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Optical Hemodynamic Imaging of Jugular Venous Dynamics During Altered Central Venous Pressure [article]

Robert Amelard, Andrew D Robertson, Courtney A Patterson, Hannah Heigold, Essi Saarikoski, Richard L Hughson
2021 arXiv   pre-print
The proposed non-contact optical imaging system demonstrated jugular venous dynamics consistent with invasive central venous monitoring during three protocols that altered central venous pressure.  ...  An optical imaging system is proposed for quantitatively assessing jugular venous response to altered central venous pressure.  ...  In this paper, we propose an optical imaging system to assess jugular venous dynamics associated with altered CVP.  ... 
arXiv:2007.11527v3 fatcat:yxxdecw65jglrhlc6ftneyr6ou

Assessing jugular venous compliance with optical hemodynamic imaging by modulating intrathoracic pressure [article]

Robert Amelard, Nyan Flannigan, Courtney A Patterson, Hannah Heigold, Richard L Hughson, Andrew D Robertson
2022 bioRxiv   pre-print
Cardiovascular disease and microgravity can alter central venous pressure (CVP) and venous return, which may contribute to increased intracranial pressure and decreased cardiac output.  ...  Aim: We investigated the feasibility of quantifying jugular venous compliance from jugular venous attenuation (JVA), a non-contact optical measurement of blood volume, alongside CVP from antecubital vein  ...  Acknowledgments This work was supported by the Natural Sciences and Engineering Research Council of Canada (PDF-503038-2017) and Canada Space Agency (18FAWATA13).  ... 
doi:10.1101/2022.06.28.497963 fatcat:hvb7z66lyzaubcwuo2v7e2r3c4

Does Long-Duration Exposure to Microgravity Lead to Dysregulation of the Brain and Ocular Glymphatic Systems?

Peter Wostyn, Thomas H Mader, Charles Robert Gibson, Maiken Nedergaard
2022 Eye and Brain  
Given that enlarged perivascular spaces in space crews may be a marker of altered venous hemodynamics and reduced cerebrospinal fluid outflow, at the level of the optic nerve and eye, these disturbances  ...  Spaceflight-associated neuro-ocular syndrome (SANS) has been well documented in astronauts both during and after long-duration spaceflight and is characterized by the development of optic disc edema, globe  ...  We hypothesize that altered venous hemodynamics during spaceflight may cause disruption of the glymphatic system.  ... 
doi:10.2147/eb.s354710 pmid:35546965 pmcid:PMC9081191 fatcat:pa772amcpjgctoyyi4ph55lkqa

Cerebral venous congestion correlates to acute aneurysm rupture: An illustrative case with Doppler ultrasonography study

V. Annese, N. Murdeu, C. Frau, M. Gregorio, S. Sanguigni
2020 eNeurologicalSci  
The mass effect of the aneurysm determined venous sinus compression and changed the hemodynamic of the cerebral venous flow.  ...  We believe that venous outflow obstruction and a high intracranial venous pressure gradient may be a cerebral aneurysm rupture factor.  ...  [12] About 70-80% of the intracranial blood volume is located in the venous system. Alteration of ICP results in changes of venous flow velocities.  ... 
doi:10.1016/j.ensci.2020.100231 pmid:32181376 pmcid:PMC7066058 fatcat:evxrh7lujvd3hk3phnptbas2hq

Spaceflight-Induced Intracranial Hypertension and Visual Impairment: Pathophysiology and Countermeasures

Li-Fan Zhang, Alan R. Hargens
2018 Physiological Reviews  
of hydrostatic pressures and altered hemodynamics in the intracranial circulation and the cerebrospinal fluid system.  ...  A chronic mismatch between ICP and intraocular pressure (IOP) in space may acclimate the optic nerve head, lamina cribrosa, and optic nerve subarachnoid space to a condition that is maladaptive to Earth  ...  hemodynamics and the CSF dynamics?  ... 
doi:10.1152/physrev.00017.2016 pmid:29167331 fatcat:hs2j6yjng5drjaugmvm5fyo5ua

Alternatives to the Swan–Ganz catheter

Daniel De Backer, Jan Bakker, Maurizio Cecconi, Ludhmila Hajjar, Da Wei Liu, Suzanna Lobo, Xavier Monnet, Andrea Morelli, Sheila Neinan Myatra, Azriel Perel, Michael R. Pinsky, Bernd Saugel (+3 others)
2018 Intensive Care Medicine  
If the patient does not rapidly respond to therapy or complex hemodynamic alterations are observed, pulse wave analysis coupled with TPTD is suggested.  ...  Whenever available, echocardiography should be performed as it provides a rapid and comprehensive hemodynamic evaluation.  ...  Central venous pressure: uses and misuses The central venous pressure (CVP) is measured at the tip of a central venous catheter. Its normal value ranges between 0 and 3 mmHg.  ... 
doi:10.1007/s00134-018-5187-8 pmid:29725695 fatcat:f4swng45sfdmtgyf5dvhfcfsde

Keyword Index

2012 Perspectives in Medicine  
B-mode sonography of the optic nerve in neurological disorders with altered intracranial pressure, 404 Optic nerve sonography B-mode sonography of the optic nerve in neurological disorders with altered  ...  intracranial pressure, 404 Optic neuritis Ultrasound fi ndings of the optic nerve and its arterial venous system in multiple sclerosis patients with and without optic neuritis vs. healthy controls  ... 
doi:10.1016/s2211-968x(12)00134-9 fatcat:j2etbk4v3beizjti3jml6yowwq

Abstract Book of the 5th Annual Meeting of the International Society for Neurovascular Disease

Marcello Mancini
2015 Veins and Lymphatics  
Book of the 5th Annual Meeting of the International Society for Neurovascular DiseaseMarch 27-29th, 2015 - Naples, Italy  ...  Acknowledgements of Supporters & Corporate Members We gratefully acknowledge the following companies and organization for providing grant support of quality medical education.  ...  In these cases, instability of intracranial dynamics may lead to uncontrollable increase in intracranial pressure, with the development of large ICP waves. 1 A further example simulates hemodynamics  ... 
doaj:471b7b244b3b426f928138517111dfdb fatcat:q5kenxy6pfc45nitkah4os7ojy

Table of Contents

2021 IEEE Transactions on Biomedical Engineering  
Paskaranandavadivel 2574 Optical Hemodynamic Imaging of Jugular Venous Dynamics During Altered Central Venous Pressure. . . . . . . .  ...  Behar 2447 Robust and Interpretable Convolutional Neural Networks to Detect Glaucoma in Optical Coherence Tomography Images . . . . . . . . . . . . . . . . . . . . . . . . . . . . K. A. Thakoor, S.  ... 
doi:10.1109/tbme.2021.3093139 fatcat:lwqekvtx2vdfxbj6s5l4ossdte

Space Flight-Associated Neuroocular Syndrome, Idiopathic Intracranial Hypertension, and Pseudotumor Cerebri: Phenotypic Descriptions, Pathogenesis, and Hydrodynamics

Hassan Kesserwani
2021 Cureus  
Recent spectacular data on the histology of the blood nerve-barrier of the optic nerve disc and the glymphatic system of the optic nerve sheath will also help us understand the development of optic disc  ...  The key to understanding the phenomenon of optic disc edema is the geometry of the optic nerve sheath, which is a simulacrum of an inverted Venturi tube.  ...  Abdominal obesity may increase abdominal pressure and central venous pressure with secondary venous distension of the internal jugular vein and increased intracranial pressure.  ... 
doi:10.7759/cureus.14103 pmid:33907644 pmcid:PMC8067672 fatcat:3zlnxook3va57o6zfe62u4diyy

Management of vascular causes of pulsatile tinnitus

Kazim H Narsinh, Ferdinand Hui, Madhavi Duvvuri, Karl Meisel, Matthew R Amans
2022 Journal of NeuroInterventional Surgery  
Pulsatile tinnitus is a debilitating symptom affecting millions of Americans and can be a harbinger of hemorrhagic or ischemic stroke.  ...  When a vascular cause of pulsatile tinnitus has been established, attention must be focused on the patient's risk of hemorrhagic stroke, ischemic stroke, or blindness, as well as the risks of the available  ...  The stenosis causes altered hemodynamics and turbulence that reverberates through the temporal bone to auditory structures. 21 Venous sinus stenting has been used to alleviate symptoms in small series  ... 
doi:10.1136/neurintsurg-2021-018015 pmid:35145036 pmcid:PMC9363535 fatcat:cqz6tu334bfsjewpejurvazx4q

Monitoring and Surveillance of Hemodialysis Access

Nischal Koirala, Evamaria Anvari, Gordon McLennan
2016 Seminars in interventional radiology  
Dynamic venous pressure is measured in the presence of extracorporeal blood.  ...  Direct venous pressure (DVP) measurement and static pressure measurement are the two pressure parameters used in the calculation of flow.  ... 
doi:10.1055/s-0036-1572548 pmid:27013773 pmcid:PMC4806702 fatcat:6gk5h4a2kzd33kai2md7xde67a

Effects of Positioning on Cerebral Oxygenation

Paul Soeding
2013 Current Anesthesiology Reports  
However, the dynamic coupling that exists between cerebral arterial, venous and cerebrospinal fluid volumes may influence oximetric readings during postural change.  ...  Cerebral oximetry is emerging as a monitor of cerebral perfusion with widespread application in many types of surgery.  ...  use of laboratory equipment for the former.  ... 
doi:10.1007/s40140-013-0020-y fatcat:wielxhwg7ff7pot2tpqkpjqafa

Physiology of cerebral venous blood flow: from experimental data in animals to normal function in humans

B. Schaller
2004 Brain Research Reviews  
For this reason, experimental research on specific biophysical (fluid dynamic, rheologic factors) and hemodynamic (venous pressure, cerebral venous blood flow) parameters of the cerebral venous system  ...  As the state-of-theart-imaging methods are playing a greater role in visualizing the intracranial venous system at present, its clinically pertinent anatomy and physiology has gain increasing interest,  ...  Eckenhoff [30] explained the cerebral venous outflow as a dynamic state: during expiration, high-intrathoracic pressure causes a major proportion of blood to drain via the vertebral plexus; during inspiration  ... 
doi:10.1016/j.brainresrev.2004.04.005 pmid:15571768 fatcat:feizhbbnazal3bjckagatcgnhe

Relationship of Effective Circulating Volume with Sublingual Red Blood Cell Velocity and Microvessel Pressure Difference: A Clinical Investigation and Computational Fluid Dynamics Modeling

Athanasios Chalkias, Michalis Xenos
2022 Journal of Clinical Medicine  
We assessed the correlation of mean circulatory filling pressure analogue (Pmca) with sublingual microcirculatory perfusion and red blood cell (RBC) velocity using SDF+ imaging and a modified optical flow-based  ...  The characteristics of physiologic hemodynamic coherence are not well-investigated.  ...  The authors would like to thank the medical and nursing stuff of the Department of Anesthesiology of the University Hospital of Larisa, Greece, for their assistance during the study period.  ... 
doi:10.3390/jcm11164885 pmid:36013124 pmcid:PMC9410298 fatcat:3iapz7cuurhhhbtyxeys5xnluq
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