1
|
Tham SW, Li R, Edwards RR, Palermo TM. Pain Catastrophizing Moderates the Relationship Between Pain Sensitivity and Clinical Pain in Adolescents With Functional Abdominal Pain. THE JOURNAL OF PAIN 2024; 25:104549. [PMID: 38657783 DOI: 10.1016/j.jpain.2024.104549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 03/21/2024] [Accepted: 04/16/2024] [Indexed: 04/26/2024]
Abstract
Pain catastrophizing has been linked to amplified pain sensitivity assessed using quantitative sensory testing (QST) in adults; pediatric data are limited, particularly in youth with functional abdominal pain (FAP). With increasing use of QST to evaluate somatosensory function and predict pain outcomes, we examined the associations between QST and clinical pain in adolescents with FAP and tested the moderating effects of pain catastrophizing. Seventy-seven adolescents (mean age 16.6 years, 85.7% female, 72.7% White, 90.8% non-Hispanic) who fulfilled diagnostic criteria for FAP completed QST assessment (pressure pain threshold and tolerance, heat pain threshold, conditioned pain modulation) and measures of abdominal pain intensity, pain interference, and pain catastrophizing. Adjusting for age and sex, only higher heat pain threshold was associated with higher abdominal pain intensity (Beta per 1-standard deviation = .54, P = .026). Contrary to hypothesis, for youth with higher pain catastrophizing, higher pressure pain tolerance was associated with greater abdominal pain intensity, but associations were not significant for youth with lower catastrophizing (P = .049). Similarly, for those with higher pain catastrophizing (in contrast to lower pain catastrophizing), higher pressure pain thresholds and tolerance were associated with higher pain interference (P = .039, .004, respectively). Results highlight the need to investigate the influence of pain catastrophizing on QST. PERSPECTIVE: This study demonstrated unexpected findings of pain catastrophizing moderating the relationships between pressure pain threshold and tolerance, and clinical pain in adolescents with FAP. This raised questions regarding our understanding of psychological contributions to QST findings in pediatric populations with chronic pain.
Collapse
Affiliation(s)
- See Wan Tham
- Department of Anesthesiology and Pain Medicine, University of Washington School of Medicine, Seattle, Washington; Center for Child Health, Behavior and Development, Seattle Children's Research Institute, Seattle, Washington
| | - Rui Li
- Department of Anesthesiology and Pain Medicine, University of Washington School of Medicine, Seattle, Washington; Center for Child Health, Behavior and Development, Seattle Children's Research Institute, Seattle, Washington
| | - Robert R Edwards
- Department of Anesthesiology, Perioperative and Pain Medicine, Harvard Medical School, Brigham and Women's Hospital, Massachusetts
| | - Tonya M Palermo
- Department of Anesthesiology and Pain Medicine, University of Washington School of Medicine, Seattle, Washington; Center for Child Health, Behavior and Development, Seattle Children's Research Institute, Seattle, Washington
| |
Collapse
|
2
|
Ocay DD, Lobo K, Kim A, Halpin M, Berde CB. Development and validation of a home quantitative sensory testing tool-kit to assess changes in sensory and pain processing: a study in healthy young adults. Pain 2024:00006396-990000000-00647. [PMID: 38981069 DOI: 10.1097/j.pain.0000000000003320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Accepted: 05/23/2024] [Indexed: 07/11/2024]
Abstract
ABSTRACT Quantitative sensory testing (QST) is a set of methods for quantifying somatosensory functioning. Limitations of laboratory-based QST (LQST) include high cost, complexity in training, lack of portability, and time requirements for testing. Translating QST to a home setting could facilitate future research and clinical care. The objective of this study was to develop a home QST (HQST) tool-kit that is cost-effective, easy to use, and detects changes in sensory and pain processing. Thirty-two young healthy adults underwent sensory testing on their nondominant forearm using standard in-person LQST, followed by "simulated HQST" using video guidance in a separate room from the investigator before and after application of either a lidocaine or capsaicin cream. We observed good agreement between HQST and LQST scores, with significant correlations observed between the pinprick, pressure, cold and heat measures (|ρ| range = 0.36-0.54). The participants rated the HQST protocol as highly acceptable and safe but can be improved in future implementations. Home QST was able to detect hypoesthesia to vibration after lidocaine cream application (P = 0.024, d = 0.502) and could detect hypoalgesia and hyperalgesia to pressure and heat pain sensitivity tests after application of lidocaine and capsaicin creams, respectively (P-value range = <0.001-0.036, d-value range = 0.563-0.901). Despite limitations, HQST tool-kits may become a cost-effective, convenient, and scalable approach for improving sensory profiling in clinical care and clinical research.
Collapse
Affiliation(s)
- Don Daniel Ocay
- Department of Anesthesiology, Critical Care, and Pain Medicine, Boston Children's Hospital, Boston, MA, United States
- Department of Anaesthesia, Harvard Medical School, Boston, MA, United States
| | - Kimberly Lobo
- Department of Anesthesiology, Critical Care, and Pain Medicine, Boston Children's Hospital, Boston, MA, United States
| | - Angela Kim
- Department of Anesthesiology, Critical Care, and Pain Medicine, Boston Children's Hospital, Boston, MA, United States
| | - Meghan Halpin
- Department of Anesthesiology, Critical Care, and Pain Medicine, Boston Children's Hospital, Boston, MA, United States
| | - Charles B Berde
- Department of Anesthesiology, Critical Care, and Pain Medicine, Boston Children's Hospital, Boston, MA, United States
- Department of Anaesthesia, Harvard Medical School, Boston, MA, United States
| |
Collapse
|
3
|
Jørgensen JV, Werner MU, Michelsen JS, Tierp-Wong CNE. Assessment of somatosensory profiles by quantitative sensory testing in children and adolescents with and without cerebral palsy and chronic pain. Eur J Paediatr Neurol 2024; 51:32-40. [PMID: 38795436 DOI: 10.1016/j.ejpn.2024.05.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 10/03/2023] [Accepted: 05/17/2024] [Indexed: 05/28/2024]
Abstract
OBJECTIVE We investigated differences in somatosensory profiles (SSPs) assessed by quantitative sensory testing in children and adolescents with cerebral palsy (CCP) with and without chronic pain and compared these differences to those in a group of typically developed children and adolescents (TDC) with and without chronic pain. METHOD All included subjects were consecutively recruited from and tested at the same outpatient orthopedic clinic by the same investigator. The subjects had their reaction times tested. The SSP consisted of the following tests: warmth (WDT), cool (CDT), mechanical (MDT), and vibration (VDT) detection thresholds; heat (HPT), pressure (PPT), and mechanical (MPT) pain thresholds; wind-up ratio (WUR); dynamic mechanical allodynia (DMA) and cold pressor test (CPT) using a conditioned pain modulation (CPM) paradigm. RESULTS We included 25 CCP and 26 TDC. TDC without chronic pain served as controls. In TDC with chronic pain, WDT, HPT, HPT intensity, and PPT were higher than in controls. No differences in SSPs between CCP with and without chronic pain were observed. In CCP, the MDT, WDT, CDT, and HPT intensity were higher than in controls. CCP had longer reaction times than TDC. There were no differences regarding the remaining variables. DISCUSSION In CCP, the SSPs were independent of pain status and findings on MR images. In all CCP the SSPs resembled TDC with chronic pain, compared to TDC without chronic pain. This suggests that CCP do not have the normal neuroplastic adaptive processes that activate and elicit functional changes in the central and peripheral nervous systems.
Collapse
Affiliation(s)
| | - Mads Utke Werner
- Multidisciplinary Pain Center, Department of Anesthesia, Pain and Respiratory Support, Neuroscience Center, Rigshospitalet University Hospitals, Copenhagen, Denmark; Department of Clinical Sciences, Lund University, Lund, Sweden
| | | | - Christian Nai En Tierp-Wong
- Department of Orthopedic Surgery, Hvidovre University Hospital, Copenhagen, Denmark; Department of Orthopedic Surgery 6011, Rigshospitalet University Hospital, Copenhagen, Denmark
| |
Collapse
|
4
|
Levy Gigi E, Rachmani M, Defrin R. The relationship between traumatic exposure and pain perception in children: the moderating role of posttraumatic symptoms. Pain 2024:00006396-990000000-00599. [PMID: 38728536 DOI: 10.1097/j.pain.0000000000003266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Accepted: 03/07/2024] [Indexed: 05/12/2024]
Abstract
ABSTRACT Adverse childhood experiences (ACEs) affect approximately half of all children worldwide. These experiences have been linked to increased pain sensitivity in adulthood and a higher likelihood of developing severe chronic pain. However, most studies have assessed the effects of ACEs retrospectively, long after they occurred, leaving room for other factors to influence the observed outcomes. We investigated, for the first time, the association between ACEs and concurrent pain perception among young children who live in a conflict zone and are consistently exposed to potentially traumatic experiences. Participants were 60 elementary school children (ages 8-11 years) living in conflict regions (n = 39) or nonconflict regions (n = 21). Posttraumatic stress symptom (PTSS) severity, traumatic exposure, pressure pain threshold (PPT), and mechanical detection threshold (MDT) were measured. Trauma-exposed children had significantly lower PPT than did controls, but MDT was similar across groups. Pressure pain threshold correlated positively with proximity to the conflict zone and inversely with traumatic exposure magnitude and PTSS severity. In addition, PTSSs moderated the relationship between repeated traumatic exposure and PPT. Children with higher PTSS severity displayed pain hypersensitivity regardless of their traumatic exposure level, whereas in children with lower PTSS severity, greater traumatic exposure correlated with pain hypersensitivity. The results suggest that ACEs among children lead to concurrent pain hypersensitivity and distress and may put them at elevated risk of chronic pain early in life. In addition, our findings emphasize the need for identifying children with various PTSS levels to provide tailored interventions and mitigate the long-term negative effects of ACEs.
Collapse
Affiliation(s)
- Einat Levy Gigi
- Faculty of Education, Bar-Ilan University, Ramat Gan, Israel
- The Gonda Multidisciplinary Brain Research Center, Bar-Ilan University, Ramat Gan, Israel
| | - Moriya Rachmani
- Faculty of Education, Bar-Ilan University, Ramat Gan, Israel
| | - Ruth Defrin
- Department of Physical Therapy, Faculty of Medicine & Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel
| |
Collapse
|
5
|
Salbego RS, Conti PCR, Soares FFC, Ferreira DMAO, Herreira-Ferreira M, de Lima-Netto BA, Svensson P, Costa YM, Bonjardim LR. Influence of psychometric and sleep quality features on painful mechanical sensitivity and pain modulation in patients with temporomandibular disorders. Clin Oral Investig 2024; 28:302. [PMID: 38714576 DOI: 10.1007/s00784-024-05699-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Accepted: 04/28/2024] [Indexed: 05/10/2024]
Abstract
Investigating the collective impact of psychometric properties and sleep quality on pain sensitivity in temporomandibular disorder (TMD) patients could improve clinical management strategies. OBJECTIVE Assessing whether combined psychometric properties and sleep quality impact painful mechanical sensitivity and pain modulation in TMD patients. MATERIALS AND METHODS A cross-sectional study using secondary data analysis of 77 TMD patients and 101 controls. All participants completed questionnaires characterizing their psychometric profile (anxiety, depression, stress and catastrophizing) and sleep quality, alongside psychophysical tests for painful mechanical sensory (mechanical pain threshold (MPT), pressure pain threshold (PPT), and wind-up ratio (WUR)) and conditioned pain modulation (CPM). Participants were grouped into "High distress" or "Low distress" categories based on psychometric properties and sleep quality using hierarchical cluster and k-means analyses. Multiple linear regression evaluated the influence of TMD, age, and the distress cluster on MPT, WUR, PPT, and CPM in masseter and thenar muscles. Differences were statistically significant when p < 0.05. RESULTS The presence of TMD was the strongest predictor of mechanical painful sensitivity in the trigeminal region (MPT[F(3,174) = 51.902;p < .001;R2 = .463]; TMD presence (β = -.682) / PPT[F(3,174) = 15.573;p < .001;R2 = .198] TMD presence (β = -.452), and extra-trigeminal (MPT[F(3,174) = 35.897;p < .001;R2 = .382] TMD (β = -.647) / CPM [F(3,174) = 4.106;p < .05;R2 = .050] TMD presence (β = .197). Furthermore, neither the high distress group nor the low distress group were able to significantly influence the variation of the values of any of the psychophysical variables evaluated (p > .05). CONCLUSIONS There is not a significant influence of impairment clusters based on psychological variables and sleep quality on painful mechanical sensitivity and pain modulation, regardless of the presence of TMD. CLINICAL RELEVANCE This outcome suggests that psychosocial factors and sleep quality may not play a decisive role in the sensory-discriminative aspect of pain, particularly concerning painful TMD.
Collapse
Affiliation(s)
- Rafaela Stocker Salbego
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil.
| | - Paulo César Rodrigues Conti
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | | | | | - Matheus Herreira-Ferreira
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | | | | | - Yuri Martins Costa
- Department of Biosciences, Piracicaba School of Dentistry, University of Campinas, Piracicaba, Brazil
| | | |
Collapse
|
6
|
Walker SM, Peters J, Verriotis M, Farag F, Jay MA, Howard RF. Sensitivity and Specificity of a Neuropathic Screening Tool (Self-Report Leeds Assessment of Neuropathic Symptoms and Signs, S-LANSS) in Adolescents With Moderate-Severe Chronic Pain. THE JOURNAL OF PAIN 2024; 25:451-465. [PMID: 37741521 DOI: 10.1016/j.jpain.2023.09.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 08/27/2023] [Accepted: 09/07/2023] [Indexed: 09/25/2023]
Abstract
Neuropathic screening tools improve recognition of neuropathic pain in adults. Although utilized in pediatric populations, the sensitivity, specificity and methodology of screening tool delivery have not been compared in children. We evaluated the Self-Report Leeds Assessment of Neuropathic Symptoms and Signs (S-LANSS) in adolescents (10-18 years) referred to a tertiary pediatric pain clinic. History and examination by specialist clinicians and multidisciplinary assessment informed classification of the primary pain type. In a prospective cohort, scores were obtained at interview (S-LANSS interview; n = 161, 70% female), and following substitution of self-reported signs with examination findings in the primary pain region (Leeds Assessment of Neuropathic Symptoms and Signs, LANSS examination). Secondly, we retrospectively retrieved questionnaires self-completed by adolescents at their initial clinic appointment (S-LANSS self-completed; n = 456, 73% female). Thirdly, we explored relationships between patient-reported outcomes and S-LANSS scores. S-LANSS interview scores varied with pain classification, and S-LANSS self-completed scores were similarly highest with neuropathic pain (median [interquartile range]: 18 [11, 21]) and complex regional pain syndrome (21 [14, 24]), variable with musculoskeletal pain (13 [7, 19]) and lowest with visceral pain (6.5 [2, 11.5]) and headache (8.5 [4, 14]). As in adults, the cutpoint score of 12/24 was optimal. Sensitivity was highest with inclusion of examination findings and lowest with self-completion (LANSS examination vs S-LANSS interview vs S-LANSS self-completed: 86.3% vs 80.8% vs 74.7%), but specificity was relatively low (37.8% vs 36.7% vs 48%). High S-LANSS scores in non-neuropathic groups were associated with female sex and high pain catastrophizing. The S-LANSS is a sensitive screening tool for pain with neuropathic features in adolescents, but needs to be interpreted in the context of clinical evaluation (clinicaltrials.gov NCT03312881). PERSPECTIVE: This article reports high sensitivity of the S-LANSS screening tool for identifying pain with neuropathic features in adolescents with moderate-severe chronic pain. However, as sensitivity is lower than in adult populations, further interdisciplinary evaluation is necessary to inform diagnosis and management.
Collapse
Affiliation(s)
- Suellen M Walker
- Paediatric Pain Research Group, Developmental Neurosciences Program, UCL Great Ormond Street Institute of Child Health, London, United Kingdom; Department of Anaesthesia and Pain Medicine, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Judy Peters
- Paediatric Pain Research Group, Developmental Neurosciences Program, UCL Great Ormond Street Institute of Child Health, London, United Kingdom; Department of Anaesthesia and Pain Medicine, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Madeleine Verriotis
- Paediatric Pain Research Group, Developmental Neurosciences Program, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Fadila Farag
- Paediatric Pain Research Group, Developmental Neurosciences Program, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Matthew A Jay
- Department of Anaesthesia and Pain Medicine, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Richard F Howard
- Paediatric Pain Research Group, Developmental Neurosciences Program, UCL Great Ormond Street Institute of Child Health, London, United Kingdom; Department of Anaesthesia and Pain Medicine, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| |
Collapse
|
7
|
Sauer AK, Vigouroux M, Dougherty PM, Cata JP, Ingelmo PM. Pain Experience and Sensory Changes in Astronauts During and After Short-Lasting Commercial Spaceflight: A Proof-of-Concept Study. J Pain Res 2023; 16:4253-4266. [PMID: 38107368 PMCID: PMC10723599 DOI: 10.2147/jpr.s440630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 12/02/2023] [Indexed: 12/19/2023] Open
Abstract
Space travel has been associated with musculoskeletal pain, yet little is known about the nociceptive changes and pain experience during spaceflight. This preliminary study aims to investigate the pain experience and sensory alterations in astronauts following a 17-day mission to the International Space Station (ISS) on Axiom Space's AX-1 commercial space flight. Two participants were enrolled, and data were collected pre-flight, in-flight, post-flight, and three-month post-flight. Validated pain questionnaires assessed anxiety, catastrophizing, impact on physical and mental health, disability, and overall pain experience. Qualitative interviews were conducted post-landing and conditioned pain modulation (CPM) and quantitative sensory testing (QST) were performed. Both astronauts reported musculoskeletal pain during and after the flight, which was managed with anti-inflammatories and stretching techniques. Pain levels returned to baseline after three months. Pain questionnaires revealed heightened pain experiences in-flight and immediately post-flight, although their adequacy in assessing pain in space is uncertain. Qualitative interviews allowed astronauts to describe their pain experiences during the flight. Sensory changes included increased mechanical touch detection thresholds, temporal pain summation, heat pain thresholds, and differences in conditioned pain modulation post-flight. This preliminary study suggested that spaceflight may affect various aspects of sensory perception and regulation in astronauts, albeit in a variable manner. More data are needed to gain insight of on gain and loss of sensory functions during space missions. Further investigation into the multifactorial stressors affecting the somatosensory system during space travel could contribute to advancements in space and pain medicine.
Collapse
Affiliation(s)
- Andrea K Sauer
- Department of Anesthesia, University of Bonn, Bonn, Germany
| | - Marie Vigouroux
- Department of Anesthesia, McGill University, Montreal, QC, Canada
- Edwards Family Interdisciplinary Center for Complex Pain, Montreal Children’s Hospital, Montreal, QC, Canada
| | - Patrick M Dougherty
- Department of Pain Medicine, The University of Texas – MD Anderson Cancer Center, Houston, TX, USA
| | - Juan Pablo Cata
- Department of Anesthesia and Perioperative Medicine, The University of Texas – MD Anderson Cancer Center, Houston, TX, USA
- Anesthesiology and Surgical Oncology Research Group, Houston, TX, USA
| | - Pablo M Ingelmo
- Department of Anesthesia, McGill University, Montreal, QC, Canada
- Edwards Family Interdisciplinary Center for Complex Pain, Montreal Children’s Hospital, Montreal, QC, Canada
- Alan Edwards Centre for Research on Pain, McGill University, Montreal, QC, Canada
- Research Institute, McGill University Health Center, Montreal, QC, Canada
| |
Collapse
|
8
|
Ocay DD, Ross BD, Moscaritolo L, Ahmed N, Ouellet JA, Ferland CE, Ingelmo PM. The Psychosocial Characteristics and Somatosensory Function of Children and Adolescents Who Meet the Criteria for Chronic Nociplastic Pain. J Pain Res 2023; 16:487-500. [PMID: 36815125 PMCID: PMC9939946 DOI: 10.2147/jpr.s397829] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Accepted: 02/10/2023] [Indexed: 02/17/2023] Open
Abstract
Purpose Nociplastic pain distinguishes individuals with pain and hypersensitivity in body regions with apparently normal tissues, without any signs of neuropathy, but with contribution of central and/or peripheral sensitization. There is a lack of literature describing nociplastic pain in the pediatric population. The objective of this study was to investigate the differences between pediatric patients with nociplastic pain compared with patients with non-nociplastic pain. Patients and Methods This study included 414 pediatric patients followed at an interdisciplinary centre for complex pain. All patients underwent an exhaustive pain assessment consisting of face-to-face interviews, validated self-report questionnaires and quantitative sensory testing. Recently established criteria for chronic nociplastic pain, and quantitative sensory testing was used to describe and stratify our cohort. Results One hundred and sixty-five patients (40%) were stratified as having possible nociplastic pain and two hundred and forty-nine (60%) patients, as non-nociplastic pain. Patients with nociplastic pain displayed pain hypersensitivity in the region of pain, more symptoms of panic and social phobia, and worse sleep quality than patients with non-nociplastic pain. The proportion of patients achieving a meaningful clinical outcome after completion of their treatment (medications, physiotherapy, psychology, nursing, social worker, and/or interventional procedures) was lower in patients with nociplastic pain (62%) than those without nociplastic pain (86%). Conclusion Our results suggest that patients who meet the criteria for nociplastic pain can be identified in a population of children and adolescents being treated in a center for complex pain. Combining screening with validated questionnaires and quantitative sensory testing facilitates the phenotyping and graded severity of patients with nociplastic pain in daily clinical practice.
Collapse
Affiliation(s)
- Don Daniel Ocay
- Department of Experimental Surgery, McGill University, Montreal, QC, Canada,Department of Clinical Research, Shriners Hospitals for Children Canada, Montreal, QC, Canada,Edwards Family Interdisciplinary Centre for Complex Pain, Montreal Children’s Hospital, Montreal, QC, Canada
| | - Brendan D Ross
- Faculty of Medicine, McGill University, Montreal, QC, Canada
| | - Lorenzo Moscaritolo
- Edwards Family Interdisciplinary Centre for Complex Pain, Montreal Children’s Hospital, Montreal, QC, Canada
| | - Nabeel Ahmed
- Faculty of Medicine, McGill University, Montreal, QC, Canada
| | - Jean A Ouellet
- Department of Clinical Research, Shriners Hospitals for Children Canada, Montreal, QC, Canada,Department of Pediatric Surgery, McGill University, Montreal, QC, Canada,Department of Anesthesia, McGill University, Montreal, QC, Canada,Research Institute-McGill University Health Centre, Montreal, QC, Canada
| | - Catherine E Ferland
- Department of Experimental Surgery, McGill University, Montreal, QC, Canada,Department of Clinical Research, Shriners Hospitals for Children Canada, Montreal, QC, Canada,Edwards Family Interdisciplinary Centre for Complex Pain, Montreal Children’s Hospital, Montreal, QC, Canada,Department of Anesthesia, McGill University, Montreal, QC, Canada,Research Institute-McGill University Health Centre, Montreal, QC, Canada,Alan Edwards Research Center for Pain, McGill University, Montreal, QC, Canada
| | - Pablo M Ingelmo
- Edwards Family Interdisciplinary Centre for Complex Pain, Montreal Children’s Hospital, Montreal, QC, Canada,Department of Anesthesia, McGill University, Montreal, QC, Canada,Research Institute-McGill University Health Centre, Montreal, QC, Canada,Alan Edwards Research Center for Pain, McGill University, Montreal, QC, Canada,Correspondence: Pablo M Ingelmo, Edwards Family Interdisciplinary Centre for Complex Pain, Montreal Children’s Hospital, B02-3525-1001 Boulevard Décarie, Montreal, H4A 13J, Canada, Tel +1 514 412-4448, Fax +1 514 412-4341, Email
| |
Collapse
|
9
|
Clusters of facilitatory and inhibitory conditioned pain modulation responses in a large sample of children, adolescents, and young adults with chronic pain. Pain Rep 2022; 7:e1032. [PMID: 36213595 PMCID: PMC9534368 DOI: 10.1097/pr9.0000000000001032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 06/01/2022] [Accepted: 07/17/2022] [Indexed: 11/26/2022] Open
Abstract
Supplemental Digital Content is Available in the Text. Findings from the current study add to the literature by describing different clinical phenotypes of central pain mechanisms of youth with chronic pain. Introduction: When investigating the role of facilitatory and inhibitory pain mechanisms such as conditioned pain modulation (CPM) and temporal summation of pain (TSP), it is important to take both into consideration in a single experimental model to provide the most information on subgroups of patients. Therefore, the objective of this study was to identify subgroups in a large population of pediatric patients with chronic pain based on their facilitatory and inhibitory pain mechanisms and compare them with control subjects. Methods: Five hundred twenty-one female subjects and 147 male subjects between 8 and 21 years old underwent a CPM assessment using a 2-minute tonic noxious heat stimulation as the test stimulus and a 2-minute cold-pressor task (CPT) (12°C) as the conditioning stimulus. Results: The best partition of clusters of patients was 3 clusters accounting for 27.15% of the total variation in the data. Cluster 1 (n = 271) was best characterized by high pain intensity during the CPT, lack of TSP during the test stimuli, and efficient inhibitory CPM. Cluster 2 (n = 186) was best characterized by low pain intensity during the CPT, lack of TSP during the test stimuli, and efficient inhibitory CPM. Cluster 3 (n = 151) was best characterized by high pain intensity during the CPT, presence of TSP during the test stimuli, and inefficient inhibitory CPM. Discussion: A single thermal CPM experimental design can identify combinations of facilitatory and inhibitory pain modulation responses. Findings from the current study add to the literature by describing different clinical phenotypes of central pain mechanisms of youth with chronic pain.
Collapse
|