Varicectomy is a particularly useful procedure in the surgical treatment of varicose branch veins and perforating veins, since it allows selective estirpation without affecting the main trunk of the long saphenous vein (LSV). At the same time, there is usually no need of further sclerotherapy. The operation can be performed under local anaesthesia in the outpatient's department or, if a saphenofemoral junction insufficiency has to be simultaneously removed, during a short stay in hospital. The aesthetic results are remarkable. With the help of the new delicate instruments devised by Varady, the incisions are very small, making sutures unnecessary. All the varicose veins can be removed at once, there is no loss of blood and no need for prophylaxis against thrombosis and the postoperative ecchymosis is minimal. Thus the method can also be applied in elderly patients.
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PLoS One
January 2025
Institute of Molecular Life Sciences, HUN-REN Research Centre for Natural Sciences, Budapest, Hungary.
J Arthroplasty
October 2024
Department of Orthopaedic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.
Neural Netw
November 2022
Institute for Data Science Foundations, Hamburg University of Technology, Hamburg, Germany; Santa Fe Institute, Santa Fe, USA; Leipzig University, Leipzig, Germany.
Helmholtz Machines (HMs) are a class of generative models composed of two Sigmoid Belief Networks (SBNs), acting respectively as an encoder and a decoder. These models are commonly trained using a two-step optimization algorithm called Wake-Sleep (WS) and more recently by improved versions, such as Reweighted Wake-Sleep (RWS) and Bidirectional Helmholtz Machines (BiHM). The locality of the connections in an SBN induces sparsity in the Fisher Information Matrices associated to the probabilistic models, in the form of a finely-grained block-diagonal structure.
View Article and Find Full Text PDFKnee
October 2021
Department of Orthopaedic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA. Electronic address:
Background: Postoperative radiographs are commonly ordered after primary total knee arthroplasty (TKA), however, there is limited data on how often these films change management over the entire postoperative time course, and what should prompt imaging to maximize clinical utility.
Methods: A retrospective cohort study was conducted of patients ≥ 18 years old who underwent a primary TKA at two level one trauma centers. Postoperative data were collected to determine the frequency of postoperative radiograph series, radiograph findings that did not suggest normal healing or alignment to radiologist and orthopedists, and changes in postoperative management.
JACC Cardiovasc Imaging
September 2021
Department of Medicine, Columbia University Irving Medical Center and New York-Presbyterian Hospital, New York, New York, USA; Seymour, Paul and Gloria Milstein Division of Cardiology, Columbia University Irving Medical Center and New York-Presbyterian Hospital, New York, New York, USA; Department of Radiology, Columbia University Irving Medical Center and New York-Presbyterian Hospital, New York, New York, USA. Electronic address:
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