Publications by authors named "Imfeld S"

Article Synopsis
  • - This study aimed to evaluate how well PET/CT and MRI can predict relapse in patients with large-vessel giant cell arteritis (LV-GCA) after they stop treatment.
  • - Researchers analyzed data from 40 patients who had their treatment stopped while in remission, comparing imaging results between those who relapsed and those who didn’t.
  • - The findings indicated that imaging scores from PET/CT and MRI did not significantly differ between relapsing and non-relapsing patients, suggesting these methods may not be effective for guiding treatment decisions in LV-GCA.
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We sought to investigate magnetic resonance imaging (MRI) parameters that correspond to vasculitis observed via [F]FDG positron emission tomography/computed tomography (PET/CT) and ultrasound in patients with large-vessel giant cell arteritis (LV-GCA). We performed a cross-sectional analysis of patients diagnosed with LV-GCA. Patients were selected if MRI, PET/CT, and vascular ultrasound were performed at the time of LV-GCA diagnosis.

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Objectives: To investigate the hypothesis that a history of PMR is associated with a more severe and damaging disease course in newly diagnosed GCA patients.

Methods: This was a retrospective analysis of GCA patients diagnosed between December 2006 and May 2021. We compared vascular ultrasound findings (presence of vasculitis and vascular stenosis) in GCA patients with and without prior PMR.

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Objectives: We evaluated the feasibility of a rapid glucocorticoid tapering regimen to reduce glucocorticoid exposure in patients with giant cell arteritis (GCA) treated with glucocorticoids only.

Methods: Newly diagnosed patients with GCA treated with a planned 26-week glucocorticoid tapering regimen at the University Hospital Basel were included. Data on relapses, cumulative steroid doses (CSD) and therapy-related adverse effects were collected from patients' records.

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Objectives: To characterise factors associated with permanent vision loss (PVL) and potential reasons for the therapeutic delay contributing to PVL in giant cell arteritis (GCA).

Methods: Retrospective analysis of GCA patients diagnosed at the University Hospital Basel between December 2006 and May 2021.

Results: Of 282 patients with GCA (64% females), 49 (17.

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Article Synopsis
  • The study aimed to find out how common subclinical giant cell arteritis (GCA) is in patients who have just been diagnosed with polymyalgia rheumatica (PMR), along with the factors that might predict its occurrence.
  • A systematic review analyzed 13 cohorts consisting of 566 patients, revealing that the prevalence of subclinical GCA was about 23%, increasing to 29% when using advanced imaging techniques like PET/CT.
  • Key predictors of subclinical GCA included inflammatory back pain, lack of lower limb pain, female sex, elevated temperature, weight loss, and specific blood counts, but the developed prediction model showed only modest accuracy.
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Article Synopsis
  • Researchers confirmed the effectiveness of SUV ratio cut-off values in diagnosing giant cell arteritis (GCA) using PET/CT scans in an independent group of 50 patients.
  • * The study involved identifying the vessel with the brightest radiotracer uptake, calculating a peak SUV ratio, and determining cut-off values for diagnosing vasculitis based on this ratio.
  • * The results showed high diagnostic accuracy, with an AUC of 0.91 for the supra-aortic region and a peak SUV ratio cut-off successfully streamlining the diagnostic process in clinical settings.
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Aims: To describe the feasibility and diagnostic accuracy of 18F-FDG positron emission tomography-computed tomography (PET/CT) of the temporal artery compared with temporal artery ultrasound and histology of the temporal artery in patients with suspicion of having giant cell arteritis (GCA).

Materials And Methods: Patients with suspected GCA were included. PET/CT standard uptake value ratios and the compression sign on ultrasound were assessed for the trunk, and parietal and frontal branches of the temporal artery.

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Background: Mental health (MH) conditions are highly prevalent, yet only marginal portions of children receive adequate services. Access to specialized mental healthcare is limited and, consequently, pediatricians remain the source of management and care of children with MH disorders. Despite this, research suggests that pediatricians report lack of access to training and support regarding MH care of youth, leading to discomfort with managing the population they are asked to treat.

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Introduction: The purpose of this article is to report on the implementation of a telemedicine network serving as a second opinion pool for a surgeon in a remote area of a developing country.

Methods: This study involved an international collaboration between two members of Swiss Surgical Teams at a tertiary referral hospital and a surgeon in a remote area in Gorno-Badakhshan Autonomic Oblast, Tajikistan, which established a second opinion pool discussing diagnostics and therapeutic options via a messenger application. A retrospective analysis of response times was performed using a series of 50 challenging cases.

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Background: It is not known what diagnoses are associated with an elevated D-dimer in unselected patients attending emergency departments (ED), nor have their associated outcomes been determined.

Methods: This was a prospective observational study of 1612 unselected patients attending a Danish ED, with 100% follow-up for 90 days after presentation.

Results: The 765 (47%) ED patients with an elevated D-dimer level (ie, ≥ 0.

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Objectives: [18F]Fluorodeoxyglucose (FDG)-PET/CT and US are both well established for diagnosing GCA. The present study investigates their accuracy and whether they provide overlapping or complementary information in a cohort of patients presenting with suspicion of GCA.

Methods: We selected consecutive patients from our cohort of suspected GCA cases that underwent both extended vascular US and PET/CT for diagnostic work-up between December 2006 and August 2012.

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While hair analysis is important and accepted in forensic applications, fundamental knowledge gaps still exist, exacerbated by a lack of knowledge of the incorporation mechanisms of substances into hair. The influence of the hair sampling location on the head on ethyl glucuronide (EtG) and cocaine concentrations was investigated by measuring the complete scalp hair of 14 (2 EtG, 4 cocaine, 8 both EtG and cocaine) study participants in a grid pattern for EtG, drugs of abuse, and benzodiazepines. Head skin perfusion and sweating rates were investigated to rationalize the concentration differences.

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Rapid estimates of the central venous pressure (CVP) can be helpful to administer early fluid therapy or to manage cardiac preload in intensive care units, operating rooms or emergency rooms in order to start and monitor an adequate medical therapy. Invasive CVP measurements have inherent and non-negligible complication rates as well as great expenditures. Several noninvasive methods of CVP measurements, like ultrasound-guided techniques, are available, but require trained skills and special equipment which might not be at hand in all situations.

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Objectives: To assess changes of arterial vessel wall morphology in large vessel GCA patients (LV-GCA) by repeated US.

Methods: Patients with LV-GCA on US examination were followed up 6, 12 and 24 months after diagnosis by US of the temporal, vertebral, carotid (common, internal, external), subclavian, axillary, femoral (deep, superficial and common) and popliteal arteries. Clinical and laboratory data were assessed at each visit.

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Aims: The usefulness of [18F] fluorodeoxyglucose-positron emission tomography/computed tomography ([18F]FDG-PET/CT) for diagnosing giant cell arteritis (GCA) has been previously reported. Yet, the interpretation of PET scans is not clear-cut. The present study aimed at determining the best method to analyse PET/CT in a large, real-life cohort of patients presenting with suspicion of GCA.

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 Inflammatory processes of the venous wall in acute deep vein thrombosis (DVT) play a role in thrombus formation and resolution. However, direct evaluation of the perivascular inflammation is currently not feasible.  To assess perivascular perfusion in acute proximal DVT using contrast-enhanced ultrasound (CEUS) reflecting perivenous inflammation and its association with systemic inflammatory markers in a single-centre, prospective observational study.

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Part one addressed the value of duplex ultrasound in the diagnostic workup of varicosis. The present article discusses the use of preinterventional, intrainterventional and postinterventional duplex ultrasound in endoluminal methods for the treatment of varices. It is a prerequisite for the planning, implementation, and follow-up of this form of therapy.

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An increasing number of patients with abdominal aortic aneurysms (AAAs) are undergoing endovascular aortic repair (EVAR) instead of open surgery. These patients require lifelong surveillance, and the follow-up imaging modality of choice has been traditionally computed tomography angiography (CTA). Repetitive CTA imaging is associated with cumulative radiation exposure and requires the administration of multiple doses of nephrotoxic contrast agents.

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Objectives: To compare the diagnostic performance between a vascular specialist and a rheumatologist not familiar with vascular ultrasound when applying the compression sign for the diagnosis of temporal arteritis.

Methods: Sixty consecutive patients with suspicion of giant cell arteritis were examined by both examiners. Compression of the temporal artery on both sides (stem and both branches) was performed to define whether signs of vasculitis, no vasculitis or an indefinite result were present.

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Contrast-enhanced ultrasound (CEUS) has emerged as a valuable imaging modality that complements and enhances standard vascular ultrasound imaging. Ultrasound contrast agents are gas-filled microbubbles that are injected intravenously and serve as intravascular tracers. Based on the properties to enhance and to quantify the macro- and microcirculation down to the capillary perfusion level in different vascular territories and organs, CEUS imaging has the potential to improve the diagnostic performance in the detection and characterisation of various vascular disorders reviewed in this article.

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