INTRODUÇÃO: a doença de Legg-Calvé-Perthes (DLCP) é a causa da osteoartrose de quadril em menos de 5% dos casos com indicação de artroplastia total do quadril (ATQ). Por isso, poucos estudos descrevem os resultados clínicos e radiológicos da ATQ nessa situação, em que deformidades no fêmur proximal e no acetábulo tornam a cirurgia um desafio técnico. MÉTODO: neste estudo tipo caso-controle, foram revisados os prontuários de pacientes admitidos num hospital público universitário de referência para serem submetidos à ATQ por osteoartrose primária ou secundária à DLCP entre 2008 e 2015, utilizando um determinado modelo de prótese não cimentada de um mesmo fabricante. Os pacientes foram convocados para análise clínica e radiográfica. Indivíduos com ATQ por osteoartrose secundária à DLCP foram comparados a um grupo controle de pacientes com osteoartrose primária quanto a dor e função por meio do questionário de Lequesne. Foram também avaliadas as seguintes variáveis radiográficas: inclinação lateral do componente acetabular em relação à pelve, offset femoral e posicionamento do componente femoral em relação ao canal femoral. As avaliações radiográficas no pós-operatório imediato e na última consulta de seguimento foram comparadas. O tempo cirúrgico, o tamanho dos componentes protéticos utilizados e as complicações decorrentes do ato cirúrgico foram comparados nos dois grupos. RESULTADOS: no período do estudo, foram analisados 22 pacientes no grupo estudo (25 quadris) e 22 pacientes (25 quadris) do grupo controle, que foram comparados. Os dois grupos eram homogêneos quanto a lateralidade, sexo, tempo de cirurgia, tempo de seguimento e tamanho dos componentes utilizados. Os pacientes do grupo controle, com osteoartrose primária, tinham idade superior aos do grupo estudo. Ocorreram quatro fraturas periprotéticas femorais intraoperatórias no grupo com sequela da DLCP e nenhuma no grupo com osteoartrose primária (p = 0,050). A avaliação clínica e funcional mostrou maior comprometimento no grupo de pacientes com sequela da DLCP (p = 0,002). As medidas angulares de inclinação lateral acetabular foram semelhantes entre os dois grupos. Tanto no pós-operatório imediato quanto no final do seguimento, os componentes femorais estavam posicionados significativamente mais em valgo para o grupo com sequela da DLCP quando comparados ao grupo controle (com p = 0,008 no pós-operatório imediato e p = 0,002 no seguimento final). A medida do offset femoral lateral não teve diferenças significativas entre os grupos. Em nenhum dos casos dos grupos estudados houve infecção, luxação ou lesão neurológica decorrentes do ato cirúrgico. Não foi indicada ou realizada nenhuma cirurgia de revisão em ambos os grupos. CONCLUSÕES: há risco aumentado de fratura femoral periprotética intraoperatória e resultados clínico-funcionais piores em pacientes com osteoartrose secundária à sequela da DLCP submetidos a ATQ sem cimento convencional do que em pacientes com osteoartrose primária do quadril. Os componentes femorais da ATQ sem cimento convencional tendem a ser implantados mais em valgo no canal femoral nos casos motivados por osteoartrose secundária à sequela da DLCP comparados aos casos motivados por osteoartrose primária do quadril / INTRODUCTION: Legg-Calvé-Perthes disease (LCPD) is the cause of hip osteoarthrosis in less than 5% of cases with an indication of total hip arthroplasty (THA). For that reason, few studies describe the clinical and radiological results of THA in this situation, in which proximal femur and acetabulum deformities make surgery a technical challenge. METHODS: In this case-control study, the medical records of patients admitted to a public university reference hospital to undergo THA due to primary osteoarthrosis or to LCPD sequelae between 2008 and 2015, using a cementless prosthesis from the same manufacturer, were reviewed. Patients were recruited for clinical and radiographic analysis. Individuals with osteoarthrosis secondary to LCPD were compared to a control group of patients with primary osteoarthrosis regarding pain and function using the Lequesne questionnaire. The following radiographic variables were also evaluated: acetabular component inclination in relation to the pelvis, femoral offset, and femoral component position in relation to the femoral canal. Evaluations in the immediate postoperative period and at the last follow-up visit were compared. The surgical time, the size of the prosthetic components used and the complications resulting from the surgical procedure were studied and compared between groups. RESULTS: During the study period, 22 patients in the study group (25 hips) were compared to 22 patients (25 hips) in the control group. The two groups were homogeneous regarding the laterality, sex, surgery time, follow-up time and size of the prosthetic components used. Patients in the control group, with primary osteoarthrosis, were older than those in the study group. There were four intraoperative femoral periprosthetic fractures in the group with LCPD sequelae and none in the primary osteoarthrosis group (p = 0.050). The clinical and functional evaluation showed greater impairment in the group of patients with LCPD sequelae (p = 0.002). Angular measures of acetabular inclination were similar between the two groups. Both in the immediate postoperative period and at the end of the follow-up, the femoral components were positioned significantly more in valgus for the LCPD sequelae group when compared to the control group (p = 0.008 in the immediate postoperative period and 0.002 in the final follow-up). The measurement of the lateral femoral offset was similar between the groups. In none of the cases of the studied groups, there was infection, dislocation or neurological injury resulting from the surgical act. No revision surgery was indicated or performed in both groups. CONCLUSIONS: There is an increased risk of intraoperative periprosthetic femoral fracture and worse clinical-functional results in patients with osteoarthrosis secondary to LCPD sequelae undergoing conventional cementless THA than in patients with primary hip osteoarthrosis. The femoral components of the cementless THA tend to be implanted more in valgus in the femoral canal in the cases of osteoarthrosis secondary to the sequelae of the LCPD compared to cases of primary hip osteoarthrosis

Submitted by Renata Lopes (renatasil82@gmail.com) on 2016-07-14T11:51:08Z No. of bitstreams: 1 elmanodearaujoloures.pdf: 9149491 bytes, checksum: 08630dfeb5037d2bfef775000aee4585 (MD5) / Approved for entry into archive by Diamantino Mayra (mayra.diamantino@ufjf.edu.br) on 2016-07-19T14:30:09Z (GMT) No. of bitstreams: 1 elmanodearaujoloures.pdf: 9149491 bytes, checksum: 08630dfeb5037d2bfef775000aee4585 (MD5) / Made available in DSpace on 2016-07-19T14:30:09Z (GMT). No. of bitstreams: 1 elmanodearaujoloures.pdf: 9149491 bytes, checksum: 08630dfeb5037d2bfef775000aee4585 (MD5) Previous issue date: 2011-10-20 / A artroplastia total do quadril possui uma das melhores relações custo-benefício dentre todas as intervenções realizadas no aparelho locomotor. Grande parte das publicações aborda somente os aspectos técnicos e o desempenho dos implantes e negligencia a repercussão sobre a qualidade de vida e as co-morbidades, tornando a medida correta dos benefícios do tratamento imprecisa. Atualmente, os parâmetros de medição da qualidade de vida associados às escalas funcionais tornaram-se imperativos para uma análise acurada de resultados e fatores influentes. O objetivo principal do estudo foi avaliar a qualidade de vida relacionada à saúde em pacientes afetados por osteoartrose do quadril e tratados por artroplastia total do quadril. Estudou-se prospectivamente uma coorte de 38 pacientes operados em hospital universitário de referência regional acompanhados durante, no mínimo, seis meses até atingirem reabilitação satisfatória. Secundáriamente, avaliou-se o desempenho de curto prazo do componente acetabular MD4® implantado em 35 indivíduos. Os dados foram obtidos por meio da aplicação de quatro instrumentos: 1) questionário para a caracterização sóciodemográfica e clínica da amostra; 2) escala de avaliação funcional do quadril – Harris Hip Score (HHS); 3) instrumento genérico de avaliação da qualidade de vida relacionada à saúde The Medical Outcomes Study 36-item Short-Form Health Survey (SF-36) e 4) questionário de avaliação da satisfação individual com o procedimento. Os resultados dos testes pré e pós-operatórios foram submetidos à análise estatística descritiva e comparados com a literatura. Os resultados pré e pósoperatórios do SF-36 foram capacidade funcional: 13,4-53,7; limitação por aspectos físicos: 9,21-48,0; dor: 23,1-62,6; estado geral de saúde: 54,2-71,3; vitalidade: 40,3- 69,9; aspectos sociais: 40,8-74,3; limitação por aspectos emocionais: 23,7-64,9; saúde mental: 52,6-80,4. O Harris Hip Score variou de 36,1 a 92,1, em média. Todos os resultados foram estatisticamente significantes (p < 0,001). A combinação de duas escalas mostrou-se valiosa na identificação de vieses e conferiu maior confiabilidade na compreensão das diversas variáveis. O estudo demonstra uma significativa melhora na qualidade de vida relacionada à saúde em pacientes afetados por osteoartrose de diferentes etiologias submetidos à artroplastia total do quadril. A avaliação da qualidade de vida não substitui a avaliação clínica provida por instrumentos específicos e pela experiência do cirurgião, mas pode adicionar dados importantes ao valorizar o conjunto de expectativas do paciente perante um tratamento médico e ser considerada um instrumento eficiente na análise de resultados da artroplastia total do quadril. Adicionalmente, o componente acetabular avaliado mostrou estabilidade e indícios de osteointegração em todos os casos, o que pode ser considerado indicativo de bom desempenho a médio prazo do implante. / Total hip replacement is one of the most cost-effective procedures upon the locomotor system. Most of the publications covers only the technical aspects and the performance of implants and neglects the impact on the quality of life and comorbidities, making the correct measurement of a treatment benefits imprecise. Nowadays, the measurement of health-related quality of life associated with functional scales has become imperative for more accurate analysis of results and influencing factors. To assess the health – related quality of life in patients with osteoarthritis and undergoing total hip arthroplasty was the main goal in this study. A cohort of 38 patients from a regional referral teaching hospital was prospectively followed up for at least six months until they have achieved satisfactory rehabilitation. Secondarily, the short-term performance of the MD-4® acetabular component implanted in 35 individuals was evaluated. Data were obtained through the application of four instruments: 1) questionnaire for socio-demographic and clinical characteristics of the sample; 2) functional scale of the hip - Harris Hip Score (HHS); 3) generic instrument for assessing health-related quality of life The Medical Outcomes Study 36-Item Short-Form Health Survey (SF-36) and 4) questionnaire assessing individual satisfaction with the procedure. The results pre and postoperatively were analyzed using descriptive statistics and compared with the literature. The SF-36 results pre and post-operative were functional capacity: 13.4 to 53.7, limited by physical aspects: 9.21 to 48.0; pain: 23.1 to 62.6, general health: 54.2 to 71.3; vitality: 40.3 to 69.9; social aspects: from 40.8 to 74.3, limited by emotional aspects: from 23.7 to 64.9; mental health: 52.6 - 80.4. The Harris Hip Score ranged from 36.1 to 92.1 on average. All results were statistically significant (p < 0.001). The combination of two scales showed up to be valuable in bias identification and gave more reliability on the variables understanding. The study reports a significant improvement in health-related quality of life in patients affected by osteoarthritis of many etiologies that underwent total hip replacement. Healthrelated quality of life assessment does not replace clinical evaluation provided by specific instruments and the physician’s experience but can add important data and also can be considered an efficient tool in analyzing outcomes of total hip replacement due to the weight it gives to the patient’s expectations regarding a medical treatment.Additionally , the study showed up evidence of osteointegration and stability of the acetabular cup in all cases, which would be a predictor factor for mid-term survivorship of this acetabular component.

Abstract Treatment-related late effects have increasingly become important, since the majority of children, adolescents and young adults with cancer become long-term survivors. Osteonecrosis (ON) is recognized as a potential debilitating sequel in patients with cancer. The aims of this work were to define the incidence of and clinical risk factors for ON identified with end-of-therapy magnetic resonance imaging (MRI) screening among patients with childhood cancer and to investigate the incidence of and risk factors for ON requiring total joint arthroplasty (TJA) in patients treated for cancer in childhood, adolescence or young adulthood in a register-based study. MRI of the lower extremities revealed ON in 23 (24%) of the 97 patients with acute lymphoblastic leukemia (ALL) at the end of treatment. High body mass index, female gender, older age at diagnosis, and higher cumulative dexamethasone dose were independent risk factors for ON. Six of the 32 patients (19%) treated for lymphoma or solid tumor had ON in MRI scans at the end of the treatment. All of these patients with ON had non-Hodgkin lymphoma or Hodgkin lymphoma. In a register-based study, patients diagnosed with cancer before 31 years of age were identified from the Finnish and Danish Cancer registries. These data were combined with data from the National Hospital Discharge and the Finnish Arthroplasty registers. The cohort consisted of 6,358 patients diagnosed with hematologic malignancy and 18,542 patients diagnosed with solid tumor from 1975 to 2000 in Finland and from 1975 to 2006 in Denmark. The estimated cumulative incidence of TJA was 4.5% at 20 years for patients treated for chronic myeloid leukemia, followed by 2.1% for patients treated for acute myeloid leukemia and 0.4% for patients treated for ALL. Allogeneic stem cell transplantation increased the risk of TJA. In conclusion, ON as determined with MRI is a common complication in children after treatment for ALL. High BMI was identified as a new significant risk factor for ON in patients with pediatric ALL. The incidence of ON requiring TJA was highest among children, adolescents and young adults treated for myeloid leukemias. / Tiivistelmä Syöpähoitojen aiheuttamien myöhäisvaikutusten merkitys on viime vuosina kasvanut, koska suuri osa lapsena tai nuorena aikuisena syöpään sairastuneista paranee. Syöpähoitojen seurauksena voi syntyä luukuolioita, jotka heikentävät merkittävästi elämänlaatua ja liikuntakykyä. Tämän väitöskirjatyön tarkoituksena oli selvittää magneettitutkimuksella luukuolioiden ilmaantuvuus ja riskitekijät syöpähoitojen lopetusvaiheessa lapsuusiän syövän sairastaneilla sekä selvittää rekisteritutkimuksella tekonivelleikkausta vaativan luukuolion ilmaantuvuus ja riskitekijät lapsena tai nuorena aikuisena hoidetuilla syöpäpotilailla. Akuutin lymfaattisen leukemian (ALL) sairastaneista 23/97:lla (24 %) todettiin alaraajojen magneettitutkimuksessa luukuolioita. Korkea painoindeksi, naissukupuoli, vanhempi ikä diagnoosihetkellä ja suurempi kumulatiivinen deksametasoniannos lisäsivät luukuolion todennäköisyyttä. Lymfooman tai kiinteän kasvaimen sairastaneista 6/32:lla (19 %) todettiin luukuolioita. Tutkimme tekonivelleikkausta vaativan luukuolion ilmaantuvuutta Suomen ja Tanskan väestöpohjaisten rekistereiden avulla. Tutkimuskohorttimme muodostui 6 358 leukemiaan ja lymfooman sekä 18 542 kiinteään kasvaimeen Suomessa ja Tanskassa alle 31-vuotiaana sairastuneesta potilaasta. Tekonivelleikkausta vaativan luukuolion kumulatiivinen ilmaantuvuus 20 vuoden seurannan aikana oli kroonisen myelooisen leukemian sairastaneilla 4,5 %, akuutin myelooisen leukemian sairastaneilla 2,1 % ja ALL:n sairastaneilla 0,4 %. Allogeeninen kantasolujen siirto lisäsi luukuolioiden todennäköisyyttä. Tässä väitöskirjatyössä osoitettiin, että ALL:n sairastaneilla lapsilla magneettitutkimuksella todetut luukuoliot ovat yleinen haittavaikutus. Korkea painoindeksi on luukuolioiden uusi merkittävä riskitekijä. Tutkimus antoi myös uutta tietoa tekonivelleikkausta vaativan luukuolion ilmaantuvuudesta ja riskitekijöistä lapsuusiällä tai nuorella aikuisiällä syövän sairastaneilla.

Bakgrund: Personer som drabbas av knäledsartros där inte medicinsk behandling fungerat blir aktuella för total knäartroplastik (TKA). Under en persons livstid är risken att få knäledsartros 40-45%. TKA förknippas med måttlig till svår smärta efter det kirurgiska ingreppet. Smärtlindringsmetoder har utvecklats och blivit effektivare för att patienten ska få bättre smärtlindring postoperativt. Tidigare studier har visat att god postoperativ smärtlindring förbättrar återhämtningen och minskar postoperativa komplikationer för patienten. Syftet: Syftet med vår kvantitativa enkätstudie var att undersöka patientens skattning av smärta postoperativt efter TKA. Metod: I studien deltog 29 kvinnor och män mellan 53-84 år. Deltagarna fick skatta sin smärta vid två tillfällen, 0-1 timme och mellan 2-4 timmar postoperativt med visuell analog skala (VAS). Data analyserades i SPSS version 24.0. Resultatet: Resultatet visade att efter 0-1 timme postoperativt hade 89.7% VAS ≤ 3 och vid 2-4 timmar postoperativt hade 75.8% VAS ≤ 3. Majoriteten av deltagarna 72.4% skattade sin smärta VAS ≤ 3 vid båda tillfällena. Det fanns en skillnad mellan de deltagare som erhållit spinalanestesi och generell anestesi. Vid första skattningen postoperativt var det ingen som erhållit spinalanestesi som skattade smärta, de som skattade VAS &gt; 3 hade erhållit generell anestesi. Konklusion: Slutsatsen är att patienter som genomgår TKA är väl smärtlindrade men att en större studie med fler antal deltagare skulle behövas göras för att utveckla bättre omvårdnadsrutiner för att möta personers behov av smärtlindringen när spinalanestesins effekter avtagit.

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

Die Zielsetzung dieser Arbeit besteht darin zu prüfen, ob die Luxationsrate bei Hochrisikopatienten durch den Einsatz von 40-mm- und 44-mm-Köpfen im Vergleich zu Patienten mit maximal 36-mm-Köpfen reduziert werden kann. Hierzu wurden die im Zeitraum von September 2009 bis Mai 2014 hüftendoprothetisch versorgten Patienten mit einem erhöhten Luxationsrisiko erfasst und die Verläufe auf Luxationen überprüft. Zur Risikobewertung diente eine eigens entwickelte Klassifikation. Des Weiteren erfolgte die Analyse der postoperativen Verläufe, der Röntgenbilder und eines Telefoninterviews in den Fällen, in denen Köpfe ≥ 40 mm zum Einsatz kamen. Im Untersuchungszeitraum wurden 288 Hüftendoprotheseneingriffe mit erhöhtem Luxationsrisiko durchgeführt. Bei 278 HTEP-Implantationen erfolgte der Einsatz von Gelenkköpfen ≤ 36 mm. In dieser Gruppe betrug die Luxationsrate 15,1% (n=42). Bei 10 Patienten wurden 40-mm- oder 44-mm-Gelenkköpfe eingesetzt. In diesen Fällen wurde das Luxationsrisiko entsprechend der vorgeschlagenen Klassifikation mit 3A (hoch) bis 4B (sehr hoch) bewertet. Bei einem mittleren Follow up von 22,8 Monaten wurde bei diesen Patienten keine Luxation festgestellt. Die mit 40-mm- sowie 44-mm-Köpfen erzielten Ergebnisse und die aktuelle Literatur sprechen für eine wesentlich höhere Gelenkstabilität und eine deutlich verminderte Luxationsneigung größerer Köpfe. Deren Einsatz ist daher gegenwärtig bei Risiko-patienten gerechtfertigt, sofern dieser in Abhängigkeit vom Pfannenaußendurch-messer konstruktiv möglich ist. In der weiteren Entwicklung der Hüftendoprothetik sollte die Verwendung größerer Köpfe angestrebt werden.:Inhaltsverzeichnis Bibliographische Beschreibung Abkürzungsverzeichnis 1. Einleitung 1.1 Bedeutung der Hüftendoprothetik 1.2 Hüftendoprothesenluxation 1.2.1 Definition und Häufigkeit 1.2.2 Ursachen 1.2.3 Einteilung und Klassifikation 1.2.4 Risikofaktoren 1.2.5 Beurteilung des Luxationsrisikos bei hüftendoprothetischen Eingriffen 1.2.6 Ursachen des luxations-mindernden Effektes großer Köpfe 1.2.7 Vorgehen nach Luxation 1.2.7.1 Diagnostik 1.2.7.2 Therapie 1.3 Zielsetzung der Arbeit 2. Publikation 3. Zusammenfassung 4. Literaturverzeichnis 5. Tabellenverzeichnis 6. Abbildungsverzeichnis 7. Erklärung über die eigenständige Abfassung der Arbeit 8. Lebenslauf und wissenschaftlicher Werdegang 9. Danksagung 10. Anlagen Anlage 1 - Dokumentationsbogen Patienten mit Großköpfen Anlage 2 - Telefoninterviewbogen zu 40/44mm Köpfen

In der Hüftendoprothetik finden gewebeschonende Zugangswege, sogenannte minimal-invasive Zugänge, zunehmend häufiger Anwendung. Die postulierten Vorteile beziehen sich hierbei vor allem auf eine bessere Frühmobilisation durch geringeres Schmerzerleben bei besserer Gelenksfunktionalität. Diese initial prospektiv randomisiert angelegte Studie ging der Frage nach, ob zwischen zwei minimal-invasiven und einem konventionellen Zugangsweg zur Hüftgelenkstotalendoprothesen-Implantation Unterschiede hinsichtlich Algofunktion, Lebensqualität, Patientenzufriedenheit und Funktionsparametern über einen mittelfristigen Beobachtungszeitraum bestehen. Als minimal-invasive Varianten kamen ein modifizierter anteriorer und ein modifizierter anterolateraler Zugang zum Einsatz, den konventionellen Zugangsweg stellte der transgluteale nach Bauer dar. Hierzu wurden bei 147 Patienten 154 Operationen mit fortlaufender 1:1:1 Randomisierung durchgeführt. Die mittelfristige Datenerhebung schloss 103 Patienten mit 109 Hüftgelenkstotalendoprothesen in der Studiensprechstunde und weitere 16 per Briefbefragung ein. Die Algofunktion wurde primär anhand des HHS ermittelt und um den WOMAC-Arthroseindex sowie den UCLA-Score ergänzt. Der EuroQol-Fragebogen wurde zur Erhebung der Lebensqualität eingesetzt und um eine numerisch analoge Zufriedenheitsskala erweitert. Die Funktionsprüfung erfolgte durch eine apparative Messung der 25-MeterGeh- und 5-Stufen-Steigezeit. Unabhängig vom gewählten Zugangsweg zeigten die Ergebnisse dieser Studie in sämtlichen untersuchten Dimensionen eine signifikante Besserung des Ausgangszustandes nach einem Beobachtungszeitraum von mindestens sieben Jahren. Es ließen sich dabei keine signifikanten Unterschiede hinsichtlich Algofunktion, Lebensqualität und Funktionsparametern zwischen den einzelnen Zugangswegen feststellen. Die Medianwerte der Patientenzufriedenheit waren in allen Gruppen vergleichbar, lediglich die Anzahl an statistischen Ausreißern und solchen, die die Frage nach einer hypothetischen Wiederholung der Operation verneinten, zeigten einen signifikanten Unterschied zu Ungunsten des konventionellen Zugangs. Vorteile der minimal-invasiven Techniken über die in der Literatur genannte frührehabilitative Phase hinaus konnten in unserer Beobachtung nicht gezeigt werden. Eine klare Empfehlung für oder gegen einen bestimmten Zugangsweg kann von unserer Seite aus nicht gegeben werden, besonders, da der anteriore Zugang durch eine deutlich erhöhte Revisionsrate nur eingeschränkt beurteilbar ist. / In hip arthroplasty, tissue sparing approaches, so-called minimally invasive approaches, are increasingly used. The estimated benefits are concentrated on more successful early mobilisation due to less sensation of pain and better functionality of the joint. The aim of this initially prospective and randomized designed trial was to identify differences between two minimally invasive and one conventional approach for total hip arthroplasty regarding algofunctional outcome, quality of life, satisfaction as well as functional parameters in a midterm follow-up. We compared the two minimally invasive modified anterior and anterolateral approaches with the conventional transgluteal Bauer approach. A total of 154 hip joints of 147 patients were included and randomized to the three approaches in a 1:1:1 fashion. The midterm follow-up included 103 patients examined in the outpatient clinic with an overall 109 total hip arthroplasties as well as evaluation of 16 patients by a letter survey. The algofunctional outcome was assessed by the Harris Hip Score, the WOMAC Osteoarthritis Index and the UCLA Score. To measure the quality of life we chose the EuroQol questionnaire and added a numeric analogue scale to quantify the patients’ satisfaction. Further functional data was produced by instrument-based evaluation of the 25 meters gait velocity and five stairs climbing speed tests. After a mean follow-up of 7 years this study showed significant benefits in every controlled dimension compared to the pre-operative situation, regardless of the approach chosen. No significant differences were observed regarding algofunctional outcome, quality of life, and functional parameters. The mean levels of satisfaction were comparable in all groups; however, the number of statistical outliers and of patients who would retrospectively decline this operation was significantly increased for the conventional technique. In the present study no advantages of the minimally invasive approaches were found beyond the early rehabilitation period. This is in line with the current scientific literature. In conclusion we are not able to provide a definitive recommendation in favour of one of the used approaches, especially because the validation of the anterior approach is limited by its noticeable increased revision rate in this study.

Total hip replacement is one of the most common surgeries in orthopedics. Complete hip replacement can be addressed with several different types of surgical approaches. In this work we deal mainly with the anterior and anterolateral approach. The theoretical part of this work summarizes the basic knowledge about the anatomy, kinesiology of the hip joint and the prearthrotic causes leading to complete hip replacement. Furthermore, the types of surgical approaches, types of total endoprostheses are mentioned and the knowledge about soft tissue healing and early postoperative rehabilitation is summarized. The aim of this work is to determine whether rehabilitation will be faster in the first days after surgery in patients operated by the anterior approach, depending on the gentle approach and respect for anatomical structures, compared to the anterolateral approach. We present a group of 24 patients, 12 of whom underwent anterior approach and 12 anterolateral approach. In the practical part we evaluate and compare early postoperative rehabilitation in both approaches. The parameters we evaluate are the muscular strength of abduction, flexion and extension in the hip joint. Furthermore, the passive and active range of motion in the hip joint during abduction, flexion and extension. We also evaluate...

The increasing demand for healthcare services, coupled with the challenges of managing budgets and navigating complex regulations, has underscored the need for sustainable and efficient healthcare delivery. In response to this pressing issue, this thesis aims to optimize hospital efficiency using Artificial Intelligence (AI) techniques. The focus extends beyond improving surgical intraoperative time to encompass preoperative and postoperative periods as well. The research presents a novel Prescriptive Analytics System (PAS) designed to enhance the Surgical Success Rate (SSR) in surgeries and specifically in high volume arthroplasty. The SSR is a critical metric that reflects the successful completion of 4-surgeries during an 8-hour timeframe. By leveraging AI, the developed PAS has the potential to significantly improve the SSR from its current rate of 39% at The Ottawa Hospital to a remarkable 100%. The research is structured around five peer-reviewed journal papers, each addressing a specific aspect of the optimization of surgical efficiency. The first paper employs descriptive analytics to examine the factors influencing delays and overtime pay during surgeries. By identifying and analyzing these factors, insights are gained into the underlying causes of surgery inefficiencies. The second paper proposes three frameworks aimed at improving Operating Room (OR) throughput. These frameworks provide structured guidelines and strategies to enhance the overall efficiency of surgeries, encompassing preoperative, intraoperative, and postoperative stages. By streamlining the workflow and minimizing bottlenecks, the proposed frameworks have the potential to significantly optimize surgical operations. The third paper outlines a set of actions required to transform a selected predictive system into a prescriptive one. By integrating AI algorithms with decision support mechanisms, the system can offer actionable recommendations to surgeons during surgeries. This transformative step holds tremendous potential in enhancing surgical outcomes while reducing time. The fourth paper introduces a benchmarking and monitoring system for the selected framework that predicts SSR. Leveraging historical data, this system utilizes supervised machine learning algorithms to forecast the likelihood of successful outcomes based on various surgical team and procedural parameters. By providing real-time monitoring and predictive insights, surgeons can proactively address potential risks and improve decision-making during surgeries. Lastly, an application paper demonstrates the practical implementation of the prescriptive analytics system. The case study highlights how the system optimizes the allocation of resources and enables the scheduling of additional surgeries on days with a high predicted SSR. By leveraging the system's capabilities, hospitals can maximize their surgical capacity and improve overall patient care.