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Lim JY, Ker CJ, Lai NM, Romantsik O, Fiander M, Tan K. Dexmedetomidine for analgesia and sedation in newborn infants receiving mechanical ventilation. Cochrane Database Syst Rev 2024; 5:CD012361. [PMID: 38695625 PMCID: PMC11064761 DOI: 10.1002/14651858.cd012361.pub2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/05/2024]
Abstract
BACKGROUND Dexmedetomidine is a selective alpha-2 agonist with minimal impact on the haemodynamic profile. It is thought to be safer than morphine or stronger opioids, which are drugs currently used for analgesia and sedation in newborn infants. Dexmedetomidine is increasingly being used in children and infants despite not being licenced for analgesia in this group. OBJECTIVES To determine the overall effectiveness and safety of dexmedetomidine for sedation and analgesia in newborn infants receiving mechanical ventilation compared with other non-opioids, opioids, or placebo. SEARCH METHODS We searched CENTRAL, MEDLINE, Embase, CINAHL, and two trial registries in September 2023. SELECTION CRITERIA We planned to include randomised controlled trials (RCTs) and quasi-RCTs evaluating the effectiveness of dexmedetomidine compared with other non-opioids, opioids, or placebo for sedation and analgesia in neonates (aged under four weeks) requiring mechanical ventilation. DATA COLLECTION AND ANALYSIS We used standard Cochrane methods. Our primary outcomes were level of sedation and level of analgesia. Our secondary outcomes included days on mechanical ventilation, number of infants requiring additional medication for sedation or analgesia (or both), hypotension, neonatal mortality, and neurodevelopmental outcomes. We planned to use GRADE to assess the certainty of evidence for each outcome. MAIN RESULTS We identified no eligible studies for inclusion. We identified four ongoing studies, two of which appear to be eligible for inclusion; they will compare dexmedetomidine with fentanyl in newborn infants requiring surgery. We listed the other two studies as awaiting classification pending assessment of full reports. One study will compare dexmedetomidine with morphine in asphyxiated newborns undergoing hypothermia, and the other (mixed population, age up to three years) will evaluate dexmedetomidine versus ketamine plus dexmedetomidine for echocardiography. The planned sample size of the four studies ranges from 40 to 200 neonates. Data from these studies may provide some evidence for dexmedetomidine efficacy and safety. AUTHORS' CONCLUSIONS Despite the increasing use of dexmedetomidine, there is insufficient evidence supporting its routine use for analgesia and sedation in newborn infants on mechanical ventilation. Furthermore, data on dexmedetomidine safety are scarce, and there are no data available on its long-term effects. Future studies should address the efficacy, safety, and long-term effects of dexmedetomidine as a single drug therapy for sedation and analgesia in newborn infants.
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Affiliation(s)
- Jia Yi Lim
- Department of Paediatrics, Monash University, Melbourne, Australia
| | - Chin Jin Ker
- Department of Paediatrics, Monash University, Melbourne, Australia
| | - Nai Ming Lai
- School of Medicine, Taylor's University, Subang Jaya, Malaysia
| | - Olga Romantsik
- Department of Clinical Sciences Lund, Paediatrics, Lund University, Skåne University Hospital, Lund, Sweden
| | | | - Kenneth Tan
- Department of Paediatrics, Monash University, Melbourne, Australia
- Monash Newborn, Monash Medical Centre, Clayton, Melbourne, Australia
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Moustafa H. EBNEO Commentary: Dexmedetomidine for the management of postoperative pain and sedation in newborns. Acta Paediatr 2023; 112:2254-2255. [PMID: 37452684 DOI: 10.1111/apa.16905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 06/13/2023] [Accepted: 07/06/2023] [Indexed: 07/18/2023]
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Angurana S, William V. Sedation in critically ill mechanically ventilated children: Common though contentious. JOURNAL OF PEDIATRIC CRITICAL CARE 2023. [DOI: 10.4103/jpcc.jpcc_91_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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Smith HAB, Besunder JB, Betters KA, Johnson PN, Srinivasan V, Stormorken A, Farrington E, Golianu B, Godshall AJ, Acinelli L, Almgren C, Bailey CH, Boyd JM, Cisco MJ, Damian M, deAlmeida ML, Fehr J, Fenton KE, Gilliland F, Grant MJC, Howell J, Ruggles CA, Simone S, Su F, Sullivan JE, Tegtmeyer K, Traube C, Williams S, Berkenbosch JW. 2022 Society of Critical Care Medicine Clinical Practice Guidelines on Prevention and Management of Pain, Agitation, Neuromuscular Blockade, and Delirium in Critically Ill Pediatric Patients With Consideration of the ICU Environment and Early Mobility. Pediatr Crit Care Med 2022; 23:e74-e110. [PMID: 35119438 DOI: 10.1097/pcc.0000000000002873] [Citation(s) in RCA: 131] [Impact Index Per Article: 65.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
RATIONALE A guideline that both evaluates current practice and provides recommendations to address sedation, pain, and delirium management with regard for neuromuscular blockade and withdrawal is not currently available. OBJECTIVE To develop comprehensive clinical practice guidelines for critically ill infants and children, with specific attention to seven domains of care including pain, sedation/agitation, iatrogenic withdrawal, neuromuscular blockade, delirium, PICU environment, and early mobility. DESIGN The Society of Critical Care Medicine Pediatric Pain, Agitation, Neuromuscular Blockade, and Delirium in critically ill pediatric patients with consideration of the PICU Environment and Early Mobility Guideline Taskforce was comprised of 29 national experts who collaborated from 2009 to 2021 via teleconference and/or e-mail at least monthly for planning, literature review, and guideline development, revision, and approval. The full taskforce gathered annually in-person during the Society of Critical Care Medicine Congress for progress reports and further strategizing with the final face-to-face meeting occurring in February 2020. Throughout this process, the Society of Critical Care Medicine standard operating procedures Manual for Guidelines development was adhered to. METHODS Taskforce content experts separated into subgroups addressing pain/analgesia, sedation, tolerance/iatrogenic withdrawal, neuromuscular blockade, delirium, PICU environment (family presence and sleep hygiene), and early mobility. Subgroups created descriptive and actionable Population, Intervention, Comparison, and Outcome questions. An experienced medical information specialist developed search strategies to identify relevant literature between January 1990 and January 2020. Subgroups reviewed literature, determined quality of evidence, and formulated recommendations classified as "strong" with "we recommend" or "conditional" with "we suggest." Good practice statements were used when indirect evidence supported benefit with no or minimal risk. Evidence gaps were noted. Initial recommendations were reviewed by each subgroup and revised as deemed necessary prior to being disseminated for voting by the full taskforce. Individuals who had an overt or potential conflict of interest abstained from relevant votes. Expert opinion alone was not used in substitution for a lack of evidence. RESULTS The Pediatric Pain, Agitation, Neuromuscular Blockade, and Delirium in critically ill pediatric patients with consideration of the PICU Environment and Early Mobility taskforce issued 44 recommendations (14 strong and 30 conditional) and five good practice statements. CONCLUSIONS The current guidelines represent a comprehensive list of practical clinical recommendations for the assessment, prevention, and management of key aspects for the comprehensive critical care of infants and children. Main areas of focus included 1) need for the routine monitoring of pain, agitation, withdrawal, and delirium using validated tools, 2) enhanced use of protocolized sedation and analgesia, and 3) recognition of the importance of nonpharmacologic interventions for enhancing patient comfort and comprehensive care provision.
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Affiliation(s)
- Heidi A B Smith
- Department of Pediatrics, Monroe Carell Jr Children's Hospital at Vanderbilt, Vanderbilt University Medical Center, Nashville, TN
- Division of Pediatric Cardiac Anesthesiology, Vanderbilt University Medical Center, Department of Anesthesiology, Nashville, TN
| | - James B Besunder
- Division of Pediatric Critical Care, Akron Children's Hospital, Akron, OH
- Department of Pediatrics, Northeast Ohio Medical University, Akron, OH
| | - Kristina A Betters
- Department of Pediatrics, Monroe Carell Jr Children's Hospital at Vanderbilt, Vanderbilt University Medical Center, Nashville, TN
| | - Peter N Johnson
- University of Oklahoma College of Pharmacy, Oklahoma City, OK
- The Children's Hospital at OU Medical Center, Oklahoma City, OK
| | - Vijay Srinivasan
- Departments of Anesthesiology, Critical Care, and Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
- Department of Anesthesiology and Critical Care Medicine, The Children's Hospital of Philadelphia, Philadelphia, PA
| | - Anne Stormorken
- Pediatric Critical Care, Rainbow Babies Children's Hospital, Cleveland, OH
- Department of Pediatrics, Case Western Reserve University, Cleveland, OH
| | - Elizabeth Farrington
- Betty H. Cameron Women's and Children's Hospital at New Hanover Regional Medical Center, Wilmington, NC
| | - Brenda Golianu
- Division of Pediatric Anesthesia and Pain Management, Department of Anesthesiology, Lucile Packard Children's Hospital, Palo Alto, CA
- Department of Anesthesiology, Stanford University School of Medicine, Palo Alto, CA
| | - Aaron J Godshall
- Department of Pediatrics, AdventHealth For Children, Orlando, FL
| | - Larkin Acinelli
- Division of Critical Care Medicine, Johns Hopkins All Children's Hospital, St Petersburg, FL
| | - Christina Almgren
- Lucile Packard Children's Hospital Stanford Pain Management, Palo Alto, CA
| | | | - Jenny M Boyd
- Division of Pediatric Critical Care, N.C. Children's Hospital, Chapel Hill, NC
- Division of Pediatric Critical Care, University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - Michael J Cisco
- Division of Pediatric Critical Care Medicine, UCSF Benioff Children's Hospital San Francisco, San Francisco, CA
| | - Mihaela Damian
- Lucile Packard Children's Hospital Stanford at Stanford Children's Health, Palo Alto, CA
- Division of Pediatric Critical Care Medicine, Stanford University School of Medicine, Palo Alto, CA
| | - Mary L deAlmeida
- Children's Healthcare of Atlanta at Egleston, Atlanta, GA
- Division of Pediatric Critical Care, Emory University School of Medicine, Atlanta, GA
| | - James Fehr
- Department of Anesthesiology, Stanford University School of Medicine, Palo Alto, CA
- Department of Anesthesiology, Lucile Packard Children's Hospital, Palo Alto, CA
| | | | - Frances Gilliland
- Division of Cardiac Critical Care, Johns Hopkins All Children's Hospital, St Petersburg, FL
- College of Nursing, University of South Florida, Tampa, FL
| | - Mary Jo C Grant
- Primary Children's Hospital, Pediatric Critical Care Services, Salt Lake City, UT
| | - Joy Howell
- Division of Pediatric Critical Care Medicine, Department of Pediatrics, Weill Cornell Medical College, New York, NY
| | | | - Shari Simone
- University of Maryland School of Nursing, Baltimore, MD
- Pediatric Intensive Care Unit, University of Maryland Medical Center, Baltimore, MD
| | - Felice Su
- Lucile Packard Children's Hospital Stanford at Stanford Children's Health, Palo Alto, CA
- Division of Pediatric Critical Care Medicine, Stanford University School of Medicine, Palo Alto, CA
| | - Janice E Sullivan
- "Just For Kids" Critical Care Center, Norton Children's Hospital, Louisville, KY
- Division of Pediatric Critical Care, University of Louisville School of Medicine, Louisville, KY
| | - Ken Tegtmeyer
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH
- Division of Critical Care Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Chani Traube
- Division of Pediatric Critical Care Medicine, Department of Pediatrics, Weill Cornell Medical College, New York, NY
| | - Stacey Williams
- Division of Pediatric Critical Care, Monroe Carell Jr Children's Hospital at Vanderbilt, Nashville, TN
| | - John W Berkenbosch
- "Just For Kids" Critical Care Center, Norton Children's Hospital, Louisville, KY
- Division of Pediatric Critical Care, University of Louisville School of Medicine, Louisville, KY
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Wang Q, Chen C, Wang L. Efficacy and safety of dexmedetomidine in maintaining hemodynamic stability in pediatric cardiac surgery: a systematic review and meta-analysis. J Pediatr (Rio J) 2022; 98:15-25. [PMID: 34252370 PMCID: PMC9432289 DOI: 10.1016/j.jped.2021.05.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 05/23/2021] [Accepted: 05/24/2021] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVES Dexmedetomidine (DEX) is a highly selective alpha-2 adrenergic receptor agonist, which is the main sedative in the intensive care unit. This study aims to investigate the effectiveness and adverse events of DEX in maintaining hemodynamic stability in pediatric cardiac surgery. SOURCES Databases such as PubMed, Cochrane, Web of Science, WANFANG STATA and China National Knowledge Infrastructure were searched for articles about the application of DEX in maintaining hemodynamic stability during and after pediatric cardiac surgery up to 18th Feb. 2021. Only randomized controlled trials were included and random-effects model meta-analysis was applied to calculate the standardized mean deviation (SMD), odds ratio (OR) and 95% confidence interval (CI). SUMMARY OF THE FINDINGS Fifteen articles were included for this meta-analysis, and 9 articles for qualitative analysis. The results showed that preoperative prophylaxis and postoperative recovery of DEX in pediatric patients undergoing cardiac surgery were effective in maintaining systolic blood pressure (SBP), mean arterial pressure (MAP), diastolic blood pressure (DBP) and reducing heart rate (HR) (SBP: SMD = -0.35,95% CI: -0.72, 0.01; MAP: SMD = -0.83, 95% CI: -1.87,0.21; DBP: SMD = -0.79,95% CI: -1.66,0.08; HR: SMD = -1.71,95% CI: -2.29, -1.13). In addition, the frequency of Junctional Ectopic Tachycardia in the DEX treatment group was lower than that in the placebo group. CONCLUSIONS The application of DEX for preoperative prophylaxis and postoperative recovery in pediatric cardiac surgery patients are effective in maintaining hemodynamic stability, and the clinical dose of DEX is not significantly related to the occurrence of pediatric adverse events which may be related to individual differences.
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Affiliation(s)
- Qing Wang
- Hainan Women and Children's Medical Center, Department of Anesthesiology, Haikou, China
| | - Chuikai Chen
- Hainan Women and Children's Medical Center, Department of Anesthesiology, Haikou, China
| | - Li Wang
- The First Hospital of Hebei Medical University, Department of Anesthesiology, Shijiazhuang, China.
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Lee JJ, Price JC, Gewandter J, Kleykamp BA, Biagas KV, Naim MY, Ward D, Dworkin RH, Sun LS. Design and reporting characteristics of clinical trials investigating sedation practices in the paediatric intensive care unit: a scoping review by SCEPTER (Sedation Consortium on Endpoints and Procedures for Treatment, Education and Research). BMJ Open 2021; 11:e053519. [PMID: 34649849 PMCID: PMC8522672 DOI: 10.1136/bmjopen-2021-053519] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
OBJECTIVES To conduct a scoping review of sedation clinical trials in the paediatric intensive care setting and summarise key methodological elements. DESIGN Scoping review. DATA SOURCES PubMed, Embase, Cumulative Index to Nursing and Allied Health Literature and grey references including ClinicalTrials.gov from database inception to 3 August 2021. STUDY SELECTION All human trials in the English language related to sedation in paediatric critically ill patients were included. After title and abstract screening, full-text review was performed. 29 trials were eligible for final analysis. DATA EXTRACTION A coding manual was developed and pretested. Trial characteristics were double extracted. RESULTS The majority of trials were single centre (22/29, 75.9%), parallel group superiority (17/29, 58.6%), double-blinded (18/29, 62.1%) and conducted in an academic setting (29/29, 100.0%). Trial enrolment (≥90% planned sample size) was achieved in 65.5% of trials (19/29), and retention (≥90% enrolled subjects) in 72.4% of trials (21/29). Protocol violations were reported in nine trials (31.0%). The most commonly studied cohorts were mechanically ventilated patients (28/29, 96.6%) and postsurgical patients (11/29, 37.9%) with inclusion criteria for age ranging from 0±0.5 to 15.0±7.3 years (median±IQR). The median age of enrolled patients was 1.7 years (IQR=4.4 years). Patients excluded from trials were those with neurological impairment (21/29, 72.4%), complex disease (20/29, 69.0%) or receipt of neuromuscular blockade (10/29, 34.5%). Trials evaluated drugs/protocols for sedation management (20/29, 69.0%), weaning (3/29, 10.3%), daily interruption (3/29, 10.3%) or protocolisation (3/29, 10.3%). Primary outcome measures were heterogeneous, as were assessment instruments and follow-up durations. CONCLUSIONS There is substantial heterogeneity in methodological approach in clinical trials evaluating sedation in critically ill paediatric patients. These results provide a basis for the design of future clinical trials to improve the quality of trial data and aid in the development of sedation-related clinical guidelines.
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Affiliation(s)
| | - Jerri C Price
- Anesthesiology, Columbia University Irving Medical Center, New York, New York, USA
| | - Jennifer Gewandter
- Anesthesiology and Perioperative Medicine, University of Rochester Medical Center, Rochester, New York, USA
| | - Bethea A Kleykamp
- Anesthesiology and Perioperative Medicine, University of Rochester Medical Center, Rochester, New York, USA
| | - Katherine V Biagas
- Pediatrics, Stony Brook University Renaissance School of Medicine, Stony Brook, New York, USA
| | - Maryam Y Naim
- Anesthesiology, Critical Care and Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Denham Ward
- Anesthesiology and Perioperative Medicine, University of Rochester Medical Center, Rochester, New York, USA
| | - Robert H Dworkin
- Anesthesiology and Perioperative Medicine, University of Rochester Medical Center, Rochester, New York, USA
| | - Lena S Sun
- Anesthesiology and Pediatrics, Columbia University Irving Medical Center, New York, New York, USA
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Abstract
BACKGROUND Targeted drug development efforts in patients with CHD are needed to standardise care, improve outcomes, and limit adverse events in the post-operative period. To identify major gaps in knowledge that can be addressed by drug development efforts and provide a rationale for current clinical practice, this review evaluates the evidence behind the most common medication classes used in the post-operative care of children with CHD undergoing cardiac surgery with cardiopulmonary bypass. METHODS We systematically searched PubMed and EMBASE from 2000 to 2019 using a controlled vocabulary and keywords related to diuretics, vasoactives, sedatives, analgesics, pulmonary vasodilators, coagulation system medications, antiarrhythmics, steroids, and other endocrine drugs. We included studies of drugs given post-operatively to children with CHD undergoing repair or palliation with cardiopulmonary bypass. RESULTS We identified a total of 127 studies with 51,573 total children across medication classes. Most studies were retrospective cohorts at single centres. There is significant age- and disease-related variability in drug disposition, efficacy, and safety. CONCLUSION In this study, we discovered major gaps in knowledge for each medication class and identified areas for future research. Advances in data collection through electronic health records, novel trial methods, and collaboration can aid drug development efforts in standardising care, improving outcomes, and limiting adverse events in the post-operative period.
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Gulla KM, Sankar J, Jat KR, Kabra SK, Lodha R. Dexmedetomidine vs Midazolam for Sedation in Mechanically Ventilated Children: A Randomized Controlled Trial. Indian Pediatr 2021. [DOI: 10.1007/s13312-021-2124-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Dexmedetomidine Sedation in Mechanically Ventilated Critically Ill Children: A Pilot Randomized Controlled Trial. Pediatr Crit Care Med 2020; 21:e731-e739. [PMID: 32740192 DOI: 10.1097/pcc.0000000000002483] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
OBJECTIVES To assess the feasibility, safety, and efficacy of a sedation protocol using dexmedetomidine as the primary sedative in mechanically ventilated critically ill children. DESIGN Open-label, pilot, prospective, multicenter, randomized, controlled trial. The primary outcome was the proportion of sedation scores in the target sedation range in the first 48 hours. Safety outcomes included device removal, adverse events, and vasopressor use. Feasibility outcomes included time to randomization and protocol fidelity. SETTING Six tertiary PICUs in Australia and New Zealand. PATIENTS Critically ill children, younger than 16 years old, requiring intubation and mechanical ventilation and expected to be mechanically ventilated for at least 24 hours. INTERVENTIONS Children randomized to dexmedetomidine received a dexmedetomidine-based algorithm targeted to light sedation (State Behavioral Scale -1 to +1). Children randomized to usual care received sedation as determined by the treating clinician (but not dexmedetomidine), also targeted to light sedation. MEASUREMENTS AND MAIN RESULTS Sedation with dexmedetomidine as the primary sedative resulted in a greater proportion of sedation measurements in the light sedation range (State Behavioral Scale -1 to +1) over the first 48 hours (229/325 [71%] vs 181/331 [58%]; p = 0.04) and the first 24 hours (66/103 [64%] vs 48/116 [41%]; p < 0.001) compared with usual care. Cumulative midazolam dosage was significantly reduced in the dexmedetomidine arm compared with usual care (p = 0.002).There were more episodes of hypotension and bradycardia with dexmedetomidine (including one serious adverse event) but no difference in vasopressor requirements. Median time to randomization after intubation was 6.0 hours (interquartile range, 2.0-9.0 hr) in the dexmedetomidine arm compared with 3.0 hours (interquartile range, 1.0-7.0 hr) in the usual care arm (p = 0.24). CONCLUSIONS A sedation protocol using dexmedetomidine as the primary sedative was feasible, appeared safe, achieved early, light sedation, and reduced midazolam requirements. The findings of this pilot study justify further studies of sedative agents in critically ill children.
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The Effectiveness of α2 Agonists As Sedatives in Pediatric Critical Care: A Propensity Score-Matched Cohort Study. Crit Care Med 2020; 47:e580-e586. [PMID: 31033500 DOI: 10.1097/ccm.0000000000003789] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVES There is limited evidence supporting the widespread use of α2 agonists (clonidine and dexmedetomidine) in pediatric critical care sedation. This study sought to test the association between the use of α2 agonists and enhanced sedation. DESIGN A retrospective observational cohort study was conducted. Noninferiority of time adequately sedated (COMFORT Behavior Score 11-16) while mechanically ventilated was assessed. Secondarily, dosing of opioids and benzodiazepines was examined. SETTING Two tertiary PICUs. PATIENTS Children were classified into an exposed group, who received an α2 agonist as part of their sedation regimen, and an unexposed group. Groups were matched using propensity score analysis. INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS One-thousand eighty-five patients were included. The exposed group were adequately sedated 74% (95% CI, 72-75%) of the study time compared with the unexposed group at 70% (95% CI, 67-72%) giving a ratio of 1.06 (95% CI, 1.02-1.10) and a noninferior time adequately sedated. A decrease in time oversedated was observed with 8.1% (95% CI, 4.3-11.9%) less time classified as oversedated in the exposed group. Reduction in morphine use of 0.25 μg/kg/hr (95% CI, -0.68 to 1.18 μg/kg/hr) was not statistically significant. Midazolam use did not decrease and was statistically higher. CONCLUSIONS Use of α2 agonists was associated with similar time adequately sedated as a matched unexposed group although no reduction in morphine or benzodiazepine coadministration was observed. There was a shift toward lighter sedation with α2 agonist use.
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Poonai N, Spohn J, Vandermeer B, Ali S, Bhatt M, Hendrikx S, Trottier ED, Sabhaney V, Shah A, Joubert G, Hartling L. Intranasal Dexmedetomidine for Procedural Distress in Children: A Systematic Review. Pediatrics 2020; 145:peds.2019-1623. [PMID: 31862730 DOI: 10.1542/peds.2019-1623] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/21/2019] [Indexed: 11/24/2022] Open
Abstract
CONTEXT Intranasal dexmedetomidine (IND) is an emerging agent for procedural distress in children. OBJECTIVE To explore the effectiveness of IND for procedural distress in children. DATA SOURCES We performed electronic searches of Medline (1946-2019), Embase (1980-2019), Google Scholar (2019), Cumulative Index to Nursing and Allied Health Literature (1981-2019), and Cochrane Central Register. STUDY SELECTION We included randomized trials of IND for procedures in children. DATA EXTRACTION Methodologic quality of evidence was evaluated by using the Cochrane Collaboration's risk of bias tool and the Grading of Recommendations Assessment, Development, and Evaluation system, respectively. The primary outcome was the proportion of participants with adequate sedation. RESULTS Among 19 trials (N = 2137), IND was superior to oral chloral hydrate (3 trials), oral midazolam (1 trial), intranasal midazolam (1 trial), and oral dexmedetomidine (1 trial). IND was equivalent to oral chloral hydrate (2 trials), intranasal midazolam (2 trials), and intranasal ketamine (3 trials). IND was inferior to oral ketamine and a combination of IND plus oral ketamine (1 trial). Higher doses of IND were superior to lower doses (4 trials). Adverse effects were reported in 67 of 727 (9.2%) participants in the IND versus 98 of 591 (16.6%) in the comparator group. There were no reports of adverse events requiring resuscitative measures. LIMITATIONS The adequacy of sedation was subjective, which possibly led to biased outcome reporting. CONCLUSIONS Given the methodologic limitations of included trials, IND is likely more effective at sedating children compared to oral chloral hydrate and oral midazolam. However, this must be weighed against the potential for adverse cardiovascular effects.
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Affiliation(s)
- Naveen Poonai
- Department of Pediatrics, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada; .,Division of Emergency Medicine and.,Children's Health Research Institute, London Health Sciences Centre, London, Ontario, Canada
| | | | - Ben Vandermeer
- Department of Pediatrics and Alberta Research Centre for Health Evidence
| | - Samina Ali
- Department of Pediatrics, Faculty of Medicine and Dentistry, and.,Women and Children's Health Research Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Maala Bhatt
- Department of Pediatrics, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - Shawn Hendrikx
- Department of Pediatrics, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada
| | - Evelyne D Trottier
- Centre Hospitalier Universitaire Sainte-Justine and Université de Montréal, Montréal, Québec, Canada; and
| | - Vikram Sabhaney
- BC Children's Hospital and University of British Columbia, Vancouver, British Columbia, Canada
| | | | - Gary Joubert
- Department of Pediatrics, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada.,Division of Emergency Medicine and
| | - Lisa Hartling
- Department of Pediatrics and Alberta Research Centre for Health Evidence
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Rosenberg L, Traube C. Sedation strategies in children with pediatric acute respiratory distress syndrome (PARDS). ANNALS OF TRANSLATIONAL MEDICINE 2019; 7:509. [PMID: 31728362 DOI: 10.21037/atm.2019.09.16] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
In this review, we discuss the changing landscape of sedation in mechanically ventilated children with pediatric acute respiratory distress syndrome (PARDS). While previous approaches advocated for early and deep sedation with benzodiazepines, emerging literature has highlighted the benefits of light sedation and use of non-benzodiazepine sedating agents, such as dexmedetomidine. Recent studies have emphasized the importance of monitoring multiple factors including, but not limited to, sedation depth, analgesia efficacy, opiate withdrawal, and development of delirium. Through this approach, we hope to improve PARDS outcomes. Overall, more research is needed to further our understanding of the best sedation strategies in children with PARDS.
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Affiliation(s)
- Lynne Rosenberg
- Department of Pediatrics, Weill Cornell Medical College, New York, NY, USA
| | - Chani Traube
- Department of Pediatrics, Weill Cornell Medical College, New York, NY, USA
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Liu RZ, Li BT, Zhao GQ. Efficacy of different analgesic or sedative drug therapies in pediatric patients with congenital heart disease undergoing surgery: a network meta-analysis. World J Pediatr 2019; 15:235-245. [PMID: 31016566 DOI: 10.1007/s12519-019-00252-4] [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: 10/19/2018] [Accepted: 03/27/2019] [Indexed: 11/30/2022]
Abstract
BACKGROUND Surgery is an effective therapy for congenital heart disease (CHD) and the management after surgery poses challenges for the clinical workers. We performed this network meta-analysis to enhance the corresponding evidence with respect to the relative efficacy of different drug treatments applied after the CHD surgery. METHODS Embase and PubMed were systematically retrieved to identify all published controlled trials investigating the effectiveness of drugs for patients up to 25 August, 2018. Mean differences (MD), odds ratios and their 95% credible intervals (CrIs) were used to evaluate multi-aspect comparisons. Surface under cumulative ranking curve (SUCRA) was used to analyze the relative ranking of different treatments in each endpoint. RESULTS Compared to saline, all the drugs achieved better preference under the efficacy endpoints except fentanyl in JET. As for ventilator time, all drugs were more effective than saline while only the difference of dexmedetomidine was statistically obvious (MD = 6.92, 95% CrIs 1.77-12.54). Under the endpoint of ICU time, dexmedetomidine was superior to saline as well (MD = 1.26, 95% CrIs 0.11-2.45). When all the endpoints were taken into consideration and with the help of ranking probabilities and SUCRA values, fentanyl combined with dexmedetomidine was one of the recommended drugs due to its shorter time on ventilator and stay in hospital as well as lower mortality. CONCLUSIONS Overall, based on the comprehensive consideration of all the endpoints, fentanyl combined with dexmedetomidine was considered to be the best-recommended clinical interventions among all the methods.
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Affiliation(s)
- Rui-Zhu Liu
- Department of Anesthesiology, China-Japan Union Hospital of Jilin University, Changchun 130000, China
| | - Bing-Tong Li
- Department of Rheumatology and Immunology, China-Japan Union Hospital of Jilin University, Changchun 130000, China
| | - Guo-Qing Zhao
- Department of Anesthesiology, China-Japan Union Hospital of Jilin University, Changchun 130000, China.
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Cunningham ME, Vogel AM. Analgesia, sedation, and delirium in pediatric surgical critical care. Semin Pediatr Surg 2019; 28:33-42. [PMID: 30824132 DOI: 10.1053/j.sempedsurg.2019.01.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The alleviation of discomfort and distress is an essential component of the management of critically ill surgical patients. Pain and anxiety have multifocal etiologies that may be related to an underlying disease or surgical procedure, ongoing medical therapy, invasive monitors, an unfamiliar, complex and chaotic environment, as well as fear. Pharmacologic and non-pharmacologic therapies have complex risk benefit profiles. A fundamental understanding of analgesia, sedation, and delirium is essential for optimizing important outcomes in critically ill pediatric surgical patients. There has been a recent emphasis on goal directed, evidence based, and patient-centered management of the physical and psychological needs of these children. The purpose of this article is to review and summarize recent advances and describe current practice of these important subjects in the pediatric surgical intensive care environment.
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Affiliation(s)
- Megan E Cunningham
- Texas Children's Hospital, Division of Pediatric Surgery, Department of Surgery, 6701 Fannin Street, Houston, TX 77030, USA.
| | - Adam M Vogel
- Texas Children's Hospital, Division of Pediatric Surgery, Department of Surgery, 6701 Fannin Street, Houston, TX 77030, USA; Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, TX 77030, USA.
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15
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Comparison of Maternal Stress Response to Midazolam/Fentanyl and Propofol During Cesarean Delivery Under Spinal Anesthesia: A Double-Blinded Randomized Controlled Trial. WOMEN’S HEALTH BULLETIN 2018. [DOI: 10.5812/whb.82741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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16
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Dexmedetomidine During Noninvasive Ventilation: Different Acuity, Different Risks? Pediatr Crit Care Med 2018; 19:373-375. [PMID: 29620708 DOI: 10.1097/pcc.0000000000001453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Liu Y, Bian W, Liu P, Zang X, Gu X, Chen W. Dexmedetomidine improves the outcomes in paediatric cardiac surgery: a meta-analysis of randomized controlled trials. Interact Cardiovasc Thorac Surg 2018. [PMID: 29522148 DOI: 10.1093/icvts/ivy043] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Affiliation(s)
- Yang Liu
- Department of Intensive Care Unit, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Weishuai Bian
- Department of Intensive Care Unit, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Ping Liu
- Department of Intensive Care Unit, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Xuefeng Zang
- Department of Intensive Care Unit, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Xuyun Gu
- Department of Intensive Care Unit, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Wei Chen
- Department of Intensive Care Unit, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
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Andreolio C, Piva JP, Baldasso E, Ferlini R, Piccoli R. Prolonged Infusion of Dexmedetomidine in Critically-ill Children. Indian Pediatr 2017; 53:987-989. [PMID: 27889726 DOI: 10.1007/s13312-016-0973-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
OBJECTIVE To describe main indications, doses, length of infusion and side effects related to dexmedetomidine infusion. METHODS Observational and retrospective study evaluating dexmedetomidine use in pediatric intensive care unit. RESULTS 77 children received dexmedetomidine infusion longer than 6 hours for mechanical ventilation weaning (32.5%), post- neurosurgery and post-upper airway surgery (24.7%), non-invasive ventilation (13%), refractory tachycardia (6.5%) and other causes (23.3%). After 6 hours of infusion, significant decrease in mean arterial pressure and heart rate was observed in all groups. Six children (8%) required withdrawal of drug because of possible side effects: hypotension, bradycardia and somnolence. CONCLUSION Dexmedetomidine may be used as sedative in critically ill children without much side effects.
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Affiliation(s)
- Cinara Andreolio
- Pediatric Intensive Care Unit at Hospital de Clinicas de Porto Alegre and Pediatric Emergency and Intensive Care Department Medical School UFRGS University, Brazil. Correspondence to: Cinara Andreolio Rua Ramiro Barcelos, 2350 Zip Code 90035003.
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Baarslag MA, Allegaert K, Knibbe CAJ, van Dijk M, Tibboel D. Pharmacological sedation management in the paediatric intensive care unit. J Pharm Pharmacol 2016; 69:498-513. [DOI: 10.1111/jphp.12630] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 07/27/2016] [Indexed: 02/06/2023]
Abstract
Abstract
Objective
This review addresses sedation management on paediatric intensive care units and possible gaps in the knowledge of optimal sedation strategies. We present an overview of the commonly used sedatives and their pharmacokinetic and pharmacodynamic considerations in children, as well as the ongoing studies in this field. Also, sedation guidelines and current sedation strategies and assessment methods are addressed.
Key findings
This review shows that evidence and pharmacokinetic data are scarce, but fortunately, there is an active research scene with promising new PK and PD data of sedatives in children using new study designs with application of advanced laboratory methods and modelling. The lack of evidence is increasingly being recognized by authorities and legislative offices such as the US Food and Drug Administration (FDA) and European Medicines Agency (EMA).
Conclusion
The population in question is very heterogeneous and this overview can aid clinicians and researchers in moving from practice-based sedation management towards more evidence- or model-based practice. Still, paediatric sedation management can be improved in other ways than pharmacology only, so future research should aim on sedation assessment and implementation strategies of protocolized sedation as well.
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Affiliation(s)
- Manuel A Baarslag
- Intensive Care and Department of Pediatric Surgery, Erasmus MC-Sophia Children's Hospital, Rotterdam, The Netherlands
| | - Karel Allegaert
- Intensive Care and Department of Pediatric Surgery, Erasmus MC-Sophia Children's Hospital, Rotterdam, The Netherlands
- Department of development and regeneration, KU Leuven, Belgium
| | - Catherijne A J Knibbe
- Department of Clinical Pharmacy, St. Antonius Hospital, Nieuwegein, The Netherlands
- Division of Pharmacology, Leiden Academic Center for Drug Research, Leiden University, Leiden, The Netherlands
| | - Monique van Dijk
- Intensive Care and Department of Pediatric Surgery, Erasmus MC-Sophia Children's Hospital, Rotterdam, The Netherlands
| | - Dick Tibboel
- Intensive Care and Department of Pediatric Surgery, Erasmus MC-Sophia Children's Hospital, Rotterdam, The Netherlands
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Ramaswamy SS, Parimala B. Comparative evaluation of two different loading doses of dexmedetomidine with midazolam-fentanyl for sedation in vitreoretinal surgery under peribulbar anaesthesia. Indian J Anaesth 2016; 60:89-93. [PMID: 27013746 PMCID: PMC4787139 DOI: 10.4103/0019-5049.176277] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Background and Aims: Midazolam-fentanyl (MDZ:FEN) combination has been routinely used for intravenous sedation in ophthalmic surgeries. Dexmedetomidine (DEX), a recent α2 adrenoreceptor agonist indicated for sedation for ophthalmic use at a loading dose of 0.5 μg/kg over 10 min, can cause deeper plane of sedation and surgeon dissatisfaction. Therefore, we proposed to evaluate the efficacy and safety of two different loading doses of DEX. Methods: In a prospective study, 60 patients aged 50-70 years, scheduled for retinal surgery under peribulbar block were divided equally to receive either MDZ:FEN or DEX 0.5 μg/kg (DEX full) or DEX 0.25 μg/kg (DEX half) loading dose over 10 min followed by titrated maintenance dose of DEX 0.25-0.4 μg/kg/h. Vital parameters, level of sedation (Ramsay Sedation Scale 1–6), effect on respiration and surgeon satisfaction were assessed at regular intervals. Surgeon satisfaction score (0–3) was noted. Results: ‘DEX half’ group patients had predominantly stable haemodynamics, level 3 sedation and surgeon satisfaction score of 2–3 (good to excellent operating conditions). This group had no vomiting and no respiratory depression. ‘DEX full’ group had a higher incidence of bradycardia, hypotension, level 4 sedation (Ramsay Sedation Scale) and lower surgeon satisfaction. Incidence of nausea and vomiting was higher in MDZ:FEN group compared to other two groups. Conclusion: DEX 0.25 μg/kg loading dose over 10 min followed by titrated maintenance dose is an effective alternative to MDZ:FEN and provides controlled (level 3) sedation and stable haemodynamics maximising surgeon satisfaction. Avoiding narcotic analgesics with its associated post-operative nausea and vomiting is an additional benefit.
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Affiliation(s)
- Suman Shree Ramaswamy
- Department of Anaesthesia, Nethradhama Super Speciality Eye Hospital, Jayanagar, Bengaluru, Karnataka, India
| | - B Parimala
- Department of Anaesthesia, Nethradhama Super Speciality Eye Hospital, Jayanagar, Bengaluru, Karnataka, India
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Pan W, Wang Y, Lin L, Zhou G, Hua X, Mo L. Outcomes of dexmedetomidine treatment in pediatric patients undergoing congenital heart disease surgery: a meta-analysis. Paediatr Anaesth 2016; 26:239-48. [PMID: 26612740 DOI: 10.1111/pan.12820] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/18/2015] [Indexed: 11/29/2022]
Abstract
BACKGROUND Dexmedetomidine decreases cardiac complications in adults undergoing cardiovascular surgery. This systematic review assessed whether perioperative dexmedetomidine improves congenital heart disease (CHD) surgery outcomes in children. METHODS The PubMed, Embase, and Cochrane Library databases were searched for randomized controlled trials (RCTs) or observational studies that were published until 16 April 2015 and compared dexmedetomidine with placebo or an alternative anesthetic agent during pediatric CHD surgery. The assessed outcomes included hemodynamics, ventilation length, intensive care unit (ICU) and hospital stays, blood glucose and serum cortisol levels, postoperative analgesia requirements, and postoperative delirium. RESULTS Five RCTs and nine observational studies involving 2229 patients were included. In pooled analyses, dexmedetomidine was associated with shorter length of mechanical ventilation (mean difference: -93.36, 95% CI: -137.45, -49.27), lower postoperative fentanyl (mean difference: -24.11, 95% CI: -36.98, -11.24) and morphine (mean difference: -0.07, 95% CI: -0.14, 0.00) requirements, reduced stress response (i.e., lower blood glucose and serum cortisol levels), and lower risk of delirium (OR: 0.39, 95% CI: 0.21, 0.74). The hemodynamics of dexmedetomidine-treated patients appeared more stable, but there were no significant differences in the ICU or hospital stay durations. Dexmedetomidine may increase the bradycardia and hypotension risk (OR: 3.14, 95% CI: 1.47, 6.69). CONCLUSIONS Current evidence indicates that dexmedetomidine improves outcomes in children undergoing CHD surgery. However, this finding largely relies on data from observational studies; high-quality RCTs are warranted because of the potential for subject selection bias.
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Affiliation(s)
- Wanying Pan
- Department of Anaesthesiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yueting Wang
- Department of Anaesthesiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Lin Lin
- Department of Anaesthesiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Ge Zhou
- Department of Anaesthesiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xiaoxiao Hua
- Department of Anaesthesiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Liqiu Mo
- Department of Anaesthesiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
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Abstract
OBJECTIVE Children in PICUs normally require analgesics and sedatives to maintain comfort, safety, and cooperation with interventions. α2-agonists (clonidine and dexmedetomidine) have been described as adjunctive (or alternative) sedative agents alongside opioids and benzodiazepines. This systematic review aimed to determine whether α2-agonists were effective in maintaining patients at a target sedation score over time compared with a comparator group. We also aimed to determine whether concurrent use of α2-agonists provided opioid-sparing effects. DATA SOURCES A systematic search was performed using the Cochrane Central Register of Controlled Trials, PubMed, EMBASE, CINAHL, and LILACS. STUDY SELECTION We included randomized controlled trials of children in PICU treated with clonidine or dexmedetomidine for the indication of sedation. DATA EXTRACTION Two authors independently screened articles for inclusion. DATA SYNTHESIS Six randomized controlled trials with sufficient data were identified and critically appraised. Three clonidine trials (two vs placebo and one vs midazolam) and three dexmedetomidine trials (two vs fentanyl, one vs midazolam) were included. Due to study heterogeneity it was not possible to pool studies. A narrative synthesis is provided. CONCLUSIONS Reporting of study results using the outcome "time maintained at target sedation score' for clonidine or dexmedetomidine was poor. Only one trial compared clonidine with midazolam using a sedation score outcome. This study was underpowered to demonstrate equivalence to midazolam as a sedative. The adjunctive use of clonidine demonstrated significant decreases in opioid use in neonates but not in older groups. Clonidine dose was inconsistent between studies. Dexmedetomidine demonstrated an opioid-sparing effect in two small trials. Further studies, including dose-finding studies and studies with sedation score-based outcomes, are needed.
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Yektaş A, Gümüş F, Alagol A. Características da sedação com infusão de dexmedetomidina e propofol em pacientes submetidos ao bloqueio do nervo ciático em combinação com bloqueio do nervo femoral via abordagem anterior. Braz J Anesthesiol 2015; 65:371-8. [DOI: 10.1016/j.bjan.2014.01.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Accepted: 01/02/2014] [Indexed: 10/23/2022] Open
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Yektaş A, Gümüş F, Alagol A. Dexmedetomidine and propofol infusion on sedation characteristics in patients undergoing sciatic nerve block in combination with femoral nerve block via anterior approach. Braz J Anesthesiol 2015; 65:371-8. [DOI: 10.1016/j.bjane.2014.01.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Accepted: 01/02/2014] [Indexed: 10/25/2022] Open
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