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Nakauchi C, Miyata M, Kamino S, Funato Y, Manabe M, Kojima A, Kawai Y, Uchida H, Fujino M, Boda H. Dexmedetomidine versus fentanyl for sedation in extremely preterm infants. Pediatr Int 2023; 65:e15581. [PMID: 37428855 DOI: 10.1111/ped.15581] [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: 01/29/2023] [Revised: 04/06/2023] [Accepted: 05/23/2023] [Indexed: 07/12/2023]
Abstract
BACKGROUND Few studies have compared the efficacy and complications of dexmedetomidine (DEX) and fentanyl (FEN) in extremely preterm infants. METHODS We conducted a single-institution, retrospective controlled before and after study of preterm infants before 28 weeks of gestation admitted between April 2010 and December 2018 to compare the complications and efficacy of DEX and FEN for preterm infants. Patients were administered FEN prior to 2015 and DEX after 2015 as the first-line sedative. A composite outcome of death during hospitalization and developmental quotient (DQ) < 70 at a corrected age of 3 years was compared as the primary outcome. Secondary outcomes including postmenstrual weeks at extubation, days of age when full enteral feeding was achieved and additional sedation by phenobarbital (PB) were compared. RESULTS Sixty-six infants were enrolled into the study. The only perinatal factor that differed between the FEN (n = 33) and DEX (n = 33) groups was weeks of gestation. The composite outcome of death and DQ < 70 at a corrected age of 3 years were not significantly different. Postmenstrual weeks at extubation did not significantly differ between groups after adjustment for weeks of gestation and being small for gestational age. On the other hand, full feeding was significantly prolonged by DEX (p = 0.031). Additional sedation was less common in the DEX group (p = 0.044). CONCLUSION The composite outcome of death and DQ < 70 at a corrected age of 3 years were not significantly different by DEX or FEN for primary sedation. Prospective randomized controlled trials should examine the long-term effects on development.
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Affiliation(s)
- Chiharuko Nakauchi
- Department of Pediatrics, Fujita Health University School of Medicine, Toyoake City, Japan
| | - Masafumi Miyata
- Department of Pediatrics, Fujita Health University School of Medicine, Toyoake City, Japan
| | - Shigemitsu Kamino
- Department of Pediatrics, Fujita Health University School of Medicine, Toyoake City, Japan
| | - Yusuke Funato
- Department of Pediatrics, Fujita Health University School of Medicine, Toyoake City, Japan
| | - Masahiko Manabe
- Department of Pediatrics, Fujita Health University School of Medicine, Toyoake City, Japan
| | - Arisa Kojima
- Department of Pediatrics, Fujita Health University School of Medicine, Toyoake City, Japan
| | - Yuri Kawai
- Department of Pediatrics, Fujita Health University School of Medicine, Toyoake City, Japan
| | - Hidetoshi Uchida
- Department of Pediatrics, Fujita Health University School of Medicine, Toyoake City, Japan
| | - Masayuki Fujino
- Department of Pediatrics, Fujita Health University School of Medicine, Toyoake City, Japan
| | - Hiroko Boda
- Department of Pediatrics, Fujita Health University School of Medicine, Toyoake City, Japan
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Ojha S, Abramson J, Dorling J. Sedation and analgesia from prolonged pain and stress during mechanical ventilation in preterm infants: is dexmedetomidine an alternative to current practice? BMJ Paediatr Open 2022; 6:10.1136/bmjpo-2022-001460. [PMID: 36053596 PMCID: PMC9092181 DOI: 10.1136/bmjpo-2022-001460] [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: 03/25/2022] [Accepted: 04/22/2022] [Indexed: 01/09/2023] Open
Abstract
Mechanical ventilation is an uncomfortable and potentially painful intervention. Opioids, such as morphine and fentanyl, are used for analgesia and sedation but there is uncertainty whether they reduce pain in mechanically ventilated infants. Moreover, there may be short-term and long-term adverse consequences such as respiratory depression leading to prolonged mechanical ventilation and detrimental long-term neurodevelopmental effects. Despite this, opioids are widely used, possibly due to a lack of alternatives.Dexmedetomidine, a highly selective alpha-2-adrenergic agonist with analgesic and sedative effects, currently approved for adults, has come into use in newborn infants. It provides analgesia and simulates natural sleep with maintenance of spontaneous breathing and upper airway tone. Although data on pharmacokinetics-pharmacodynamics in preterm infants are scant, observational studies report that using dexmedetomidine in conjunction with opioids/benzodiazepines or on its own can reduce the cumulative exposure to opioids/benzodiazepines. As it does not cause respiratory depression, dexmedetomidine could enable quicker weaning and extubation. Dexmedetomidine has also been suggested as an adjunct to therapeutic hypothermia in hypoxic ischaemic encephalopathy and others have used it during painful procedures and surgery. Dexmedetomidine infusion can cause bradycardia and hypotension although most report clinically insignificant effects.The increasing number of publications of observational studies and clinical use demonstrates that dexmedetomidine is being used in newborn infants but data on safety and efficacy are scant and not of high quality. Importantly, there are no data on long-term neurodevelopmental impact on preterm or term-born infants. The acceptance of dexmedetomidine in routine clinical practice must be preceded by clinical evidence. We need adequately powered and well-designed randomised controlled trials investigating whether dexmedetomidine alone or with opioids/benzodiazepines in infants on mechanical ventilation reduces the need for opioids/benzodiazepine and improves neurodevelopment at 24 months and later as compared with the use of opioids/benzodiazepines alone.
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Affiliation(s)
- Shalini Ojha
- Academic Unit of Lifespan and Population Health, School of Medicine, University of Nottingham, Nottingham, UK .,Neonatal Unit, University Hospitals of Derby and Burton NHS Foundation Trust, Derby, UK
| | - Janine Abramson
- Academic Unit of Lifespan and Population Health, School of Medicine, University of Nottingham, Nottingham, UK
| | - Jon Dorling
- Department of Neonatal Medicine, University Hospital Southampton NHS Foundation Trust, Southampton, UK
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Morton SU, Labrecque M, Moline M, Hansen A, Leeman K. Reducing Benzodiazepine Exposure by Instituting a Guideline for Dexmedetomidine Usage in the NICU. Pediatrics 2021; 148:e2020041566. [PMID: 34610948 DOI: 10.1542/peds.2020-041566] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/22/2021] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Midazolam is a benzodiazepine sedative used in NICUs. Because benzodiazepine's effects include respiratory depression and potential detrimental developmental effects, minimizing exposure could benefit neonates. Dexmedetomidine is routinely used for sedation in older pediatric populations. We implemented a quality improvement initiative with the aim of decreasing midazolam infusions by 20% through use of dexmedetomidine. METHODS A multidisciplinary committee created a sedation guideline that included standardized dexmedetomidine dosing escalation and weaning. Baseline data collection occurred from January 2015 to February 2018, with intervention from March 2018 to December 2019. Percentage of sedation episodes with dexmedetomidine initiated was followed as a process measure. Outcomes measures were percentage of eligible infants receiving midazolam infusions and midazolam-free days per sedation episode. Bradycardia with dexmedetomidine, unplanned extubation rates, and morphine dosage were monitored as balancing measures. RESULTS Our study included 434 episodes of sedation in 386 patients. Dexmedetomidine initiation increased from 18% to 49%. The intervention was associated with a significant reduction in midazolam initiation by 30%, from 95% to 65%, with special cause variation on statistical process control chart analysis. Midazolam-free days per sedation episode increased from 0.3 to 2.2 days, and patients receiving dexmedetomidine had lower midazolam doses (1.3 mg/kg per day versus 2.2 mg/kg per day, P = 5.97 × 10-04). Bradycardia requiring discontinuation of dexmedetomidine, unplanned extubation rates, and morphine doses were unchanged. CONCLUSIONS Implementation of a quality improvement initiative was successful in reducing the percentage of patients receiving midazolam infusions and increased midazolam-free days per sedation episode, revealing an overall reduction in benzodiazepine exposure while maintaining adequate sedation.
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Affiliation(s)
- Sarah U Morton
- Division of Newborn Medicine, Department of Pediatrics, Boston Children's Hospital, Boston, Massachusetts
- Harvard Medical School, Harvard University, Boston, Massachusetts
| | - Michelle Labrecque
- Division of Newborn Medicine, Department of Pediatrics, Boston Children's Hospital, Boston, Massachusetts
| | - Mark Moline
- Division of Newborn Medicine, Department of Pediatrics, Boston Children's Hospital, Boston, Massachusetts
| | - Anne Hansen
- Division of Newborn Medicine, Department of Pediatrics, Boston Children's Hospital, Boston, Massachusetts
- Harvard Medical School, Harvard University, Boston, Massachusetts
| | - Kristen Leeman
- Division of Newborn Medicine, Department of Pediatrics, Boston Children's Hospital, Boston, Massachusetts
- Harvard Medical School, Harvard University, Boston, Massachusetts
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Sha H, Peng P, Wei G, Wang J, Wu Y, Huang H. Neuroprotective Effects of Dexmedetomidine on the Ketamine-Induced Disruption of the Proliferation and Differentiation of Developing Neural Stem Cells in the Subventricular Zone. Front Pediatr 2021; 9:649284. [PMID: 34386466 PMCID: PMC8353121 DOI: 10.3389/fped.2021.649284] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Accepted: 07/01/2021] [Indexed: 01/05/2023] Open
Abstract
Background: Ketamine disrupts the proliferation and differentiation of developing neural stem cells (NSCs). Therefore, the safe use of ketamine in pediatric anesthesia has been an issue of increasing concern among anesthesiologists and children's parents. Dexmedetomidine (DEX) is widely used in sedation as an antianxiety agent and for analgesia. DEX has recently been shown to provide neuroprotection against anesthetic-induced neurotoxicity in the developing brain. The aim of this in vivo study was to investigate whether DEX exerted neuroprotective effects on the proliferation and differentiation of NSCs in the subventricular zone (SVZ) following neonatal ketamine exposure. Methods: Postnatal day 7 (PND-7) male Sprague-Dawley rats were equally divided into the following five groups: control group (n = 8), ketamine group (n = 8), 1 μg/kg DEX+ketamine group (n = 8), 5 μg/kg DEX+ketamine group (n = 8) and 10 μg/kg DEX+ketamine group (n = 8). Immediately after treatment, rats received a single intraperitoneal injection of BrdU, and the proliferation and differentiation of NSCs in the SVZ were assessed using immunostaining at 24 h after the BrdU injection. In the olfactory behavioral tests, rats in each group were raised until 2 months old, and the buried food test and olfactory memory test were performed. Results: The proliferation of NSCs and astrocytic differentiation in the SVZ were significantly inhibited at 24 h after repeated ketamine exposure in the neonatal period, and neuronal differentiation was markedly increased. Furthermore, pretreatment with moderately high (5 μg/kg) or high doses (10 μg/kg) of DEX reversed ketamine-induced disturbances in the proliferation and differentiation of NSCs. In the behavior tests, repeated neonatal ketamine exposure induced olfactory cognitive dysfunction in the adult stage, and moderately high and high doses of DEX reversed the olfactory cognitive dysfunction induced by ketamine. Conclusions: Based on the present findings, pretreatment with a moderately high (5 μg/kg) or high dose (10 μg/kg) of DEX may alleviate the developmental neurogenesis disorder in the SVZ at 24 h after repeated ketamine exposure and improve olfactory cognitive dysfunction in adulthood.
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Affiliation(s)
- Huanhuan Sha
- Department of Anesthesiology and Perioperative Medicine, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Peipei Peng
- Department of Anesthesiology and Perioperative Medicine, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Guohua Wei
- Department of Anesthesiology and Perioperative Medicine, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Juan Wang
- Department of Anesthesiology and Perioperative Medicine, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yuqing Wu
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, China
| | - He Huang
- Department of Anesthesiology and Perioperative Medicine, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
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Lv K, Yang C, Xiao R, Yang L, Liu T, Zhang R, Fan X. Dexmedetomidine attenuates ethanol-induced inhibition of hippocampal neurogenesis in neonatal mice. Toxicol Appl Pharmacol 2020; 390:114881. [PMID: 31954762 DOI: 10.1016/j.taap.2020.114881] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 01/10/2020] [Accepted: 01/13/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND/AIMS Ethanol (EtOH) exposure during a period comparable to the third trimester in human results in obvious neurotoxicity in the developing hippocampus and persistent deficits in hippocampal neurogenesis. Dexmedetomidine (DEX), a highly selective α-2-adrenergic agonist has been demonstrated to restore the impaired neurogenesis and neuronal plasticity in the dentate gyrus (DG) that follows neurological insult. However, the protective roles of DEX in the EtOH-induced deficits of postnatal neurogenesis in the hippocampus are still unknown. METHODS Mice were pretreated with DEX prior to EtOH exposure to determine its protective effects on impaired postnatal hippocampal neurogenesis. Six-day-old neonatal mice were treated with DEX (125 μg/kg) or saline, followed by EtOH at a total of 5 g/kg or an equivalent volume of saline on P7. Immunohistochemistry and immunofluorescence were used to evaluate the neurogenesis and activated microglia in the DG. Quantitative real time PCR (qRT-PCR) was utilized to assess the expression of inflammatory factors in the hippocampus. RESULTS DEX pretreatment attenuated the inhibition of EtOH-mediated hippocampal neurogenesis and the reduction of hippocampal neural precursor cells (NPCs). We further confirmed that DEX pretreatment reversed the EtOH-induced microglia activation in the DG as well as the upregulation of the hippocampal TNFα, MCP-1, IL-6, and IL-1β mRNA levels. CONCLUSION Our findings indicate that DEX pretreatment protects against EtOH-mediated inhibition of hippocampal neurogenesis in postnatal mice and reverses EtOH-induced neuroinflammation via repressing microglia activation and the expression of inflammatory cytokines.
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Affiliation(s)
- Keyi Lv
- Department of Developmental Neuropsychology, School of Psychology, Third Military Medical University, Chongqing 400038, China
| | - Congwen Yang
- Department of Anesthesiology, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Rui Xiao
- Department of Developmental Neuropsychology, School of Psychology, Third Military Medical University, Chongqing 400038, China
| | - Ling Yang
- Department of Developmental Neuropsychology, School of Psychology, Third Military Medical University, Chongqing 400038, China
| | - Tianyao Liu
- Department of Developmental Neuropsychology, School of Psychology, Third Military Medical University, Chongqing 400038, China
| | - Ruiyu Zhang
- Department of Developmental Neuropsychology, School of Psychology, Third Military Medical University, Chongqing 400038, China
| | - Xiaotang Fan
- Department of Developmental Neuropsychology, School of Psychology, Third Military Medical University, Chongqing 400038, China.
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Romantsik O, Calevo MG, Norman E, Bruschettini M. Clonidine for sedation and analgesia for neonates receiving mechanical ventilation. Cochrane Database Syst Rev 2017; 5:CD012468. [PMID: 28488361 PMCID: PMC6481534 DOI: 10.1002/14651858.cd012468.pub2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Although routine administration of pharmacologic sedation or analgesia during mechanical ventilation in preterm neonates is not recommended, its use in clinical practice remains common. Alpha-2 agonists, mainly clonidine and dexmedetomidine, are used as adjunctive (or alternative) sedative agents alongside opioids and benzodiazepines. Clonidine has not been systematically assessed for use in neonatal sedation during ventilation. OBJECTIVES To assess whether clonidine administered to term and preterm newborn infants receiving mechanical ventilation reduces morbidity and mortality rates. To compare the intervention versus placebo, no treatment, and dexmedetomidine; and to assess the safety of clonidine infusion for potential harms.To perform subgroup analyses according to gestational age; birth weight; administration method (infusion or bolus therapy); dose, duration, and route of clonidine administration; and pharmacologic sedation as a co-intervention. SEARCH METHODS We used the standard search strategy of the Cochrane Neonatal Review Group to search the Cochrane Central Register of Controlled Trials (CENTRAL; 2016, Issue 12) in the Cochrane Library, MEDLINE via PubMed (1966 to January 10, 2017), Embase (1980 to January 10, 2017), and the Cumulative Index to Nursing and Allied Health Literature (CINAHL; 1982 to January 10, 2017). We also searched clinical trials databases, conference proceedings, and the reference lists of retrieved articles for randomized controlled trials and quasi-randomized trials. SELECTION CRITERIA We searched for randomized controlled trials, quasi-randomized controlled trials, and cluster trials comparing clonidine versus placebo, no treatment, or dexmedetomidine administered to term and preterm newborns receiving mechanical ventilation via an endotracheal tube. DATA COLLECTION AND ANALYSIS For the included trial, two review authors independently extracted data (e.g. number of participants, birth weight, gestational age, all-cause death during initial hospitalization, duration of respiratory support, sedation scale, duration of hospital stay) and assessed risk of bias (e.g. adequacy of randomization, blinding, completeness of follow-up). This review considered primary outcomes of all-cause neonatal death, all-cause death during initial hospitalization, and duration of mechanical ventilation in days. MAIN RESULTS One trial, which included 112 infants, met the inclusion criteria for this review. Term newborn infants on mechanical ventilation with the need for continuous analgesia and sedation with fentanyl and midazolam were eligible for enrollment during the first 96 hours of ventilation. Study authors administered clonidine 1 μg/kg/h or placebo on day 4 after intubation.We found no differences between the two groups in all-cause death during hospitalization (risk ratio [RR] 0.69, 95% confidence interval [CI] 0.12 to 3.98). The quality of the evidence supporting these findings is low owing to imprecision of the estimates (one study; few events). The median (interquartile range) duration of mechanical ventilation was 7.1 days (5.7 to 9.1 days) in the clonidine group and 5.8 days (4.9 to 7.9 days) in the placebo group, respectively (P = 0.070). Among secondary outcomes, we found no differences in terms of duration of stay in the intensive care unit. Sedation scale values (COMFORT) and analgesia scores (Hartwig) during the first 72 hours of infusion of study medication were lower in the clonidine group than in the placebo group. AUTHORS' CONCLUSIONS At present, evidence is insufficient to show the efficacy and safety of clonidine for sedation and analgesia in term and preterm newborn infants receiving mechanical ventilation.
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Affiliation(s)
- Olga Romantsik
- Lund University, Skåne University HospitalDepartment of PaediatricsLundSweden
| | - Maria Grazia Calevo
- Istituto Giannina GasliniEpidemiology, Biostatistics and Committees UnitGenoaItaly16147
| | - Elisabeth Norman
- Lund University, Skane University HospitalDepartment of PaediatricsLundSweden
| | - Matteo Bruschettini
- Lund University, Skåne University HospitalDepartment of PaediatricsLundSweden
- Skåne University HospitalResearch & Development, Section for HTA AnalysisLasarettsgatan 40LundSweden
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Endesfelder S, Makki H, von Haefen C, Spies CD, Bührer C, Sifringer M. Neuroprotective effects of dexmedetomidine against hyperoxia-induced injury in the developing rat brain. PLoS One 2017; 12:e0171498. [PMID: 28158247 PMCID: PMC5291450 DOI: 10.1371/journal.pone.0171498] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 01/20/2017] [Indexed: 12/19/2022] Open
Abstract
Dexmedetomidine (DEX) is a highly selective agonist of α2-receptors with sedative, anxiolytic, and analgesic properties. Neuroprotective effects of dexmedetomidine have been reported in various brain injury models. In the present study, we investigated the effects of dexmedetomidine on hippocampal neurogenesis, specifically the proliferation capacity and maturation of neurons and neuronal plasticity following the induction of hyperoxia in neonatal rats. Six-day old sex-matched Wistar rats were exposed to 80% oxygen or room air for 24 h and treated with 1, 5 or 10 μg/kg of dexmedetomidine or normal saline. A single pretreatment with DEX attenuated the hyperoxia-induced injury in terms of neurogenesis and plasticity. In detail, both the proliferation capacity (PCNA+ cells) as well as the expression of neuronal markers (Nestin+, PSA-NCAM+, NeuN+ cells) and transcription factors (SOX2, Tbr1/2, Prox1) were significantly reduced under hyperoxia compared to control. Furthermore, regulators of neuronal plasticity (Nrp1, Nrg1, Syp, and Sema3a/f) were also drastically decreased. A single administration of dexmedetomidine prior to oxygen exposure resulted in a significant up-regulation of expression-profiles compared to hyperoxia. Our results suggest that dexmedetomidine may have neuroprotective effects in an acute hyperoxic model of the neonatal rat.
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Affiliation(s)
- Stefanie Endesfelder
- Department of Neonatology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Hanan Makki
- Department of Neonatology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Clarissa von Haefen
- Department of Anesthesiology and Intensive Care Medicine, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Claudia D Spies
- Department of Anesthesiology and Intensive Care Medicine, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Christoph Bührer
- Department of Neonatology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Marco Sifringer
- Department of Anesthesiology and Intensive Care Medicine, Charité - Universitätsmedizin Berlin, Berlin, Germany
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Dexmedetomidine: A Solution to the Dilemma of Pain and Agitation in the Mechanically Ventilated Preterm Neonate? J Perinat Neonatal Nurs 2017; 31:104-108. [PMID: 28437301 DOI: 10.1097/jpn.0000000000000251] [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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Bong CL, Yeo ASH, Fabila T, Tan JSK. A pilot study of dexmedetomidine sedation and caudal anesthesia for inguinal hernia repair in infants. Paediatr Anaesth 2016; 26:621-7. [PMID: 27061946 DOI: 10.1111/pan.12907] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/15/2016] [Indexed: 12/21/2022]
Abstract
BACKGROUND Recent concerns regarding possible long-term effects of early anesthesia exposure on neurodevelopment in children have provided an impetus to explore alternative anesthetic techniques using potentially neuroprotective agents. Dexmedetomidine has not been implicated in anesthesia-induced neurotoxicity and has been shown to be neuroprotective in preclinical studies. We describe a case series of 50 neonates and infants who received dexmedetomidine sedation with caudal anesthesia instead of general endotracheal anesthesia for inguinal hernia surgery. METHODS We conducted a retrospective chart review on all neonates and infants who underwent inguinal hernia surgery with dexemetomidine sedation and caudal anesthesia in our institution. We started exploring this technique since October 2011 and established a protocol of administering dexmedetomidine 2 mcg·kg(-1) over 10 min, followed by 1 mcg·kg(-1) over the next 10 min. This led to satisfactory conditions for caudal placement in 20 min, with minimal need for airway intervention during surgery. RESULTS The median gestational age of the infants was 31.4 (28.7, 36.0) weeks and median postconceptual age was 39.7 weeks (IQR 37.8, 45.7) at time of surgery. Of patients, 86% had surgery successfully completed under this technique alone. Seven patients required sevoflurane or nitrous oxide due to failed caudal block (n = 1) or difficult or prolonged surgery (n = 6). After establishing the sedation protocol and excluding patients with large or complicated hernias, the success rate was 96%. Transient intra-operative apnea or hypoventilation occurred in five patients and postoperative apnea in two patients. All respiratory events were easily reversed and no patient developed significant bradycardia or required intubation. CONCLUSIONS Dexmedetomidine sedation with caudal anesthesia is a feasible alternative to spinal or general anesthesia in selected infants undergoing uncomplicated hernia surgery. It avoids the need for endotracheal intubation and may be potentially beneficial in avoiding the unknown effects of general anesthesia on neurodevelopment.
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Affiliation(s)
- Choon L Bong
- Department of Paediatric Anaesthesia, KK Women's and Children's Hospital, Singapore, Singapore
| | - Angela S H Yeo
- Department of Paediatric Anaesthesia, KK Women's and Children's Hospital, Singapore, Singapore
| | - Teddy Fabila
- Department of Paediatric Anaesthesia, KK Women's and Children's Hospital, Singapore, Singapore
| | - Josephine S K Tan
- Department of Paediatric Anaesthesia, KK Women's and Children's Hospital, Singapore, Singapore
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Neuroprotective effect of dexmedetomidine on hyperoxia-induced toxicity in the neonatal rat brain. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2015:530371. [PMID: 25653737 PMCID: PMC4310240 DOI: 10.1155/2015/530371] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Accepted: 12/10/2014] [Indexed: 11/19/2022]
Abstract
Dexmedetomidine is a highly selective agonist of α2-receptors with sedative, anxiolytic, analgesic, and anesthetic properties. Neuroprotective effects of dexmedetomidine have been reported in various brain injury models. In the present study, we investigated the effects of dexmedetomidine on neurodegeneration, oxidative stress markers, and inflammation following the induction of hyperoxia in neonatal rats. Six-day-old Wistar rats received different concentrations of dexmedetomidine (1, 5, or 10 µg/kg bodyweight) and were exposed to 80% oxygen for 24 h. Sex-matched littermates kept in room air and injected with normal saline or dexmedetomidine served as controls. Dexmedetomidine pretreatment significantly reduced hyperoxia-induced neurodegeneration in different brain regions of the neonatal rat. In addition, dexmedetomidine restored the reduced/oxidized glutathione ratio and attenuated the levels of malondialdehyde, a marker of lipid peroxidation, after exposure to high oxygen concentration. Moreover, administration of dexmedetomidine induced downregulation of IL-1β on mRNA and protein level in the developing rat brain. Dexmedetomidine provides protections against toxic oxygen induced neonatal brain injury which is likely associated with oxidative stress signaling and inflammatory cytokines. Our results suggest that dexmedetomidine may have a therapeutic potential since oxygen administration to neonates is sometimes inevitable.
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Abstract
As a standard of care for preterm/term newborns effective pain management may improve their clinical and neurodevelopmental outcomes. Neonatal pain is assessed using context-specific, validated, and objective pain methods, despite the limitations of currently available tools. Therapeutic approaches reducing invasive procedures and using pharmacologic, behavioral, or environmental measures are used to manage neonatal pain. Nonpharmacologic approaches like kangaroo care, facilitated tucking, non-nutritive sucking, sucrose, and others can be used for procedural pain or adjunctive therapy. Local/topical anesthetics, opioids, NSAIDs/acetaminophen and other sedative/anesthetic agents can be incorporated into NICU protocols for managing moderate/severe pain or distress in all newborns.
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EZZATI M, BROAD K, KAWANO G, FAULKNER S, HASSELL J, FLEISS B, GRESSENS P, FIERENS I, ROSTAMI J, MAZE M, SLEIGH JW, ANDERSON B, SANDERS RD, ROBERTSON NJ. Pharmacokinetics of dexmedetomidine combined with therapeutic hypothermia in a piglet asphyxia model. Acta Anaesthesiol Scand 2014; 58:733-42. [PMID: 24724965 PMCID: PMC4171780 DOI: 10.1111/aas.12318] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/06/2014] [Indexed: 12/29/2022]
Abstract
Background The highly selective α2-adrenoreceptor agonist, dexmedetomidine, exerts neuroprotective, analgesic, anti-inflammatory and sympatholytic properties that may be beneficial for perinatal asphyxia. The optimal safe dose for pre-clinical newborn neuroprotection studies is unknown. Methods Following cerebral hypoxia-ischaemia, dexmedetomidine was administered to nine newborn piglets in a de-escalation dose study in combination with hypothermia (whole body cooling to 33.5°C). Dexmedetomidine was administered with a loading dose of 1 μg/kg and maintenance infusion at doses from 10 to 0.6 μg/kg/h. One additional piglet was not subjected to hypoxia-ischaemia. Blood for pharmacokinetic analysis was sampled pre-insult and frequently post-insult. A one-compartment linear disposition model was used to fit data. Population parameter estimates were obtained using non-linear mixed effects modelling. Results All dexmedetomidine infusion regimens led to plasma concentrations above those associated with sedation in neonates and children (0.4–0.8 μg/l). Seven out of the nine piglets with hypoxia-ischaemia experienced periods of bradycardia, hypotension, hypertension and cardiac arrest; all haemodynamic adverse events occurred in piglets with plasma concentrations greater than 1 μg/l. Dexmedetomidine clearance was 0.126 l/kg/h [coefficient of variation (CV) 46.6.%] and volume of distribution was 3.37 l/kg (CV 191%). Dexmedetomidine clearance was reduced by 32.7% at a temperature of 33.5°C. Dexmedetomidine clearance was reduced by 55.8% following hypoxia-ischaemia. Conclusions Dexmedetomidine clearance was reduced almost tenfold compared with adult values in the newborn piglet following hypoxic-ischaemic brain injury and subsequent therapeutic hypothermia. Reduced clearance was related to cumulative effects of both hypothermia and exposure to hypoxia. High plasma levels of dexmedetomidine were associated with major cardiovascular complications.
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Affiliation(s)
- M. EZZATI
- Institute for Women's Health; University College London; London UK
| | - K. BROAD
- Institute for Women's Health; University College London; London UK
| | - G. KAWANO
- Institute for Women's Health; University College London; London UK
| | - S. FAULKNER
- Institute for Women's Health; University College London; London UK
| | - J. HASSELL
- Institute for Women's Health; University College London; London UK
| | - B. FLEISS
- Centre for the Developing Brain; Kings College; St Thomas' Campus; London UK
- Inserm, U676; Paris France
- University Paris Diderot; Sorbonne Paris Cite; UMRS 676; Paris France
| | - P. GRESSENS
- Centre for the Developing Brain; Kings College; St Thomas' Campus; London UK
- Inserm, U676; Paris France
- University Paris Diderot; Sorbonne Paris Cite; UMRS 676; Paris France
| | - I. FIERENS
- Institute for Women's Health; University College London; London UK
| | - J. ROSTAMI
- Institute for Women's Health; University College London; London UK
| | - M. MAZE
- Department of Anesthetics and Perioperative Care; University of California San Francisco; San Francisco CA USA
| | - J. W. SLEIGH
- Department of Anaesthesiology; University of Auckland; Auckland New Zealand
| | - B. ANDERSON
- Department of Anaesthesiology; University of Auckland; Auckland New Zealand
| | - R. D. SANDERS
- Department of Anaesthesia & Surgical Outcomes Research Centre; University College London Hospital; London UK
- Wellcome Trust Department of Imaging Neuroscience; University College London; London UK
| | - N. J. ROBERTSON
- Institute for Women's Health; University College London; London UK
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Abstract
Regardless of age, health care professionals have a professional and ethical obligation to provide safe and effective analgesia to patients undergoing painful procedures. Historically, newborns, particularly premature and sick infants, have been undertreated for pain. Intubation of the trachea and mechanical ventilation are ubiquitous painful procedures in the neonatal intensive care unit that are poorly assessed and treated. The authors review the use of sedation and analgesia to facilitate endotracheal tube placement and mechanical ventilation. Controversies regarding possible adverse neurodevelopmental outcomes after sedative and anesthetic exposure and in the failure to treat pain is also discussed.
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Abstract
Whole-body cooling, or therapeutic hypothermia, is increasingly becoming the standard of treatment for moderate to severe neonatal encephalopathy because it reduces neurodevelopmental disabilities and mortality in term neonates. Subcutaneous fat necrosis (SCFN) of the newborn has been identified as a potential side effect of birth asphyxia. In recent literature, there has been an increase in SCFN in infants who received whole-body cooling in treatment of neonatal encephalopathy. Subcutaneous fat necrosis is a rare and self-limiting disorder of the adipose tissue that usually occurs in full-term or postterm infants. The disorder can appear days to weeks after birth and spontaneously resolves within weeks to months without any intervention but can have potential complications. With the increasing use of whole-body cooling in the neonate population, clinicians should be aware of SCFN as a possible side effect. This article describes a case of SCFN occurring after whole-body cooling on a term infant with perinatal asphyxia.
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15
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McPherson C. Sedation and analgesia in mechanically ventilated preterm neonates: continue standard of care or experiment? J Pediatr Pharmacol Ther 2013; 17:351-64. [PMID: 23413121 DOI: 10.5863/1551-6776-17.4.351] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Attention to comfort and pain control are essential components of neonatal intensive care. Preterm neonates are uniquely susceptible to pain and agitation, and these exposures have a negative impact on brain development. In preterm neonates, chronic pain and agitation are common adverse effects of mechanical ventilation, and opiates or benzodiazepines are the pharmacologic agents most often used for treatment. Questions remain regarding the efficacy, safety, and neurodevelopmental impact of these therapies. Both preclinical and clinical data suggest troubling adverse drug reactions and the potential for adverse longterm neurodevelopmental impact. The negative impacts of standard pharmacologic agents suggest that alternative agents should be investigated. Dexmedetomidine is a promising alternative therapy that requires further interprofessional and multidisciplinary research in this population.
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O'Mara K, Gal P, Wimmer J, Ransom JL, Carlos RQ, Dimaguila MAV, Davanzo CC, Smith M. Dexmedetomidine versus standard therapy with fentanyl for sedation in mechanically ventilated premature neonates. J Pediatr Pharmacol Ther 2012; 17:252-62. [PMID: 23258968 PMCID: PMC3526929 DOI: 10.5863/1551-6776-17.3.252] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE To compare the efficacy and safety of dexmedetomidine and fentanyl for sedation in mechanically ventilated premature neonates. METHODS This was a retrospective, observational case-control study in a level III neonatal intensive care unit. Forty-eight premature neonates requiring mechanical ventilation were included. Patients received fentanyl (n=24) or dexmedetomidine (n=24) for pain or sedation. Each group also received fentanyl and lorazepam boluses as needed for agitation. The primary outcomes were efficacy and frequency of acute adverse events associated with each drug. Days on mechanical ventilation, stooling patterns, feeding tolerance, and neurologic outcomes were also evaluated. RESULTS There were no significant differences in baseline demographics between the dexmedetomidine and fentanyl patients. Patients in the dexmedetomidine group required less adjunctive sedation and had more days free of additional sedation in comparison to fentanyl (54.1% vs. 16.5%, p<0.0001). There were no differences in hemodynamic parameters between the 2 groups. Duration of mechanical ventilation was shorter in the dexmedetomidine group (14.4 vs. 28.4 days, p<0.001). Meconium passage (7.5 vs. 22.4 days, p<0.0002) and time from initiation to achievement of full enteral feeds (26.8 vs. 50.8 days, p<0.0001) were shorter in the dexmedetomidine group. Incidence of culture-positive sepsis was lower in the dexmedetomidine group (48% vs. 88%). The incidence of either severe intraventricular hemorrhage or periventricular leukomalacia was not statistically significantly reduced (2% vs. 7%). CONCLUSIONS Dexmedetomidine was safe and effective for sedation in the premature neonates included in this study. Prospective randomized-controlled trials are needed before routine use of dexmedetomidine can be recommended.
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Affiliation(s)
| | - Peter Gal
- Women's Hospital of Greensboro, Cone Health, Greensboro, North Carolina
- Greensboro Area Health Education Center, Greensboro, North Carolina
- University of North Carolina, Eschelman School of Pharmacy, Chapel Hill, North Carolina
| | - John Wimmer
- Women's Hospital of Greensboro, Cone Health, Greensboro, North Carolina
- Piedmont Neonatology, PC, Greensboro, North Carolina
| | - J. Laurence Ransom
- Women's Hospital of Greensboro, Cone Health, Greensboro, North Carolina
- Piedmont Neonatology, PC, Greensboro, North Carolina
| | - Rita Q. Carlos
- Women's Hospital of Greensboro, Cone Health, Greensboro, North Carolina
- Piedmont Neonatology, PC, Greensboro, North Carolina
| | - Mary Ann V.T. Dimaguila
- Women's Hospital of Greensboro, Cone Health, Greensboro, North Carolina
- Piedmont Neonatology, PC, Greensboro, North Carolina
| | - Christie C. Davanzo
- Women's Hospital of Greensboro, Cone Health, Greensboro, North Carolina
- Piedmont Neonatology, PC, Greensboro, North Carolina
| | - McCrae Smith
- Women's Hospital of Greensboro, Cone Health, Greensboro, North Carolina
- Piedmont Neonatology, PC, Greensboro, North Carolina
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17
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Affiliation(s)
- Anju Grewal
- Department of Anesthesiology, Dayanand Medical College and Hospital, Ludhiana, Punjab, India
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19
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Abstract
IMPORTANCE OF THE FIELD Dexmedetomidine is an α(2)-adrenoceptor agonist with sedative, anxiolytic and analgesic properties. It is used off-label in pediatric patients due to its efficacy and lack of adverse respiratory effects. Dexmedetomidine may cause severe circulatory complications in adults. Despite its popularity, the safety of dexmedetomidine in the pediatric population has not been extensively studied. AREAS COVERED IN THIS REVIEW This article reviews the current literature (up to 2010) focusing on applications and safety of dexmedetomidine administered to pediatric patients. WHAT THE READER WILL GAIN Dexmedetomidine is a useful sedative and anxiolytic drug in the pediatric intensive care unit as well as during diagnostic and therapeutic procedures. Deleterious effects of dexmedetomidine include hypotension and bradycardia. Additionally, hypertension may occur during the "loading dose" or with high infusion rates. Few studies have been performed to evaluate the safety of dexmedetomidine in pediatrics. The development of tolerance and withdrawal has not been studied in children. TAKE HOME MESSAGE Despite its favorable respiratory profile, dexmedetomidine may cause deleterious cardiovascular effects. Close monitoring of circulatory dynamics and judicious titration is recommended. Further studies are needed to better define adverse effects following long-term infusions as well as in special populations such as pre-term infants.
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Affiliation(s)
- Felice Su
- Division of Critical Care Medicine, Department of Pediatrics, Stanford University, 770 Welch Road, Palo Alto, CA 94304, USA.
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