Heel-lancing in newborns: behavioral and spectral analysis assessment of pain control methods

Pain in Neonates: Perceptions and Current Practices

All newborns experience pain during routine care, which can have long-lasting negative effects. Despite the availability of effective methods to prevent and reduce pain, most infants will receive ineffective or no treatment. Optimal pain management includes the reduction of the number of procedures performed, routine pain assessment and the use of effective pain-reducing interventions, most notably breastfeeding, skin-to-skin contact and sweet-tasting solutions. Parents are an essential component of the comprehensive assessment and management of infant pain; however, a gap exists regarding the uptake of parent-led interventions and the engagement of families. Practice recommendations for infant pain care are discussed.

[Translating evidence: pain treatment in newborns, infants, and toddlers during needle-related procedures : German version]

INTRODUCTION

Treatment of pain in preterm, sick, and healthy newborns and infants and toddlers (up to 2 years of age) is consistently reported to be inadequate, and effective strategies are poorly implemented.

OBJECTIVES

To present existing evidence of effective pain treatment strategies during needle-related procedures and to highlight initiatives focused on translating evidence into practice.

METHODS

This Clinical Update focuses on the 2022 International Association for the Study of Pain Global Year for Translating Pain Knowledge to Practice in the specific population of newborns, infants, and toddlers. Best evidence is reviewed, and existing knowledge translation strategies and programs available to implement evidence into practice are presented.

RESULTS

Effective strategies for newborn and young infants during frequently occurring needle procedures include small volumes of sweet solutions, breastfeeding, or skin-to-skin care when feasible and culturally acceptable. In addition, strategies such as nonnutritive sucking, positioning, swaddling, gentle touch, facilitated tucking, and secure holding can be used. For toddlers, the evidence is less robust, and discerning between pain and distress is challenging. However, strategies recommended for needlerelated procedures include upright secure comfort holding by parents/caregivers, age-appropriate distraction, and topical anesthetics. Translation of effective pain management needs to involve the family, who need to be supported and empowered to comfort their child during painful procedures. Organizational, nationwide, and global initiatives aimed at improving implementation of effective pain treatments exist.

CONCLUSION

There is evidence of effective pain management strategies for newborns, infants, and toddlers, and a great deal of effort is being made to translate knowledge into action.

Breastfeeding or breast milk for procedural pain in neonates

BACKGROUND

Pain in the neonate is associated with acute behavioural and physiological changes. Cumulative pain is associated with morbidities, including adverse neurodevelopmental outcomes. Studies have shown a reduction in changes in physiological parameters and pain score measurements following pre-emptive analgesic administration in neonates experiencing pain or stress. Non-pharmacological measures (such as holding, swaddling and breastfeeding) and pharmacological measures (such as acetaminophen, sucrose and opioids) have been used for analgesia. This is an update of a review first published in 2006 and updated in 2012.

OBJECTIVES

The primary objective was to evaluate the effectiveness of breastfeeding or supplemental breast milk in reducing procedural pain in neonates. The secondary objective was to conduct subgroup analyses based on the type of control intervention, gestational age and the amount of supplemental breast milk given.

SEARCH METHODS

We searched CENTRAL, MEDLINE, Embase, CINAHL and trial registries (ICTRP, ISRCTN and clinicaltrials.gov) in August 2022; searches were limited from 2011 forwards. We checked the reference lists of included studies and relevant systematic reviews.

SELECTION CRITERIA

We included randomised controlled trials (RCTs) or quasi-RCTs of breastfeeding or supplemental breast milk versus no treatment/other measures in neonates. We included both term (≥ 37 completed weeks postmenstrual age) and preterm infants (< 37 completed weeks' postmenstrual age) up to a maximum of 44 weeks' postmenstrual age. The study must have reported on either physiological markers of pain or validated pain scores.

DATA COLLECTION AND ANALYSIS

We assessed the methodological quality of the trials using the information provided in the studies and by personal communication with the authors. We extracted data on relevant outcomes, estimated the effect size and reported this as a mean difference (MD). We used the GRADE approach to assess the certainty of evidence.

MAIN RESULTS

Of the 66 included studies, 36 evaluated breastfeeding, 29 evaluated supplemental breast milk and one study compared them against each other. The procedures conducted in the studies were: heel lance (39), venipuncture (11), intramuscular vaccination (nine), eye examination for retinopathy of prematurity (four), suctioning (four) and adhesive tape removal as procedure (one). We noted marked heterogeneity in the control interventions and pain assessment measures amongst the studies. Since many studies included multiple arms with breastfeeding/supplemental breast milk as the main comparator, we were not able to synthesise all interventions together. Individual interventions are compared to breastfeeding/supplemental breast milk and reported. The numbers of studies/participants presented with the findings are not taken from pooled analyses (as is usual in Cochrane Reviews), but are the overall totals in each comparison. Overall, the included studies were at low risk of bias except for masking of intervention and outcome assessment, where nearly one-third of studies were at high risk of bias. Breastfeeding versus control Breastfeeding may reduce the increase in heart rate compared to holding by mother, skin-to-skin contact, bottle feeding mother's milk, moderate concentration of sucrose/glucose (20% to 33%) with skin-to-skin contact (low-certainty evidence, 8 studies, 784 participants). Breastfeeding likely reduces the duration of crying compared to no intervention, lying on table, rocking, heel warming, holding by mother, skin-to-skin contact, bottle feeding mother's milk and moderate concentration of glucose (moderate-certainty evidence, 16 studies, 1866 participants). Breastfeeding may reduce percentage time crying compared to holding by mother, skin-to-skin contact, bottle feeding mother's milk, moderate concentration sucrose and moderate concentration of sucrose with skin-to-skin contact (low-certainty evidence, 4 studies, 359 participants). Breastfeeding likely reduces the Neonatal Infant Pain Scale (NIPS) score compared to no intervention, holding by mother, heel warming, music, EMLA cream, moderate glucose concentration, swaddling, swaddling and holding (moderate-certainty evidence, 12 studies, 1432 participants). Breastfeeding may reduce the Neonatal Facial Coding System (NFCS) score compared to no intervention, holding, pacifier and moderate concentration of glucose (low-certainty evidence, 2 studies, 235 participants). Breastfeeding may reduce the Douleur Aigue Nouveau-né (DAN) score compared to positioning, holding or placebo (low-certainty evidence, 4 studies, 709 participants). In the majority of the other comparisons there was little or no difference between the breastfeeding and control group in any of the outcome measures. Supplemental breast milk versus control Supplemental breast milk may reduce the increase in heart rate compared to water or no intervention (low-certainty evidence, 5 studies, 336 participants). Supplemental breast milk likely reduces the duration of crying compared to positioning, massage or placebo (moderate-certainty evidence, 11 studies, 1283 participants). Supplemental breast milk results in little or no difference in percentage time crying compared to placebo or glycine (low-certainty evidence, 1 study, 70 participants). Supplemental breast milk results in little or no difference in NIPS score compared to no intervention, pacifier, moderate concentration of sucrose, eye drops, gentle touch and verbal comfort, and breast milk odour and verbal comfort (low-certainty evidence, 3 studies, 291 participants). Supplemental breast milk may reduce NFCS score compared to glycine (overall low-certainty evidence, 1 study, 40 participants). DAN scores were lower when compared to massage and water; no different when compared to no intervention, EMLA and moderate concentration of sucrose; and higher when compared to rocking or pacifier (low-certainty evidence, 2 studies, 224 participants). Due to the high number of comparator interventions, other measures of pain were assessed in a very small number of studies in both comparisons, rendering the evidence of low certainty. The majority of studies did not report on adverse events, considering the benign nature of the intervention. Those that reported on adverse events identified none in any participants. Subgroup analyses were not conducted due to the small number of studies.

AUTHORS' CONCLUSIONS

Moderate-/low-certainty evidence suggests that breastfeeding or supplemental breast milk may reduce pain in neonates undergoing painful procedures compared to no intervention/positioning/holding or placebo or non-pharmacological interventions. Low-certainty evidence suggests that moderate concentration (20% to 33%) glucose/sucrose may lead to little or no difference in reducing pain compared to breastfeeding. The effectiveness of breast milk for painful procedures should be studied in the preterm population, as there are currently a limited number of studies that have assessed its effectiveness in this population.

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.

Early Skin-to-Skin Contact in Preterm Infants: Is It Safe? An Italian Experience

BACKGROUND

Skin-to-skin contact (SSC) is one of the four components of kangaroo care (KC) and is also a valued alternative to incubators in low-income countries. SSC has also become a standard of care in high-income countries because of its short- and long-term benefits and its positive effect on infant growth and neurodevelopmental outcome. However, barriers in the implementation of SSC, especially with preterm infants, are common in NICUs because parents and health care professionals can perceive it as potentially risky for the clinical stability of preterm infants. Previous studies have assessed safety before and during SSC by monitoring vital parameters during short-time intervals.

AIMS

To demonstrate the safety of early SSC in preterm infants during at least 90 min intervals.

DESIGN

Prospective observational monocentric study.

METHODS

Preterm infants born between June 2018 and June 2020 with a gestational age of ≤33 weeks and a birth weight of <2000 g were monitored while performing an SSC session during the first three weeks of life. Infants with necrotizing enterocolitis, sepsis, and congenital malformations on mechanical ventilation or with more than five apneas in the hour before SSC were excluded. Continuous oxygen saturation (SaO2), heart rate (HR), and respiratory rate (RR) were registered during an SSC session and in the hour before. The minimum duration of an SSC session was 90 min. Information regarding postmenstrual age (PMA), body weight, respiratory support, presence of a central venous catheter and the onset of sepsis within 72 h after a session was collected. Two physicians, blinded to infant conditions and the period of analysis (before or during SSC), evaluated desaturation episodes (SaO2 < 85%, >15 s), bradycardia (HR < 100, >15 s) and apneas (pause in breathing > 20 s associated with desaturation and/or bradycardia). A Wilcoxon rank sum test was used for the statistical analysis.

RESULTS

In total, 83 episodes of SSC were analyzed for a total of 38 infants. The mean gestational age at birth was 29 weeks (range 23-33 weeks). Median PMA, days of life, and body weight at SSC were 31 weeks (range 25-34 weeks), 10 days (range 1-20 days), and 1131 g (range 631-2206 g), respectively. We found that 77% of infants were on respiratory support and 47% of them had a central venous catheter (umbilical or peripherally inserted central catheter) during SSC. The total duration of desaturation, bradycardia, and the number of apneas were not statistically different during the SSC session and the hour before. No catheter dislocation or ruptures were reported.

CONCLUSIONS

These findings highlighted the safety of early SSC in preterm infants and the possibility of performing it in an intensive care setting in the first weeks of life. In addition, these findings should reassure health care professionals offering this practice as a standard of care. SSC plays a key role in the care of preterm infants due to its short- and long-term positive benefits, and it deserves to be increasingly offered to infants and their parents.

Translating evidence: pain treatment in newborns, infants, and toddlers during needle-related procedures

Introduction

Treatment of pain in preterm, sick, and healthy newborns and infants and toddlers (up to 2 years of age) is consistently reported to be inadequate, and effective strategies are poorly implemented.

Objectives

To present existing evidence of effective pain treatment strategies during needle-related procedures and to highlight initiatives focused on translating evidence into practice.

Methods

This Clinical Update focuses on the 2022 International Association for the Study of Pain Global Year for Translating Pain Knowledge to Practice in the specific population of newborns, infants, and toddlers. Best evidence is reviewed, and existing knowledge translation strategies and programs available to implement evidence into practice are presented.

Results

Effective strategies for newborn and young infants during frequently occurring needle procedures include small volumes of sweet solutions, breastfeeding, or skin-to-skin care when feasible and culturally acceptable. In addition, strategies such as nonnutritive sucking, positioning, swaddling, gentle touch, facilitated tucking, and secure holding can be used. For toddlers, the evidence is less robust, and discerning between pain and distress is challenging. However, strategies recommended for needle-related procedures include upright secure comfort holding by parents/caregivers, age-appropriate distraction, and topical anesthetics. Translation of effective pain management needs to involve the family, who need to be supported and empowered to comfort their child during painful procedures. Organizational, nationwide, and global initiatives aimed at improving implementation of effective pain treatments exist.

Conclusion

There is evidence of effective pain management strategies for newborns, infants, and toddlers, and a great deal of effort is being made to translate knowledge into action.

Nurses' perceptions of infants' procedural pain assessment and alleviation with non-pharmacological methods in Estonia

PURPOSE

The purpose of this study was to describe nurses perceptions of infants' procedural pain assessment and alleviation with non-pharmacological methods including parental guidance in departments of neonatal and infant medicine and Neonatal Intensive Care (NICUs).

DESIGN AND METHODS

A descriptive cross-sectional survey was carried out among all nurses (n= 149) who were working in neonatal and infant departments or NICUs in Estonian hospitals. Altogether, 128 questionnaires were returned and 111 respondents were eligible (75% response rate). The data were analysed using statistical methods.

RESULTS

More than half of the nurses agreed that systematic documentation of the measurement of pain is necessary for nursing care and that it affects pain alleviation in infants. Half of the respondents (51%) confirmed that pain scales are important in the measurement of infants' pain, but 58% claimed they were able to assess pain in a reliable way without using pain assessment scales. Nurses also reported that they were unfamiliar with most pain scales and they were not routinely used in everyday practice. Nurses said that the most useful non-pharmacological pain alleviation methods were touching (83%) and positioning infants (78%), the most rarely used were skin-to-skin care (12%) and encouraging mothers to breastfeed the infant (34%). The majority of respondents (79%) reported that they do not know or do not have written instructions on pain assessment in their workplace, and only a few (10%) reported that they have participated in pain management courses during the last year.

CONCLUSIONS

There is a need to increase the use of pain assessment scales and pain documentation in everyday practice in those hospitals in Estonia. The use of scales in pain assessment was valued by few nurses. It seems that there is a lack of knowledge on non-pharmacological methods, and nurses reported using only a few non-pharmacological pain alleviation methods and guided parents on using them.

PRACTICE IMPLICATIONS

Nurses need pain management guidelines for everyday work, and in addition to nurses, written guidelines for parents are needed.

Neonatal heart rate variability: a contemporary scoping review of analysis methods and clinical applications

BACKGROUND

Neonatal heart rate variability (HRV) is widely used as a research tool. However, HRV calculation methods are highly variable making it difficult for comparisons between studies.

OBJECTIVES

To describe the different types of investigations where neonatal HRV was used, study characteristics, and types of analyses performed.

ELIGIBILITY CRITERIA

Human neonates ≤1 month of corrected age.

SOURCES OF EVIDENCE

A protocol and search strategy of the literature was developed in collaboration with the McGill University Health Center's librarians and articles were obtained from searches in the Biosis, Cochrane, Embase, Medline and Web of Science databases published between 1 January 2000 and 1 July 2020.

CHARTING METHODS

A single reviewer screened for eligibility and data were extracted from the included articles. Information collected included the study characteristics and population, type of HRV analysis used (time domain, frequency domain, non-linear, heart rate characteristics (HRC) parameters) and clinical applications (physiological and pathological conditions, responses to various stimuli and outcome prediction).

RESULTS

Of the 286 articles included, 171 (60%) were small single centre studies (sample size <50) performed on term infants (n=136). There were 138 different types of investigations reported: physiological investigations (n=162), responses to various stimuli (n=136), pathological conditions (n=109) and outcome predictor (n=30). Frequency domain analyses were used in 210 articles (73%), followed by time domain (n=139), non-linear methods (n=74) or HRC analyses (n=25). Additionally, over 60 different measures of HRV were reported; in the frequency domain analyses alone there were 29 different ranges used for the low frequency band and 46 for the high frequency band.

CONCLUSIONS

Neonatal HRV has been used in diverse types of investigations with significant lack of consistency in analysis methods applied. Specific guidelines for HRV analyses in neonates are needed to allow for comparisons between studies.

Newborn Infant Parasympathetic Evaluation Index for the Assessment of Procedural Pain in Nonanesthetized Infants: A Multicenter Pilot Study

OBJECTIVE

The aim of this study is to evaluate the ability of the Newborn Infant Parasympathetic Evaluation (NIPE) index to detect the response to nociceptive stimuli in nonanesthetized infants and to compare these results to simultaneous scoring by behavioral scales.

STUDY DESIGN

Thirty-six nonanesthetized infants admitted to neonatal/pediatric intensive care unit (N/PICUs) were enrolled to the study. Due to faulty records of the data, three patients had to be excluded. To detect pain caused by noxious stimuli, the heart-rate-variability-derived NIPE index and behavioral pain scales designed for measuring procedural pain in nonverbal children were used.

RESULTS

Forty-one painful events were available for analysis. We observed in the whole group a statistically significant decrease in NIPE values at 1, 2, and 3 minutes after a painful stimulus, in comparison to the NIPE value at rest and the statistically significant differences between the minimum NIPE value within 3 minutes after the stimulus in comparison to NIPE value at rest in the whole group, as well as in the subgroups of moderate and severe pain. Receiver operating characteristic (ROC) analysis has shown the strong sensitivity and specificity of the NIPE in detecting the noxious stimuli (ROC AUC: 0.767). We also found that the stronger the sensation of pain was, the more rapidly NIPE reached its lowest value.

DISCUSSION

Our study indicates that the painful procedures are associated with a significant decrease in the NIPE value within 3 minutes after a noxious stimulus. Based on our observation, the minimum value within 3 minutes from the painful procedure seems to be the most distinctive value.

The newborn infant parasympathetic evaluation index for acute procedural pain assessment in preterm infants

BACKGROUND

Accurate assessments of pain in hospitalized preterm infants present a major challenge in improving the short- and long-term consequences associated with painful experiences. We evaluated the ability of the newborn infant parasympathetic evaluation (NIPE) index to detect acute procedural pain in preterm infants.

METHODS

Different painful and stressful interventions were prospectively observed in preterm infants born at 25 + 0 to 35 + 6 weeks gestation. Pain responses were measured using the composite Premature Infant Pain Profile Revised (PIPP-R) scale, the NIPE index, and skin conductance responses (SCR). Outcome measures were correlations between the NIPE index, the PIPP-R score, and the SCR. Sensitivity/specificity analyses tested the accuracy of the NIPE index and SCR.

RESULTS

Two hundred and fifty-four procedures were recorded in 90 preterm infants. No significant correlation was found between PIPP-R and the NIPE index. PIPP-R and SCR were positively correlated (r = 0.27, P < 0.001), with stronger correlations for painful procedures (r = 0.68, P < 0.001) and especially for skin-breaking procedures (r = 0.82, P < 0.001). The NIPE index and SCR had high sensitivity and high negative predictive values to predict PIPP-R > 10, especially for skin-breaking painful procedures.

CONCLUSIONS

We found no significant correlation between the NIPE index and PIPP-R during routine painful or stressful procedures in preterm infants.

IMPACT

Exposure to repetitive pain can lead to neurodevelopmental sequelae. Behavior-based pain scales have limited clinical utility, especially for preterm infants. New devices for monitoring physiological responses to pain have not been validated sufficiently in preterm infants. This study found that the NIPE index was not significantly correlated to the validated PIPP-R scale during acute procedural pain. Secondary analysis of this study showed that NIPE index and SCRs may help to exclude severe pain in preterm infants. In clinical practice, measurements of physiological parameters should be combined with behavior-based scales for multidimensional pain assessments.

Analgesic effects of breast- and formula feeding during routine childhood immunizations up to 1 year of age

BACKGROUND

Data on analgesic effects of breast/formula milk sucking while receiving routine childhood immunizations are available only in early infancy, have rarely been compared in the same study, and are not accompanied by information on mothers' satisfaction/acceptance. Here we aimed to compare the analgesic effect of both methods vs. held-only controls up to 1 year of age, and verify mothers' satisfaction.

METHODS

Two to 12 months children subjected to vaccine were allocated into three groups: breastfed, formula-fed, and held-only controls. A video recording was performed to analyze pain parameters: crying latency/duration and specific scales [FLACC (Face, Legs, Activity, Cry, and Consolability), NIPS (Neonatal Infant Pain Scale)]. After the procedure, mothers filled in a satisfaction questionnaire.

RESULTS

One-hundred and sixty-two children were recruited: 54 breastfed, 35 formula fed, and 73 controls. Breastfed showed the longest crying latency, and together with formula fed, had the shortest duration and lowest pain scores. Most mothers appreciated not only the respective feeding-mediated pain mitigation method used, but also the simply-holding procedure. In all cases, they felt reassured, with an unexpected frequent underestimation of their child's pain during the shot.

CONCLUSIONS

The analgesic effect of breastfeeding during vaccination extends also to children >6 months old, and is obtained by formula too. Embracing the child may help to reassure mothers.

IMPACT

We confirmed the analgesic effect of breastfeeding during the vaccination procedures in early infancy. We show for the first time that this effect is extended also to children up to 1 year of age, and it may be obtained by formula feeding as well. Most mothers appreciated pain mitigation not only through feeding, but also the simply-holding procedure. In all cases, mothers felt reassured, with an unexpected frequent underestimation of their child' pain during the shot. The promotion of these easily feasible and well-accepted strategies should be further encouraged within health professionals during vaccination procedures.

The influence of breastfeeding on cortical and bio-behavioural indicators of procedural pain in newborns: Findings of a randomized controlled trial

AIMS

The objective of this study was to compare the influence of breastfeeding and 24% oral sucrose on pain-related electrophysiologic activity, bio-behavioural pain scores, physiologic recovery, and adverse events during heel lance.

STUDY DESIGN

Single-blind randomized controlled trial.

SUBJECTS

39 full-term infants were randomized to receive breastfeeding or 0.24 mL of 24% oral sucrose plus offered non-nutritive sucking 2 min prior to heel lance.

OUTCOME MEASURES

The primary outcome of pain-related potential was recorded on electroencephalogram. Secondary outcomes included Premature Infant Pain Profile - Revised (PIPP-R) score, physiologic recovery, and adverse events. Data were analyzed per protocol (ClinicalTrials.gov: NCT03272594).

RESULTS

Between November 2017 and January 2019, 20 infants were randomized to breastfeeding and 19 infants to receive oral sucrose. Infants who were breastfeeding had an appreciably smaller, yet not statistically different (F[1,15.9] = 0.58, p = 0.64, SE = 11.79), amplitude pain-related potential (peak amplitude 0.29 μV) following heel lance compared to infants who received oral sucrose (peak amplitude 8.97 μV). Mean PIPP-R scores were not statistically significantly different between groups following heel lance, however, they were indicative of low pain across groups. Mean time in seconds to physiologic recovery was faster in breastfeeding infants (M = 17.5, SD = 31.1) compared to oral sucrose (M = 70.8, SD = 144.3). There were no safety concerns.

DISCUSSION

Breastfeeding and oral sucrose both reduce bio-behavioural responses to pain, however, may differentially modulate pain response in the infant brain. Further research to understand the neurophysiologic effects of these interventions during acute painful procedures is needed.

Procedural Pain Assessment in Infants Without Analgosedation: Comparison of Newborn Infant Parasympathetic Evaluation and Skin Conductance Activity - A Pilot Study

Objective: New technologies to measure pain responses, such as heart rate variability and skin conductance hold promise in the development of tools that can be reliable and quantifiable of detecting pain. The main objective of this study was to assess the capability of two monitors i.e., Newborn Infant Parasympathetic Evaluation (NIPE) and Skin Conductance Algesimeter for detecting procedural pain in non-anesthetized infants. Materials and Methods: Thirty-three non-anesthetized infants were enrolled to the study. To detect pain caused by heel stick, NIPE, and Skin Conductance monitors and behavioral pain scales were used. Three minutes before and just after heel stick, pain was evaluated by behavioral scales, and simultaneously over the whole period by NIPE and SCA. Results: A statistically significant decrease of NIPE Index and an increase of SCA values were found after the HS procedure. There were no statistically significant differences between the decrease in NIPEi values and the increase in PPS values between subgroups based on pain assessment by behavioral-scale scores. Conclusion: Both NIPE and SCA can be useful for detection of procedural pain and may constitue an additional valuable tool for better handling of pain among patients treated in NICUs. More studies on larger groups of patients are needed.

Breastfeeding as an analgesic method during vaccinations

INTRODUCTION

Infants undergo painful stings such as intradermal and intramuscular stings during vaccination. Clinical trial have showed analgesic methods to reduce the painful in both infants and kids.

EVIDENCE ACQUISITION

There are different types of non-pharmacological interventions which have an analgesic effect in infants during vaccinations such as: breastfeeding, cladding the infants, the skin to skin contact, the use of sweetened substance.

EVIDENCE SYNTHESIS

A review of the primary and secondary literature was carried out in the database Medline(PubMed). The bibliographic research was focused on the critical reading of the studies of the last ten years. Eight articles, including seven randomized clinical trials and one systematic review have been found. All registered studies report a reduction of the average value of the pain measured through both validated rating scales and through the measurement of the average duration of the cry during and after the vaccination in breastfeed infants. However it hasn't been demonstrated a statistically significant improvement in physiological parameters.

CONCLUSIONS

It is desirable that the literature produce further studies related to the changes of the vital parameters during the breastfeeding which allow a clear comparison between clinical trials.

Using feeding to reduce pain during vaccination of formula-fed infants: a randomised controlled trial

OBJECTIVES

To assess the effectiveness and potential side effects of formula feeding to reduce pain during vaccination among infants.

STUDY DESIGN

In the setting of well-baby clinics we recruited a community-based sample of full-term born infants who were already formula fed by the choice of the parents (n=48, aged 4-10 weeks) and received their first DTaP-IPV-HepB-Hib and pneumococcal vaccinations and randomised them into two groups. To evaluate pain experienced during vaccination we compared infants who drank formula feeding before, during and after vaccination with infants who did not. Outcomes were observed cry duration and pain scores measured by means of the Neonatal Infant Pain Scale (NIPS) and the Face, Legs, Activity, Cry and Consolability (FLACC) scale. Side effects of drinking during vaccination were recorded. We performed intention-to-treat analyses using regression models, crude and adjusted for sex and age of the infant.

RESULTS

Pain at the moment of the second injection did not differ between groups. Drinking infants cried 33.5 s shorter (-56.6; -10.3). In the first minute after injection drinking infants experienced a faster pain reduction on the NIPS_Δt: regression coefficient 3.86 (95% CI 2.70 to 5.02) and FLACC_Δt: 4.42 (95% CI 2.85 to 5.99).

CONCLUSIONS

In line with findings of previous studies regarding breast feeding, formula feeding reduced vaccination pain in the recovery phase in full-term born infants receiving their first vaccinations between ages 4 and 10 weeks with no adverse effects. Professionals should discuss this non-costly and feasible pain-reducing intervention with parents of infants who receive vaccinations.

TRIAL REGISTRATION NUMBER

IRCTN 31383, post-results.

The biological embedding of neonatal stress exposure: A conceptual model describing the mechanisms of stress-induced neurodevelopmental impairment in preterm infants

The biological embedding of early life stress exposure may result in life-long neurodevelopmental impairment in preterm infants. Infants hospitalized in the neonatal intensive care unit are exposed to significant experiential, environmental, and physiologic stressors over the course of their extended hospitalization. Stress exposure during the sensitive period of brain development may alter biological processes, including functioning of the immune system, the autonomic nervous system, and the hypothalamic-pituitary-adrenal axis as well as gene expression. These alterations may subsequently affect brain structure and function. Changes to these processes may mediate the relationship between neonatal stress exposure and neurodevelopment in preterm infants and represent potential therapeutic targets to improve long-term outcomes. The purpose of this paper is to introduce a conceptual model, based on published research, that describes the mechanisms mediating stress exposure and neurodevelopment impairment in preterm infants and to provide the theoretical foundation on which to base future descriptive research, intervention studies, and clinical care.

A Randomized Trial to Evaluate the Effect of Two Topical Anesthetics on Pain Response During Frenotomy in Young Infants

Objective

To examine the comparative effectiveness of two topical anesthetics in controlling the pain associated with tongue-tie release (frenotomy) in young infants.

Design

Randomized trial.

Setting

A Pediatric Craniofacial Clinic.

Subjects

Forty-two infants who were referred for frenotomy were randomly allocated to receive the topical anesthetic gel 2% tetracaine or 20% benzocaine applied prior to frenotomy. Frenotomies were videotaped. The primary outcome measure was the Neonatal Facial Coding System (NFCS) score. Secondary outcome measures included cry duration and a visual analog scale (VAS) assessed by the parents.

Results

The two groups were comparable with regard to weight, age, gender, previous painful experience, and last feeding time. Median NFCS scores prior to frenotomy in the tetracaine and the benzocaine groups were 4.5 (IQR: 0.75–10.2) and 3.5 (IQR: 0–9.5), respectively (P = 0.89, 95% CI −3 to 4). During frenotomy, median NFCS score increased to 28 (IQR: 24.5–30.25) in the tetracaine group (P < 0.0001, median difference −22, 95% CI −24.5 to −19), and to 28 (IQR: 26–30) in the benzocaine group (P < 0.0001, median difference −23, 95% CI −27 to −17). Mean cry durations in the tetracaine and the benzocaine groups were 69.4 seconds and 63.9 seconds, respectively (P = 0.32, 95% CI −47 to 15), and mean VAS scores were 57.2 and 58.2, respectively (P = 0.89, 95% CI −15.2 to 13.4).

Conclusions

These topical anesthetics seem ineffective in controlling the pain associated with frenotomy. Clinicians should continue to search for an effective treatment for this procedure.

Defining pain in newborns: need for a uniform taxonomy?

A framework for defining pain terms such as acute, persistent, prolonged or chronic pain to newborns was derived from the scientific literature on neonatal pain assessments, previous attempts to define chronic pain and the clinical and neurophysiological features of neonatal pain. This novel framework incorporates the temporal features, localising characteristics, and secondary effects of the pain experienced, as well as the behavioural and physiological response patterns of newborns.

CONCLUSION

Although not evidence-based, this framework provides an initial starting point for defining commonly used neonatal pain terms. It will require future revision/refinement based on the accumulating evidence for non-acute pain.

Breast-Feeding Analgesia in Infants: An Update on the Current State of Evidence

To provide an updated synthesis of the current state of the evidence for the effectiveness of breast-feeding and expressed breast milk feeding in reducing procedural pain in preterm and full-term born infants. A systematic search of key electronic databases (PubMed, CINAHL, EMBASE) was completed. Of the 1032 abstracts screened, 21 were found eligible for inclusion. Fifteen studies reported on the use of breast-feeding or expressed breast milk in full-term infants and 6 reported on preterm infants. Direct breast-feeding was more effective than maternal holding, maternal skin-to-skin contact, topical anesthetics, and music therapy, and was as or more effective than sweet tasting solutions in full-term infants. Expressed breast milk was not consistently found to reduce pain response in full-term or preterm infants. Studies generally had moderate to high risk of bias. There is sufficient evidence to recommend direct breast-feeding for procedural pain management in full-term infants. Based on current evidence, expressed breast milk alone should not be considered an adequate intervention.

Breastfeeding for procedural pain in infants beyond the neonatal period

BACKGROUND

Randomised controlled trials (RCTs) show that breastfeeding newborn infants during painful procedures reduces pain. Mechanisms are considered to be multifactorial and include sucking, skin-to-skin contact, warmth, rocking, sound and smell of the mother, and possibly endogenous opiates present in the breast milk.

OBJECTIVES

To determine the effect of breastfeeding on procedural pain in infants beyond the neonatal period (first 28 days of life) up to one year of age compared to no intervention, placebo, parental holding, skin-to-skin contact, expressed breast milk, formula milk, bottle feeding, sweet-tasting solutions (e.g. sucrose or glucose), distraction, or other interventions.

SEARCH METHODS

We searched the following databases to 18 February 2016: the Cochrane Central Register of Controlled Trials (CENTRAL) (the Cochrane Library), MEDLINE including In-Process & Other Non-Indexed Citations (OVID), Embase (OVID), PsycINFO (OVID), and CINAHL (EBSCO); the metaRegister of Controlled Trials (mRCT), ClinicalTrials.gov (clinicaltrials.gov), and the World Health Organization International Clinical Trials Registry Platform (WHO ICTRP) (apps.who.int/trialsearch/) for ongoing trials.

SELECTION CRITERIA

We included RCTs and quasi-RCTs involving infants aged 28 days postnatal to 12 months and receiving breastfeeding while undergoing a painful procedure. Comparators included, but were not limited to, oral administration of water, sweet-tasting solutions, expressed breast or formula milk, no intervention, use of pacifiers, positioning, cuddling, distraction, topical anaesthetics, and skin-to-skin care. Procedures included, but were not limited to: subcutaneous or intramuscular injection, venipuncture, intravenous line insertion, heel lance, and finger lance. We applied no language restrictions.

DATA COLLECTION AND ANALYSIS

We used standard methodological procedures expected by Cochrane. Two review authors independently considered trials for inclusion in the review, assessed risk of bias, and extracted data. The main outcome measures were behavioural or physiological indicators and composite pain scores, as well as other clinically important outcomes reported by the authors of included studies. We pooled data for the most comparable outcomes and where data from at least two studies could be included. We used mean difference (MD) with 95% confidence interval (CI), employing a random-effects model for continuous outcomes measured on the same scales. For continuous outcomes measured on different scales, we pooled standardised mean differences (SMDs) and associated 95% CIs. For dichotomous outcomes, we planned to pool events between groups across studies using risk ratios (RRs) and 95% CIs. However, as insufficient studies reported dichotomous outcomes, we did not pool such events. We assessed the evidence using GRADE and created a 'Summary of findings' table.

MAIN RESULTS

We included 10 studies with a total of 1066 infants. All studies were conducted during early childhood immunisation. As the breastfeeding intervention cannot be blinded, we rated all studies as being at high risk of bias for blinding of participants and personnel. We assessed nine studies as being at low risk of bias for incomplete outcome data. In addition, we rated nine studies as high risk for blinding of outcome assessment. We scored risk of bias related to random sequence generation, allocation concealment, and selective reporting as unclear for the majority of the studies due to lack of information.Our primary outcome was pain. Breastfeeding reduced behavioural pain responses (cry time and pain scores) during vaccination compared to no treatment, oral water, and other interventions such as cuddling, oral glucose, topical anaesthetic, massage, and vapocoolant. Breastfeeding did not consistently reduce changes in physiological indicators, such as heart rate. We pooled data for duration of cry from six studies (n = 547 infants). Breastfeeding compared to water or no treatment resulted in a 38-second reduction in cry time (MD -38, 95% CI -50 to -26; P < 0.00001). The quality of the evidence according to GRADE for this outcome was moderate, as most infants were 6 months or younger, and outcomes may be different for infants during their 12-month immunisation. We pooled data for pain scores from five studies (n = 310 infants). Breastfeeding was associated with a 1.7-point reduction in standardised pain scores (SMD -1.7, 95% CI -2.2 to -1.3); we considered this evidence to be of moderate quality as data were primarily from infants younger than 6 months of age. We could pool heart rate data following injections for only two studies (n = 186); we considered this evidence to be of low quality due to insufficient data. There were no differences between breastfeeding and control (MD -3.6, -23 to 16).Four of the 10 studies had more than two study arms. Breastfeeding was more effective in reducing crying duration or pain scores during vaccination compared to: 25% dextrose and topical anaesthetic cream (EMLA), vapocoolant, maternal cuddling, and massage.No included studies reported adverse events.

AUTHORS' CONCLUSIONS

We conclude, based on the 10 studies included in this review, that breastfeeding may help reduce pain during vaccination for infants beyond the neonatal period. Breastfeeding consistently reduced behavioural responses of cry duration and composite pain scores during and following vaccinations. However, there was no evidence that breastfeeding had an effect on physiological responses. No studies included in this review involved populations of hospitalised infants undergoing other skin-breaking procedures. Although it may be possible to extrapolate the review results to this population, further studies of efficacy, feasibility, and acceptability in this population are warranted.

Comparison of effect of kangaroo mother care, breastfeeding and swaddling on Bacillus Calmette-Guerin vaccination pain score in healthy term neonates by a clinical trial

BACKGROUND/AIM

The purpose of this research was to compare the analgesic effect of kangaroo mother care (KMC), breastfeeding and swaddling in Bacillus Calmette-Guerin (BCG) vaccination in term neonates.

METHODS

In a randomized 120 healthy term neonates who received routine BCG vaccination in the first day of their life are distributed into three groups. In group 1, neonates breastfed two minutes before, during and one minute after BCG vaccination. In group 2, neonates received KMC 10 minutes before, during and one minute after vaccination and in group 3, they were swaddled 10 minutes before, during and one minute after vaccination. Primary outcomes included pain score during, one minute and two minutes after BCG vaccination and obtaining pain score of less than three during vaccination .

RESULTS

Pain scores during, one minute and two minutes after vaccination in group 1 were lower than in groups 2 and 3. Group 1 had higher success rate in painless vaccination and had lower crying duration in comparison to another groups (p < 0.05) Conclusion: Breastfeeding was more effective than KMC and swaddling in reduction of BCG vaccination pain in healthy term neonates.

Pain assessment during blood collection from sedated and mechanically ventilated children

Objective

This study assessed pain and observed physiological parameters in sedated and mechanically ventilated children during a routine procedure.

Methods

This observational study was performed in a pediatric intensive care unit. Thirty-five children between 1 month and 12 years of age were assessed before, during, and five minutes after an arterial blood collection for gas analysis (painful procedure). Face, Legs, Activity, Cry and Consolability scale was used to assess pain. In addition, patients' heart rate, respiratory rate, peripheral saturation of oxygen and blood pressure (diastolic and systolic) were recorded. COMFORT-B scale was applied before the pain and physiological parameter assessments to verify sedation level of the subjects.

Results

There was an increase in Face, Legs, Activity, Cry and Consolability score (p = 0.0001) during painful stimuli. There was an increase in heart rate (p = 0.03), respiratory rate (p = 0.001) and diastolic blood pressure (p = 0.006) due to pain caused by the routine procedure.

Conclusions

This study suggests that assessments of pain using standard scales, such as Face, Legs, Activity, Cry and Consolability score, and other physiological parameters should be consistently executed to optimize pain management in pediatric intensive care units.

Development of Cardiovascular Indices of Acute Pain Responding in Infants: A Systematic Review

Background. Cardiovascular indices of pain are pervasive in the hospital setting. However, no prospective research has examined the development of cardiac responses to acutely painful procedures in the first year of life. Objectives. Our main goal was to synthesize existing evidence regarding the development of cardiovascular responses to acutely painful medical procedures over the first year of life in preterm and term born infants. Methods. A systematic search retrieved 6994 articles to review against inclusion criteria. A total of 41 studies were included in the review. Results. In response to acutely painful procedures, most infants had an increase in mean heart rate (HR) that varied in magnitude both across and within gestational and postnatal ages. Research in the area of HR variability has been inconsistent, limiting conclusions. Conclusions. Longitudinal research is needed to further understand the inherent variability of cardiovascular pain responses across and within gestational and postnatal ages and the causes for the variability.

Non-pharmacological management of infant and young child procedural pain

BACKGROUND

Infant acute pain and distress is commonplace. Infancy is a period of exponential development. Unrelieved pain and distress can have implications across the lifespan.  This is an update of a previously published review in the Cochrane Database of Systematic Reviews, Issue 10 2011 entitled 'Non-pharmacological management of infant and young child procedural pain'.

OBJECTIVES

To assess the efficacy of non-pharmacological interventions for infant and child (up to three years) acute pain, excluding kangaroo care, and music. Analyses were run separately for infant age (preterm, neonate, older) and pain response (pain reactivity, immediate pain regulation). 

SEARCH METHODS

For this update, we searched the Cochrane Central Register of Controlled Trials (CENTRAL) in The Cochrane Library (Issue 2 of 12, 2015), MEDLINE-Ovid platform (March 2015), EMBASE-OVID platform (April 2011 to March 2015), PsycINFO-OVID platform (April 2011 to February 2015), and CINAHL-EBSCO platform (April 2011 to March 2015). We also searched reference lists and contacted researchers via electronic list-serves. New studies were incorporated into the review. We refined search strategies with a Cochrane-affiliated librarian. For this update, nine articles from the original 2011 review pertaining to Kangaroo Care were excluded, but 21 additional studies were added.

SELECTION CRITERIA

Participants included infants from birth to three years. Only randomised controlled trials (RCTs) or RCT cross-overs that had a no-treatment control comparison were eligible for inclusion in the analyses. However, when the additive effects of a non-pharmacological intervention could be assessed, these studies were also included. We examined studies that met all inclusion criteria except for study design (e.g. had an active control) to qualitatively contextualize results. There were 63 included articles in the current update.

DATA COLLECTION AND ANALYSIS

Study quality ratings and risk of bias were based on the Cochrane Risk of Bias Tool and GRADE approach. We analysed the standardized mean difference (SMD) using the generic inverse variance method.

MAIN RESULTS

Sixty-three studies, with 4905 participants, were analysed. The most commonly studied acute procedures were heel-sticks (32 studies) and needles (17 studies). The largest SMD for treatment improvement over control conditions on pain reactivity were: non-nutritive sucking-related interventions (neonate: SMD -1.20, 95% CI -2.01 to -0.38) and swaddling/facilitated tucking (preterm: SMD -0.89; 95% CI -1.37 to -0.40). For immediate pain regulation, the largest SMDs were: non-nutritive sucking-related interventions (preterm: SMD -0.43; 95% CI -0.63 to -0.23; neonate: SMD -0.90; 95% CI -1.54 to -0.25; older infant: SMD -1.34; 95% CI -2.14 to -0.54), swaddling/facilitated tucking (preterm: SMD -0.71; 95% CI -1.00 to -0.43), and rocking/holding (neonate: SMD -0.75; 95% CI -1.20 to -0.30). Fifty two of our 63 trials did not report adverse events. The presence of significant heterogeneity limited our confidence in the findings for certain analyses, as did the preponderance of very low quality evidence.

AUTHORS' CONCLUSIONS

There is evidence that different non-pharmacological interventions can be used with preterms, neonates, and older infants to significantly manage pain behaviors associated with acutely painful procedures. The most established evidence was for non-nutritive sucking, swaddling/facilitated tucking, and rocking/holding. All analyses reflected that more research is needed to bolster our confidence in the direction of the findings. There are significant gaps in the existing literature on non-pharmacological management of acute pain in infancy.

Comparing the effect of swaddling and breastfeeding and their combined effect on the pain induced by BCG vaccination in infants referring to Motahari Hospital, Jahrom, 2010-2011

BACKGROUND AND AIM

Despite the clinical importance of pain, many neonates are subjected to numerous painful invasive procedures and their complications as part of their care. This study has been designed to investigate the effect of swaddling and breastfeeding, and their combined effect on the pain induced by BCG vaccination in healthy term infants.

METHOD

This randomized double-blind intervention study was performed on 131 healthy term neonates in Motahari Hospital of Jahrom. The samples were randomly assigned into three intervention groups and a control group. The infants in the swaddled group were swaddled 2 minutes before and 2 minutes after vaccination. The infants in the breastfed group were breastfed within 45 minutes before vaccination. The infants in the combination group were both breast fed before and swaddled within vaccination but the infants in the control group were vaccinated without any intervention. Heart rate and oxygen saturation level of neonates were recorded in the 3 phases of: baseline, injection and 2 minutes after injection. Furthermore, the neonates' faces were recorded using a video camera. Then pain intensity was measured by Neonatal Facial Coding System (NFCS). Mean Score of pain intensity and physiological responses of subjects were statistically analyzed using non parametrical Kruskal-Wallis test and Mann-Whitney.

RESULTS

The mean of pain intensity (NFCS) and changes in the heart rate at injection time to the baseline in the three intervention groups in comparison with the control group showed statistically significant difference (p=0.003 and p=0.002 respectively). However changes in blood oxygen saturation level, were not statistically significant difference between four groups.

CONCLUSION

Regarding to the significant impact of both breastfeeding and swaddling on the pain reduction of vaccination, it is recommended to take benefit of these two safe and available non-pharmacological methods in order to relief pain during painful procedures.

Pain in the neonate: focus on nonpharmacologic interventions

The assessment and treatment of pain in the neonate, especially preterm neonates, has been a challenge in the NICU for many years. Nurses caring for these vulnerable patients are in a key position to not only recognize when the neonate is experiencing pain but to also work collaboratively with other health care providers in determining the best method to treat and help prevent pain associated with procedures and routine caregiving activities. The American Academy of Pediatrics along with parent groups has recognized the importance of pain-prevention programs in treating pain in the neonate. Nurses, by anticipating and reducing both painful procedures and bedside interruptions, along with innovative nonpharmacologic interventions, can dramatically decrease the neonate's exposure to pain and the potential for long-term effects. An overview of nonpharmacologic interventions in the treatment of neonatal pain is provided for NICU nurses to help them effectively reduce their patient's pain and discomfort.

Measurement of Acute Pain in Infants

Background:

The use of non-validated pain measurement tools to assess infant pain represents a serious iatrogenic threat to the developing neonatal nervous system. One partial explanation for this practice may be the contradictory empirical data from studies that use newborn pain management tools constructed for infants of different developmental stages or exposed to different environmental stressors.

Purpose:

The purpose of this review is to evaluate the evidence regarding the physiologic and behavioral variables that accurately assess and measure acute pain response in infants.

Methodology:

A literature search was conducted using PUBMED and CINAHL and the search terms infant, neonate/neonatal, newborn, pain, assessment, and measurement to identify peer-reviewed studies that examined the validity and reliability of behavioral and physiological variables used for investigation of infant pain. Ten articles were identified for critical review. Principal findings: Strong evidence supports the use of the behavioral variables of facial expressions and body movements and the physiologic variables of heart rate and oxygen saturation to assess acute pain in infants.

Conclusion:

It is incumbent upon researchers and clinical nurses to ensure the validity, reliability, and feasibility of pain measures, so that the outcomes of their investigations and interventions will be developmentally appropriate and effective pain management therapies.

Pain assessment and measurement in neonates: an updated review

Pain assessment and measurement are the cornerstones of pain management. Pain assessment connotes a comprehensive multidimensional description. Conversely, pain measurement provides a numeric quantitative description of each factor illustrating pain qualities. Pain scales provide a composite score used to guide practice and research. The type of infant pain instrument chosen is a significant factor in guiding pain management practice. The purpose of this review was to summarize current infant pain measures by introducing a conceptual framework for pain measurement. Although more than 40 infant pain instruments exist, many were devised solely for research purposes; several of the newly developed instruments largely overlap with existing instruments. Integration of pain management into daily practice remains problematic. Understanding how each instrument measures infant pain allows clinicians to make better decisions about what instrument to use with which infant and in what circumstances. In addition, novel new measurement techniques need further testing.

Analgesia in newborns: a case-control study of the efficacy of nutritive and non-nutritive sucking stimuli

PURPOSE

To verify the nutritive and non-nutritive stimuli efficacy in the newborn's response to pain during venipuncture.

METHODS

The main sample was composed of 64 newborns that were randomly divided into three groups. The first group (n=20) received nutritive sucking stimulus that was performed through maternal breastfeeding. The second group (n=21) received non-nutritive sucking stimulus that was performed through the introduction of the researcher little finger in the newborn's oral cavity. The third group or control group (n=23) did not receive any analgesia stimulus. The newborns were evaluated using the Neonatal Infant Pain Scale, and the responses to painful stimuli were compared.

RESULTS

The nutritive as well as non-nutritive suction methods provided a comforting effect, resulting in lower pain response scores (p<0.05). There was no difference between the analgesia provided by both methods (p>0.05).

CONCLUSION

The nutritive and the non-nutritive sucking stimuli proved to be efficacious tools in relieving pain among newborns.

Breastfeeding or breast milk for procedural pain in neonates

BACKGROUND

Physiological changes brought about by pain may contribute to the development of morbidity in neonates. Clinical studies have shown reduction in changes in physiological parameters and pain score measurements following pre-emptive analgesic administration in situations where the neonate is experiencing pain or stress. Non-pharmacological measures (such as holding, swaddling and breastfeeding) and pharmacological measures (such as acetaminophen, sucrose and opioids) have been used for this purpose.

OBJECTIVES

The primary objective was to evaluate the effectiveness of breastfeeding or supplemental breast milk in reducing procedural pain in neonates. The secondary objective was to conduct subgroup analyses based on the type of control intervention, gestational age and the amount of supplemental breast milk given.

SEARCH METHODS

We performed a literature search using the Cochrane Central Register of Controlled Trials (CENTRAL) (The Cochrane Library 2011, Issue 10), MEDLINE (1966 to February 2011), EMBASE (1980 to February 2011), CINAHL (1982 to February 2011), abstracts from the annual meetings of the Society for Pediatric Research (1994 to 2011), and major paediatric pain conference proceedings. We did not apply any language restrictions.

SELECTION CRITERIA

Randomised controlled trials (RCTs) or quasi-RCTs of breastfeeding or supplemental breast milk versus no treatment/other measures in neonates were eligible for inclusion in this review. The study must have reported on either physiologic markers of pain or validated pain scores.

DATA COLLECTION AND ANALYSIS

We assessed the methodological quality of the trials using the information provided in the studies and by personal communication with the authors. We extracted data on relevant outcomes, estimated the effect size and reported this as a risk ratio (RR), risk difference (RD) and weighted mean difference (MD) as appropriate.

MAIN RESULTS

Of twenty eligible studies, ten evaluated breastfeeding and ten evaluated supplemental breast milk. Sixteen studies analysed used heel lance and four used venepuncture as procedure. We noted marked heterogeneity in control intervention and pain assessment measures among the studies. Neonates in the breastfeeding group had statistically a significantly lower increase in heart rate, reduced proportion of crying time and reduced duration of first cry and total crying time compared to positioning (swaddled and placed in a crib), holding by mother, placebo, pacifier use, no intervention or oral sucrose group, or both.Premature Infant Pain Profile (PIPP) scores were significantly lower in the breastfeeding group compared to positioning, placebo or oral sucrose group, or both. However, there was no statistically significant difference in PIPP scores when compared to no intervention. Douleur Aigue Nouveau-ne scores (DAN) were significantly lower in the breastfeeding group compared to the placebo group and the group held in mother's arms, but not when compared to the glucose group. Neonatal Infant Pain Scale (NIPS) was significantly lower in the breastfeeding group compared to the no intervention group, but there was no difference when compared to the oral sucrose group. The Neonatal Facial Coding System (NFCS) was significantly lower in the breastfeeding group when compared to oral glucose, pacifier use, holding by mother and no intervention, but no difference was found when compared to formula feeding.Supplemental breast milk yielded variable results. Neonates in the supplemental breast milk group had a significantly lower increase in heart rate, a reduction in duration of crying and a lower NFCS compared to the placebo group. Neonates in the supplemental breast milk group had a significantly higher increase in heart rate changes when compared to the sucrose group. Sucrose (in any concentration, i.e. 12.5%, 20%, 25%) was found to reduce the duration of cry when compared to breast milk, as did glycine, pacifier use, rocking, or no intervention. Breast milk was found not to be effective in reducing validated and non-validated pain scores such as NIPS, NFCS, and DAN; only being significantly better when compared to placebo (water) or massage. We did not identify any study that has evaluated safety/effectiveness of repeated administration of breastfeeding or supplemental breast milk for pain relief.

AUTHORS' CONCLUSIONS

If available, breastfeeding or breast milk should be used to alleviate procedural pain in neonates undergoing a single painful procedure rather than placebo, positioning or no intervention. Administration of glucose/sucrose had similar effectiveness as breastfeeding for reducing pain. The effectiveness of breast milk for painful procedure should be studied in the preterm population, as there are currently a limited number of studies in the literature that have assessed it's effectiveness in this population.

Heart rate dynamics during acute pain in newborns

Autonomic nervous system modulation of heart rate is significantly altered during painful procedures in newborns. Most studies investigating pain employed only linear-based analysis methods, thus ignoring the complex, non-linear nature of heart rate control mechanisms. The emergences of dynamic, nonlinear analysis methods enable us to uncover information embedded in the fluctuations of heart rate not otherwise noticeable. Our objective was to examine how cardiac dynamics change in newborns who undergo heel lancing by analyzing linear and nonlinear characteristics of heart rate fluctuations. We used dynamic nonlinear analyses methods to reveal heart rate variability and complexity alterations during painful stimulus in newborns. Poincaré plots were applied to examine the dynamics of the system, sample entropy to investigate the complexity of the system, and detrended fluctuation analysis, to reveal the fractal properties of the system. Heart rate significantly increased (165 vs.123 beats per minute, p < 0.001) while variability decreased. Sample entropy and the quantitative measures of the Poincaré plots (SD1 and SD2) significantly decreased during heel lancing (0.75 vs. 1.0, p < 0.01; 6.4 vs. 12.8, p < 0.001; and 30.4 vs. 50.5, p < 0.01, respectively). Detrended fluctuation analysis showed a significant decrease in the short-term scaling exponent α1 (1.06 vs. 1.3, p < 0.001), and an increase in the long-term scaling exponent α2 (1.5 vs. 1.1, p < 0.001). Our results indicate altered complexity of heart rate variability during painful stimulus in newborns and disruption of the mechanisms that regularly control it. Such alterations resemble certain pathological conditions and may represent stress reaction.

Does breastfeeding reduce acute procedural pain in preterm infants in the neonatal intensive care unit? A randomized clinical trial

Managing acute procedural pain effectively in preterm infants in the neonatal intensive care unit remains a significant problem. The objectives of this study were to evaluate the efficacy of breastfeeding for reducing pain and to determine if breastfeeding skills were altered after this treatment. Fifty-seven infants born at 30-36 weeks gestational age were randomized to be breastfed (BF) or to be given a soother during blood collection. Changes in the Behavioral Indicators of Infant Pain (BIIP) and in mean heart rate (HR) across 3 phases of blood collection were measured. In the BF group, the Premature Infant Breastfeeding Behaviors (PIBBS) scale was scored before and 24 hours after blood collection. Longitudinal regression analysis was used to compare changes in Lance/squeeze and Recovery phases of blood collection between groups, with gestational age at birth, baseline BIIP scores, and mean HR included as covariates. Differences in PIBBS scores were assessed using a paired t-test. Relationships between PIBBS scores, BIIP scores, and HR were evaluated with Pearson correlations. No differences between treatment groups were found: BIIP (P=0.44, confidence interval [CI] -1.60-0.69); HR (P=0.73, CI -7.0-10.0). Infants in the BF group showed improved PIBBS scores after the treatment (P<0.01, CI -2.7 to -0.2). Lower BIIP scores during the Lance/squeeze were associated significantly with more mature sucking patterns (r=-0.39, P<0.05). Breastfeeding during blood collection did not reduce pain indices or interfere with the acquisition of breastfeeding skills. Exploratory analyses indicate there may be benefit for infants with mature breastfeeding abilities.

Effects of skin-to-skin contact on autonomic pain responses in preterm infants

The purpose of this randomized crossover trial was to determine the effects on autonomic responses in preterm infants of longer Kangaroo Care (30 minutes, KC30) and shorter KC (15 minutes, KC15) before and throughout heel stick compared with incubator care (IC). Beat-to-beat heart rate (HR) and spectral power analysis of heart rate variability, low frequency power (LF), high frequency power (HF), and LF/HF ratio were measured in 26 infants. HR changes from Baseline to Heel Stick were significantly less in KC30 and KC15 than in IC, and more infants had HR decrease in IC than in 2 KC conditions. In IC, LF and HF significantly increased from Baseline to Heel Stick and dropped from Heel Stick to Recovery; in 2 KC conditions, no changes across study phases were found. During Heel Stick, LF and HF were significantly higher in IC than in KC30. In all 3 conditions, LF/HF ratio decreased from Baseline to Heel Stick and increased to Recovery; no differences were found between IC and two KC conditions. Both longer and shorter KC before and throughout heel stick can stabilize HR response in preterm infants, and longer KC significantly affected infants' sympathetic and parasympathetic responses during heel stick compared with incubator care.

PERSPECTIVE

This study showed that KC has a significant effect on reducing autonomic pain responses in preterm infants. The findings support that KC is a safe and effective pain intervention in the neonatal intensive care unit.

Nonpharmacological management of procedural pain in infants and young children: an abridged Cochrane review

BACKGROUND

Acute pain and distress during medical procedures are commonplace for young children.

OBJECTIVE

To assess the efficacy of nonpharmacological interventions for acute procedural pain in children up to three years of age.

METHODS

Study inclusion criteria were: participants <3 years of age, involved in a randomized controlled or crossover trial, and use of a 'no treatment' control group (51 studies; n=3396). Additional studies meeting all criteria except for study design (eg, use of active control group) were qualitatively described (n=20).

RESULTS

For every intervention, data were analyzed separately according to age group (preterm-born, term-born neonate and older infant ⁄ young child) and type of pain response (pain reactivity, immediate pain-related regulation). The largest standardized mean differences (SMD) for pain reactivity were as follows: sucking-related interventions (preterm: -0.42 [95% CI -0.68 to -0.15]; neonate -1.45 [CI -2.34 to -0.57]), kangaroo care (preterm -1.12 [95% CI -2.04 to -0.21]), and swaddling ⁄ facilitated tucking (preterm -0.97 [95% CI -1.63 to -0.31]). For immediate pain-related regulation, the largest SMDs were: sucking-related interventions (preterm -0.38 [95% CI -0.59 to -0.17]; neonate -0.90 [CI -1.54 to -0.25]), kangaroo care 0.77 (95% CI -1.50 to -0.03]), swaddling ⁄ facilitated tucking (preterm -0.75 [95% CI -1.14 to -0.36]), and rocking ⁄ holding (neonate -0.75 [95% CI -1.20 to -0.30]). The presence of significant heterogeneity limited confidence in nonsignificant findings for certain other analyses.

CONCLUSIONS

Although a number of nonpharmacological treatments have sufficient evidence supporting their efficacy with preterm infants and healthy neonates, no treatments had sufficient evidence to support efficacy with healthy older infants ⁄ young children.

Cuidado humanístico e percepções de enfermagem diante da dor do recém-nascido

Este estudo objetivou apreender o significado do cuidado oferecido pelo enfermeiro ao recém-nascido em procedimentos dolorosos e conhecer as intervenções realizadas pelos enfermeiros para amenizar a dor do recém-nascido. Estudo descritivo, realizado na Unidade de Terapia Intensiva Neonatal de um hospital público de Fortaleza-CE em julho/2010. Os sujeitos foram dez enfermeiras, e a coleta de dados se realizou através de um questionário. Os dados foram organizados em três categorias: O significado de cuidado diante da dor do recém-nascido; a assistência humanizada junto ao recém-nascido; e intervenções de enfermagem diante da dor do recém-nascido. Estes foram analisados à luz da Teoria Humanística de Paterson e Zderad. Constatou-se que o cuidado ao recém-nascido deveria ser direcionado a minimizar os fatores estressores durante a situação dolorosa e que as intervenções citadas foram predominantemente não farmacológicas, envolvendo ações desenvolvidas para a recém-nascido e o ambiente da Unidade.

Non-pharmacological management of infant and young child procedural pain

BACKGROUND

Infant acute pain and distress is commonplace. Infancy is a period of exponential development. Unrelieved pain and distress can have implications across the lifespan. 

OBJECTIVES

To assess the efficacy of non-pharmacological interventions for infant and child (up to three years) acute pain, excluding breastmilk, sucrose, and music. Analyses accounted for infant age (preterm, neonate, older) and pain response (pain reactivity, pain-related regulation). 

SEARCH STRATEGY

We searched CENTRAL in The Cochrane Library (2011, Issue 1), MEDLINE (1966 to April 2011), EMBASE (1980 to April 2011), PsycINFO (1967 to April 2011), Cumulative Index to Nursing and Allied Health Literature (1982 to 2011), Dissertation Abstracts International (1980 to 2011) and www.clinicaltrials.gov. We also searched reference lists and contacted researchers via electronic list-serves.

SELECTION CRITERIA

Participants included infants from birth to three years. Only randomized controlled trials (RCTs) or RCT cross-overs that had a no-treatment control comparison were eligible for inclusion in the analyses. We examined studies that met all inclusion criteria except for study design (e.g. had an active control) to qualitatively contextualize results.

DATA COLLECTION AND ANALYSIS

We refined search strategies with three Cochrane-affiliated librarians. At least two review authors extracted and rated 51 articles. Study quality ratings were based on a scale by Yates and colleagues. We analyzed the standardized mean difference (SMD) using the generic inverse variance method. We also provided qualitative descriptions of 20 relevant but excluded studies.

MAIN RESULTS

Fifty-one studies, with 3396 participants, were analyzed. The most commonly studied acute procedures were heel-sticks (29 studies) and needles (n = 10 studies). The largest SMD for treatment improvement over control conditions on pain reactivity were: non-nutritive sucking-related interventions (preterm: SMD -0.42; 95% CI -0.68 to -0.15; neonate: SMD -1.45, 95% CI -2.34 to -0.57), kangaroo care (preterm: SMD -1.12, 95% CI -2.04 to -0.21), and swaddling/facilitated tucking (preterm: SMD -0.97; 95% CI -1.63 to -0.31). For immediate pain-related regulation, the largest SMDs were: non-nutritive sucking-related interventions (preterm: SMD -0.38; 95% CI -0.59 to -0.17; neonate: SMD -0.90, 95% CI -1.54 to -0.25), kangaroo care (SMD -0.77, 95% CI -1.50 to -0.03), swaddling/facilitated tucking (preterm: SMD -0.75; 95% CI -1.14 to -0.36), and rocking/holding (neonate: SMD -0.75; 95% CI -1.20 to -0.30). The presence of significant heterogeneity limited our confidence in the lack of findings for certain analyses.

AUTHORS' CONCLUSIONS

There is evidence that different non-pharmacological interventions can be used with preterms, neonates, and older infants to significantly manage pain behaviors associated with acutely painful procedures.

Kangaroo care and behavioral and physiologic pain responses in very-low-birth-weight twins: a case study

The purpose of this case study was to describe pain responses in three study conditions: longer (30 minutes) kangaroo care (KC) before and throughout heel stick (KC30), shorter (15 minutes) KC before and throughout heel stick (KC15), and incubator care throughout heel stick (IC) in 28-week gestational age twins. Pain responses were measured by crying time, Preterm Infant Pain Profile (PIPP), and heart rate variability indexes, including low-frequency power (LF, representing sympathetic activity), high-frequency power (HF, parasympathetic activity), and LF/HF ratio (sympathetic-parasympathetic balance). Both twins cried more and had higher PIPP pain scores and tachycardia during heel stick in the IC condition. Infant B had an incident of apnea and tachycardia by the end of the heel stick and a bradycardia episode during recovery in the IC condition. The twins had lower LF/HF ratios (better autonomic nervous system balance) during recovery in both longer and shorter KC conditions compared with the IC condition. Infant B had difficulty returning to LF/HF ratio baseline level after the painful procedure in the IC condition. These data suggest that both longer and shorter KC before and throughout painful procedures can be helpful in reducing behavioral and physiologic pain responses in preterm infants.

Analgesic effects of sweet-tasting solutions for infants: current state of equipoise

OBJECTIVE

The goal was to review published studies of analgesic effects of sweet solutions, to ascertain areas with sufficient evidence of effectiveness and areas of uncertainty.

METHODS

Databases searched included Medline, Embase, the Cumulative Index to Nursing and Allied Health Literature database, and PsycINFO, using the terms pain*, infant*, neonat*, newborn*, sucrose, glucose, and alternative sugars. Publications were sorted according to type, year, painful procedure studied, placebo/no-treatment groups, population studied, and country of publication.

RESULTS

A total of 298 relevant unique publications involving human infants were identified; 125 (42%) were primary research studies, of which 116 (93%) were randomized controlled trials. Healthy preterm or term newborns were included in 82 studies (65%), and sick or very low birth weight infants were included in 22 (18%). Most studies included single episodes of painful procedures, with only 3 (2%) conducted over long periods. Procedures investigated most frequently were heel lance (49%), venipuncture (14%), and intramuscular injection (14%). Placebo or no-treatment groups were included in 111 studies (89%); in 103 (93%) of those studies, sweet solutions reduced behavioral responses, compared with placebo/ no treatment.

CONCLUSION

Clinical equipoise relating to analgesic effects of sweet solutions no longer exists for single episodes of procedures for healthy preterm and term newborn infants. Uncertainties include outcomes after prolonged use of sweet solutions, concomitant use of other analgesics, and effectiveness beyond the newborn period. Future research should focus on addressing these knowledge and research gaps.