Publications by authors named "Hannah-Theresa Luedemann"

Objective: Two-stage exchange with implantation of a temporary spacer is the gold standard treatment for chronic periprosthetic joint infection of the hip. This article describes a simple and safe technique for handmade spacers at the hip.

Indication: Periprosthetic joint infection of the hip.

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The mechanisms by which antibodies confer protection vary across vaccines, ranging from simple neutralization to functions requiring innate immune recruitment via Fc-dependent mechanisms. The role of adjuvants in shaping the maturation of antibody-effector functions remains under investigated. Using systems serology, we compared adjuvants in licensed vaccines (AS01/AS01/AS03/AS04/Alum) combined with a model antigen.

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: Currently, the worldwide incidence of major amputations in the general population is decreasing whereas the incidence of minor amputations is increasing. The purpose of our study was to analyze whether this trend is reflected among orthopaedic patients treated with lower extremity amputation in our orthopaedic university institution. : We conducted a single-center retrospective study and included patients referred to our orthopaedic department for lower extremity amputation (LEA) between January 2007 and December 2019.

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Background: Common diagnostic tools for prostate cancer-prostate-specific antigen and transrectal biopsy-show only low predictive value and poor sensitivity. This study examines circulating miRNA in saliva to explore the possibility of a non-invasive and easy-to-execute diagnostic tool for prostate cancer screenings.

Methods: 16 miRNAs were extracted from salivary exosomes and analyzed via the delta-CT method.

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Article Synopsis
  • This study examines the outcomes of patients with intermediate-high and high-risk pulmonary embolism treated with the Inari FlowTriever mechanical thrombectomy system.
  • A total of 27 patients were analyzed, showing significant improvements in pulmonary artery pressures and heart rates after the procedure, although there were some serious complications, including deaths.
  • The findings suggest that mechanical thrombectomy is a feasible option for high-risk PE patients with acceptable complication rates, highlighting the need for further research in larger populations.
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This literature review discusses the use of antibiotic loaded polymethylmethacrylate bone cements in arthroplasty. The clinically relevant differences that have to be considered when antibiotic loaded bone cements (ALBC) are used either for long-term implant fixation or as spacers for the treatment of periprosthetic joint infections are outlined. In this context, in vitro findings for antibiotic elution and material properties are summarized and transferred to clinical use.

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is a major cause of community-acquired pneumonia, bacteremia, and meningitis in older adults worldwide. Two pneumococcal vaccines containing capsular polysaccharides are in current use: the polysaccharide vaccine PPSV23 and the glycoconjugate vaccine PCV13. In clinical trials, both vaccines elicit similar opsonophagocytic killing activity.

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Purpose: The cranial epidural space (ES) is a potential space and is not generally recognized unless there is underlying pathology. With MRI in newborns, we have frequently observed T2 hyperintense thickening of the ES posterior to the confluence of sinuses, also referred to as "torcular pseudomass" (TP). We aim to identify the frequency of TP and possible associations with delivery.

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Background: Gestational diabetes mellitus is one of the most frequent pregnancy complications with a global prevalence of 13.4% in 2021. Pregnant women with COVID-19 and gestational diabetes mellitus are 3.

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  • The study compared proximal and distal embolization of the splenic artery in patients with splenic artery steal syndrome after liver transplant to determine the best embolization site for liver function improvement.
  • A retrospective review of 85 patients was conducted, focusing on liver function markers before and after embolization, with technical success noted in all procedures and a significant improvement in hepatic artery blood flow.
  • Results indicated that proximal embolization led to better outcomes for specific liver function tests (GPT and GOT) and thrombocyte counts shortly after the procedure, suggesting a potential preference for proximal embolization in treating SAS post-OLT.
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Drug-repurposing has been instrumental to identify drugs preventing SARS-CoV-2 replication or attenuating the disease course of COVID-19. Here, we identify through structure-based drug-repurposing a dual-purpose inhibitor of SARS-CoV-2 infection and of IL-6 production by immune cells. We created a computational structure model of the receptor binding domain (RBD) of the SARS-CoV-2 spike 1 protein, and used this model for screening against a library of 6171 molecularly defined binding-sites from drug molecules.

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Despite an increasing demand for pediatric home care nursing, there is no comprehensive or universal standard of care for prescribing pediatric home care nursing hours based on a child's medical complexity. Adoption of a qualification tool (QT) to allocate home care nursing hours based on the medical complexity of a child may mitigate inequality in access to care and improve the patient and family experience. A QT, developed in Minnesota, recommends home care nursing hours based on the level of medical complexity and need for skilled nursing interventions.

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Background: The primary aim of this study was to identify modifiable patient-related predictors of blood transfusions and perioperative complications in total hip and knee arthroplasty. Individual predictor-adjusted risks can be used to define preoperative treatment thresholds.

Methods: We performed this retrospective monocentric study in orthopaedic patients who underwent primary total knee or hip arthroplasty.

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Purpose: Posterior spinal epidural space (PSES) is a fat-containing space. We noted numerous spinal MRIs demonstrating T2-hyperintense thickening of the cervical/thoracic PSES in early newborns, resembling epidural edema. Our aim is to describe the appearance/frequency of this finding and explore any associations with delivery.

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Article Synopsis
  • - The study aimed to evaluate how effective a fast-track pathway (FTP) is for managing diabetic foot ulcers (DFUs) after two years of use, comparing patients referred early (ER) versus late (LR).
  • - Results showed that patients referred early had significantly higher healing rates (89.9% vs. 41.5%), shorter healing times (10 weeks vs. 16 weeks), and lower risks of amputation, hospitalization, and mortality compared to those referred late.
  • - The findings suggest that early referral is a strong predictor for better outcomes in DFU management, indicating that implementing the FTP has reduced late referrals and improved patient results.
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A 50-year-old female patient with cirrhosis due to alcoholic steatohepatitis was referred to our department because of recurrent hepatorenal syndrome (HRS) and hepatic hydrothorax. Clinically, severe anasarca was the leading problem. In contrast to previous episodes, HRS did not respond to standard treatment including terlipressin.

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Purpose: The aim of this study was to investigate the reinfection rate and risk factors for septic failure after two-stage exchange for chronic periprosthetic joint infections of primary total knee arthroplasties. Reinfections should be classified as new infection or as infection recurrence after two-stage exchange.

Methods: We performed a retrospective study of 60 knees with chronic periprosthetic joint infections.

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Critical to managing the spread of COVID-19 is the ability to diagnose infection and define the acquired immune response across the population. While genomic tests for the novel Several Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) detect the presence of viral RNA for a limited time frame, when the virus is shed in the upper respiratory tract, tests able to define exposure and infection beyond this short window of detectable viral replication are urgently needed. Following infection, antibodies are generated within days, providing a durable read-out and archive of exposure and infection.

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Vaccine development has the potential to be accelerated by coupling tools such as systems immunology analyses and controlled human infection models to define the protective efficacy of prospective immunogens without expensive and slow phase 2b/3 vaccine studies. Among human challenge models, controlled human malaria infection trials have long been used to evaluate candidate vaccines, and RTS,S/AS01 is the most advanced malaria vaccine candidate, reproducibly demonstrating 40 to 80% protection in human challenge studies in malaria-naïve individuals. Although antibodies are critical for protection after RTS,S/AS01 vaccination, antibody concentrations are inconsistently associated with protection across studies, and the precise mechanism(s) by which vaccine-induced antibodies provide protection remains enigmatic.

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  • The study compares pre-treatment tumor vascularization using contrast-enhanced CT or MRI with post-treatment lipiodol deposition in HCC patients after their first cTACE procedure.
  • Arterial tumor volumes showed a strong correlation with lipiodol deposition, indicating a significant relationship between imaging and treatment effectiveness.
  • Results suggest that lipiodol deposition is a useful reference for evaluating different imaging techniques, with CE MRI demonstrating greater sensitivity than CE CT for assessing tumor volumes post cTACE.
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In the version of this article originally published, there was an error in the abstract. The word disease should not have been included in the sentence "These individuals were highly exposed to Mtb but tested negative disease by IFN-γ release assay and tuberculin skin test, 'resisting' development of classic LTBI". The sentence should have been "These individuals were highly exposed to Mtb but tested negative by IFN-γ release assay and tuberculin skin test, 'resisting' development of classic LTBI.

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Exposure to Mycobacterium tuberculosis (Mtb) results in heterogeneous clinical outcomes including primary progressive tuberculosis and latent Mtb infection (LTBI). Mtb infection is identified using the tuberculin skin test and interferon-γ (IFN-γ) release assay IGRA, and a positive result may prompt chemoprophylaxis to prevent progression to tuberculosis. In the present study, we report on a cohort of Ugandan individuals who were household contacts of patients with TB.

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The effect of doubling the immersion fluid (eluate) volume on antibiotic concentrations and on mechanical stability from vancomycin and gentamicin loaded bone cements was investigated in vitro. Antibiotic loaded bone cements containing premixed 1.34% gentamicin antibiotic concentration in the cement powder (wt), premixed 1.

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Purpose: Copal® spacem is a new PMMA bone cement for fabricating spacers. This study compares elution of gentamicin, elution of vancomycin, and compressive strength of Copal® spacem and of Palacos® R+G at different vancomycin loadings in the powder of the cements. We hypothesized that antibiotic elution of Copal® spacem is superior at comparable compressive strength.

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