Acta Orthopaedica最新文献

{"title":"Erratum: Regional variation in low-value musculoskeletal surgery: a nationwide study from the Finnish Care Register.","authors":"Ville Ponkilainen, Anniina Laurema, Ville M Mattila, Teemu Karjalainen","doi":"10.2340/17453674.2024.42413","DOIUrl":"https://doi.org/10.2340/17453674.2024.42413","url":null,"abstract":"<p><p>We would like to inform of an error in the reported incidences in our published article, Regional variation in low-value musculoskeletal surgery: a nationwide study from the Finnish Care Register. Specifically, the incidences for rotator cuff repair, partial meniscectomy, ankle arthroscopy, distal radius fracture fixation, and wrist arthroscopy surgeries were calculated using a too small population size. Accordingly, corrected calculations resulted in higher incidence values for these surgeries, impacting Table 3 and Figure 3, which now show accurate incidence rates. We have also updated Figure 6 and the corresponding sections of the results accordingly. These corrections did not affect any other figures or tables, not the overall conclusions, and the text in the discussion section remains unchanged. The correct data further emphasizes the findings in our original article. We apologize for any confusion caused by these errors and appreciate the opportunity to correct the publication.</p>","PeriodicalId":6916,"journal":{"name":"Acta Orthopaedica","volume":"95 ","pages":"633-638"},"PeriodicalIF":2.5,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11555093/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142611768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Measurement of acute postoperative pain intensity in orthopedic trials: a qualitative concept elicitation study.","authors":"Karen T Bjørnholdt, Carina W G Andersen","doi":"10.2340/17453674.2024.42182","DOIUrl":"10.2340/17453674.2024.42182","url":null,"abstract":"<p><strong>Background and purpose: </strong>Pain intensity is an important outcome in clinical trials of surgery because pain relief is important to patients. Currently, recommended scales are the numeric rating scale 0-10 and visual analogue scale. However, these scales allow for considerable influence of individual imagination, previous experience, and coping skills, limiting proficiency in comparative clinical trials. We aimed to explore postoperative expressions of \"how much it hurts\"-the first step to improve pain intensity measurement.</p><p><strong>Methods: </strong>This was a qualitative study using inductive content analysis: words and visual cues describing pain intensity were collected from (i) existing pain intensity measures by search of COSMIN, PubMed, and Google, (ii) patient interviews recorded and transcribed word-for-word, (iii) clinician interviews transcribed likewise, and (iv) 100 patient telephone interviews with notes taken. After familiarization, the collected expressions were labelled inductively in categories and assembled in tables (case and theme-based matrices).</p><p><strong>Results: </strong>Descriptors fell into 12 categories: intensity (slight/strong), evaluative (negligible/unbearable), cognitive impact (distracting/can be ignored), activity impact (limits some/all activity), sleep impact (can/cannot sleep), examples (like stubbing a toe), physical signs (crying/writhing), associated symptoms (nauseating/tiring), treatment (ice helps/need morphine), affective (annoying/dreadful), discriminative (aching/piercing), and general recovery (hindering recovery/functional interference). Many visual cues were also identified. Literature and recorded interviews gave rise to the categories, and telephone interviews found saturation, providing no further categories.</p><p><strong>Conclusion: </strong>Pain intensity is expressed by terms that fall into 12 categories and by a variety of graphic elements. This advances development of a patient-reported outcome measure of pain intensity for orthopedic trials.</p>","PeriodicalId":6916,"journal":{"name":"Acta Orthopaedica","volume":"95 ","pages":"625-632"},"PeriodicalIF":2.5,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11541802/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142589330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Patient-reported outcome was close to the Danish background population 6 months after non-surgical treatment of Neer 2-part surgical neck fractures: a prospective cohort study in patients aged 60 or above.","authors":"Stig Brorson, Signe A Borg, Line L Houkjær, Kenneth B Holtz, Zaid Issa","doi":"10.2340/17453674.2024.42301","DOIUrl":"10.2340/17453674.2024.42301","url":null,"abstract":"<p><strong>Background and purpose: </strong> Neer 2-part surgical neck fractures are the most common displaced proximal humerus fractures. We aimed to evaluate patient-reported outcome in a consecutive series of older people receiving nonoperative treatment.</p><p><strong>Methods: </strong> This is a single-center prospective cohort study. We included patients aged 60 or above referred to a Danish university hospital. The preregistered protocol followed the recommendations from randomized trials. Patients were followed at the outpatient clinic at 2, 6, and 24 weeks. After 24 weeks, they were evaluated with Oxford Shoulder Score (OSS, 0-48, 48 best) and EuroQoL 5 dimensions, 3 levels (EQ-5D-3L, -0.624 to 1, 1 best). Clinical failure was defined as conversion to surgery or OSS ≤ 24. Population norms were reported to interpret the cohort data, but no formal statistical comparisons between historical cohorts were planned. We used descriptive statistics to report rates and proportions.</p><p><strong>Results: </strong> For 36 months, 268 patients (mean age 76, 79% female) with Neer 2-part surgical neck fractures received non-surgical treatment. After excluding patients with concomitant fractures, dementia, or death, complete follow-up was available for 167 patients. 8 patients (3.0%) had surgery. The mean OSS was 37.2 (SD 8.1), which equals 78% of maximum shoulder function. The norm for the population of the same age and gender was 82%. The mean EQ-5D-3L score was 0.79 (SD 0.16), while the norm for the same-age population was 0.82. 16 (10%) had an OSS score of 24 or below.</p><p><strong>Conclusion: </strong> Non-surgical treatment in older people with Neer 2-part surgical neck fractures resulted after 6 months in patient-reported shoulder function and quality of life close to that of the Danish background population.</p>","PeriodicalId":6916,"journal":{"name":"Acta Orthopaedica","volume":"95 ","pages":"619-624"},"PeriodicalIF":2.5,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11538501/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142581652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Relationship between histological findings of vastus lateralis muscle and function after total hip arthroplasty in patients with hip fracture: a prospective cohort study.","authors":"Suk-Kyoon Song, Ji-Hyun Hwang, Jin-Woo Bae, Hoon-Kyu Oh, Myung-Rae Cho","doi":"10.2340/17453674.2024.42099","DOIUrl":"10.2340/17453674.2024.42099","url":null,"abstract":"<p><strong>Background and purpose: </strong> We aimed to examine the histological characteristics of vastus lateralis muscles in patients undergoing total hip arthroplasty (THA) following femoral neck fractures and to explore the correlation between muscle fiber types and postoperative functional recovery.</p><p><strong>Methods: </strong> 34 patients undergoing THA for femoral neck fractures were included. A biopsy of the vastus lateralis muscle was performed during surgery, followed by immunohistochemical staining. Subsequently, image analysis was conducted to measure the average area of muscle fiber types and the number of type I and II muscle fibers, and the ratio of the area and the number of type II muscle fibers. Functional recovery was assessed 2 weeks post-surgery using the Short Physical Performance Battery (SPPB).</p><p><strong>Results: </strong>A significant positive correlation was observed between type II muscle fibers and SPPB scores. The ratio of type II muscle fiber area and number strongly correlated with the SPPB scores, indicating a robust static association. The average area of type II fibers showed a strong correlation (r = 0.63, P < 0.001), as did the number of type II fibers (r = 0.53, P = 0.001). Moreover, the ratio of type II muscle fiber area and number significantly correlated with SPPB scores (area: r = 0.77, P < 0.001; number: r = 0.51, P = 0.002), indicating that larger and more numerous type II fibers are associated with better physical performance.</p><p><strong>Conclusion: </strong>The reduction of type II muscle fibers was strongly correlated with a low SPPB postoperative functional recovery in patients who underwent THA following femoral neck fractures.</p>","PeriodicalId":6916,"journal":{"name":"Acta Orthopaedica","volume":"95 ","pages":"612-618"},"PeriodicalIF":2.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11519523/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142492587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Factors associated with arthrofibrosis-related revision following 14,325 total or unicompartmental knee arthro-plasties: an analysis from the Dutch Arthroplasty Registry.","authors":"Myrthe P F Van de Ven, Joris Bongers, Anneke Spekenbrink-Spooren, Sander Koëter","doi":"10.2340/17453674.2024.41988","DOIUrl":"https://doi.org/10.2340/17453674.2024.41988","url":null,"abstract":"<p><strong>Background and purpose: </strong> Arthrofibrosis is a fibrotic joint disorder that can impair the results of knee arthroplasty surgery by limiting the range of motion, functionality, and quality of life. We aimed to investigate whether patient and procedural characteristics are associated with arthrofibrosis-related revision following unicompartmental and total knee arthroplasty (UKA and TKA).</p><p><strong>Methods: </strong> A prospective observational study was conducted using data from the Dutch Arthroplasty Registry. We included 14,325 revisions performed in 2014-2022 following primary knee arthroplasty. Demographic and surgical characteristics including age, sex, BMI, smoking status, and prosthesis type (TKA versus UKA) were analyzed. Multiple logistic regression was performed to investigate associations between these factors and arthrofibrosis-related revisions, compared with other reasons.</p><p><strong>Results: </strong> Revisions were due to arthrofibrosis in 711 (5%) patients. There were significantly higher associations for younger age (odds ratio [OR] 0.97, 95% confidence interval [CI] 0.96-0.97)), male sex (OR 1.2, CI 1.0-1.4), lower BMI (OR 0.97, CI 0.95-0.98), non-smoking status (OR 1.7, CI 1.2-2.3), and TKA (OR 7.7, CI 5.2-12), for arthrofibrosis-related revision compared with any other reason for revision.</p><p><strong>Conclusion: </strong>Younger patients, men, non-smokers, patients with a lower BMI, and those who had primary TKA were more often associated with revision due to arthrofibrosis than other reasons for revision.</p>","PeriodicalId":6916,"journal":{"name":"Acta Orthopaedica","volume":"95 ","pages":"607-611"},"PeriodicalIF":2.5,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11475797/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142455387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bado type III Monteggia fractures have a high injury- and treatment-related complication rate: a single center study of 73 fractures.","authors":"Kaj Zilliacus, Yrjänä Nietosvaara, Ilkka Helenius, Niko Kämppä, Ilkka Vuorimies, Petra Grahn","doi":"10.2340/17453674.2024.42111","DOIUrl":"https://doi.org/10.2340/17453674.2024.42111","url":null,"abstract":"<p><strong>Background and purpose: </strong> Monteggia fractures can be problematic injuries. The aim of this population-based study is to evaluate the risk of complications according to the Bado types, clinical outcome, and incidence.</p><p><strong>Methods: </strong> 72 children (median age 6, range 2-11 years) with 73 Monteggia fractures treated during 2014-2022 were identified from the institutional fracture register. Timing of diagnosis, complications, and method of treatment were registered. Outcomes were assessed at mean 4 years (1-9) follow-up in 68 (94%) children. The census population (< 16 years old) in Helsinki metropolitan area during the study period was assessed.</p><p><strong>Results: </strong>Bado types I (n = 43) and III (n = 27) comprised all but 3 of the fractures. Diagnosis was made on admission in 57, and with a 1-8-day delay in 16 children. 8 children had sustained an associated nerve injury. 35 children were treated operatively, 7 after failed closed treatment. 4 reoperations were performed, including 3 ulnar osteotomies. The risk of complications (odds ratio [OR] 4.9, 95% confidence interval [CI] 1.7-14) and closed treatment failures (OR 12.3, CI 1.3-118) was higher in Bado type III than in type I injuries. 60 children attended for clinical follow-up, all had congruent radio-humeral joints and full range of elbow and forearm motion. Mean PedsQL was 94 (72-100) and QuickDash 3 (0-13). 8 additional children reported normal elbow functions by phone. The calculated mean annual incidence of Monteggia injuries was 2.9/100,000 children.</p><p><strong>Conclusion: </strong> Monteggia fractures are rare (2.9/100,000 yearly). Bado type III injuries are associated with a high risk of complications.</p>","PeriodicalId":6916,"journal":{"name":"Acta Orthopaedica","volume":"95 ","pages":"600-606"},"PeriodicalIF":2.5,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11474005/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142455386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metabolic syndrome increases the length of stay and medical complications after hip and knee arthroplasty: results from a prospective cohort study of 2,901 patients.","authors":"Rasmus Reinholdt Sørensen, Signe Timm, Lasse Enkebølle Rasmussen, Claus Lohman Brasen, Claus Varnum","doi":"10.2340/17453674.2024.42112","DOIUrl":"https://doi.org/10.2340/17453674.2024.42112","url":null,"abstract":"<p><strong>Background and purpose: </strong> Metabolic syndrome (MetS) affects more than 60% of the patients having a hip or knee arthroplasty due to osteoarthritis. As it is debated whether metabolic syndrome increases the risk of complications, we aimed to investigate the length of stay (LOS) and risk of readmission at 30 and 90 days after surgery, including causes of readmission.</p><p><strong>Methods: </strong> We conducted a prospective cohort study of 2,901 patients undergoing hip and knee arthroplasty from May 2017 to November 2019. Physical examination, blood samples, and medical history from national registries determined the diagnosis of metabolic syndrome from the International Diabetes Federation definition. We used multivariate linear regression to investigate differences in LOS according to MetS, and binary regression to investigate the risk and causes of readmission within 30 and 90 days, including 95% confidence intervals (CI) and P values.</p><p><strong>Results: </strong> Patients with MetS showed a slightly longer LOS (0.20 days, CI 0.10-0.29) and had an increased risk of readmission within 90 days (adjusted relative risk [RR] 1.2, CI 1.0-1.4; P = 0.02), but not within 30 days (adjusted RR 1.1, CI 0.9-1.4; P = 0.3) after surgery. Cardiovascular disease was the dominant cause of readmission.</p><p><strong>Conclusion: </strong>Although patients with MetS do not experience a clinically relevant longer LOS after hip and knee arthroplasty, they have an increased risk of 90-day readmission mainly due to cardiovascular complications, which should be considered when planning surgical care in this group of patients.</p>","PeriodicalId":6916,"journal":{"name":"Acta Orthopaedica","volume":"95 ","pages":"592-599"},"PeriodicalIF":2.5,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11472761/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142455400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Are some neutral liners more neutral than others? An ex vivo morphological analysis of acetabular liners classified as \"neutral\".","authors":"José Á Ochoa, Perttu S Neuvonen, Jari Hyttinen, Jari Viik, Antti P Eskelinen","doi":"10.2340/17453674.2024.41946","DOIUrl":"10.2340/17453674.2024.41946","url":null,"abstract":"<p><strong>Background and purpose: </strong> In contemporary total hip replacement (THR), dislocation is one of the most common complications. At our institution, the cause of an increase in the dislocation rate was recently reported to be reduced head coverage of a newly introduced neutral liner. We therefore aimed to ascertain whether differences exist in articulating head coverage between the various neutral liners used in contemporary THR. A secondary aim was to utilize coverage measurements to develop a new liner coverage classification.</p><p><strong>Methods: </strong> The articulating head coverage of 25 modular neutral polyethylene liners used in 6 uncemented cup designs from 4 major manufacturers was evaluated. The measurements were performed in a metrology laboratory and a mathematical model was developed to calculate coverage of the articulating surfaces. Further, 1 \"elevated rim\" liner and 1 \"face changing liner\" were included to develop a new liner coverage classification.</p><p><strong>Results: </strong> The articulating head coverage among the studied liners ranged from 167.7° to 194.8°, corresponding to a variation of 27.1°. The variations with different cup and head sizes within each design were smaller (from 1.0° to 5.6°) than those between different designs. Each of the liner designs offered distinct coverage, even though they were all classified as neutral. Based on measurements, a set of descriptive parameters to discriminate different liners in terms of coverage was created.</p><p><strong>Conclusion: </strong> We showed that all neutral liners are not equal - instead, they clearly varied in terms of their actual coverage design. We suggest our set of descriptive parameters called \"hemispheric coverage index values\" be used in discriminating the differences in liner coverage.</p>","PeriodicalId":6916,"journal":{"name":"Acta Orthopaedica","volume":"95 ","pages":"586-591"},"PeriodicalIF":2.5,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11468231/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142399045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polyethylene wear and cup migration of cemented total hip arthroplasty with femoral heads made of oxidized zirconium, steel, or cobalt chromium: a 10-year secondary analysis from a randomized trial using radiostereometry.","authors":"Håkon Greve Johannessen, Geir Hallan, Thomas Kadar, Anne Marie Fenstad, Stein Håkon Låstad Lygre, Kristin Haugan, Paul Johan Høl, Mona Badawy, Benedikt Jonsson, Kari Indrekvam, Arild Aamodt, Ove Furnes","doi":"10.2340/17453674.2024.41945","DOIUrl":"10.2340/17453674.2024.41945","url":null,"abstract":"<p><strong>Background and purpose: </strong>We aimed to evaluate polyethylene (PE) wear, cup migration, and clinical outcome over 10 years in total hip arthroplasties (THA) using different articulations.</p><p><strong>Methods: </strong> This is a secondary analysis of 150 patients randomized into 5 groups, using different articulations: Charnley/Charnley Ogee for steel and conventional polyethylene (CPE), or Spectron EF/Reflection with either CPE or highly cross linked polyethylene (XLPE) cups, paired with heads made of either cobalt-chromium (CoCr) or oxidized zirconium (OxZr). All cups were cemented. Patients underwent repeated radiostereometric analysis (RSA) measurements for up to 10 years to assess wear and migration. Clinical outcome was assessed using Harris Hip Score (HHS).</p><p><strong>Results: </strong> After 10 years, the XLPE cups demonstrated low wear rates: 0.08 mm (95% confidence interval [CI] -0.11 to 0.26 mm) with CoCr heads and 0.06 mm (CI -0.14 to 0.26 mm) with OxZr heads, with a mean difference of 0.01 mm (CI -0.26 to 0.29 mm). In contrast, CPE cups exhibited significantly more wear: 1.35 mm (CI 1.16 to 1.55 mm) with CoCr heads and 1.68 mm (CI 1.44 to 1.92 mm) with OxZr heads, with a mean difference of 0.33 mm (CI 0.02 to 0.64 mm). The Charnley/Ogee group (CPE) showed PE wear of 0.34 mm (CI 0.12 to 0.56 mm). The CPE groups with OxZr and CoCr heads had 0.67 mm (CI 0.38 to 0.96 mm) and 0.35 mm (CI 0.09 to 0.61 mm) greater proximal migration respectively than the corresponding XLPE groups. HHS was similar across all groups.</p><p><strong>Conclusion: </strong> We found no significant advantage of OxZr over CoCr heads in reducing wear or migration. XLPE demonstrated a major reduction in wear as well as a reduction in cup migration compared with CPE. Charnley performed better than the other CPE cups in terms of PE wear and cup migration. No differences in clinical outcome were found.</p>","PeriodicalId":6916,"journal":{"name":"Acta Orthopaedica","volume":"95 ","pages":"578-585"},"PeriodicalIF":2.5,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11441331/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142339006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Can pin-site inflammation be detected with thermographic imaging? A cross-sectional study from the USA and Denmark of patients treated with external fixators.","authors":"Marie Fridberg, Ole Rahbek, Hans-Christen Husum, Bafor Anirejuoritse, Kirsten Duch, Christopher Iobst, Søren Kold","doi":"10.2340/17453674.2024.41901","DOIUrl":"10.2340/17453674.2024.41901","url":null,"abstract":"<p><strong>Background and purpose: </strong> Patients with external fixators are at risk of pin-site infection. A tool for objective monitoring of pin sites for evolving signs of infection is warranted. We aimed to investigate the temperature (MaxTp) difference between clean and visually inflamed pin sites using thermography and to establish the optimal cut-off value of MaxTp using thermography as a screening tool for inflammation detection.</p><p><strong>Methods: </strong> This was a cross-sectional study performed in the USA and Denmark of patients with circular external fixators. Pin sites were visually judged by a surgeon or a nurse as clean or as showing signs of inflammation. The MaxTp was obtained at the pin site by thermographic imaging using an infrared camera (FLIR T540).</p><p><strong>Results: </strong> We included 1,970 pin sites from 83 patients. The mean MaxTp for clean pin sites (n = 1,739) was 33.1°C (95% confidence interval [CI] 32.8-33.4) and the mean MaxTp for visual inflamed pin sites (n = 231) was 34.0°C (CI 33.6-34.3). The mean difference, when adjusted for repeated observations of patients and pin sites, was statistically significant with a difference of 0.9°C (CI 0.7-1.1) (P < 0.001). The area under the receiver operating characteristic curve for MaxTp as a screening tool to detect visual signs of inflammation was 0.71 (CI 0.65-0.76). The empirically optimal cut-off value was 34.1°C with a sensitivity of 65%, a specificity of 72%, a positive predictive value of 23%, and a negative predictive value of 94%.</p><p><strong>Conclusion: </strong> We found a statistically significant difference in mean temperature between pin sites with and without visual signs of inflammation. Thermography could be a promising tool for future point of care technology for monitoring inflammation around pin sites.</p>","PeriodicalId":6916,"journal":{"name":"Acta Orthopaedica","volume":"95 ","pages":"562-569"},"PeriodicalIF":2.5,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11418271/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142278606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}