerebral artery transcranial Doppler examination in children at risk of brain injury. Arch Dis Child Educ Pract Ed 2024; 109:98-104. [PMID: 37532292 DOI: 10.1136/archdischild-2023-325747] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/01/2023] [Indexed: 08/04/2023]
Abstract
Transcranial Doppler (TCD) ultrasound is a non-invasive neuromonitoring technique that falls under the umbrella of point-of-care ultrasound. In this article, we provide a primer to encourage clinicians to perform TCD examinations and to aid them with accurately interpreting the scans. We focus on the middle cerebral artery waveforms and use traumatic brain injury as a model for brain insult.
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Affiliation(s)
- Elisa Poletto
- Division of Pediatric Intensive Care Unit, San Bortolo Hospital of Vicenza, Vicenza, Italy
| | | | - Zoltan Gyorgyi
- Paediatric Critical Care Unit, Royal Hospital for Children and Young People, Edinburgh, UK
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3
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Vinci F, Tiseo M, Colosimo D, Calandrino A, Ramenghi LA, Biasucci DG. Point-of-care brain ultrasound and transcranial doppler or color-coded doppler in critically ill neonates and children. Eur J Pediatr 2024; 183:1059-1072. [PMID: 38112802 DOI: 10.1007/s00431-023-05388-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 12/12/2023] [Accepted: 12/13/2023] [Indexed: 12/21/2023]
Abstract
Point-of-care brain ultrasound and transcranial doppler or color-coded doppler is being increasingly used as an essential diagnostic and monitoring tool at the bedside of critically ill neonates and children. Brain ultrasound has already established as a cornerstone of daily practice in the management of the critically ill newborn for diagnosis and follow-up of the most common brain diseases, considering the easiness to insonate the brain through transfontanellar window. In critically ill children, doppler based techniques are used to assess cerebral hemodynamics in acute brain injury and recommended for screening patients suffering from sickle cell disease at risk for stroke. However, more evidence is needed regarding the accuracy of doppler based techniques for non-invasive estimation of cerebral perfusion pressure and intracranial pressure, as well as regarding the accuracy of brain ultrasound for diagnosis and monitoring of acute brain parenchyma alterations in children. This review is aimed at providing a comprehensive overview for clinicians of the technical, anatomical, and physiological basics for brain ultrasonography and transcranial doppler or color-coded doppler, and of the current status and future perspectives of their clinical applications in critically ill neonates and children. CONCLUSION In critically ill neonates, brain ultrasound for diagnosis and follow-up of the most common cerebral pathologies of the neonatal period may be considered the standard of care. Data are needed about the possible role of doppler techniques for the assessment of cerebral perfusion and vasoreactivity of the critically ill neonate with open fontanelles. In pediatric critical care, doppler based techniques should be routinely adopted to assess and monitor cerebral hemodynamics. New technologies and more evidence are needed to improve the accuracy of brain ultrasound for the assessment of brain parenchyma of critically ill children with fibrous fontanelles. WHAT IS KNOWN • In critically ill neonates, brain ultrasound for early diagnosis and follow-up of the most common cerebral and neurovascular pathologies of the neonatal period is a cornerstone of daily practice. In critically ill children, doppler-based techniques are more routinely used to assess cerebral hemodynamics and autoregulation after acute brain injury and to screen patients at risk for vasospasm or stroke (e.g., sickle cell diseases, right-to-left shunts). WHAT IS NEW • In critically ill neonates, research is currently focusing on the use of novel high frequency probes, even higher than 10 MHz, especially for extremely preterm babies. Furthermore, data are needed about the role of doppler based techniques for the assessment of cerebral perfusion and vasoreactivity of the critically ill neonate with open fontanelles, also integrated with a non-invasive assessment of brain oxygenation. In pediatric critical care, new technologies should be developed to improve the accuracy of brain ultrasound for the assessment of brain parenchyma of critically ill children with fibrous fontanelles. Furthermore, large multicenter studies are needed to clarify role and accuracy of doppler-based techniques to assess cerebral perfusion pressure and its changes after treatment interventions.
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Affiliation(s)
- Francesco Vinci
- Department of Neuroscience, Rehabilitation, Ophtalmology, Genetics, Maternal and Child Health, University of Genoa, Genoa, Italy
- Neonatal Intensive Care Unit, IRCCS Giannina Gaslini Institute, Genoa, Italy
| | - Marco Tiseo
- Intensive Care Unit, 'Tor Vergata' University Hospital, Rome, Italy
| | - Denise Colosimo
- Pediatric Intensive Care Unit, Meyer Children's Hospital IRCCS, Florence, Italy
| | - Andrea Calandrino
- Department of Neuroscience, Rehabilitation, Ophtalmology, Genetics, Maternal and Child Health, University of Genoa, Genoa, Italy
- Neonatal Intensive Care Unit, IRCCS Giannina Gaslini Institute, Genoa, Italy
| | - Luca Antonio Ramenghi
- Department of Neuroscience, Rehabilitation, Ophtalmology, Genetics, Maternal and Child Health, University of Genoa, Genoa, Italy
- Neonatal Intensive Care Unit, IRCCS Giannina Gaslini Institute, Genoa, Italy
| | - Daniele Guerino Biasucci
- Department of Clinical Science and Translational Medicine, 'Tor Vergata' University of Rome, Rome, Italy.
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Lovett ME, MacDonald JM, Mir M, Ghosh S, O'Brien NF, LaRovere KL. Noninvasive Neuromonitoring Modalities in Children Part I: Pupillometry, Near-Infrared Spectroscopy, and Transcranial Doppler Ultrasonography. Neurocrit Care 2024; 40:130-146. [PMID: 37160846 DOI: 10.1007/s12028-023-01730-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 04/03/2023] [Indexed: 05/11/2023]
Abstract
BACKGROUND Noninvasive neuromonitoring in critically ill children includes multiple modalities that all intend to improve our understanding of acute and ongoing brain injury. METHODS In this article, we review basic methods and devices, applications in clinical care and research, and explore potential future directions for three noninvasive neuromonitoring modalities in the pediatric intensive care unit: automated pupillometry, near-infrared spectroscopy, and transcranial Doppler ultrasonography. RESULTS All three technologies are noninvasive, portable, and easily repeatable to allow for serial measurements and trending of data over time. However, a paucity of high-quality data supporting the clinical utility of any of these technologies in critically ill children is currently a major limitation to their widespread application in the pediatric intensive care unit. CONCLUSIONS Future prospective multicenter work addressing major knowledge gaps is necessary to advance the field of pediatric noninvasive neuromonitoring.
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Affiliation(s)
- Marlina E Lovett
- Division of Critical Care Medicine, Department of Pediatrics, Nationwide Children's Hospital and The Ohio State University, Columbus, OH, USA
| | - Jennifer M MacDonald
- Division of Critical Care Medicine, Department of Pediatrics, Nationwide Children's Hospital and The Ohio State University, Columbus, OH, USA
| | - Marina Mir
- Division of Pediatric Critical Care, Montreal Children's Hospital and McGill University, Montreal, Canada
| | - Suman Ghosh
- Department of Neurology, State University of New York Downstate College of Medicine, Brooklyn, NY, USA
| | - Nicole F O'Brien
- Division of Critical Care Medicine, Department of Pediatrics, Nationwide Children's Hospital and The Ohio State University, Columbus, OH, USA
| | - Kerri L LaRovere
- Department of Neurology, Boston Children's Hospital and Harvard Medical School, Boston, MA, USA.
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Figaji A. An update on pediatric traumatic brain injury. Childs Nerv Syst 2023; 39:3071-3081. [PMID: 37801113 PMCID: PMC10643295 DOI: 10.1007/s00381-023-06173-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 09/28/2023] [Indexed: 10/07/2023]
Abstract
INTRODUCTION Traumatic brain injury (TBI) remains the commonest neurological and neurosurgical cause of death and survivor disability among children and young adults. This review summarizes some of the important recent publications that have added to our understanding of the condition and advanced clinical practice. METHODS Targeted review of the literature on various aspects of paediatric TBI over the last 5 years. RESULTS Recent literature has provided new insights into the burden of paediatric TBI and patient outcome across geographical divides and the severity spectrum. Although CT scans remain a standard, rapid sequence MRI without sedation has been increasingly used in the frontline. Advanced MRI sequences are also being used to better understand pathology and to improve prognostication. Various initiatives in paediatric and adult TBI have contributed regionally and internationally to harmonising research efforts in mild and severe TBI. Emerging data on advanced brain monitoring from paediatric studies and extrapolated from adult studies continues to slowly advance our understanding of its role. There has been growing interest in non-invasive monitoring, although the clinical applications remain somewhat unclear. Contributions of the first large scale comparative effectiveness trial have advanced knowledge, especially for the use of hyperosmolar therapies and cerebrospinal fluid drainage in severe paediatric TBI. Finally, the growth of large and even global networks is a welcome development that addresses the limitations of small sample size and generalizability typical of single-centre studies. CONCLUSION Publications in recent years have contributed iteratively to progress in understanding paediatric TBI and how best to manage patients.
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Affiliation(s)
- Anthony Figaji
- Division of Neurosurgery and Neurosciences Institute, University of Cape Town, Cape Town, South Africa.
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Kochar A, Hildebrandt K, Silverstein R, Appavu B. Approaches to neuroprotection in pediatric neurocritical care. World J Crit Care Med 2023; 12:116-129. [PMID: 37397588 PMCID: PMC10308339 DOI: 10.5492/wjccm.v12.i3.116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 03/30/2023] [Accepted: 04/12/2023] [Indexed: 06/08/2023] Open
Abstract
Acute neurologic injuries represent a common cause of morbidity and mortality in children presenting to the pediatric intensive care unit. After primary neurologic insults, there may be cerebral brain tissue that remains at risk of secondary insults, which can lead to worsening neurologic injury and unfavorable outcomes. A fundamental goal of pediatric neurocritical care is to mitigate the impact of secondary neurologic injury and improve neurologic outcomes for critically ill children. This review describes the physiologic framework by which strategies in pediatric neurocritical care are designed to reduce the impact of secondary brain injury and improve functional outcomes. Here, we present current and emerging strategies for optimizing neuroprotective strategies in critically ill children.
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Affiliation(s)
- Angad Kochar
- Department of Neurosciences, Phoenix Children's Hospital, Phoenix, AZ 85213, United States
| | - Kara Hildebrandt
- Department of Neurosciences, Phoenix Children's Hospital, Phoenix, AZ 85213, United States
| | - Rebecca Silverstein
- Department of Neurosciences, Phoenix Children's Hospital, Phoenix, AZ 85213, United States
| | - Brian Appavu
- Department of Neurosciences, Phoenix Children's Hospital, Phoenix, AZ 85213, United States
- Child Health, University of Arizona College of Medicine - Phoenix, Phoenix, AZ 85016, United States
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7
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O'Brien NF, Johnson HC, Musungufu DA, Ekandji RT, Mbaka JP, Babatila LK, Mayindombe L, Giresse B, Mwanza S, Lupumpaula C, Chilima JS, Nanyangwe A, Kabemba P, Kafula LN, Chunda-Liyoka CM, Phiri T, June S, Gushu MB, Chagaluka G, Moons P, Tshimanga T. Transcranial doppler velocities in a large healthy population of African children. Heliyon 2023; 9:e15419. [PMID: 37128324 PMCID: PMC10147980 DOI: 10.1016/j.heliyon.2023.e15419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 04/04/2023] [Accepted: 04/06/2023] [Indexed: 05/03/2023] Open
Abstract
Background and purpose Transcranial doppler ultrasound (TCD) is a tool that diagnoses and monitors pathophysiological changes to the cerebrovasculature. As cerebral blood flow velocities (CBFVs) increase throughout childhood, interpretation of TCD examinations in pediatrics requires comparison to age matched normative data. Large cohorts of healthy children have not been examined to develop these reference values in any population. There is a complete absence of normative values in African children where, due to lack of alternate neuroimaging techniques, utilization of TCD is rapidly emerging. Materials and methods A prospective study of 710 healthy African children 3 months-15 years was performed. Demographics, vital signs, and hemoglobin values were recorded. Participants underwent a complete, non-imaging TCD examination. Systolic (Vs), diastolic (Vd), and mean (Vm) flow velocities and pulsatility index (PI) were calculated by the instrument for each measurement. Results Vs, Vd, and Vm increased through early childhood in all vessels, with the highest CBFVs identified in children 5-5.9 years. There were few significant gender differences in CBFVs in any vessels in any age group. No correlations between blood pressure or hemoglobin and CBFVs were identified. Children in the youngest age groups had CBFVs similar to those previously published, whereas nearly every vessel in children ≥3 years had significantly lower Vs, Vd, and Vm. Conclusions For the first time, reference TCD values for African children are established. Utilization of these CBFVs in the interpretation of TCD examinations in this population will improve the overall accuracy of TCD as a clinical tool on the continent.
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Affiliation(s)
- Nicole F. O'Brien
- Department of Pediatrics, Division of Critical Care Medicine, Nationwide Children's Hospital, The Ohio State University, 700 Children's Drive, Columbus, OH 43502, USA
- Corresponding author.
| | - Hunter C. Johnson
- Department of Pediatrics, Division of Critical Care Medicine, Nationwide Children's Hospital, The Ohio State University, 700 Children's Drive, Columbus, OH 43502, USA
| | | | - Robert Tandjeka Ekandji
- Universite des Sciences et des Technologie de Lodja (USTL), L'Hopital General de Reference de Lodja, Sankuru District, Lodja, People’s Republic of Congo
| | - Jean Pongo Mbaka
- Universite des Sciences et des Technologie de Lodja (USTL), L'Hopital General de Reference de Lodja, Sankuru District, Lodja, People’s Republic of Congo
| | - Lydia Kuseyila Babatila
- Departement de Pediatrie, Cliniques Universitaires de Kinshasa, Hopital Pediatrique de Kalembe Lembe, Universite De Kinshasa, Kimwenza, Lembe, People’s Republic of Congo
| | - Ludovic Mayindombe
- Departement de Pediatrie, Cliniques Universitaires de Kinshasa, Hopital Pediatrique de Kalembe Lembe, Universite De Kinshasa, Kimwenza, Lembe, People’s Republic of Congo
| | - Buba Giresse
- Departement de Pediatrie, Cliniques Universitaires de Kinshasa, Hopital Pediatrique de Kalembe Lembe, Universite De Kinshasa, Kimwenza, Lembe, People’s Republic of Congo
| | - Suzanna Mwanza
- Department of Paediatrics, Chipata Central Hospital, 687 and 588 Hospital Road, Chipata, Zambia
| | - Clement Lupumpaula
- Consultant Radiographer, Chipata Central Hospital, 687 and 588 Hospital Road, Chipata, Zambia
| | - Janet Simanguwa Chilima
- Consultant Radiographer, Chipata Central Hospital, 687 and 588 Hospital Road, Chipata, Zambia
| | - Alice Nanyangwe
- Registered Nurse, University Teaching Hospitals- Children's Hospital P/BAG RW1X, Nationalist Road, Lusaka, Zambia
| | - Peter Kabemba
- Registered Nurse, University Teaching Hospitals- Children's Hospital P/BAG RW1X, Nationalist Road, Lusaka, Zambia
| | - Lisa Nkole Kafula
- Consultant Paediatric Neurologist, University Teaching Hospitals-Children's Hospital, P/BAG RW1X, Nationalist Road, Lusaka, Zambia
| | - Catherine M. Chunda-Liyoka
- Consultant Paediatric Haemotologist, University Teaching Hospitals-Children's Hospital, P/BAG RW1X, Nationalist Road, Lusaka, Zambia
| | - Tusekile Phiri
- TCD Technician, Queen Elizabeth Central Hospital, The Blantyre Malaria Project, Private Bag 360, Chichiri, Blantyre 3, Malawi
| | - Sylvester June
- TCD Technician, Queen Elizabeth Central Hospital, The Blantyre Malaria Project, Private Bag 360, Chichiri, Blantyre 3, Malawi
| | - Montfort Bernard Gushu
- TCD Technician, Queen Elizabeth Central Hospital, The Blantyre Malaria Project, Private Bag 360, Chichiri, Blantyre 3, Malawi
| | - George Chagaluka
- Consultant Paediatrician, Department of Pediatrics and Child Health, Kamuzu University of Health Sciences, Private Bag 360, Chichiri Blantyre 3, Malawi
| | - Peter Moons
- Consultant Paediatrician, Department of Pediatrics and Child Health, Kamuzu University of Health Sciences, Private Bag 360, Chichiri Blantyre 3, Malawi
| | - Taty Tshimanga
- Departement de Pediatrie, Cliniques Universitaires de Kinshasa, Hopital Pediatrique de Kalembe Lembe, Universite De Kinshasa, Kimwenza, Lembe, People’s Republic of Congo
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8
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Weber MD, Lim JKB, Ginsburg S, Conlon T, Nishisaki A. Translating Guidelines into Practical Practice: Point-of-Care Ultrasound for Pediatric Critical Care Clinicians. Crit Care Clin 2023; 39:385-406. [PMID: 36898781 DOI: 10.1016/j.ccc.2022.09.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Point-of-care ultrasound (POCUS) is now transitioning from an emerging technology to a standard of care for critically ill children. POCUS can provide immediate answers to clinical questions impacting management and outcomes within this fragile population. Recently published international guidelines specific to POCUS use in neonatal and pediatric critical care populations now complement previous Society of Critical Care Medicine guidelines. The authors review consensus statements within guidelines, identify important limitations to statements, and provide considerations for the successful implementation of POCUS in the pediatric critical care setting.
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Affiliation(s)
- Mark D Weber
- Division of Critical Care Medicine, Department of Anesthesiology and Critical Care Medicine, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Joel K B Lim
- Children's Intensive Care Unit, Department of Pediatric Subspecialties, KK Women's and Children's Hospital, Singapore
| | - Sarah Ginsburg
- Division of Critical Care Medicine, Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Thomas Conlon
- Division of Critical Care Medicine, Department of Anesthesiology and Critical Care Medicine, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Akira Nishisaki
- Division of Critical Care Medicine, Department of Anesthesiology and Critical Care Medicine, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, PA 19104, USA
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Chang N, Rasmussen L. Exploring Trends in Neuromonitoring Use in a General Pediatric ICU: The Need for Standardized Guidance. CHILDREN (BASEL, SWITZERLAND) 2022; 9:934. [PMID: 35883918 PMCID: PMC9324621 DOI: 10.3390/children9070934] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 06/15/2022] [Accepted: 06/21/2022] [Indexed: 12/26/2022]
Abstract
Neuromonitoring has become more standardized in adult neurocritical care, but the utility of different neuromonitoring modalities in children remains debated. We aimed to describe the use of neuromonitoring in critically ill children with and without primary neurological diseases. We conducted a retrospective review of patients admitted to a 32-bed, non-cardiac PICU during a 12-month period. Neuro-imaging, electroencephalogram (EEG), cerebral oximetry (NIRS), automated pupillometry, transcranial doppler (TCD), intracranial pressure (ICP) monitoring, brain tissue oxygenation (PbtO2), primary diagnosis, and outcome were extracted. Neuromonitoring use by primary diagnosis and associations with outcome were observed. Of 1946 patients, 420 received neuro-imaging or neuromonitoring. Primary non-neurological diagnoses most frequently receiving neuromonitoring were respiratory, hematologic/oncologic, gastrointestinal/liver, and infectious/inflammatory. The most frequently used technologies among non-neurological diagnoses were neuro-imaging, EEG, pupillometry, and NIRS. In the multivariate analysis, pupillometry use was associated with mortality, and EEG, NIRS, and neuro-imaging use were associated with disability. Frequencies of TCD and PbtO2 use were too small for analysis. Neuromonitoring is prevalent among various diagnoses in the PICU, without clear benefit on outcomes when used in an ad hoc fashion. We need standard guidance around who, when, and how neuromonitoring should be applied to improve the care of critically ill children.
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Affiliation(s)
- Nathan Chang
- Pediatric Critical Care Medicine and Neurocritical Care, Lucile Packard Children’s Hospital Stanford, Palo Alto, CA 94304, USA;
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10
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Transcranial Doppler Ultrasound, a Review for the Pediatric Intensivist. CHILDREN 2022; 9:children9050727. [PMID: 35626904 PMCID: PMC9171581 DOI: 10.3390/children9050727] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Revised: 05/11/2022] [Accepted: 05/13/2022] [Indexed: 12/04/2022]
Abstract
The use of transcranial Doppler ultrasound (TCD) is increasing in frequency in the pediatric intensive care unit. This review highlights some of the pertinent TCD applications for the pediatric intensivist, including evaluation of cerebral hemodynamics, autoregulation, non-invasive cerebral perfusion pressure/intracranial pressure estimation, vasospasm screening, and cerebral emboli detection.
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11
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Laws JC, Jordan LC, Pagano LM, Wellons JC, Wolf MS. Multimodal Neurologic Monitoring in Children With Acute Brain Injury. Pediatr Neurol 2022; 129:62-71. [PMID: 35240364 PMCID: PMC8940706 DOI: 10.1016/j.pediatrneurol.2022.01.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 01/04/2022] [Accepted: 01/25/2022] [Indexed: 12/26/2022]
Abstract
Children with acute neurologic illness are at high risk of mortality and long-term neurologic disability. Severe traumatic brain injury, cardiac arrest, stroke, and central nervous system infection are often complicated by cerebral hypoxia, hypoperfusion, and edema, leading to secondary neurologic injury and worse outcome. Owing to the paucity of targeted neuroprotective therapies for these conditions, management emphasizes close physiologic monitoring and supportive care. In this review, we will discuss advanced neurologic monitoring strategies in pediatric acute neurologic illness, emphasizing the physiologic concepts underlying each tool. We will also highlight recent innovations including novel monitoring modalities, and the application of neurologic monitoring in critically ill patients at risk of developing neurologic sequelae.
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Affiliation(s)
- Jennifer C Laws
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Lori C Jordan
- Division of Pediatric Neurology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Lindsay M Pagano
- Division of Pediatric Neurology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - John C Wellons
- Division of Pediatric Neurological Surgery, Department of Neurological Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Michael S Wolf
- Division of Pediatric Critical Care Medicine, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee.
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12
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Burton L, Bhargava V, Kong M. Point-of-Care Ultrasound in the Pediatric Intensive Care Unit. Front Pediatr 2022; 9:830160. [PMID: 35178366 PMCID: PMC8845897 DOI: 10.3389/fped.2021.830160] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 12/29/2021] [Indexed: 12/30/2022] Open
Abstract
Ultrasonography has been widely used in medicine for decades but often by specific users such as cardiologists, obstetricians, and radiologists. In the last several years, the use of this imaging modality has moved to the bedside, with clinicians performing and interpreting focused point of care ultrasonography to aid in immediate assessment and management of their patients. The growth of point of care ultrasonography has been facilitated by advancement in ultrasound-related technology and emerging studies and protocols demonstrating its utility in clinical practice. However, considerable challenges remain before this modality can be adopted across the spectrum of disciplines, primarily as it relates to training, competency, and standardization of usage. This review outlines the history, current state, challenges and the future direction of point of care ultrasonography specifically in the field of pediatric critical care medicine.
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13
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Kirschen MP, LaRovere K, Balakrishnan B, Erklauer J, Francoeur C, Ganesan SL, Jayakar A, Lovett M, Luchette M, Press CA, Wolf M, Ferrazzano P, Wainwright MS, Appavu B. A Survey of Neuromonitoring Practices in North American Pediatric Intensive Care Units. Pediatr Neurol 2022; 126:125-130. [PMID: 34864306 PMCID: PMC9135309 DOI: 10.1016/j.pediatrneurol.2021.11.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 11/06/2021] [Indexed: 12/17/2022]
Abstract
BACKGROUND Neuromonitoring is the use of continuous measures of brain physiology to detect clinically important events in real-time. Neuromonitoring devices can be invasive or non-invasive and are typically used on patients with acute brain injury or at high risk for brain injury. The goal of this study was to characterize neuromonitoring infrastructure and practices in North American pediatric intensive care units (PICUs). METHODS An electronic, web-based survey was distributed to 70 North American institutions participating in the Pediatric Neurocritical Care Research Group. Questions related to the clinical use of neuromonitoring devices, integrative multimodality neuromonitoring capabilities, and neuromonitoring infrastructure were included. Survey results were presented using descriptive statistics. RESULTS The survey was completed by faculty at 74% (52 of 70) of institutions. All 52 institutions measure intracranial pressure and have electroencephalography capability, whereas 87% (45 of 52) use near-infrared spectroscopy and 40% (21/52) use transcranial Doppler. Individual patient monitoring decisions were driven by institutional protocols and collaboration between critical care, neurology, and neurosurgery attendings. Reported device utilization varied by brain injury etiology. Only 15% (eight of 52) of institutions utilized a multimodality neuromonitoring platform to integrate and synchronize data from multiple devices. A database of neuromonitoring patients was maintained at 35% (18 of 52) of institutions. Funding for neuromonitoring programs was variable with contributions from hospitals (19%, 10 of 52), private donations (12%, six of 52), and research funds (12%, six of 52), although 73% (40 of 52) have no dedicated funds. CONCLUSIONS Neuromonitoring indications, devices, and infrastructure vary by institution in North American pediatric critical care units. Noninvasive modalities were utilized more liberally, although not uniformly, than invasive monitoring. Further studies are needed to standardize the acquisition, interpretation, and reporting of clinical neuromonitoring data, and to determine whether neuromonitoring systems impact neurological outcomes.
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Affiliation(s)
- Matthew P Kirschen
- Department of Anesthesiology and Critical Care Medicine, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania.
| | - Kerri LaRovere
- Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Binod Balakrishnan
- Division of Pediatric Critical Care Medicine, Children's Wisconsin, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Jennifer Erklauer
- Departments of Critical Care Medicine and Neurology, Texas Children's Hospital, Houston, Texas
| | - Conall Francoeur
- Department of Pediatrics, CHU de Québec - Université Laval Research Center, Quebec City, Quebec, Canada
| | - Saptharishi Lalgudi Ganesan
- Department of Paediatrics, Children's Hospital of Western Ontario, Schulich School of Medicine & Dentistry at the Western University, London, Ontario, Canada
| | - Anuj Jayakar
- Department of Neurology, Nicklaus Children's Hospital, Miami, Florida
| | - Marlina Lovett
- Division of Critical Care Medicine, Department of Pediatrics, Nationwide Children's Hospital, The Ohio State University College of Medicine, Columbus, Ohio
| | - Matthew Luchette
- Department of Anesthesiology, Critical Care and Pain Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Craig A Press
- Department of Pediatrics, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania; Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado
| | - Michael Wolf
- Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Peter Ferrazzano
- Division of Critical Care Medicine, Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Mark S Wainwright
- Division of Pediatric Neurology, University of Washington School of Medicine, Seattle, Washington
| | - Brian Appavu
- Department of Neurosciences, Barrow Neurological Institute at Phoenix Children's Hospital, University of Arizona College of Medicine - Phoenix, Phoenix, UK
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14
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Millet A, Evain JN, Desrumaux A, Francony G, Bouzat P, Mortamet G. Clinical applications of transcranial Doppler in non-trauma critically ill children: a scoping review. Childs Nerv Syst 2021; 37:2759-2768. [PMID: 34244843 DOI: 10.1007/s00381-021-05282-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 06/29/2021] [Indexed: 01/18/2023]
Abstract
BACKGROUND Many applications of transcranial Doppler (TCD) as a diagnosis or monitoring tool have raised interest in the last decades. It is important that clinicians know when and how to perform TCD in this population, what parameter to assess and monitor and how to interpret it. OBJECTIVE This review aims to describe the emerging clinical applications of TCD in critically ill children excluding those suffering from trauma. METHODS Databases Web of Science, Cochrane and PubMed were searched in May 2020. We considered all publications since the year 2000 addressing the use of TCD as a prognostic, diagnostic or follow-up tool in children aged 0 to 15 years admitted to intensive care or emergency units, excluding neonatology and traumatic brain injury. Two independent reviewers selected 82 abstracts and full-text articles from the 2011 unique citations identified at the outset. RESULTS TCD provides crucial additional information at bedside about cerebrovascular hemodynamics. Many clinical applications include the diagnosis and management of various medical and surgical neurologic conditions (central nervous system infections, arterial ischemic stroke, subarachnoid hemorrhage and vasospasm, brain death, seizures, metabolic disease, hydrocephalus) as well as monitoring the impact systemic conditions on brain perfusion (hemodynamic instability, circulatory assistance). CONCLUSION To conclude, TCD has become an invaluable asset for non-invasive neuromonitoring in critically ill children excluding those suffering from trauma. However, the scope of TCD remains unclearly defined yet and reference values in critically ill children are still lacking.
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Affiliation(s)
- Anne Millet
- Pediatric Intensive Care Unit, Grenoble-Alpes University Hospital, Grenoble, France
| | - Jean-Noël Evain
- Department of Anesthesia and Intensive Care, Grenoble-Alpes University Hospital, Grenoble, France
| | - Amélie Desrumaux
- Pediatric Intensive Care Unit, Grenoble-Alpes University Hospital, Grenoble, France
| | - Gilles Francony
- Department of Anesthesia and Intensive Care, Grenoble-Alpes University Hospital, Grenoble, France
| | - Pierre Bouzat
- Department of Anesthesia and Intensive Care, Grenoble-Alpes University Hospital, Grenoble, France
| | - Guillaume Mortamet
- Pediatric Intensive Care Unit, Grenoble-Alpes University Hospital, Grenoble, France.
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15
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O'Brien NF, Reuter-Rice K, Wainwright MS, Kaplan SL, Appavu B, Erklauer JC, Ghosh S, Kirschen M, Kozak B, Lidsky K, Lovett ME, Mehollin-Ray AR, Miles DK, Press CA, Simon DW, Tasker RC, LaRovere KL. Practice Recommendations for Transcranial Doppler Ultrasonography in Critically Ill Children in the Pediatric Intensive Care Unit: A Multidisciplinary Expert Consensus Statement. J Pediatr Intensive Care 2021; 10:133-142. [PMID: 33884214 PMCID: PMC8052112 DOI: 10.1055/s-0040-1715128] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 06/12/2020] [Indexed: 12/16/2022] Open
Abstract
Transcranial Doppler ultrasonography (TCD) is being used in many pediatric intensive care units (PICUs) to aid in the diagnosis and monitoring of children with known or suspected pathophysiological changes to cerebral hemodynamics. Standardized approaches to scanning protocols, interpretation, and documentation of TCD examinations in this setting are lacking. A panel of multidisciplinary clinicians with expertise in the use of TCD in the PICU undertook a three-round modified Delphi process to reach unanimous agreement on 34 statements and then create practice recommendations for TCD use in the PICU. Use of these recommendations will help to ensure that high quality TCD images are captured, interpreted, and reported using standard nomenclature. Furthermore, use will aid in ensuring reproducible and meaningful study results between TCD practitioners and across PICUs.
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Affiliation(s)
- Nicole Fortier O'Brien
- Department of Pediatrics, Division of Critical Care Medicine, Nationwide Children's Hospital, The Ohio State University, Ohio, United States
| | - Karin Reuter-Rice
- Department of Pediatrics, Division of Pediatric Critical Care, School of Medicine, School of Nursing, Duke University, Duke Institute for Brain Sciences, North Carolina, United States
| | - Mark S. Wainwright
- Department of Neurology, University of Washington, Seattle Children's Hospital, Washington, United States
| | - Summer L. Kaplan
- Department of Radiology, University of Pennsylvania Perelman School of Medicine, The Children's Hospital of Philadelphia, Pennsylvania, United States
| | - Brian Appavu
- Department of Pediatrics, Division of Critical Care Medicine, Barrow Neurological Institute at Phoenix Children's Hospital, University of Arizona College of Medicine—Phoenix, Arizona, United States
| | - Jennifer C. Erklauer
- Department of Pediatrics, Division of Critical Care Medicine and Neurology, Baylor College of Medicine, Texas Children's Hospital, Texas, United States
| | - Suman Ghosh
- Department of Pediatrics, Division of Pediatric Neurology, University of Florida, College of Medicine, Florida, United States
| | - Matthew Kirschen
- Departments of Anesthesiology and Critical Care Medicine, Pediatrics and Neurology, University of Pennsylvania Perelman School of Medicine, The Children's Hospital of Philadelphia, Pennsylvania, United States
| | - Brandi Kozak
- Department of Radiology, Ultrasound Division, Center for Pediatric Contrast Ultrasound, The Children's Hospital of Philadelphia, Pennsylvania, United States
| | - Karen Lidsky
- Department of Pediatrics, Division of Pediatric Critical Care, Wolfson Children's Hospital, University of Florida, Florida, United States
| | - Marlina Elizabeth Lovett
- Department of Pediatrics, Division of Critical Care Medicine, Nationwide Children's Hospital, The Ohio State University, Ohio, United States
| | - Amy R. Mehollin-Ray
- Department of Radiology, Baylor College of Medicine, E.B. Singleton Department of Pediatric Radiology, Texas Children's Hospital, Texas, United States
| | - Darryl K. Miles
- Department of Pediatrics/Division of Critical Care, UT Southwestern Medical Center, Texas, United States
| | - Craig A. Press
- Department of Pediatrics, Section of Child Neurology, University of Colorado, Children's Hospital Colorado, Colorado, United States
| | - Dennis W. Simon
- Department of Critical Care Medicine, University of Pittsburgh School of Medicine, Pennsylvania, United States
| | - Robert C. Tasker
- Departments of Neurology & Anesthesiology, Critical Care and Pain Medicine, Boston Children's Hospital, Harvard Medical School, Massachusetts, United States
| | - Kerri Lynn LaRovere
- Department of Neurology, Boston Children's Hospital, Harvard Medical School, Massachusetts, United States
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16
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Rollet-Cohen V, Sachs P, Léger PL, Merchaoui Z, Rambaud J, Berteloot L, Kossorotoff M, Mortamet G, Dauger S, Tissieres P, Renolleau S, Oualha M. Transcranial Doppler Use in Non-traumatic Critically Ill Children: A Multicentre Descriptive Study. Front Pediatr 2021; 9:609175. [PMID: 34277513 PMCID: PMC8282928 DOI: 10.3389/fped.2021.609175] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 05/31/2021] [Indexed: 01/08/2023] Open
Abstract
Background: The use and perceived value of transcranial Doppler (TCD) scope in paediatric critical care medicine has not been extensively documented. Objective: To describe the use of TCD to assess non-traumatic brain injury in patients admitted to four paediatric intensive care units (PICUs) in France. Methods: We prospectively included all children (aged under 18) assessed with inpatient TCD between November 2014 and October 2015 at one of the four PICUs. The physicians completed a questionnaire within 4 h of performing TCD. Results: 152 children were included. The primary diagnosis was neurological disease in 106 patients (70%), including post ischemic-anoxic brain insult (n = 42, 28%), status epilepticus (n = 19, 13%), and central nervous system infection/inflammation (n = 15, 10%). TCD was the first-line neuromonitoring assessment in 110 patients (72%) and was performed within 24 h of admission in 112 patients (74%). The most common indications for TCD were the routine monitoring of neurological disorders (n = 85, 56%) and the detection of asymptomatic neurological disorders (n = 37, 24). Concordance between the operator's interpretation of TCD and the published normative values was observed for 21 of the 75 (28%) TCD abnormal findings according to the published normative values. The physicians considered that TCD was of value for the ongoing clinical management of 131 (86%) of the 152 patients. Conclusion: TCD is commonly used in French PICUs and tends to be performed early after admission on patients with a broad range of diseases. The physicians reported that the TCD findings often helped their clinical decision making. In view of the subjectivity of bedside interpretation, true TCD contribution to clinical care remains to be determined. Objective studies of the impact of TCD on patient management and clinical outcomes are therefore warranted.
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Affiliation(s)
- Virginie Rollet-Cohen
- Paediatric Intensive Care Unit, Necker-Enfants Malades University Hospital, Assistance Publique des Hôpitaux de Paris, Paris, France
| | - Philippe Sachs
- Paediatric Intensive Care Unit, Robert Debré University Hospital, Assistance Publique des Hôpitaux de Paris, Paris, France
| | - Pierre-Louis Léger
- Paediatric and Neonatal Intensive Care Unit, Trousseau University Hospital, Assistance Publique des Hôpitaux de Paris, Paris, France
| | - Zied Merchaoui
- Pediatric Intensive Care, Paris South University Hospital, Assistance Publique Hôpitaux de Paris, Le Kremlin Bicêtre, Paris, France
| | - Jérôme Rambaud
- Paediatric and Neonatal Intensive Care Unit, Trousseau University Hospital, Assistance Publique des Hôpitaux de Paris, Paris, France
| | - Laureline Berteloot
- Paediatric Radiology Department, Necker-Enfants Malades University Hospital, Assistance Publique des Hôpitaux de Paris, Paris, France
| | - Manoëlle Kossorotoff
- Paediatric Neurology Department, French Centre for Paediatric Stroke, Necker-Enfants-Malades University Hospital, Assistance Publique des Hôpitaux de Paris, Paris, France
| | - Guillaume Mortamet
- Paediatric Intensive Care Unit, Grenoble University Hospital, Grenoble, France
| | - Stéphane Dauger
- Paediatric Intensive Care Unit, Robert Debré University Hospital, Assistance Publique des Hôpitaux de Paris, Paris, France
| | - Pierre Tissieres
- Pediatric Intensive Care, Paris South University Hospital, Assistance Publique Hôpitaux de Paris, Le Kremlin Bicêtre, Paris, France
| | - Sylvain Renolleau
- Paediatric Intensive Care Unit, Necker-Enfants Malades University Hospital, Assistance Publique des Hôpitaux de Paris, Paris, France
| | - Mehdi Oualha
- Paediatric Intensive Care Unit, Necker-Enfants Malades University Hospital, Assistance Publique des Hôpitaux de Paris, Paris, France
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17
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Hakim SM, Abdellatif AA, Ali MI, Ammar MA. Reliability of transcranial sonography for assessment of brain midline shift in adult neurocritical patients: a systematic review and meta-analysis. Minerva Anestesiol 2020; 87:467-475. [PMID: 33054015 DOI: 10.23736/s0375-9393.20.14624-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
INTRODUCTION The aim of this systematic review and meta-analysis was to determine the reliability of transcranial sonography as an alternative to computed tomography for evaluation of brain midline shift in adult neurocritical patients. EVIDENCE AQUISITION The PubMed, EMBASE, Cochrane Library, Scopus and Web of Science databases were searched. Original studies evaluating brain midline shift in adult neurocritical patients using both transcranial sonography and computed tomography were eligible. Primary outcome measure was concordance between both methods as quantified in terms of concordance correlation coefficient. Secondary outcome measure was limits of agreement, defined as mean difference between sonography and computed tomography plus and minus 1.96 standard deviations. EVIDENCE SYNTHESIS Twelve studies (574 patients, 689 examinations) were eligible. Ten studies (416 patients, 492 examinations) provided adequate data for evaluation of concordance. Pooling of effect sizes showed strong concordance between both methods (concordance correlation coefficient, 0.91; 95% CI, 0.87 to 0.94). Two missing studies were imputed and effect size was adjusted to 0.88 (95% CI, 0.81 to 0.93). Nine studies (442 patients, 571 examinations) provided adequate data for estimation of limits of agreement. Pooling of effect sizes showed a bias of -0.53 mm (95% limits of agreement, -1.22 to 0.16 mm). Four missing studies were imputed and bias was adjusted to -0.68 mm (95% limits of agreement, -1.31 to -0.04 mm). CONCLUSIONS Transcranial sonography may serve as reliable alternative to computed tomography for evaluation of brain midline shift in adult neurocritical patients. Both methods have strong concordance with acceptably narrow limits of agreement.
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Affiliation(s)
- Sameh M Hakim
- Department of Anesthesiology and Intensive Care, Faculty of Medicine, Ain Shams University, Cairo, Egypt -
| | - Ayman A Abdellatif
- Department of Anesthesiology and Intensive Care, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Mohammad I Ali
- Department of Intensive Care, King Abdulaziz Hospital, Al-Jouf, Saudi Arabia
| | - Mona A Ammar
- Department of Anesthesiology and Intensive Care, Faculty of Medicine, Ain Shams University, Cairo, Egypt
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19
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Appavu B, Burrows BT, Foldes S, Adelson PD. Approaches to Multimodality Monitoring in Pediatric Traumatic Brain Injury. Front Neurol 2019; 10:1261. [PMID: 32038449 PMCID: PMC6988791 DOI: 10.3389/fneur.2019.01261] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Accepted: 11/13/2019] [Indexed: 02/04/2023] Open
Abstract
Traumatic brain injury (TBI) is a leading cause of morbidity and mortality in children. Improved methods of monitoring real-time cerebral physiology are needed to better understand when secondary brain injury develops and what treatment strategies may alleviate or prevent such injury. In this review, we discuss emerging technologies that exist to better understand intracranial pressure (ICP), cerebral blood flow, metabolism, oxygenation and electrical activity. We also discuss approaches to integrating these data as part of a multimodality monitoring strategy to improve patient care.
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Affiliation(s)
- Brian Appavu
- Barrow Neurological Institute, Phoenix Children's Hospital, Phoenix, AZ, United States.,Department of Child Health, University of Arizona College of Medicine - Phoenix, Phoenix, AZ, United States
| | - Brian T Burrows
- Barrow Neurological Institute, Phoenix Children's Hospital, Phoenix, AZ, United States
| | - Stephen Foldes
- Barrow Neurological Institute, Phoenix Children's Hospital, Phoenix, AZ, United States.,Department of Child Health, University of Arizona College of Medicine - Phoenix, Phoenix, AZ, United States
| | - P David Adelson
- Barrow Neurological Institute, Phoenix Children's Hospital, Phoenix, AZ, United States.,Department of Child Health, University of Arizona College of Medicine - Phoenix, Phoenix, AZ, United States
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