Dexmedetomidine vs midazolam as preanesthetic medication in children: a meta-analysis of randomized controlled trials

Perioperative Staff's Experiences of Premedication for Children

PURPOSE

Providing perioperative care for children who express anxiety or react with negative anxiety-associated consequences can be a challenge. The use of premedication is established as an important intervention for young children before surgery, yet research into care providers' experiences of premedication is limited. The aim of this study was to explore perioperative staff's experiences of premedication for preschool-age children.

DESIGN

A descriptive inductive qualitative study was performed based on focus group discussions.

METHODS

A purposive sample of a team from the operating department with experience in anesthetizing and caring for children in the perioperative period was interviewed in small focus groups: five preoperative and postoperative care nurses, five nurse anesthetists, and five anesthesiologists. The transcribed text was categorized using qualitative content analysis.

FINDINGS

The content analysis revealed three themes: a matter of time, do not wake the sleeping bear, and on responsive tiptoes.

CONCLUSIONS

Care providers must adapt their work to the child's emotional state of mind and needs, allowing time for the child to trust and accept the premedication and for the premedication to reach its peak effect. Premedication provides light sleep preoperatively, which requires careful treatment of the child to avoid emotional reactions, and the postoperative path is most peaceful when the premedication supports a long duration of sedation. Our findings highlight the need for safety precautions and a permissive and flexible organization with the goal of achieving a smooth and safe journey for the child in the perioperative path.

Evaluating the Quality of Systematic Reviews on Pediatric Sedation in Dentistry: An Umbrella Review

Sedation is a depression of a patient's state of consciousness, induced by medications, that can reach different levels of intensity during a medical procedure. Conscious sedation produces a minimally depressed level of consciousness without impairment of the ability to maintain an open airway, of protective reflexes or of responses to verbal and physical stimulation. This umbrella review is aimed at critically assessing the available systematic reviews (SRs) and meta-analyses (MA) on sedation in children/adolescents. An electronic database search was conducted that included Pubmed-Medline, Web of Science, Cochrane, Scopus, Scielo, Embase, LILACS and TRIP and the scope of which extended until January 2023. The risk of bias (RoB) of SRs was analyzed using the Measurement Tool to Assess SRs criteria 2 (AMSTAR2). Of 998 entries, 37 SRs were included. In terms of methodological quality, eight studies were assessed as having critically low quality, four studies had low quality, nine studies had moderate quality, and sixteen were considered to be of high quality. Based on the current guidelines, the most employed drugs in pediatric dentistry for sedation are nitrous oxide and midazolam; however, the available evidence supporting their use is insufficient and of low/critically low quality. The combined technique is recommended (nitrous oxide (30-50%) + midazolam). The optimal dose of oral midazolam is 0.75 mg/kg. The level of methodological quality of SRs is expected to increase according to the results and future directions of this umbrella review.

The Median Effective Dose of Dexmedetomidine for the Inhibition of Emergence Delirium in Preschool Children Undergoing Tonsillectomy and/or Adenoidectomy: A Retrospective Dose-response Trial

The incidence of emergence delirium (ED) is higher in preschool children undergoing tonsillectomy and/or adenoidectomy. The purpose of this study was to determine the median effective dose (ED50) of dexmedetomidine (DEX) for the inhibition of ED in preschool children by using probit regression analysis. A total of 140 anesthesia records were retrieved and divided into seven groups based on the infusion rate of DEX: .2, .25, .3, .35, .4, .45, and .5 μg·kg-1·h-1. The Pediatric Anesthesia Emergence Delirium Scale (PAEDS) was used to assess ED in preschool children, and ED was defined as a PAEDS score ≥ 10. Probit regression analysis revealed that the ED50 and ED95 of DEX were .31 μg·kg-1·h-1 (95% CI: .29-.35) and .48 μg·kg-1·h-1 (95% CI: .44-.56), respectively. Probit(p) = -2.84 + 9.28 × ln (Dose), (χ2 = 1.925, P = .859). The PAEDS score was significantly increased in the ED group, and the rate of bradycardia was significantly decreased in the ED group compared with the without ED group (27.3% vs 54.1%, P = .02). DEX can effectively inhibit the ED in preschool children undergoing tonsillectomy and/or adenoidectomy, however, bradycardia was the main complication.

Intranasal dexmedetomidine vs. oral midazolam for premedication in children: a systematic review and meta-analysis

Objective

To compare the effects of intranasal dexmedetomidine (Dex) and oral midazolam in the preoperative medication of children by using a method of meta-analysis.

Methods

Cochrane Library, Pubmed, Embase, and Web of Science were searched from inception to July 2023. Randomized controlled trials (RCTs) of intranasal Dex vs. oral midazolam in pediatric premedication were collected. Stata 15.0 statistical software was used to analyze the collected data. Relative risk (RR) and 95% confidence interval (CI) were used as effect sizes.

Results

A total of 11 studies with 824 children were included, containing 415 patients in the Dex group and 409 patients in the midazolam group. Compared with the oral midazolam group, the intranasal Dex group had a better preoperative sedation effect at parent-child separation (RR = 1.37, 95% CI: 1.14-1.64) and anesthesia induction (RR = 2.08, 95% CI: 1.03-4.22). In addition, there was no significant difference in the incidence of analgesia remedy (RR = 0.60, 95% CI: 0.36-1.00) the acceptance of anesthesia masks (RR = 0.97, 95% CI: 0.83-1.12), and incidence of adverse events between (RR = 0.25, 95% CI: 0.06-1.13, P = 0.072) between the intranasal Dex and oral midazolam groups.

Conclusion

Compared with oral midazolam, intranasal Dex has better sedative effects of parent-child separation and anesthesia induction in pediatric premedication, but there was no difference in the incidence of anesthesia remedy, anesthesia mask acceptance, and incidence of adverse events. Therefore, compared with oral midazolam, intranasal Dex is a better choice for premedication in children.

Risk factors of delirium in a paediatric intensive care unit: A prospective case series study

BACKGROUND

Delirium is one of the most common complications in critically ill children. Once delirium occurs, it will cause physical and psychological distress in children and increase the length of their ICU stay and hospitalization costs. Understanding the risk factors for delirium in critically ill children can help develop targeted nursing interventions to reduce the incidence of delirium.

AIMS

To investigate the incidence and the risk factors of delirium in the paediatric intensive care unit (PICU).

STUDY DESIGN

We performed a prospective observational study in critically ill patients in the PICU between February and July 2020. Delirium was diagnosed by the Cornell Assessment of Paediatric Delirium (CAPD) and the Richmond Agitation Sedation Scale and analysed via univariate analysis and multivariate logistic regression to determine the independent risk factors of delirium in critically ill children.

RESULTS

The study enrolled 315 patients ranging in age from 1-202 (65.3-54.3) months, with 56.2% (n = 177) being male. The incidence of delirium was 29.2% (n = 92) according to CAPD criteria. Among them, 33 cases (35.9%) were of hyperactive delirium, 16 cases (17.4%) were of hypoactive delirium, and 43 cases (46.7%) were of mixed delirium. By using stepwise logistic regression, the independent risk factors of delirium included mechanical ventilation (odds ratio [OR], 11.470; 95% confidence interval [CI], 4.283-30.721), nervous system disease (OR, 5.596; 95%CI, 2.445 to 12.809), developmental delay (OR, 5.157; 95% CI, 1.990-13.363), benzodiazepine (OR, 3.359; 95% CI 1.278-8.832), number of catheters (OR, 1.918; 95% CI, 1.425 to 2.582), and age (OR, 0.985; 95% confidence interval CI, 0.976-0.993).

CONCLUSIONS

Delirium is a common complication in the PICU. The independent risk factors include mechanical ventilation, nervous system disease, developmental delay, benzodiazepines, higher number of catheters, and younger age. This study may help develop intervention strategies to reduce the incidence of delirium in critically ill children by targeting modifiable risk factors.

RELEVANCE TO CLINICAL PRACTICE

Recommendations for practice include paying attention to high-risk children in the ICU who are prone to delirium, removing influencing factors as soon as possible, and providing targeted nursing interventions.

The effect of a parental preparation video (Take5) on child and parent anxiety during anaesthetic induction: a protocol for a randomised controlled trial

BACKGROUND

Children undergoing anaesthetic induction experience peri-operative anxiety associated with negative outcomes including emergence delirium, short- and long-term maladaptive behaviour and increased postoperative analgesic requirements. This stems from children's limited ability to communicate, cope, and regulate intense emotions, leading to high dependency on parental emotional regulation. Previous interventions including video modelling, education and distraction techniques before and during anaesthetic induction have demonstrated significant reduction of anxiety levels. No existing interventions combines evidenced-based psychoeducation video with distraction techniques to support parents to moderate peri-operative anxiety. This study aims to test the efficacy of the Take5 video (now referred to as 'Take5'), a short and cost-efficient intervention for child peri-operative anxiety.

METHODS

A randomised, controlled, superiority trial of Take5 compared to standard care. Take5 was developed by paediatric anaesthetists, child psychologists and a consumer panel of parents of children who had experienced surgery and anaesthesia. Children aged 3-10 years presenting for elective surgery at a quaternary paediatric facility will be randomly allocated to the intervention group or standard care. Intervention group parents will be shown Take5 prior to accompanying their child for anaesthesia induction. Primary outcomes include child and parent anxiety at induction, measured by the Modified Yale Preoperative Anxiety Scale Short Form (mYPAS-SF), the Peri-operative Adult-Child Behavior Interaction Scale (PACBIS) and the Induction Compliance Checklist (ICC). Secondary outcomes include post-operative pain, emergence delirium, parental satisfaction, cost-effectiveness, parent and child psychological well-being at 3 months post procedure and video intervention acceptability.

DISCUSSION

Perioperative anxiety is associated with negative outcome in children including higher pharmacological intervention, delayed procedures, and poor post-recovery outcomes resulting in financial burden on health systems. Current strategies minimising paediatric procedural distress are resource-intensive and have been inconsistent in reducing anxiety and negative postoperative outcomes. The Take5 video is an evidence-driven resource that is designed to prepare and empower parents. The success of Take5 will be evaluated by measuring differences in patient (acute and 3-month), family (satisfaction, acceptability), clinician (feasibility) and health service (cost) outcomes, with each anticipated to benefit children.

TRIAL REGISTRATION

Australian and New Zealand Clinical Trial Registry (ACTRN12621001337864) and Children's Health Queensland Hospital and Health Service Human Research Ethics Committee (HREC/21/QCHQ/73894).

Comparative Evaluation of Intranasal Dexmedetomidine Spray Versus Intranasal Normal Saline Spray in Patients Undergoing Transalveolar Extractions for Anxiety Reduction: A Randomized Control Study

Background

Dexmedetomidine has dose-dependent selectivity for alpha 2 adrenoceptors. It is a good sedative with analgesic characteristics and good haemodynamic stability. Intranasal sedation is a non-invasive medication delivery method that is both safe and well accepted by both children and adults. One of the most common procedures in maxillofacial surgery is transalveolar extraction. In minor oral surgery, a painless transalveolar extraction with little post-operative pain would be ideal.

Aim

To examine the effectiveness of intranasal dexmedetomidine spray against intranasal normal saline spray in patients undergoing transalveolar extractions for anxiety relief.

Method

We compared sedation effect by Ramsay sedation scale, analgesia by visual analogue scale, monitored BP and pulse rate for anxiety, and spo2 levels for any complication in this prospective double-blinded randomized control study for two groups, A group with intranasal dexmedetomidine spray and the B group of intranasal NS spray for placebo effect at 0 min, 15 min, 30 min, and 45 min until transalveolar extraction.

Result

As a result of the intranasal spray of dexmedetomidine, there were no related problems such as respiratory depression. There was a substantial difference in sedation and analgesia between group A and the placebo group, as well as a significant decrease in pulse rate and hypotension in the dexmedetomidine group to reduce anxiety.

Conclusion

Intranasal injection of atomized dexmedetomidine (1.5 mcg/kg) for patient sedation having transalveolar extractions or other minor surgical operations in oral and maxillofacial surgery is clinically effective, convenient, lowers anxiety, and safe.Clinical Trial Registration: No. CTRI/2021/07/035181.

A new view on old problems in paediatric anaesthesia: premedication, postoperative agitation and dosing

PURPOSE OF REVIEW

The aim of this review is to discuss recent developments in paediatric anaesthesia, which have evolved in an undulating fashion.

RECENT FINDINGS

The role and efficacy of pharmacological premedication is reevaluated. The anxiolytic and sedative properties of midazolam and α 2 -agonists have now been defined more precisely. Both classes of drugs have their unique profile, and there is no reason to condemn one or the other. Midazolam is an excellent anxiolytic, whereas dexmedetomidine is superior in the postoperative period and for sedation during diagnostic imaging.A total intravenous technique with propofol is often considered to be the standard for the prevention of emergence agitation; but alternatives do exist, such as a co-medication with dexmedetomidine or opioids. In clinical reality, a multimodal approach may often be advisable.The theoretical basis for propofol dosing has recently been adapted. In contrast to previous beliefs, the context-sensitive half-life of propofol seems to be quite short beyond the first year of life.

SUMMARY

Midazolam and dexmedetomidine are not interchangeable; each compound has its pros and cons. As an anxiolytic drug, midazolam indisputably deserves its place, whereas dexmedetomidine is a better sedative and particularly beneficial in the postoperative period. New data will allow more precise age-adapted dosing of propofol.

The optimum time for intravenous cannulation after induction with sevoflurane in children premedicated with dexmedetomidine

BACKGROUND

Inhalation anesthesia is a frequently used method for anesthesia induction, especially in young children. No information is available on the optimum time for safe intravenous cannulation after inhalational induction in children with dexmedetomidine premedication. The purpose of the present study was to determine the optimal time for intravenous cannulation after induction of anesthesia with sevoflurane and nitrous oxide in children premedicated with intranasal dexmedetomidine.

METHODS

This prospective and observational study was conducted by using the up-down sequential method. Children, who were aged 2-6 years with ASA physical status I, and who underwent inhalation induction for elective surgery were included in the study. Anesthesia was induced with sevoflurane and nitrous oxide after the premedication with intranasal dexmedetomidine (2 mcg/kg). Intravenous cannulation was attempted on the dorsum of the hand by an experienced anesthesiologist 4 min after the loss of the eyelash reflex in the first patient. The procedure was considered successful in patients without any movement, cough, or laryngospasm. The waiting time for cannulation was increased by 15 s if the procedure was not successful in the previous patient, and on the contrary, it was reduced by 15 s if the procedure was successful in the previous patient. The probit test was used in the analysis of up-down sequences.

RESULTS

In the present study in which a total of 40 patients were included, the effective cannulation time was found to be 14.40 s (95% confidence limits, 1.30-27.82 s) in 50% of the patients, and the effective cannulation time was found as 84.64 s (95% confidence limits, 69.61-218.26 s) in 95% of the patients.

CONCLUSIONS

In conclusion, we suggest that the appropriate time for cannulation is 85 s (1.45 min) after the loss of eyelash reflex in children sedated with dexmedetomidine and induction with sevoflurane and nitrous oxide-oxygen mixture.

A comprehensive evaluation between dexmedetomidine and midazolam for intraoperative sedation in the elderly: protocol for a systematic review and meta-analysis of randomized controlled trials

BACKGROUND

The sedative effect of intraoperative sedation in elderly surgery exerts critical influence on the prognosis. Comparison on the safety and efficacy between dexmedetomidine and midazolam in many clinical randomized controlled trials (RCTs) was inconsistent and suspicious. We aim to comprehensively evaluate the safety and efficacy between dexmedetomidine and midazolam for intraoperative sedation in the elderly via meta-analysis and systematic reviews.

METHODS

RCTs regarding to the comparison of sedative effects and safety between dexmedetomidine and midazolam in elderly patients (aged ≥ 60 years) will be comprehensively searched from 2000 October to 2022 May through 4 English databases and 4 Chinese databases. After extraction in duplicate, the systematic review and meta-analysis will be performed on the primary outcomes (hemodynamic changes, sedative effect, cognitive function) and secondary outcomes (analgesic effect, surgical characteristics, complications, or adverse reactions) for assessing the two therapy methods using Review Manager software (Version 5.3). Sensitivity analysis will be conducted to evaluate the heterogeneity of the results; funnel plot and Egger's trial will be performed to analyze publication bias of the included studies, and trial sequential analysis will be applied to assess the robustness and reliability of preliminary meta-analysis results. Finally, rating quality of evidence and strength of recommendations on the meta results will be summarized by Grading of Recommendations, Assessment, Development and Evaluations (GRADE) approach.

DISCUSSION

This systematic review and meta-analysis will evaluate the safety and efficacy between dexmedetomidine and midazolam for intraoperative sedation in the elderly; it will give an insight on the application of dexmedetomidine and midazolam and will provide evidence-based reference for clinical decision-making.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO CRD42021221897.

A Perioperative Intervention to Prevent and Treat Emergence Delirium at a Veterans Affairs Medical Center

Emergence delirium (ED) is a temporary condition associated with a patient awakening from an anesthetic and/or adjunct agent (e.g., sedatives and analgesics). During the condition, patients risk harming themselves or staff by engaging in dangerous behavior, which may include thrashing, kicking, punching, and attempting to exit the bed/table. A multidisciplinary team at Veterans Affairs Pittsburgh Healthcare System (VAPHS) developed and implemented a multicomponent intervention to reduce the severity and occurrence of ED. The intervention consists of a training component and 21 clinical components. The 21 clinical components are implemented on a patient-by-patient basis and include routine screening for risk factors, enhanced communication among staff, adjusting the environment, following a specific medication strategy, and application of manual restraint (hands-on). The authors provide 15 online Supplemental Materials (S1–S15) to promote replication of the intervention. To our knowledge, this is the first manuscript that describes this type of multicomponent intervention in sufficient detail to allow others to replicate it. Following implementation of the intervention at VAPHS, perioperative staff reported that they observed a substantial reduction in the occurrence and severity of ED, ED-related patient and staff injuries, and ED-related loss of intravenous access and airway patency. Despite staff’s reported success of the intervention, rigorous research is needed to evaluate the efficacy of the intervention.

Online Supplement to “A Perioperative Intervention to Prevent and Treat Emergence Delirium at a Veteran Affairs Medical Center”

This supplementary material was provided by the authors to give readers additional information and resources to replicate their work.

What Is the Role of Dexmedetomidine in Modern Anesthesia and Critical Care?

Dexmedetomidine's unique sedative properties have led to its widespread use. Dexmedetomidine has a beneficial pharmacologic profile including analgesic sparing effects, anxiolysis, sympatholysis, organ-protective effects against ischemic and hypoxic injury, and sedation which parallels natural sleep. An understanding of predictable side effects, effects of age-related physiologic changes, and pharmacokinetic and pharmacodynamic effects of dexmedetomidine is crucial to maximize its safe administration in adults and children. This review focuses on the growing body of literature examining advances in applications of dexmedetomidine in children and adults.

[Risk factors for delirium after sedation in children with convulsion and establishment of a nomogram model for predicting the risk of delirium]

OBJECTIVES

To investigate the risk factors for delirium after sedation in children with convulsion, and to establish a nomogram model for predicting the risk of delirium.

METHODS

A total of 373 children with convulsion who were hospitalized in the pediatric ward of the Second Affiliated Hospital of Air Force Medical University from August 2020 to January 2022 were prospectively enrolled. There were 245 children in the modeling group and 128 children in the validation group. A multivariate logistic regression analysis was used to identify independent predictive factors for delirium after sedation and establish a nomogram model for predicting the risk of this disorder based on these factors. The calibration curve, the receiver operating characteristic curve, and the decision curve analysis were used to evaluate the accuracy, discriminatory ability, and clinical application value of this model, respectively.

RESULTS

The incidence of delirium after sedation was 22.3% (83/373) in the children with convulsion. The multivariate logistic regression analysis showed that age>5 years (OR=0.401, P<0.05) was a protective factor against delirium after sedation in these children, while presence of infection (OR=3.020, P<0.05), admission to the pediatric intensive care unit (OR=3.126, P<0.05), use of benzodiazepines (OR=5.219, P<0.05), history of status convulsion (OR=2.623, P<0.05), and history of delirium episodes (OR=3.119, P<0.05) were risk factors for delirium. The H-L deviation test of the nomogram prediction model showed a good degree of fit (χ2=9.494, P=0.302). Internal and external validation showed that the mean absolute errors between the actual and predicted values of the calibration curve were 0.030 and 0.018, respectively, and the areas under the receiver operating characteristic curve were 0.777 and 0.775, respectively. The decision curve analysis showed that the model provided significant net clinical benefit when the predicted risk threshold was >0.01.

CONCLUSIONS

Age, presence of infection, admission to the pediatric intensive care unit, use of benzodiazepines, history of status convulsion, and history of delirium episodes are closely associated with the development of delirium after sedation in children with convulsion. The nomogram model for predicting this disorder that is established based on these factors has relatively high accuracy, discriminatory ability, and clinical application value.

Dexmedetomidine and perioperative analgesia in children

Dexmedetomidine (DEX) is an anaesthetic agent that mimics natural deep sleep and produces minimal cardiorespiratory depression. As such, it is a very valuable option in the management of such a challenging population as paediatric patients. The main objective of this mini review was to evaluate the role of DEX as a perioperative analgesic in children receiving anaesthesia. We searched Google, Pubmed, Embase and the Cochrane Library for articles published between 2010 and 2021, and reviewed various of aspects of DEX, such as pharmacology, effectiveness, safety, and the most recent evidence on its clinical use as an analgesic in paediatric anaesthesia. We also include a cost estimate of perioperative analgesia with DEX.

Efficacy of dexmedetomidine versus midazolam when combined with butorphanol for sedation and analgesia during burn dressing changes: A randomized clinical trial

Objective: The aim of this study was to compare dexmedetomidine-butorphanol (DB) and midazolam-butorphanol (MB) combinations for sedation, and analgesia in burn patients undergoing dressing changes.

Methods: A total of 56 ASA I–II burn patients were included in this single-center randomized clinical trial. The ages of these patients were between 20 and 60 years. TBSA ranged from 10% to 50%. They were randomized to group DB and group MB during dressing change. In the DB group, each patient received a bolus dose of dexmedetomidine (0.5 μg kg−1) and intermittent boluses of butorphanol (20 μg kg−1). In the MB group, each patient received a bolus dose of midazolam (0.05 mg kg−1) and intermittent boluses of butorphanol (20 μg kg−1). The primary outcomes were sedation scores and pain scores. The second outcomes were vital signs, side effects, and butorphanol consumption.

Results: The sedation scores of these two groups did not differ significantly (p &gt; 0.05), and the pain scores of these groups were not significantly different (p &gt; 0.05). More patients had hypotension in the DB group than in the MB group (6 versus 0, p = 0.01), but the number of patients who had respiratory depression was higher in the MB group compared with the DB group (4 versus 0, p = 0.038). Butorphanol consumption in the MB group was higher than in the DB group (p = 0.025).

Conclusion: Dexmedetomidine is comparable to midazolam when combined with butorphanol in burn patients during dressing change. Compared with midazolam, it has the advantage of opioid-sparing effect.

Clinical Trial Registration: [http://www.chictr.org.cn/showproj.aspx&amp;proj=130622], identifier [ChiCTR2100049325].

Best Evidence-Based Dosing Recommendations for Dexmedetomidine for Premedication and Procedural Sedation in Pediatrics: Outcome of a Risk-Benefit Analysis By the Dutch Pediatric Formulary

BACKGROUND

Dexmedetomidine is currently off-label for use in pediatric clinical care worldwide. Nevertheless, it is frequently prescribed to pediatric patients as premedication prior to induction of anesthesia or for procedural sedation. There is ample literature on the pharmacokinetics, efficacy and safety of dexmedetomidine in this vulnerable patient population, but there is a general lack of consensus on dosing. In this project, we aimed to use the standardized workflow of the Dutch Pediatric Formulary to establish best evidence-based pediatric dosing guidelines for dexmedetomidine as premedication and for procedural sedation.

METHOD

The available literature on dexmedetomidine in pediatrics was reviewed in order to address the following three questions: (1) What is the right dose? (2) What is known about efficacy? (3) What is known about safety? Relevant literature was compiled into a risk-benefit analysis document. A team of clinical experts critically appraised the analysis and the proposed dosing recommendations.

RESULTS

Dexmedetomidine is most commonly administered via the intravenous or intranasal route. Clearance is age dependent, warranting higher doses in infants to reach similar exposure as in adults. Dexmedetomidine use results in satisfactory sedation at parent separation, adequate sedation and a favorable recovery profile. The safety profile is good and comparable to adults, with dose-related hemodynamic effects.

CONCLUSION

Following the structured approach of the Dutch Pediatric Formulary, best evidence-based dosing recommendations were proposed for dexmedetomidine, used as premedication prior to induction of anesthesia (intranasal dose) and for procedural sedation (intranasal and intravenous dose) in pediatric patients.

Preoperative anxiety in preschool children: A randomized clinical trial comparing midazolam, clonidine, and dexmedetomidine

INTRODUCTION

Anxiety in pediatric patients may challenge perioperative anesthesiology management and worsen postoperative outcomes. Sedative drugs aimed to reducing anxiety are available with different pharmacologic profiles, and there is no consensus on their effect or the best option for preschool children. In this study, we aimed to compare the effect of three different premedications on anxiety before anesthesia induction in preschool children aged 2-6 years scheduled for elective surgery. The secondary outcomes comprised distress during peripheral catheter (PVC) insertion, compliance at anesthesia induction, and level of sedation.

PATIENTS AND METHODS

In this double-blinded randomized clinical trial, we enrolled 90 participants aged 2-6 years, who were scheduled for elective ear-, nose-and-throat surgery. The participants were randomly assigned to three groups: those who were administered 0.5 mg/kg oral midazolam, 4 µg/kg oral clonidine, or 2 µg/kg intranasal dexmedetomidine. Anxiety, distress during PVC insertion, compliance with mask during preoxygenation, and sedation were measured using the modified Yale Preoperative Anxiety Scale, Behavioral Distress Scale, Induction Compliance Checklist, and Ramsay Sedation Scale, respectively.

RESULTS

Six children who refused premedication were excluded, leaving 84 enrolled patients. At baseline, all groups had similar levels of preoperative anxiety and distress. During anesthesia preparation, anxiety was increased in the children who received clonidine and dexmedetomidine; however, it remained unaltered in the midazolam group. There were no differences in distress during PVC insertion or compliance at induction between the groups. The children in the clonidine and dexmedetomidine groups developed higher levels of sedation than those in the midazolam group.

CONCLUSIONS

In preschool children, midazolam resulted in a more effective anxiolysis and less sedation compared to clonidine and dexmedetomidine.

Dexmedetomidine as an adjunctive treatment for acute asthma

Objective

This study aimed to compare the efficacy of using dexmedetomidine with salbutamol and salbutamol nebulization alone in patients with acute exacerbation of asthma presenting to the emergency department.

Methods

This clinical trial included 60 patients, in the age range of 18 to 55 years, with signs of bronchospasm presenting to the emergency department. In the intervention group, dexmedetomidine 0.5 µg/kg was injected intravenously and three doses of salbutamol nebulization were administered over 60 minutes. In the control group, salbutamol nebulization was administered for 60 minutes three times. The patient’s clinical status, based on clinical symptoms, consciousness, speech, breathing rate, heart rate, and blood pressure were recorded before the intervention, and peak expiratory flow rate and forced expiratory volume in 1 second were measured at 20, 40, and 60 minutes after intervention. Patients who did not respond to the intervention were excluded from the study within 60 minutes.

Results

The increased mean forced expiratory volume in 1 second and mean peak expiratory flow rate were found to be similar in both groups during the treatment (P=0.304). The mean systolic and diastolic blood pressure recorded at 40 and 60 minutes were significantly lower in the intervention group. During this study, no patient was excluded before 60 minutes.

Conclusion

Administration of dexmedetomidine in addition to standard salbutamol treatment has no beneficial effect in patients with acute asthma attacks and merely causes hypotension in patients.

Dexmedetomidine & perioperative analgesia in children

Dexmedetomidine (DEX) is an anaesthetic agent that mimics natural deep sleep and produces minimal cardiorespiratory depression. As such, it is a very valuable option in the management of such a challenging population as paediatric patients. The main objective of this mini review was to evaluate the role of DEX as a perioperative analgesic in children receiving anaesthesia. We searched Google, Pubmed, Embase and the Cochrane Library for articles published between 2010 and 2021, and reviewed various of aspects of DEX, such as pharmacology, effectiveness, safety, and the most recent evidence on its clinical use as an analgesic in paediatric anaesthesia. We also include a cost estimate of perioperative analgesia with DEX.

Comparison the Oral Premedication of Midazolam, Dexmedetomidine, and Melatonin for Children's Sedation and Ease of Separation from Parents before Anesthesia

Background:

Children’s fear of surgery and preoperative separation from parents can contribute to anxiety and distress in children undergoing surgery. The study addressed the comparable efficacy of oral premedication of midazolam, dexmedetomidine, and melatonin to alleviate preoperative anxiety and easing the children’s separation from parents.

Materials and Methods:

A double-blinded trial enrolled three equal-sized groups of children (n = 153, aged 2–10 years) undergoing elective surgery who received oral midazolam, melatonin, and dexmedetomidine 30 min before induction. The observation sedation score, and ease of separation, acceptance of drug both preceding and following premedication administration were assessed and recorded every 5min till anesthesia induction.

Results:

A significant difference was observed in the mean scores of sedation before premedication and after separation from parents, as well as in the degree of the separation when comparing between the midazolam and melatonin groups and the dexmedetomidine and melatonin groups (P < 0.001). The scores were significantly lower in the melatonin group than the other two groups, whereas no significant difference was found in those between the midazolam and dexmedetomidine groups, as well as in the acceptance of anesthesia induction between the midazolam and melatonin groups (P = 0.250). The differences were significant between the midazolam and dexmedetomidine groups (P = 0.002) and melatonin and dexmedetomidine groups (P < 0.001) and anesthesia induction was effective in the dexmedetomidine group than that in the other two groups.

Conclusion:

Dexmedetomidine is more effective in acceptance of anesthesia induction. Furthermore, the midazolam and dexmedetomidine groups indicated better ease of separation and sedation scores than melatonin.

Ketamine Enhances Intranasal Dexmedetomidine-Induced Sedation in Children: A Randomized, Double-Blind Trial

Purpose

To compare the efficacy of intranasal dexmedetomidine and dexmedetomidine-ketamine premedication in preschool children undergoing tonsillectomy.

Patients and Methods

We enrolled 66 children with American Society of Anesthesiologists physical status I or II, aged 3–7 years undergoing tonsillectomy. Patients were randomly allocated to receive intranasal premedication with either dexmedetomidine 2 μg kg⁻¹ (Group D) or dexmedetomidine 2 μg kg⁻¹ and ketamine 2 mg kg⁻¹ (Group DK). The primary outcome was the sedation level assessed by the Modified Observer’s Assessment of Alertness/Sedation Scale (MOAA/S) 30 min after intervention. The minimal clinically relevant difference in the MOAA/S score was 0.5. Secondary outcomes included sedation onset time, parental separation anxiety, acceptance of mask induction, emergence time, emergence delirium, postoperative pain intensity, length of stay in the post-anesthesia care unit (PACU), and adverse effects.

Results

At 30 min after premedication, the MOAA/S score was lower in Group DK than in Group D patients (median: 1.0, interquartile range [IQR]: 1.0–2.0 vs median: 3.0, IQR: 2.0–3.0; P<0.001), with a median difference of 1.0 (95% confidence interval [CI]: 1.0–2.0, P<0.001). Patients in Group DK showed considerably faster onset of sedation (15 min, 95% CI: 14.2–15.8 min) than Group D (24 min, 95% CI: 23.2–24.8 min), with a median difference of 8.0 min (95% CI: 7.0–9.0 min, P<0.001). Both parental separation and facemask acceptance scores were lower in Group DK than in Group D patients (P=0.012 and P=0.001, respectively). There was no significant difference in emergence time, incidence of emergence delirium, postoperative pain scores, and length of stay in the PACU between the two groups.

Conclusion

Intranasal premedication with a combination of dexmedetomidine and ketamine produced better sedation for pediatric tonsillectomy than dexmedetomidine alone.

A comparative evaluation of dexmedetomidine and midazolam in pediatric sedation: A meta-analysis of randomized controlled trials with trial sequential analysis

Background

The present study with trial sequential analysis (TSA) was conducted to evaluate comprehensively the efficacy and safety of dexmedetomidine and midazolam in pediatric sedation, and to investigate whether the outcomes achieved the required information size to draw the conclusions.

Methods

PubMed, Embase, and Cochrane Library were searched from inception to October 2019. All randomized controlled trials used dexmedetomidine and midazolam in pediatric sedation were enrolled. Sedative efficacy, postoperative analgesic effect, and incidence of emergence agitation were considered as the co‐primary outcomes. Grading of Recommendations Assessment, Development, and Evaluation (GRADE) system was applied to rate the quality of evidences.

Results

We acquired data from 34 studies involving 2281 pediatric patients. The results indicated that administration of dexmedetomidine was associated with less incidence of emergence agitation (RR = 0.78, with 95% CI [0.65, 0.92]) and more satisfactory sedation at parental separation (RR = 0.31, with 95% CI [0.24, 0.41]) compared to midazolam, and the current sample sizes were sufficient with unnecessary further trials. Two groups did not differ significantly in sedation level at mask induction (RR = 0.86, with 95% CI [0.74, 1.00]). And using of dexmedetomidine was associated with less incidence of postoperative analgesic rescue (RR = 0.57, with 95% CI [0.35, 0.93]), but the number of patients was too few to achieve the required information size and to draw reliable conclusions. Premedication of dexmedetomidine was associated with significant less value of SBP, heart rate, increased incidence of bradycardia, and a lower rate of shivering. And there were no differences about onset of sedation and recovery time between two groups.

Conclusions

Given that more satisfactory sedation at separation from parents and less incidence of emergence agitation, dexmedetomidine is preferred for pediatric sedation. However, compared with midazolam, the superiority of dexmedetomidine in providing adequate sedation at mask induction and postoperative analgesic effects has not yet been defined.

Efficacy and Safety of Midazolam Oral Solution for Sedative Hypnosis and Anti-anxiety in Children: A Systematic Review and Meta-Analysis

Background: Midazolam is recommended by health guidelines for sedation and hypnosis in children. Oral solution is a suitable dosage form for children. But there is no conclusive evidence for sedative-hypnosis and antianxiety effects by midazolam oral solution in children. Methods: Relevant studies were identified through searching PubMed, Embase, Cochrane Library, CINAHL, International Pharmaceuticals, four Chinese electronic databases, and relevant lists. Two reviewers independently selected trials, assessed trial quality, and extracted the data. Results: Eighty-nine randomized controlled trials (RCTs) comparing midazolam oral solution with placebo or blank (n = 33), dexmedetomidine (n = 15), ketamine (n = 11), different midazolam doses (n = 10), midazolam injection (n = 8), chloral hydrate (n = 7), diazepam (n = 5), N2O (n = 5), triclofos (n = 4), butorphanol (n = 2), fentanyl (n = 2), hydroxyzine (n = 1), and thiopental (n = 1) were identified. Meta-analysis showed no significant difference in the success rate and duration of sedation and hypnosis between midazolam oral and injectable solution (P > 0.05). The success rate of sedation and hypnosis of midazolam was higher than that of ketamine [risk ratio (RR) = 1.32, 95% CI (1.07, 1.62), I 2 = 0%, P < 0.01]. No significant difference was found in the success rate of sedation and hypnosis, mask acceptance, and parental separation between midazolam oral solution and dexmedetomidine (P > 0.05), and the result of one cohort study was consistent. The results of RCTs and a prospective cohort study showed that the incidence of adverse drug reactions (ADR) was 19.57% (189/966). Incidence of adverse reactions between dose groups of (0.25, 0.5] and (0.5, 1.0] mg/kg was similar [Pf (95% CI) = 0.10 (0.04, 0.24) and Pf (95% CI) = 0.09 (0.02, 0.39), respectively], higher than that of the dose group of (0, 0.25] mg/kg [Pf (95% CI) = 0.01 (0.00, 0.19)]. Conclusions: Available evidence suggests that midazolam oral solution is as good as midazolam injection and dexmedetomidine and is better than ketamine. Based on efficacy and safety results, an oral midazolam solution dose of 0.5-1 mg/kg is recommended for children.

A Comparison of Intranasal Dexmedetomidine and Dexmedetomidine Plus Buccal Midazolam for Non-painful Procedural Sedation in Children with Autism

Children with autism often need sedation for diagnostic procedures and they are often difficult to sedate. This prospective randomized double-blind control trial evaluates the efficacy and safety using intranasal dexmedetomidine with and without buccal midazolam for sedation in children with autism undergoing computerized tomography and/or auditory brainstem response test. The primary outcome is the proportion of children attaining satisfactory sedation. One hundred and thirty-six children received intranasal dexmedetomidine and 139 received intranasal dexmedetomidine with buccal midazolam for sedation. Combination of intranasal dexmedetomidine and buccal midazolam was associated with higher sedation success when compared to intranasal dexmedetomidine. Since intranasal and buccal sedatives required little cooperation this could be especially useful technique for children with autism or other behavioral conditions.

The comparison of dexmedetomidine and midazolam premedication on postoperative anxiety in children for hernia repair surgery: A randomized controlled trial

BACKGROUND

Perioperative anxiety is common in pediatric patients undergoing surgery.

AIMS

The aim of this study was to determine whether an infusion of dexmedetomidine prior to hernia repair in children provides better postoperative anxiety outcomes that a preoperative infusion of midazolam.

METHODS

Ninety 6-11-year-old children, who were scheduled to undergo elective hernia repair, were enrolled for this double-blind, randomized controlled trial. Group D (n = 45) received an intravenous infusion of dexmedetomidine (0.5 μg/kg) and Group M (n = 45) received an intravenous infusion of midazolam (0.08 mg/kg) in 20 mL of normal saline for 10 minutes before the induction of anesthesia. Pre- and postoperative scores on the modified Yale Preoperative Anxiety Scale were the main outcomes. Secondary outcomes included systolic blood pressure, diastolic blood pressure, heart rate, and postoperative pain measured on a visual analogue scale and patient satisfaction using a numerical rating scale.

RESULTS

Postoperative anxiety in Group D was significantly lower than preoperative anxiety (2 hours postoperatively mean difference [95% CI]: 2.83 [0.87-4.79], P = 0.036, 4 hours postoperatively mean difference [95% CI]: 3.29 [1.39-5.20], P = 0.005). Preoperative and postoperative anxiety in Group M was similar. Anxiety scores in Group D were also significantly lower than anxiety in Group M 2 hours (mean difference [95% CI]: 1.89 [0.52-3.26], P = 0.01) and 4 hours (mean difference [95% CI]: 3.32 [1.98-4.66], P < 0.001) postoperatively. Systolic blood pressure, diastolic blood pressure and heart rate were lower in Group D than in Group M after administration of sedative drugs until children left PACU (SBP mean difference [95% CI]: 13.87 [10.30-17.43], P < 0.001, DBP mean difference [95% CI]: 5.96[3.80-8.11], P < 0.001, HR mean difference [95% CI]: 10.36 [7.58-13.13], P < 0.001). Pain was also significantly lower in Group D than in Group M at 2 hours (median difference [95% CI]: 1 [0.26-1.34], P = 0.004), 4 hours (median difference [95% CI]: 1 [0.31-1.02], P = 0.003), and 1 day (median difference [95% CI]: 0 [0.22-0.76], P = 0.003) postoperatively. Patient satisfaction scores were significantly higher in Group D than in Group M 1 day (median difference [95% CI]: 0 [-0.83 to -0.24], P = 0.006) and somewhat higher 1 week (median difference [95% CI]: 0 [-0.67 to -0.04], P = 0.06) postoperatively.

CONCLUSION

Compared with midazolam, a single preoperative intravenous dose of dexmedetomidine appears to provide better postoperative anxiolytic effects for children undergoing same-day surgery.

Effect of dexmedetomidine anesthesia on respiratory function in pediatric patients undergoing retinoblastoma resection

The aim of this study was to investigate the effect of dexmedetomidine (Dex) on the respiratory function during anesthesia induction in pediatric patients undergoing retinoblastoma (RB) resection. A total of 87 pediatric patients who underwent RB resection in Yidu Central Hospital of Weifang were recruited into this study. General anesthesia was first induced for all patients, of which 45 were randomly assigned to the experimental group and received Dex through an intravenous infusion pump to maintain general anesthesia. The remaining 42 patients were assigned to the control group and received saline through an intravenous infusion pump. Respiratory function and hemodynamic indexes at five time-points, i.e., before anesthesia induction (T0), 5 min after injection of anesthetic agents (T1), before intubation (T2), 15 min after intubation (T3), and 30 min after extubation (T4), were recorded and compared. Incidence of perioperative cardiac and respiratory adverse events was counted in both groups, and post-anesthesia resuscitation was evaluated and compared. Compared with T0, the respiratory rate (R) of the experimental group was lower at T1-T4, but there was no statistical difference (P<0.05). Compared with T0, the control group had a higher R at T2, lower R at T3 and T4 (P<0.05), and there was no significant difference in R between T0 and T1 (P>0.05). At the same time-point, compared with the experimental group, the R was higher at T2, and lower at T3 and T4 in the control group (P<0.05), and no significant difference was found at T1. Blood oxygen saturation (SpO₂) of the experimental group was slightly lower than that of T0 at T1-T4 (P>0.05). In the control group, the levels of SpO₂ were significantly lower at T1-T4 than those at T0 (P<0.05). Compared with the experimental group at the same time-point, SpO₂ of the control group at T1-T4 decreased significantly (P<0.05). The heart rate (HR) of the experimental and control groups was lower at T1-T4 than that at T0 (P<0.05). The HR of the experimental group was higher than that of the control group at T1-T4 (P<0.05). Mean arterial pressure (MAP) of the experimental and control groups was lower at T1-T4 than that at T0 (P<0.05). MAP of the control group was higher than that of the experimental group at T2 but lower than that at T0 of the control group. MAP of the control group was lower than that of the experimental group at T1-T4. There was no significant difference in incidence of tachycardia, bradycardia, vomiting, hypoxia and laryngism between the two groups (P>0.05). There was no difference in resuscitation and extubation time between the two groups (P>0.05). Finally, agitation of the control group was more severe than that of the experimental group (P<0.05). Therefore, Dex can improve the respiratory function and hemodynamic stability during anesthesia induction in children with RB resection.

Premedication and Induction of Anaesthesia in paediatric patients

Perioperative anxiety has been associated with adverse clinical outcomes such as emergence delirium, increased analgesic requirements and negative postoperative behavioural changes such as sleep disturbance, separation anxiety, eating problems and new-onset enuresis. Predictors of preoperative anxiety have been identified, and these include, among other factors, the age and temperament of the child. Any plan for anaesthetic induction in a child must take into account these factors. The anaesthetic plan must be individualised for special situations, for example, the child with behavioural disorder or at risk of aspiration. This article details the pharmacological and nonpharmacological methods to minimise preoperative anxiety and the techniques of anaesthetic induction in infants and children undergoing surgery. The benefits and limitations of inhalational and intravenous induction and the current status of rapid sequence induction in children are discussed. MEDLINE database was searched for this narrative review using the keywords including preoperative anxiety, child, premedication, paediatric and anaesthetic induction. Search was restricted to articles in English, but without any publication date restrictions.

A comparison of midazolam and zolpidem as oral premedication in children, a prospective randomized double-blinded clinical trial

BACKGROUND

Anxiety associated with pediatric surgery can be stressful. Midazolam is a well-accepted anxiolytic in this setting. However, there are cases in which this medication is not effective. Zolpidem is a short-acting nonbenzodiazepine hypnotic drug that is administered orally and has quick onset of action (~15 minutes), and 2-3 hour duration.

AIMS

Based on the theory that impaired perception following oral zolpidem administration would suppress the development of anxiety, we sought to compare zolpidem to midazolam for pediatric preoperative anxiety.

METHODS

This prospective randomized double-blinded clinical trial was designed to compare the effectiveness of oral midazolam and zolpidem for anxiety premedication. Eighty ASA class I-II pediatric patients between 2 and 9 years old, surgery >2 hours, and at least 23 hours postoperative admission were included in the study. Randomization was done with 0.5 mg/kg midazolam or 0.25 mg/kg zolpidem administered orally. The primary outcome measure was between group difference in patient anxiety at the time of separation using the Modified Yale Preoperative Anxiety Scale. Secondary outcomes included emergence delirium and mask acceptance at induction.

RESULTS

There was no significant difference in Modified Yale Preoperative Anxiety Scale scores at separation between midazolam (median/interquartile range = 26.7/23.3-36.6) and zolpidem (median/interquartile range = 30.0/23.3-56.6) groups, difference 0.01 (95% CI -3E^-5 , 3E^-2 ; P = 0.07). Mask acceptance score was significantly better in the midazolam group. There was no significant difference in emergence delirium scores between groups.

CONCLUSION

This study demonstrates that zolpidem, as dosed, was similar to midazolam with regard to anxiety scoring, and inferior with regard to mask acceptance scores.

Pediatric Cardiac Surgery and Pain Management: After 40 Years in the Desert, Have We Reached the Promised Land?

Pain prevention in the pediatric population is mandatory and an integrative aspect of medical practice. Optimal pain management is the right of all patients and the responsibility of all health professionals. The key to adequate pain management is assessing its presence and severity, identifying those who require intervention, and appreciating treatment efficacy. The population of pediatric patients undergoing cardiac surgery is unique in both clinical severity and hemodynamic response to painful stimuli, thus making pain management even more challenging. In this review, we will describe the different pain assessment tools as well as intra- and postoperative regimens of pain management.

Comparison of Oral Melatonin and Midazolam as Premedication in Children Undergoing General Anesthesia for Dental Treatment

Background

Dental anxiety is prevalent in children. This condition may cause uncooperative behavior and need a treatment under general anesthesia. The perioperative period, especially for children, is a stressing event. Premedication is commonly used to reduce perioperative anxiety and facilitate the induction of anesthesia.

Methods

132 children candidates for dental treatment under GA were enrolled in this study and randomly divided into 3 groups. Oral melatonin, midazolam, and normal saline were administered as premedication. Patient's sedation score before GA, the ease of intravenous line establishment, patient's need for painkillers, and duration of recovery were evaluated and compared.

Results

Regarding the sedation score and response to IV access establishment, comparisons showed statistically significant differences between melatonin and midazolam groups (P < 0.05) as well as between midazolam and placebo groups (P < 0.001). The difference between melatonin and placebo groups was not significant (P > 0.05). The need for painkiller administration was statistically different between midazolam and placebo, melatonin and placebo, and midazolam and melatonin groups (P < 0.05). A statistically significant difference was also found between melatonin and midazolam as well as between melatonin and placebo groups (P < 0.05) with regard to the recovery duration while no significant difference was observed between midazolam and placebo groups (P > 0.05).

Conclusion

Midazolam is superior to melatonin for premedication regarding the patients' sedation score before anesthesia and the ease of IV access establishment. Premedication with midazolam decreases the need for painkillers and increases the rate of recovery in children undergoing GA for dental treatment.

Comparison of oral dexmedetomidine and midazolam for premedication and emergence delirium in children after dental procedures under general anesthesia: a retrospective study

Background

Premedication is the most common way to minimize distress in children entering the operating room and to facilitate the smooth induction of anesthesia and is accomplished using various sedative drugs before the children are being transferred to the operating room. The aim of this study was to compare the effect of oral dexmedetomidine (DEX) and oral midazolam (MID) on preoperative cooperation and emergence delirium (ED) among children who underwent dental procedures at our hospital between 2016 and 2017.

Patients and methods

The medical records of 52 children, who were American Society of Anesthesiologists I, aged between 3 and 7 years, and who underwent full-mouth dental rehabilitation under general anesthesia (GA), were evaluated. Twenty-six patients were given 2 µg/kg of DEX, while another 26 patients were given 0.5 mg/kg of MID in apple juice as premedication agents. The patients’ scores on the Ramsay Sedation Scale (RSS), Parental Separation Anxiety Scale (PSAS), Mask Acceptance Scale, Pediatric Anesthesia Emergence Delirium Scale (PAEDS), and hemodynamic parameters were recorded from patients’ files. The level of sedation of children had been observed just before premedication and at 15, 30, and 45 min after premedication. The data were analyzed using a chi-square test, Fisher’s exact test, Student’s t-test, and analysis of variance in SPSS.

Results

The Mask Acceptance Scale and PSAS scores and RSS scores at 15, 30, and 45 min after premedication were not statistically different (p>0.05) in both groups, whereas the PAEDS scores were significantly lower in the DEX group (p<0.05).

Conclusion

Oral DEX provided satisfactory sedation levels, ease of parental separation, and mask acceptance in children in a manner similar to MID. Moreover, children premedicated with DEX experienced lesser ED than those premedicated with MID.

Dexmedetomidine-based monitored conscious sedation combined local anesthesia for levator resection in a 10-year-old child with Marcus Gunn jaw-winking synkinesis: A case report

RATIONALE

Levator resection has become a routine procedure for patients with severe Marcus Gunn jaw-winking synkinesis (MGJWS). To optimize the surgical outcome, adult patients need to be kept awake, or easily aroused and responsive to verbal commands during the operation. However, levator resection is commonly performed under general anesthesia in pediatric patients. In the present case, we described a successful anesthetic protocol of conscious sedation with local anesthesia for levator resection in a child.

PATIENT CONCERNS

A 10-year-old boy with MGJWS was admitted to our hospital and scheduled for levator resection. The patient was born through a normal delivery and had no previous history of allergy, no comorbidity, and no history of receiving anesthesia or operation. The laboratory tests of the patient were unremarkable.

DIAGNOSES

The diagnosis of MGJWS was made by two experienced ophthalmologists.

INTERVENTIONS

A 10-year-old boy with MGJWS was admitted to our hospital and scheduled for levator resection. The levator resection was performed under monitored conscious sedation with dexmedetomidine and local anesthesia.

OUTCOMES

Patient with spontaneous breathing responded normally to verbal commands throughout the operation, and no adverse events occurred. The patient and ophthalmologist reported high satisfaction with anesthesia management.

LESSONS

Dexmedetomidine-based monitored conscious sedation with local anesthesia is a feasible alternative to general anesthesia for levator resection in collaborative patients.

Median effective dose of intranasal dexmedetomidine sedation for transthoracic echocardiography in pediatric patients with noncyanotic congenital heart disease: An up-and-down sequential allocation trial

BACKGROUND

Intranasal dexmedetomidine can provide adequate sedation during short procedures. However, previous literature investigating the single-dose use of intranasal dexmedetomidine for sedation during transthoracic echocardiography in younger children is scarce, and the effects of age on sedation with intranasal dexmedetomidine remain controversial.

OBJECTIVE

This study was to determine the 50% effective dose and estimate the 95% effective dose of single-dose intranasal dexmedetomidine to induce sedation in pediatric patients with noncyanotic congenital heart disease, and also determine the effect of age on the dose required for sedation.

METHODS

Patients were stratified into three age groups of 1-6 months, 7-12 months, and 13-36 months. Intranasal dexmedetomidine started at a dose of 2 μg kg^-1 on the first patient. The dose of dexmedetomidine for each subsequent patient was determined by the previous patient's response using Dixon's up-and-down method with an interval of 0.25 μg kg^-1 . Sedation scale and recovery were assessed by the Modified Observer Assessment of Alertness and Sedation Scale and Modified Aldrete Recovery Score. The 50% effective dose was determined by Dixon's up-and-down method. In addition, both 50% effective dose and 95% effective dose were obtained using a probit regression approach. Other variables included sedation onset time, echocardiography time, wake-up time, discharge time, heart rate, blood pressure, oxygen saturation, respiratory rate, and adverse events such as vomiting, regurgitation, and apnea.

RESULTS

The study population was comprised of 70 patients. The 50% effective dose (95% confidence interval) and the 95% effective dose (95% confidence interval) of intranasal dexmedetomidine for sedation were 1.8 (1.58-2.00) μg kg^-1 and 2.2 (1.92-5.62) μg kg^-1 in patients aged 1-6 months, 1.8 (1.61-1.95) μg kg^-1 and 2.1 (1.90-2.85) μg kg^-1 in patients aged 7-12 months, 2.2 (1.92-2.37) μg kg^-1 and 2.7 (2.34-6.88) μg kg^-1 in patients aged 13-36 months, respectively. The 50% effective dose in age group 13-36 months was higher than those of age group 1-6 months (P = .042) and 7-12 months (P = .043). There were no differences in sedation onset time, echocardiography time, wake-up time, and discharge time between groups. None of the patients experienced oxyhemoglobin desaturation, hypotension, or bradycardia during the procedure. No significant adverse events occurred.

CONCLUSION

Single-dose of intranasal dexmedetomidine was an effective agent for patients under the age of 3 years requiring sedation for transthoracic echocardiography. The 50% effective dose of intranasal dexmedetomidine for transthoracic echocardiography sedation in children aged 13-36 months was higher than in children <13 months.

Interventions for postoperative pain in children: An overview of systematic reviews

The aim of this study was to conduct an overview of systematic reviews that summarizes the results about efficacy and safety from randomized controlled trials involving the various strategies used for postoperative pain management in children. We searched the Cochrane Database of Systematic Reviews, CINAHL, Database of Reviews of Effect, Embase, MEDLINE, and PsycINFO from the earliest date to January 24, 2016. This overview included 45 systematic reviews that evaluated interventions for postoperative pain in children. Out of 45 systematic reviews that investigated various interventions for postoperative pain in children, 19 systematic reviews (42%) presented conclusive evidence of efficacy. Positive conclusive evidence was reported in 18 systematic reviews (40%) for the efficacy of diclofenac, ketamine, caudal analgesia, dexmedetomidine, music therapy, corticosteroid, epidural analgesia, paracetamol, and/or nonsteroidal anti-inflammatory drugs and transversus abdominis plane block. Only one systematic review reported conclusive evidence of equal efficacy that involved a comparison of dexmedetomidine vs morphine and fentanyl. Safety of interventions was reported as conclusive in 14 systematic reviews (31%), with positive conclusive evidence for dexmedetomidine, corticosteroid, epidural analgesia, transversus abdominis plane block, and clonidine. Seven systematic reviews reported equal conclusive safety for epidural infusion, diclofenac intravenous vs ketamine added to opioid analgesia, bupivacaine, ketamine, paracetamol, and dexmedetomidine vs intravenous infusions of various opioid analgesics, oral suspension and suppository of diclofenac, only opioid, normal saline, no treatment, placebo, and midazolam. Negative conclusive statement for safety was reported in one systematic review for caudal analgesia vs noncaudal regional analgesia. More than half of systematic reviews included in this overview were rated as having medium methodological quality. Of 45 included systematic reviews, 10 were Cochrane reviews and they had higher methodological quality than non-Cochrane reviews. As evidence concerning efficacy and safety is inconclusive for most of the analyzed interventions, our review points out the need for more rigorous trials concerning pain management in children.

Effectiveness of preoperative intranasal dexmedetomidine, compared with oral midazolam, for the prevention of emergence delirium in the pediatric patient undergoing general anesthesia: a systematic review

BACKGROUND

Emergence delirium is defined as a cognitive disturbance during emergence from general anesthesia resulting in hallucinations, delusions and confusion manifested by agitation, restlessness, involuntary physical movement and extreme flailing in bed. Postoperative emergence delirium develops in 12% to 18% of all children undergoing general anesthesia for surgery. This post-anesthetic phenomenon changes cognitive and psychomotor behavior, and puts pediatric patients and health care personnel at risk of injury. A newer drug, dexmedetomidine, is a selective alpha-2 agonist, which works in the brain and spinal cord that has sedative, analgesic and anxiolytic properties. Dexmedetomidine also has the ability to lower the overall anesthetic requirements by reducing sympathetic outflow in response to painful surgical stimulation. In current literature, there is not a systematic review that compares the effectiveness of preoperative intranasal dexmedetomidine administration against oral midazolam for the prevention of emergence delirium.

OBJECTIVES

The objective of this review was to identify the effectiveness of preoperative intranasal dexmedetomidine compared to oral midazolam for the prevention of emergence delirium in the pediatric patient undergoing general anesthesia.

INCLUSION CRITERIA TYPES OF PARTICIPANTS

This review considered studies that included pediatric patients aged three to seven years, with an American Society of Anesthesiologists (ASA) classification of I or II, and undergoing general anesthesia for elective/ambulatory surgery. This review excluded studies that included patients who had special needs including: developmental delay, chronic pain issues, and/or any preexisting mental or physical health disorders which categorized them above an ASA II.

TYPES OF INTERVENTION(S)/PHENOMENA OF INTEREST

This review considered studies that compared preoperative intranasal administration of dexmedetomidine with preoperative oral administration of midazolam for the prevention of emergence delirium.

TYPES OF STUDIES

This review considered both experimental and non-experimental study designs including randomized-controlled trials (RCTs), non-randomized control trials, quasi-experimental, before and after studies, prospective and retrospective cohort studies, case control studies, and analytical cross-sectional studies for inclusion.

OUTCOMES

This review considered studies that included the presence of postoperative emergence delirium. Only studies that used the Pediatric Anesthesia Emergence Delirium Scale to quantify the degree of emergence delirium were included in the review. Adverse events other than emergence delirium were not considered as part of the outcomes inclusion criteria but were to be included in the discussion if any articles were identified.

SEARCH STRATEGY

The search strategy aimed to discover both published as well as unpublished studies. A three-step search strategy was utilized in eight databases. Studies published in English or with an English translation after 1999 were considered for inclusion in this review.

METHODOLOGICAL QUALITY

Assessment of methodological quality was not conducted as no studies were identified which met the inclusion criteria.

DATA EXTRACTION AND SYNTHESIS

Data extraction and synthesis was not performed since no studies were included in this systematic review.

RESULTS

Following the three-step search strategy as previously described, 117 articles were identified: six in Clinical Trials, one in ProQuest, 14 in Ovid MEDLINE, 10 in CINAHL, 16 in the Cochrane Library, 13 in Scopus, 36 in Embase, and 21 in Web of Science. There were 43 duplicates which were identified and removed in Refworks by the primary reviewer. The primary and secondary reviewers independently retrieved 10 potentially relevant studies (from the initial 74) through title and abstract screening as described in the inclusion criteria. All of the retrieved studies were excluded, after assessment of full text, with reasons based on the inclusion criteria.

CONCLUSIONS

There is no scientific evidence identifying the effectiveness of preoperative intranasal dexmedetomidine, compared with oral midazolam, for the prevention of emergence delirium in the pediatric patient population.

Effects of dexmedetomidine versus midazolam for premedication in paediatric anaesthesia with sevoflurane: A meta-analysis

Background Dexmedetomidine (DEX), an α₂-adrenergic receptor agonist, produces ideal sedation and early postoperative recovery for premedication in paediatric surgery, reducing preoperative anxiety and facilitating smooth induction of anaesthesia. We performed a meta-analysis to compare the effects of DEX and midazolam (MDZ) in paediatric anaesthesia with sevoflurane. Methods PubMed, Ovid, Web of Science, and Public Health Management Corporation were searched through December 2016 for randomized controlled trials (RCTs) that compared DEX and MDZ in children undergoing sevoflurane anaesthesia. The risk ratio (RR) with 95% incidence interval (95%CI) was used for dichotomous variables. Results Twelve RCTs involving 422 patients in the DEX group and 448 patients in the MDZ group were included. Patients in the DEX group had a significantly lower incidence of unsatisfactory sedation (RR [95%CI] = 0.71 [0.57-0.89]), unsatisfactory parental separation (RR [95%CI] = 0.56 [0.35-0.87]), and rescue analgesia (RR [95%CI] = 0.52 [0.35-0.77]) than patients in the MDZ group. However, both groups had a similar incidence of unsatisfactory mask acceptance, emergence agitation, and postoperative nausea and vomiting. Conclusion Compared with MDZ, DEX is beneficial in paediatric anaesthesia with sevoflurane because of its lower incidence of unsatisfactory sedation, parental separation, and rescue analgesia.

Prevention and Therapy of Pediatric Emergence Delirium: A National Survey

INTRODUCTION

Although pediatric emergence delirium (ED) is common, preventive and therapeutic pharmacological treatment is the matter of an international controversial discussion and evidence on different options is partially vague.

OBJECTIVE

We therefore examined clinical routine in prevention strategies and postoperative therapy of ED with respect to clinical experience in pediatric anesthesia.

METHODS

A web-based survey was developed investigating routine management (prevention and treatment) of ED, facility structure, and patient population. The link was sent to all enlisted members of the German Society of Anesthesiology.

RESULTS

We analyzed 1229 questionnaires. Overall, 88% reported ED as a relevant clinical problem; however, only 5% applied assessment scores to define ED. Oral midazolam was reported as standard premedication by 84% of respondents, the second largest group was 'no premedication' (5%). The first choice prevention strategy was to perform total intravenous (propofol) anesthesia (63%). The first choice therapeutic pharmacological treatment depended on clinical experience. Therapeutic propofol was preferentially chosen by more experienced anesthesiologists (5 to >20 patients per week, n = 538), while lesser experienced colleagues (<5 patients per week, n = 676) preferentially applied opioids. Dexmedetomidine (1%) and non-pharmacological (2%) therapy were rarely stated. The highest satisfaction levels for pharmacological therapy of ED were attributed to propofol.

CONCLUSIONS

Propofol is the preferred choice for pharmacological prevention and treatment of ED among German anesthesiologists. Further therapy options as well as alternatives to a midazolam-centered premedication procedure are underrepresented.