The Potential Role of Preoperative Pain, Catastrophizing, and Differential Gene Expression on Pain Outcomes after Pediatric Spinal Fusion

The impact of spinal fusion of adolescent idiopathic scoliosis in Salah (Islamic Prayer) movement: a retrospective case-control study

BACKGROUND

Corrective spine surgery is widely accepted for treating severe adolescent idiopathic scoliosis (AIS). Postoperative spinal range of motion (ROM) could be affected after such surgery. In certain populations, such as Muslims, this ROM change can impact daily life, as it may affect the five-times-a-day prayer (Salah). This study aims to assess the influence of spinal fusion (SF) in Adolescent Idiopathic Scoliosis (AIS) during the daily Islamic prayer (Salah).

METHODS

SF-AIS patients were videoed while performing Salah prayer. The kinematic documentation was assessed and compared to Salah movements of a control group of age-matched Muslim AIS patients, who had not had surgery. The prayer quality changes were subjectively classified into improved, no change/remained, and worsened, according to the Global Perceived Effect (GPE). Functional outcome and pain were assessed by the Scoliosis Research Society Questionnaire Version 30 (SRS-30).

RESULTS

Thirty-nine women and five men (mean age±SD: 14.8±2.3 years) met the inclusion criteria, and unoperated AIS patients were used as control (twenty-two women, mean age±SD: 15.32±1.43 years). The prostrations ROM of the SF-AIS group differed significantly from the control group (p<0.05). The GPE of the prayer movement showed improvement in 36.4%, no change in 59.1%, and worsening in 4.5% of the SF-AIS patients. The worsened group had a significantly lower bowing ROM and higher prostrations ROM compared to all groups of prayer quality changes (p<0.05). SRS-30 scores showed good outcomes (function 4.0±0.2, pain 4.2±0.5), along with the overall bowing ROM and prostrations ROM (84.2±12.0° and 53.4±9.6°, respectively). Moreover, a significant moderate positive correlation between the bowing ROM and pain (r=0.417, p=0.007) was also found.

CONCLUSION

Spinal fusion positively affects AIS Islamic patients in maintaining their daily Salah movement, ROM and prayer quality. Prayer quality assessment should be given extra attention as an adjuvant of the SRS-30 questionnaire to evaluate Muslim patients.

Predicting Health-Related Quality of Life Outcomes Following Major Scoliosis Surgery in Adolescents: A Latent Class Growth Analysis

STUDY DESIGN

Prospective cohort study.

OBJECTIVES

To identify patient trajectories of recovery defined by change in health-related quality of life (HRQOL) following surgery for adolescent idiopathic scoliosis (AIS). To explore possible predictors of trajectory membership.

METHODS

Adolescent patients scheduled to undergo spinal fusion for AIS were enrolled in the Post-Operative Recovery following Spinal Correction: Home Experience (PORSCHE) study. Responses to the Pediatric Quality of Life Inventory-version 4 (PedsQL-4.0) were collected prior to surgery and 4 to 6 weeks, 3, 6, and 12 months post-operatively. Latent class growth analyses identified patient subgroups based on their unique trajectories of physical health (PH) and psychosocial health (PSH) outcomes using the PedsQL-4.0 subscale scores. Predictors included demographic, clinical, and psychosocial factors.

RESULTS

Data from up to 190 patients were included (87.4% female; mean±SD age = 14.6 ± 1.9 years). Three trajectory subgroups were identified for PH and 4 trajectories were found for PSH, with a majority of patients scoring within the established range of healthy adolescents 12 months post-surgery. Increased child and parent pain catastrophizing, child trait anxiety and previous hospitalizations were associated with poorer PH outcomes, whereas increased child and parent pain catastrophizing, child state and trait anxiety, and parent state and trait anxiety were associated with poorer PSH trajectories.

CONCLUSIONS

The PH and PSH trajectories identified in this study and the factors associated with their membership may inform surgical decision-making for AIS while facilitating patient and family counselling regarding peri-operative recovery and expectations.

The effect of implementation of pain neuroscience education and rehabilitation exercise on post-operative pain and recovery after laparoscopic colorectal surgery: a prospective randomized controlled trial

PURPOSES

To optimize the efficacy of analgesia and post-operative recovery for patients undergoing laparoscopic colorectal surgery by integrating a composite psycho-somatic analgesia algorithm involving peri-operative rehabilitation exercise and pain neuroscience education into multi-modal analgesia.

METHODS

A prospective randomized controlled trial was conducted to compare conventional peri-operative analgesia (group CA) and the addition of rehabilitation exercise and pain neuroscience education into it (group REPNE) for patients undergoing laparoscopic colorectal surgery. Acute and chronic post-operative pain, characteristics of pain (pain catastrophizing, sensitization, and trends of neuropathic transformation), and quality of post-operative recovery calibrated with EuroQol Five Dimensions Questionnaire (EQ-5D-5L) were investigated and compared between two groups.

RESULTS

A total of 175 patients consented to participate in this study. Compared with those receiving conventional analgesia (group CA, N = 89), patients in group REPNE (N = 86) reported reduced intensity of pain 24 h after surgery, less risk of pain catastrophizing and sensitization, and better quality of life during hospitalization recovery till 1 month after surgery (p < 0.05). No statistical difference was found for neuropathic transformation of post-operative pain or for the incidence of chronic post-operative pain (p > 0.05).

CONCLUSIONS

The addition of peri-operative rehabilitation exercise and pain neuroscience education into multi-modal analgesia provided better analgesic effect compared with routine practice for patients receiving laparoscopic colorectal surgery and also facilitated better post-operative recovery. This composite psycho-somatic algorithm for peri-operative analgesia merits further application in clinical practice.

Current Evidence for Biological Biomarkers and Mechanisms Underlying Acute to Chronic Pain Transition across the Pediatric Age Spectrum

Chronic pain is highly prevalent in the pediatric population. Many factors are involved in the transition from acute to chronic pain. Currently, there are conceptual models proposed, but they lack a mechanistically sound integrated theory considering the stages of child development. Objective biomarkers are critically needed for the diagnosis, risk stratification, and prognosis of the pathological stages of pain chronification. In this article, we summarize the current evidence on mechanisms and biomarkers of acute to chronic pain transitions in infants and children through the developmental lens. The goal is to identify gaps and outline future directions for basic and clinical research toward a developmentally informed theory of pain chronification in the pediatric population. At the outset, the importance of objective biomarkers for chronification of pain in children is outlined, followed by a summary of the current evidence on the mechanisms of acute to chronic pain transition in adults, in order to contrast with the developmental mechanisms of pain chronification in the pediatric population. Evidence is presented to show that chronic pain may have its origin from insults early in life, which prime the child for the development of chronic pain in later life. Furthermore, available genetic, epigenetic, psychophysical, electrophysiological, neuroimaging, neuroimmune, and sex mechanisms are described in infants and older children. In conclusion, future directions are discussed with a focus on research gaps, translational and clinical implications. Utilization of developmental mechanisms framework to inform clinical decision-making and strategies for prevention and management of acute to chronic pain transitions in children, is highlighted.

Pilot Investigation of Somatosensory Functioning and Pain Catastrophizing in Pediatric Spinal Fusion Surgery

PURPOSE

Chronic post-surgical pain (CPSP) is a significant concern and contributes to the opioid epidemic; however, little is known about CPSP in young people.

DESIGN

This prospective study aimed to identify sensory, psychological, and demographic factors that may increase the risk of CPSP after spinal fusion surgery for children and adolescents with idiopathic scoliosis.

METHODS

32 children and adolescents from two children's hospitals completed quantitative sensory testing (QST) and the Pain Catastrophizing Scale Child (PCS-C) pre-and 4-6 months post spinal fusion surgery. Between-group differences were assessed using an independent samples t-test. Pearson's correlations and stepwise linear regression were used to assess the relationship between variables at both time points.

RESULTS

56% of patients endorsed pain post-surgery. They were more sensitive tomechanical detection on both a control non-pain site (r = -2.87, p = .004) and the back (r = -1.83, p = .04), as well as pressure pain (r=-2.37, p = .01) on the back. This group also reported worse pain scores pre-surgery. Pre-surgery helplessness positively correlated with preoperative pain (r = .67 p < .001), and age was negatively correlated with the post-surgical catastrophizing total score (r =-.39, p = .05), suggesting that younger patients endorsed more pain-related worry after surgery.

CONCLUSIONS

Patients who present with pain during their preoperative appointment may need to be monitored with increased vigilance throughout the perioperative period, possibly with bedside QST and psychological questionnaires, which nurses could administer. Biobehavioral interventions targeting pain intensity and feelings of helplessness and anxiety during the preoperative period may alleviate the transition to CPSP.

Pain Catastrophizing Influences Preoperative and Postoperative Patient-Reported Outcomes in Adolescent Idiopathic Scoliosis

BACKGROUND

Patients with adolescent idiopathic scoliosis (AIS) often report chronic back pain; however, there is inadequate research on psychological factors associated with pain in this patient population. Pain catastrophizing, a psychological factor that describes a pattern of negative thoughts and feelings about pain, has been associated with poorer responses to medical treatment for pain. The purpose of this study was to report the prevalence of pain catastrophizing in the AIS population and assess its relationship with preoperative and postoperative self-reported outcomes.

METHODS

In this prospective cohort study of consecutive patients undergoing posterior spinal fusion (PSF) for AIS, patients experiencing clinically relevant pain catastrophizing, defined as a Pain Catastrophizing Scale for Children (PCS) score in the 75th percentile or higher, were compared with patients with normal PCS scores. Preoperative and 2-year postoperative Scoliosis Research Society Society Questionnaire-30 (SRS-30) scores were correlated with the preoperative PCS score.

RESULTS

One hundred and eighty-nine patients underwent PSF for AIS, and 20 (10.6%) were considered to be experiencing pain catastrophizing. Despite comparable demographic and radiographic variables, pain catastrophizing was associated with significantly lower preoperative scores than were found in the normal-PCS group in all SRS-30 domains, including pain (2.98 versus 3.95; p < 0.001), appearance (2.98 versus 3.48; p < 0.001), activity (3.51 versus 4.06; p < 0.001), mental health (3.12 versus 4.01; p < 0.001), and total score (3.18 versus 3.84; p < 0.001), except satisfaction (3.72 versus 3.69; p > 0.999). At 2 years, the pain catastrophizing group experienced significant improvement from their preoperative scores in most SRS-30 domains, including a large clinically relevant improvement in pain (from 2.98 preoperatively to 3.84 postoperatively; p < 0.001) and the total score (from 3.18 to 3.85; p < 0.001), but continued to have lower scores than the normal-PCS group for pain (3.84 versus 4.22; p = 0.028) and the total score (3.85 versus 4.15; p = 0.038). Receiver operating characteristic (ROC) curve analysis indicated that an SRS-30 pain score of <3.5 has good sensitivity for predicting pain catastrophizing (PCS ≥75th percentile).

CONCLUSIONS

In this cohort, patients with AIS who exhibited pain catastrophizing experienced significant improvement in self-reported health 2 years after PSF. However, they did not have the same levels of self-reported health as the normal-PCS group. Pain catastrophizing may be identifiable by lower preoperative SRS-30 pain scores.

LEVEL OF EVIDENCE

Prognostic Level II . See Instructions for Authors for a complete description of levels of evidence.

The Role of Walking in the Relationship between Catastrophizing and Fatigue in Women with Fibromyalgia

Walking is one of the most beneficial treatments for fibromyalgia patients. However, adherence to walking behavior is low due to the initially associated symptoms (including pain and fatigue). Although the association of catastrophism with greater symptoms is known, the results regarding fatigue have not always been consistent. Nevertheless, it is unknown whether the association between catastrophism and fatigue could, in turn, be conditioned by whether the patients walk or not. Therefore, our goal was to explore the moderating effect of walking on the association between catastrophizing and fatigue in patients with fibromyalgia. A cross-sectional study was carried out with 203 women with fibromyalgia. We used the Multidimensional Fatigue Inventory to assess fatigue and the Pain Catastrophizing Scale to assess pain catastrophizing (differentiating between its three dimensions). An ad hoc item was used to evaluate walking (moderator). Lower scores for fatigue and pain catastrophizing were found among patients who walked versus those who did not. Walking moderated the relationship between rumination and fatigue (Beta = 0.16, t = 1.96, p = 0.049) and between magnification and fatigue (Beta = 0.22, t = 21.83, p = 0.047). Helplessness showed no direct or interaction effect for fatigue. Nevertheless, higher rumination and magnification were associated with higher fatigue only in patients who walked. Therefore, to promote adherence to walking and reduce the effects of catastrophizing on fatigue, it seems necessary to manage rumination and magnification among patients who walk.

Preventing Pediatric Chronic Postsurgical Pain: Time for Increased Rigor

Chronic postsurgical pain (CPSP) results from a cascade of events in the peripheral and central nervous systems following surgery. Several clinical predictors, including the prior pain state, premorbid psychological state (e.g., anxiety, catastrophizing), intraoperative surgical load (establishment of peripheral and central sensitization), and acute postoperative pain management, may contribute to the patient’s risk of developing CPSP. However, research on the neurobiological and biobehavioral mechanisms contributing to pediatric CPSP and effective preemptive/treatment strategies are still lacking. Here we evaluate the perisurgical process by identifying key problems and propose potential solutions for the pre-, intra-, and postoperative pain states to both prevent and manage the transition of acute to chronic pain. We propose an eight-step process involving preemptive and preventative analgesia, behavioral interventions, and the use of biomarkers (brain-based, inflammatory, or genetic) to facilitate timely evaluation and treatment of premorbid psychological factors, ongoing surgical pain, and postoperative pain to provide an overall improved outcome. By achieving this, we can begin to establish personalized precision medicine for children and adolescents presenting to surgery and subsequent treatment selection.

Developmental Mechanisms of CPSP: Clinical Observations and Translational Laboratory Evaluations

Understanding mechanisms that underly the transition from acute to chronic pain and identifying potential targets for preventing or minimizing this progression have specific relevance for chronic postsurgical pain (CPSP). Though it is clear that multiple psychosocial, family, and environmental factors may influence CPSP, this review will focus on parallels between clinical observations and translational laboratory studies investigating the acute and long-term effects of surgical injury on nociceptive pathways. This includes data related to alterations in sensitivity at different points along nociceptive pathways from the periphery to the brain; age- and sex-dependent mechanisms underlying the transition from acute to persistent pain; potential targets for preventive interventions; and the impact of prior surgical injury. Ongoing preclinical studies evaluating age- and sex-dependent mechanisms will also inform comparative efficacy and preclinical safety assessments of potential preventive pharmacological interventions aimed at reducing the risk of CPSP. In future clinical studies, more detailed and longitudinal peri-operative phenotyping with patient- and parent-reported chronic pain core outcomes, alongside more specialized evaluations of somatosensory function, modulation, and circuitry, may enhance understanding of individual variability in postsurgical pain trajectories and improve recognition and management of CPSP.

Activity Patterns and Functioning. A Contextual-Functional Approach to Pain Catastrophizing in Women with Fibromyalgia

Background: The psychological flexibility model states that activity patterns are not deemed to be intrinsically functional or dysfunctional; it is considered that underlying factors, such as personal goals and contextual factors, are what will determine their effects on disability. Pain catastrophizing has frequently been associated with several important pain-related outcomes. Despite its recent conceptualization within affective–motivational approaches, its moderating role between activity patterns and dysfunction has not been analyzed. Methods: This study analyzes the moderating role of pain catastrophizing and its dimensions (Pain Catastrophizing Scale) between activity patterns (Activity Patterns Scale) and disease impact (Fibromyalgia Impact Questionnaire—Revised) in 491 women with fibromyalgia. Results: Activity avoidance (p < 0.001), excessive persistence (p < 0.001) and pacing (p < 0.01) patterns were positively associated with fibromyalgia impact. Helplessness shows a moderating role between pain avoidance (B = 0.100, t =2.30, p = 0.021, [0.01, 0.18]), excessive persistence (B = −0.09, t = −2.24, p = 0.02, [−0.18, −0.01]), pain persistence (B = −0.10, t = −2.04, p = 0.04, [−0.19, −0.004]) and functioning. Conclusion: Helplessness (within pain catastrophizing) is a relevant variable within psychological flexibility models applied to activity patterns. Specifically, pain avoidance is especially dysfunctional in patients with high helplessness. To improve excessive persistence and pain persistence, it is necessary to reduce helplessness before regulating activity patterns.