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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

An assessment of patients followed for Hepatitis B at the Department of Infectious Diseases at Örebro University Hospital : - Factors associated with significant liver fibrosis evaluated by transient elastography

Axelsson, Therese January 2019 (has links)
Introduction: Chronic hepatitis B (CHB) is a viral infection that can lead to development of fibrosis and hepatocellular carcinoma (HCC). Several factors affecting disease progression have been reported, such as sex and region of origin. Liver stiffness and fibrosis can be evaluated using transient elastography. The degree of fibrosis is an important parameter when deciding if treatment and HCC surveillance is indicated. Aim1) To compare patients with CHB according to sex and region of origin regarding the parameters liver stiffness, presence of significant fibrosis, hepatitis B e antigen (HBeAg) positivity, frequency of elevated alanine aminotransferase (ALT) levels and HCC surveillance.2) To identify factors associated with significant liver fibrosis. Methods: 410 patients with a registered doctor’s visit 2015–2018 at the Department of Infectious Diseases at Örebro University Hospital were included. A systematic review of medical records was performed and groups (women-men, regions of origin) were compared. Multivariate logistic regression was used to identify factors associated with significant fibrosis. Results: Men had significantly higher liver stiffness values, higher presence of significant fibrosis, and were more frequently under HCC surveillance compared to women. No other significant differences were found regarding the studied parameters, neither related to sex, nor to region of origin. Factors associated with significant fibrosis were: male sex, elevated ALT levels and hepatitis D virus (HDV) co-infection. Conclusions: Men had a higher frequency of significant fibrosis compared to women. Factors associated with significant fibrosis were male sex, elevated ALT values and HDV co-infection.
2

The efficiency of acoustic radiation force impulse imaging for the staging of graft fibrosis after liver transplantation / acoustic radiation force impulseを用いた肝硬度測定による移植後肝グラフトの線維化予測

Yoshino, Kenji 25 March 2019 (has links)
京都大学 / 0048 / 新制・課程博士 / 博士(医学) / 甲第21643号 / 医博第4449号 / 新制||医||1034(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 川口 義弥, 教授 坂井 義治, 教授 羽賀 博典 / 学位規則第4条第1項該当 / Doctor of Medical Science / Kyoto University / DFAM
3

Estimating steatosis and fibrosis

Karlas, Thomas, Berger, Joachim, Garnov, Nikita, Lindner, Franziska, Busse, Harald, Linder, Nicolas, Schaudinn, Alexander, Relke, Bettina, Chakaroun, Rima, Tröltzsch, Michael, Wiegand, Johannes, Keim, Volker 28 April 2015 (has links) (PDF)
To compare ultrasound-based acoustic structure quantification (ASQ) with established non-invasive techniques for grading and staging fatty liver disease.
4

Pediatric Percentiles for Transient Elastography Measurements

Brunnert, Lina 09 October 2023 (has links)
No description available.
5

Estimating steatosis and fibrosis: comparison of acoustic structure quantification with established techniques

Karlas, Thomas, Berger, Joachim, Garnov, Nikita, Lindner, Franziska, Busse, Harald, Linder, Nicolas, Schaudinn, Alexander, Relke, Bettina, Chakaroun, Rima, Tröltzsch, Michael, Wiegand, Johannes, Keim, Volker January 2015 (has links)
To compare ultrasound-based acoustic structure quantification (ASQ) with established non-invasive techniques for grading and staging fatty liver disease.
6

Impact de l'utilisation du Fibroscan dans la prise en charge des tumeurs du foie / Impact of Fibroscan in the management of liver tumors

Rajakannu, Muthukumarassamy 15 November 2017 (has links)
Contexte: Les limites du traitement chirurgical des tumeurs du foie sont définies par la réserve hépatique fonctionnelle qui est déterminée par le volume et la qualité du foie non tumoral restant. L’hépatopathie sous-jacente détermine non seulement la place de la chirurgie mais aussi le risque de récidive pour les tumeurs hépatiques primitives. Dans les cas des métastases hépatiques, la chimiothérapie précède très souvent la chirurgie et l’hépatotoxicité de cette chimiothérapie est un risque important des complications post opératoires. Dans le contexte particulier de la transplantation hépatique (TH) pour le carcinome hépatocellulaire (CHC), l’hypertension portale est un risque de progression tumorale pendant la période d’attente et la sortie de la liste. Le foie non tumoral est donc est un facteur important dans la prise en charge des patients avec des tumeurs du foie. FibroScan® qui mesure l'élasticité du foie pourrait être utilisé pour évaluer le foie et prédire les suites post opératoires et la risque de progression de CHC dans la liste de TH. Méthodes: Les patients consécutifs qui ont été programmés pour subir une hépatectomie ou une transplantation ont été inclus dans l'étude après un consentement éclairé. L'élastométrie (LS) et le paramètre d'atténuation contrôlée (CAP) du foie non tumorale ont été estimés en pré opératoire par l’élastographie transitoire avec le dispositif FibroScan® 502 Touch en utilisant des sondes M ou XL. Résultats: Les nomogrammes basés sur LS qui ont été développés et validés dans cette étude ont pu hépatectomie pour les maladies hépatobiliaires. Chez les patients atteints de CHC, LS a joué un rôle plus important car il prédit non seulement les résultats de 90 jours, mais aussi la décompensation hépatique persistante au-delà de la période post-opératoire. En plus, LS ≥30 kPa et CAP <240 dB/m ont été associés à un mauvais pronostic oncologique après l’hépatectomie et peuvent ainsi être un marqueur de substitution pour la nature agressive du CHC. La performance de LS pour diagnostiquer la fibrose hépatique avancée (AUROC: 0.95) et la cirrhose (AUROC: 0.97) a été validée dans cette recherche et CAP a eu une performance satisfaisante pour détecter la stéatose hépatique significatif (AUROC: 0.70). Un modèle à base de LS appelé score HVPG10 a été développé et validé pour diagnostiquer une hypertension portale significative chez les patients atteints d'une maladie chronique du foie. Avec un seuil de 15, le score HVPG10 était précis pour exclure une hypertension portale importante dans >95% des patients et éviter des investigations supplémentaires et inutiles. Conclusion: L'exploration des patients prévus pour l'hépatectomie permet d'prévoir des complications sévères et la mortalité après l’hépatectomie. LS ≥30 kPa élevé est un facteur de risque important la récidive après la résection et de progression de CHC en attente de TH. Par conséquent, TH devrait être le traitement en première intention avec les patients avec LS ≥30 kPa. / Background: The major determinant of the results of surgical resection for liver tumors is the volume and quality of the future liver remnant. The hepatopathy of the non-tumoral liver not only limits the type of surgery but also the risk of recurrence in primary liver tumors. With respect to liver metastasis, pre-operative chemotherapy is the usual treatment strategy and the hepatotoxicity of prolonged chemotherapy is an important risk factor for post-operative morbi-mortality. In patients with hepatocellular carcinoma (HCC) waiting for liver transplantation (LT), clinically significant portal hypertension (CSPH) is a risk for tumor progression and dropout of the waiting list for LT. Overall, degree of liver fibrosis and portal hypertension in the non-tumoral liver are important factors in the management of patients with liver tumors as they determine the prognosis of patients after hepatectomy. FibroScan®, which estimate the degree of liver fibrosis and steatosis, could utilized to evaluate the non-tumoral liver and predict the post-operative outcomes and the risk of dropout from the list of LT in HCC patients waiting for LT. Methods: Consecutive patients programmed to undergo hepatectomy or LT were included in the present study prospectively after an informed consent. Liver stiffness (LS) and controlled attenuation parameter (CAP) were measured pre-operatively by transient elastography using FibroScan® 502 Touch Standard device with M or XL probes. Results: LS-based nomograms that were developed and valided in this study were accurate to predict 90-day severe morbidity and 90-day mortality after hepatectomy for various hepatobiliary diseases. In patients with HCC undergoing hepatectomy, elevated LS ≥22 kPa was a risk factor for persistent hepatic decompensation beyond the 90-day post-operative period. Moreover, LS ≥30 kPa and CAP <240 dB/m were associated with poor oncological outcomes after resection and thus could be a surrogate biomarker of more aggressive HCC. The discriminatory ability of LS to diagnose advanced liver fibrosis (AUROC: 0.95) and cirrhosis (AUROC: 0.97) was validated in the present study. Further, CAP had a satisfactory performance to screen significant hepatic steatosis (S≥2) with AUROC of 0.70. A new LS-based model called HVPG10 score was developed and validated to diagnose CSPH. With a cut-off of 15, it was capable of accurately ruling out CSPH in >95% of the patients with chronic liver disease and would avoid further unnecessary investigations. Conclusion: Pre-operative evaluation of patients with transient elastography would enable surgeons to predict major complications and mortality after hepatectomy with LS-based nomograms. In patients with HCC, LS ≥30 kPa was an important risk factor of incomplete surgical resection, early recurrence after hepatectomy and for tumor progression and dropout while waiting for LT. Therefore, LT must be the primary treatment in HCC patients with LS ≥30 kPa.
7

Messung der Lebersteifigkeit mittels der 2D-Scherwellen-Elastographie mit dem Sonographiegerät LOGIQ E9 (Firma GE Healthcare) bei gesunden Probanden, Leber-gesunden Patienten sowie Patienten mit Leberzirrhose zur Generierung von Normwerten / Measurement of liver stiffness using 2D shear wave elastography with the sonography device LOGIQ E9 (GE Healthcare) in healthy subjects, liver-healthy patients and patients with cirrhosis to generate normal values

Hofer, Johannes Albertus 16 June 2020 (has links)
No description available.

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