Opioid-sparing effects of perioperative paracetamol and nonsteroidal anti-inflammatory drugs (NSAIDs) in children

Standardization of Antibiotic Management and Reduction of Opioid Prescribing in Pediatric Complicated Appendicitis: A Quality Improvement Initiative

BACKGROUND

Appendicitis is one of the most common pediatric surgical procedures in the United States. However, wide variation remains in antibiotic prescribing and pain management across and within institutions. We aimed to minimize variation in antibiotic usage and decrease opioid prescribing at discharge for children with complicated appendicitis by implementation of a quality improvement (QI) initiative.

METHODS

On December 1st, 2021, a QI initiative standardizing postoperative care for complicated appendicitis was implemented across a tertiary pediatric healthcare system with two main surgical centers. QI initiative focused on antibiotic and pain management. An extensive literature search was performed and a total of 20 articles matching our patient population were critically appraised to determine the best evidence-based interventions to implement. Antibiotic regimen included: IV or PO ceftriaxone/metronidazole immediately post-operatively and transition to PO amoxicillin-clavulanic acid for completion of 7-day total course at discharge. Discharge pain control regimen included acetaminophen, ibuprofen, as needed gabapentin, and no opioid prescription. Guideline compliance were closely monitored for the first six months following implementation.

RESULTS

In the first 6-months post-implementation, compliance with use of ceftriaxone/metronidazole as initial post-operative antibiotics was 75.6 %. Transition to PO amoxicillin-clavulanic acid prior to discharge increased from 13.7 % pre-implementation to 73.7 % 6-months post-implementation (p < 0.001). Compliance with a 7-day course of antibiotics within the first 6-months post-implementation was 60 % across both sites. After QI intervention, overall opioid prescribing remained at 0 % at one surgical site and decreased from 17.6 % to 0 % at the second surgical site over the study timeframe (p < 0.001).

CONCLUSION

Antibiotic use can be standardized and opioid prescribing minimized in children with complicated appendicitis using QI principles. Continued monitoring of the complicated appendicitis guideline is needed to assess for further progress in the standardization of post-operative care.

STUDY TYPE

Quality improvement.

LEVEL OF EVIDENCE

Level III.

Severity and associated factors of postoperative pain in paediatric surgical patients aged 2 months-7 years at selected Addis Ababa Public Hospitals: a multicenter prospective longitudinal study

Background

Postoperative pain is a common and distressing consequence of surgery in children. It can lead to suffering, prolonged recovery, impaired physical functioning, and even chronic pain. Effective postoperative pain management is crucial for improving patient outcomes. However, several factors hinder the accurate assessment and management of pain in children, particularly in low-income countries. This study aims to evaluate the severity of postoperative pain in paediatric patients and identify its predictors.

Materials and methods

A longitudinal study was conducted on 235 paediatric surgical patients aged 2 months-7 years in Public Hospitals of Addis Ababa from January to April 2023. The primary outcome, pain severity, was assessed at three different times using a pain assessment tool. Cochran's q-test was used to compare postoperative pain incidences. The Generalized Estimating Equation was used to determine predictor variables' effects on pain severity over time. The study demonstrated the direction of association and significance using an AOR with a 95% CI at a P value of 0.05.

Result

The incidence of moderate to severe postoperative pain was 36.6% at 12 h, 20% at 24 h, and 10% at 36 h. Patients with preoperative pain and preoperative anxiety were more likely to experience moderate to severe postoperative pain [adjusted odds ratio (AOR)=3.41, CI=1.15, 10.00 and AOR=2.28, CI=1.219, 4.277, respectively). Intraoperative predictors of postoperative pain severity included longer duration of surgery (AOR=6.62, CI=1.90, 23.00) and major surgery (AOR=5.2, CI=2.11, 12.88). Postoperative pain severity was reduced in patients receiving multimodal analgesia (AOR=0.24; CI=0.091, 0.652) and in patients assessed frequently in the postoperative period (AOR=0.09; CI=0.022, 0.393).

Conclusion

A significant portion of paediatric surgical patients in this study experienced high levels of postoperative pain, particularly within the first 24 h. The most influential factors affecting pain severity were postoperative pain management strategies and assessment practices.

Fast Track Surgery as the Latest Multimodal Strategy of Enhanced Recovery after Urethroplasty

Fast track surgery (FTS), as well as ERAS (enhanced recovery after surgery/rapid recovery programs), is the latest multimodal treatment strategy, designed to reduce the disability period and improve the medical care quality. The study aims to analyze the enhanced recovery protocol effectiveness in a comparative study of elective urethral stricture surgery. A prospective study included 54 patients with an established diagnosis of urethral stricture in 2019-2020 in the urological hospital of the Irkutsk City Clinical Hospital No. 1. All 54 patients have completed the study. There were two groups of patients FTS-group (group II, n = 25) and standard group (group I, n = 29). In terms of preoperative parameters, the comparison groups have statistical homogeneity. The comparative intergroup efficacy analysis of the treatment based on the criteria established in the study demonstrated good treatment results for 5 (17.2%) patients of group I and 20 (80%) patients of group II (p=0.004). The overall efficacy of urethroplasty surgeries, regardless of the treatment protocol, was comparable (86.2% vs 92%; p=0.870), as well as the likelihood of relapse within two years (p=0.512). The predictors of recurrence were technical complications and urethral suture failure (OR 4.36; 95% CI 1.6; 7.11; p=0.002). The FTS protocol reduced the treatment period (p < 0.001) and decreased the severity of postoperative pain (p < 0.001). The use of the "fast track surgery" protocol in urethroplasty with generally similar treatment results makes it possible to achieve a better functional and objective condition of patients in the postoperative period due to less pain, shorter catheterization, and hospitalization.

Systemic opioids versus other analgesics and sedatives for postoperative pain in neonates

BACKGROUND

Neonates may undergo surgery because of malformations such as diaphragmatic hernia, gastroschisis, congenital heart disease, and hypertrophic pyloric stenosis, or complications of prematurity, such as necrotizing enterocolitis, spontaneous intestinal perforation, and retinopathy of prematurity that require surgical treatment. Options for treatment of postoperative pain include opioids, non-pharmacological interventions, and other drugs. Morphine, fentanyl, and remifentanil are the opioids most often used in neonates. However, negative impact of opioids on the structure and function of the developing brain has been reported. The assessment of the effects of opioids is of utmost importance, especially for neonates in substantial pain during the postoperative period.

OBJECTIVES

To evaluate the benefits and harms of systemic opioid analgesics in neonates who underwent surgery on all-cause mortality, pain, and significant neurodevelopmental disability compared to no intervention, placebo, non-pharmacological interventions, different types of opioids, or other drugs.

SEARCH METHODS

We searched Cochrane CENTRAL, MEDLINE via PubMed and CINAHL in May 2021. We searched the WHO ICTRP, clinicaltrials.gov, and ICTRP trial registries. We searched conference proceedings, and the reference lists of retrieved articles for RCTs and quasi-RCTs.  SELECTION CRITERIA: We included randomized controlled trials (RCTs) conducted in preterm and term infants of a postmenstrual age up to 46 weeks and 0 days with postoperative pain where systemic opioids were compared to 1) placebo or no intervention; 2) non-pharmacological interventions; 3) different types of opioids; or 4) other drugs.  DATA COLLECTION AND ANALYSIS: We used standard Cochrane methods. Our primary outcomes were pain assessed with validated methods, all-cause mortality during initial hospitalization, major neurodevelopmental disability, and cognitive and educational outcomes in children more than five years old. We used the fixed-effect model with risk ratio (RR) and risk difference (RD) for dichotomous data and mean difference (MD) for continuous data. We used GRADE to assess the certainty of evidence for each outcome.

MAIN RESULTS

We included four RCTs enrolling 331 infants in four countries across different continents. Most studies considered patients undergoing large or medium surgical procedures (including major thoracic or abdominal surgery), who potentially required pain control through opioid administration after surgery. The randomized trials did not consider patients undergoing minor surgery (including inguinal hernia repair) and those individuals exposed to opioids before the beginning of the trial. Two RCTs compared opioids with placebo; one fentanyl with tramadol; and one morphine with paracetamol. No meta-analyses could be performed because the included RCTs reported no more than three outcomes within the prespecified comparisons. Certainty of the evidence was very low for all outcomes due to imprecision of the estimates (downgrade by two levels) and study limitations (downgrade by one level).  Comparison 1: opioids versus no treatment or placebo Two trials were included in this comparison, comparing either tramadol or tapentadol with placebo. No data were reported on the following critical outcomes: pain; major neurodevelopmental disability; or cognitive and educational outcomes in children more than five years old. The evidence is very uncertain about the effect of tramadol compared with placebo on all-cause mortality during initial hospitalization (RR 0.32, 95% Confidence Interval (CI) 0.01 to 7.70; RD -0.03, 95% CI -0.10 to 0.05, 71 participants, 1 study; I² = not applicable). No data were reported on: retinopathy of prematurity; or intraventricular hemorrhage.  Comparison 2: opioids versus non-pharmacological interventions No trials were included in this comparison. Comparison 3: head-to-head comparisons of different opioids One trial comparing fentanyl with tramadol was included in this comparison. No data were reported on the following critical outcomes: pain; major neurodevelopmental disability; or cognitive and educational outcomes in children more than five years old. The evidence is very uncertain about the effect of fentanyl compared with tramadol on all-cause mortality during initial hospitalization (RR 0.99, 95% CI 0.59 to 1.64; RD 0.00, 95% CI -0.13 to 0.13, 171 participants, 1 study; I² = not applicable). No data were reported on: retinopathy of prematurity; or intraventricular hemorrhage.  Comparison 4: opioids versus other analgesics and sedatives One trial comparing morphine with paracetamol was included in this comparison. The evidence is very uncertain about the effect of morphine compared with paracetamol on COMFORT pain scores (MD 0.10, 95% CI -0.85 to 1.05; 71 participants, 1 study; I² = not applicable).  No data were reported on the other critical outcomes, i.e. major neurodevelopmental disability; cognitive and educational outcomes in children more than five years old, all-cause mortality during initial hospitalization; retinopathy of prematurity; or intraventricular hemorrhage.

AUTHORS' CONCLUSIONS

Limited evidence is available on opioid administration for postoperative pain in newborn infants compared to either placebo, other opioids, or paracetamol. We are uncertain whether tramadol reduces mortality compared to placebo; none of the studies reported pain scores, major neurodevelopmental disability, cognitive and educational outcomes in children older than five years old, retinopathy of prematurity, or intraventricular hemorrhage. We are uncertain whether fentanyl reduces mortality compared to tramadol; none of the studies reported pain scores, major neurodevelopmental disability, cognitive and educational outcomes in children older than five years old, retinopathy of prematurity, or intraventricular hemorrhage. We are uncertain whether morphine reduces pain compared to paracetamol; none of the studies reported major neurodevelopmental disability, cognitive and educational outcomes in children more than five years old, all-cause mortality during initial hospitalization, retinopathy of prematurity, or intraventricular hemorrhage. We identified no studies comparing opioids versus non-pharmacological interventions.

The Three W's of Acetaminophen In Children: Who, Why, and Which Administration Mode

Acetaminophen is one of the oldest medications commonly administered in children. Its efficacy in treating fever and pain is well accepted among clinicians. However, the available evidence supporting the use of acetaminophen's different modes of administration remains relatively scarce and poorly known. This short report summarizes the available evidence and provides a framework to guide clinicians regarding a rational use of acetaminophen in children.

Analgesic use and favourable patient-reported outcome measures after paediatric surgery: an analysis of registry data

BACKGROUND

Pain after paediatric appendectomy and tonsillectomy is often undertreated. Benchmarking of hospitals could reveal which measures are associated with improved patient- or parent-reported pain-related outcomes.

METHODS

A total of 898 anonymised cases from 11 European hospitals participating in PAIN OUT infant were analysed. The children completed a questionnaire on patient-reported outcomes (PROs) 24 h after surgery. According to a composite PRO measure, including pain intensity and pain-related interference, hospitals were allocated to Group I (favourable results), II (average results), and III (unfavourable results). Benchmarking of hospital groups was performed investigating process variables (dosing of non-opioid analgesics, opioids, and dexamethasone) associated with PROs, side-effects, and children's perception of care. Variables associated with PROs were analysed using multinomial regression analysis with the PRO score-related hospital group as a dependent variable (estimated odds ratios [OR], 95% confidence interval [CI]).

RESULTS

During the first 24 h after surgery, 1.2 (1.1-1.3) full daily doses of non-opioid analgesics (non-steroidal anti-inflammatory drug [NSAID], paracetamol, metamizole) were administered in group I and 0.7 (0.6-0.8) in group III (P<0.001). Intraoperative dexamethasone was administered to 70.1 and 52.6% of the children in Group I and Group III, respectively (P<0.001). A lower number of full daily doses of non-opioid analgesics: 0.22 [0.15-0.31]), less dexamethasone (0.49 [0.33-0.71]), fewer non-opioid analgesics before the end of surgery (0.37 [0.22-0.62]) and higher opioid doses were associated with hospital allocation to group III vs group I (Nagelkerke's R²=0.433).

CONCLUSIONS

The results indicated substantial deficits in the concept, application, and dosing of analgesics in paediatric patients after surgery. Timely administration of adequate analgesic doses can easily be introduced into daily clinical practice.

CLINICAL TRIAL REGISTRATION

clinicaltrials.gov NCT02083835.

Effect of Standing Intravenous Acetaminophen on Postoperative Opioid Exposure in a Pediatric Cardiac Intensive Care Unit

This study assessed the association between standing intravenous acetaminophen and opioid exposure after cardiac surgery. Before vs after implementation of a standardized pain pathway, we report decreased opioid exposure, 0.38 milligram per kilogram of morphine equivalents [IQR 0.10-0.81] vs 0.26 milligram per kilogram of morphine equivalents [0.09-0.56] (P = .01) and increased acetaminophen exposure, 3 [2-4] vs 4 [4-5] doses (P < .001).

Multimodal Pain Management in Orthopedic Surgery

Background: Orthopedic surgery typically results in moderate to severe pain in a majority of patients. Opioids were traditionally the primary medication to target mechanisms of pain transmission. Multimodal analgesia has become a preferred method of pain management in orthopedic practice. Utilizing more than one mode to address post-surgical pain by recruiting multiple receptors through different medications accelerates the recovery process and decreases the need for opioids. By implementing effective analgesic techniques and interventions, this practice, in turn, decreases the usage of perioperative opioids, and in the long term, prevents addiction to pain medications and risk of opioid overdose. In orthopedic surgeries, previous studies have found that multimodal analgesia has reduced early opioid usage in the postoperative course. Pain is the result of direct injury to the nervous system, with a wide variety of chemicals directly stimulating or sensitizing the peripheral nociceptors. The pathophysiology behind the mechanism of post-surgical pain, along with the importance of preoperative, perioperative, and postoperative pain regimens are emphasized. A brief overview of pain medications and their properties is provided. These medications are further categorized, with information on special considerations and typical dosage requirements. Pain management should address both neuropathic and subjective types of pain. Effective pain control requires constant reassessment with individualized strategies. Conclusion: By focusing on multimodal analgesia, anesthesiologists can now utilize newer techniques for postoperative pain relief from orthopedic surgery, with better short-term and long-term outcomes for the patient.

Comparison of intravenous ibuprofen versus ketorolac for postoperative analgesia in children undergoing lower abdominal surgery: A randomized, controlled, non-inferiority study

BACKGROUND

Non-steroidal anti-inflammatory drugs are often used as part of multimodal analgesia to control postoperative pain. This randomized, controlled, double-blinded, non-inferiority study aimed to compare the postoperative analgesic effects of intravenous ibuprofen versus ketorolac in children undergoing open unilateral lower abdominal surgery. The authors hypothesized that postoperative analgesia produced by intravenous ibuprofen would be non-inferior to that of intravenous ketorolac.

METHODS

Sixty-six children aged 2 to 8 years who were scheduled to undergo unilateral lower abdominal surgery, were recruited. Patients in the ibuprofen group received 10mg/kg/6h intravenous ibuprofen. Patients in the ketorolac group were given 0.5mg/kg/6h intravenous ketorolac. The primary outcome measure was 24-h postoperative morphine consumption. The secondary outcome measures were postoperative pain score, the incidence of early postoperative fever and the incidence of ibuprofen and ketorolac adverse effects including pain during drug infusion, vomiting, epigastric pain and allergic reaction.

RESULTS

Fifty-nine patients completed the study (30 ibuprofen, 29 ketorolac). There was no significant difference (P=0.305) in the mean (SD) 24-h postoperative morphine consumption (μ/kg) between intravenous ibuprofen, 16.00 (5.31), and ketorolac, 14.65 (4.61). The reported pain scores were similar in both groups. The incidence of postoperative fever was significantly lower (p=0.039) in the ibuprofen group (3%) than the ketorolac group (20%). The incidence of adverse effects was similar in both ibuprofen and ketorolac groups.

CONCLUSIONS

Intravenous ibuprofen can be used as an alternative to ketorolac for postoperative analgesia in children undergoing unilateral lower abdominal surgery because both drugs similarly provide safe and effective postoperative analgesia.

Evolving approaches in neonatal postoperative pain management

Neonates experience significant moderate and severe postoperative pain. Effective postoperative pain management in neonates is required to minimize acute and long-term effects of neonatal pain. Protecting the developing nervous system from persistent sensitization of pain pathways and developing primary hyperalgesia is essential. Opioids and acetaminophen are commonly analgesics used for pain control. Regional anesthesia provides adequate intraoperative and postoperative analgesia in neonates. It decreases exposure to opioids, reduces adverse drug effects, and facilitates early extubation. It suppresses the stress response and can prevent long-term behavioral responses to pain. The most common blocks performed in neonates are neuraxial blocks. Using ultrasound increased the number of peripheral nerve blocks performed in neonates. Recently, various peripheral nerve blocks (paravertebral, transverse abdominis plane, rectus sheath, quadratus lumborum, erector spinae plane blocks) were safely used. Many studies support analgesic efficacy but highlight neonates' unpredictability and variability of fascial blocks.

Anesthesia and cancer recurrence: an overview

Several perioperative factors are responsible for the dysregulation or suppression of the immune system with a possible impact on cancer cell growth and the development of new metastasis. These factors have the potential to directly suppress the immune system and activate hypothalamic-pituitary-adrenal axis and the sympathetic nervous system with a consequent further immunosuppressive effect.Anesthetics and analgesics used during the perioperative period may modulate the innate and adaptive immune system, inflammatory system, and angiogenesis, with a possible impact on cancer recurrence and long-term outcome. Even if the current data are controversial and contrasting, it is crucial to increase awareness about this topic among healthcare professionals for a future better and conscious choice of anesthetic techniques.In this article, we aimed to provide an overview regarding the relationship between anesthesia and cancer recurrence. We reviewed the effects of surgery, perioperative factors, and anesthetic agents on tumor cell survival and tumor recurrence.

Opioid reduction and elimination in pediatric surgical patients

INTRODUCTION

Opioid overuse is a national concern. Mitigation strategies include judicious prescribing and encouragement of non-opioid therapies. This quality improvement project aimed to identify physician opioid prescribing and patient usage patterns at a pediatric academic center.

METHODS

Patients who underwent same-day general, orthopedic, or plastic surgery procedures were contacted 7 - 28 days post-operatively. Inquiries were made about opioid usage, non-opioid strategies, and overall pain management satisfaction. A subset of general surgery patients not prescribed opioids was compared to those prescribed opioids.

RESULTS

Between August 2017 - May 2020, 558 surveys were obtained. There was a significant increase in the use of non-opioid therapies between 2017 and 2020 (83.5% vs 97%, p=0.04). Almost all patients' opioid prescriptions were filled; however, 78-98% had leftover opioids. Only 20-25% disposed the excess opioids. In subset analysis of general surgery patients, no inguinal hernia or orchiopexy patient who was discharged without opioids required opioids later. More non-opioid patients used other therapies (acetaminophen, heat (p=0.03)); however, pain management satisfaction was higher in the opioid group (99% vs 94%, p=0.01).

CONCLUSION

While our opioid prescribing has decreased, physicians are still prescribing more opioids than patients require. Further education on non-opioid pain therapies and proper disposal of opioids are needed.

LEVEL OF EVIDENCE

III TYPE OF STUDY: prospective quality improvement study.

Opioid-Sparing Perioperative Analgesia Within Enhanced Recovery Programs

Opioid-based analgesia in the perioperative period can provide excellent pain control, but this approach exposes the patient to avoidable side effects and possible harm. Optimal analgesia, an approach that targets the fastest functional recovery with adequate pain control while minimizing side effects, can be achieved with opioid minimization. Many different options for nonopioid multimodal analgesia exist and have been shown to be efficacious, with certain modalities being more beneficial for specific surgeries. This review will present the evidence and practical tips for these management strategies.

Visualizing Opioid-Use Variation in a Pediatric Perioperative Dashboard

BACKGROUND

Anesthesiologists integrate numerous variables to determine an opioid dose that manages patient nociception and pain while minimizing adverse effects. Clinical dashboards that enable physicians to compare themselves to their peers can reduce unnecessary variation in patient care and improve outcomes. However, due to the complexity of anesthetic dosing decisions, comparative visualizations of opioid-use patterns are complicated by case-mix differences between providers.

OBJECTIVES

This single-institution case study describes the development of a pediatric anesthesia dashboard and demonstrates how advanced computational techniques can facilitate nuanced normalization techniques, enabling meaningful comparisons of complex clinical data.

METHODS

We engaged perioperative-care stakeholders at a tertiary care pediatric hospital to determine patient and surgical variables relevant to anesthesia decision-making and to identify end-user requirements for an opioid-use visualization tool. Case data were extracted, aggregated, and standardized. We performed multivariable machine learning to identify and understand key variables. We integrated interview findings and computational algorithms into an interactive dashboard with normalized comparisons, followed by an iterative process of improvement and implementation.

RESULTS

The dashboard design process identified two mechanisms-interactive data filtration and machine-learning-based normalization-that enable rigorous monitoring of opioid utilization with meaningful case-mix adjustment. When deployed with real data encompassing 24,332 surgical cases, our dashboard identified both high and low opioid-use outliers with associated clinical outcomes data.

CONCLUSION

A tool that gives anesthesiologists timely data on their practice patterns while adjusting for case-mix differences empowers physicians to track changes and variation in opioid administration over time. Such a tool can successfully trigger conversation amongst stakeholders in support of continuous improvement efforts. Clinical analytics dashboards can enable physicians to better understand their practice and provide motivation to change behavior, ultimately addressing unnecessary variation in high impact medication use and minimizing adverse effects.

2022 Society of Critical Care Medicine Clinical Practice Guidelines on Prevention and Management of Pain, Agitation, Neuromuscular Blockade, and Delirium in Critically Ill Pediatric Patients With Consideration of the ICU Environment and Early Mobility

RATIONALE

A guideline that both evaluates current practice and provides recommendations to address sedation, pain, and delirium management with regard for neuromuscular blockade and withdrawal is not currently available.

OBJECTIVE

To develop comprehensive clinical practice guidelines for critically ill infants and children, with specific attention to seven domains of care including pain, sedation/agitation, iatrogenic withdrawal, neuromuscular blockade, delirium, PICU environment, and early mobility.

DESIGN

The Society of Critical Care Medicine Pediatric Pain, Agitation, Neuromuscular Blockade, and Delirium in critically ill pediatric patients with consideration of the PICU Environment and Early Mobility Guideline Taskforce was comprised of 29 national experts who collaborated from 2009 to 2021 via teleconference and/or e-mail at least monthly for planning, literature review, and guideline development, revision, and approval. The full taskforce gathered annually in-person during the Society of Critical Care Medicine Congress for progress reports and further strategizing with the final face-to-face meeting occurring in February 2020. Throughout this process, the Society of Critical Care Medicine standard operating procedures Manual for Guidelines development was adhered to.

METHODS

Taskforce content experts separated into subgroups addressing pain/analgesia, sedation, tolerance/iatrogenic withdrawal, neuromuscular blockade, delirium, PICU environment (family presence and sleep hygiene), and early mobility. Subgroups created descriptive and actionable Population, Intervention, Comparison, and Outcome questions. An experienced medical information specialist developed search strategies to identify relevant literature between January 1990 and January 2020. Subgroups reviewed literature, determined quality of evidence, and formulated recommendations classified as "strong" with "we recommend" or "conditional" with "we suggest." Good practice statements were used when indirect evidence supported benefit with no or minimal risk. Evidence gaps were noted. Initial recommendations were reviewed by each subgroup and revised as deemed necessary prior to being disseminated for voting by the full taskforce. Individuals who had an overt or potential conflict of interest abstained from relevant votes. Expert opinion alone was not used in substitution for a lack of evidence.

RESULTS

The Pediatric Pain, Agitation, Neuromuscular Blockade, and Delirium in critically ill pediatric patients with consideration of the PICU Environment and Early Mobility taskforce issued 44 recommendations (14 strong and 30 conditional) and five good practice statements.

CONCLUSIONS

The current guidelines represent a comprehensive list of practical clinical recommendations for the assessment, prevention, and management of key aspects for the comprehensive critical care of infants and children. Main areas of focus included 1) need for the routine monitoring of pain, agitation, withdrawal, and delirium using validated tools, 2) enhanced use of protocolized sedation and analgesia, and 3) recognition of the importance of nonpharmacologic interventions for enhancing patient comfort and comprehensive care provision.

Efficacy and Safety of NSAIDs in Infants: A Comprehensive Review of the Literature of the Past 20 Years

Non-steroidal anti-inflammatory drugs (NSAIDs) are commonly used in infants, children, and adolescents worldwide; however, despite sufficient evidence of the beneficial effects of NSAIDs in children and adolescents, there is a lack of comprehensive data in infants. The present review summarizes the current knowledge on the safety and efficacy of various NSAIDs used in infants for which data are available, and includes ibuprofen, dexibuprofen, ketoprofen, flurbiprofen, naproxen, diclofenac, ketorolac, indomethacin, niflumic acid, meloxicam, celecoxib, parecoxib, rofecoxib, acetylsalicylic acid, and nimesulide. The efficacy of NSAIDs has been documented for a variety of conditions, such as fever and pain. NSAIDs are also the main pillars of anti-inflammatory treatment, such as in pediatric inflammatory rheumatic diseases. Limited data are available on the safety of most NSAIDs in infants. Adverse drug reactions may be renal, gastrointestinal, hematological, or immunologic. Since NSAIDs are among the most frequently used drugs in the pediatric population, safety and efficacy studies can be performed as part of normal clinical routine, even in young infants. Available data sources, such as (electronic) medical records, should be used for safety and efficacy analyses. On a larger scale, existing data sources, e.g. adverse drug reaction programs/networks, spontaneous national reporting systems, and electronic medical records should be assessed with child-specific methods in order to detect safety signals pertinent to certain pediatric age groups or disease entities. To improve the safety of NSAIDs in infants, treatment needs to be initiated with the lowest age-appropriate or weight-based dose. Duration of treatment and amount of drug used should be regularly evaluated and maximum dose limits and other recommendations by the manufacturer or expert committees should be followed. Treatment for non-chronic conditions such as fever and acute (postoperative) pain should be kept as short as possible. Patients with chronic conditions should be regularly monitored for possible adverse effects of NSAIDs.

Postoperative Pain Management in Enhanced Recovery Pathways

Postoperative pain is a common but often inadequately treated condition. Enhanced recovery pathways (ERPs) are increasingly being utilized to standardize perioperative care and improve outcomes. ERPs employ multimodal postoperative pain management strategies that minimize opioid use and promote recovery. While traditional opioid medications continue to play an important role in the treatment of postoperative pain, ERPs also rely on a wide range of non-opioid pharmacologic therapies as well as regional anesthesia techniques to manage pain in the postoperative setting. The evidence for the use of these interventions continues to evolve rapidly given the increasing focus on enhanced postoperative recovery. This article reviews the current evidence and knowledge gaps pertaining to commonly utilized modalities for postoperative pain management in ERPs.

The pain in the Emergency Department: Choosing and treating wisely before and during the COVID-19 era

Pain is a frequent reason for referral to the Emergency Department (ED). Adequate management of pain is a moral and ethical imperative. If not correctly treated, acute pain can cause physical and psychological complications, and become chronic with severe consequences such as anxiety, depression, and social isolation. As consequence, emergency clinicians should treat pain as soon as possible, avoiding delays even in case of acute abdominal pain. Pain management is particularly complex in the elderly and emergency clinicians should always consider AGS Beers criteria ® to avoid inappropriate medications, severe side-effects, and drug-drug interactions. Pain is also a common cause of delirium in older patients. The SARS CoV-2 infection not only can cause acute pain, but also exacerbate chronic pain, particularly in the elderly, who are at high risk to be infected. Looking at all this evidence, emergency clinicians should treat pain with different strategies according to their experience and cultural background, making the right choice for each patient. This work is a critical review of the pain management in the ED, with a particular attention on the effects of COVID-19 in the EDs. We conducted a systematic search of the following databases: PubMed, Google Scholar, Science Direct, Medline from 2000 to 2020, using the keywords of “pain”, “emergency”, “COVID19”, “elderly”, “palliative care”, “ketamine”, “dexmedetomidine”, and “post-traumatic stress disorder”. The aim of this review is to help emergency clinicians to correctly manage pain in the ED with a new point of view regarding the pain management in COVID-19 patients.

Administration of Intravenous Dexmedetomidine and Acetaminophen for Improved Postoperative Pain Management in Primary Palatoplasty

OBJECTIVE

Suboptimal pain management after primary palatoplasty (PP) may lead to complications such as hypoxemia, and increased hospital length of stay. Opioids are the first option for postoperative acute pain control after PP; however, adverse effects include excessive sedation, respiratory depression, and death, among others. Thus, optimizing postoperative pain control using opioid-sparing techniques is critically important. This paper aims to analyze efficacy and safety of combined intravenous (IV), dexmedetomidine, and IV acetaminophen during PP.

METHODS

Review of a cohort of patients who underwent PP from April 2009 to July 2018 at a large free-standing children's hospital was performed, comparing patients who received combined IV dexmedetomidine and acetaminophen with those who did not receive either of the 2 medications. Efficacy was measured through opioid and nonopioid analgesic dose and timing, pain scores, duration to oral intake, and length of stay. Safety was measured by 30-day complication rates including readmission for bleeding and need for supplementary oxygen.

RESULTS

Total postoperative acetaminophen (P = 0.01) and recovery room fentanyl (P < 0.001) requirements were significantly lower in the study group compared with the control group. Length of stay, oral intake duration, pain scores, total postoperative opioid requirements, and complications rates trended favorably in the study group, though differences did not reach statistical significance.

CONCLUSIONS

Intraoperative IV dexmedetomidine and acetaminophen during PP provides safe and effective perioperative pain control, resulting in statistically significant decreased need for postoperative acetaminophen and fentanyl. Larger studies are necessary to determine if other trends identified in this study may be significant.

A government mandated consent safely reduces opioid utilization for major pediatric genitourinary surgeries

INTRODUCTION

We describe the effect of a state mandated opioid consent on opioid utilization and multimodal pain use for major pediatric genitourinary surgeries.

METHODS

All patients who underwent an inpatient pediatric genitourinary surgery at the Children's Hospital of Pittsburgh between August 2015 and February 2020 were identified. Inpatient and outpatient multimodal pain control utilization were assessed. Delayed prescriptions or emergency department visits within 30 days were identified and when applicable referenced against National Surgical Quality Improvement Program data.

RESULTS

After accounting for a 6-month transition period following policy implementation, 462 major pediatric genitourinary procedures were identified. The frequency of discharge opiate prescriptions decreased from 68.4% prior to the transition period to 10.7% afterward(p<0.001). Morphine milligram equivalents per prescription decreased from 75(IQR 45-150) to 45(IQR 22.5-75)(p<0.001). The rate of delayed non-opioid analgesic prescriptions (6.6% vs 7.4%), delayed opioid prescriptions (1.5% vs 0.3%), or emergency department visits (11.8% vs 12.6%)(p = 0.809) remained unchanged. Data agreed with National Surgical Quality Improvement Program data in 98.5% of cases. After excluding one surgeon who departed after the transition period, regional block utilization did not change from 61/115(53%) to 147/320(45.9%)(p = 0.425).

CONCLUSIONS

A state mandated opioid consent safely reduced opioid utilization for most major pediatric genitourinary surgeries.

LEVEL OF EVIDENCE

Level III.

Newly approved IV acetaminophen in Canada: Switching from oral to IV acetaminophen. Is IV worth the price difference? A systematic review

Context

The use of intravenous acetaminophen leads to meaningful health cost increases for paediatric institutions. Therefore, strict criteria for intravenous acetaminophen administration are needed.

Objective

To undertake a systematic review of available evidence comparing oral versus intravenous acetaminophen use in children.

Method

A systematic literature search was conducted on five databases. All prospective interventional studies comparing intravenous to oral acetaminophen in patients <18 years old were included. Data collection and analysis were done according to PRISMA guidelines.

Results

Among 6,417 retrieved abstracts, 29 full-text articles were assessed of which 3 were retained. (1) Pharmacokinetic: Oral bioavailability (72% with a high inter-individual variability) was reported in 47 stable patients in a paediatric intensive care unit. (2) Analgesia: In a double-blind randomized controlled trial of 45 children, no difference in analgesia was found between oral and intravenous administration after cleft palate repair. (3) Fever: In an open-label prospective observational study of 200 children, temperature decreased faster after intravenous than oral administration but was similar 4 hours later.

Conclusions

Available data are insufficient to guide clinicians with a rational choice of route of administration. Oral bioavailability should be studied in paediatric populations outside the intensive care unit. Despite the widespread use of intravenous acetaminophen, there is little evidence to suggest that it improves analgesia compared to the oral formulation. Similarly, fever weans faster but whether this translates into any meaningful clinical outcome is unknown. The lack of data plus the significantly higher costs of intravenous acetaminophen should motivate further research.

Comparison of Monotherapy Versus Combination of Intravenous Ibuprofen and Propacetamol (Acetaminophen) for Reduction of Postoperative Opioid Administration in Children Undergoing Laparoscopic Hernia Repair: A Double-Blind Randomized Controlled Trial

BACKGROUND

Extensive efforts have been made toward reducing postoperative opioid use in children. In this study, we assessed whether propacetamol, or a nonsteroidal anti-inflammatory drug (NSAID), or their combination could effectively reduce opioid use in children after laparoscopic inguinal hernia repair.

METHODS

This randomized, double-blind clinical trial included 159 children aged 6 months to 6 years. Children were allocated into 1 of the following 3 groups: group I was treated with 10 mg·kg-1 ibuprofen, group P was treated with 30 mg·kg-1 propacetamol, and group I + P was treated with both drugs in their respective concentrations. If the face-legs-activity-crying-consolability (FLACC) score was ≥4 during the postanesthesia care unit stay, 1.0 µg·kg-1 fentanyl was administered as a rescue analgesic. The number of patients who received rescue fentanyl in the postanesthesia care unit was defined as the primary outcome; this was analyzed using the χ2 test. The secondary outcomes included the FLACC and the parents' postoperative pain measure (PPPM) scores until the 24-hour postoperative period.

RESULTS

Among the 144 enrolled patients, 28.6% in group I, 66.7% in group P, and 12.8% in group I + P received rescue fentanyl in the postanesthesia care unit (P < .001). The highest FLACC score was lower in group I + P than in either group I or P (P = .007 and P < .001, respectively). Group I + P presented significantly lower PPPM scores than group P at 4 and 12 hours postoperative (P = .03 and .01, respectively).

CONCLUSIONS

The use of ibuprofen plus propacetamol immediately following laparoscopic hernia repair surgery in children resulted in the reduced use of an opioid drug compared with the use of propacetamol alone.

Pain Management in Children: NSAID Use in the Perioperative and Emergency Department Settings

Nonsteroidal anti-inflammatory drugs (NSAIDs) are often used for pediatric pain management in the emergency setting and postoperatively. This narrative literature review evaluates pain relief, opioid requirements, and adverse effects associated with NSAID use. A PubMed search was conducted to identify randomized controlled trials evaluating the use of conventional systemic NSAIDs as pain management for children in the perioperative or emergency department (traumatic injury) setting. Trials of cyclooxygenase-2 inhibitors ("coxibs") were excluded. Search results included studies of ibuprofen (n = 12), ketoprofen (n = 5), ketorolac (n = 6), and diclofenac (n = 4). NSAIDs reduced the opioid requirement in 10 of 13 studies in which this outcome was measured. NSAID use did not compromise pain relief; NSAIDs provided improved or similar pain scores compared with opioids (or other control) in 24 of 27 studies. Adverse event frequencies were reported in 26 studies; adverse event frequencies with NSAIDs were lower than with opioids (or other control) in three of 26 studies, similar in 21 of 26 studies, and more frequent in two of 26 studies. Perioperative and emergency department use of NSAIDs may reduce opioid requirements while maintaining pain control, with similar or reduced frequencies of opioid-associated adverse events.

Pre-emptive multimodal analgesic bundle with transversus abdominis plane block enhances early recovery after laparoscopic cholecystectomy

BACKGROUND

As postoperative pain after laparoscopic cholecystectomy may delay recovery and discharge, a multimodal and pre-emptive analgesic approach is necessary. This study demonstrated that a multimodal analgesic bundle improves postoperative recovery, using the Quality of Recovery-40K (QoR-40K) questionnaire during the first 24 h after laparoscopic cholecystectomy.

METHODS

In this prospective non-randomized study with two parallel groups, 80 patients undergoing laparoscopic cholecystectomy were allocated into either the multimodal analgesia group or the conventional analgesia group. The multimodal analgesia group received a pre-emptive analgesic bundle (preoperative intravenous administration of paracetamol, ketorolac, and dexamethasone, and a posterior approach to the transversus abdominis plane block), while the conventional analgesia group did not. The primary outcome was the QoR-40K score during the first 24 h after surgery. Secondary outcomes were the peak visual analog scale pain score at rest and the incidence rates of rescue analgesic use and nausea/vomiting during the first 24 h after surgery.

RESULTS

The QoR-40K score was higher in the multimodal analgesia group than in the conventional analgesia group (196 [190-199] vs. 182 [172-187], p < 0.001). The peak visual analog scale pain score was significantly lower in the multimodal analgesia group than in the conventional analgesia group. Multimodal analgesia also reduced the incidence rates of rescue analgesic use and postoperative nausea/vomiting (22.5% [95% CI, 9.6-35.4%] vs. 55.0% [39.6-70.4%], p = 0.003), compared to conventional analgesia.

CONCLUSIONS

Multimodal analgesia significantly improves the quality of early postoperative recovery after laparoscopic cholecystectomy, as shown by the QoR-40K score.

Study of Peri-Articular Anaesthetic for Replacement of the Knee (SPAARK): statistical analysis plan for a randomised controlled trial assessing the effectiveness of peri-articular liposomal bupivacaine plus bupivacaine hydrochloride compared with bupivacaine hydrochloride alone

Background

Up to three quarters of surgical patients receive inadequate pain relief, with 40% of patients reporting severe pain following knee replacement, which may indicate the current pain relief strategies using opiate-based analgesia cannot achieve patient satisfaction. Liposomal bupivacaine is liposome-encapsulated bupivacaine which has been reported to be effective for up to 72 h. The study of Peri-Articular Anaesthetic for Replacement of the Knee (SPAARK) trial has been designed to assess the effectiveness of peri-articular liposomal bupivacaine and bupivacaine hydrochloride compared with peri-articular bupivacaine hydrochloride alone in the management of post-operative pain following knee replacement.

Methods/design

The SPAARK trial is a multi-centre, patient-blinded, randomised controlled trial. The co-primary outcomes are post-operative recovery assessed by global QoR-40 scores at 72 h and cumulative pain VAS score from 6 to 72 h following surgery. Longer-term measures of the co-primary outcomes are collected at 6 weeks and 6 and 12 months post randomisation, together with secondary outcomes, i.e. the Oxford Knee Score, and the American Knee Society Score. Cumulative opiate use and fitness for discharge are measured up to 72 h post-surgery. The analysis approaches for the primary and secondary outcomes are described here, as are the descriptive statistics which will be reported. The full SPAARK protocol has already been published.

Results

The co-primary outcomes will be analysed using multivariate linear regression adjusting for stratification factors and other important prognostic variables, including baseline scores in the case of the QoR-40. The adjusted mean difference between the two groups together with 97.5% confidence intervals will be reported for each of the primary outcomes. Other continuous variables will be assessed using the same method. Binary outcomes will be assessed using chi-squared tests.

Discussion

The paper provides details of the planned statistical analyses for the SPAARK trial and aims to reduce the risk of outcome reporting bias from prior data knowledge. Any changes or deviations from this statistical analysis plan will be described and justified in the final study report.

Trial registration

ISRCTN54191675. Registered on 13 November 2017.

Opioid prescribing to preteen children undergoing ambulatory surgery in the United States

BACKGROUND

Overuse and misuse of opioids is a continuing crisis. The most common reason for children to receive opioids is postoperative pain, and they are often prescribed more than needed. The amount of opioids prescribed varies widely, even for minor ambulatory procedures. This study uses a large national sample to describe filled opioid prescriptions to preteen patients after all ambulatory surgical procedures and common standard procedures.

METHODS

We analyzed Truven Health MarketScan data for July 2012 through December 2016 to perform descriptive analyses of opioid fills by age and geographic area, change over time, second opioid fills in opioid-naïve patients, and variation in the types and amount of medication prescribed for 18 common and standard procedures in otolaryngology, urology, general surgery, ophthalmology, and orthopedics.

RESULTS

Over 10% of preteen children filled perioperative opioid prescriptions for ambulatory surgery in the period 2012 to 2016. The amount prescribed varied widely (median 5 days' supply, IQR 3-8, range 1-90), even for the most minor procedures, for example, frenotomy (median 4 days' supply, IQR 2-5, range 1-60). Codeine fills were common despite safety concerns. Second opioid prescriptions were filled by opioid-naïve patients after almost all procedures studied. The rate of prescribing declined significantly over time and varied substantially by age and across census regions.

CONCLUSIONS

We identified opioid prescribing outside of the norms of standard practice in all of the specialties studied. Standardizing perioperative opioid prescribing and developing guidelines on appropriate prescribing for children may reduce the opioids available for misuse and diversion.

Mechanisms, diagnosis, prevention and management of perioperative opioid-induced hyperalgesia

Opioid-induced hyperalgesia (OIH) occurs when opioids paradoxically enhance the pain they are prescribed to ameliorate. To address a lack of perioperative awareness, we present an educational review of clinically relevant aspects of the disorder. Although the mechanisms of OIH are thought to primarily involve medullary descending pathways, it is likely multifactorial with several relevant therapeutic targets. We provide a suggested clinical definition and directions for clinical differentiation of OIH from other diagnoses, as this may be confusing but is germane to appropriate management. Finally, we discuss prevention including patient education and analgesic management choices. As prevention may serve as the best treatment, patient risk factors, opioid mitigation, and both pharmacologic and non-pharmacologic strategies are discussed.

'Desire for more analgesic treatment': pain and patient-reported outcome after paediatric tonsillectomy and appendectomy

BACKGROUND

Insufficiently treated pain after paediatric appendectomy and tonsillectomy is frequent. We aimed to identify variables associated with poor patient-reported outcomes.

METHODS

This analysis derives from the European PAIN OUT infant registry providing information on perioperative pharmacological data and patient-reported outcomes 24 h after surgery. Variables associated with the endpoint 'desire for more pain treatment' were evaluated by elastic net regularisation (odds ratio [95% confidence interval]).

RESULTS

Data from children undergoing appendectomy (n=472) and tonsillectomy (n=466) between 2015 and 2019 were analysed. Some 24.8% (appendectomy) and 20.2% (tonsillectomy) wished they had received more pain treatment in the 24 h after surgery. They reported higher composite pain scores (5.2 [4.8-5.5] vs 3.6 [3.5-3.8]), more pain-related interference, and more adverse events than children not desiring more pain treatment, and they received more opioids after surgery (morphine equivalents (81 [60-102] vs 50 [43-56] μg kg^-1). Regression analysis revealed that pain-related sleep disturbance (appendectomy odds ratio: 2.8 [1.7-4.6], tonsillectomy 3.7 [2.1-6.5]; P<0.001) and higher pain intensities (1.5-fold increase) increased the probability of desiring more pain treatment. There was an inverse association between the number of different classes of non-opioids administered preventively, and the desire for more analgesics postoperatively. Children not receiving any non-opioid analgesics before the end of a tonsillectomy had a 3.5-fold (2.1-6.5-fold) increase in the probability of desiring more pain treatment, compared with children receiving at least two classes of different non-opioid analgesics.

CONCLUSIONS

Preventive administration of at least two classes of non-opioid analgesics is a simple strategy and may improve patient-reported outcomes.

Impact of a multimodal analgesic protocol modification on opioid consumption after cesarean delivery: a retrospective cohort study

INTRODUCTION

Adequate pain control is a mainstay in enhanced recovery after surgery (ERAS) protocols. ERAS protocols are widely accepted in colorectal and gynecologic surgeries and are increasingly implemented in the obstetric setting. Multimodal analgesia incorporating non-steroidal anti-inflammatory drugs (NSAIDs) and acetaminophen is a mainstay of ERAS protocols for cesarean delivery, but little research has focused on the choice of NSAIDs or timing of initiation in women undergoing cesarean delivery. At our institution, patients undergoing cesarean delivery receive a standardized multimodal analgesic regimen consisting of neuraxial morphine with NSAIDs and acetaminophen. Our initial protocol involved starting the oral analgesics in the recovery room. There was variability in whether these medications were given in a timely manner or withheld in the setting of postoperative nausea and vomiting. We modified this protocol and performed a retrospective analysis to assess the impact of this change on postoperative opioid rescue requirements in women undergoing cesarean delivery under neuraxial anesthesia.

METHODS

This retrospective analysis included patients who underwent cesarean deliveries from 1 July 2014 to 22 August 2017. With the initial analgesic protocol, patients received neuraxial morphine, followed by naproxen 500 mg PO Q12 hours and acetaminophen 650-975 mg PO Q6 hours initiated in the recovery room. After protocol revision in January 2016, the same neuraxial morphine dose was used in addition to acetaminophen 975 mg PR at the start of the case and ketorolac 15-30 mg IV at the end of the case. Postoperatively, patients received acetaminophen PO 975 mg Q6 hours, ketorolac IV 15 mg Q6 hours for 3 doses, transitioning to ibuprofen 600 mg Q6 hours. Fentanyl, oxycodone, and intravenous hydromorphone were given for breakthrough pain with both protocols. The primary outcome of the study is the need for rescue opioid analgesia. Secondary outcomes are total opioid usage, time to first rescue opioid, maximum reported pain scores, and need for rescue antiemetics. Univariate and multivariate analyses were performed controlling for variables significantly different between the two cohorts.

RESULTS

3250 patients were included in our analysis (1574 in the old protocol and 1676 in the new protocol). There was no significant difference in patient demographics or intraoperative characteristics between the two cohorts except for more primiparous women (25% vs. 17%), more Pfannenstiel incision (98% vs. 96%), and less repeat cesarean deliveries (40% vs. 44%) in the new protocol cohort. Need for rescue opioids was reduced with the new protocol at 2, 24, and 48 h [(36.46% vs. 75.73%, p < .0001), (74.28% vs 91.99%, p < .0001), (87.53% vs 95.49% p < .0001), respectively]. Among those who received opioids, opioid consumption over 48 h was reduced (median [IQR]: 55 [30, 95] vs. 40 [20, 70] mg oxycodone equivalents) after protocol revision (GMR 0.75, 95% CI 0.7, 0.80, p < .0001). The time to first rescue opioid medication was significantly longer in the new protocol compared to the old protocol (175 [79, 1057] min vs 51 [28, 104] min, p < .001).

CONCLUSION

There was a significant decrease in the need for and the dose of rescue opioid medications with the new protocol. This highlights the importance of optimizing the choice of agents, as well as route and timing of administration of the components of the postoperative multimodal analgesic regimen.

Postoperative Nausea and Vomiting in Pediatric Patients

Postoperative nausea and vomiting (PONV), postoperative vomiting (POV), post-discharge nausea and vomiting (PDNV), and opioid-induced nausea and vomiting (OINV) continue to be causes of pediatric morbidity, delay in discharge, and unplanned hospital admission. Research on the pathophysiology, risk assessment, and therapy for PDNV, OINV and pain therapy options in children has received increased attention. Multimodal pain management with the use of perioperative regional and opioid-sparing analgesia has helped decrease nausea and vomiting. Two common emetogenic surgical procedures in children are adenotonsillectomy and strabismus repair. Although PONV risk factors differ between adults and children, the approach to decrease baseline risk is similar. As PONV and POV are frequent in children, antiemetic prophylaxis should be considered for those at risk. A multimodal approach for antiemetic and pain therapy involves preoperative risk evaluation and stratification, antiemetic prophylaxis, and pain management with opioid-sparing medications and regional anesthesia. Useful antiemetics include dexamethasone and serotonin 5-hydroxytryptamine-3 (5-HT3) receptor antagonists such as ondansetron. Multimodal combination prophylactic therapy using two or three antiemetics from different drug classes and propofol total intravenous anesthesia should be considered for children at high PONV risk. "Enhanced recovery after surgery" protocols include a multimodal approach with preoperative preparation, adequate intravenous fluid hydration, opioid-sparing analgesia, and prophylactic antiemetics. PONV guidelines and management algorithms help provide effective postoperative care for pediatric patients.

Opioid-free anesthesia for adenotonsillectomy in children

INTRODUCTION

Opioids are administered during the intraoperative and postoperative periods in pediatric adenotonsillectomy and tonsillectomy. Non-opioid analgesics are often used as an analgesic during pediatric adenotonsillectomy and tonsillectomy. In this hypothesis generating study, we are evaluating safety and efficacy of stand-alone opioid analgesia for adenotonsillectomy and tonsillectomy.

METHODS

This is a single-center retrospective chart review of patients ages 2 to 13 who underwent elective adenotonsillectomy and tonsillectomy. We used a convenience sampling method to select patients who received intraoperative intravenous fentanyl, acetaminophen, ibuprofen, or any combination thereof. The following outcomes were analyzed in this study: (i) the length of Post Anesthesia Care Unit stay, (ii) administration of postoperative opioids; (iii) postoperative opioid equivalents required; (iv) administration of postoperative non-opioid analgesics; and (v) inpatient admission from ED within 30 days. We used univariate analysis to compare the data points.

RESULTS

We analyzed data from 323 patients who underwent adenotonsillectomy and tonsillectomy. The Post Anesthesia Care Unit length stay was similar for the intraoperative opioid-free and intraoperative opioid groups, 146.68 (±67.35) and 143.18 (±37.85) minutes, respectively (p = 0.586). Additionally, 102 patients (73.4%) in the intraoperative opioid-free group and 184 patients (83.2%) in the intraoperative opioid group did not receive any postoperative opioids (p = 0.033). The incidence of adverse events was similar between the intraoperative opioid-free and intraoperative opioid groups 3 (2.2%) and 5 (2.7%) respectively, p-value 0.749. A subgroup analysis comparing extracapsular 235 (72.8%) versus intracapsular 88 (27.2%) tonsillectomy yielded similar results.

CONCLUSION

In this study, our data indicates that American Society of Anesthesiologists I- II pediatric patients undergoing adenotonsillectomy and tonsillectomy can be efficiently and safely managed with an opioid-free intraoperative and postoperative analgesic regimen. Due to the explained limitations, our study results should be interpreted cautiously.

Postoperative Pain Management in Pediatric Spinal Fusion Surgery for Idiopathic Scoliosis

This article reviews and summarizes current evidence and knowledge gaps regarding postoperative analgesia after pediatric posterior spine fusion for adolescent idiopathic scoliosis, a common procedure that results in severe acute postoperative pain. Inadequate analgesia may delay recovery, cause patient dissatisfaction, and increase chronic pain risk. Despite significant adverse effects, opioids are the analgesic mainstay after scoliosis surgery. However, growing emphasis on opioid minimization and enhanced recovery has increased adoption of multimodal analgesia (MMA) regimens. While opioid adverse effects remain a concern, MMA protocols must also consider risks and benefits of adjunct medications. We discuss use of opioids via different administration routes and elaborate on the effect of MMA components on opioid/pain and recovery outcomes including upcoming regional analgesia. We also discuss risk for prolonged opioid use after surgery and chronic post-surgical pain risk in this population. Evidence supports use of neuraxial opioids at safe doses, low-dose ketorolac, and methadone for postoperative analgesia. There may be a role for low-dose ketamine in those who are opioid-tolerant or have chronic pain, but the evidence for preoperative gabapentinoids and intravenous lidocaine is currently insufficient. There is a need for further studies to evaluate pediatric-specific optimal MMA dosing regimens after scoliosis surgery. Questions remain regarding how best to prevent acute opioid tolerance, opioid-induced hyperalgesia, and chronic postsurgical pain. We anticipate that this timely update will enable clinicians to develop efficient pain regimens and provide impetus for future research to optimize recovery outcomes after spine fusion.

Perioperative pain control and tympanostomy tube outcomes

OBJECTIVE

To evaluate perioperative pain management regimens as they relate to tympanostomy tube outcomes.

STUDY DESIGN

Retrospective chart review.

SETTING

Tertiary referral children's hospital.

SUBJECTS

and Methods: The medical records of patients ≤18 years old who underwent tympanostomy tube placement were reviewed for indications, perioperative pain medications, post anesthesia recovery unit (PACU) measures, and tympanostomy tube occlusion rates.

RESULTS

Four hundred and fifty-five patients met inclusion criteria. Median age was 1.7 years (interquartile range: 1.2-3.3 years). Recurrent acute otitis media (n = 239, 52.5%) was the most common indication. All patients were American Society of Anesthesiologists (ASA) class 1 (n = 244, 58.1%) or 2 (n = 176, 41.9%). Fentanyl alone (n = 321, 70.6%) was the most common intraoperative analgesic administered followed by ketorolac alone (n = 40, 8.8%), and fentanyl and ketorolac together (n = 58, 12.8%). There was no significant difference in FLACC pain score at discharge and recovery time (minutes) also did not differ by intraoperative analgesia group (34.3 ± 15.2 for fentanyl; 36.2 ± 13.0 for ketorolac; 31.0 ± 12.5 for fentanyl and ketorolac together). Forty nine patients (11.6%) had an occluded tympanostomy tube at follow-up. Patients ≤1 year of age had a significantly higher risk of tube occlusion than patients >1 year of age (23.7% vs. 8.9%; p < 0.001). There was no significant difference in tube occlusion rates based on indication for tube placement, history of tube placement, intraoperative findings, or intraoperative pain regimen.

CONCLUSIONS

Ketorolac is a reasonable non-narcotic alternative to fentanyl which provides equal pain control and does not increase tube occlusion rates.

Race, Ethnicity, and Insurance: the Association with Opioid Use in a Pediatric Hospital Setting

BACKGROUND

This study examined the association between race/ethnicity and health insurance payer type with pediatric opioid and non-opioid ordering in an inpatient hospital setting.

METHODS

Cross-sectional inpatient encounter data from June 2013 to June 2018 was retrieved from a pediatric children's hospital in Southern California (N = 55,944), and statistical analyses were performed to determine associations with opioid ordering.

RESULTS

There was a significant main effect of race/ethnicity on opioid and non-opioid orders. Physicians ordered significantly fewer opioid medications, but a greater number of non-opioid medications, for non-Hispanic African American children than non-Hispanic Asian, Hispanic/Latinx, and non-Hispanic White pediatric patients. There was also a main effect of health insurance payer type on non-opioid orders. Patients with government-sponsored plans (e.g., Medi-Cal, Medicare) received fewer non-opioid prescriptions compared with patients with both HMO and PPO coverage. Additionally, there was a significant race/ethnicity by insurance interaction on opioid orders. Non-Hispanic White patients with "other" insurance coverage received the greatest number of opioid orders. In non-Hispanic African American patients, children with PPO coverage received fewer opioids than those with government-sponsored and HMO insurance. For non-Hispanic Asian patients, children with PPO were prescribed more opioids than those with government-sponsored and HMO coverage.

CONCLUSION

Findings suggest that the relationship between race/ethnicity, insurance type, and physician decisions opioid prescribing is complex and multifaceted. Given that consistency in opioid prescribing should be seen regardless of patient background characteristics, future studies should continue to assess and monitor unequitable differences in care.

Opioids in the Management of Acute Pediatric Pain: An Update in a Time of Crisis

Management of acute pain in children is fundamental to our practice. Its myriad benefits include reduced suffering, improved patient satisfaction, more rapid recovery, and a reduced risk of developing postsurgical chronic pain. Although a multimodal analgesic approach is now routinely used, informed and judicious use of opioid receptor agonists remains crucial in this treatment paradigm, as long as the benefits and risks are fully understood. Further, an ongoing public health response to the current opioid crisis is required to help prevent new cases of opioid addiction, identify opioid-addicted individuals, and ensure access to effective opioid addiction treatment, while at the same time continuing to safely meet the needs of patients experiencing pain.

The efficacy of transversus abdominis plane block for postoperative analgesia in laparoscopic cholecystectomy cases: a retrospective evaluation of 515 patients

Objective

To compare patients that received intravenous (i.v.) analgesics with those that received transversus abdominis plane (TAP) block for pain relief after laparoscopic cholecystectomy.

Methods

This retrospective study enrolled patients that had undergone laparoscopic cholecystectomy and divided them into two groups: the i.v. analgesic group (controls; group A) and the TAP block group (group T). Data retrieved from the medical records included postoperative visual analogue scale (VAS) pain scores, duration of intensive care unit (ICU) stay, total hospital stay, additional analgesic requirements and the occurrence of nausea and vomiting.

Results

A total of 515 patients were included (group A, n = 247; group T, n = 268). Postoperative VAS pain scores at 0, 2, 4 and 6 h and the need for additional analgesics were significantly lower in group T than in group A. Postoperative VAS pain scores at 12 and 24 h were significantly higher in group T than in group A. Postoperative nausea and vomiting were significantly lower in group T than in group A. The rate of ICU admission in group T was significantly lower than in group A.

Conclusions

Effective postoperative analgesia can be achieved with TAP block and undesirable effects can be reduced.

Perioperative Pain Management Following Otologic Surgery

Otologic surgery involves a broad range of procedures. In general, postoperative pain from most otologic surgeries can be managed with little to no opioids, and surgeons should make a concerted effort to minimize narcotic prescriptions in the midst of the opioid crisis. Many procedures, including transcanal surgeries and even postauricular surgeries, may performed with local anesthetic in selected patients. Multimodal pain regimens, local anesthesia, and alternative approaches have shown promise in minimizing narcotic use, and should be considered. Preoperative counseling to appropriately manage expectations and goals is imperative for patient satisfaction and safety.

Fewer postoperative opioids are associated with decreased duration of stay for children with perforated appendicitis

BACKGROUND

The impact of postoperative opioid use on outcomes for children with perforated appendicitis is unknown.

METHODS

A retrospective cohort study was performed using the Pediatric Health Information System database from 2005 to 2015. Children 2 to 18 years with perforated appendicitis who underwent an appendectomy were identified. Postoperative day analgesic use was categorized as nonopioid analgesia alone, opioids (with or without nonopioid analgesia), or no analgesics. The impact of postoperative opioid use on postoperative duration of stay and 30-day readmission was evaluated using multivariable mixed-effects regression analysis.

RESULTS

Overall, 47,726 children with perforated appendicitis were identified. On postoperative day 1, 17.7% received nonopioid analgesia alone, 77.6% received opioids, and 4.7% received no analgesics. On adjusted analysis, postoperative day 1 opioid use was associated with a 0.75-day (95% confidence interval: 0.54-0.96) increased postoperative duration of stay. Starting opioids after postoperative day 1 was associated with 2.21 days (95% confidence interval: 1.90-2.51) longer postoperative duration of stay. Among children who received opioids on postoperative day 1, continued use of opioids after postoperative day 1 was associated with a 1.88 day (95% confidence interval: 1.77-1.98) longer postoperative duration of stay. Postoperative day 1 opioid use did not significantly affect 30-day readmission.

CONCLUSION

Early and continued postoperative opioid use is associated with prolonged postoperative duration of stay in children undergoing appendectomy for perforated appendicitis. Minimizing opioid use, even on postoperative day 2, may result in a decreased postoperative duration of stay.

Perioperative Analgesia in Pediatric Patients Undergoing Otolaryngologic Surgery

This article reviews the evidence regarding current perioperative pain management strategies in pediatric patients undergoing otolaryngologic surgery. Pediatric otolaryngology is a broad field with a wide variety of surgical procedures that each requires careful consideration for optimal perioperative pain management. Adequate pain control is vital to ensuring patient safety and achieving successful postoperative care, but many young children are limited in their capacity to communicate their pain experience. Current literature holds a disproportionate amount of focus on pain management for certain procedures, whereas there is a paucity of evidence-based literature informing most other procedures within the field.

An update on the management of PONV in a pediatric patient

Postoperative nausea and vomiting (PONV) is a major cause of patient dissatisfaction following anesthesia. The difficulty in diagnosing nausea in much of the pediatric population has led to an emphasis on anti-emetic prophylaxis for all. Assessment scores and prognostic tools enable the anesthesiologist to identify patients who are at a greater risk and appropriately apply more aggressive prophylactic, multi-drug strategies. New antiemetics emerging from other medical disciplines, particularly oncology, may have potential use in prophylaxis and treatment of nausea and vomiting in the pediatric surgical population. New agents, many of which have a long duration of action, will augment the anesthesiologist's ability to adequately prevent PONV, and to treat persistent nausea and vomiting that extend beyond the immediate post-operative period.

Utilization of a Novel Opioid-Sparing Protocol in Primary Total Hip Arthroplasty Results in Reduced Opiate Consumption and Improved Functional Status

BACKGROUND

Total hip arthroplasty (THA) candidates have historically received high doses of opioids within the perioperative period; however, the amounts are being continually reduced as awareness of opioid abuse spreads. Here we seek to evaluate the effectiveness of a novel opiate-sparing protocol (OSP) for primary THAs in reducing opiate administrations, while maintaining similar levels of pain control and postoperative function.

METHODS

All patients undergoing primary THA between January 1, 2019 and June 30, 2019 were placed under a novel OSP. Data were prospectively collected as part of standard of care. To assess the primary outcome of opiate consumption, nursing documented opiate administration events were converted into morphine milligram equivalences (MMEs) per patient encounter per 24-hour interval. Postoperative pain and functional status were assessed as secondary outcomes using the Verbal Rating Scale for pain and the Activity Measure for Post-Acute Care scores, respectively.

RESULTS

One thousand fifty primary THAs had received our institution's OSP, and 953 patients were utilized as our historical control. OSP patients demonstrated significantly lower 0-24, 24-48, and 48-72 hours with less opiate administration variance (total MME: Control 75.55 ± 121.07 MME vs OSP 57.10 ± 87.48 MME; 24.42% decrease, P < .001). Although pain scores reached statistical significance between 0 and 12 (Control 2.09 vs OSP 2.36, P < .001), their differences were not clinically significant. Finally, OSP patients demonstrated a trend toward higher Activity Measure for Post-Acute Care scores across all 6 domains (total scores: Control 20.53 ± 3.67 vs OSP 20.76 ± 3.64, P = .18).

CONCLUSION

Implementation of an OSP can significantly decrease the utilization of opioids in the immediate postoperative period. Inpatient opioid administration can be significantly reduced while maintaining a comparable and non-inferior level of pain and function.

Enteral Acetaminophen Bioavailability in Pediatric Intensive Care Patients Determined With an Oral Microtracer and Pharmacokinetic Modeling to Optimize Dosing

OBJECTIVES

Decreasing morbidity and mortality by rationalizing drug treatment in the critically ill is of paramount importance but challenging as the underlying clinical condition may lead to large variation in drug disposition and response. New microtracer methodology is now available to gain knowledge on drug disposition in the intensive care. On the basis of studies in healthy adults, physicians tend to assume that oral doses of acetaminophen will be completely absorbed and therefore prescribe the same dose per kilogram for oral and IV administration. As the oral bioavailability of acetaminophen in critically ill children is unknown, we designed a microtracer study to shed a light on this issue.

DESIGN

An innovative microtracer study design with population pharmacokinetics.

SETTING

A tertiary referral PICU.

PATIENTS

Stable critically ill children, 0-6 years old, and already receiving IV acetaminophen.

INTERVENTIONS

Concomitant administration of an oral C radiolabeled acetaminophen microtracer (3 ng/kg) with IV acetaminophen treatment (15 mg/kg every 6 hr).

MEASUREMENTS

Blood was drawn from an indwelling arterial or central venous catheter up to 24 hours after C acetaminophen microtracer administration. Acetaminophen concentrations were measured by liquid chromatography-mass spectrometry and C concentrations by accelerated mass spectrometry.

MAIN RESULTS

In 47 patients (median age of 6.1 mo; Q1-Q3, 1.8-20 mo) the mean enteral bioavailability was 72% (range, 11-91%). With a standard dose (15 mg/kg 4 times daily), therapeutic steady-state concentrations were 2.5 times more likely to be reached with IV than with oral administration.

CONCLUSIONS

Microtracer studies present a new opportunity to gain knowledge on drug disposition in the intensive care. Using this modality in children in the pediatric intensive care, we showed that enteral administration of acetaminophen results in less predictable exposure and higher likelihood of subtherapeutic blood concentration than does IV administration. IV dosing may be preferable to ensure adequate pain relief.

Consensus Statement for the Prescription of Pain Medication at Discharge after Elective Adult Surgery

This Consensus Statement provides recommendations on the prescription of pain medication at discharge from hospital for opioid-naïve adult patients who undergo elective surgery. It encourages health care providers (surgeons, anesthesiologists, nurses/nurse practitioners, pain teams, pharmacists, allied health professionals, and trainees) to (1) use nonopioid therapies and reduce the prescription of opioids so that fewer opioid pills are available for diversion and (2) educate patients and their families/caregivers about pain management options after surgery to optimize quality of care for postoperative pain. These recommendations apply to opioid-naïve adult patients who undergo elective surgery. This consensus statement is intended for use by health care providers involved in the management and care of surgical patients. A modified Delphi process was used to reach consensus on the recommendations. First, the authors conducted a scoping review of the literature to determine current best practices and existing guidelines. From the available literature and expertise of the authors, a draft list of recommendations was created. Second, the authors asked key stakeholders to review and provide feedback on several drafts of the document and attend an in-person consensus meeting. The modified Delphi stakeholder group included surgeons, anesthesiologists, residents, fellows, nurses, pharmacists, and patients. After multiple iterations, the document was deemed complete. The recommendations are not graded because they are mostly based on consensus rather than evidence.

Narcotic-Sparing Approaches and the Shift Toward Paracetamol in Neonatal Intensive Care

Effective analgesia in neonates is relevant not only because of ethical aspects or empathy, but it is a crucial and integral part of medical and nursing care. However, there is also emerging evidence - although mainly in animal models - on the relation between the exposure to narcotics and impaired neurodevelopmental outcome, resulting in a CATCH-22 scenario. Consequently, a balanced approach is needed with the overarching intention to attain adequate pain management with minimal side effects. Despite the available evidence-based guidance on narcotics in ventilated neonates, observations on drug utilization still suggest an overall increase in exposure with extensive variability between units. This increased exposure over time and the extensive variability is concerning given the limited evidence of benefits and potential harm.Implementation strategies are effective to reduce exposure to narcotics but result in increased paracetamol exposure. We therefore summarized the evidence on paracetamol use in procedural pain management, in minor to moderate as well as major pain syndromes in neonates. While there are sufficient data on short-term safety, there are still concerns on long-term side effects. These concerns relate to neurobehavioral outcome, atopy or fertility, and are at present mainly driven by epidemiological perinatal observations, together with postulated mechanisms.We conclude that future clinical research objectives should still focus on the need to develop better assessment tools to quantify pain and on the need for high-quality data on long-term outcome of therapeutic interventions - also for paracetamol - and exploration of the mechanisms involved.

Evolving the management of acute perioperative pain towards opioid free protocols: a narrative review

Objective: Identification of pain as the fifth vital sign has resulted in over-prescription and overuse of opioids in the US, with addiction reaching epidemic proportions. In Europe, and more recently in the US, a shift has occurred with the global adoption of multimodal analgesia (MMA), which seeks to minimize perioperative opioid use. Improved functional outcomes and reduced healthcare utilization costs have been demonstrated with MMA, but wide scale use of opioids in pain management protocols continues. As a next step in the pain management evolution, opioid-free analgesia (OFA) MMA strategies have emerged as feasible in many surgical settings.Methods: Articles were limited to clinical studies and meta-analyses focusing on comparisons between opioid-intensive and opioid-free/opioid-sparing strategies published in English.Results: In this review, elimination or substantial reduction in opioid use with OFA strategies for perioperative acute pain are discussed, with an emphasis on improved pain control and patient satisfaction. Improved functional outcomes and patient recovery, as well as reduced healthcare utilization costs, are also discussed, along with challenges facing the implementation of such strategies.Conclusions: Effective MMA strategies have paved the way for OFA approaches to postoperative pain management, with goals to reduce opioid prescriptions, improve patient recovery, and reduce overall healthcare resource utilization and costs. However, institution-wide deployment and adoption of OFA is still in early stages and will require personalization and better management of patient expectations.

Opioid free onco-anesthesia: Is it time to convict opioids? A systematic review of literature

The epidemic of opioid crisis started getting recognised as a public health emergency in view of increasing opioid-related deaths occurring due to undetected respiratory depression. Prescribing opioids at discharge has become an independent risk factor for chronic opioid use, following which, prescription practices have undergone a radical change. A call to action has been voiced recently to end the opioid epidemic although with the pain practitioners still struggling to make opioids readily available. American Society of Anesthesiologist (ASA) has called for reducing patient exposure to opioids in the surgical setting. Opioid sparing strategies have emerged embracing loco-regional techniques and non-opioid based multimodal pain management whereas opioid free anesthesia is the combination of various opioid sparing strategies culminating in complete elimination of opioid usage. The movement away from opioid usage perioperatively is a massive but necessary shift in anesthesia which has rationalised perioperative opioid usage. Ideal way moving forward would be to adapt selective low opioid effective dosing which is both procedure and patient specific while reserving it as rescue analgesia, postoperatively. Many unknowns persist in the domain of immunologic effects of opioids, as complex interplay of factors gets associated during real time surgery towards outcome. At present it would be too premature to conclude upon opioid-induced immunosuppression from the existing evidence. Till evidence is established, there are no recommendations to change current clinical practice. At the same time, consideration for multimodal opioid sparing strategies should be initiated in each patient undergoing surgery.

[Preemptive nebulized ketamine for pain control after tonsillectomy in children: randomized controlled trial]

OBJECTIVES

The administration of ketamine as nebulized inhalation is relatively new and studies on nebulized ketamine are scarce. We aimed to investigate the analgesic efficacy of nebulized ketamine (1 and 2mg.kg^-1) administered 30min before general anesthesia in children undergoing elective tonsillectomy in comparison with intravenous ketamine (0.5mg.kg^-1) and saline placebo.

METHODS

One hundred children aged (7-12) years were randomly allocated in four groups (n=25) receive; Saline Placebo (Group C), Intravenous Ketamine 0.5mg.kg^-1 (Group K-IV), Nebulized Ketamine 1mg.kg^-1 (Group K-N1) or 2mg.kg^-1 (Group K-N2). The primary endpoint was the total consumption of rescue analgesics in the first 24h postoperative.

RESULTS

The mean time to first request for rescue analgesics was prolonged in K-N1 (400.9±60.5min, 95% CI 375.9-425.87) and K-N2 (455.5±44.6min, 95% CI 437.1-473.9) groups compared with Group K-IV (318.5±86.1min, 95% CI 282.9-354.1) and Group C (68.3±21.9min, 95% CI 59.5-77.1; p<0.001), with a significant difference between K-N1 and K-N2 Groups (p<0.001). The total consumption of IV paracetamol in the first 24h postoperative was reduced in Group K-IV (672.6±272.8mg, 95% CI 559.9-785.2), Group K-N1 (715.6±103.2mg, 95% CI 590.4-840.8) and Group K-N2 (696.6±133.3mg, 95% CI 558.8-834.4) compared with Control Group (1153.8±312.4mg, 95% CI 1024.8-1282.8; p<0.001). With no difference between intravenous and Nebulized Ketamine Groups (p=0.312). Patients in intravenous and Nebulized Ketamine Groups showed lower postoperative VRS scores compared with Group C (p<0.001), no differences between K-IV, K-N1 or K-N2 group and without significant adverse effects.

CONCLUSION

Preemptive nebulized ketamine was effective for post-tonsillectomy pain relief. It can be considered as an effective alternative route to IV ketamine.

Preemptive nebulized ketamine for pain control after tonsillectomy in children: randomized controlled trial

Objectives

The administration of ketamine as nebulized inhalation is relatively new and studies on nebulized ketamine are scarce. We aimed to investigate the analgesic efficacy of nebulized ketamine (1 and 2 mg.kg⁻¹) administered 30 min before general anesthesia in children undergoing elective tonsillectomy in comparison with intravenous ketamine (0.5 mg.kg⁻¹) and saline placebo.

Methods

One hundred children aged (7–12) years were randomly allocated in four groups (n = 25) receive; Saline Placebo (Group C), Intravenous Ketamine 0.5 mg.kg⁻¹ (Group K-IV), Nebulized Ketamine 1 mg.kg⁻¹ (Group K-N1) or 2 mg.kg⁻¹ (Group K-N2). The primary endpoint was the total consumption of rescue analgesics in the first 24 h postoperative.

Results

The mean time to first request for rescue analgesics was prolonged in K-N1 (400.9 ± 60.5 min, 95% CI 375.9–425.87) and K-N2 (455.5 ± 44.6 min, 95% CI 437.1–473.9) groups compared with Group K-IV (318.5 ± 86.1 min, 95% CI 282.9–354.1) and Group C (68.3 ± 21.9 min, 95% CI 59.5–77.1; p < 0.001), with a significant difference between K-N1 and K-N2 Groups (p < 0.001). The total consumption of IV paracetamol in the first 24 h postoperative was reduced in Group K-IV (672.6 ± 272.8 mg, 95% CI 559.9–785.2), Group K-N1 (715.6 ± 103.2 mg, 95% CI 590.4–840.8) and Group K-N2 (696.6 ± 133.3 mg, 95% CI 558.8–834.4) compared with Control Group (1153.8 ± 312.4 mg, 95% CI 1024.8–1282.8; p < 0.001). With no difference between intravenous and Nebulized Ketamine Groups (p = 0.312). Patients in intravenous and Nebulized Ketamine Groups showed lower postoperative VRS scores compared with Group C (p < 0.001), no differences between K-IV, K-N1 or K-N2 group and without significant adverse effects.

Conclusion

Preemptive nebulized ketamine was effective for post-tonsillectomy pain relief. It can be considered as an effective alternative route to IV ketamine.