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Hypermagnesemia- and Hyperphosphatemia-Associated Cardiac Arrest after Injection of a Novel Magnesium-Based Bone Cement in Spinal Surgery.
J Am Acad Orthop Surg Glob Res Rev
January 2025
From the Department of Orthopaedic Surgery, Singapore General Hospital, Singapore (Dr. Loh, Dr. Ling, Dr. Jiang, and Lim) and the Department of Surgical Intensive Care, Division of Anaesthesiology and Perioperative Medicine, Singapore General Hospital, Singapore (Dr. Goh).
We report a case of pulseless electrical activity (PEA) associated with profound hypermagnesemia immediately after cementation of a novel magnesium-based cement in spine surgery. During T8 to T12 posterior instrumentation and decompression laminectomy for vertebral metastasis secondary to lung cancer, a 61-year-old Chinese woman developed sudden hypotension and went into PEA immediately after injection of a novel magnesium-based cement. Intraoperative fluoroscopic imaging did not show any notable cement extravasation.
View Article and Find Full Text PDFSingle-View Fluoroscopic X-Ray Pose Estimation: A Comparison of Alternative Loss Functions and Volumetric Scene Representations.
J Imaging Inform Med
December 2024
Department of Radiology, Northwestern Medicine, Northwestern University, Chicago, IL, USA.
Many tasks performed in image-guided procedures can be cast as pose estimation problems, where specific projections are chosen to reach a target in 3D space. In this study, we construct a framework for fluoroscopic pose estimation and compare alternative loss functions and volumetric scene representations. We first develop a differentiable projection (DiffProj) algorithm for the efficient computation of Digitally Reconstructed Radiographs (DRRs) from either Cone-Beam Computerized Tomography (CBCT) or neural scene representations.
View Article and Find Full Text PDFLUFT: A low-frequency ultrasound tomography system designed for lung imaging.
IEEE Sens J
April 2024
Department of Mathematics and the School of Biomedical Engineering, Colorado State University, Fort Collins, CO 80523 USA.
Pulmonary imaging with ultrasound in the conventional MHz range suffers from significant artifacts, as the high frequency acoustic waves primarily reflect off of the lung pleura with little to no penetration through the lung tissue. Furthermore, B-mode ultrasound images are difficult to interpret and require a skilled technician to obtain. Motivated by the finding that acoustic frequencies in the kHz penetrate lung tissue, a low-frequency tomographic ultrasound system is presented.
View Article and Find Full Text PDFEffectiveness of Additive Manufactured Titanium Implants in the Reconstruction of Large Cranial Defects: Case Series and Review of Literature.
J Maxillofac Oral Surg
December 2024
INHS Kalyani, Visakhapatnam, AP 530005 India.
Introduction: Replacement of lost soft and hard tissues of the human body has always been a daunting task across all surgical specialties. Reconstruction of a cranial deformity is challenging due to the functional and cosmetic requirements. A major constraint with large cranial bony deformity reconstruction is the nonavailability of graft of a specific shape and size.
View Article and Find Full Text PDFA study of the incidence of the corona mortis within a South African patient sample using computerized tomographic angiography.
Injury
December 2024
Department of Anatomy, Faculty of Health Sciences, School of Medicine, University of Pretoria, Gauteng, 9 Bophela Road, South Africa. Electronic address:
Introduction: Retropubic hematomas are a common development in cases of pelvic ring trauma and post- operative repair of fractures to the anterior column of the pelvis. Early detection and diagnosis of such events using computed tomography angiography (CTA) are critical for successful intervention and patient recovery, especially when bleeding is a result of injury to the corona mortis (CM). The CM is the communication between the obturator vessels and the external iliac vessels typically via an accessory obturator vessel.
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