Postoperative paediatric pain prevalence: A retrospective analysis in a university teaching hospital

The Impact of Opioid Receptor Gene Polymorphism on Fentanyl and Alfentanil's Analgesic Effects in the Pediatric Perioperative Period

Introduction

The polymorphism of the gene coding mu-opioid receptor (OPRM1) is one of the factors contributing to the variability in the response to opioid analgesics in children. The goal of this study is to investigate its role in association with postoperative acute pain in children of various ages.

Methods

This prospective study analyzed 110 pediatric patients, after plastic or orthopedic surgery, who were genotyped and randomly assigned to receive fentanyl or alfentanil. Postoperative pain was rated using Numerical Rating Scale (0-10). All the patients were genotyped forOPRM1 118A>G (rs1799971) gene polymorphism.

Results

School children under the age of 11 with the OPRM1 AA genotype were shown to have a higher BMI (p<0.05). Children over the age of 12 carrying G allele OPRM1, had increased postoperative pain sensitivity and intensity (3.28±1.95 vs 4.91±2.17; p<0.05), as compared to AA allele carriers.

Discussion

OPRM1 118A>G polymorphism may explain the variation in the perception of postoperative pain in children over the age of 12 and may be a useful predictor for adjusting the dose of analgesics, but the dose is relative to the patient's needs regardless of his genetic characteristics. In younger children, carriers of polymorphic OPRM1 118G allele may be protected from obesity, due to diminished MOP expression.

Diclofenac for acute postoperative pain in children

BACKGROUND

Many children undergo various surgeries, which often lead to acute postoperative pain. This pain influences recovery and quality of life. Non-steroidal anti-inflammatory drugs (NSAIDs), specifically cyclo-oxygenase (COX) inhibitors such as diclofenac, can be used to treat pain and reduce inflammation. There is uncertainty regarding diclofenac's benefits and harms compared to placebo or other drugs for postoperative pain.

OBJECTIVES

To assess the efficacy and safety of diclofenac (any dose) for acute postoperative pain management in children compared with placebo, other active comparators, or diclofenac administered by different routes (e.g. oral, rectal, etc.) or strategies (e.g. 'as needed' versus 'as scheduled').

SEARCH METHODS

We used standard, extensive Cochrane search methods. We searched CENTRAL, MEDLINE, and trial registries on 11 April 2022.

SELECTION CRITERIA

We included randomised controlled trials (RCTs) in children under 18 years of age undergoing surgery that compared diclofenac (delivered in any dose and route) to placebo or any active pharmacological intervention. We included RCTs comparing different administration routes of diclofenac and different strategies.

DATA COLLECTION AND ANALYSIS

We used standard methodological procedures expected by Cochrane. Our primary outcomes were: pain relief (PR) reported by the child, defined as the proportion of children reporting 50% or better postoperative pain relief; pain intensity (PI) reported by the child; adverse events (AEs); and serious adverse events (SAEs). We presented results using risk ratios (RR), mean differences (MD), and standardised mean differences (SMD), with the associated confidence intervals (CI).

MAIN RESULTS

We included 32 RCTs with 2250 children. All surgeries were done using general anaesthesia. Most studies (27) included children above age three. Only two studies had an overall low risk of bias; 30 had an unclear or high risk of bias in one or several domains. Diclofenac versus placebo (three studies) None of the included studies reported on PR or PI. We are very uncertain about the benefits and harms of diclofenac versus placebo on nausea/vomiting (RR 0.83, 95% CI 0.38 to 1.80; 2 studies, 100 children) and any reported bleeding (RR 3.00, 95% CI 0.34 to 26.45; 2 studies, 100 children), both very low-certainty evidence. None of the included studies reported SAEs. Diclofenac versus opioids (seven studies) We are very uncertain if diclofenac reduces PI at 2 to 24 hours postoperatively compared to opioids (median pain intensity 0.3 (interquartile range (IQR) 0.0 to 2.5) for diclofenac versus median 0.7 (IQR 0.1 to 2.4) in the opioid group; 1 study, 50 children; very low-certainty evidence). None of the included studies reported on PR or PI for other time points. Diclofenac probably results in less nausea/vomiting compared to opioids (41.0% in opioids, 31.0% in diclofenac; RR 0.75, 95% CI 0.58 to 0.96; 7 studies, 463 participants), and probably increases any reported bleeding (5.4% in opioids, 16.5% in diclofenac; RR 3.06, 95% CI 1.31 to 7.13; 2 studies, 222 participants), both moderate-certainty evidence. None of the included studies reported SAEs. Diclofenac versus paracetamol (10 studies) None of the included studies assessed child-reported PR. Compared to paracetamol, we are very uncertain if diclofenac: reduces PI at 0 to 2 hours postoperatively (SMD -0.45, 95% CI -0.74 to -0.15; 2 studies, 180 children); reduces PI at 2 to 24 hours postoperatively (SMD -0.64, 95% CI -0.89 to -0.39; 3 studies, 300 children); reduces nausea/vomiting (RR 0.47, 95% CI 0.25 to 0.87; 5 studies, 348 children); reduces bleeding events (RR 0.57, 95% CI 0.12 to 2.62; 5 studies, 332 participants); or reduces SAEs (RR 0.50, 95% CI 0.05 to 5.22; 1 study, 60 children). The evidence certainty was very low for all outcomes. Diclofenac versus bupivacaine (five studies) None of the included studies reported on PR or PI. Compared to bupivacaine, we are very uncertain about the effect of diclofenac on nausea/vomiting (RR 1.28, 95% CI 0.58 to 2.78; 3 studies, 128 children) and SAEs (RR 4.52, 95% CI 0.23 to 88.38; 1 study, 38 children), both very low-certainty evidence. Diclofenac versus active pharmacological comparator (10 studies) We are very uncertain about the benefits and harms of diclofenac versus any other active pharmacological comparator (dexamethasone, pranoprofen, fluorometholone, oxybuprocaine, flurbiprofen, lignocaine), and for different routes and delivery of diclofenac, due to few and small studies, no reporting of key outcomes, and very low-certainty evidence for the reported outcomes. We are unable to draw any meaningful conclusions from the numerical results.

AUTHORS' CONCLUSIONS

We remain uncertain about the efficacy of diclofenac compared to placebo, active comparators, or by different routes of administration, for postoperative pain management in children. This is largely due to authors not reporting on clinically important outcomes; unclear reporting of the trials; or poor trial conduct reducing our confidence in the results. We remain uncertain about diclofenac's safety compared to placebo or active comparators, except for the comparison of diclofenac with opioids: diclofenac probably results in less nausea and vomiting compared with opioids, but more bleeding events. For healthcare providers managing postoperative pain, diclofenac is a COX inhibitor option, along with other pharmacological and non-pharmacological approaches. Healthcare providers should weigh the benefits and risks based on what is known of their respective pharmacological effects, rather than known efficacy. For surgical interventions in which bleeding or nausea and vomiting are a concern postoperatively, the risks of adverse events using opioids or diclofenac for managing pain should be considered.

Practice of Postoperative Pain Management in Under-Five Children in A Tertiary Hospital: A Prospective Crossectional Study

Background

Despite advancements in pain management, children have remained undertreated for postoperative pain. Data regarding the practice of post-operative pain management in paediatric patients remains less available in the developing world. This study was aimed at evaluating practice of postoperative pain management in under five children.

Methods

A prospective cross sectional one-year study was conducted on all paediatric patients who underwent major paediatric surgical procedures from February 1, 2020 to January31, 2021, at a tertiary hospital in Addis Ababa, Ethiopia.

Result

A single type of analgesic medication was used in 67.1% patients. Analgesic medications were administered on standing base only in 64.4% of patients. Patients' charts had no documentation of pain assessment both in the neonatal intensive care units and wards.32.89 % of assessed patients had moderate to severe pain record.

Conclusion

Significant number of patients suffer from postoperative pain because of absence of proper pain assessment and inadequate administration of analgesic medication.

Diclofenac for acute postoperative pain in children

This is a protocol for a Cochrane Review (intervention). The objectives are as follows:

To assess the efficacy and safety of diclofenac (any dose) for acute postoperative pain management in children compared with placebo, other active comparators, or diclofenac administered by either different routes (e.g. oral, rectal, etc.) or strategies (e.g. as needed versus as scheduled).

Educational Intervention to Strengthen Pediatric Postoperative Pain Management: A Cluster Randomized Trial

BACKGROUND

Pediatric postoperative pain is still undertreated.

AIMS

To assess whether educational intervention increases nurses' knowledge and improves pediatric postoperative pain management.

DESIGN

Cluster randomized controlled trial with three measurement points (baseline T1, 1 month after intervention T2, and 6 months after intervention T3).

PARTICIPANTS/SUBJECTS

The study was conducted in postanesthesia care units at six hospitals in Norway. Nurses working with children in the included units and children who were undergoing surgery were invited to participate in this study.

METHODS

Nurses were cluster randomized by units to an intervention (n = 129) or a control group (n = 129). This allocation was blinded for participants at baseline. Data were collected using "The Pediatric Nurses' Knowledge and Attitudes Survey Regarding Pain: Norwegian Version" (primary outcome), observations of nurses' clinical practice, and interviews with children. The intervention included an educational day, clinical supervision, and reminders.

RESULTS

At baseline 193 nurses completed the survey (75% response rate), 143 responded at T2, and 107 at T3. Observations of nurses' (n = 138) clinical practice included 588 children, and 38 children were interviewed. The knowledge level increased from T1 to T3 in both groups, but there was no statistically significant difference between the groups. In the intervention group, there was an improvement between T1 and T2 in the total PNKAS-N score (70% vs. 83%), observed increase use of pain assessment tools (17% vs. 39%), and children experienced less moderate-to-severe pain.

CONCLUSIONS

No significant difference was observed between the groups after intervention, but a positive change in knowledge and practice was revealed in both groups. Additional studies are needed to explore the most potent variables to strengthen pediatric postoperative pain management.

The evidence supporting the association between the use of pain scales and outcomes in hospitalized children: A systematic review

BACKGROUND

Systematic use of pain intensity scales is considered a prerequisite for treatment of pain in hospitalized children, but already a decade ago, attention was called to the lack of robust evidence supporting the presumed positive association between their use and desired outcomes.

OBJECTIVES

To re-evaluate the evidence supporting the association between the use of pain scales and patient and process outcomes in hospitalized children.

DESIGN

Systematic literature review.

DATA SOURCES

The online databases PubMed and Cumulative Index of Nursing and Allied Health Literature (CINAHL) were searched from inception to April 15, 2020.

REVIEW METHODS

We performed single screening of all records followed by duplicate screening of full texts of interest with a disagreement procedure in place. Studies where the authors evaluated outcomes from the use of self-report or behavioral-based pain scales in children 0-18 years in a hospital setting were included. Emergency care settings were excluded.

RESULTS

In a majority of the 32 included studies, complex interventions that included one or more pain scales were evaluated. Process outcomes (e.g., documentation) were most frequently studied. Interventions were commonly associated with improved documentation of pain assessment, while the effect on pain management documentation was inconsistent. However, improvements in process outcomes did not necessarily result in better patient outcomes. In regard to patient outcomes (e.g., pain intensity, side effects, or satisfaction with treatment), some authors reported reduced pain intensity on group level, but the effect on other functional outcomes, child and parent satisfaction, and aspects of safety were inconsistent. Methodological issues, e.g., weak study designs and small samples, biased the results, and it was not possible to determine how pain scales contributed to the overall effects since they were studied as part of complex interventions.

CONCLUSIONS

Although both a theoretically founded understanding of pain and clinical experience suggest that the use of pain scales will make a difference for hospitalized children with pain, there is still limited evidence to support this notion. As pain scales have been almost exclusively studied as an aspect of complex interventions, research that determines the active ingredient(s) in a complex intervention and their joint and individual effects on outcomes that are meaningful for the child (for example reduced pain intensity or improved function) are urgently needed. Tweetable abstract: Limited #research supports association between use of pediatric #pain scales and patient outcomes @_randida @PainPearl.

Using ways of knowing in nursing to develop educational strategies that support knowledge mobilization

There are continued challenges in achieving effective pain management for children and young people (CYP). Research has found several barriers to effective CYP pain management, which include, but are not limited to, deficiencies in knowledge among nurses and other healthcare professionals. Calls for improvements in and an increase in pain education ensue, in the expectation that an increase in knowledge will lead to an improved pain care for patients. Educational initiatives, as reported in the literature, have tended to focus on increasing empirical knowledge which has not resulted in the anticipated improvements in practice. An exploration of Carper's and Chinn & Kramer's five ways of knowing helps demonstrate why an over-reliance on empirics fails to equip nurses for the realities of clinical practice and does not facilitate knowledge mobilization or improvements in pain care for CYP. In this paper, we explore these ways of knowing to produce a model for knowledge mobilization in (pain) education. Our model puts forward a multifaceted approach to education using the active learning principles which supports and equip nurses to become effective pain practitioners.

The Predictors of Postoperative Pain Among Children Based on the Theory of Unpleasant Symptoms: A Descriptive-Correlational Study

PURPOSE

Postoperative pain (POP) is a common outcome of surgical interventions among children. Identifying POP contributing factors can help identify children who are at risk for POP and facilitate POP management. The aim of the study was to determine the predictors of POP based on the Theory of Unpleasant Symptoms.

DESIGN AND METHODS

This descriptive-correlational study was conducted in 2018-2019 on 153 children purposively recruited. Data were collected using a personal characteristics questionnaire, the Coping Strategies Questionnaire, the Child Pain Anxiety Symptoms Scale, and a Visual Analogue Scale for Pain. The SPSS software (v. 21.0) was used for data analysis.

RESULTS

Twelve participants were excluded and final data analysis was done on the data obtained from 141 participants. Most of participants were male (65.2%), underwent abdominal surgery (53.2%), and experienced POP (86.5%). Their age mean was 8.58±2.23. Linear regression analysis revealed that the physiological factors of heart rate, preoperative pain, and surgery duration as well as the psychological factors of anxiety and coping strategies were significant predictors of POP among children. All these factors collectively explained 34% of the total variance of POP. Situational factors (such as age, gender, and ethnicity) had no significant effects on POP.

CONCLUSIONS

Heart rate, preoperative pain, surgery duration, anxiety and coping as predictive factors of POP can be considered when designing effective POP management strategies.

PRACTICE IMPLICATIONS

The findings provide a better understanding about the predictors of POP and can be used to develop pain management among children.

Agreement of Postoperative Pain Assessment by Parents and Clinicians in Children Undergoing Orthopedic Surgery

BACKGROUND

Postoperative pain assessment in children is crucial for proper nursing care. However, research on the agreement of these assessments with a patient's self-reported pain level is lacking. The aim was to investigate the agreement between patients' subjective postoperative pain and corresponding observers' pain assessments.

METHODS

In children who underwent orthopedic limb surgery, we investigated the agreement between their reported pain levels and observers' pain assessments using the Numeric Pain Rating Scale (NPRS) and the Faces Pain Scale-Revised (FPS-R) on postoperative day 1. The parents (specifically the mother) and clinicians (a doctor and a nurse in the field of pediatric orthopedics) participated as observers. Reliabilities using intraclass correlation coefficients (ICCs) and correlations using Spearman's coefficients (rs) were calculated.

RESULTS

The patients' pain intensities (2.1± 2.1 [NPRS] and 2.0 ± 1.9 [FPS-R]) were overestimated by parents (2.5 ± 2.0 [NPRS], p = .022), but underestimated by clinicians (1.5 ± 1.2 [NPRS], p < .001, and 1.5 ± 1.2 [FPS-R], p = .006). The overall reliabilities between parents and patients were good (ICCs > 0.75 for both NPRS and FPS-R), and the correlations between them were even strong in some circumstances, such as when the patient was a girl, the diagnostic type was a disease, or the lower extremity was operated (rss > 0.7). However, the agreements between clinicians and patients were only moderate.

CONCLUSIONS

The subjective pediatric postoperative pain intensities had different agreements according to the observers. The parents' assessments should be considered for the accurate assessments, but their tendency to overestimate their children's pain should also be taken into account.

Pre-emptive scalp infiltration with ropivacaine plus methylprednisolone versus ropivacaine alone for relief of postoperative pain after craniotomy in children (RP/MP vs RP): a study protocol for a randomised controlled trial

INTRODUCTION

Pre-emptive scalp infiltration with local anaesthetics is the simplest and most effective method to prevent postoperative incisional pain. However, local infiltration of an anaesthetic only provides relatively short-term pain relief. Methylprednisolone (MP) treatment, administered as an adjuvant at the wound site, has been shown to provide satisfactory pain management after lumbar laminectomy. However, there is no evidence regarding the efficacy of MP infiltration for the relief of postoperative pain after craniotomy. Currently, postoperative pain after craniotomy in children is undertreated. Therefore, we aim to investigate whether pre-emptive scalp infiltration with ropivacaine (RP) plus MP is superior to RP alone to improve postoperative pain after craniotomy in children.

METHODS AND ANALYSIS

The RP/MP versus RP trial is a prospective, single-centre, randomised, parallel-group study of 100 children aged 8-18 years undergoing intracranial surgery. Participants will be randomly allocated to receive pre-emptive scalp infiltration with either RP plus MP or RP alone. The primary outcome will be the cumulative fentanyl dose administered by patient-controlled intravenous analgesia within 24 hours postoperatively. The secondary outcomes will include postoperative Numerical Rating Scale scores, pain control satisfaction scores, length of stay and adverse events. Data will be analysed by the intention-to-treat principle.

ETHICAL APPROVAL AND DISSEMINATION

The study protocol has been approved by the Institutional Review Board of Beijing Tiantan Hospital Affiliated to Capital Medical University (Approval Number: KY 2018-066-02). The results will be disseminated in international academic meetings and published in peer-reviewed journals.

TRIAL REGISTRATION NUMBER

NCT03636165; Pre-results.

Children's views on postsurgical pain in recovery units in Norway: A qualitative study

AIMS AND OBJECTIVES

To explore children's postsurgical experiences with pain and pain management in the recovery unit.

BACKGROUND

Children's pain is underestimated and undertreated. Untreated pain can cause unnecessary suffering, increased complication risks and may lead to chronic pain. Research exploring children's experiences with postoperative pain and pain management is limited.

DESIGN

A qualitative, exploratory study. The study complied with the Consolidated Criteria for Reporting Qualitative Research (COREQ).

METHODS

Children (N = 20), 8-16 years old, took part in semi-structured interviews about their experiences with pain and postoperative pain management while they were in a recovery unit. Data were collected at two university hospitals in Norway. Content analysis was used to analyse the data.

RESULTS

Three themes emerged from the interviews: "children's experiences of what felt unpleasant and painful," "children's experiences with pain management" and "children's recommendations for future pain management". About half of the children reported moderate to severe pain while in the recovery unit and they did not always tell their nurses when they had pain. They also reported experiencing pain in places other than their surgical wounds and stated that nausea and vomiting felt unpleasant and painful. The children indicated that pain medications and the use of nonpharmacological methods helped them cope with their pain and provided several recommendations about how to improve pain management.

CONCLUSION

Paediatric postoperative pain management remains suboptimal. The children in our study provided useful information about their pain experiences, how to improve pain management and explained why they did not tell their nurses when they were in pain.

RELEVANCE TO CLINICAL PRACTICE

These findings should direct further improvements in paediatric postoperative pain management, such as increased use of pain assessment tools and preparatory information, as well as more appropriate administration of pain medications.