Pain and its effects in the human neonate and fetus

An Evidence-Based Discussion of Fetal Pain and Stress

BACKGROUND

The concept of fetal pain results from procedures conducted without anesthesia in preterm newborns and fetuses, which indicate that it is possible to examine fetal pain based on stress hormone, metabolic, and behavioral changes. Anatomical and physiological data suggest that fetuses become capable of processing nociceptive stimuli around midgestation, although the associated changes in fetal brain development remain unclear. What constitutes fetal pain remains controversial in the light of the definition of pain adopted by the International Association for the Study of Pain (IASP), which posits pain as an "unpleasant sensory and emotional experience."

SUMMARY

Here, we examine the notion that human fetuses cannot "experience" pain and potential implications of this claim. We highlight the key scientific evidence related to fetal pain, including clinical studies on pain in fetuses and preterm newborns. We argue that consistent patterns of stress hormones, metabolic changes, body movements, hemodynamic changes, and pain-related facial expressions in fetuses exposed to invasive procedures overcome the need for subjective proof of pain as articulated in the IASP definition. No study to date has conclusively proven the absence of fetal pain beyond the age of viability.

KEY MESSAGES

Based on the current evidence, we propose that all fetuses receive anesthesia regardless of the invasive procedures being performed to guarantee the least possible pain and physiological, behavioral, or hormonal responses without exposing the mother or her baby to unnecessary complications.

Institutional and Regional Variation in Opioid Prescribing for Hospitalized Infants in the US

Importance

High-risk infants, defined as newborns with substantial neonatal-perinatal morbidities, often undergo multiple procedures and require prolonged intubation, resulting in extended opioid exposure that is associated with poor outcomes. Understanding variation in opioid prescribing can inform quality improvement and best-practice initiatives.

Objective

To examine regional and institutional variation in opioid prescribing, including short- and long-acting agents, in high-risk hospitalized infants.

Design, Setting, and Participants

This retrospective cohort study assessed high-risk infants younger than 1 year from January 1, 2016, to December 31, 2022, at 47 children's hospitals participating in the Pediatric Health Information System (PHIS). The cohort was stratified by US Census region (Northeast, South, Midwest, and West). Variation in cumulative days of opioid exposure and methadone treatment was examined among institutions using a hierarchical generalized linear model. High-risk infants were identified by International Statistical Classification of Diseases and Related Health Problems, Tenth Revision codes for congenital heart disease surgery, medical and surgical necrotizing enterocolitis, extremely low birth weight, very low birth weight, hypoxemic ischemic encephalopathy, extracorporeal membrane oxygenation, and other abdominal surgery. Infants with neonatal opioid withdrawal syndrome, in utero substance exposure, or malignant tumors were excluded.

Exposure

Any opioid exposure and methadone treatment.

Main Outcomes and Measures

Regional and institutional variations in opioid exposure.

Results

Overall, 132 658 high-risk infants were identified (median [IQR] gestational age, 34 [28-38] weeks; 54.5% male). Prematurity occurred in 30.3%, and 55.3% underwent surgery. During hospitalization, 76.5% of high-risk infants were exposed to opioids and 7.9% received methadone. Median (IQR) length of any opioid exposure was 5 (2-12) cumulative days, and median (IQR) length of methadone treatment was 19 (7-46) cumulative days. There was significant hospital-level variation in opioid and methadone exposure and cumulative days of exposure within each US region. The computed intraclass correlation coefficient estimated that 16% of the variability in overall opioid prescribing and 20% of the variability in methadone treatment was attributed to the individual hospital.

Conclusions and Relevance

In this retrospective cohort study of high-risk hospitalized infants, institution-level variation in overall opioid exposure and methadone treatment persisted across the US. These findings highlight the need for standardization of opioid prescribing in this vulnerable population.

The effect of music on pain management in preterm infants during daily painful procedures: a systematic review and meta-analysis

Background

The present systematic review and meta-analysis of randomized controlled trials (RCTs) was conducted to investigate the effects of music on pain management in preterm neonates during painful procedures.

Methods

The PubMed, Embase, Web of Science, EBSCO and Cochrane Library databases were searched to identify relevant articles published from their inception to September 2023. The study search strategy and all other processes were implemented in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement.

Results

Four RCTs that satisfied the inclusion criteria were included in this meta-analysis. The music group had significantly lower Premature Infant Pain Profile (PIPP) scores during (RR = -1.21; 95% CI = -2.02--0.40, p = 0.0032) and after painful procedures (RR = -0.65; 95% CI = -1.06--0.23, p = 0.002). The music group showed fewer changes in PIPP scores after invasive operations than did the control group (RR = -2.06; 95% CI -3.16--0.96; p = 0.0002). Moreover, our results showed that music improved oxygen saturation during (RR = 3.04, 95% CI = 1.64-4.44, p < 0.0001) and after painful procedures (RR = 3.50, 95% CI = 2.11-4.90, p < 0.00001). However, the change in peak heart rate during and after painful procedures was not statistically significant (RR = -12.14; 95% CI = -29.70-5.41 p = 0.18; RR = -10.41; 95% CI = -22.72-1.90 p = 0.10).

Conclusion

In conclusion, this systematic review demonstrated that music interventions are effective for relieving procedural pain in preterm infants. Our results indicate that music can reduce stress levels and improve blood oxygen saturation. Due to the current limitations, large-scale, prospective RCTs should be performed to validate the present results.

Neonatal pain management practices in Somali region of Ethiopia: insights from neonatal intensive care unit providers

Background

Neonates admitted to neonatal intensive care units experience an average of 8-17 moderate to severe painful procedures per day. Because neonates lack the cognitive capacity to express their pain's location or severity, they are very dependent on healthcare providers to recognize, assess, and manage their pain. The health and development of newborns are negatively impacted by persistent or untreated pain experienced early in life. Therefore, studying neonatal pain management practices and associated factors in healthcare is critical to tackling workforce problems, enhancing neonatal care, and lowering the long-term health impacts of neonates.

Method

From January 1 to 30, 2023, a facility-based cross-sectional study design was used at six public hospitals in the Somali region of Ethiopia. A total of 336 healthcare providers enrolled using a simple random sample technique. A self-administered, structured questionnaire was utilized to collect the data. The analyses used bivariate and multivariate logistic regression. To find the association between the outcome and predictor factors, the odd ratio and the 95% CI were computed.

Result

The study revealed that 35.4% [95% CI 30.4%-40.5%] of respondents reported that they had good neonatal pain management practices. Ever having undergone training in neonatal pain assessment and management [AOR = 2.26 (95% CI 1.259, 4.07)], availability of pain assessment tools [AOR = 3.05 (95% CI 1.249, 7.469)], and having a favorable attitude toward neonatal pain management practice [AOR = 3.71 (95% CI 1.525, 9.035)] were found to be factors with a significant association with neonatal pain management practice.

Conclusion

Based on the study's findings, there is a low level of neonatal pain management practice among healthcare providers in the Somali region. The study emphasizes the significance of having access to pain assessment tools and the requirement for healthcare professionals to get training on neonatal pain assessment and management.

An Analgesic Technique for Orogastric Tube Insertion in Newborns: DOLATSONG, a Randomized Multicentric Controlled Trial

BACKGROUND

Gastric tube insertion is necessary to support early enteral feeding of newborns during their neonatal intensive care stay. This frequent and invasive procedure is known to be painful. Very few analgesic techniques (sweet solutions, sucking, swaddling, and skin-to-skin contact) are available to reduce the pain caused by orogastric tube insertion procedure.

OBJECTIVE

To determine whether a new orogastric tube insertion technique modifies the pain response in newborns, we hypothesize that inserting an orogastric tube through the nipple of a bottle reduces pain caused by this procedure.

DESIGN

Prospective, controlled, randomized, multicentered and open label study.

SETTINGS

Three neonatal intensive care units in France (2 level 3 units and 1 level 2B).

PARTICIPANTS

Full-term or premature newborns at 32 weeks of gestation or more, postnatal age between 48 hours and 21 days, not ventilated and requiring enteral feeding, were randomized into 2 groups: usual technique (n = 36) and experimental technique (n = 35).

METHODS

Our experimental technique was to insert the orogastric tube through a modified nipple of a bottle. This method was compared with the usual technique of inserting the tube directly into the newborn's mouth without a support to guide it accompanied by a nipple encouraging sucking with a nonnutritive solution. An association of nonnutritive sucking and orally administered 30% glucose was given to all children for analgesic purposes. Pain during the orogastric tube insertion was assessed on video recordings by 2 independent experts, using a heteroassessment behavioral scale for pain (DAN-Douleur Aiguë du Nouveau-né; APN-Acute Pain in Newborns). The primary outcome was an Acute Pain in Newborns score of less than 3 at the time of the procedure. Comparisons were made using Fisher exact test or Mann-Whitney U test. Factors associated with an Acute Pain in Newborns score of 3 and greater were explored using univariable and multivariable regression models.

RESULTS

All but 1 video recording in each group were analyzed. Among the 34 neonates in the experimental group, 71.4% (95% CI: [53.7-85.4]) had an Acute Pain in Newborns score of less than 3 during orogastric tube insertion versus 41% (95% CI: [27.9-61.9]) in the control group (P = .031). Gagging was frequent and nonsignificantly different between the 2 groups (69% in the control group, 51% in the experimental group, P = .13). In multivariable analysis, the experimental technique was an independent factor of pain prevention compared with the usual technique (odds ratio = 0.21 [0.06-0.71], P = .015).

CONCLUSIONS

This study suggests that a simple, inexpensive, and feasible technique of orogastric tube insertion through the nipple of a bottle limits pain associated with this procedure in newborns.

Challenges in management of refractory pain and sedation in infants

The survival of preterm infants continues to improve, along with an increased in neonatal intensive care unit (NICU) management of chronic infants who are medically complex infants who have prolonged hospital stays, sometimes up until 2 years of age. Despite advances in neonatal and infant care, the management of pain and sedation in chronic NICU patients continues to be a challenge. Challenges such as development of appropriate pain, sedation, and withdrawal scales along with unfamiliarity of the NICU care team with pediatric disease states and pharmacotherapy complicate management of these patients. Opioid induced hyperalgesia (OIH) and delirium may play a large role in these refractory cases, yet are often not considered in the NICU population. Drug therapy interventions such as gabapentin, ketamine, risperidone, and others have limited data for safety and efficacy in this population. This article summarizes the available literature regarding the evidence for diagnosis and management of infants with refractory pain and sedation along with the challenges that clinicians face when managing these patients.

[Towards an ideal environment in neonatology]

The establishment of sensory systems occurs gradually along a transnatal continuum. During premature birth, hospitalization in neonatology, through its atypical sensory stimulations, can disrupt the development of the baby's still immature brain. To promote harmonious development in children, caregivers and parents must learn to take into account their sensory expectations in order to create the most suitable environment possible for their development.

Consciousness in the cradle: on the emergence of infant experience

Although each of us was once a baby, infant consciousness remains mysterious and there is no received view about when, and in what form, consciousness first emerges. Some theorists defend a 'late-onset' view, suggesting that consciousness requires cognitive capacities which are unlikely to be in place before the child's first birthday at the very earliest. Other theorists defend an 'early-onset' account, suggesting that consciousness is likely to be in place at birth (or shortly after) and may even arise during the third trimester. Progress in this field has been difficult, not just because of the challenges associated with procuring the relevant behavioral and neural data, but also because of uncertainty about how best to study consciousness in the absence of the capacity for verbal report or intentional behavior. This review examines both the empirical and methodological progress in this field, arguing that recent research points in favor of early-onset accounts of the emergence of consciousness.

Towards a central origin of nociceptive hypersensitivity in adult rats after a neonatal maternal separation

Early life adversities influence a nervous system still in development with long-term consequences for later life. These include nociceptive circuit alterations critical to shape an adaptive pain response to protect the organism from potential damage. Adult rats with a history of neonatal maternal separation (NMS) display visceral and somatic nociceptive hypersensitivity and inefficient analgesic responses to stress. In this study, we have characterized the consequences of NMS on wide dynamic range neurons (WDR) in the spinal cord of anaesthetized adult rats during the nociceptive processing of hot and cold noxious information. We found that WDR neurons of NMS rats display an excessive coding of mechanical and thermal information applied at the rat's hindpaws. This nicely explains the hypernociceptive behaviours seen after noxious mechanical, cold and hot peripheral stimulation. A peripheral change in the expression of molecular transducers for these stimuli (i.e., TRPV1, TRPM8 and TRPA1) does not seem to account for this general hyperexcitability. Instead, a decreased chloride-mediated inhibitory tone on WDR neurons may play a role as indicated by the abnormal elevation of the type 1 Na-K-Cl cotransporter transcripts. Altogether, we propose that long-term consequences of NMS are associated with reduced spinal cord inhibition favouring the expression of pain hypersensitivity. We cannot exclude that this phenomenon is also present at supraspinal sites, as other NMS-associated symptoms include excessive anxiety and impaired sociability.

Procedural pain assessment in neonates at risk of neonatal opioid withdrawal syndrome: a scoping review protocol

OBJECTIVE

The objective of this review is to identify evidence on pain assessment during acute procedures in hospitalized neonates at risk of neonatal opioid withdrawal syndrome (NOWS).

INTRODUCTION

While all neonates are routinely exposed to various painful procedures, neonates at risk of NOWS have longer hospital stays and are exposed to multiple painful procedures. NOWS occurs when a neonate is born to a birth parent who identifies as having sustained opioid use (such as morphine or methadone) during pregnancy. Accurate pain assessment and management during painful procedures is critical for minimizing the well-documented adverse effects of unmanaged pain in neonates. While pain indicators and composite pain scores are valid and reliable for healthy neonates, there is no review of evidence regarding procedural pain assessment in neonates at risk of NOWS.

INCLUSION CRITERIA

Eligible studies will include those reporting on hospitalized pre-term and full-term neonates at risk of NOWS having pain assessments (ie, behavioral indicators, physiological indicators, validated composite pain scores) during and/or after exposure to an acute painful procedure.

METHODS

This review will follow the JBI scoping review methodology. Databases to be searched will include MEDLINE (Ovid), CINAHL (EBSCO), Embase, PsyclNFO (EBSCO), and Scopus. The relevant data will be extracted by 2 reviewers using a modified JBI extraction tool. The results will be summarized in narrative and tabular format, including the components of participants, concept, and context (PCC).

REVIEW REGISTRATION

Open Science Framework https://osf.io/fka8s .

Validity and Reliability of Pain and Behavioral Scales for Preterm Infants: A Systematic Review

OBJECTIVE

To systematically review the instruments used to assess behavior, stress, and/or pain in preterm newborns in the neonatal intensive care unit (NICU) and verify the validity and reliability of these instruments.

DATA SOURCES

Electronic searches were conducted in PubMed/MEDLINE, Cochrane Library, Web of Science, Scientific Electronic Library Online (SciELO), Latin American and Caribbean Literature on Health Sciences (LILACS), and EBSCOhost Research Platform. 12,295 records were found.

REVIEW/ANALYSIS METHODS

37 studies met the inclusion and exclusion criteria.  The COnsensus-based Standards for selecting health Measurement INstruments (COSMIN) checklist was used to assess the quality assessment and measurement properties.

RESULTS

We identified 25 scales that assessed behavior, pain, and/or stress in preterm newborns. The Behavioral Indicators of Infant Pain (BIPP), Crying, Requires Oxygen, Increased Vital Signs, Expression, Sleeplessness (CRIES), Premature Infant Pain Profile (PIPP), and Premature Infant Pain Profile-Revised (PIPP-R) had scored "very good" in quality data. The PIPP and PIPP-R scales received the "very good" classification in validity assessment. The Evaluation Enfant Douleur (EVENDOL), Children's and Infants Postoperative Pain Scale (CHIPPS), PIPP-R, Neonatal Pain Agitation and Sedation Scale (N-PASS), Bernese Pain Scale for Neonates (BPSN), Faceless Acute Neonatal Pain Scale (FANS), BIIP, and Pain Assessment Scale for Preterm Infants (PASPI) obtained an assessment classified as excellent on reliability, both for inter-rater reliability and internal consistency, and the BPSN demonstrated a very strong value to intra-rater reliability.

CONCLUSIONS

Considering the assessments of inter-rater reliability, internal consistency, and quality of scales by COSMIN, the BIPP, and PIPP-R, were the scales considered appropriate.

Pharmacological pain and sedation interventions for the prevention of intraventricular hemorrhage in preterm infants on assisted ventilation - an overview of systematic reviews

BACKGROUND

Germinal matrix hemorrhage and intraventricular hemorrhage (GMH-IVH) may contribute to neonatal morbidity and mortality and result in long-term neurodevelopmental sequelae. Appropriate pain and sedation management in ventilated preterm infants may decrease the risk of GMH-IVH; however, it might be associated with harms.

OBJECTIVES

To summarize the evidence from systematic reviews regarding the effects and safety of pharmacological interventions related to pain and sedation management in order to prevent GMH-IVH in ventilated preterm infants.

METHODS

We searched the Cochrane Library August 2022 for reviews on pharmacological interventions for pain and sedation management to prevent GMH-IVH in ventilated preterm infants (< 37 weeks' gestation). We included Cochrane Reviews assessing the following interventions administered within the first week of life: benzodiazepines, paracetamol, opioids, ibuprofen, anesthetics, barbiturates, and antiadrenergics. Primary outcomes were any GMH-IVH (aGMH-IVH), severe IVH (sIVH), all-cause neonatal death (ACND), and major neurodevelopmental disability (MND). We assessed the methodological quality of included reviews using the AMSTAR-2 tool. We used GRADE to assess the certainty of evidence.

MAIN RESULTS

We included seven Cochrane Reviews and one Cochrane Review protocol. The reviews on clonidine and paracetamol did not include randomized controlled trials (RCTs) matching our inclusion criteria. We included 40 RCTs (3791 infants) from reviews on paracetamol for patent ductus arteriosus (3), midazolam (3), phenobarbital (9), opioids (20), and ibuprofen (5). The quality of the included reviews was high. The certainty of the evidence was moderate to very low, because of serious imprecision and study limitations. Germinal matrix hemorrhage-intraventricular hemorrhage (any grade) Compared to placebo or no intervention, the evidence is very uncertain about the effects of paracetamol on aGMH-IVH (risk ratio (RR) 0.89, 95% confidence interval (CI) 0.38 to 2.07; 2 RCTs, 82 infants; very low-certainty evidence); midazolam may result in little to no difference in the incidence of aGMH-IVH (RR 1.68, 95% CI 0.87 to 3.24; 3 RCTs, 122 infants; low-certainty evidence); the evidence is very uncertain about the effect of phenobarbital on aGMH-IVH (RR 0.99, 95% CI 0.83 to 1.19; 9 RCTs, 732 infants; very low-certainty evidence); opioids may result in little to no difference in aGMH-IVH (RR 0.85, 95% CI 0.65 to 1.12; 7 RCTs, 469 infants; low-certainty evidence); ibuprofen likely results in little to no difference in aGMH-IVH (RR 0.99, 95% CI 0.81 to 1.21; 4 RCTs, 759 infants; moderate-certainty evidence). Compared to ibuprofen, the evidence is very uncertain about the effects of paracetamol on aGMH-IVH (RR 1.17, 95% CI 0.31 to 4.34; 1 RCT, 30 infants; very low-certainty evidence). Compared to midazolam, morphine may result in a reduction in aGMH-IVH (RR 0.28, 95% CI 0.09 to 0.87; 1 RCT, 46 infants; low-certainty evidence). Compared to diamorphine, the evidence is very uncertain about the effect of morphine on aGMH-IVH (RR 0.65, 95% CI 0.40 to 1.07; 1 RCT, 88 infants; very low-certainty evidence). Severe intraventricular hemorrhage (grade 3 to 4) Compared to placebo or no intervention, the evidence is very uncertain about the effect of paracetamol on sIVH (RR 1.80, 95% CI 0.43 to 7.49; 2 RCTs, 82 infants; very low-certainty evidence) and of phenobarbital (grade 3 to 4) (RR 0.91, 95% CI 0.66 to 1.25; 9 RCTs, 732 infants; very low-certainty evidence); opioids may result in little to no difference in sIVH (grade 3 to 4) (RR 0.98, 95% CI 0.71 to 1.34; 6 RCTs, 1299 infants; low-certainty evidence); ibuprofen may result in little to no difference in sIVH (grade 3 to 4) (RR 0.82, 95% CI 0.54 to 1.26; 4 RCTs, 747 infants; low-certainty evidence). No studies on midazolam reported this outcome. Compared to ibuprofen, the evidence is very uncertain about the effects of paracetamol on sIVH (RR 2.65, 95% CI 0.12 to 60.21; 1 RCT, 30 infants; very low-certainty evidence). Compared to midazolam, the evidence is very uncertain about the effect of morphine on sIVH (grade 3 to 4) (RR 0.08, 95% CI 0.00 to 1.43; 1 RCT, 46 infants; very low-certainty evidence). Compared to fentanyl, the evidence is very uncertain about the effect of morphine on sIVH (grade 3 to 4) (RR 0.59, 95% CI 0.18 to 1.95; 1 RCT, 163 infants; very low-certainty evidence). All-cause neonatal death Compared to placebo or no intervention, the evidence is very uncertain about the effect of phenobarbital on ACND (RR 0.94, 95% CI 0.51 to 1.72; 3 RCTs, 203 infants; very low-certainty evidence); opioids likely result in little to no difference in ACND (RR 1.12, 95% CI 0.80 to 1.55; 5 RCTs, 1189 infants; moderate-certainty evidence); the evidence is very uncertain about the effect of ibuprofen on ACND (RR 1.00, 95% CI 0.38 to 2.64; 2 RCTs, 112 infants; very low-certainty evidence). Compared to midazolam, the evidence is very uncertain about the effect of morphine on ACND (RR 0.31, 95% CI 0.01 to 7.16; 1 RCT, 46 infants; very low-certainty evidence). Compared to diamorphine, the evidence is very uncertain about the effect of morphine on ACND (RR 1.17, 95% CI 0.43 to 3.19; 1 RCT, 88 infants; very low-certainty evidence). Major neurodevelopmental disability Compared to placebo, the evidence is very uncertain about the effect of opioids on MND at 18 to 24 months (RR 2.00, 95% CI 0.39 to 10.29; 1 RCT, 78 infants; very low-certainty evidence) and at five to six years (RR 1.6, 95% CI 0.56 to 4.56; 1 RCT, 95 infants; very low-certainty evidence). No studies on other drugs reported this outcome.

AUTHORS' CONCLUSIONS

None of the reported studies had an impact on aGMH-IVH, sIVH, ACND, or MND. The certainty of the evidence ranged from moderate to very low. Large RCTs of rigorous methodology are needed to achieve an optimal information size to assess the effects of pharmacological interventions for pain and sedation management for the prevention of GMH-IVH and mortality in preterm infants. Studies might compare interventions against either placebo or other drugs. Reporting of the outcome data should include the assessment of GMH-IVH and long-term neurodevelopment.

Variability of neonatal premedication practices for endotracheal intubation and LISA in the UK (NeoPRINT survey)

OBJECTIVE

The NeoPRINT Survey was designed to assess premedication practices throughout UK NHS Trusts for both neonatal endotracheal intubation and less invasive surfactant administration (LISA).

DESIGN

An online survey consisting of multiple choice and open answer questions covering preferences of premedication for endotracheal intubation and LISA was distributed over a 67-day period. Responses were then analysed using STATA IC 16.0.

SETTING

Online survey distributed to all UK Neonatal Units (NNUs).

PARTICIPANTS

The survey evaluated premedication practices for endotracheal intubation and LISA in neonates requiring these procedures.

MAIN OUTCOME MEASURES

The use of different premedication categories as well as individual medications within each category was analysed to create a picture of typical clinical practice across the UK.

RESULTS

The response rate for the survey was 40.8 % (78/191). Premedication was used in all hospitals for endotracheal intubation but overall, 50 % (39/78) of the units that have responded, use premedications for LISA. Individual clinician preference had an impact on premedication practices within each NNU.

CONCLUSION

The wide variability on first-line premedication for endotracheal intubation noted in this survey could be overcome using best available evidence through consensus guidance driven by organisations such as British Association of Perinatal |Medicine (BAPM). Secondly, the divisive view around LISA premedication practices noted in this survey requires an answer through a randomised controlled trial.

The physiology, assessment, and treatment of neonatal pain

Studies have clearly shown that development of pain receptors starts as early as 20-weeks' gestation. Despite contrary belief, the human fetus develops a similar number of receptive pain fibers as seen in adults. These receptors' maturation is based on response to sensory stimuli received after birth which makes the NICU a critical place for developing central nervous system's pain perception. In practice, the assessment of pain relies mostly on bedside staff. In this review we will discuss the various developing features of pain pathways in the neonatal brain and the modification of pain perception secondary to various interactions immediately after birth. We also discuss the various tools utilized in the NICU for pain assessment that rely on physiological and behavioral patterns. Finally, we address the management of pain in the NICU by either pharmacological or non-pharmacological intervention while highlighting potential benefits, disadvantages, and situations where one may be preferred over another.

Non-pharmacological management of infant and young child procedural pain

BACKGROUND

Despite evidence of the long-term implications of unrelieved pain during infancy, it is evident that infant pain is still under-managed and unmanaged. Inadequately managed pain in infancy, a period of exponential development, can have implications across the lifespan. Therefore, a comprehensive and systematic review of pain management strategies is integral to appropriate infant pain management. This is an update of a previously published review update in the Cochrane Database of Systematic Reviews (2015, Issue 12) of the same title.

OBJECTIVES

To assess the efficacy and adverse events of non-pharmacological interventions for infant and child (aged up to three years) acute pain, excluding kangaroo care, sucrose, breastfeeding/breast milk, and music.

SEARCH METHODS

For this update, we searched CENTRAL, MEDLINE-Ovid platform, EMBASE-OVID platform, PsycINFO-OVID platform, CINAHL-EBSCO platform and trial registration websites (ClinicalTrials.gov; International Clinical Trials Registry Platform) (March 2015 to October 2020). An update search was completed in July 2022, but studies identified at this point were added to 'Awaiting classification' for a future update.  We also searched reference lists and contacted researchers via electronic list-serves.  We incorporated 76 new studies into the review.  SELECTION CRITERIA: Participants included infants from birth to three years in randomised controlled trials (RCTs) or cross-over RCTs that had a no-treatment control comparison. Studies were eligible for inclusion in the analysis if they compared a non-pharmacological pain management strategy to a no-treatment control group (15 different strategies). In addition, we also analysed studies when the unique effect of adding a non-pharmacological pain management strategy onto another pain management strategy could be assessed (i.e. additive effects on a sweet solution, non-nutritive sucking, or swaddling) (three strategies). The eligible control groups for these additive studies were sweet solution only, non-nutritive sucking only, or swaddling only, respectively. Finally, we qualitatively described six interventions that met the eligibility criteria for inclusion in the review, but not in the analysis.  DATA COLLECTION AND ANALYSIS: The outcomes assessed in the review were pain response (reactivity and regulation) and adverse events. The level of certainty in the evidence and risk of bias were based on the Cochrane risk of bias tool and the GRADE approach. We analysed the standardised mean difference (SMD) using the generic inverse variance method to determine effect sizes.  MAIN RESULTS: We included total of 138 studies (11,058 participants), which includes an additional 76 new studies for this update. Of these 138 studies, we analysed 115 (9048 participants) and described 23 (2010 participants) qualitatively. We described qualitatively studies that could not be meta-analysed due to being the only studies in their category or statistical reporting issues. We report the results of the 138 included studies here. An SMD effect size of 0.2 represents a small effect, 0.5 a moderate effect, and 0.8 a large effect. The thresholds for the I2 interpretation were established as follows: not important (0% to 40%); moderate heterogeneity (30% to 60%); substantial heterogeneity (50% to 90%); considerable heterogeneity (75% to 100%). The most commonly studied acute procedures were heel sticks (63 studies) and needlestick procedures for the purposes of vaccines/vitamins (35 studies). We judged most studies to have high risk of bias (103 out of 138), with the most common methodological concerns relating to blinding of personnel and outcome assessors. Pain responses were examined during two separate pain phases: pain reactivity (within the first 30 seconds after the acutely painful stimulus) and immediate pain regulation (after the first 30 seconds following the acutely painful stimulus). We report below the strategies with the strongest evidence base for each age group. In preterm born neonates, non-nutritive sucking may reduce pain reactivity (SMD -0.57, 95% confidence interval (CI) -1.03 to -0.11, moderate effect; I2 = 93%, considerable heterogeneity) and improve immediate pain regulation (SMD -0.61, 95% CI -0.95 to -0.27, moderate effect; I2 = 81%, considerable heterogeneity), based on very low-certainty evidence. Facilitated tucking may also reduce pain reactivity (SMD -1.01, 95% CI -1.44 to -0.58, large effect; I2 = 93%, considerable heterogeneity) and improve immediate pain regulation (SMD -0.59, 95% CI -0.92 to -0.26, moderate effect; I2 = 87%, considerable heterogeneity); however, this is also based on very low-certainty evidence. While swaddling likely does not reduce pain reactivity in preterm neonates (SMD -0.60, 95% CI -1.23 to 0.04, no effect; I2 = 91%, considerable heterogeneity), it has been shown to possibly improve immediate pain regulation (SMD -1.21, 95% CI -2.05 to -0.38, large effect; I2 = 89%, considerable heterogeneity), based on very low-certainty evidence. In full-term born neonates, non-nutritive sucking may reduce pain reactivity (SMD -1.13, 95% CI -1.57 to -0.68, large effect; I2 = 82%, considerable heterogeneity) and improve immediate pain regulation (SMD -1.49, 95% CI -2.20 to -0.78, large effect; I2 = 92%, considerable heterogeneity), based on very low-certainty evidence.  In full-term born older infants, structured parent involvement was the intervention most studied. Results showed that this intervention has little to no effect in reducing pain reactivity (SMD -0.18, 95% CI -0.40 to 0.03, no effect; I2 = 46%, moderate heterogeneity) or improving immediate pain regulation (SMD -0.09, 95% CI -0.40 to 0.21, no effect; I2 = 74%, substantial heterogeneity), based on low- to moderate-certainty evidence. Of these five interventions most studied, only two studies observed adverse events, specifically vomiting (one preterm neonate) and desaturation (one full-term neonate hospitalised in the NICU) following the non-nutritive sucking intervention. The presence of considerable heterogeneity limited our confidence in the findings for certain analyses, as did the preponderance of evidence of very low to low certainty based on GRADE judgements.

AUTHORS' CONCLUSIONS

Overall, non-nutritive sucking, facilitated tucking, and swaddling may reduce pain behaviours in preterm born neonates. Non-nutritive sucking may also reduce pain behaviours in full-term neonates. No interventions based on a substantial body of evidence showed promise in reducing pain behaviours in older infants. Most analyses were based on very low- or low-certainty grades of evidence and none were based on high-certainty evidence. Therefore, the lack of confidence in the evidence would require further research before we could draw a definitive conclusion.

Understanding the concurrent and predictive relations between child-led emotion regulation behaviors and pain during vaccination in toddlerhood

ABSTRACT

The purpose of this study was to further our understanding of early childhood pain-related distress regulation. Concurrent and predictive relations between child-led emotion regulation (ER) behaviors and pain-related distress during vaccination were examined at 2 different ages using autoregressive cross-lagged path analyses. Toddlers were video-recorded at the 12- and 18-month routine vaccination appointments (12-month-old [N = 163]; 18-month-old [N = 149]). At 1, 2, and 3 minutes postneedle, videos were coded for 3 clusters of child-led ER behaviors (disengagement of attention, parent-focused behaviors, and physical self-soothing) and pain-related distress. The concurrent and predictive relations between child-led ER behaviors and pain-related distress behaviors were assessed using 6 models (3 emotion regulation behaviors by 2 ages). At 18 months, disengagement of attention was significantly negatively related to pain-related distress at 1 minute postneedle, and pain-related distress at 1 minute postneedle was significantly related to less disengagement of attention at 2 minutes postneedle. Parent-focused behaviors had significant positive relations with pain-related distress at both ages, with stronger magnitudes at 18 months. Physical self-soothing was significantly related to less pain-related distress at both ages. Taken together, these findings suggest that disengagement of attention and physical self-soothing may serve more of a regulatory function during toddlerhood, whereas parent-focused behaviors may serve more of a function of gaining parent support for regulation. This study is the first to assess these relations during routine vaccination in toddlerhood and suggests that toddlers in the second year of life are beginning to play a bigger role in their own regulation from painful procedures than earlier in infancy.

Healthcare Professionals’ Knowledge about Pediatric Chronic Pain: A Systematic Review

Pediatric chronic pain is a common public health problem with a high prevalence among children and adolescents. The aim of this study was to review the current knowledge of health professionals on pediatric chronic pain between 15–30% among children and adolescents. However, since this is an underdiagnosed condition, it is inadequately treated by health professionals. To this aim, a systematic review was carried out based on a search of the electronic literature databases (PubMed and Web of Science), resulting in 14 articles that met the inclusion criteria. The analysis of these articles seems to show a certain degree of heterogeneity in the surveyed professionals about the awareness of this concept, especially regarding its etiology, assessment, and management. In addition, the extent of knowledge of the health professionals seems to be insufficient regarding these aspects of pediatric chronic pain. Hence, the knowledge of the health professionals is unrelated to recent research that identifies central hyperexcitability as the primary factor affecting the onset, persistence, and management of pediatric chronic pain.

Analgesia and sedation for intratracheal intubation in the neonatal period: an integrative literature review

OBJECTIVE

to assess evidence available in the literature about the use of sedation and analgesia for intratracheal intubation of newborns.

DATA SOURCES

by means of an integrative literature review, the authors looked for evidence related to the theme from the last ten years, indexed in the Pubmed, Medline, Lilacs, Scielo, and Scopus databases, by combining the descriptors: newborn, intratracheal intubation, and analgesia. Articles in Portuguese, English, and Spanish that met the research purpose were included.

DATA SUMMARY

After applying the eligibility criteria, ten articles on the topic were obtained, predominantly narrative reviews, retrospective studies, observational studies, and only one non-randomized clinical trial, which characterizes the literature related to the topic as having a low level of scientific evidence. There is still no consensus in the literature on which medications and indications are for use in non-elective intubations, despite the ethical recommendation.

DISCUSSION

pain and its deleterious effects should not be neglected. Neonatal Intensive Care Units should have their own protocols regarding sedation and analgesia for intubation considering the individual characteristics of each patient. There is an ethical recommendation regarding the use of sedation and analgesia for intubation since it is a known painful procedure.

Improving Consistency in the Use of Sucrose With Comfort Measures During Minor Painful Procedures

BACKGROUND

Inconsistent pain management practices can have negative physiologic and neurodevelopmental consequences in the neonate. Low rates of oral sucrose use with comfort measures for pain management during minor painful procedures were identified at a level III neonatal intensive care unit. Underutilization of pain management resources occurs despite the availability of evidence-based pain management interventions.

PURPOSE

To improve consistency in the use of oral sucrose solution with comfort measures during peripheral intravenous catheter insertion attempts in the neonatal intensive care unit in patients greater than or equal to 32 0/7th weeks postmenstrual age.

METHODS

Quality improvement methods were used to implement an evidence-based procedural pain algorithm for minor painful procedures and optimize pain management processes over a 15-week period in a 26-bed, level III neonatal intensive care unit.

RESULTS

There was an increase in the average percentage of documented use of sucrose with comfort measures during peripheral intravenous catheter insertion attempts from 20% to 27%. There was a 41% increase in the average presence of a sucrose order indicated for procedural pain. There were improvements in staff knowledge of sucrose dosing and perceived behavior of staff after completing the education.

IMPLICATIONS FOR PRACTICE AND RESEARCH

Procedural pain management should be used as a quality indicator and guidelines should be established with the support of key stakeholders in neonatal intensive care settings. Future projects should address barriers related to workflow and accessibility of sucrose, include other common needlestick procedures, and expand the role of parent participation in pain management practices.Video Abstract available at:https://journals.lww.com/advancesinneonatalcare/pages/video.aspx?v=60 .

Adequacy of sedation analgesia to support the comfort of neonates undergoing therapeutic hypothermia and its impact on short-term neonatal outcomes

Objectives

We aimed to evaluate (1) whether sedation analgesia (SA) used during therapeutic hypothermia (TH) was efficient to support the wellbeing of neonates with hypoxic-ischemic encephalopathy, (2) the SA level and its adjustment to clinical pain scores, and (3) the impact of inadequate SA on short-term neonatal outcomes evaluated at discharge.

Methods

This was an observational retrospective study performed between 2011 and 2018 in two level III centers in Alsace, France. We analyzed the wellbeing of infants by using the COMFORT-Behavior (COMFORT-B) clinical score and SA level during TH, according to which we classified infants into four groups: those with excess SA, adequate SA, lack of SA, and variability of SA. We analyzed the variations in doses of SA and their justification. We also determined the impact of inadequate SA on neonatal outcomes at discharge by multivariate analyses with multinomial regression, with adequate SA as the reference.

Results

A total of 110 patients were included, 89 from Strasbourg university hospital and 21 from Mulhouse hospital. The COMFORT-B score was assessed 95.5% of the time. Lack of SA was mainly found on the first day of TH (15/110, 14%). In all, 62 of 110 (57%) infants were in excess of SA over the entire duration of TH. Most dose variations were related to clinical pain scores. Inadequate SA was associated with negative short-term consequences. Infants with excess of SA had a longer duration of mechanical ventilation [mean ratio 1.46, 95% confidence interval (CI), 1.13-1.89, p = 0.005] and higher incidence of abnormal neurological examination at discharge (odds ratio 2.61, 95% CI, 1.10-6.18, p = 0.029) than infants with adequate SA.

Discussion

Adequate SA was not easy to achieve during TH. Close and regular monitoring of SA level may help achieve adequate SA. Excess of SA can be harmful for newborns with hypoxic-ischemic encephalopathy who are undergoing TH.

How Much Do Parents Know About Pain in Their Children?

OBJECTIVES

Adequate pain control is essential to the comprehensive management of pediatric patients within the emergency department.The aim of this study is to evaluate parents' knowledge about pain in the pediatric population patient and secondarily describe erroneous concepts that can affect a correct children's pain management.

METHODS

A single-center descriptive study of cross-sectional surveys was performed between October and December 2018, with a previously validated ad hoc and anonymous questionnaire consisting of 9 items. All parents/guardians participating in the study had a child aged 0 to 18 years who had been admitted to the emergency department.

RESULTS

Sixty-nine percent (n = 315) were women, 49.9% (n = 226) had university degrees and only 11% (n = 50) had professions related to the healthcare system. A linear association was observed between the number of correct answers and the level of education (β = 1.04; 95% confidence interval, 0.76-1.32; P < 0.001), as well as between parents with professions related to the healthcare system compared with other professions (61.4% vs 51.2% with P = 0.005). The responses of Spanish parents offered better results than answers obtained from parents from the American continent (56.4% vs 41.4% with P < 0.001). No differences were observed between parents of children with chronic diseases.

CONCLUSIONS

In our study, we observed that a considerable percentage of parents hold misconceptions about how children express pain, and therefore, it would be necessary to encourage formation programs for parents to help identify, evaluate, and correctly treat pain in their children.

The fetal pain paradox

Controversy exists as to when conscious pain perception in the fetus may begin. According to the hypothesis of cortical necessity, thalamocortical connections, which do not form until after 24-28 weeks gestation, are necessary for conscious pain perception. However, anesthesiologists and neonatologists treat age-matched neonates as both conscious and pain-capable due to observable and measurable behavioral, hormonal, and physiologic indicators of pain. In preterm infants, these multimodal indicators of pain are uncontroversial, and their presence, despite occurring prior to functional thalamocortical connections, has guided the use of analgesics in neonatology and fetal surgery for decades. However, some medical groups state that below 24 weeks gestation, there is no pain capacity. Thus, a paradox exists in the disparate acknowledgment of pain capability in overlapping patient populations. Brain networks vary by age. During the first and second trimesters, the cortical subplate, a unique structure that is present only during fetal and early neonatal development, forms the first cortical network. In the third trimester, the cortical plate assumes this function. According to the subplate modulation hypothesis, a network of connections to the subplate and subcortical structures is sufficient to facilitate conscious pain perception in the fetus and the preterm neonate prior to 24 weeks gestation. Therefore, similar to other fetal and neonatal systems that have a transitional phase (i.e., circulatory system), there is now strong evidence for transitional developmental phases of fetal and neonatal pain circuitry.

Utilization of neonatal sedation and anesthesia: an SPR survey

BACKGROUND

There is little data regarding the use of sedation and anesthesia for neonatal imaging, with practice patterns varying widely across institutions.

OBJECTIVE

To understand the current utilization of sedation and anesthesia for neonatal imaging, and review the current literature and recommendations.

MATERIALS AND METHODS

One thousand, two hundred twenty-six questionnaire invitations were emailed to North American physician members of the Society for Pediatric Radiology using the Survey Monkey platform. Descriptive statistical analysis of the responses was performed.

RESULTS

The final results represented 59 institutions from 26 U.S. states, the District of Columbia and three Canadian provinces. Discrepant responses from institutions with multiple respondents (13 out of 59 institutions) were prevalent in multiple categories. Of the 80 total respondents, slightly more than half (56%) were associated with children's hospitals and 44% with the pediatric division of an adult radiology department. Most radiologists (70%) were cognizant of the neonatal sedation policies in their departments. A majority (89%) acknowledged awareness of neurotoxicity concerns in the literature and agreed with the validity of these concerns. In neonates undergoing magnetic resonance imaging (MRI), 46% of respondents reported attempting feed and bundle in all patients and an additional 46% attempt on a case-by-case basis, with most (35%) using a single swaddling attempt before sedation. Sedation was most often used for neonatal interventional procedures (93%) followed by MR (85%), nuclear medicine (48%) and computed tomography (31%). More than half of respondents (63%) reported an average success rate of greater than 50% when using neonatal sedation for MR.

CONCLUSION

Current practice patterns, policies and understanding of the use of sedation and anesthesia for neonatal imaging vary widely across institutions in North America, and even among radiologists from the same institution. Our survey highlights the need for improved awareness, education, and standardization at both the institutional level and the societal level. Awareness of the potential for anesthetic neurotoxicity and success of non-pharmacologic approaches to neonatal imaging is crucial, along with education of health care personnel, systematic approaches to quality control and improvement, and integration of evidence-based protocols into clinical practice.

Parasympathetic evaluation for procedural pain assessment in neonatology

INTRODUCTION

The Newborn Infant Parasympathetic Evaluation (NIPE) index is an instrument that enables continuous, fast and objective assessment of neonatal discomfort. The aim of the study was to analyse changes in NIPE values after performance of blood draws and the factors involved in this variation.

MATERIAL AND METHODS

We conducted a prospective observational study. We included infants admitted to the neonatal intensive care unit between June and December 2021 who underwent blood draws. We recorded demographic data, aspects related to the procedure, the NIPE index and the heart rate at baseline and 1, 2, 3, 4, 5, 10 and 15 min after the procedure.

RESULTS

The study included 86 records for 49 patients. In the first 4 min after the procedure, there was a significant decrease in the NIPE index, with a maximum decrease of 22.8% relative to baseline and the nadir at 2.79 min. The decrease in NIPE values was greater in infants born preterm, male, with lower 5-min Apgar scores and following procedures that had been performed previously, after caesarean section or in the morning. There were no differences when the blood draw was obtained during kangaroo care. The correlation between the NIPE index and the heart rate was weak.

CONCLUSIONS

After a painful procedure, such as a blood draw, the NIPE monitor showed a significant decrease in the first 4 min, which was more pronounced in preterm infants, in repeated procedures or after caesarean delivery. The NIPE index could help identify infants experiencing acute procedural pain, complementing clinical rating scales.

Effect of kangaroo mother care on pain during orogastric tube insertion in low-birthweight newborns: An open label, randomised trial

AIM

Non-pharmacological methods are commonly used to reduce the procedural pain in newborns. In this open label, randomised control trial, we studied the pain-reducing effect of kangaroo mother care (KMC) during orogastric tube insertion.

METHODS

Newborns, with birthweight 1500-2499 g and admitted to nursery, were randomised into control (no-KMC) or intervention (KMC) arms. In intervention arm, KMC was given for 60 min before and after the procedure. Premature Infant Pain Profile-Revised (PIPP-R) score was used to assess the pain response and the pain severity was graded as minimal or no pain (≤6), mild-to-moderate (7-12) and severe (>12). The PIPP-R scoring was done before, during and at 3- and 15-min after procedure. Change in PIPP-R scores from baseline was calculated.

RESULTS

Newborns included in no-KMC (n = 40) or KMC (n = 40) arms were comparable for major confounders (P > 0.05). Pre-procedural pain scores were comparable (P = 0.72). Pain scores measured during and after procedure were significantly higher in no-KMC group than KMC arm. The KMC reduced the pain score by 39%, 32% and 30% during and at 3- and 15-min after procedure respectively as compared to control (P < 0.01). The increase in PIPP-R score from pre-procedural level was 40%, 35% and 31% lower in KMC than no-KMC arm (P < 0.01). A greater proportion of newborns had significantly less severe grades of pain in the intervention arm compared to the no-KMC arm (P < 0.01).

CONCLUSION

Orogastric tube placement is a painful procedure. KMC significantly reduces periprocedural pain and its effect continues for at least 15 min after the procedure.

Neurodevelopmental outcomes after neonatal surgery

Children who require surgery in the newborn period are at risk for long-term neurodevelopmental impairment (NDI). There is growing evidence that surgery during this critical window of neurodevelopment gives rise to an increased risk of brain injury, predisposing to neurodevelopmental challenges including motor delays, learning disabilities, executive function impairments, and behavioral disorders. These impairments can have a significant impact on the quality of life of these children and their families. This review explores the current literature surrounding the effect of neonatal surgery on neurodevelopment, as well as the spectrum of proposed mechanisms that may impact neurodevelopmental outcomes. The goal is to identify modifiable risk factors and patients who may benefit from close neurodevelopmental follow-up and early referral to therapy.

Evaluation and Treatment of Pain in Fetuses, Neonates and Children

The perception of pain is individual and differs between children and adults. The structures required to feel pain are developed at 24 weeks of gestation. However, pain assessment is complicated, especially in neonates, infants and preschool-age children. Clinical scales adapted to age are the most used methods for assessing and monitoring the degree of pain in children. They evaluate several behavioral and/or physiological parameters related to pain. Some monitors detect the physiological changes that occur in association with painful stimuli, but they do not yet have a clear clinical use. Multimodal analgesia is recommended for pain treatment with non-pharmacological and pharmacological interventions. It is necessary to establish pharmacotherapeutic protocols for analgesia adjusted to the acute or chronic, type and intensity of pain, as well as age. The most used analgesics in children are paracetamol, ibuprofen, dipyrone, opioids (morphine and fentanyl) and local anesthetics. Patient-controlled analgesia is an adequate alternative for adolescent and older children in specific situations, such as after surgery. In patients with severe or persistent pain, it is very important to consult with specific pain services.

Cultural Adaptation and Validation of the Premature Infant Pain Profile-Revised (PIPP-R) Pain Measurement Scale: Research Protocol

INTRODUCTION

The main objective of this study is to validate the PIPP-R scale (Premature Infant Pain Profile-Revised) for measuring neonatal pain in the Spanish hospital setting.

MATERIALS AND METHODS

The original scale will be translated from English into Spanish and a consensus translation will be prepared by the research team, which will be back-translated from Spanish into English. The content validity of the Spanish version of the scale will be measured using the Delphi method. Subsequently, a multicenter observational study will be conducted to assess construct validity, internal consistency, and intra-observer and inter-observer agreement. Pain will be assessed by comparing scores for a specific non-painful procedure with those for a specific painful procedure. The sample will include 300 subjects in intensive care and intermediate care units, who will be equally distributed among the participating hospitals. The subjects will be stratified into three groups by gestational age.

DISCUSSION

The original version of the PIPP-R scale is useful for objectively assessing neonatal acute and procedural pain from a gestational age of 25 weeks and over. It is important to culturally adapt the original validated scale and to test its validity and reliability in the Spanish healthcare context. The results of this study may represent significant progress in pain management.

Efficacy and safety of non-pharmacological interventions for neonatal pain: an overview of systematic reviews

OBJECTIVES

To synthesise current evidence from systematic reviews (SRs) regarding the efficacy and safety of non-pharmacological interventions to prevent and treat pain in newborn infants.

DESIGN

Overview of SRs.

DATA SOURCES

We searched PubMed, Embase, Cochrane Library, Web of Science, CINAHL, Chinese National Knowledge Infrastructure (CNKI), Chinese Biomedical Literature Database (CBM), Wanfang Database, Chinese Science and Technology Periodical Database (VIP) and Google Scholar to identify all relevant SRs published in the last 5 years.

ELIGIBILITY CRITERIA FOR SELECTING STUDIES

We included SRs that evaluated the efficacy and safety of non-pharmacological interventions for neonatal pain.

DATA EXTRACTION AND SYNTHESIS

Two reviewers independently extracted the data, assessed the methodological quality using a Measurement Tool to Assess Systematic Reviews (AMSTAR) 2 and graded the evidence quality with the Grading of Recommendations Assessment, Development and Evaluation (GRADE).

RESULTS

A total of 29 SRs were included in this overview, of which 28 focused on procedural pain and only 1 focused on postoperative pain. Based on AMSTAR 2, seven reviews were found to be of 'high quality', eight of 'moderate quality', five of 'low quality' and nine of 'critically low quality'. The GRADE results suggested that facilitated tucking, kangaroo care, sweet solutions, familiar odour or combined non-pharmacological interventions, such as a combination of sucrose and non-nutritive sucking, were effective and safe in reducing pain from medical procedures in neonates. However, sucrose alone was less effective than local anaesthesia or a combination of the two during circumcision.

CONCLUSIONS

Facilitated tucking, small volumes of sweet solutions, kangaroo care and familiar odour were recommended. Scientific implementation strategies should be developed to promote the clinical use of these effective non-pharmacological interventions. Meanwhile, further rigorous trials and SRs are needed to identify the best non-pharmacological approaches for pain from common surgery and illnesses in neonates.

PROSPERO REGISTRATION NUMBER

CRD42021292583.

Neonatal Morphine Results in Long-Lasting Alterations to the Gut Microbiome in Adolescence and Adulthood in a Murine Model

Despite the many advancements in the field of pain management, the use of intravenous opioids, such as morphine, in neonates is still a challenge for clinicians and researchers, as the available evidence concerning the long-term consequences of such an early exposure is limited. In particular, little is known concerning the long-term consequences of neonatal morphine exposure on the gut microbiome, which has been identified as a key modulator of health and diseases. Consequently, the purpose of this study was to investigate those long-term consequences of neonatal morphine on the gut microbiome. Newborn mice were exposed to either morphine (5 mg/kg/day) or saline for a duration of 7 ± 2 days. Fecal samples were collected during adolescence and adulthood to longitudinally assess the gut microbiome. DNA extracted from the stool samples were sent out for 16s rRNA sequencing. During adolescence, neonatal morphine resulted in a significant increase of α-diversity and an overall decrease in the abundance of several commensal genera. During adulthood, β-diversity revealed a significantly different microbial composition of the neonatally morphine-exposed mice than that of the controls. The results demonstrate that morphine exposure during this critical developmental period resulted in long-lasting changes, particularly a reduction in several commensal bacteria. Thus, an adjunct therapeutic intervention with probiotics could potentially be used along with opioids to manage pain while attenuating the long-term co-morbidities of neonatal morphine later in life.

Frequencies, Modalities, Doses and Duration of Computerized Prescriptions for Sedative, Analgesic, Anesthetic and Paralytic Drugs in Neonates Requiring Intensive Care: A Prospective Pharmacoepidemiologic Cohort Study in 30 French NICUs From 2014 to 2020

Objectives: No consensus exists about the doses of analgesics, sedatives, anesthetics, and paralytics used in critically ill neonates. Large-scale, detailed pharmacoepidemiologic studies of prescription practices are a prerequisite to future research. This study aimed to describe the detailed prescriptions of these drug classes in neonates hospitalized in neonatal intensive care units (NICU) from computerized prescription records and to compare prescriptions by gestational age.

Materials and Methods: We included all neonates requiring intensive care in 30 French level III units from 2014 through 2020 with a computerized prescription for an analgesic, sedative, anesthetic, or paralytic agent. We described frequencies of prescription, methods of administration, concomitant drug prescriptions, and dosing regimen, and compared them across gestational ages.

Results: Among 65,555 neonates, 29,340 (44.8%) were prescribed at least one analgesic (acetaminophen in 37.2% and opioids in 17.8%), sedative (9.8%), anesthetic (8.5%), and/or paralytic agent (1%). Among preterm infants born before 28 weeks, 3,771/4,283 (88.0%) were prescribed at least one of these agents: 69.7% opioids, 41.2% sedatives, 32.5% anesthetics, and 5.8% paralytics. The most frequently prescribed agents were sufentanil (in 10.3% of neonates) and morphine (in 8.0% of neonates) for opioids, midazolam (9.3%) for sedatives, ketamine (5.7%) and propofol (3.3%) for anesthetics. In most neonates, opioids and sedatives were prescribed as continuous infusion, whereas anesthetics were prescribed as single doses. Opioids, sedatives and paralytics were mostly prescribed in association with another agent. Doses varied significantly by gestational age but within a limited range. Gestational age was inversely related to the frequency, cumulative dose and duration of prescriptions. For example, morphine prescriptions showed median (IQR) cumulative doses of 2601 (848–6750) vs. 934 (434–2679) µg/kg and median (IQR) durations of 7 (3–15) vs. 3 (2–5) days in infants born <28 vs. ≥ 37 weeks of gestation, respectively (p-value<0.001).

Conclusion: The prescriptions of analgesic, sedative, anesthetic, or paralytic agent were frequent and often combined in the NICU. Lower gestational age was associated with higher frequencies, longer durations and higher cumulative doses of these prescriptions. Dose-finding studies to determine individualized dosing regimens and studies on long-term neurodevelopmental outcome according to received cumulative doses are required.

Premedication for Nonemergent Neonatal Intubation: A Systematic Review

This systematic review evaluates research regarding the use of premedication for nonemergent neonatal intubation. Unmedicated intubation is associated with adverse outcomes such as physiologic instability and decompensation, repeat and prolonged intubation attempts, and trauma. Included studies compared medicated intervention groups against an unmedicated control. Medications vary greatly across studies and include anesthetics, opioids, benzodiazepines, barbiturates, vagolytics, and neuromuscular blockades (muscle relaxants). A comprehensive search of randomized control trials, retrospective cohort studies, and prospective observational studies was completed from the electronic databases of CINAHL EBSCOhost, Ovid MEDLINE, PubMed, EMBASE, Google Scholar, Cochrane Collaboration, and ClinicalTrials.gov and footnotes were used to complete the search. Twelve studies are included in this review dating back to 1984 and are from 5 countries. Outcome measures include changes in heart rate, oxygen saturation, and blood pressure; number and duration of attempts to intubate; and trauma to the oral cavity and upper airway. Twelve studies are included in this review and include 5410 patients. No studies were excluded based on level of evidence or quality appraisal. Findings in this review support the recommendation that opioids and vagolytic agents should be used for premedication for nonemergent neonatal intubation and adjuvant sedation and muscle relaxants should be considered.

Continuous epidural chloroprocaine after abdominal surgery is associated with lower postoperative opioid exposure in NICU infants

BACKGROUND

Epidural anesthesia in infants undergoing open abdominal surgery has the potential to reduce opioid consumption, lower pain scores, and expedite tracheal extubation. We evaluated associations between use of continuous epidural chloroprocaine and improved intra- and post-operative outcomes.

METHODS

This matched retrospective cohort study first identified 24 patients who between April 2018 through December 2019 were treated with a caudal catheter and epidural chloroprocaine infusion for a laparotomy at postnatal age of 6 months or less. A matched comparator group of 24 patients was derived based on age and type of surgery. Exclusion criteria were the presence of a preoperative opioid infusion, comorbidities that would preclude appropriate pain assessment, or a recent surgical procedure. Primary outcomes included opioid consumption and pain scores; we secondarily analyzed intraoperative anesthetic requirements, other systemic analgesic use, vital signs, tracheal extubation time, and procedural times.

RESULTS

Treatment with epidural anesthesia was associated with lower 5-day total postoperative opioid consumption (3.2 mg/kg vs. 19.7 mg/kg in the respective epidural vs. systemic groups, p = 0.001) and time to tracheal extubation (1.3 days vs. 3.2 days, p = 0.005). Any statistically significant differences in pain scores were not clinically meaningful. There were no differences in mean arterial pressure or intraoperative inhaled anesthetic doses.

CONCLUSION

Continuous infusion of epidural chloroprocaine in infants following open abdominal surgery may limit exposure to systemic opioid medications while providing adequate postoperative analgesia and shortening time to tracheal extubation.

Association between morphine exposure and impaired brain development on term-equivalent age brain magnetic resonance imaging in very preterm infants

To investigate the relationship between morphine exposure in the first week of life and brain injury on term-equivalent age magnetic resonance imaging (MRI) in very preterm infants. A retrospective study included 106 infants with a birth weight of < 1500 g who were born at King Saud Medical City at ≤ 32 gestational weeks, were admitted to the neonatal intensive care unit, and underwent term-equivalent age or pre-discharge brain MRI. A univariate analysis in addition to modified log-Poisson regression with a robust variance estimator was applied, and the effect of early morphine exposure and cumulative dose in the first seven days on brain morphology and growth at term-equivalent age was determined using the Kidokoro score. Sixty-eight (64.2%) infants had received morphine in the first week of life (median cumulative dose: 1.68 mg/kg, interquartile range 0.48-2.52 mg/kg). Early initiation of morphine administration was significantly associated with high total white matter (adjusted relative risk [aRR] 1.32, 95% confidence interval [CI] 1.01-1.72) and cerebellum (aRR 1.36, 95% CI 1.03-1.81) scores and a small cerebellar volume (aRR 1.28, 95% CI 1.02-1.61). Morphine exposure in the first week of life was independently associated with white matter and cerebellar injury on term-equivalent age brain MRI in very preterm infants.

Physical and Psychological Childbirth Experiences and Early Infant Temperament

Objective

To examine how physical and psychological childbirth experiences affect maternal perceptions and experiences of early infant behavioural style (temperament).

Background

Unnecessary interventions may disturb the normal progression of physiological childbirth and instinctive neonatal behaviours that facilitate mother-infant bonding and breastfeeding. While little is known about how a medicalised birth may influence developing infant temperament, high impact interventions which affect neonatal crying and cortisol levels could have longer term consequences for infant behaviour and functioning.

Methods

A retrospective Internet survey was designed to fully explore maternal experiences of childbirth and her postnatal perceptions of infant behaviour. Data collected from 999 mother-infant dyads were analysed using Pearson's correlations and multiple analyses of covariance, employing the Bonferroni method of correction to establish initially significant variables. Multiple linear regressions were conducted to determine major perinatal contributors to perceived early infant temperament.

Results

Multiple regression analyses on each of the eight Mother and Baby Scales outcome variables indicated that early infant behavioural style (0-6 months) was largely predicted by subjective maternal states during and post-childbirth, postnatal depression scores, maternal personality traits and infant age. For example, infant age (Beta = 0.440, p = 0.000) was the most significant predictor of Alert-Responsive infant behaviour, followed by maternal Postnatal Positive experience (Beta = 0.181, p = 0.000). In contrast, depression (EPDS) scores (Beta = 0.370, p = 0.000) were the most significant predictor of Unsettled-Irregular infant behaviour, followed by Anxious-Afraid Birth Emotions (Beta = 0.171, p = 0.000) and infant age (Beta = -0.196, p = 0.000). Mothers also perceived their infants as more Alert-Responsive (Beta = 0.080, p = 0.010) and Easier overall (Beta = 0.085, p = 0.008) after a Supported birth experience.

Conclusion

Maternal and infant outcomes were influenced by multiple physical and psychological perinatal variables. The mother's subjective experience appeared to be of equal significance to more objective factors (e.g. birthplace/mode). Social support enhanced the mother's childbirth experience, benefitting her perceptions of her baby's early temperament. These findings provide further support for current World Health Organisation intrapartum guidelines (2018) on the importance of making childbirth a 'positive experience' for women.

An assessment of dexmedetomidine as an opioid-sparing agent after neonatal open thoracic and abdominal operations

OBJECTIVE

To evaluate the efficacy of dexmedetomidine as an opioid-sparing agent in infants following open thoracic or abdominal operations.

METHODS

Retrospective review of postoperative neonates who received IV acetaminophen with or without dexmedetomidine. The primary outcome was opioid dosage within the first ten postoperative days. Secondary outcomes included times to extubation, full feedings and discharge.

RESULTS

112 infants met inclusion criteria. Those managed with dexmedetomidine received 1.8-4.3 times more opioid on postoperative days 1-3, had longer times to extubation and trended towards longer lengths of hospital stay than infants who were not. Opioid was dosed >0.2 ME/kg on only 23% of days when the acetaminophen dose was >40 mg/kg/day and 10% of days when the acetaminophen dose was >45 mg/kg.

CONCLUSION

Dexmedetomidine may not be opioid sparing after major operations in neonates and its use delays recovery. IV acetaminophen dosed at 40 mg/kg/day or greater may yield the most substantial opioid-sparing effect.

Practices of Procedural Pain Management in Neonates through Continuous Quality Improvement Measures

Objective

Although the benefits of pain control measures in neonates are well known, the actual usage was not optimal in our unit. Therefore, we implemented a quality improvement project to improve pain management practices through multiple Plan-Do-Study-Act (PDSA) cycles.

Method

Our project included hemodynamically stable newborns weighing ≥1300 g. We identified four common procedures: intravenous cannulation, venous sampling, heel prick, and nasogastric tube insertion. The selected pain control measures were skin-to-skin contact, breastfeeding, expressed breast milk orally, and oral sucrose. Between April 2019 and September 2019, we intervened multiple times and reassessed shortcomings. We encouraged evidence-based practices and gave solutions for shortcomings. Data were interpreted weekly to assess the compliance to pain control interventions.

Results

Minimal pain control measures (3-4%) were utilized for identified procedures before the project began. We could improve the use of pain control measures steadily and achieve the target of 80% of procedures after seven different interventions over five months. There was a retention of the effect on reassessing twice at second and fourth months of stopping further intervention once the target got achieved.

Conclusion

Quality Improvement science can identify the shortcomings and help to improve the compliance for pain control practices in neonates, as demonstrated in this neonatal unit.

Thoracic regional anesthesia and the impact on ventilation

Thoracic surgical incisions can be associated with intense pain or discomfort. Postoperative thoracic pain may be multifactorial in origin. Inadequate analgesia causes respiratory dysfunction. Adequate analgesia preserves pulmonary function and may hasten recovery. Intravenous opioids are widely used but sufficient analgesia is seldom achieved in doses that permit safe spontaneous ventilation. Thoracic regional anesthesia provides profound analgesia, is opiate sparing and has minimal depressant effects on ventilation. Thoracic regional anesthesia is both an effective alternative to systemic analgesics or can be used as part of a multimodal analgesic technique.

Postoperative Apnea in a Neonate Following an Epidural Bolus Dose Through a High Thoracic Epidural Catheter

Regional anesthesia is being used more frequently in the practice of pediatric anesthesia including neonates and infants. While generally safe and effective, adverse effects may occur related to catheter placement or its subsequent use. We present the rare occurrence of high motor blockade with apnea following the administration of a bolus dose of the local anesthetic agent, 2-chloroprocaine, into the thoracic epidural catheter of a 4-week-old, 2.2-kg former premature neonate. The patient had an epidural catheter that had been threaded from the caudal space to the thoracic level to provide analgesia following an abdominal surgical procedure. Subsequent investigation with a standard chest radiograph revealed a higher than intended placement of the epidural catheter (T4 instead of T8-10) which resulted in a transient high motor blockade with apnea. The epidural infusion was discontinued and assisted ventilation was provided by bag-valve-mask ventilation. Immediately, the heart rate and oxygen saturation returned to baseline values, and within 5 min the patient became more active, spontaneous ventilation resumed, and a strong cry was noted. The epidural catheter was removed and the remainder of the postoperative course was unremarkable. Adverse effects of epidural anesthesia in neonates are discussed and options for identifying the correct placement of a thoracic epidural catheter are reviewed.