Pain management in newborns: from prevention to treatment

Opioid equipotency conversions for hospitalized infants: a systematic review

Hospitalized infants commonly receive opioids to reduce pain and minimize distress during invasive procedures. However, infant neurodevelopment is significantly impacted by cumulative and prolonged opioid exposures. While opioid conversion has been studied extensively in adults, no standardized equipotency opioid conversions exist for hospitalized infants and opioid stewardship efforts are inconsistent. We performed a systematic review to identify opioid dosing conversions commonly used in hospitalized infants <1 year of age, finding fourteen articles which documented or cited a calculation of cumulative opioid exposure. Morphine milligram equivalents (MME) conversion factors varied widely, with nine studies citing conversion equivalent equations commonly used in adults. Efforts to expand safe opioid stewardship to hospitalized infants will require evidence-based consensus for opioid equipotency dose conversions which acknowledge the unique physiology of infants.

Influence of mothers' stress on their infants' stress level: A preliminary study

Background

In a previous study, mothers' stress was demonstrated to affect the stress of their infants. However, stress is a multi-layered concept, and there is a lack of studies on the type of stress that influences infant stress.

Objective

This study examined how various types of mothers' stress influence their infants' stress by measuring stress that emanates from COVID-19, child rearing, and stress levels based on speech and cortisol in saliva.

Methods

This study was conducted in two phases, and the stress of 21 mother-infant dyad were evaluated using questionnaires, participants' saliva, and voice recording.

Results

The results demonstrated that maternal stress increased infant stress, rearing stress decreased infant stress, and COVID-19 stress did not affect infant stress. Furthermore, there was no relationship between stress measured using questionnaires and stress measured using saliva, indicating that these factors independently affect infant stress.

Conclusion

It is clear that stress is multi-layered and that it is necessary to grasp each of the various stresses and their relationship appropriately.

The effect of swaddling method applied to preterm infants during the aspiration procedure on pain

PURPOSE

The study was carried out to determine the effect of the swaddling method on pain in preterm infants (between 27 and 36 weeks) hospitalized in the Neonatal Intensive Care Unit during the aspiration procedure. Preterm infants were recruited by convenience sampling from level III neonatal intensive care units in a city in Turkey.

METHOD

The study was conducted in a randomized controlled trial manner. The study consisted of preterm infants (n = 70) receiving care or treatment at a neonatal intensive care unit. While swaddling was applied to the infants in the experimental group before the aspiration process. The pain was assessed before, during, and after the nasal aspiration using the Premature Infant Pain Profile.

RESULTS

No significant difference was found in terms of pre-procedural pain scores whereas a statistically significant difference was detected in terms of pain scores during and after the procedure between the groups.

CONCLUSION

It was determined in the study that the swaddling method reduced the pain of the preterm infants during the aspiration procedure.

IMPLICATIONS FOR PRACTICE

This study emphasized that swaddling had pain-reducing during the aspiration procedure in the neonatal intensive care unit in preterm infants. It is recommended that future studies be conducted using different invasive procedures in preterm infants born earlier.

A Cross-Cultural Adaptation and Content Validity of COMFORTneo Scale into Brazilian Portuguese

CONTEXT

The instrument used to assess neonatal pain must be adequate regarding the type of pain, population, country, and language to provide the best evidence-based clinical strategies; however, few neonatal pain instruments have been translated and validated for the Brazilian population.

OBJECTIVE

The aim was to perform a cross-cultural adaptation of the COMFORTneo scale into Brazilian Portuguese and to evaluate the content validity of the adapted scale.

METHODS

The cross-cultural adaptation process followed six main steps: translation, synthesis of the translations, back-translation, submission to the expert committee, final version pretest, being that 65 individuals participated in this stage, including both healthcare professionals and students, and submission to the committee for process appraisal. Additionally, an equivalence form composed of a four-point Likert scale was sent to each committee participant to calculate the content validity index (CVI). The CVI was obtained as the sum of the items ranked as three or four by the experts divided by the total number of experts.

RESULTS

No difficulties were reported in the production of translated versions. The CVI for the final version of the translated instrument was 0.99. The final version was reviewed to correct any possible grammatical errors. The layout was modified as necessary, and instructions on scale scoring were added to facilitate the application, resulting in the COMFORTneo Brazil scale.

CONCLUSION

The COMFORTneo scale was properly and cross-culturally adapted into Brazilian Portuguese, reaching semantic, idiomatic, experimental, and conceptual equivalence with the original instrument, and a good CVI.

The Effect of Vibration on Pain During Heel Lance Procedures in Newborns: A Randomized Controlled Trial

BACKGROUND/SIGNIFICANCE

The pain-reducing effect of applying vibration, which is used as a nonpharmacological method in pain management, is explained by the gate control theory developed by Melzack and Wall. Studies that are based on this theory have shown similar results to those of Melzack and Wall, indicating that pain-transmitting nerves are suppressed by vibrations, leading to higher pain thresholds.

PURPOSE

The study aimed to evaluate the effect of applying vibration to manage pain during heel lance procedures in newborns.

METHODS

This is a randomized, controlled experimental study. The study sample included 56 newborns determined using power analysis (vibration group = 28; control group = 28). For those in the vibration group, a vibrating device was used for approximately 30 seconds before the heel lance procedure and then continued throughout the procedure. No interventions were provided to the newborns in the control group. Pain in the newborns was evaluated by the nurse who performed the heel lance procedures, before the procedures and 15 to 20 seconds and 5 minutes after procedures, and by 2 specialists who viewed the video footage and conducted the Neonatal Infant Pain Scale examination.

RESULTS

The pain scores were significantly lower at 15 to 20 seconds and 5 minutes after the heel lance procedures in the group that received vibrations than in the control group (P < .05).

IMPLICATIONS FOR PRACTICE

The application of vibration, which is effective, nonpharmacological, and noninvasive, could help nurses manage pain in newborns as a nonpharmacological method.

IMPLICATIONS FOR RESEARCH

The number of studies that examine the effect that vibration has on pain associated with heel lance procedures in newborns is very limited, and it is recommended that further studies be conducted with larger sample sizes.

Fentanyl Exposure in Preterm Infants: Five-Year Neurodevelopmental and Socioemotional Assessment

Objective

To evaluate the association between cumulative fentanyl dose during neonatal intensive care and 5-year neurodevelopmental and socioemotional outcomes in very preterm infants.

Materials and Methods

Patient demographics and clinical factors during the perinatal and neonatal course were collected in 84 patients born between 23- and 30-weeks gestational age (GA). Cumulative fentanyl dose during neonatal intensive care was calculated. Developmental testing at age 5 years included the Wechsler Preschool and Primary Scale of Intelligence Full-Scale Intelligence Quotient, Third Edition, Clinical Evaluation of Language Fundamentals-Preschool, Second Edition, Movement Assessment Battery for Children, Second Edition (MABC-2), and Shape School Assessment. Socioemotional outcomes were assessed via caregiver's responses on the Child Behavior Checklist/1.5-5 (CBCL/1.5-5.5) and Social Responsiveness Scale, Second Edition (SRS-2). Covariates were identified on bivariate analysis (p < 0.1). Linear regression models related outcome measures to the log of cumulative fentanyl dose adjusted for covariates.

Results

Higher cumulative fentanyl dose was associated with lower composite motor scores on bivariate analysis (p < 0.01). Cumulative fentanyl dose did not correlate with composite intelligence quotient, language, or executive function. The Clinical Risk Index for Babies score, log of mechanical ventilation, inotrope, and anesthesia duration, and log of cumulative midazolam and hydrocortisone dose were also associated with MABC-2 scores (p < 0.1). Cumulative fentanyl dose was not associated with composite MABC-2 scores on multiple linear regression. Higher cumulative fentanyl dose was associated with decreased socioemotional problems based on caregiver's response on CBCL/1.5-5.5 t-scores driven by fewer symptoms of depression. The McMaster Family Assessment Device general functioning scale score, maternal age, GA, log of total parenteral nutrition days, patent ductus arteriosus requiring treatment, and log of inotrope hours were also associated with CBCL/1.5-5.5 t-scores (p < 0.1). Cumulative fentanyl dose (p = 0.039) and family dysfunction score (p = 0.002) remained significant after controlling for covariates on multiple linear regression.

Conclusion

Cumulative fentanyl dose during neonatal intensive care did not correlate with 5-year motor, cognitive, or language outcomes after controlling for other variables. Fentanyl dose was associated with caregiver reported total socioemotional problems on the CBCL/1.5-5.5 on multivariate modeling. Additional long-term studies are needed to fully elucidate the safety of fentanyl in very preterm neonates.

The Effect of 3 Positions Given to Preterm Infants During Heelstick Procedure on Pain and Durations of Crying and Procedure

The purpose of this randomized controlled study was to determine the effect of 3 positions given to preterm infant during heelstick procedure on the pain and durations of crying and procedure. The sample of the study consisted of 90 preterm infants (30 in each group). The heelstick procedure was video recorded. Data from the pain scores, durations of crying, and procedure were collected watching the video recordings. It was determined that the pain mean score of the infants in the control group (supine on the crib) (5.50 ± 2.13) was statistically significantly higher than that of the infants in the positions of upright (3.00 ± 2.17) and supine on the lap (3.20 ± 2.46) (P < .01), and there was no difference between the positions of upright and supine on the lap (P > .05). Giving the positions of upright or supine on the lap during heelstick is effective in reducing pain, shortening the duration of crying, and calming down the infant. Heelstick in the position of upright on the lap shortened the procedure duration and allowed the infants to be subjected to less painful procedure. It is recommended for nurses to take the preterm infants on their laps during heel lancing and give them the upright position, in particular.

Less invasive surfactant administration is associated with a higher need for nonpharmacological pain-relieving interventions compared to the intubation-surfactant extubation technique in preterm infants

Aim

LISA is a promising method in improving preterm outcome. The aim of this study was to assess whether the INSURE (intubation-surfactant extubation) technique or LISA (less invasive surfactant administration) procedure for surfactant administration is associated with more pain-relieving interventions after the intervention in preterm infants.

Methods

Preterm infants born at <32 weeks gestational age admitted to the Neonatal Intensive Care Unit of Innsbruck University hospital between Jan 2012 and June 2017 subjected to INSURE or LISA were included in the study, which was performed as a retrospective analysis of routinely collected data. Pain assessments were made bedside using the Bernese Pain Scale for Neonates.

Results

During the study period 15 preterm infants (median gestational age 30.7 weeks; range: 25.9-32.0 weeks) were subjected to INSURE technique and 59 (median gestational age 29.4 weeks; range: 25.1-31.4 weeks) to LISA. Infants subjected to LISA showed a higher need for nonpharmacological pain-relieving interventions in the first three days of life.

Conclusion

LISA procedure compared to INSURE technique was associated with a higher need for pain-relieving interventions in the first three days of life. Prospective randomized controlled trials are needed to optimize this less invasive method for surfactant application with special focus on pain in neonates.

The use and reporting of neonatal pain scales: a systematic review of randomized trials

ABSTRACT

The burden of pain in newborn infants has been investigated in numerous studies, but little is known about the appropriateness of the use of pain scales according to the specific type of pain or infant condition. This systematic review aimed to evaluate the reporting of neonatal pain scales in randomized trials. A systematic search up to March 2019 was performed in Embase, PubMed, PsycINFO, CINAHL, Cochrane Library, Scopus, and Luxid. Randomized and quasirandomized trials reporting neonatal pain scales were included. Screening of the studies for inclusion, data extraction, and quality assessment was performed independently by 2 researchers. Of 3718 trials found, 352 with 29,137 infants and 22 published pain scales were included. Most studies (92%) concerned procedural pain, where the most frequently used pain scales were the Premature Infant Pain Profile or Premature Infant Pain Profile-Revised (48%), followed by the Neonatal Infant Pain Scale (23%). Although the Neonatal Infant Pain Scale is validated only for acute pain, it was also the second most used scale for ongoing and postoperative pain (21%). Only in a third of the trials, blinding for those performing the pain assessment was described. In 55 studies (16%), pain scales that were used lacked validation for the specific neonatal population or type of pain. Six validated pain scales were used in 90% of all trials, although not always in the correct population or type of pain. Depending on the type of pain and population of infants included in a study, appropriate scales should be selected. The inappropriate use raises serious concerns about research ethics and use of resources.

Pain Control with Lavender Oil in Premature Infants: A Double-Blind Randomized Controlled Study

Objectives: Aromatherapy has become popular in pain control in recent years compared with other complementary methods. Lavender (Lavandula angustifolia Miller) is a fragrant essential oil used in aromatherapy for its antibacterial, antifungal, muscle-relaxing, and analgesic effects. The smell of lavender oil, known for its soothing effect on adults, has not been adequately investigated in regards to pain control in premature infants. The purpose of our study was to assign the effect of the scent of lavender oil on pain in preterm infants during heel lancing. Design: A double-blind randomized controlled clinical study. Settings/Location: The study was conducted in a third-level neonatal intensive care unit of Bezmialem Vakif University Hospital from March 2019 to November 2019. It consisted of two groups. Subjects: Sixty-one premature babies (24-37 weeks of gestation) were enrolled in the study. Interventions: Heel stick sampling for metabolic screening was used for both study groups. The interventions were performed by two experienced nurses. Heart rate, oxygen saturation, and the baby's facial expression were recorded by a camera 3 min before the intervention, during the sampling, and 3 min after the procedure. After collecting the data, the head researcher and the assistant researcher separately watched the videos and scored them by using the Premature Infant Pain Profile-Revised (PIPP-R). Outcome measures: The difference of pain scores (PIIP-R) between two groups. Results: There was a statistically significant difference between the two groups in terms of PIPP-R scores during and after the sampling (p = 0.008 and p = 0.03 respectively). The PIPP-R scores at the beginning of the procedure were not found to be significantly different between the groups (p > 0.05). Conclusions: Inhalation of lavender scent is effective in pain control in premature infants. It is safe and low cost; it does not interfere with medical care.

EFFECTS OF HAMMOCK POSITIONING ON CLINICAL PARAMETERS IN PRETERM INFANTS ADMITTED TO A NEONATAL INTENSIVE CARE UNIT: A SYSTEMATIC REVIEW

Objective:

To review the effects of the hammock positioning on clinical parameters of preterm newborn infants (PTNB) admitted to the Neonatal Intensive Care Unit (NICU).

Data sources:

This was a systematic review performed by searching the Pubmed, Lilacs, SciELO and PEDro databases. Intervention studies in English, Portuguese and Spanish that evaluated the effects of hammock positioning on clinical parameters of PTNB admitted to the NICU were selected. Three search strategies were used: 1) hammock positioning OR patient positioning AND intensive care units AND infant, newborn; 2) hammock positioning OR patient positioning AND intensive care units; 3) hammock positioning OR patient positioning AND intensive care units, neonatal. There was no restriction on the year of publication of the articles. Methodological quality was assessed by the PEDro scale.

Data synthesis:

Among 597 articles, only six were included and 139 neonates with gestational ages between 26 and 37 weeks and an average gestational weight <2240g were analyzed. Four studies included patients without any associated pathology and most of them placed the PTNB supine in hammock positioning. The duration of the intervention ranged from 15 to 180 minutes and most applied it at just one moment. There was an improvement in heart rate (HR), respiratory rate (RR) and pain (3/4 studies), as well as gains in peripheral oxygen saturation (SpO2) (2/4 studies). Only one study reported worsening of SpO2 with the intervention. The methodological quality of the studies was classified as low.

Conclusions:

Although this review suggests improvement with hammock positioning in HR, RR and pain in PTNB, the low methodological quality makes the results inconsistent.

Multimodal spatio-temporal deep learning approach for neonatal postoperative pain assessment

The current practice for assessing neonatal postoperative pain relies on bedside caregivers. This practice is subjective, inconsistent, slow, and discontinuous. To develop a reliable medical interpretation, several automated approaches have been proposed to enhance the current practice. These approaches are unimodal and focus mainly on assessing neonatal procedural (acute) pain. As pain is a multimodal emotion that is often expressed through multiple modalities, the multimodal assessment of pain is necessary especially in case of postoperative (acute prolonged) pain. Additionally, spatio-temporal analysis is more stable over time and has been proven to be highly effective at minimizing misclassification errors. In this paper, we present a novel multimodal spatio-temporal approach that integrates visual and vocal signals and uses them for assessing neonatal postoperative pain. We conduct comprehensive experiments to investigate the effectiveness of the proposed approach. We compare the performance of the multimodal and unimodal postoperative pain assessment, and measure the impact of temporal information integration. The experimental results, on a real-world dataset, show that the proposed multimodal spatio-temporal approach achieves the highest AUC (0.87) and accuracy (79%), which are on average 6.67% and 6.33% higher than unimodal approaches. The results also show that the integration of temporal information markedly improves the performance as compared to the non-temporal approach as it captures changes in the pain dynamic. These results demonstrate that the proposed approach can be used as a viable alternative to manual assessment, which would tread a path toward fully automated pain monitoring in clinical settings, point-of-care testing, and homes.

New techniques, new challenges—The dilemma of pain management for less invasive surfactant administration?

Recent years have seen the increasing use of noninvasive respiratory support in preterm infants with the aim of minimizing the risk of mechanical ventilation and subsequent bronchopulmonary dysplasia. Respiratory distress syndrome is the most common respiratory diagnosis in preterm infants, and is best treated by administration of surfactant. Until recently, this has been performed via an endotracheal tube using premedication, which has often included opiate analgesia; subsequently, the infant has been ventilated. Avoidance of mechanical ventilation, however, does not negate the need for surfactant therapy. Less invasive surfactant administration (LISA) in spontaneously breathing infants is increasing in popularity, and appears to have beneficial effects. However, laryngoscopy is necessary, which carries adverse effects and is painful for the infant. Conventional methods of premedication for intubation tend to reduce respiratory drive, which increases the likelihood of ventilation being required. This has led to intense debate about the best strategy for providing appropriate treatment, taking into account both the respiratory needs of the infant and the need to alleviate procedural pain. Currently, clinical practice varies considerably and there is no consensus with respect to optimal management. This review seeks to summarize the benefits, risks, and challenges associated with this new approach.

A More Comfortable Method of Skin Prick Testing in Children Ages 0-2 to Decrease Symptoms of Pain

BACKGROUND

Skin prick testing (SPT) is the best initial diagnostic method for individuals of all ages who have potential allergies.

AIM

We aimed to investigate if recent breastfeeding has any effect on reducing the pain of children before SPT.

DESIGN

Prospective, randomized, single-blinded study.

SETTINGS

Academic hospital specialized in pediatrics.

PARTICIPANTS/SUBJECTS

Sixty-four out of seventy-five children requiring SPT within ages 0-2 were included.

METHODS

All participants in this study were breastfed children, and that group assignment randomized them to the control group (n = 32) if children breastfed 30-90 min. prior to arriving for SPT, and study group of children (n = 32) who were also breastfed 30-90 minutes prior to arriving for SPT who were then breastfed again just prior to the beginning of the SPT. The FLACC pain scale was used to test the sensitivity of all children for pain before, during, and 15 minutes after the SPT. The effect of breastfeeding on the pain score and the duration of crying were compared among groups.

RESULTS

Both groups were similar according to age, gender, and other socio-demographic characteristics (p > .05). The percentage of children that cried during SPT was significantly higher in the control group than the study group (p = .002). The FLACC pain scale values were significantly lower in the study group (p < .001).

CONCLUSION

Recent breastfeeding before SPT is correlated with less crying by possibly reducing the perceived pain of children ages 0-2.

Preparing Nurses for Palliative Care in the NICU

BACKGROUND

Neonatal intensive care unit (NICU) nurses require knowledge and skill to meet the unique needs of infants and families. Increasingly, principles of palliative care are being integrated into the NICU setting to improve the quality of care.

PURPOSE

The purpose of this article is to describe the efforts of the End-of-Life Nursing Education Consortium (ELNEC) project and its Pediatric Curriculum, which began in 2003 to provide this education, and to also describe efforts by nurses to implement the training into their practice settings.

METHODS

The ELNEC Pediatric Palliative Care (ELNEC-PPC) project is a train-the-trainer educational program and evidence-based curriculum.

FINDINGS/RESULTS

Participants attend a course or receive online training and then apply the education to implement improved practices in areas such as symptom management, care at the time of death, and bereavement support for families.

IMPLICATIONS FOR RESEARCH

Experiences with ELNEC-PPC have demonstrated that nurses can implement the curriculum to improve care.

IMPLICATIONS FOR PRACTICE

Continued attention to palliative care in this setting is needed, and future research is needed to evaluate the outcomes of this education and practice change.

Prophylactic low-dose paracetamol administration associated with lowered rate of patent ductus arteriosus in preterm infants - Impact on outcome and pain perception

BACKGROUND

To determine the rate of patent ductus arteriosus after prophylactic low-dose paracetamol administration, the impact on outcome parameters, possible treatment side-effects and the influence on pain perception.

METHODS

We report retrospective single-centre outcome data of premature infants ≤ 32 weeks of gestation (n = 476). The intervention group received intravenous paracetamol, the control group obtained no preventive therapy. Ductal closure rate and outcome parameters were compared between the two groups. Adverse effects were determined by laboratory parameters. For the assessment of pain the Bernese Pain Scale for Neonates was used.

RESULTS

The rate of patent ductus arteriosus was significantly lower in the paracetamol-treated group compared to the control group (13.6% vs. 38.2%, p < 0.001). With regard to secondary outcome parameters, severe and moderate bronchopulmonary dysplasia (2.7% vs. 7.4%, p = 0.023), severe retinopathy of prematurity (0% vs. 4.4%, p = 0.002) and late onset sepsis (2.7% vs. 8.3%, p = 0.009) were significantly less frequent in the paracetamol group. Except for a 1.5-fold increased risk for hyperbilirubinemia (86.0% vs. 77.6%, p = 0.035) in the paracetamol group following treatment, no significant differences in laboratory parameters were found. Relating to pain, the administration of Glucose 33% was significantly more often necessary in the control group compared to the paracetamol-treated group (mean 13.48 vs. 8.71, p < 0.001), just as the need for additional treatment with systemic analgesics, which was more frequent in the control group (mean 0.72 vs. 0.57, p = 0.361).

CONCLUSION

In our study we were able to show a significantly lower rate of patent ductus arteriosus after prophylactic paracetamol administration without serious adverse effect, but a beneficial influence of this regime on the patient's pain perception.

Culturally Based Practice in Neonatal Procedural Pain Management: A Mini Review

Cultural factors have gradually become important considerations in health services, including in pain management for adult and pediatric patients. However, research on culturally based pain management in neonates remains limited. This mini review aims to provide an overview of procedural pain management in neonates based on cultural approaches from various countries. The review found that there are several analyses of pain management procedures for neonates developed from cultural practices, namely, acupuncture, foot massage and reflexology, Yakson touch therapy, and aromatherapy. The acupuncture method (invasive and non-invasive) is more widely studied using randomized controlled trials (RCTs) than the other methods because the techniques applied can be standardized and measured. There are indications of the positive impact of all the methods examined in this review, but the results of studies have not been consistent because of the diversity of outcome measurement methods used and because of the difficulty of creating standardized procedures to measure pain management methods that are based on cultural practices.

Comparing pain control using oral acetaminophen versus dorsal penile block in neonatal circumcision

Background

Circumcision is one of the commonest surgical procedures performed yet the most controversial worldwide. Although various reasons have been suggested in support of circumcision, the pain and stress that accompany it on both neonates and mothers are factors against the procedure. This study compared pain control using oral acetaminophen syrup versus 1% lidocaine injection given as dorsal penile block during neonatal circumcision.

Results

There were 191 neonates in group A and 195 in group B. The mean age at circumcision was 23.71 (SD ± 20.39) days, and mean weight was 3.33 (SD ± 0.74) kg. The mean pain scores for group A immediately and 1 h after circumcision were 4.26 (SD ± 2.48) and 0.37 (SD ± 1.35), respectively. In group B, the mean pain scores immediately and 1 h after circumcision were 3.31 (SD ± 2.59) and 0.35 (SD ± 1.19), respectively.

Conclusion

Penile block gives better pain control in comparison with oral acetaminophen syrup, but both agents are effective and can be combined to provide a long-lasting perioperative anaesthesia and analgesia for circumcision in the hospital setting.

Pain in Neonates: A Concept Analysis

Context

The term pain in neonates is emerged in recent decades. However, studies on pain in neonates are still limited and have various indicators. In addition, the term pain still often overlaps with stress in various studies and clinical circumstances. The concepts of pain and stress in the neonates need to be clarified to be better understood and then applied to improve neonates’ quality of life. Therefore, the current study aimed at clarifying the concept of pain in neonates.

Evidence Acquisition

The current study employed the concept analysis approach developed by Walker and Avant. The authors reviewed articles from JSTOR, ScienceDirect, Proquest, Sage, Cochrane, and Springer databases from 1980 to 2016 using keywords pain, stress, neonatal, neonates, and quality of life.

Results

Pain had attributes such as tissue damage, physiological changes, metabolic changes, and behavioral changes. Stress had attributes such as physiological changes, metabolic changes, and behavioral changes.

Conclusions

Attributes of pain and stress have similarities and differences. The main difference is the stimulus that induces a response. Pain has an attribute of tissue damage, whereas stress is not always due to tissue damage. The attributes of physical, metabolic, and behavioral changes between pain and stress are similar.

Doctors and Nurses' Knowledge and Attitudes Towards Pediatric Pain Management: An Exploratory Survey in a Children's Hospital

Despite the existence of protocols for effective pain control, pediatric pain is still high, due to scarce knowledge of its treatment, especially regarding opioids. This study aimed to evaluate doctors and nurses' knowledge of pain treatment and the use of opioids in children, before and after the implementation of Law 38/2010, that represented an important step in guaranteeing patients' rights to gain access to appropriate services for pain control and palliative care in Italy and in establishing the obligation of specific training programs in this matter for health professionals. An ad hoc questionnaire was developed and administered before (investigation A) and after (investigation B) the issuance of the Law. In B both doctors and nurses showed a slight but significant increase in correct answers and a reduction in incorrect ones, mainly concerning the category Myths and Prejudices. In both investigations doctors and nurses showed adequate general knowledge, yet there were some gaps regarding the specific knowledge of opioid drugs. Most of the participants were not familiar with the Law and its provisions.Investigation B showed an improvement in health professionals' knowledge, perhaps due to a hospital environment that followed the provisions of Law 38/2010. Nevertheless, the establishment of training courses according to the Law is needed to improve the knowledge of opioids, as well as to dispel deeply rooted myths and prejudices on pediatric pain.

Gabapentin Use for Hospitalized Neonates

BACKGROUND

Despite some clinician advocacy for the use of gabapentin to treat neonatal irritability of presumed neurological origin, the extent of gabapentin administration to hospitalized neonates is unknown. We aimed to identify trends in gabapentin utilization among infants hospitalized in neonatal intensive care units (NICUs) across the United States and to evaluate the associations between clinical diagnoses and gabapentin treatment.

METHODS

We analyzed neonates admitted to the NICU using the Pediatric Health Information System (2005 to 2016) to measure treatment timing, duration, and frequency. We used modified Poisson regression with a robust between-cluster variance estimator to calculate a probability (adjusted relative risk) for gabapentin administration.

RESULTS

Of 278,403 neonates, 374 were administered gabapentin (0.13%). The median treatment duration was 16 days (25th to 75th percentile: 8; 40). Gabapentin use increased from 0% in 2005 to 0.39% in 2016. Treatment was prescribed to neonates at 31 of 48 studied hospitals; 73% of total treated infants localized to five neonatal intensive care units. Term (0.16%) and ≤28 weeks' gestation preterm infants (0.22%) were most likely to receive gabapentin. Varying by gestational age, a diagnosis of chromosomal abnormalities, severe bronchopulmonary dysplasia, hemorrhagic stroke, and neonatal abstinence syndrome were associated with higher treatment with gabapentin. The majority (88.8%) of treated infants did not have a seizure diagnosis.

CONCLUSION

Gabapentin use in NICU in the United States increased in recent years and varies markedly between institutions. Term infants, ≤28 weeks' gestation preterm infants, and neonates with chronic genetic, neurological, and gastrointestinal diagnoses were more likely to receive gabapentin.

Cultural adaptation and harmonization of four Nordic translations of the revised Premature Infant Pain Profile (PIPP-R)

Background

Preterm infants are especially vulnerable to pain. The intensive treatment often necessary for their survival unfortunately includes many painful interventions and procedures. Untreated pain can lead to both short- and long-term negative effects. The challenge of accurately detecting pain has been cited as a major reason for lack of pain management in these non-verbal patients. The Premature Infant Pain Profile (PIPP) is one of the most extensively validated measures for assessing procedural pain in premature infants. A revised version, PIPP-R, was recently published and is reported to be more user-friendly and precise than the original version. The aims of the study were to develop translated versions of the PIPP-R in Finnish, Icelandic, Norwegian, and Swedish languages, and to establish their content validity through a cultural adaptation process using cognitive interviews.

Methods

PIPP-R was translated using the recommendations from the International Society for Pharmacoeconomics and Outcomes Research and enhanced with cognitive interviews. The respondent nurse was given a copy of the translated, national version of the measure and used this together with a text describing the infant in the film to assess the pain of an infant in a short film. During the assessment the nurse was asked to verbalize her thought process (thinking aloud) and upon completion the interviewer administered probing questions (verbal probing) from a structured interview guide. The interviews were recorded, transcribed, and analyzed using a structured matrix approach.

Results

The systematic approach resulted in translated and culturally adapted versions of PIPP-R in the Finnish, Icelandic, Norwegian and Swedish languages. During the cultural adaptation process several problems were discovered regarding how the respondent understood and utilized the measure. The problems were either measure problems or other problems. Measure problems were solved by a change in the translated versions of the measure, while for other problems different solutions such as education or training were suggested.

Conclusions

This study have resulted in translations of the PIPP-R that have content validity, high degree of clinical utility and displayed beginning equivalence with each other and the original version of the measure.

Evaluation of prolonged pain in preterm infants with pneumothorax using heart rate variability analysis and EDIN (Échelle Douleur Inconfort Nouveau-Né, neonatal pain and discomfort scale) scores

Purpose

The EDIN scale (Échelle Douleur Inconfort Nouveau-Né, neonatal pain and discomfort scale) and heart rate variability has been used for the evaluation of prolonged pain. The aim of our study was to assess the value of the newborn infant parasympathetic evaluation (NIPE) index and EDIN scale for the evaluation of prolonged pain in preterm infants with chest tube placement due to pneumothorax.

Methods

This prospective observational study assessed prolonged pain in preterm infants with a gestational age between 33 and 35 weeks undergoing installation of chest tubes. Prolonged pain was assessed using the EDIN scale and NIPE index.

Results

There was a significant correlation between the EDIN scale and NIPE index (r=-0.590, P=0.003). Prolonged pain is significantly more severe in the first 6 hours following chest tube installation (NIPE index: 60 [50–86] vs. 68 [45–89], P<0.002; EDIN score: 8 [7–11] vs. 6 [4–8], P<0.001).

Conclusion

Prolonged pain can be accurately assessed with the EDIN scale and NIPE index. However, evaluation with the EDIN scale is time-consuming. The NIPE index can provide instantaneous assessment of prolonged and continuous pain.

Paradoxical Reaction to Midazolam in Preterm Neonates: A Case Series

Midazolam is a drug belonging to the benzodiazepine group and is used commonly for seizure control as well as preoperative and procedure-related sedation in neonates. Many adverse effects of midazolam have been reported in the past. Paradoxical stimulation of the central nervous system such as restlessness, nightmare, and hallucinations as well as hypomanic behavior has been reported in adults and children. Seizure is a rare adverse effect of midazolam. Cases of myoclonic movements associated with midazolam have been published worldwide; however, none so far have been reported from India. We report two newborns in our Neonatal Unit, who developed myoclonic seizure after the administration of midazolam. Both of these neonates were preterm, require multiple invasive and noninvasive investigations also leads to parent and clinician stress.

[Pain therapy for premature babies and neonates]

Pain is a central topic on neonatal intensive care units (NICU). Acute as well as prolonged (continuous and chronic) pain frequently occurs. Due to a lack of validated physiological measurement instruments for pain (e. g. saliva cortisol, skin conductance and heart rate variability) pain in neonatology can only be assessed by external observation through the bedside team with pain scores using a regular, standardized procedure. During this very vulnerable period pain and medications (analgesics/sedatives) can negatively influence the brain development of premature babies and neonates. Therefore, limitation of the number of pain stimuli and the medicinal guideline "as much as necessary but as little as possible" are eminently important. When dealing with prolonged (continuous and chronic) pain, further challenges are a reduction of analgesics and sedatives as well as avoidance of withdrawal symptoms.

Effects of hammock positioning in behavioral status, vital signs, and pain in preterms: a case series study

BACKGROUND

The hammock positioning within the incubators simulates the intrauterine environment, however, there is little evidence of its benefits and possible risks.

OBJECTIVES

The aim of this study was to assess the effects of hammock positioning on behavioral status, vital signs, and pain in very low birth weight preterm newborns.

METHODS

This is a quasi-experimental/case series study in which premature infants (<1500g) were positioned in supine for one hour in a hammock. The preterm newborns were assessed 10min before, during (2, 20, 40, and 60min), and 10min after hammock positioning with the Brazelton Neonatal Behavioral Assessment Scale, vital signs and pain by the Neonatal Facial Coding System.

RESULTS

28 preterm infants between 28 and 36 weeks of gestational age were evaluated. Regarding the behavioral state, the preterm newborns progressively evolved to light or deep sleep during hammock positioning. There was a statistically significant reduction of the heart and respiratory rate from 2 to 60th minute in a hammock, which was maintained after the positioning. The oxygen saturation remained within normal values. No changes in pain scores were observed.

CONCLUSION

The hammock positioning can be considered a safe method of positioning that can be used to reduce the stress levels in very low birth weight preterm newborns. We did not observe worsening in either pain or vital signs.

Sex-dependent effects of early life inflammatory pain on sucrose intake and sucrose-associated hippocampal Arc expression in adult rats

We hypothesize that dorsal hippocampal (dHC) neurons, which are critical for episodic memory, form a memory of a meal and inhibit the initiation of the next meal and the amount ingested during that meal. In support, we showed previously that (1) consuming a sucrose meal induces expression of the synaptic plasticity marker activity-regulated cytoskeleton-associated protein (Arc) in dHC neurons and (2) reversible inactivation of these neurons immediately following a sucrose meal accelerates the onset of the next meal and increases the size of that meal. These data suggest that hippocampal-dependent memory inhibits intake; therefore, the following experiments were conducted to determine whether hippocampal-dependent memory impairments are associated with increased intake. We reported recently that one episode of early life inflammatory pain impairs dHC-dependent memory in adult rats. The present study determined whether neonatal inflammatory pain also increases sucrose intake and attenuates sucrose-associated Arc expression. Male and female Sprague-Dawley rats were given an intraplantar injection of the inflammatory agent carrageenan (1%) on the day of birth and sucrose intake and sucrose-associated dHC Arc expression were measured in adulthood. Neonatal inflammatory pain increased sucrose intake in adult female and male rats, decreased sucrose-associated dHC Arc expression in female rats, and tended to have a similar effect on Arc expression in male rats. Neonatal inflammatory pain significantly decreased the interval between two sucrose meals in female but not in male rats. Morphine administration at the time of insult attenuated the effects of injury on sucrose intake. Collectively, these findings indicate that one brief episode of inflammatory pain on the day of birth has a long long-lasting, sex-dependent impact on intake of a palatable food in adulthood.

Neonatal pain management: still in search for the Holy Grail

Inadequate pain management but also inappropriate use of analgesics in early infancy has negative effects on neurodevelopmental outcome. As a consequence, neonatal pain management is still in search for the Holy Grail. At best, effective pain management is based on prevention, assessment, and treatment followed by a re-assessment of the pain to determine if additional treatment is still necessary. Unfortunately, epidemiological observations suggest that neonates are undergoing painful procedures very frequently, unveiling the need for effective preventive, non-pharmacological strategies. In addition, assessment is still based on validated, multimodal, but subjective pain assessment tools. Finally, in neonatal intensive care units, there is a shift in clinical practices (e.g., shorter intubation and ventilation), and this necessitates the development and validation of new pharmacological treatment modalities. To illustrate this, a shift in the use of opioids to paracetamol has occurred and short-acting agents (remifentanil, propofol) are more commonly administered to neonates. In addition to these new modalities and as part of a more advanced approach of the developmental pharmacology of analgesics, pharmacogenetics also emerged as a tool for precision medicine in neonates. To assure further improvement of neonatal pain management the integration of pharmacogenetics with the usual covariates like weight, age and/or disease characteristics is needed.

Oral Sucrose for Pain in Neonates During Echocardiography: A Randomized Controlled Trial

OBJECTIVE

To test the efficacy of oral sucrose in reducing pain/stress during echocardiography as estimated by Premature Infant Pain Profile score.

DESIGN

Double-blind, parallel-group, randomized control trial.

SETTING

Tertiary-care neonatal care unit located in Western India.

PARTICIPANTS

Neonates with established enteral feeding, not on any respiratory support and with gestational age between 32 and 42 weeks requiring echocardiography.

INTERVENTIONS

Neonates in intervention group received oral sucrose prior to echocardiography.

MAIN OUTCOME MEASURES

Assessment was done using Premature Infant Pain Profile score.

RESULTS

There were 104 examinations; 52 in each group. Baseline characteristics like mean gestational age (37.6 vs. 37.1), birth weight (2.20 vs. 2.08), and feeding status (Breastfeeding- 59.6% vs. 44.2%, paladai feeding- 13.5% vs. 13.5%, and gavage feeding- 26.9% vs. 42.3%) were comparable. The mean (SD) premature infant pain profile score was significantly higher in control group [(7.4 (3.78) vs. 5.2 (1.92), P <0.001].

CONCLUSION

Oral sucrose significantly reduces pain, and is safe to administer to neonates.

Missed Opportunities for Sedation and Pain Management at a Level III Neonatal Intensive Care Unit, India

BACKGROUND

Neonates in the neonatal intensive care unit (NICU) undergo a multitude of painful and stressful procedures during the first days of life. Stress from this pain can lead to neurodevelopmental problems that manifest in later childhood and should be prevented.

OBJECTIVE

To determine the number of painful procedures performed per day for each neonate, to verify documentation of painful procedures performed, and to, subsequently, note missed opportunities for providing pain relief to neonates.

METHODS

We conducted a cross-sectional study at a level III NICU located in a rural part of western India. A total of 69 neonates admitted for more than 24 h were included. Twenty-nine neonates were directly observed for a total of 24 h each, and another 40 neonatal records were retrospectively reviewed for the neonate's first 7 days of admission. All stressful and painful procedures performed on the neonate were recorded. Also recorded were any pharmaceutical pain relief agents or central nervous system depressants administered to the neonate before or at the time of the procedures. Average nurse-patient ratio was also calculated. Data were analyzed using descriptive statistics.

RESULTS

A documentation deficit of 2.2% was observed. The average nurse-patient ratio was 1.53:1. A total of 13711 procedures were recorded, yielding 44.1 (38.1 stressful, 3.8 mildly painful, and 2.2 moderately painful) procedures per patient day. Common stressful procedures were position changing (2501) and temperature recording (2208). Common mildly and moderately painful procedures were heel prick (757) and endotracheal suctioning (526), respectively. Use of pharmacological agents coincided with 33.48% of the procedures. The choice of drug and time of administration were inappropriate, indicating that the pharmacological agents were intended not for pain relief but rather for a coexisting pathology or as sedation from ventilation with no analgesia.

CONCLUSION

Stressful procedures are common in the NICU; mildly and moderately painful procedures fairly common. Almost two-thirds of the times, no pharmaceutical pain relief methods were used, and when administered, the pharmaceutical agents were seldom intended for pain relief; this implies poor pain management practices and emphasizes the imperative need for educating NICU nurses, residents, fellows, and attendings.

[Non-pharmaceutical measures, topical analgesics and oral administration of glucose in pain management: Austrian interdisciplinary recommendations on pediatric perioperative pain management]

Non-pharmaceutical procedures are increasingly being used in pediatric pain therapy in addition to pharmaceutical procedures and have a supporting function. This article describes the non-pharmaceutical procedures which have an influence on perioperative and posttraumatic pain in children and adolescents. Prerequisites for every adequate pain therapy are affection, imparting a feeling of security, distraction and the creation of a child-oriented environment. Topical analgesics are indicated for application to intact skin for surface anesthesia. For a safe use consideration must be given to the duration of application, the dose and the maximum area of skin treated in an age-dependent manner. For simple but painful procedures in premature infants, neonates and infants, pain can be effectively reduced by the oral administration of glucose. The positive effect is guaranteed particularly for the use in a once only pain stimulation. Non-nutritive sucking, swaddling, facilitated tucking and kangaroo mother care, for example can be used as supportive measures during slightly painful procedures. There is insufficient evidence for a pain reducing effect in older infants and small children. Physical therapeutic procedures can be used as accompanying measures for acute pain and are individually adapted. However, the limited amount of currently available data is insufficient to make a critical scientific assessment of the individual measures. The effects can, however, be observed in the daily routine practice. Psychological methods can facilitate coping with pain. In situations with mental and psychiatric comorbidities or psychosocial impairment, a psychologist should be consulted. Acupuncture and hypnosis are also a meaningful addition within the framework of multimodal pain therapy.

Neuroimmune mechanisms of stress: sex differences, developmental plasticity, and implications for pharmacotherapy of stress-related disease

The last decade has witnessed profound growth in studies examining the role of fundamental neuroimmune processes as key mechanisms that might form a natural bridge between normal physiology and pathological outcomes. Rooted in core concepts from psychoneuroimmunology, this review utilizes a succinct, exemplar-driven approach of several model systems that contribute significantly to our knowledge of the mechanisms by which neuroimmune processes interact with stress physiology. Specifically, we review recent evidence showing that (i) stress challenges produce time-dependent and stressor-specific patterns of cytokine/chemokine expression in the CNS; (ii) inflammation-related genes exhibit unique expression profiles in males and females depending upon individual, cooperative or antagonistic interactions between steroid hormone receptors (estrogen and glucocorticoid receptors); (iii) adverse social experiences incurred through repeated social defeat engage a dynamic process of immune cell migration from the bone marrow to brain and prime neuroimmune function and (iv) early developmental exposure to an inflammatory stimulus (carageenin injection into the hindpaw) has a lasting influence on stress reactivity across the lifespan. As such, the present review provides a theoretical framework for understanding the role that neuroimmune mechanisms might play in stress plasticity and pathological outcomes, while at the same time pointing toward features of the individual (sex, developmental experience, stress history) that might ultimately be used for the development of personalized strategies for therapeutic intervention in stress-related pathologies.

Oral glucose solution to alleviate pain induced by intramuscular injections in preterm infants

PURPOSE

The purpose was to assess the effectiveness of 5% oral glucose solution in reducing pain in preterm infants during intramuscular injection.

DESIGN AND METHODS

We conducted a prospective, randomized, controlled, unblinded trial to investigate the effect of glucose solution on the pain of intramuscular injection in preterm infants (N = 80).

RESULTS

Infants who received oral glucose had significantly lower pain scores (p < .001), less crying time (p < .001), higher oxygen saturation (p < .001), and lower heart rate after compared with during the procedure (p = .02).

PRACTICE IMPLICATIONS

Our results suggest that oral glucose, even if used in the lowest dose, may have a pain-relieving effect in preterm infants if administered pre-procedure.

Early life inflammatory pain induces long-lasting deficits in hippocampal-dependent spatial memory in male and female rats

The present experiment tested the hypothesis that neonatal injury disrupts adult hippocampal functioning and that normal aging or chronic stress during adulthood, which are known to have a negative impact on hippocampal function, exacerbate these effects. Male and female Sprague-Dawley rats were given an intraplantar injection of the inflammatory agent carrageenan (1%) on the day of birth and their memory was tested in the hippocampal-dependent spatial water maze in adulthood and again in middle age. We found that neonatal injury impaired hippocampal-dependent memory in adulthood, that the effects of injury on memory were more pronounced in middle-aged male rats, and that chronic stress accelerated the onset of these memory deficits. Neonatal injury also decreased glucocorticoid receptor mRNA in the dorsal CA1 area of middle-aged rats, a brain region critical for spatial memory. Morphine administration at the time of injury completely reversed injury-induced memory deficits, but neonatal morphine treatments in the absence of injury produced significant memory impairments in adulthood. Collectively, these findings are consistent with our hypothesis that neonatal injury produces long-lasting disruption in adult hippocampal functioning.

Is there an alternative to continuous opioid infusion for neonatal pain control? A preliminary report of parent/nurse-controlled analgesia in the neonatal intensive care unit

BACKGROUND

Continuous opioid infusion (COI) remains the mainstay of analgesic therapy in the neonatal intensive care unit (NICU). Parent/nurse-controlled analgesia (PNCA) has been accepted as safe and effective for pediatric patients, but few reports include use in neonates. This study sought to compare outcomes of PNCA and COI in postsurgical neonates and young infants.

METHODS

Twenty infants treated with morphine PNCA were retrospectively compared with 13 infants treated with fentanyl COI in a Midwestern pediatric hospital in the United States. Outcome measures included opioid consumption, pain scores, frequency of adverse events, and subsequent methadone use.

RESULTS

The PNCA group (median 6.4 μg · kg(-1) · h(-1) morphine equivalents, range 0.0-31.4) received significantly less opioid (P < 0.001) than the COI group (median 40.0 μg · kg(-1) · h(-1) morphine equivalents; range 20.0-153.3), across postoperative days 0-3. Average daily pain scores (based on 0-10 scale) were low for both groups, but median scores differed nonetheless (0.8 PNCA vs 0.3 COI, P < 0.05). There was no significant difference in the frequency of adverse events or methadone use.

CONCLUSION

Results suggest PNCA may be a feasible and effective alternative to COI for pain management in postsurgical infants in the NICU. Results also suggest PNCA may provide more individualized care for this vulnerable population and in doing so, may potentially reduce opioid consumption; however, more studies are needed.

Oral dextrose for analgesia in neonates during nasogastric tube insertion: a randomised controlled trial

AIM

This study aims to determine if oral dextrose solution can mitigate the pain response to nasogastric tube (NGT) insertion in neonates.

METHODS

The study was a double-blinded, placebo-controlled, randomised controlled trial. One hundred and fifty consecutive neonates were randomised into three groups to receive 25% dextrose (D25), or 10% dextrose (D10) or placebo (distilled water). An NGT was inserted after giving 2 mL of one of the solutions orally. Pain response was assessed using the Premature Infant Pain Profile (PIPP), and the duration of cry was noted within 60 s of the intervention. Total PIPP score, duration of cry, change in heart rate and oxygen saturation (SpO2 ) were compared among the three groups.

RESULTS

Neonates who received D25 had significantly lesser pain response to NGT insertion in terms of lower PIPP score (P < 0.05) and duration of cry (P = 0.001) compared to D10. There was a significantly smaller increase in heart rate and decrease in SpO2 (P < 0.05). In comparison with placebo, D10 significantly decreased duration of cry (P < 0.05) but not PIPP score.

CONCLUSION

Oral D25 was effective in reducing the pain response during NGT insertion in neonates when compared with oral D10 and placebo. Oral D10 was not found to have a potent analgesic effect for the same.

Association of Fentanyl With Neurodevelopmental Outcomes in Very-Low-Birth-Weight Infants

Background: Opioids are commonly used in the neonatal intensive care unit (NICU). Negative neurodevelopmental effects in the short-term setting have been associated with opioids ; however, long-term studies have been limited. Objective: The primary objective was to determine if there is a dose relationship between fentanyl and neurodevelopmental outcomes, as measured by Bayley Scales of Infant and Toddler Development (Bayley-III) composite scores for language, cognition, and motor skills. Secondary objectives included comparison of Bayley-III scores and neurodevelopmental impairment classification based on fentanyl exposure. Methods: A retrospective evaluation of 147 very-low-birth-weight infants with Bayley-III scores obtained at a chronological age of 6 months to 2 years at clinic follow-up was conducted. Univariate and multivariable linear regression analyses were used to determine if there was a dose-related association between fentanyl and neurodevelopmental outcomes. To evaluate secondary outcomes, patients were divided based on cumulative fentanyl dose (“high-dose” versus “low/no-dose”). Results: The univariate analysis found a statistically significant decrease in cognition ( P = .034) and motor skills scores ( P = .006). No association was found in the multi-variable regression between fentanyl cumulative dose and Bayley-III scores. There was a significant decrease in the motor skills score between the high-dose versus low/no-dose group, 94 ± 20 versus 102 ± 15, respectively ( P = .026); however, no statistical differences were noted for language or cognition scores or neurological impairment classification. Conclusions: When controlling for other variables, the cumulative fentanyl dose did not correlate with neurodevelopmental outcomes. Further evaluation of benefits and risks of opioids in premature infants are needed.

Ergonomic procedure for heel sticks and shots in Kangaroo Care (skin-to-skin) position

Kangaroo Care (KC) has been recommended as a pain-reducing strategy in neonates; however, KC has not been widely used to minimize procedural pain caused in part by nurses'/phlebotomists' discomfort when positioning themselves and the infant for blood drawing and injections. Therefore, an ergonomically designed setup incorporating the use of KC was introduced into clinical practice to facilitate blood draws and injections. The step-by-step procedure used for heel sticks and injections is presented in this manuscript. After implementing the ergonomic step-by-step protocol, complaints of discomfort by nurses and phlebotomists ceased, and an additional benefit was that infant pain responses were significantly reduced.

Pharmacological treatment of neonatal pain: in search of a new equipoise

Inadequate management of pain in early human life contributes to impaired neurodevelopmental outcome and alters pain thresholds, pain or stress-related behavior and physiological responses. However, there are also emerging animal experimental data on the impact of exposure to analgo-sedatives on the incidence and extent of neuro-apoptosis. Since this association has also been suggested in humans, the pharmacological treatment of neonatal pain is in search of a new equipoise since these 'conflicting' observations are the main drivers to further reconsider our current treatment regimens. This review focuses on new data concerning clinical pharmacology of morphine, followed by data on more recently introduced opioids like remifentanil and tramadol, locoregional anesthesia and minimally invasive techniques in neonates, and finally with data on intravenous paracetamol. Since the available data are still incomplete, priorities for both clinical management and future research will be proposed.

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.

Early life adversity as a risk factor for fibromyalgia in later life

The impact of early life events is increasingly becoming apparent, as studies investigate how early childhood can shape long-term physiology and behaviour. Fibromyalgia (FM), which is characterised by increased pain sensitivity and a number of affective co-morbidities, has an unclear etiology. This paper discusses risk factors from early life that may increase the occurrence or severity of FM in later life: pain experience during neonatal life causes long-lasting changes in nociceptive circuitry and increases pain sensitivity in the older organism; premature birth and related stressor exposure cause lasting changes in stress responsivity; maternal deprivation affects anxiety-like behaviours that may be partially mediated by epigenetic modulation of the genome—all these adult phenotypes are strikingly similar to symptoms displayed by FM sufferers. In addition, childhood trauma and exposure to substances of abuse may cause lasting changes in developing neurotransmitter and endocrine circuits that are linked to anxiety and stress responses.