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Pneumoperitoneum Does Not Influence Spread of Local Anesthetics in Midaxillary Approach Transversus Abdominis Plane Block A Descriptive Cadaver Study KU Leuven
BACKGROUND AND OBJECTIVES: The transversus abdominis plane (TAP) block can be used as part of a multimodal analgesia protocol after abdominal surgery. This study investigated whether a pneumoperitoneum during abdominal surgery influences the spread of local anesthetics. METHODS: Nine fresh frozen cadavers were used for the study. Using an ultrasound-guided midaxillary technique, a unilateral TAP block-like injection with 20 mL of methylene blue ...
In vivo contact stress evaluation in the trapeziometacarpal joint using finite deformation biphasic theory and mathematical modeling KU Leuven
The assessment of the contact biomechanics in the trapeziometacarpal (TMC) joint during functional tasks represents a relevant way to obtain a better understanding of the onset of osteoarthritis (OA). CT scans of the hand region of 20 female volunteers were taken in relaxed neutral, lateral key pinch and power grasp configuration. 3D models of the first metacarpal (MC1) and the trapezium were created. The articular area of each bone was ...
Evolution of the human hip. Part 2: muscling the double extension KU Leuven
Part 1 of this article outlined the extensive osseous adaptations around the hip that occurred in the development of a habitual bipedal gait in modern humans. The shortest summary of these osseous changes is 'double extension', i.e. extension of both the hip joint and the lumbar spine. Not surprisingly, these osseous changes went hand in hand with major muscular changes. The primary changes that accompanied the double extension were changes in ...
Segmentation of 4D CT bone images by sequential registration KU Leuven
© 2015 IEEE. The introduction of 4D image acquisition techniques has made it possible to analyse anatomical motion in vivo. With 4D computed tomography (CT), it is now possible to study the motion of joints leading to a deeper understanding of the role of morphology on joint motion and a better assessment of pathologies. Although 4D CT shows a lot of opportunities, the workload to process these 4D acquisitions has increased dramatically. A major ...
The Segond fracture: a bony avulsion of the anterolateral ligament of the knee KU Leuven
PURPOSE: The purpose of this study was to investigate the relation of the Segond fracture with the anterolateral ligament (ALL) of the knee. METHODS: To identify the soft-tissue structure causative for the Segond fracture, a study was set up to compare anatomic details of the tibial insertion of the recently characterized ALL in cadaveric knees (n = 30) with radiologic data obtained from patients (n = 29) with a possible Segond fracture based on ...
Evolution of the human hip. Part 1: the osseus framework KU Leuven
Extensive osseous adaptations of the lumbar spine, pelvis, hip and femur characterize the emergence of the human bipedal gait with its 'double extension' of the lumbar spine and hip. To accommodate lumbar lordosis, the pelvis was 'compacted', becoming wider and shorter, as compared with the non-human apes. The hip joint acquired a much more extended position, which can be seen in a broader evolutionary context of verticalization of limbs. When ...
Segmentation accuracy of long bones KU Leuven
The use of three-dimensional imaging methodologies in new applications in the orthopaedic field has introduced a need for high accuracy, in addition to a correct diagnosis. The aim of this study was to quantify the absolute dimensional errors between models reconstructed from computed tomography and magnetic resonance images compared to a ground truth for various regions of the bone. Clinical CT and MRI scans were acquired from nine lower leg ...
The Subtalar Joint Axis Palpation Technique Part 2: Reliability and Validity Results Using Cadaver Feet KU Leuven Universiteit Antwerpen
BACKGROUND: Clinically locating the point of no rotation to determine the subtalar joint axis location by applying pressure on the plantar surface of the foot was described by Kirby in 1987 but was never validated. We sought to extend a previously validated mechanical model to cadaver feet and to examine the intratester and intertester reliability. METHODS: Four testers with different levels of experience determined the subtalar joint axis ...
The Subtalar Joint Axis Palpation Technique-Part 1 Validating a Clinical Mechanical Model KU Leuven Universiteit Antwerpen Universiteit Gent
BACKGROUND: Locating the position of the subtalar joint axis can be a predictive clinical variable in biomechanical analysis and a valuable tool in the design of functional foot orthoses. Before testing Kirby's palpation technique to locate the subtalar joint axis in cadavers, it was important to develop and test the experimental methods in a mechanical model in which the exact location of the hinge joint can be controlled. METHODS: Four testers ...