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Experimental Study of a New Method for Early Detection of Vascular Access Stenoses: Pulse Pressure Analysis at Hemodialysis Needle KU Leuven Ghent University

Sunny Eloot, Pascal Verdonck
Hemodialysis vascular access (VA) stenosis remains a frequent complication. However, early detection is challenging and costly. The aim of this in vitro study was to assess a new detection method based on pulse pressure analysis at the hemodialysis needle. A silicon model of a radiocephalic arteriovenous fistula was built in a mock loop. Pressure profiles were measured at the arterial hemodialysis needle and in the proximal feeding artery. ...

New Method to Detect Early Vascular Access Stenosis: Pulse Pressure Analysis at Dialysis Needle Ghent University

Koen Van Canneyt, Nils Planken, Sunny Eloot, Patrick Segers, Pascal Verdonck
Aim: Hemodialysis vascular access stenosis remains a frequent complication and early detection is challenging and costly. The aim of this in-vitro study was to assess a new detection method based on analysis of the pulse pressure measured at the hemodialysis needle. Methods: A silicon model of a radio-cephalic arteriovenous fistula was built in a mock loop. Pressures were measured at the arterial hemodialysis needle and in the proximal feeding ...

Mineral resources in life cycle impact assessment : part II : recommendations on application-dependent use of existing methods and on future method development needs Ghent University

Markus Berger, Thomas Sonderegger, Rodrigo Freitas de Alvarenga, Vanessa Bach, Alexander Cimprich, Jo Dewulf, Rolf Frischknecht, Jeroen Guinée, Christoph Helbig, Tom Huppertz, et al.
Purpose Assessing impacts of abiotic resource use has been a topic of persistent debate among life cycle impact assessment (LCIA) method developers and a source of confusion for life cycle assessment (LCA) practitioners considering the different interpretations of the safeguard subject for mineral resources and the resulting variety of LCIA methods to choose from. Based on the review and assessment of 27 existing LCIA methods, accomplished in ...

Optimal needle placement for the accurate magnetic material quantification based on uncertainty analysis in the inverse approach Ghent University

Ahmed Mohamed Abouelyazied Abdallh, Guillaume Crevecoeur, Luc Dupré
The measured voltage signals picked up by the needle probe method can be interpreted by a numerical method so as to identify the magnetic material properties of the magnetic circuit of an electromagnetic device. However, when solving this electromagnetic inverse problem, the uncertainties in the numerical method give rise to recovery errors since the calculated needle signals in the forward problem are sensitive to these uncertainties. This ...

Single needle hemodialysis : is the past the future? Ghent University

Raymond Vanholder
Whereas the usual way to gain access to the vascular bed for hemodialysis is by inserting two needles, an alternative option based on the introduction of only one needle has been available for several decades. Although single needle hemodialysis gradually lost popularity in the early nineties of last century, this option now seems to make a come-back, with the current change in patient mix towards more elderly and cardio-vascular disease and the ...

Needle autopsy to establish the cause of death in HIV-infected hospitalized adults in Uganda Institute of Tropical Medicine Ghent University University of Antwerp

Janneke Cox, Robert L Lukande, Sam Kalungi, Eric Van Marck, Koen Van de Vijver, Andrew Kambugu, Ann M Nelson, Yukari C Manabe, Robert Colebunders

INTRODUCTION: Minimal invasive but accurate methods to establish the cause of death in HIV-infected patients are needed. We studied the agreement in cause of death between blind and ultrasound-guided needle autopsy and complete autopsy in HIV-infected patients in Uganda.

METHODS: We subsequently performed a blind and ultrasound-guided needle autopsy followed by a complete autopsy in HIV-infected adults who died during hospitalization. ...

Evaluation of a novel, patient-mounted system for CT-guided needle navigation : an ex vivo study Ghent University

Anna Mokry, Florian Willmitzer, Rafael Hostettler, Henning Richter, Patrick Kircher, Sibylle Kneissl, Stephan Wetzel
PurposeTo describe the features of a novel patient-mounted system for CT-guided needle navigation, the Puncture Cube System (PCS), and to evaluate the accuracy and efficiency of the PCS by (a) applying numerical simulations and (b) by conducting punctures using the system in comparison to punctures using the free-hand method (FHM).MethodsThe PCS consists of a self-adhesive cube that is attached to the patient, with multiple through-holes in the ...

Initial axillary staging of breast cancer using ultrasound-guided fine needle aspiration: a liquid-based cytology study. Vrije Universiteit Brussel

Ann Schiettecatte, Claire Bourgain, Cathérine Breucq, Nico Buls, Vally De Wilde, Johan De Mey
OBJECTIVE: To evaluate the preoperative detection of axillary metastasis
combining ultrasound (US)-guided fine needle aspiration cytology (FNAC) and
liquid-based cytology (Surepath(®)) to reduce sentinel node procedures.
METHODS: In total, 148 patients with clinically negative lymph nodes and no
preoperative therapy were included. All patients underwent preoperative
ultrasound of the axilla with FNAC if suspicious lymph ...