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Olsen U, Sellevold VB, Gay CL, Aamodt A, Lerdal A, Hagen M, Dihle A, Lindberg MF. Factors associated with pain and functional impairment five years after total knee arthroplasty: a prospective observational study. BMC Musculoskelet Disord 2024; 25:22. [PMID: 38167008 PMCID: PMC10759478 DOI: 10.1186/s12891-023-07125-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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 12/15/2023] [Indexed: 01/05/2024] Open
Abstract
BACKGROUND Few studies have evaluated the associations between preoperative factors and pain and physical function outcomes after total knee arthroplasty (TKA) from a mid-term perspective. Identification of such factors is important for optimizing outcomes following surgery. Thus, we examined the associations between selected preoperative factors and moderate to severe pain and pain-related functional impairment as measured using the Brief Pain Inventory (BPI), five years after TKA in patients with knee osteoarthritis. METHODS In this prospective observational study, all patients scheduled for primary unilateral TKA for osteoarthritis were consecutively recruited. Preoperative factors identified from previous meta-analyses were included to assess their associations with pain severity and pain-related functional impairment five years after TKA. Pain severity was the primary outcome, while pain-related functional impairment was the secondary outcome. The BPI was used to evaluate outcomes five years post-TKA. Statistically significant factors from univariate regressions were entered into a multiple logistic regression model to identify those with the strongest associations with pain severity or pain-related functional impairment five years after TKA. RESULTS A total of 136 patients were included, with a mean age of 67.7 years (SD 9.2) and a majority being female (68%). More severe preoperative pain (OR = 1.34, 95% CI [1.03 to 1.74]), more painful sites (OR = 1.28., 95% CI [1.01 to 1.63]), and more severe anxiety symptoms (OR = 1.14., 95% CI [1.01 to 1.28]) were associated with increased likelihood of moderate to severe pain five years after TKA surgery, while more severe osteoarthritis (OR = 0.13, 95% CI [0.03 to 0.61]) was associated with reduced likelihood of moderate to severe pain five years after TKA. More severe anxiety symptoms (OR = 1.25, 95% CI [1.08 to 1.46]) were also associated with increased likelihood of moderate to severe pain-related functional impairment five years after surgery, while male sex (OR = 0.23, 95% CI [0.05 to 0.98]) was associated with reduced likelihood of pain-related functional impairment five years after surgery. CONCLUSION The identified preoperative factors should be included in larger prognostic studies evaluating the associations between preoperative factors and mid-term pain severity and physical function outcomes after TKA surgery.
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Affiliation(s)
- Unni Olsen
- Department of Public Health Science, Institute of Health and Society, Faculty of Medicine, University of Oslo, Oslo, Norway.
- Department of Orthopaedic Surgery, Lovisenberg Diaconal Hospital, PB 4970 Nydalen, Oslo, 0440, Norway.
| | - Vibeke Bull Sellevold
- Lovisenberg Diaconal University College, Oslo, Norway
- Faculty of Health Sciences, Department of Nursing and Health Promotion, Oslo Metropolitan University, Oslo, Norway
| | - Caryl L Gay
- Department of Family Health Care Nursing, University of California, San Francisco, USA
- Research Department, Lovisenberg Diaconal Hospital, Oslo, Norway
| | - Arild Aamodt
- Department of Orthopaedic Surgery, Lovisenberg Diaconal Hospital, PB 4970 Nydalen, Oslo, 0440, Norway
| | - Anners Lerdal
- Research Department, Lovisenberg Diaconal Hospital, Oslo, Norway
- Department of Interdisciplinary Health Sciences, Institute of Health and Society, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Milada Hagen
- Faculty of Health Sciences, Department of Nursing and Health Promotion, Oslo Metropolitan University, Oslo, Norway
| | - Alfhild Dihle
- Faculty of Health Sciences, Department of Nursing and Health Promotion, Oslo Metropolitan University, Oslo, Norway
| | - Maren Falch Lindberg
- Department of Public Health Science, Institute of Health and Society, Faculty of Medicine, University of Oslo, Oslo, Norway
- Department of Orthopaedic Surgery, Lovisenberg Diaconal Hospital, PB 4970 Nydalen, Oslo, 0440, Norway
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2
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Ginnerup-Nielsen E, Bandak E, Bartholdy C, Henriksen M, Wæhrens EE. Validity of the Brief Illness Perception Questionnaire in people with knee pain: a Rasch analysis. Scand J Rheumatol 2024; 53:63-71. [PMID: 37751331 DOI: 10.1080/03009742.2023.2256089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 09/04/2023] [Indexed: 09/28/2023]
Abstract
OBJECTIVE The Brief Illness Perception Questionnaire (B-IPQ) is a frequently used measure of illness perception (IP). The aim of this study was to explore the psychometric properties of the questionnaire when used in elderly people with knee pain. METHOD Based on data from the Frederiksberg Cohort on elderly people reporting knee pain (N = 836), the psychometric properties of the eight B-IPQ items (1 'Consequences', 2 'Timeline', 3 'Personal control', 4 'Treatment control', 5 'Identity', 6 'Concern', 7 'Coherence', and 8 'Emotions') were analysed using Rasch analysis to establish whether the questionnaire provides reliable and valid measures of IP. RESULTS Threshold disordering was found on the 1-10 rating scale in all items. When rescaling to a 0-2 rating scale, disordering was resolved in six items. Item goodness-of-fit analyses revealed that two items displayed underfit misfit and four items overfit misfit; hence, the B-IPQ does not present unidimensionality. The person separation index indicated that items separate respondents into only two IP levels. Finally, floor and ceiling effects were found, indicating that the B-IPQ may not fully describe the extent of IP in this population. CONCLUSION The 1-10 rating scale used in the Danish B-IPQ targeting knee pain is suboptimal, while a 0-2 scale improves the psychometric properties of the scale. The B-IPQ does not present unidimensionality and the use of a sum score is therefore not recommended when assessing IP. The B-IPQ may not cover the extent of IP in elderly people with knee pain.
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Affiliation(s)
- E Ginnerup-Nielsen
- The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark
| | - E Bandak
- The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark
- Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - C Bartholdy
- The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark
| | - M Henriksen
- The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark
| | - E E Wæhrens
- The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark
- Department of Public Health, University of Southern Denmark, Odense, Denmark
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Springborg AH, Visby L, Kehlet H, Foss NB. Psychological predictors of acute postoperative pain after total knee and hip arthroplasty: A systematic review. Acta Anaesthesiol Scand 2023; 67:1322-1337. [PMID: 37400963 DOI: 10.1111/aas.14301] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 06/08/2023] [Accepted: 06/14/2023] [Indexed: 07/05/2023]
Abstract
BACKGROUND Identifying patients at high risk of acute postoperative pain after total knee or hip arthroplasty (TKA/THA) will facilitate individualized pain management and research on the efficacy of treatment options. Numerous studies have reported that psychological patient factors may influence acute postoperative pain, but most reviews have focused on chronic pain and functional outcomes. This systematic review aims to evaluate which psychological metrics are associated with acute postoperative pain after TKA and THA. METHODS A systematic search was conducted using the databases PubMed, EMBASE, Web of Science, and Cochrane Library until June 2022. Full-text articles reporting associations of preoperative psychological factors with acute pain within 48 h of TKA or THA surgery were identified. Quality was assessed using the Quality in Prognostic Studies tool. RESULTS Eighteen studies containing 16 unique study populations were included. TKA was the most common procedure, and anxiety and depression were the most evaluated psychological metrics. Several different anesthetic techniques and analgesic regimens were used. The studies were generally rated as having a low to moderate risk of bias. Catastrophizing was associated with acute pain in six studies (of nine), mainly after TKA. In contrast, three studies (of 13) and two studies (of 13) found anxiety and depression, respectively, to be associated with acute postoperative pain. CONCLUSION Pain catastrophizing seemed to be the most consistent psychological predictor of acute postoperative pain after TKA. The results for other psychological factors and THA were inconsistent. However, the interpretation of results was limited by considerable methodological heterogeneity.
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Affiliation(s)
- Anders H Springborg
- Department of Anesthesiology, Copenhagen University Hospital-Amager and Hvidovre, Hvidovre, Denmark
| | - Lasse Visby
- Department of Anesthesiology, Copenhagen University Hospital-Amager and Hvidovre, Hvidovre, Denmark
| | - Henrik Kehlet
- Section of Surgical Pathophysiology, Copenhagen University Hospital, Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Nicolai B Foss
- Department of Anesthesiology, Copenhagen University Hospital-Amager and Hvidovre, Hvidovre, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
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4
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Pitaro NL, Herrera MM, Alasadi H, Shah KC, Kiani SN, Stern BZ, Zubizarreta N, Chen DD, Hayden BL, Poeran J, Moucha CS. Sleep Disturbance Trends in the Short-Term Postoperative Period for Patients Undergoing Total Joint Arthroplasty. J Am Acad Orthop Surg 2023; 31:e859-e867. [PMID: 37523691 DOI: 10.5435/jaaos-d-23-00059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 06/21/2023] [Indexed: 08/02/2023] Open
Abstract
BACKGROUND Patients undergoing total joint arthroplasty (TJA) often experience preoperative/postoperative sleep disturbances. Although sleep quality generally improves > 6 months after surgery, patterns of sleep in the short-term postoperative period are poorly understood. This study sought to (1) characterize sleep disturbance patterns over the 3-month postoperative period and (2) investigate clinical and sociodemographic factors associated with 3-month changes in sleep. METHODS This retrospective analysis of prospectively collected data included 104 primary elective TJA patients. Patients were administered the PROMIS Sleep Disturbance questionnaire preoperatively and at 2 weeks, 6 weeks, and 3 months postoperatively. Median sleep scores were compared between time points using Wilcoxon signed-rank tests, stratified by preoperative sleep impairment. A multivariable logistic regression model identified factors associated with 3-month clinically improved sleep. RESULTS The percentage of patients reporting sleep within normal limits increased over time: 54.8% preoperatively and 58.0%, 62.5%, and 71.8% at 2 weeks, 6 weeks, and 3 months post-TJA, respectively. Patients with normal preoperative sleep experienced a transient 4.7-point worsening of sleep at 2 weeks ( P = 0.003). For patients with moderate/severe preoperative sleep impairment, sleep significantly improved by 5.4 points at 2 weeks ( P = 0.002), with improvement sustained at 3 months. In multivariable analysis, patients undergoing total hip arthroplasty (versus knee; OR: 3.47, 95% CI: 1.06 to 11.32, P = 0.039) and those with worse preoperative sleep scores (OR: 1.13, 95% CI: 1.04 to 1.23, P = 0.003) were more likely to achieve clinically improved sleep from preoperatively to 3 months postoperatively. DISCUSSION Patients experience differing patterns in postoperative sleep changes based on preoperative sleep disturbance. Hip arthroplasty patients are also more likely to experience clinically improved sleep by 3 months compared with knee arthroplasty patients. These results may be used to counsel patients on postoperative expectations and identify patients at greater risk of impaired postoperative sleep. STUDY DESIGN Retrospective analysis of prospectively collected data.
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Affiliation(s)
- Nicholas L Pitaro
- From the Leni and Peter W. May Department of Orthopaedic Surgery, Icahn School of Medicine at Mount Sinai, New York, NY (Pitaro, Herrera, Alasadi, Shah, Kiani, Stern, Zubizarreta, Chen, Hayden, Poeran, and Moucha), the Department of Population Health Science and Policy, Institute for Health Care Delivery Science, Icahn School of Medicine at Mount Sinai (Stern, Zubizarreta and Poeran), and the Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY (Poeran)
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5
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Puch Oernskov M, Gaspar Santos S, Sohail Asghar M, Wildgaard K. Is intravenous magnesium sulphate a suitable adjuvant in postoperative pain management? - A critical and systematic review of methodology in randomized controlled trials. Scand J Pain 2023; 23:251-267. [PMID: 36473053 DOI: 10.1515/sjpain-2022-0048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 11/10/2022] [Indexed: 12/13/2022]
Abstract
A growing worldwide focus on opioid-free anaesthesia entails multimodal analgesic strategies involving non-opioids such as magnesium sulphate (MgSO4). Several systematic reviews have concluded there is beneficial analgesic effect of MgSO4 administration but do not take considerable heterogeneity among the studies into consideration. Medical literature published until June 2021 was searched in PubMed/Medline, Embase, Central and Web of Science: The final search yielded a total of 5,672 articles. We included only randomised controlled trials assessing the effect of intravenous MgSO4 on opioid consumption and acute postoperative pain when compared to either placebo or standardized analgesic treatment. The primary aim was to compare the homogeneity of essential variables and confounders. A post-hoc meta-analysis demonstrated a reduction in both postoperative morphine consumption (-6.12 mg) and pain score (-12.32 VAS points) in favour of the MgSO4-groups. Data for meta-analysis was missing from 19 studies (45%) on morphine consumption and 29 studies (69%) for pain score, the majority of which reports no effect for either morphine consumption or pain score. The calculated heterogeneity among the included studies was considerable for both outcomes; I 2=91% for morphine consumption and I 2=96% for pain score. Although we found a per se reduction in opioid consumption and pain score, methodological heterogeneity and clinical shortcomings of pre-, intra-, and post anaesthetic data precludes conclusions on clinical importance of intraoperative intravenous MgSO4. In addition, the reduction is likely less than what can be gained from using standardized analgesic treatment.
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Affiliation(s)
- Mark Puch Oernskov
- Department of Anaesthesia, Pain and Respiratory Support, Copenhagen University Hospital Rigshospitalet, Glostrup, Denmark
| | | | | | - Kim Wildgaard
- Department of Anaesthesiology and Herlev Anaesthesia Critical and Emergency Care Science Unit, Copenhagen University Hospital Herlev-Gentofte, Herlev, Denmark
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6
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Sellevold VB, Olsen U, Lindberg MF, Steindal SA, Aamodt A, Lerdal A, Dihle A. "I am accustomed to something in my body causing pain": a qualitative study of knee replacement non-improvers' stories of previous painful and stressful experiences. BMC Musculoskelet Disord 2023; 24:305. [PMID: 37072755 PMCID: PMC10111826 DOI: 10.1186/s12891-023-06423-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 04/12/2023] [Indexed: 04/20/2023] Open
Abstract
BACKGROUND Approximately 20% of total knee arthroplasty patients experience persistent postsurgical pain one year after surgery. No qualitative studies have explored previous stories of painful or stressful life experiences in patients experiencing persistent postsurgical pain after total knee replacement. This study aimed to explore stories of previous painful or stressful experiences in life in a cohort of patients that reported no improvement in pain one year after total knee arthroplasty. METHODS The study employed an explorative-descriptive qualitative design. Data was collected through semi-structured interviews five to seven years after surgery, with patients who reported no improvement in pain-related interference with walking 12 months after total knee replacement. The data was analyzed using qualitative content analysis. RESULTS The sample consisted of 13 women and 10 men with a median age of 67 years at the time of surgery. Prior to surgery, six reported having at least one chronic illness and 16 reported having two or more painful sites. Two main themes were identified in the data analysis: Painful years - the burden of living with long lasting pain, and the burden of living with psychological distress. CONCLUSIONS The participants had severe longlasting knee pain as well as longlasting pain in other locations, in addition to experiences of psychologically stressful life events before surgery. Health personnel needs to address the experience and perception of pain and psychological struggles, and how it influences patients' everyday life including sleeping routines, work- and family life as well as to identify possible vulnerability for persistent postsurgical pain. Identifying and assessing the challenges enables personalized care and support, such as advice on pain management, cognitive support, guided rehabilitation, and coping strategies both pre-and post-surgery.
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Affiliation(s)
- Vibeke Bull Sellevold
- Lovisenberg Diaconal University College, Lovisenberggata 15B, Oslo, 0456, Norway.
- Faculty of Health Sciences, Department of Nursing and Health Promotion, Oslo Metropolitan University, Oslo, Norway.
| | - Unni Olsen
- Department of Public Health Science, Institute of Health and Society, Faculty of Medicine, University of Oslo, Oslo, Norway
- Department of Orthopaedic Surgery, Lovisenberg Diaconal Hospital, Oslo, Norway
| | - Maren Falch Lindberg
- Department of Public Health Science, Institute of Health and Society, Faculty of Medicine, University of Oslo, Oslo, Norway
- Department of Orthopaedic Surgery, Lovisenberg Diaconal Hospital, Oslo, Norway
| | - Simen A Steindal
- Lovisenberg Diaconal University College, Lovisenberggata 15B, Oslo, 0456, Norway
- Institute of Nursing, Faculty of Health Studies, VID Specialized University, Oslo, Norway
| | - Arild Aamodt
- Department of Orthopaedic Surgery, Lovisenberg Diaconal Hospital, Oslo, Norway
| | - Anners Lerdal
- Department of Interdisciplinary Health Sciences, Institute of Health and Society, Faculty of Medicine, University of Oslo, Oslo, Norway
- Department of research, Lovisenberg Diaconal Hospital, Oslo, Norway
| | - Alfhild Dihle
- Faculty of Health Sciences, Department of Nursing and Health Promotion, Oslo Metropolitan University, Oslo, Norway
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7
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McConaghy K, Rullan P, Murray T, Molloy R, Heinberg LJ, Piuzzi NS. Team Approach: Management of Mental Health in Orthopaedic Patients. JBJS Rev 2023; 11:01874474-202302000-00003. [PMID: 36763707 DOI: 10.2106/jbjs.rvw.22.00167] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
» Mental health evaluation should be considered an essential part of the routine preoperative assessment and should be managed by a multidisciplinary team composed of the primary care physician, orthopaedic provider, and behavioral health specialist. » The scientific literature indicates that patients without comorbid psychiatric symptoms and adaptive coping strategies, resilience, and well-managed expectations have improved functional outcomes and satisfaction after orthopaedic procedures. » Psychological issues are multifaceted and require treatment tailored to each individual patient. Therefore, close communication between all members of the care team is required to create and execute the perioperative plan.
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Affiliation(s)
- Kara McConaghy
- Case Western Reserve University School of Medicine, Cleveland, Ohio
| | - Pedro Rullan
- Department of Orthopedic Surgery, Cleveland Clinic, Cleveland, Ohio
| | - Trevor Murray
- Department of Orthopedic Surgery, Cleveland Clinic, Cleveland, Ohio
| | - Robert Molloy
- Department of Orthopedic Surgery, Cleveland Clinic, Cleveland, Ohio
| | - Leslie J Heinberg
- Department of Psychiatry and Psychology, Cleveland Clinic, Cleveland, Ohio
| | - Nicolas S Piuzzi
- Department of Orthopedic Surgery, Cleveland Clinic, Cleveland, Ohio.,Department of Biomedical Engineering, Cleveland Clinic, Cleveland, Ohio.,Department of Orthopaedic Surgery, Cleveland Clinic, Cleveland, Ohio
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8
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Sellevold VB, Steindal SA, Lindberg MF, Småstuen MC, Aamodt A, Lerdal A, Dihle A. Many Patients With Persistent Pain 1 Year After TKA Report Improvement by 5 to 7 Years: A Mixed-methods Study. Clin Orthop Relat Res 2022; 480:2075-2088. [PMID: 35313322 PMCID: PMC9556114 DOI: 10.1097/corr.0000000000002183] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 03/01/2022] [Indexed: 01/31/2023]
Abstract
BACKGROUND Approximately 20% of patients report pain 12 months after TKA. No studies have investigated patients' experiences of living with persistent postsurgical pain 5 to 7 years after TKA by combining a qualitative and quantitative methodology. QUESTION/PURPOSE In a mixed-methods study, we explored patients' experiences of living with persistent pain up to 7 years after primary TKA. We asked: In a subgroup analysis of patients who reported persistent pain 1 year after TKA surgery, how do patients live with persistent pain at the 5- to 7-year postoperative timepoint? METHODS This follow-up study was part of a longitudinal study of pain, symptoms, and health-related quality of life in patients who underwent TKA for osteoarthritis. The present study targeted a subgroup of patients (22% [45 of 202]) identified in the longitudinal study who reported no improvement in pain interference with walking at 12 months after surgery. Inclusion criteria were: all 31 patients in this subgroup who attended their 5-year follow-up at the hospital and lived within a 2-hour drive from the hospital. Eight patients declined or were unable to participate due to illness or death. Hence, the final sample consisted of 23 patients (13 women and 10 men). The participants' mean age at surgery was 66 ± 10 years. There were no differences in sociodemographic baseline data between the 23 included and the 22 excluded participants. A mixed-methods approach was employed, in which the quantitative data were followed up and investigated with qualitative interviews. Instruments used were the Brief Pain Inventory preoperatively, 12 months, and 5 years after surgery, as well as a semistructured interview guide. The individual interviews were conducted at one timepoint 5 to 7 years postsurgery to capture how pain was experienced at that timepoint. The interviews were audiorecorded, transcribed, and analyzed using qualitative content analysis. Meaning units were identified, condensed, and sorted into subthemes that were interpreted and abstracted into themes, guided by the research question. With a small sample, the quantitative analysis focused on descriptive statistics and nonparametric statistics when comparing demographics of included and nonincluded patients. In addition, two multivariate mixed models for repeated measures were employed to estimate within-patient and between-patient variations as well as to assess the effect of time on the pain outcomes. RESULTS Pain with walking decreased from 12 months to 5 years postoperatively (estimated mean score 7 versus 4, difference of means -3 [95% CI -5 to -2]; p < 0.001). Pain with daily activity decreased from 12 months to 5 years postoperatively (estimated mean score 6 versus 3, difference of means -3 [95% CI -4 to -1]; p < 0.001). Pain intensity (average pain) decreased from 12 months to 5 years postoperatively (estimated mean score 5 versus 4, difference of means -1 [95% CI -3 to 0]; p = 0.03). The results are presented as point estimates rounded up to whole numbers. The qualitative data analysis yielded three themes: persistent limitations after TKA, regained wellness over time, and complexity in physical challenges. Intermittent pain with certain movements resulted in limitations with some activities in everyday life and seemed to persist beyond 5 years. Multiple painful body sites and presence of comorbidities seemed to interfere with regained wellness over time. CONCLUSION In this subgroup of patients experiencing postsurgical persistent pain 12 months after primary TKA, persistent postsurgical pain still limited certain activities for the participants, although pain seemed to be less influential in their everyday lives after 5 years to 7 years. Clinicians may use these findings to inform and guide patients with delayed improvements in pain into more realistic expectations for recovery, rehabilitation, and strategies for coping with pain and impaired function. However, it is imperative to rule out other reasons for pain in patients reporting pain 12 months and longer after surgery and to be attentive of possible changes in pain over time. LEVEL OF EVIDENCE Level III, therapeutic study.
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Affiliation(s)
- Vibeke Bull Sellevold
- Lovisenberg Diaconal University College, Oslo, Norway
- Faculty of Health Sciences, Department of Nursing and Health Promotion, Acute and Critical Illness, OsloMet – Oslo Metropolitan University, Oslo, Norway
| | - Simen A. Steindal
- Lovisenberg Diaconal University College, Oslo, Norway
- Faculty of Health Studies, VID Specialized University, Oslo, Norway
| | - Maren Falch Lindberg
- Department of Orthopedics, Lovisenberg Diaconal Hospital, Oslo, Norway
- Department of Nursing Science, Institute of Health and Society, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Milada Cvancarova Småstuen
- Faculty of Health Sciences, Department of Nursing and Health Promotion, Acute and Critical Illness, OsloMet – Oslo Metropolitan University, Oslo, Norway
- Research Department, Lovisenberg Diaconal Hospital, Oslo, Norway
| | - Arild Aamodt
- Department of Orthopedics, Lovisenberg Diaconal Hospital, Oslo, Norway
| | - Anners Lerdal
- Research Department, Lovisenberg Diaconal Hospital, Oslo, Norway
- Department of Interdisciplinary Health Sciences, Institute of Health and Society, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Alfhild Dihle
- Faculty of Health Sciences, Department of Nursing and Health Promotion, Acute and Critical Illness, OsloMet – Oslo Metropolitan University, Oslo, Norway
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9
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Getachew M, Lerdal A, Småstuen MC, Gay CL, Aamodt A, Tesfaye M, Lindberg MF. Worst pain intensity and opioid intake during the early postoperative period were not associated with moderate-severe pain 12 months after total knee arthroplasty - a longitudinal study. Scand J Pain 2022; 23:364-371. [PMID: 35938939 DOI: 10.1515/sjpain-2022-0007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Accepted: 07/05/2022] [Indexed: 11/15/2022]
Abstract
OBJECTIVES There are several known predictors of pain after total knee arthroplasty (TKA). However, it is unclear whether acute postoperative pain intensity and postoperative opioid intake are associated with pain 12 months after TKA. Thus, the aim of this study was to assess whether worst pain intensity and opioid intake during the early postoperative period are associated with moderate-severe pain 12 months after TKA. METHODS A total of 202 patients undergoing primary TKA between October 2012 and September 2014 were prospectively enrolled. Age, sex, contralateral knee pain, BMI, physical status and opioid intake were collected preoperatively. Ketamine and daily opioid intake were collected on postoperative days (POD) 0-3. Using the Brief Pain Inventory, patients' "worst pain intensity" was measured preoperatively, on POD 0-4, and 12 months after TKA. Two logistic regression models evaluated the independent association of early postoperative pain intensity (model 1) and postoperative opioid intake (model 2) with moderate-severe pain 12 months after TKA, adjusting for possible confounders. RESULTS In total, 187 patients with data at the 12 month postoperative follow-up were included in this analysis. Pain intensity on POD2 and POD3, as well as preoperative pain and BMI, were significantly associated with pain at 12 months in univariate models. However, in multivariable models adjusted for preoperative pain and BMI, neither pain intensity on POD 0-4 (model 1) nor opioid intake on POD 0-3 (model 2) were associated with pain at 12 months. Preoperative pain was still significant in both models, but BMI remained significant only in model 2. CONCLUSIONS Worst pain intensity and opioid intake during the early postoperative period were not associated with moderate-severe pain 12 months after TKA when controlling for potential confounders. More research is needed to confirm these findings.
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Affiliation(s)
- Mestawet Getachew
- Department of Clinical Pharmacy, School of Pharmacy, Institute of Health, Jimma University, Jimma, Ethiopia.,Department of Nursing Science, Faculty of Medicine, Institute of Health and Society, University of Oslo, Oslo, Norway
| | - Anners Lerdal
- Department of Interdisciplinary Health Sciences, Institute of Health and Scociety, Faculty of Medicine, University of Oslo, Oslo, Norway.,Research Department, Lovisenberg Diaconal Hospital, Oslo, Norway
| | - Milada Cvancarova Småstuen
- Research Department, Lovisenberg Diaconal Hospital, Oslo, Norway.,Faculty of Health Science, Oslo Metropolitan University, Oslo, Norway
| | - Caryl L Gay
- Research Department, Lovisenberg Diaconal Hospital, Oslo, Norway.,Department of Family Health Care Nursing, University of California, San Francisco, CA, USA
| | - Arild Aamodt
- Department of Orthopaedic Surgery, Lovisenberg Diaconal Hospital, Oslo, Norway
| | - Million Tesfaye
- Department of Anesthesiology, Faculty of Medicine, Institute of Health, Jimma University, Jimma, Ethiopia
| | - Maren Falch Lindberg
- Department of Nursing Science, Faculty of Medicine, Institute of Health and Society, University of Oslo, Oslo, Norway.,Department of Orthopaedic Surgery, Lovisenberg Diaconal Hospital, Oslo, Norway
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10
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Granot M, Srulovici E, Granovsky Y, Yarnitsky D, Kuperman P. Dispositional and situational personal features and acute post-collision head and neck pain: Double mediation of pain catastrophizing and pain sensitivity. PLoS One 2022; 17:e0262076. [PMID: 35007302 PMCID: PMC8746745 DOI: 10.1371/journal.pone.0262076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 12/17/2021] [Indexed: 11/23/2022] Open
Abstract
Pain variability can be partially attributed to psycho-cognitive features involved in its processing. However, accumulating research suggests that simple linear correlation between situational and dispositional factors may not be sufficiently explanatory, with some positing a role for mediating influences. In addition, acute pain processing studies generally focus on a post-operative model with less attention provided to post-traumatic injury. As such, this study aimed to investigate a more comprehensive pain processing model that included direct and indirect associations between acute pain intensity in the head and neck, pain catastrophizing (using pain catastrophizing scale (PCS)), and pain sensitivity (using the pain sensitivity questionnaire (PSQ)), among 239 patients with post-motor vehicle collision pain. The effect of personality traits (using Ten Items Personality Inventory (TIPI)) and emotional status (using Hospital Anxiety and Depression Scale (HADS) and Perceived Stress Scale (PSS)) on that model was examined as well. To this end, three Structural Equation Modeling (SEM) analyses were conducted. Overall, the data had good fit to all the models, with only PSQ found to have a direct correlation with acute pain intensity. The SEM analyses conversely revealed several mediations. Specifically, that: first, PSQ fully mediated the relationship between PCS and pain intensity; second, PCS and PSQ together fully mediated the relationship between conscientiousness (personality trait) and pain intensity; and finally, emotional status had direct and indirect links with PSQ and pain intensity. In conclusion, these models suggest that during the acute post-collision phase, pain sensitivity intermediates between emotional states and personality traits, partially via elevated pain catastrophizing thoughts.
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Affiliation(s)
- Michal Granot
- Department of Nursing, University of Haifa, Haifa, Israel
| | | | - Yelena Granovsky
- Faculty of Medicine, Technion- Israel Institute of Technology, Haifa, Israel
| | - David Yarnitsky
- Faculty of Medicine, Technion- Israel Institute of Technology, Haifa, Israel
- Department of Neurology, Rambam Health Care Campus, Haifa, Israel
| | - Pora Kuperman
- Department of Neurology, Rambam Health Care Campus, Haifa, Israel
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11
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Green S, Karunakaran KD, Labadie R, Kussman B, Mizrahi-Arnaud A, Morad AG, Berry D, Zurakowski D, Micheli L, Peng K, Borsook D. fNIRS brain measures of ongoing nociception during surgical incisions under anesthesia. NEUROPHOTONICS 2022; 9:015002. [PMID: 35111876 PMCID: PMC8794294 DOI: 10.1117/1.nph.9.1.015002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 12/10/2021] [Indexed: 06/14/2023]
Abstract
Significance: Functional near-infrared spectroscopy (fNIRS) has evaluated pain in awake and anesthetized states. Aim: We evaluated fNIRS signals under general anesthesia in patients undergoing knee surgery for anterior cruciate ligament repair. Approach: Patients were split into groups: those with regional nerve block (NB) and those without (non-NB). Continuous fNIRS measures came from three regions: the primary somatosensory cortex (S1), known to be involved in evaluation of nociception, the lateral prefrontal cortex (BA9), and the polar frontal cortex (BA10), both involved in higher cortical functions (such as cognition and emotion). Results: Our results show three significant differences in fNIRS signals to incision procedures between groups: (1) NB compared with non-NB was associated with a greater net positive hemodynamic response to pain procedures in S1; (2) dynamic correlation between the prefrontal cortex (PreFC) and S1 within 1 min of painful procedures are anticorrelated in NB while positively correlated in non-NB; and (3) hemodynamic measures of activation were similar at two separate time points during surgery (i.e., first and last incisions) in PreFC and S1 but showed significant differences in their overlap. Comparing pain levels immediately after surgery and during discharge from postoperative care revealed no significant differences in the pain levels between NB and non-NB. Conclusion: Our data suggest multiple pain events that occur during surgery using devised algorithms could potentially give a measure of "pain load." This may allow for evaluation of central sensitization (i.e., a heightened state of the nervous system where noxious and non-noxious stimuli is perceived as painful) to postoperative pain levels and the resulting analgesic consumption. This evaluation could potentially predict postsurgical chronic neuropathic pain.
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Affiliation(s)
- Stephen Green
- Boston Children’s Hospital, Harvard Medical School, The Center for Pain and the Brain, Department of Anesthesiology, Critical Care and Pain Medicine, Boston, Massachusetts, United States
| | - Keerthana Deepti Karunakaran
- Boston Children’s Hospital, Harvard Medical School, The Center for Pain and the Brain, Department of Anesthesiology, Critical Care and Pain Medicine, Boston, Massachusetts, United States
| | - Robert Labadie
- Boston Children’s Hospital, Harvard Medical School, The Center for Pain and the Brain, Department of Anesthesiology, Critical Care and Pain Medicine, Boston, Massachusetts, United States
| | - Barry Kussman
- Boston Children’s Hospital, Harvard Medical School, Division of Cardiac Anesthesia, Department of Anesthesiology, Critical Care and Pain Medicine, Boston, Massachusetts, United States
| | - Arielle Mizrahi-Arnaud
- Boston Children’s Hospital, Harvard Medical School, Division of Perioperative Anesthesia, Department of Anesthesiology, Critical Care and Pain Medicine, Boston, Massachusetts, United States
| | - Andrea Gomez Morad
- Boston Children’s Hospital, Harvard Medical School, Division of Perioperative Anesthesia, Department of Anesthesiology, Critical Care and Pain Medicine, Boston, Massachusetts, United States
| | - Delany Berry
- Boston Children’s Hospital, Harvard Medical School, The Center for Pain and the Brain, Department of Anesthesiology, Critical Care and Pain Medicine, Boston, Massachusetts, United States
| | - David Zurakowski
- Boston Children’s Hospital, Harvard Medical School, Division of Biostatistics, Department of Anesthesiology, Critical Care and Pain Medicine, Boston, Massachusetts, United States
| | - Lyle Micheli
- Boston Children’s Hospital, Harvard Medical School, Sports Medicine Division, Department of Orthopedic Surgery, Boston, Massachusetts, United States
| | - Ke Peng
- Université de Montréal, Département en Neuroscience, Centre de Recherche du CHUM, Montréal, Quebec, Canada
| | - David Borsook
- Massachusetts General Hospital, Harvard Medical School, Departments of Psychiatry and Radiology, Boston, Massachusetts, United States
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12
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Giusti EM, Lacerenza M, Gabrielli S, Manzoni GM, Manna C, D'Amario F, Marcacci M, Castelnuovo G. Psychological factors and trajectories of post-surgical pain: A longitudinal prospective study. Pain Pract 2021; 22:159-170. [PMID: 34498384 DOI: 10.1111/papr.13074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A significant proportion of patients do not experience relief from pain during the early postsurgical period after joint arthroplasty and are at risk for developing chronic pain. The objectives of this study were to identify biopsychosocial factors associated with acute postsurgical pain trajectories and with pain intensity and interference after 1, 3, and 12 months. Two hundred ten patients listed for joint arthroplasty filled a presurgical battery of questionnaires assessing presurgical pain intensity, catastrophizing, emotional distress, state anxiety and depression, self-efficacy, central sensitization, and executive functions. From the day after surgery, they were asked to fill a 7-day diary, including questions about postsurgical pain and postsurgical state catastrophizing. Finally, they provided data about pain intensity and interference after 1, 3, and 12 months. Predictors of acute pain trajectories were investigated using multilevel growth curve analysis. Results showed that central sensitization was a predictor of the intercept of pain trajectories and daily postsurgical catastrophizing was a significant covariate of pain intensity in the acute phase. Analyses of follow-up data showed that central sensitization was a predictor of pain intensity and pain interference at 3 and 12 months, that emotional distress was related with pain intensity and interference at 1 month, and with pain interference at 3 months, and that cognitive flexibility was associated with pain interference at 1 month. Assessment of these factors could enable to identify patients at risk for worse outcomes and to plan targeted treatments to be implemented during the patient's inward stay.
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Affiliation(s)
- Emanuele M Giusti
- Department of Psychology, Catholic University of Milan, Milan, Italy.,Psychology Research Laboratory, Istituto Auxologico Italiano IRCCS, Milan, Italy
| | - Marco Lacerenza
- Neurology and Pain Services, IRCCS Humanitas Research Hospital, Humanitas San Pio X, Milan, Italy
| | | | | | - Chiara Manna
- Department of Psychology, Catholic University of Milan, Milan, Italy
| | - Federico D'Amario
- IRCCS Humanitas Research Hospital, Humanitas San Pio X, Milan, Italy
| | - Maurilio Marcacci
- Department of Biomedical Sciences, Humanitas University, Milan, Italy.,Humanitas Clinical and Research Center, Milan, Italy
| | - Gianluca Castelnuovo
- Psychology Research Laboratory, Istituto Auxologico Italiano IRCCS, Verbania, Italy
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13
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Fonseca-Rodrigues D, Rodrigues A, Martins T, Pinto J, Amorim D, Almeida A, Pinto-Ribeiro F. Correlation between pain severity and levels of anxiety and depression in osteoarthritis patients: a systematic review and meta-analysis. Rheumatology (Oxford) 2021; 61:53-75. [PMID: 34152386 DOI: 10.1093/rheumatology/keab512] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVES Osteoarthritis (OA) is a chronic degenerative musculoskeletal disease that causes articular damage and chronic pain, with a prevalence of up to 50% in individuals >60 years of age. Patients suffering from chronic painful conditions, including OA, also frequently report anxiety or depression. A systematic review and meta-analysis were performed to assess the correlation between pain severity and depressive and anxious symptomatology in OA patients. METHODS A systematic search was conducted using four databases (PubMed, Medline, Scopus, and Web of Science) from inception up to 14th January of 2020. We included original articles evaluating pain severity and anxiety and/or depression severity in OA-diagnosed patients. Detailed data were extracted from each study, including patients' characteristics and pain, anxiety, and depression severity. When available, the Pearson correlation coefficient between pain and depression severity and pain and anxiety severity was collected and a meta-analysis of random effects was applied. RESULTS This systematic review included 121 studies, with a total of 38085 participants. The mean age was 64.3 years old and subjects were predominantly female (63%). The most used scale to evaluate pain severity was the Western Ontario and the McMaster Universities Osteoarthritis Index, while for anxiety and depression, the Hospital Anxiety and Depression Scale was the most used. The meta-analysis showed a moderate positive correlation between pain severity and both anxious (r = 0.31, p < 0.001) and depressive symptomatology (r = 0.36, p < 0.001). CONCLUSIONS Our results demonstrate a significant correlation between pain and depression/anxiety severity in OA patients, highlighting the need for its routine evaluation by clinicians.
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Affiliation(s)
- Diana Fonseca-Rodrigues
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - André Rodrigues
- School of Medicine, University of Minho, Braga, Portugal.,Anesthesiology Department, Coimbra Hospital and Universitary Centre (CHUC), Praceta Prof. Mota Pinto, Coimbra, Portugal
| | - Teresa Martins
- School of Medicine, University of Minho, Braga, Portugal
| | - Joana Pinto
- School of Medicine, University of Minho, Braga, Portugal
| | - Diana Amorim
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Armando Almeida
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal.,School of Medicine, University of Minho, Braga, Portugal
| | - Filipa Pinto-Ribeiro
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal.,School of Medicine, University of Minho, Braga, Portugal
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14
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Abstract
OBJECTIVE Define and contrast acute pain trajectories vs. the aggregate pain measurements, summarize appropriate linear and nonlinear statistical analyses for pain trajectories at the patient level, and present methods to classify individual pain trajectories. Clinical applications of acute pain trajectories are also discussed. SETTING In 2016, an expert panel involving the Analgesic, Anesthetic, and Addiction Clinical Trial Translations, Innovations, Opportunities, and Networks (ACTTION), American Pain Society (APS), and American Academy of Pain Medicine (AAPM) established an initiative to create a pain taxonomy, named the ACTTION-APS-AAPM Pain Taxonomy (AAAPT), for the multidimensional classification of acute pain. The AAAPT panel commissioned the present report to provide further details on analysis of the individual acute pain trajectory as an important component of comprehensive pain assessment. METHODS Linear mixed models and nonlinear models (e.g., regression splines and polynomial models) can be applied to analyze the acute pain trajectory. Alternatively, methods for classifying individual pain trajectories (e.g., using the 50% confidence interval of the random slope approach or using latent class analyses) can be applied in the clinical context to identify different trajectories of resolving pain (e.g., rapid reduction or slow reduction) or persisting pain. Each approach has advantages and disadvantages that may guide selection. Assessment of the acute pain trajectory may guide treatment and tailoring to anticipated symptom recovery. The acute pain trajectory can also serve as a treatment outcome measure, informing further management. CONCLUSIONS Application of trajectory approaches to acute pain assessments enables more comprehensive measurement of acute pain, which forms the cornerstone of accurate classification and treatment of pain.
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Affiliation(s)
- Emine O Bayman
- Department of Biostatistics, University of Iowa College of Public Health, Iowa City, Iowa, USA.,Department of Anesthesia, University of Iowa, Iowa City, Iowa, USA
| | - Jacob J Oleson
- Department of Biostatistics, University of Iowa College of Public Health, Iowa City, Iowa, USA
| | - Jennifer A Rabbitts
- Department of Anesthesiology & Pain Medicine, University of Washington, Seattle, Washington, USA.,Center for Clinical and Translational Research, Seattle Children's Hospital, Seattle, Washington, USA
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15
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Rocchi M, Stagni C, Govoni M, Mazzotta A, Vivarelli L, Orlandi Magli A, Perrone M, Benedetti MG, Dallari D. Comparison of a fast track protocol and standard care after hip arthroplasty in the reduction of the length of stay and the early weight-bearing resumption: study protocol for a randomized controlled trial. Trials 2021; 22:348. [PMID: 34001185 PMCID: PMC8130396 DOI: 10.1186/s13063-021-05314-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 05/05/2021] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND To date, hip arthroplasty is one of the most commonly performed surgical procedures, with growing worldwide demand. In recent decades, major progress made in terms of surgical technique, biomechanics, and tribology knowledge has contributed to improve the medical and functional management of the patient. This study aims to assess if the application of a fast track protocol, consisting of a preoperative educational intervention, adequate postoperative pain control, and intensive rehabilitation intervention, reduces the length of stay (LOS) and allows the early functional recovery compared to standard clinical practice for patients undergoing hip arthroplasty. METHODS The study population consists of 90 patients with primary arthrosis of the hip with an anterior indication of hip arthroplasty. The exclusion criteria are older than 70 years, a contraindication to performing spinal anesthesia, and bone mass index (BMI) greater than 32. Participants, 45 for each group, are randomly allocated to one of two arms: fast track clinical pathway or standard care protocol. During allocation, baseline parameters such as Harris Hip Score (HHS) and Western Ontario and McMaster Universities (WOMAC) index are collected. On the third postoperative day, the functional autonomy for each patient is assessed by the Iowa Level of Assistance (ILOA) scale, and it is expected the discharge for patients in the fast track group (primary outcome). On the other hand, standard care patient discharge is expected after 5-7 days after surgery. During follow-up fixed at 6 weeks and 3, 6, and 12 months, HHS and WOMAC scores are collected for each patient (secondary outcomes). DISCUSSION Although total hip replacement has become a widespread standardized procedure, to the authors' knowledge, only few randomized controlled trials were performed to evaluate the effectiveness of fast track pathway vs. standard care procedure in the reduction of the LOS after hip arthroplasty. It is expected that our results collected by the application of minimally invasive surgical interventions with concomitant management of perioperative pain and bleeding and early functional rehabilitation will contribute to enriching the understanding of clinical and organizational aspects linked to fast track arthroplasty. TRIAL REGISTRATION ClinicalTrials.gov NCT03875976 . Registered on 15 March 2019-"retrospectively registered".
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Affiliation(s)
- Martina Rocchi
- Reconstructive Orthopaedic Surgery and Innovative Techniques - Musculoskeletal Tissue Bank, IRCCS Istituto Ortopedico Rizzoli, Via G.C. Pupilli 1, 40136 Bologna, Italy
| | - Cesare Stagni
- Reconstructive Orthopaedic Surgery and Innovative Techniques - Musculoskeletal Tissue Bank, IRCCS Istituto Ortopedico Rizzoli, Via G.C. Pupilli 1, 40136 Bologna, Italy
| | - Marco Govoni
- Reconstructive Orthopaedic Surgery and Innovative Techniques - Musculoskeletal Tissue Bank, IRCCS Istituto Ortopedico Rizzoli, Via G.C. Pupilli 1, 40136 Bologna, Italy
| | - Alessandro Mazzotta
- Reconstructive Orthopaedic Surgery and Innovative Techniques - Musculoskeletal Tissue Bank, IRCCS Istituto Ortopedico Rizzoli, Via G.C. Pupilli 1, 40136 Bologna, Italy
| | - Leonardo Vivarelli
- Reconstructive Orthopaedic Surgery and Innovative Techniques - Musculoskeletal Tissue Bank, IRCCS Istituto Ortopedico Rizzoli, Via G.C. Pupilli 1, 40136 Bologna, Italy
| | - Antonella Orlandi Magli
- Physical Medicine and Rehabilitation Unit, IRCCS Istituto Ortopedico Rizzoli, Via G.C. Pupilli 1, 40136 Bologna, Italy
| | - Mariada Perrone
- Anesthesia, Intensive Care and Pain Therapy, IRCCS Istituto Ortopedico Rizzoli, Via G.C. Pupilli 1, 40136 Bologna, Italy
| | - Maria Grazia Benedetti
- Physical Medicine and Rehabilitation Unit, IRCCS Istituto Ortopedico Rizzoli, Via G.C. Pupilli 1, 40136 Bologna, Italy
| | - Dante Dallari
- Reconstructive Orthopaedic Surgery and Innovative Techniques - Musculoskeletal Tissue Bank, IRCCS Istituto Ortopedico Rizzoli, Via G.C. Pupilli 1, 40136 Bologna, Italy
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16
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Lindberg MF, Miaskowski C, Rustøen T, Cooper BA, Aamodt A, Lerdal A. Preoperative risk factors associated with chronic pain profiles following total knee arthroplasty. Eur J Pain 2020; 25:680-692. [PMID: 33259681 PMCID: PMC7986219 DOI: 10.1002/ejp.1703] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 11/22/2020] [Indexed: 12/16/2022]
Abstract
Background One in five patients experience chronic pain 12 months following total knee arthroplasty (TKA). This longitudinal study used a person‐centred approach to identify subgroups of patients with distinct chronic pain profiles following TKA and identified preoperative characteristics associated with these profiles. Methods On the day before surgery, 202 patients completed questionnaires that assessed pain, interference with functioning, fatigue, anxiety, depression and illness perceptions. Average and worst pain were assessed prior to surgery, on postoperative day 4, at 6 week and at 3 and 12 months following surgery. Using growth mixture modelling, two subgroups with distinct average and worst pain profiles were identified. Results Patients in the “lower average” and “lower worst” pain classes had moderate preoperative pain scores that decreased over the remaining 9 months following TKA. Patients in the “higher average” and “higher worst” pain classes had relatively higher preoperative pain scores that increased during the first three months and then decreased slightly over the remaining 9 months. Patients in the higher pain classes had higher interference with function scores; used opioids prior to surgery more often, were more likely to receive a continuous nerve block and ketamine; had higher preoperative fatigue severity and interference scores; and had worse perceptions of illness than patients in the lower pain classes. Conclusions These risk factors may be used to identify subgroups of patients at higher risk for more severe pain after TKA. Future studies should test whether modifying these risk factors can improve patients’ outcomes after TKA. Significance statement The present study provides a novel and original analysis of pain profiles following total knee arthroplasty that may contribute to our understanding of the transition from acute to chronic pain. Our results may be used to identify patients at higher risk for poorer outcomes based on preoperative risk factors.
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Affiliation(s)
- Maren F Lindberg
- Department of Orthopaedic Surgery, Lovisenberg Diaconal Hospital, Oslo, Norway.,Department of Nursing Science, Institute of Health and Society, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Christine Miaskowski
- School of Nursing, University of California San Francisco, San Francisco, CA, USA
| | - Tone Rustøen
- Department of Nursing Science, Institute of Health and Society, Faculty of Medicine, University of Oslo, Oslo, Norway.,Department of Research and Development, Division of Emergencies and Critical Care, Oslo University Hospital, Oslo, Norway
| | - Bruce A Cooper
- School of Nursing, University of California San Francisco, San Francisco, CA, USA
| | - Arild Aamodt
- Department of Orthopaedic Surgery, Lovisenberg Diaconal Hospital, Oslo, Norway
| | - Anners Lerdal
- Department of Orthopaedic Surgery, Lovisenberg Diaconal Hospital, Oslo, Norway.,Department of Interdisciplinary Health Sciences, Institute of Health and Society, Faculty of Medicine, University of Oslo, Oslo, Norway
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17
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Rehman Y, Lindberg MF, Arnljot K, Gay CL, Lerdal A, Aamodt A. More Severe Radiographic Osteoarthritis Is Associated With Increased Improvement in Patients' Health State Following a Total Knee Arthroplasty. J Arthroplasty 2020; 35:3131-3137. [PMID: 32650959 DOI: 10.1016/j.arth.2020.06.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Revised: 05/19/2020] [Accepted: 06/11/2020] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND To assess whether preoperative radiological severity of osteoarthritis (OA) is related to the level of improvement in patients' health state measured 1 year after total knee arthroplasty (TKA). METHODS Radiographic severity of OA was graded using the Kellgren-Lawrence (KL) classification. Two independent observers were blinded to patients' outcome scores. Health-related quality of life was measured using EQ-5D-3L preoperatively and at 12-month follow-up. The 5 dimensions of the EQ-5D were converted into a health state index score. The association between KL grade and improvement in health state score was analyzed using multiple linear regression. RESULTS Among 156 consecutive patients (68% females, mean age 69 years) who underwent primary TKA, 3 knees (2%) were classified as KL grade 2, 115 as KL grade 3 (74%), and 38 as KL grade 4 (24%). Follow-up rate was 77%. There was substantial intra-rater and inter-rater agreement (Cohen's kappa = 0.80 and 0.79). Most patients (64%) had clinically significant improvement in their health state score 1 year after TKA. However, after adjusting for relevant covariates, patients with severe OA (KL grade 4) were found to have significantly more improvement in their health state score than patients with mild or moderate OA (KL grade 2 or 3, respectively). Separate analysis of the 5 EQ-5D dimensions showed that the KL group differences were most evident in the "usual activities" and "pain/discomfort" dimensions. CONCLUSION Patients with severe OA have significantly more improvement in their usual activities and pain/discomfort 1 year after TKA than patients with less severe OA.
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Affiliation(s)
- Yasser Rehman
- Department of Orthopaedic Surgery, Lovisenberg Diaconal Hospital, Oslo, Norway; Institute of Health and Society, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Maren F Lindberg
- Department of Orthopaedic Surgery, Lovisenberg Diaconal Hospital, Oslo, Norway; Department of Nursing Science, Institute of Health and Society, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Kristine Arnljot
- Department of Radiology, Lovisenberg Diaconal Hospital, Oslo, Norway
| | - Caryl L Gay
- Department of Family Health Care Nursing, University of California, San Francisco, CA; Department of Research and Development, Lovisenberg Diaconal Hospital, Oslo, Norway
| | - Anners Lerdal
- Department of Research and Development, Lovisenberg Diaconal Hospital, Oslo, Norway; Department of Interdisciplinary Health Sciences, Institute of Health and Society, Faculty of Medicine, University of Oslo, Norway
| | - Arild Aamodt
- Department of Orthopaedic Surgery, Lovisenberg Diaconal Hospital, Oslo, Norway
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18
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Getachew M, Lerdal A, Småstuen MC, Gay CL, Aamodt A, Tesfaye M, Lindberg MF. High levels of preoperative pain and fatigue are red flags for moderate-severe pain 12 months after total knee arthroplasty-A longitudinal cohort study. Musculoskeletal Care 2020; 19:186-192. [PMID: 33085181 PMCID: PMC8247059 DOI: 10.1002/msc.1522] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Accepted: 10/07/2020] [Indexed: 12/27/2022]
Abstract
Background Moderate/severe pain after total knee arthroplasty (TKA) is a poor surgical outcome. Many studies have identified preoperative risk factors of pain after TKA, but studies of the joint contributions of co‐occurring symptoms are lacking. Methods Patients undergoing primary TKA (n = 202) were enrolled in a longitudinal cohort study. Preoperatively, patients completed questionnaires measuring demographics and symptoms (pain, fatigue, sleep problems and depression). Pain was re‐assessed 12 months after TKA. Logistic regression analysis was used to compute the probabilities of moderate‐severe pain at 12 months based on preoperative symptom levels, and results were combined into a risk matrix. Results More than one‐third (40%) of patients (n = 187) reported moderate‐severe pain after TKA. Among preoperative risk factors included in the logistic regression analyses were age, sex, pain, fatigue, sleep problems and depression. Adjusting for possible confounders, fatigue (p = 0.02) and pain (p = 0.01) were significant risk factors for moderate‐severe pain at 12‐months follow‐up and were retained in the final risk matrix. The co‐occurrence of high‐preoperative fatigue and pain scores resulted in 57% estimated probability of moderate‐severe pain at 12 months. Similarly, the co‐occurrence of low‐preoperative fatigue and pain scores resulted in 14% estimated probability of moderate‐severe pain 12 months after TKA. Conclusion The combination of high fatigue and pain scores prior to surgery was a key risk factor for moderate‐severe pain 12 months after TKA. Mapping of these factors could be used preoperatively to identify patients who are at risk to experience a poor outcome of TKA.
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Affiliation(s)
- Mestawet Getachew
- Department of Clinical Pharmacy, School of Pharmacy, Institute of Health, Jimma University, Jimma, Ethiopia.,Department of Nursing Science, Institute of Health and Society, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Anners Lerdal
- Department of Interdisciplinary Health Sciences, Faculty of Medicine, Institute of Health and Society, University of Oslo, Oslo, Norway.,Department of Research and Administration, Lovisenberg Diaconal Hospital, Oslo, Norway
| | - Milada Cvancarova Småstuen
- Department of Research and Administration, Lovisenberg Diaconal Hospital, Oslo, Norway.,Faculty of Health Science, Oslo Metropolitan University, Oslo, Norway
| | - Caryl L Gay
- Department of Research and Administration, Lovisenberg Diaconal Hospital, Oslo, Norway.,Department of Family Health Care Nursing, University of California, San Francisco, California, USA
| | - Arild Aamodt
- Department of Orthopaedic Surgery, Lovisenberg Diaconal Hospital, Oslo, Norway
| | - Million Tesfaye
- Department of Anesthesiology, Faculty of Medicine, Institute of Health, Jimma University, Jimma, Ethiopia
| | - Maren Falch Lindberg
- Department of Nursing Science, Institute of Health and Society, Faculty of Medicine, University of Oslo, Oslo, Norway.,Department of Orthopaedic Surgery, Lovisenberg Diaconal Hospital, Oslo, Norway
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19
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The Influence of Preoperative Anxiety, Optimism, and Pain Catastrophizing on Acute Postoperative Pain in Patients Undergoing Cardiac Surgery: A Cross-sectional Study. J Cardiovasc Nurs 2020; 36:454-460. [PMID: 32501863 DOI: 10.1097/jcn.0000000000000687] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Acute postoperative pain (APOP) may cause complications and delay healing. Analgesics alone cannot completely relieve APOP. Preoperative anxiety, optimism, and pain catastrophizing are predictors of APOP. No study author has examined the mediating effect of pain catastrophizing on APOP in patients undergoing cardiac surgery. OBJECTIVE The aims of this study were to investigate the relationship between preoperative anxiety, optimism, pain catastrophizing, confounding factors (age, sex, type of surgery, and preoperative pain), and APOP and to examine the mediating effect of pain catastrophizing. METHODS The authors of this cross-sectional study used a convenience sampling method and included 100 adults undergoing cardiac surgery in a southern Taiwanese medical center. The patients were asked to complete the State-Trait Anxiety Inventory-State subscale, Pain Catastrophizing Scale, and Life Orientation Test-Revised questionnaires before surgery. Postoperatively, the patients were asked to report their pain intensity on a numerical rating scale. Results were analyzed using SPSS version 22. RESULTS Patients had a mild level of anxiety, a moderate level of optimism, and pain catastrophizing before surgery, as well as a moderate level of APOP. Men reported lower levels of APOP than women (z = -2.0, P < .05). APOP was significantly associated with preoperative anxiety (r = 0.48, P < .01), optimism (r = -0.45, P < .01), and pain catastrophizing (r = 0.65, P < .01). Only pain catastrophizing was a significant predictor of APOP (β = 0.60, P < .001) and fully mediated the relationship between anxiety and APOP (z = 4.92, P < .001). The final model explained 42% of the variance in APOP. CONCLUSIONS Pain catastrophizing should be assessed before surgery. Reducing pain catastrophizing would decrease APOP and improve the quality of pain management.
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Bragstad LK, Lerdal A, Gay CL, Kirkevold M, Lee KA, Lindberg MF, Skogestad IJ, Hjelle EG, Sveen U, Kottorp A. Psychometric properties of a short version of Lee Fatigue Scale used as a generic PROM in persons with stroke or osteoarthritis: assessment using a Rasch analysis approach. Health Qual Life Outcomes 2020; 18:168. [PMID: 32503548 PMCID: PMC7275526 DOI: 10.1186/s12955-020-01419-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 05/24/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Fatigue is a common symptom associated with a wide range of diseases and needs to be more thoroughly studied. To minimise patient burden and to enhance response rates in research studies, patient-reported outcome measures (PROM) need to be as short as possible, without sacrificing reliability and validity. It is also important to have a generic measure that can be used for comparisons across different patient populations. Thus, the aim of this secondary analysis was to evaluate the psychometric properties of the Norwegian 5-item version of the Lee Fatigue Scale (LFS) in two distinct patient populations. METHODS The sample was obtained from two different Norwegian studies and included patients 4-6 weeks after stroke (n = 322) and patients with osteoarthritis on a waiting list for total knee arthroplasty (n = 203). Fatigue severity was rated by five items from the Norwegian version of the LFS, rating each item on a numeric rating scale from 1 to 10. Rasch analysis was used to evaluate the psychometric properties of the 5-item scale across the two patient samples. RESULTS Three of the five LFS items ("tired", "fatigued" and "worn out") showed acceptable internal scale validity as they met the set criterion for goodness-of-fit after removal of two items with unacceptable goodness-of-fit to the Rasch model. The 3-item LFS explained 81.6% of the variance, demonstrated acceptable unidimensionality, could separate the fatigue responses into three distinct severity groups and had no differential functioning with regard to disease group. The 3-item version of the LFS had a higher separation index and better internal consistency reliability than the 5-item version. CONCLUSIONS A 3-item version of the LFS demonstrated acceptable psychometric properties in two distinct samples of patients, suggesting it may be useful as a brief generic measure of fatigue severity. TRIAL REGISTRATION Clinicaltrials.gov: NCT02338869; registered 10/04/2014 (stroke study).
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Affiliation(s)
- Line Kildal Bragstad
- Department of Geriatric Medicine, Oslo University Hospital, P.O Box 4956, Ullevaal, Nydalen, 0424, Oslo, Norway. .,Department of Nursing Science and Research Center for Habilitation and Rehabilitation Services and Models (CHARM), University of Oslo, Faculty of Medicine, Institute of Health and Society, P.O. Box 1130, Blindern, N-0318, Oslo, Norway.
| | - Anners Lerdal
- Department of Nursing Science, University of Oslo, Faculty of Medicine, Institute of Health and Society, P.O. Box. 1130, Blindern, N-0318, Oslo, Norway.,Department for Patient Safety and Research, Lovisenberg Diaconal Hospital, P.O. Box 04970, Nydalen, N-0440, Oslo, Norway
| | - Caryl L Gay
- Department for Patient Safety and Research, Lovisenberg Diaconal Hospital, P.O. Box 04970, Nydalen, N-0440, Oslo, Norway.,Department of Family Health Care Nursing, University of California, San Francisco, 2 Koret Way, San Francisco, CA, 94143, USA
| | - Marit Kirkevold
- Department of Nursing Science and Research Center for Habilitation and Rehabilitation Services and Models (CHARM), University of Oslo, Faculty of Medicine, Institute of Health and Society, P.O. Box 1130, Blindern, N-0318, Oslo, Norway
| | - Kathryn A Lee
- Department of Family Health Care Nursing, University of California, San Francisco, 2 Koret Way, San Francisco, CA, 94143, USA
| | - Maren Falch Lindberg
- Department of Nursing Science, University of Oslo, Faculty of Medicine, Institute of Health and Society, P.O. Box. 1130, Blindern, N-0318, Oslo, Norway.,Department for Surgery, Lovisenberg Diaconal Hospital, P.O. Box 04970, Nydalen, N-0440, Oslo, Norway
| | - Ingrid Johansen Skogestad
- Department for Medicine, Lovisenberg Diaconal Hospital, P.O. Box 04970, Nydalen, N-0440, Oslo, Norway
| | - Ellen Gabrielsen Hjelle
- Department of Nursing Science and Research Center for Habilitation and Rehabilitation Services and Models (CHARM), University of Oslo, Faculty of Medicine, Institute of Health and Society, P.O. Box 1130, Blindern, N-0318, Oslo, Norway
| | - Unni Sveen
- Department of Geriatric Medicine, Oslo University Hospital, P.O Box 4956, Ullevaal, Nydalen, 0424, Oslo, Norway.,Faculty of Health Sciences, Oslo Metropolitan University, P.O. Box 4, St. Olavs Plass, N-0130, Oslo, Norway.,Department of Physical Medicine and Rehabilitation, Oslo University Hospital, P.O. Box 4956, Nydalen, N-0424, Oslo, Norway
| | - Anders Kottorp
- Faculty of Health and Society, Malmö University, 205 06, Malmö, Sweden
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Lindberg MF, Schweitz TU, Aamodt A, Gay C, Lerdal A. High pre- and postoperative symptom burden in non-responders to total knee arthroplasty. PLoS One 2020; 15:e0233347. [PMID: 32463834 PMCID: PMC7255594 DOI: 10.1371/journal.pone.0233347] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Accepted: 05/03/2020] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVES One in five patients does not improve in pain with walking (non-responders) 12 months after total knee arthroplasty (TKA). This longitudinal study investigated a broad range of symptoms before and after TKA and evaluated possible differences in symptom distress between responders and non-responders with regards to pain with walking after TKA. METHODS Prior to TKA surgery, 182 patients completed a demographic questionnaire and the Memorial Symptom Assessment Scale-Short Form (MSAS-SF). The MSAS-SF was repeated 12 months following TKA. Clinical data were extracted from medical records. Patients were categorized as responders or non-responders based on their trajectories of pain with walking assessed prior to surgery, on postoperative day 4, at 6 weeks, and at 3 and 12 months. RESULTS Overall, the most distressful preoperative symptoms were pain, lack of energy, difficulty sleeping, feeling drowsy, worrying, feeling bloated, and problems with sexual interest or activity. However, compared with patients classified as responders to TKA, non-responders had higher total symptom distress scores both preoperatively and 12 months postoperatively. Preoperatively, non-responders scored higher than responders on five of the seven most distressing symptoms (i.e., all except difficulty sleeping and feeling bloated), and 12 months postoperatively, non-responders scored higher than responders on six of the seven most distressing symptoms (i.e., all but feeling bloated). In a multivariate analysis, higher preoperative distress scores for pain and problems with sexual interest or activity were significant predictors of non-response to TKA, controlling for other relevant factors. CONCLUSIONS Patients' preoperative symptom burden may be a useful indicator of their risk for non-improvement following TKA surgery. Future studies need to evaluate the effect of reducing patients' preoperative symptom burden on TKA outcomes.
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Affiliation(s)
- Maren Falch Lindberg
- Department of Orthopaedic Surgery, Lovisenberg Diaconal Hospital, Oslo, Norway
- Department of Nursing Science, Faculty of Medicine, Institute of Health and Society, University of Oslo, Oslo, Norway
- * E-mail:
| | | | - Arild Aamodt
- Department of Orthopaedic Surgery, Lovisenberg Diaconal Hospital, Oslo, Norway
| | - Caryl Gay
- Department of Orthopaedic Surgery, Lovisenberg Diaconal Hospital, Oslo, Norway
- Department of Family Health Care Nursing, University of California, San Francisco, California, United States of America
| | - Anners Lerdal
- Department of Research and Administration, Lovisenberg Diaconal Hospital, Oslo, Norway
- Department of Interdisciplinary Health Sciences, Faculty of Medicine, Institute of Health and Society, University of Oslo, Oslo, Norway
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Tarasov DA, Lychagin AV, Yavorovkiy AG, Lipina MM, Tarasova IA. C-reactive protein as marker of post-operative analgesic quality after primary total knee arthroplasty. INTERNATIONAL ORTHOPAEDICS 2020; 44:1727-1735. [PMID: 32300831 DOI: 10.1007/s00264-020-04551-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 03/26/2020] [Indexed: 10/24/2022]
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Prospective pilot study to identify psychological factors influencing peri-operative pain in total knee arthroplasty (TKA). INTERNATIONAL ORTHOPAEDICS 2020; 44:1271-1280. [DOI: 10.1007/s00264-020-04547-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Accepted: 03/19/2020] [Indexed: 12/30/2022]
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Krishna Prasad GV. Post-operative analgesia techniques after total knee arthroplasty: A narrative review. Saudi J Anaesth 2020; 14:85-90. [PMID: 31998025 PMCID: PMC6970359 DOI: 10.4103/sja.sja_494_19] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Accepted: 09/02/2019] [Indexed: 02/06/2023] Open
Abstract
Post-operative knee pain management has become a challenge to provide early relief and pain-free postoperative care to the patient. The major objectives of post-operative analgesic treatment are to reduce opioid requirements, post-operative pain, and adverse events related to opioid intake. This narrative review aimed to document post-operative analgesia techniques after total knee arthroplasty (TKA). The traditional approach involved high-dose opioid-based regimen, though opioid is considered strong analgesic, but are associated with a number of unwanted side effects to seek for alternative techniques. The role of sciatic nerve block in TKA pain is doubtful. Femoral Nerve Block (FNB) is still considered as the gold standard; however, FNB is associated with quadriceps weakness and risk of fall and sciatic block with foot drop. To overcome these drawback more distal nerve block techniques has evolved, namely saphenous nerve block in adductor canal, selective tibial which are claimed to provide comparable analgesia to that of femoral and sciatic nerve block. The combination of pre-emptive and multi-modal analgesia and technically well-delivered regional nerve blocks and postoperative physical therapy are an essential component which not only minimize the side effects of traditional opioid-based analgesia but also speed up functional recovery, increases patient satisfaction, and reduces the overall length of hospitalization and cost.
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Periañez CAH, Diaz MAC, Bonisson PLV, Simino GPR, Barbosa MH, Mattia ALD. RELATIONSHIP OF ANXIETY AND PREOPERATIVE DEPRESSION WITH POST-OPERATIVE PAIN. TEXTO & CONTEXTO ENFERMAGEM 2020. [DOI: 10.1590/1980-265x-tce-2018-0499] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
ABSTRACT Objectiv:e to analyze the relationship of anxiety and depression in the preoperative period with the presence of pain in the postoperative period. Method: cohort study conducted at a university hospital in the state of Minas Gerais (Brazil), between february and July 2017, with 65 patients. A collection instrument was elaborated for the demographic and clinical characteristics. The Hospital Anxiety and Depression Scale was used to assess anxiety and depression; pain intensity was measured using the Verbal Numerical Scale. Data were submitted to descriptive and inferential statistical analysis. Results: according to demographic and clinical characteristics, most patients were female, with a median age of 44 years and surgical specialty of the digestive tract. In the preoperative period, 31 (47.7%) had anxiety, and nine (13.8%), depression. None of the patients reported pain immediately prior to surgery. The incidence of moderate to severe postoperative pain was 32 (49.2%) patients. There was a statistically significant difference in the distribution of patients with postoperative pain in relation to the presence or absence of preoperative anxiety (p value <0.001). There is no statistically significant difference in the distribution of patients with postoperative pain in relation to the presence or absence of preoperative depression (0.733). In multivariate analysis, preoperative anxiety was a predictive factor for postoperative pain. Depression was not a predictive factor of postoperative pain. Conclusion: It was demonstrated that, regardless of the demographic and clinical characteristics of the studied sample, the presence of anxiety in patients in the preoperative period is a predictive factor of postoperative pain.
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Rajapakshe S, Sutherland JM, Wing K, Crump T, Liu G, Penner M, Younger A, Veljkovic A, Redfern K. Health and Quality of Life Outcomes Among Patients Undergoing Surgery for End-Stage Ankle Arthritis. Foot Ankle Int 2019; 40:1129-1139. [PMID: 31215232 DOI: 10.1177/1071100719856888] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND There is little research investigating which aspects of health-related quality of life change following ankle arthrodesis and total ankle replacement surgery. The objective of this study was to report on statistically and clinically relevant changes in multiple dimensions of health-related quality of life among patients undergoing ankle replacement or fusion surgery. METHODS This study was based on a prospective sample of ankle arthrodesis and total ankle replacement patients. Participants complete the Ankle Osteoarthritis Scale, EuroQoL's EQ-5D-3L, the Patient Health Questionnaire-9, and the pain intensity, interference with enjoyment of life, and general activity pain instrument. Instruments were completed preoperatively and postoperatively. Multivariate regression models were used to measure the change in health-related quality of life outcomes, adjusting for demographic, clinical, and health service utilization. RESULTS Participants achieved statistically significant improvements in health-related quality of life in each domain of measurement. The majority of participants reported clinically significant improvement in pain. Mild depressive symptoms were common, and clinically significant improvement in depression symptoms occurred in 22% of patients. Gains in health were more pronounced among participants reporting the worst preoperative health in all domains quality of life measured. CONCLUSIONS Pain showed a clinically important improvement among 64% of participants whereas 22% reported a clinically meaningful improvement in their depression symptoms postoperatively. Clinically significant gains in health-related quality of life were not experienced by all participants in all dimensions. Further research is warranted to better understand the failure of some patients to improve in dimensions of health studied. LEVEL OF EVIDENCE Level III, comparative study.
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Affiliation(s)
- Shanika Rajapakshe
- Centre for Health Services and Policy Research, School of Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada
| | - Jason M Sutherland
- Centre for Health Services and Policy Research, School of Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada
| | - Kevin Wing
- Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Trafford Crump
- Department of Surgery, University of Calgary, Calgary, Alberta, Canada
| | - Guiping Liu
- Centre for Health Services and Policy Research, School of Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada
| | - Murray Penner
- Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Alastair Younger
- Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Andrea Veljkovic
- Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Kate Redfern
- Vancouver Coastal Health Authority, Vancouver, British Columbia, Canada
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Abrecht CR, Cornelius M, Wu A, Jamison RN, Janfaza D, Urman RD, Campbell C, Smith M, Haythornthwaite J, Edwards RR, Schreiber KL. Prediction of Pain and Opioid Utilization in the Perioperative Period in Patients Undergoing Primary Knee Arthroplasty: Psychophysical and Psychosocial Factors. PAIN MEDICINE 2019. [PMID: 29522115 DOI: 10.1093/pm/pny020] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Objective To identify factors associated with pain severity and opioid consumption in the early perioperative period. Design Prospective observational cohort study. Setting Tertiary academic medical center. Subjects Patients with osteoarthritis older than age 45 years undergoing primary total knee replacement at Brigham and Women's Hospital. A total of 126 patients enrolled. Methods Preoperatively, pain questionnaires and quantitative sensory testing were performed on patients to develop a psychosocial and psychophysical profile. Postoperatively, pain scores and opioid consumption were measured as primary end points. Univariate and multiple linear regression analyses were performed to determine the predictive value of these characteristics on perioperative pain scores and opioid consumption. Results Regression analysis revealed several predictors of acute postoperative pain scores including temporal summation of pain (TSP; P = 0.001), body mass index (BMI; P = 0.044), number of previous knee surgeries (P = 0.006), and female gender (P = 0.023). Similarly, predictors of opioid utilization included TSP (P = 0.011), BMI (P = 0.02), age (P = <0.001), and tourniquet time (P = 0.003). Conclusions The only significant, unique predictors of both pain and opioid consumption were TSP, an index of central pain facilitatory processes, and BMI. Interestingly, psychosocial factors, such as catastrophizing and somatization, although correlated with postoperative pain scores and opioid consumption, generally did not independently explain substantial variance in these measures. This study suggests that BMI and quantitative sensory testing, specifically the temporal summation of pain, may provide value in the preoperative assessment of patients undergoing total knee arthroplasty and other surgeries via predicting their level of risk for adverse pain outcomes.
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Affiliation(s)
- Christopher R Abrecht
- Department of Anesthesia and Perioperative Care, University of California San Francisco, San Francisco, California
| | - Marise Cornelius
- Department of Anesthesiology, Perioperative, and Pain Medicine, Brigham and Women's Hospital, Boston, Massachusetts
| | - Albert Wu
- Department of Anesthesiology, Perioperative, and Pain Medicine, Brigham and Women's Hospital, Boston, Massachusetts
| | - Robert N Jamison
- Department of Anesthesiology, Perioperative, and Pain Medicine, Brigham and Women's Hospital, Boston, Massachusetts
| | - David Janfaza
- Department of Anesthesiology, Perioperative, and Pain Medicine, Brigham and Women's Hospital, Boston, Massachusetts
| | - Richard D Urman
- Department of Anesthesiology, Perioperative, and Pain Medicine, Brigham and Women's Hospital, Boston, Massachusetts
| | - Claudia Campbell
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Michael Smith
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jennifer Haythornthwaite
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Robert R Edwards
- Department of Anesthesiology, Perioperative, and Pain Medicine, Brigham and Women's Hospital, Boston, Massachusetts
| | - Kristin L Schreiber
- Department of Anesthesiology, Perioperative, and Pain Medicine, Brigham and Women's Hospital, Boston, Massachusetts
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Sawyer AT, Harris SL, Koenig HG. Illness perception and high readmission health outcomes. Health Psychol Open 2019; 6:2055102919844504. [PMID: 31041109 PMCID: PMC6482662 DOI: 10.1177/2055102919844504] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
This review identified associations between illness perception and health outcomes of patients with a medical diagnosis included in the Hospital Readmissions Reduction Program. Inclusion criteria were English language, use of quantitative methodology, health outcomes specified, and identifiable effect size and statistical significance of the relationship. Most of the 31 studies in this review showed that favorable illness perception has been associated with better health outcomes, while unfavorable illness perception has been associated with worse outcomes. A multifaceted approach might include behavioral, clinical, educational, and psychosocial components to improve one’s illness perception through educative, cognitive-behavioral, or psychodynamic counseling.
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Buvanendran A, Della Valle CJ, Kroin JS, Shah M, Moric M, Tuman KJ, McCarthy RJ. Acute postoperative pain is an independent predictor of chronic postsurgical pain following total knee arthroplasty at 6 months: a prospective cohort study. Reg Anesth Pain Med 2019; 44:rapm-2018-100036. [DOI: 10.1136/rapm-2018-100036] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/01/2018] [Indexed: 12/27/2022]
Abstract
BackgroundApproximately 15% of patients report persistent knee pain despite surgical success following total knee arthroplasty (TKA). The purpose of this study was to determine the association of acute-postsurgical pain (APSP) with chronic postsurgical pain (CPSP) 6 months after TKA controlling for patient, surgical and psychological confounding factors.MethodsAdult patients with osteoarthritis undergoing primary elective tricompartmental TKA, with the operated knee the primary source of preoperative pain, were studied between March 2011 and February 2017. Patients received standard operative management and a perioperative multimodal analgesia regimen. The primary outcome was CPSP at 6 months. The primary variable of interest was the APSP (weighted mean pain score) for 72 hours postoperatively. Patient, surgical and psychological confounders were assessed using binary logistic regression.Results245 cases were analyzed. The incidence of CPSP was 14% (95% CI 10% to 19%). Median APSP values were 4.2 (2.2–5.0) in the CPSP group and 2.8 (1.8–3.7) without CPSP, difference 1.4 (95% CI 0.1 to 1.8, p=0.005). The unadjusted odds for CPSP with an increase of 1 in APSP was 1.46 (95% CI 1.14 to 1.87, p=0.002)). After multivariable risk adjustment, the OR for CPSP for an increase of 1 in the APSP was 1.53 (95% CI 1.12 to 2.09, p=0.008).ConclusionsAPSP is a risk factor for CPSP following TKA even after adjusting for confounding variables such as pain catastrophizing, anxiety, depression and functional status. Studies are needed to determine if APSP is a modifiable risk factor for the development of CPSP.
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Does Psychological Health Influence Hospital Length of Stay Following Total Knee Arthroplasty? A Systematic Review. Arch Phys Med Rehabil 2018; 99:2583-2594. [DOI: 10.1016/j.apmr.2018.03.020] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 03/29/2018] [Indexed: 11/19/2022]
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Sibanda A, Carnes D, Visentin D, Cleary M. A systematic review of the use of music interventions to improve outcomes for patients undergoing hip or knee surgery. J Adv Nurs 2018; 75:502-516. [PMID: 30230564 DOI: 10.1111/jan.13860] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 07/04/2018] [Accepted: 08/30/2018] [Indexed: 12/18/2022]
Abstract
AIM To examine the effectiveness of music as an adjunct treatment for pain, anxiety, and/or postoperative delirium, for patients undergoing hip or knee surgery. BACKGROUND Patients undergoing hip or knee surgery are known to experience pain and anxiety before and after surgery and be prone to postoperative delirium. DESIGN Quantitative systematic review. DATA SOURCES CENTRAL, Embase, Ovid MEDLINE, CINAHL, and PsycINFO databases were systematically searched without time limits (to June 2018). REVIEW METHODS A systematic search yielded 10 randomized controlled trials and quasi-experimental designs. Studies were appraised using the Cochrane Risk of Bias Tool. Data were extracted using the Effective Practice and Organization of Care data extraction tool. RESULTS Mixed results were found for the effect of music on anxiety, pain, and postoperative delirium in patients undergoing hip or knee surgery. Six of 10 included studies provided evidence that music can improve anxiety, pain, or postoperative delirium outcomes for patients undergoing hip or knee surgery. Music effectively reduced anxiety in one of three studies. Three of seven studies reported benefits of music for reducing postoperative pain. Positive effects of music on postoperative delirium were reported in all three studies that evaluated this outcome. Within group improvements were observed in many of the studies. CONCLUSION Music has the potential to improve outcomes of anxiety, pain, and postoperative delirium, for patients undergoing hip or knee surgery. The low number of studies found indicates results should be treated with caution. Further studies are required to provide strong evidence generalizable to a broader population.
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Affiliation(s)
- Annah Sibanda
- School of Health Sciences, College of Health and Medicine, University of Tasmania, Sydney, New South Wales, Australia
| | - Debra Carnes
- Faculty of Education, College of Arts, Law and Education, University of Tasmania, Newnham, Tasmania, Australia
| | - Denis Visentin
- School of Health Sciences, College of Health and Medicine, University of Tasmania, Sydney, New South Wales, Australia
| | - Michelle Cleary
- School of Health Sciences, College of Health and Medicine, University of Tasmania, Sydney, New South Wales, Australia
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Visser MA, Howard KJ, Ellis HB. The Influence of Major Depressive Disorder at Both the Preoperative and Postoperative Evaluations for Total Knee Arthroplasty Outcomes. PAIN MEDICINE 2018; 20:826-833. [DOI: 10.1093/pm/pny107] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
| | | | - Henry B Ellis
- Texas Scottish Rite Sports Medicine Center, Dallas, Texas, USA
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Ge W, Bennett TK, Oller JC. Should high-power posing be integrated in physical therapy? J Phys Ther Sci 2017; 29:697-701. [PMID: 28533612 PMCID: PMC5430275 DOI: 10.1589/jpts.29.697] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 01/10/2017] [Indexed: 11/30/2022] Open
Abstract
[Purpose] Postural assessment and correction is a common approach in patient management
to decrease symptoms and improve function for patients. The purpose of this study was to
determine the effects of high-power posing on muscle strength and pain threshold.
[Subjects and Methods] Thirty-one subjects, 16 females and 15 males, mean age 28.9 (SD
10.8) years old, were recruited through a convenience sampling on the university campus.
The research design was a randomized controlled trial. In the experimental group, the
subjects were instructed to stand in a high-power posture. In the control group, the
subjects were instructed to stand in a low-power posture. Grip strength and pain threshold
measurements were conducted before and after the postural intervention. [Results] The grip
strength changed by −3.4 (−3.7, 0.3) % and 1.7 (−3.6, 5.3) % for the experimental and
control groups, respectively. The pain threshold changed by 0.6 (−9.9, 10.4) % and 15.1
(−9.3, 24.4) % for the experimental and control groups, respectively. However, both
changes were not significant as all the 95% CIs included 0. [Conclusions] The data did not
show significant benefits of high-power posing in increasing grip strength and pain
threshold compared to low-power posing.
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Affiliation(s)
- Weiqing Ge
- Department of Physical Therapy, Youngstown State University, USA
| | - Teale K Bennett
- Department of Physical Therapy, Youngstown State University, USA
| | - Jeremy C Oller
- Department of Physical Therapy, Youngstown State University, USA
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Pinto PR, McIntyre T, Araújo-Soares V, Costa P, Ferrero R, Almeida A. A comparison of predictors and intensity of acute postsurgical pain in patients undergoing total hip and knee arthroplasty. J Pain Res 2017; 10:1087-1098. [PMID: 28533697 PMCID: PMC5431693 DOI: 10.2147/jpr.s126467] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Background Acute pain is an expected result after surgery. Nevertheless, when not appropriately controlled, acute pain has a very negative impact on individual clinical outcomes, impairing healing and recovery, and has clear consequences on health care system costs. Augmenting knowledge on predictors and potentially modifiable determinants of acute postsurgical pain can facilitate early identification of and intervention in patients at risk. However, only a few studies have examined and compared acute pain after total hip arthroplasty (THA) and total knee arthroplasty (TKA). The aim of this study was to compare THA and TKA in acute postsurgical pain intensity and its predictors. Methods A consecutive sample of 124 patients with osteoarthritis (64 undergoing THA and 60 TKA) was assessed 24 hours before (T1) and 48 hours after (T2) surgery. Demographic, clinical, and psychological factors were assessed at T1, and acute postsurgical pain experience was examined at T2. Additionally, the same hierarchical regression analysis was performed separately for each arthroplasty type. Results TKA patients reported higher levels of acute postsurgical pain compared with THA (t=8.490, p=0.004, d=0.527, 95% confidence interval, 0.196–0.878). In the final THA predictive model, presurgical pain was the only variable approaching significant results (t[57]=1.746, β=0.254, p=0.086). In the final TKA predictive model, optimism was the only predictor of pain (t[51]=−2.518, β=−0.339, p=0.015), with emotional representation (t[51]=1.895, β=0.254, p=0.064) presenting a trend toward significance. Conclusion The current study is the first examining THA and TKA differences on acute postsurgical pain intensity and its predictors using a multivariate approach. Results from this study could prove useful for the design of distinct interventions targeting acute postsurgical pain management depending on whether the site of arthroplasty is the hip or the knee. Finally, the current results also support the argument that these two surgeries, at least with regard to acute pain, should be approached separately.
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Affiliation(s)
- Patrícia R Pinto
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga.,ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Teresa McIntyre
- Department of Psychology, Houston Baptist University, Houston, TX, USA
| | - Vera Araújo-Soares
- Institute of Health and Society, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK
| | - Patrício Costa
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga.,ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal.,Faculty of Psychology and Education Sciences, University of Porto, Porto, Portugal
| | - Ramón Ferrero
- Orthopedics Unit, Alto Ave Hospital Center, Guimarães, Portugal
| | - Armando Almeida
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga.,ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
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Lindberg MF, Rustøen T, Miaskowski C, Rosseland LA, Lerdal A. The relationship between pain with walking and self-rated health 12 months following total knee arthroplasty: a longitudinal study. BMC Musculoskelet Disord 2017; 18:75. [PMID: 28183297 PMCID: PMC5301389 DOI: 10.1186/s12891-017-1430-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 01/24/2017] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND A subgroup of patients continue to report pain with walking 12 months after total knee arthroplasty (TKA). The association between walking pain and self-rated health (SRH) after TKA is not known. This prospective longitudinal study aimed to investigate the association between a comprehensive list of preoperative factors, postoperative pain with walking, and SRH 12 months after TKA. METHODS Patients (N = 156) scheduled for TKA completed questionnaires that evaluated demographic and clinical characteristics, symptoms, psychological factors, and SRH. SRH was re-assessed 12 months after TKA. Clinical variables were retrieved from medical records. Pain with walking was assessed before surgery, at 6 weeks, 3, and 12 months after TKA. Subgroups with distinct trajectories of pain with walking over time were identified using growth mixture modeling. Multiple linear regression was used to investigate the relationships between pain with walking and other factors on SRH. RESULTS Higher body mass index, a higher number of painful sites at 12 months, recurrent pain with walking group membership, ketamine use, higher depression scores, and poorer preoperative self-rated health were associated with poorer SRH 12 months after TKA. The final model was statistically significant (p = 0.005) and explained 56.1% of the variance in SRH 12 months after surgery. SRH improved significantly over time. Higher C-reactive protein levels, higher number of painful sites before surgery, higher fatigue severity, and more illness concern was associated with poorer preoperative SRH. CONCLUSIONS In patients whose walking ability decreases over time, clinicians need to assess for unreleaved pain and decreases in SRH. Additional research is needed on interventions to improve walking ability and SRH.
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Affiliation(s)
- Maren Falch Lindberg
- Department of Surgery, Lovisenberg Diakonale Hospital, Pb 4970 Nydalen, 0440, Oslo, Norway.,Department of Nursing Science, Institute of Health and Society, Faculty of Medicine, University of Oslo, Pb 1072 Blindern, 0316, Oslo, Norway
| | - Tone Rustøen
- Department of Nursing Science, Institute of Health and Society, Faculty of Medicine, University of Oslo, Pb 1072 Blindern, 0316, Oslo, Norway.,Department of Research and Development, Division of Emergencies and Critical Care, Oslo University Hospital, Pb 4956 Nydalen, 0424, Oslo, Norway
| | - Christine Miaskowski
- School of Nursing, University of California, San Francisco, UCSF, Box 0610, San Francisco, CA, 94143, USA
| | - Leiv Arne Rosseland
- Department of Research and Development, Division of Emergencies and Critical Care, Oslo University Hospital, Pb 4956 Nydalen, 0424, Oslo, Norway.,Institute of Clinical Medicine, University of Oslo, Pb 1072 Blindern, 0316, Oslo, Norway
| | - Anners Lerdal
- Department of Surgery, Lovisenberg Diakonale Hospital, Pb 4970 Nydalen, 0440, Oslo, Norway. .,Department of Nursing Science, Institute of Health and Society, Faculty of Medicine, University of Oslo, Pb 1072 Blindern, 0316, Oslo, Norway.
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