8/18/2023 0 Comments Anatomical phenomena definition![]() ![]() This rational comparison allows us to gain insight into the need for anatomically detailed arterial networks when addressing complex hemodynamic interactions.Īrterial function Blood flow Carotid occlusion Carotid steal Wave propagation. It has been the subject of much controversy and disagreement. Differences are even larger when modifications of the vascular anatomy are considered. Terminologia Anatomica, in a broad sense, is a list of terms that pertain to the anatomy of the human body. This agreement rapidly deteriorates for abnormal blood flow conditions such as those caused by total arterial occlusion. We conclude that physiologically meaningful agreement between models is obtained for normal hemodynamic conditions. ![]() Moreover, discrepancies between models are substantially accentuated in the case of anatomical variations or abnormal hemodynamic conditions. The anatomically detailed arterial network features improved predictive capabilities at peripheral vessels. Results show that detailed and simplified models are in reasonable agreement regarding the hemodynamics in larger vessels and in healthy scenarios. Mechanisms of blood flow delivery to the brain, as well as different blood flow steal phenomena, are unveiled in light of model predictions. Comparisons are performed under physiological conditions and for the case of common carotid artery occlusion. The comparison is performed quantitatively and qualitatively in terms of pressure and flow rate waveforms, wave intensity analysis and impedance analysis. ![]() To this end, results obtained with an anatomically detailed network containing over 2000 vessels are systematically compared with those obtained with an anatomically simplified network containing the main 86 vessels, the latter being a truncated version of the former one. Joint pain joint pathology vacuum joint vacuum phenomenon.The goal of this work is to assess the impact of vascular anatomy definition degree in the predictions of blood flow models of the arterial network. By identifying true anatomic VP, we can prevent harm from suboptimal treatment of patients. Underreporting of this phenomenon shows a lack of awareness of VP on the part of physicians. We have proposed criteria for diagnosing VP and generated a basic algorithm for its workup. VP should be on the differential diagnosis for joint pain, especially in the elderly. VP outside the spine is an underreported finding on imaging studies. Although most cases of VP are benign, it can be associated with clinical signs and symptoms. Trichromatic Theory How It Works Examples Modern Views Frequently Asked Questions Opponent process theory suggests that the ability to perceive color is controlled by three receptor complexes with opposing actions. CT, GRE-MRI, and multipositional views are the best imaging studies to view VP. Juliet White / Getty Images Table of Contents Opponent Process Theory vs. The formation of VP can be explained by gas solubility, pressure-volume relationships, and human physiology. We reviewed the literature to determine underlying mechanism, symptomology, associated pathologies, and clinical importance of VP. Two problematic scenarios can occur: a false-positive diagnosis of serious pathology instead of benign VP and a false-negative diagnosis of benign VP with a more serious underlying process Despite this potential for confusion, criteria for distinguishing VP from other causes of joint pain and for evaluating a suspected case of VP have not been fully established. Although VP is most often associated with degenerative joint disease, it is observed with other pathologies. ![]() Observation of this phenomenon has been demonstrated on basic radiographs, computed tomography, and magnetic resonance imaging. Vacuum phenomenon (VP) is an anatomical entity of potential confusion in the diagnosis and evaluation of joint pathology. ![]()
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