Introduction. The pain is an important symptom that could be related to alteration of body balance in patients who has osteoarthritis and total knee arthroplasty (TKA). Objective. To analyze the intensity of pain, functionality, muscle strength, static and dynamic balance in patients submitted to TKA and to compare with healthy control. Methods. There were 40 subjects, 20 of them were evaluated in three phases: (1) pre-operatory, (2) 6 months after TKA and (3) 12 months after TKA and 20 others healthy people evaluated in one only moment. The evaluation of pain and functionality were done with Numeric Pain Scale and Western Ontario and McMaster Universities Arthritis Index, respectively. The static body balance was evaluated by stabilometry measuring the oscillating area of the center of pressure oscillating, and average speed of the center of pressure oscillating (AS of CPO). The dynamic balance was assessed through the Star Excursion Balance Test (SEBT). And the strength of the muscles of lower members was measured by a manual dynamometer. Results. The intensity of knee pain of those one submitted to TKA was significantly major in preoperative phase (4,05 ±0,84) when related to six (1,95 ± 0,62; p < 0,0001) and twelve months (1,9 ± 0,64; p < 0,007) after surgery. It was observed significant increase of WOMAC score in operated member at six (26,43 ± 5,508) and twelve months (31,48 ± 3,920) after surgery when compared to preoperative period (52,33 ± 3,98) (p<0,01). In intragroup comparisons in AP direction, the AS of CPO increased significantly, in TKA group, after six months (2,90 mm/s ± 0,36) and after twelve months (2,30 mm/s ± 0,31) when compared to preoperative (1,98 mm/s ± 0,16) (p< 0,05). There was no significant difference in area of CPO in intragroup (p=0,3280) and intergroups (p=0,2236) comparisons. The dynamic balance in intragroup comparisons increased significantly in six months (p=0,001) and twelve months (p<0,01) when compared to preoperative. There was significantly increased of hip and knee muscles in operated patients six and twelve months after surgery comparing to preoperative (p<0,05). When comparing healthy control group to TKA group it was observed a lower pain intensity, better functionality, major muscle strength and static and dynamic balance in control group than preoperative, six and twelve months after surgery (p<0,001). Conclusion. The intensity of pain influence in a negative way the functionality, muscle strength, static and dynamic balance in patients with severe osteoarthritis and TKA related to healthy control. / Introdução. A dor é um sintoma pertinente que pode estar relacionado à alteração do equilíbrio corporal em pacientes portadores de osteoartrose e Artroplastia Total do Joelho (ATJ). Objetivo. Analisar a intensidade da dor, funcionalidade, força muscular, equilíbrio corporal em pacientes submetidos à artroplastia total do joelho (ATJ) e comparar com controles saudáveis. Casuística e Métodos.Participaram do estudo 40 sujeitos, sendo 20 avaliados em três fases: (1) pré-operatório, (2) 6 meses após ATJ e (3) 12 meses após ATJ e 20 sujeitos saudáveis avaliados em um único momento. A avaliação da dor e funcionalidade foi realizada através da Escala Numérica de Dor (NRS) e do Western Ontario and McMaster Universities Arthritis Index (WOMAC), respectivamente. O equilíbrio corporal estático foi avaliado por meio de estabilometria, mensurando-se área de oscilação do centro de oscilação de pressão (área do COP) e velocidade média do centro de oscilação de pressão (VM do COP).O equilíbrio dinâmico foi avaliado através do Star Excursion Balance Test (SEBT). E a força dos músculos dos membros inferiores foi mensurada através de um dinamômetro manual. Resultados.A intensidade da dor no joelho dos sujeitos submetidos a ATJ foi significativamente maior na fase pré-operatória (4,05 ± 0,84) em relação às medidas realizadas seis (1,95 ± 0,62 ; p < 0,0001) e 12 meses (1,9 ± 0,64; p<0,007) após a cirurgia. Observou-se aumento significativo do escore do WOMAC do membro operado aos 6 (26,43 ± 5,508) e 12 meses (31,48 ± 3,920) após a cirurgia quando comparado ao período pré-operatório (52,33 ± 3,89) (p<0,01). Nas comparações intragrupos na direção AP, a VM do COP aumentou significativamente, no grupo ATJ, no momento de 6M (2,90 mm/s ± 0,36) e 12M (2,30 mm/s ± 0,31) quando comparada ao pré-operatório (1,98 mm/s ± 0,16) (p < 0,05). Não houve diferença significativa em relação à área do COP nas comparações intra (p=0,3280) e intergrupos (p=0,2236). O equilíbrio dinâmico nas comparações intragrupos aumentou de forma significativa em 6M (p= 0,001) e 12M (p < 0,01) quando comparado ao pré-operatório.Houve aumento significativo da força dos músculos do quadril e joelho nos pacientes operados seis e 12 meses após a cirurgia em comparação ao período pré-operatório (P< 0,05). Ao comparar os controles saudáveis com o grupo ATJ observou uma menor intensidade dolorosa,melhor funcionalidade, maior força muscular, equilíbrio estático e dinâmico do grupo controle em relação aos períodos pré-operatório, 6M e 12M do grupo ATJ (p < 0,001). Conclusão.A intensidade da dor influência de forma negativa na funcionalidade, força muscular, no equilíbrio estático e dinâmico em pacientes portadores de osteoartrose severa e ATJ em relação a controles saudáveis.

京都大学 / 0048 / 新制・課程博士 / 博士(医学) / 甲第22346号 / 医博第4587号 / 新制||医||1042(附属図書館) / 京都大学大学院医学研究科医学専攻 / (主査)教授 安達 泰治, 教授 森本 尚樹, 教授 福原 俊一 / 学位規則第4条第1項該当 / Doctor of Medical Science / Kyoto University / DFAM

No description available.

No description available.

<p><strong>Background: </strong>Total joint arthroplasty (TJA) is considered the treatment of choice to alleviate pain and improve function of patients with osteoarthritis. However,recent evidence suggests that a significant proportion of patients continue to report pain, or worsening of their symptoms well after their joint replacement. We call this chronic pain “<em>phantom joint pain</em>” as it persists despite the fact hat the affected joint has been replaced.</p> <p>Chronic pain of neuropathic origin may be a consequence of surgery or in patients with osteoarthritis (OA); there may be a combination of nociceptive and neuropathic pain (NP) mechanisms. As there are no definitive physiological indicators for NP or gold standards for diagnosis, Guidelines on Neuropathic Pain Assessment advocate the use of screening tools to evaluate the patient’s pain experiences and potentially characterize various pain features.</p> <p>Despite suggestions that phantom joint pain post TJA is a common problem there is limited information about its prevalence among Canadians. To date there are no studies that have characterized neuropathic vs. non- neuropathic chronic pain features in a TJA population.</p> <p><strong>Purpose: </strong>The purpose of this work was to determine the<em> </em>prevalence of chronic pain following total hip (THA) or knee (TKA) arthroplasty, and to identify the proportion of the cohort with chronic pain whose symptoms suggested the pain was of neuropathic origin. In addition we evaluated the ability of the NP Subscale of the McGill pain questionnaire [NP-MPQ (SF-2)] to identify individuals with NP vs. Non NP in the TJA population.</p> <p><strong>Methods:</strong> A retrospective cohort study (2-4 years post joint replacement) of 148 participants with primary unilateral TJAidentified from a large joint arthroplasty database (n=1143). Chronic pain was defined as post surgical pain reported 6-12 months following surgery to be 3 or higher (out of 5) on the Oxford Hip/Knee Scores, and that pain was the same or worse than reported preoperatively. A postal survey was used to administer the NP-MPQ (SF-2)and the Self-Administered Leeds Assessment of Neuropathic Signs and Symptoms (S–LANSS) (1.5-3.5 years post TJA). S-LANSS was the “non reference standard” for classification of neuropathic pain. Human research ethics approvals from Sunnybrook Health Sciences Centre and McMaster University/Hamilton Health Sciences were obtained prior to the study.</p> <p><strong>Results</strong>: The response rate to the postal survey to identify those with chronic pain of neuropathic origin was 53%. Thirteen percent of individuals experienced chronic pain; among individuals with chronic pain, neuropathic subtype was found in 28% (S-LANSS ≥ 12) - 43% [NP-MPQ (SF-2) ≥ 0.91]. Receiver Operating Characteristic (ROC) analysis for NP-MPQ (SF-2) yielded an area under the curve of 0.89 (95% CI: 0.82, 0.97). A cut off score of 0.91 NP-MPQ (SF-2),<strong> </strong>maximized sensitivity (89.5%) and specificity (75.0%). Our results revealed moderate correlation (r=0.56; 95% CI: 0.40, 0.68) between the S-LANSS and NP-MPQ (SF-2)scores in patients with NP post TJA.</p> <p><strong>Conclusion: </strong>Based on our results, a considerable percentage of individuals (13%) experience chronic pain following TKA and THA. Moreover, among individuals with chronic pain symptoms, a significant proportion (28-43%) of those experience pain that appears to have a neuropathic component, even 1.5 to 3.5 years following surgery.Overall prevalence of NP in TJA was 3.3 to 4.5%. The NP-MPQ (SF-2)subscale demonstrated “good” discriminatory ability, thus it might be useful in identifying patients with NP following TJA. Moderate association exists between the scales and this could affect prevalence rates in studies; or diagnosis of NP of individual patients based on the criterion used.</p> / Master of Science (MSc)

Die Implantation von Knieendoprothesen ist ein orthopädisches Standardverfahren und bereits seit vielen Jahren etabliert. Sowohl in Deutschland als auch international nimmt sie einen hohen sozioökonomischen Stellenwert ein. Mögliche Komplikationen stellen daher eine persönliche Belastung für den Patienten, aber auch eine Belastung für das Gesundheitssystem dar. Um eine Nachverfolgung und Dokumentation deutschlandweit vorzunehmen wurde eine externe Qualitätssicherung etabliert. In dieser Arbeit werden Daten der externen Qualitätssicherung mit Studiendaten aus dem Orthopädisch-Unfallchirurgischen Zentrum der Universitätsklinik Dresden verglichen um der Fragestellung nachzugehen ob und wie viele unerwünschte Behandlungsfolgen über den stationären Aufenthalt bzw. die externe Qualitätssicherung hinaus auftreten.:1. Einleitung 6 1.1. Historische Entwicklung 6 1.2. Epidemiologie und heutiger Wissensstand 7 1.3. Entwicklung der Qualitätssicherung 14 1.4. Qualitätssicherung / Qualitätsmanagement in der Medizin 16 1.5. Fragestellung 18 • Hypothese: Es wird angenommen, dass in Studien nicht mehr unerwünschte Behandlungsfolgen im Rahmen des stationären Aufenthaltes erfasst werden als in der externen Qualitätssicherung. 19 • Weiterhin zu bearbeitende Fragestellungen dieser Arbeit sind: 19 2. Material und Methoden 20 2.1. Patientenkollektiv 20 2.2. Ethik 22 2.3. Datenerfassung 23 2.4. Komplikationen 23 2.5. Methoden der statistischen Auswertung 29 3. Ergebnisse 30 3.1. Patientencharakteristika der Studienpopulation 30 3.2. Auswertung der Fragestellungen 38 • 3.2.1. Zur Hypothese: Welche Daten wurden im Rahmen der Studien erfasst und welche Daten wurden über die externe Qualitätssicherung gemeldet? 38 • 3.2.2. Zu den weiterhin bearbeiteten Fragestellungen: 54 4. Diskussion 62 4.1. Zur Hypothese: Es wird angenommen, dass in Studien nicht mehr unerwünschte Behandlungsfolgen im Rahmen des stationären Aufenthaltes erfasst werden als in der externen Qualitätssicherung. 64 4.2. Zu den weiterhin bearbeiteten Fragestellungen: 66 4.3. Ausblick 72 4.4. Limitationen der Studie 74 5. Zusammenfassung 75 6. Summary 77 7. Literatur 79 8. Abbildungsverzeichnis 85 9. Tabellenverzeichnis 87 10. Abkürzungsverzeichnis 88 11. Anhang 92 11.1. Ethikvoten für die zugrundeliegenden Studien 92 11.2. Nachuntersuchungsdokumente der Studien 105 11.3. Danksagung 109 11.4. Anlagen 110 / The total knee arthroplasty is a standard orthopedic procedure which has been established for many years, both in Germany and internationally. Possible complications therefore represent a personal burden for the patient and also for the healthcare-system. In order to carry out tracking and documentation, an external quality assurance was established. In this thesis, data from external quality assurance are compared with study data from the Orthopaedic Trauma Surgery Centre of the University Hospital Dresden in order to investigate the question of whether and how many adverse events occur beyond the inpatient stay or external quality assurance.:1. Einleitung 6 1.1. Historische Entwicklung 6 1.2. Epidemiologie und heutiger Wissensstand 7 1.3. Entwicklung der Qualitätssicherung 14 1.4. Qualitätssicherung / Qualitätsmanagement in der Medizin 16 1.5. Fragestellung 18 • Hypothese: Es wird angenommen, dass in Studien nicht mehr unerwünschte Behandlungsfolgen im Rahmen des stationären Aufenthaltes erfasst werden als in der externen Qualitätssicherung. 19 • Weiterhin zu bearbeitende Fragestellungen dieser Arbeit sind: 19 2. Material und Methoden 20 2.1. Patientenkollektiv 20 2.2. Ethik 22 2.3. Datenerfassung 23 2.4. Komplikationen 23 2.5. Methoden der statistischen Auswertung 29 3. Ergebnisse 30 3.1. Patientencharakteristika der Studienpopulation 30 3.2. Auswertung der Fragestellungen 38 • 3.2.1. Zur Hypothese: Welche Daten wurden im Rahmen der Studien erfasst und welche Daten wurden über die externe Qualitätssicherung gemeldet? 38 • 3.2.2. Zu den weiterhin bearbeiteten Fragestellungen: 54 4. Diskussion 62 4.1. Zur Hypothese: Es wird angenommen, dass in Studien nicht mehr unerwünschte Behandlungsfolgen im Rahmen des stationären Aufenthaltes erfasst werden als in der externen Qualitätssicherung. 64 4.2. Zu den weiterhin bearbeiteten Fragestellungen: 66 4.3. Ausblick 72 4.4. Limitationen der Studie 74 5. Zusammenfassung 75 6. Summary 77 7. Literatur 79 8. Abbildungsverzeichnis 85 9. Tabellenverzeichnis 87 10. Abkürzungsverzeichnis 88 11. Anhang 92 11.1. Ethikvoten für die zugrundeliegenden Studien 92 11.2. Nachuntersuchungsdokumente der Studien 105 11.3. Danksagung 109 11.4. Anlagen 110

INTRODUÇÃO: O diagnóstico microbiológico das infecções em artroplastias é de fundamental importância para a definição da estratégia de uso dos antimicrobianos. As culturas microbiológicas convencionais apresentam elevados índices de falso-negativos, em especial, nas infecções crônicas, em que é frequente a presença do biofilme aderido ao implante. A utilização de amostras deste biofilme, viáveis à cultura, a partir de seu descolamento do implante pela técnica de sonicação, tem mostrado aumento da sensibilidade em publicações recentes. O objetivo deste estudo foi comparar os resultados das culturas microbiológicas de fragmentos de tecido periprotético, realizadas em meio sólido, àquelas obtidas pelo cultivo do líquido oriundo da sonicação do implante removido, semeado, inicialmente, em frascos de hemocultura e, posteriormente, em meio sólido. MÉTODOS: Neste estudo de análise descritiva, prospectivo e comparativo, 30 pacientes com diagnóstico de infecção em artroplastias de joelho ou quadril, com mais de 90 dias de história, tiveram seus implantes cirurgicamente removidos e foram coletadas seis amostras do tecido periprotético, de locais previamente determinados, para a realização de cultura microbiológica em meios sólidos. Simultaneamente, os implantes foram submetidos ao processo de sonicação e o material resultante foi injetado em frascos de hemocultura BD Bactec e submetidos ao processo de cultura automatizada. Todas as amostras foram pesquisadas quanto à presença de bactérias aeróbias, anaeróbias, micobactérias e fungos, e os resultados comparados por meio de análise estatística, em busca da superioridade de um método sobre o outro. Como objetivo secundário, buscou-se analisar quais os pontos de coleta do tecido periprotético teriam maior sensibilidade em suas culturas. RESULTADOS: Não houve diferenças estatisticamente significantes da amostra em relação ao gênero, patologia articular primária, tipo de artroplastia, localização do implante ou lateralidade. Em 17 casos (56,7%), houve uso de antimicrobianos no período de 15 dias que antecederam a retirada do implante. O método de cultura do fluido de sonicação mostrou sensibilidade de 86,7% e foi superior, de modo estatisticamente significante (P < 0,001), em relação à cultura dos fragmentos periprotéticos, cujos resultados tiveram sensibilidades entre 26,7 e 53,3%. O uso de antibioticoterapia recente não interferiu de modo estatisticamente significante na sensibilidade da cultura do líquido oriundo da sonicação. (P = 0,113). Quanto ao objetivo secundário, a coleta de fragmentos da membrana periprotética mostrou maior sensibilidade, estatisticamente significante, na comparação com três dos demais cinco pontos de coleta (P < 0,05). CONCLUSÕES: A cultura microbiológica do líquido obtido por sonicação dos implantes removidos de pacientes com diagnóstico de infecção periprotética e semeado inicialmente em frascos de hemocultura mostrou ter sensibilidade superior, estatisticamente significante, à cultura convencional de fragmentos do tecido periprotético semeados em meios sólidos. A cultura microbiológica da membrana periprotética mostrou ter maior sensibilidade em relação à maioria dos outros sítios que tiveram fragmentos de tecido periprotético pesquisados. / INTRODUCTION: Microbiological diagnosis in periprosthetic infection is of fundamental importance to define the most appropriate antimicrobial strategies. Conventional microbiological cultures have high rates of false negatives, especially in chronic infections, in which there is often the presence of biofilm attached to the implant. The use of samples of viable culturable biofilm taken from the detachment of the implant by sonication technique has been shown to increase the sensitivity in recent studies. The objective of this study was to compare the results of microbiological cultures of periprosthetic tissue fragments, made in a solid medium, to those obtained through the cultivation of the liquid coming from the sonication of the removed implant initially seeded in blood culture bottles and later in solid medium. METHODS: Using descriptive, prospective and comparative analysis, thirty patients with a diagnosis of infected knee or hip arthroplasty, with more than ninety days of history, had their implants surgically removed. Six periprosthetic tissue samples, collected at predetermined places, were used for microbiological culture on solid media. Simultaneously, the implants were subjected to the sonication process, and the resulting material was injected into vials of BD Bactec blood cultures and subjected to an automated culture process. All samples were screened for the presence of aerobic bacteria, anaerobes, mycobacteria and fungi and the results compared by statistical analysis to find the superiority of one method over the other. As a secondary objective, this study sought to analyze which of the periprosthetic tissue collecting points would have greater sensitivity in their cultures. RESULTS: There were no statistically significant differences in the sample as related to gender, primary joint pathology, type of arthroplasty, implant location or laterality. In seventeen cases (56.7%), antimicrobials were used within the 15-day period leading up to the removal of the implant. The sonication culture fluid showed a sensitivity of 86.7% and was higher, statistically significant (P < 0.001) in relation to the culture of periprosthetic fragments, where results displayed sensitivities between 26.7 and 53.3%. The use of recent antibiotic therapy did not affect the sensitivity of the liquid coming from the sonication culture, which was not statistically significant (P = 0.113). As for the secondary objective, the collection of periprosthetic membrane fragments showed higher sensitivity, statistically significant (P < 0.05), as compared to three of the remaining five collecting points. CONCLUSIONS: The microbiological culture liquid obtained by sonication of the implants removed from patients with diagnosis of periprosthetic infection and initially seeded in blood culture bottles was shown to have superior sensitivity, statistically significancy, as compared to conventional culture of the periprosthetic tissue fragments seeded on solid media. The microbiological culture of the periprosthetic membrane seems to be more sensitive compared to most other sites that had periprosthetic tissue fragments surveyed

La pose d’une prothèse totale de genou (PTG) se fait selon la technique d’alignement mécanique (AM) qui corrige les déformations constitutionnelles du membre pour créer un membre rectiligne. La survie à long terme des implants est excellente mais les résultats fonctionnels sont décevants avec notamment de nombreux symptômes résiduels. Une nouvelle technique chirurgicale, l’alignement cinématique (AC), vise à rétablir l’anatomie constitutionnelle pré-arthrosique du genou, et permet une amélioration des résultats fonctionnels des PTG. Cette technique est actuellement réalisée avec des implants destinés à un positionnement mécanique, et qui ont un design trochléen ne reproduisant pas l'anatomie trochléaire native. Ceci pourrait affecter la biomécanique de l’articulation patello-fémorale et donc rendre les résultats fonctionnels des PTG cinématiques non optimal. Ce travail vise à démontrer 1) les limitations de la technique mécanique, 2) la fiabilité de la technique cinématique pour le positionnement de l’implant fémoral, et 3) que les implants actuels ne permettent pas une restauration de l’anatomie trochléenne des patients. / The conventional technique for TKA, namely mechanical alignment (MA), does not preserve the constitutional limb anatomy but systematically creates a straight limb. Excellent long-term implant survivorship has been reported, but functional outcomes are disappointing. To solve this problem, an alternative technique for TKA, namely kinematic alignment (KA), has recently been promoted and aims at restoring the constitutional (pre-arthritic) knee anatomy and laxity. Mid-term outcomes have shown excellent functional outcomes with this new KA technique. However, KA technique is currently done with TKA implants designed to be mechanically inserted. Their trochlea design does not reproduce the native trochlear anatomy, which could lead to increased rate of patellar complications with KA TKA. This work aims at demonstrating technical limitations of MA technique, good reproducibility of KA technique, and inappropriateness of current implant to restore patient trochlea anatomy.

INTRODUÇÃO: O diagnóstico microbiológico das infecções em artroplastias é de fundamental importância para a definição da estratégia de uso dos antimicrobianos. As culturas microbiológicas convencionais apresentam elevados índices de falso-negativos, em especial, nas infecções crônicas, em que é frequente a presença do biofilme aderido ao implante. A utilização de amostras deste biofilme, viáveis à cultura, a partir de seu descolamento do implante pela técnica de sonicação, tem mostrado aumento da sensibilidade em publicações recentes. O objetivo deste estudo foi comparar os resultados das culturas microbiológicas de fragmentos de tecido periprotético, realizadas em meio sólido, àquelas obtidas pelo cultivo do líquido oriundo da sonicação do implante removido, semeado, inicialmente, em frascos de hemocultura e, posteriormente, em meio sólido. MÉTODOS: Neste estudo de análise descritiva, prospectivo e comparativo, 30 pacientes com diagnóstico de infecção em artroplastias de joelho ou quadril, com mais de 90 dias de história, tiveram seus implantes cirurgicamente removidos e foram coletadas seis amostras do tecido periprotético, de locais previamente determinados, para a realização de cultura microbiológica em meios sólidos. Simultaneamente, os implantes foram submetidos ao processo de sonicação e o material resultante foi injetado em frascos de hemocultura BD Bactec e submetidos ao processo de cultura automatizada. Todas as amostras foram pesquisadas quanto à presença de bactérias aeróbias, anaeróbias, micobactérias e fungos, e os resultados comparados por meio de análise estatística, em busca da superioridade de um método sobre o outro. Como objetivo secundário, buscou-se analisar quais os pontos de coleta do tecido periprotético teriam maior sensibilidade em suas culturas. RESULTADOS: Não houve diferenças estatisticamente significantes da amostra em relação ao gênero, patologia articular primária, tipo de artroplastia, localização do implante ou lateralidade. Em 17 casos (56,7%), houve uso de antimicrobianos no período de 15 dias que antecederam a retirada do implante. O método de cultura do fluido de sonicação mostrou sensibilidade de 86,7% e foi superior, de modo estatisticamente significante (P < 0,001), em relação à cultura dos fragmentos periprotéticos, cujos resultados tiveram sensibilidades entre 26,7 e 53,3%. O uso de antibioticoterapia recente não interferiu de modo estatisticamente significante na sensibilidade da cultura do líquido oriundo da sonicação. (P = 0,113). Quanto ao objetivo secundário, a coleta de fragmentos da membrana periprotética mostrou maior sensibilidade, estatisticamente significante, na comparação com três dos demais cinco pontos de coleta (P < 0,05). CONCLUSÕES: A cultura microbiológica do líquido obtido por sonicação dos implantes removidos de pacientes com diagnóstico de infecção periprotética e semeado inicialmente em frascos de hemocultura mostrou ter sensibilidade superior, estatisticamente significante, à cultura convencional de fragmentos do tecido periprotético semeados em meios sólidos. A cultura microbiológica da membrana periprotética mostrou ter maior sensibilidade em relação à maioria dos outros sítios que tiveram fragmentos de tecido periprotético pesquisados. / INTRODUCTION: Microbiological diagnosis in periprosthetic infection is of fundamental importance to define the most appropriate antimicrobial strategies. Conventional microbiological cultures have high rates of false negatives, especially in chronic infections, in which there is often the presence of biofilm attached to the implant. The use of samples of viable culturable biofilm taken from the detachment of the implant by sonication technique has been shown to increase the sensitivity in recent studies. The objective of this study was to compare the results of microbiological cultures of periprosthetic tissue fragments, made in a solid medium, to those obtained through the cultivation of the liquid coming from the sonication of the removed implant initially seeded in blood culture bottles and later in solid medium. METHODS: Using descriptive, prospective and comparative analysis, thirty patients with a diagnosis of infected knee or hip arthroplasty, with more than ninety days of history, had their implants surgically removed. Six periprosthetic tissue samples, collected at predetermined places, were used for microbiological culture on solid media. Simultaneously, the implants were subjected to the sonication process, and the resulting material was injected into vials of BD Bactec blood cultures and subjected to an automated culture process. All samples were screened for the presence of aerobic bacteria, anaerobes, mycobacteria and fungi and the results compared by statistical analysis to find the superiority of one method over the other. As a secondary objective, this study sought to analyze which of the periprosthetic tissue collecting points would have greater sensitivity in their cultures. RESULTS: There were no statistically significant differences in the sample as related to gender, primary joint pathology, type of arthroplasty, implant location or laterality. In seventeen cases (56.7%), antimicrobials were used within the 15-day period leading up to the removal of the implant. The sonication culture fluid showed a sensitivity of 86.7% and was higher, statistically significant (P < 0.001) in relation to the culture of periprosthetic fragments, where results displayed sensitivities between 26.7 and 53.3%. The use of recent antibiotic therapy did not affect the sensitivity of the liquid coming from the sonication culture, which was not statistically significant (P = 0.113). As for the secondary objective, the collection of periprosthetic membrane fragments showed higher sensitivity, statistically significant (P < 0.05), as compared to three of the remaining five collecting points. CONCLUSIONS: The microbiological culture liquid obtained by sonication of the implants removed from patients with diagnosis of periprosthetic infection and initially seeded in blood culture bottles was shown to have superior sensitivity, statistically significancy, as compared to conventional culture of the periprosthetic tissue fragments seeded on solid media. The microbiological culture of the periprosthetic membrane seems to be more sensitive compared to most other sites that had periprosthetic tissue fragments surveyed

Introduction: Osteoarthrosis (OA) of the knee is a degenerative and chronic disease that promotes intense pain and often compromises the elderly population. With the severity of OA and the lack of success of conventional methods, Total Knee Arthroplasty (KTA) has been the most frequently used treatment, however, in some patients pain persists. Therefore, to better understand the pain, it is necessary to use somatosensory and functional tests. Objective: To evaluate the Pressure Pain Threshold (LDP) of patients with OA and submitted to TKA, as well as to analyze the association of pain intensity with functional factors. Methods: A case-control study was carried out on 40 subjects, selected for convenience at the Specialized Center for Orthopedics and Trauma (CEOT), divided into two groups: TKA group consisting of 20 patients operated on, being evaluated in three phases: preoperative , six and 12 months; and the control group comprised of 20 healthy, asymptomatic, paired subjects by sex and age, evaluated in a single moment. The LDP was performed through the digital pressure algometer. The intensity of pain was measured on the numerical scale from 0 to 10, the muscular strength assessed by the digital manual dynamometer. Range of motion obtained by the fleximeter. Static balance measured by the baropodometer and the speed test used to measure gait speed. Results: It presented statistical difference between the control group and TKA in all peripatellar and tibial points (P) (p <0.002). P4, P5, P5, P6, P8 and P9 (p <0.05), and six and 12 months were significant at P4, P5, P6, P8 and P9 (p <0.05) and Preoperative period and 12 months in P9 (p <0.05). In the comparison between the P at each stage of the evaluation, only significant changes were observed between P3 and P6 (p <0.05), P4 and P6 (p <0.005). Correlations of moderate to strong and inversely proportional between pain in movement and flexor strength (r = - 0.46), knee extensors (r = -0.49), hip abductors (r = -0.59) And gait velocity (r = -0.6), in the preoperative phase. Conclusion: In the preoperative phase there was lower LDP, due to central and peripheral sensitization due to OA chronicity. At six months post-operatively, he found a decrease in pain, which could be related to the efficacy of TKA and rehabilitation. Similar to the pre-surgical phase, at 12 months, LDP decreased, which may be linked to the central pain sensitization mechanism, contributing negatively to the decline in muscle strength and gait velocity. / Introdução: A osteoartrose (OA) do joelho é uma doença degenerativa, crônica que promove dor intensa e frequentemente compromete a população idosa. Com a gravidade da OA e a falta de sucesso dos métodos convencionais, a Artroplastia Total do Joelho (ATJ) tem sido o tratamento cirúrgico mais utilizado, para melhora da função biomecânica e da qualidade de vida. No entanto, alguns pacientes, apresentam a persistência de dor. Portanto, para melhor compreensão do quadro álgico torna-se necessário a utilização de testes somatossensoriais e funcionais. Objetivo: Avaliar o Limiar de Dor por Pressão (LDP) dos pacientes com OA e submetidos à ATJ, bem como analisar a associação da intensidade de dor com os fatores funcionais. Métodos: Estudo caso-controle, participaram 40 sujeitos, selecionados por conveniência no Centro de Especialidade em Ortopedia e Trauma (CEOT), divididos em dois grupos: grupo ATJ formado por 20 pacientes operados, sendo avaliados em três fases: pré-operatória, seis e 12 meses; e o grupo controle formado por 20 sujeitos saudáveis, assintomáticos, pareados por sexo e idade, avaliados em um único momento. O LDP foi realizado pelo algômetro de pressão digital e aplicado perpendicularmente a pele em seis pontos peripatelares (P1, P2, P3, P4, P5 e P6) e três pontos tibiais (P7, P8 e P9). A intensidade de dor foi mensurada na escala numérica de zero a 10. A força muscular avaliada pelo dinamômetro manual digital. A amplitude de movimento obtida pelo flexímetro. Equilíbrio estático mensurado pelo baropodômetro e utilizado o speed test para medir a velocidade da marcha. Resultados: O grupo controle apresentou maior LDP, com diferença estatística, comparado ao grupo ATJ em todos os pontos (P) peripatelares e tibiais (p< 0,002). Na fase pré-operatória houve menor LDP em relação a fase de seis meses nos P3, P4, P5, P6, P8 e P9 (p<0,05). Aos 12 meses ocorreu uma redução do LDP nos P4, P5, P6, P8 e P9 (p<0,05) quando relacionado a fase de seis meses. Na comparação entre os P em cada fase da avaliação, observou que somente na fase pré-operatória, o LDP foi menor no P6 em relação aos P3 e P4 (p<0,005). Foram encontradas correlações de moderada a forte, e inversamente proporcional, entre dor em movimento e força dos flexores (r = -0,46), extensores do joelho (r = -0,49), abdutores do quadril (r = -0,59) e velocidade da marcha (r = -0,6), na fase pré-operatória. Conclusão: Na fase pré-operatória houve menor LDP, provavelmente, em virtude da cronicidade da OA e consequentemente da sensibilização central e periférica. Aos seis meses de pós-operatório, encontrou redução do quadro álgico, podendo relacionar à eficácia da ATJ e da reabilitação. Semelhante à fase pré-cirúrgica, aos 12 meses, o LDP diminuiu, possivelmente estando atrelado ao mecanismo de sensibilização central de dor, contribuindo negativamente para o declínio da força muscular e da velocidade média da marcha.