Výsledky vyhledávání - "Scott A, Dulchavsky"

Noninvasive indicators of intracranial pressure before, during, and after long-duration spaceflight

Autor: Jessica V. Jasien, Steven S. Laurie, Stuart M. C. Lee, David S. Martin, David T. Kemp, Douglas J. Ebert, Robert Ploutz-Snyder, Karina Marshall-Goebel, Irina V. Alferova, Ashot Sargsyan, Richard W. Danielson, Alan R. Hargens, Scott A. Dulchavsky, Michael B. Stenger, Brandon R. Macias

Publikováno v: Journal of Applied Physiology. 133:721-731

Weightlessness induces a cephalad shift of blood and cerebrospinal fluid that may increase intracranial pressure (ICP) during spaceflight, whereas lower body negative pressure (LBNP) may provide an opportunity to caudally redistribute fluids and lowe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f7ac5258d4121822aa34575240e0fcf6
https://doi.org/10.1152/japplphysiol.00625.2021

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Lower body negative pressure reduces jugular and portal vein volumes and counteracts the elevation of middle cerebral vein velocity during long-duration spaceflight

Autor: David Martin, Scott A. Dulchavsky, Douglas J. Ebert, K A Zuj, Ashot E. Sargsyan, Brandon R. Macias, Philippe Arbeille, Alan R. Hargens, Steven S. Laurie, Stuart M. C. Lee, Michael B. Stenger

Publikováno v: J Appl Physiol (1985)

Cephalad fluid shifts in space have been hypothesized to cause the spaceflight-associated neuro-ocular syndrome (SANS) by increasing the intracranial-ocular translaminal pressure gradient. Lower body negative pressure (LBNP) can be used to shift uppe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e5f3efa1b1cd9e32d49ad1b78ee9439
https://doi.org/10.1152/japplphysiol.00231.2021

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Intraocular pressure and choroidal thickness respond differently to lower body negative pressure during spaceflight

Autor: John H.K. Liu, Alan R. Hargens, Brandon R. Macias, I.V. Alferova, Scott A. Dulchavsky, Karina Marshall-Goebel, Steven S. Laurie, Robert Ploutz-Snyder, Scott H. Greenwald, Michael B. Stenger, Stuart M. C. Lee, Douglas J. Ebert

Publikováno v: J Appl Physiol (1985)

Spaceflight-associated neuro-ocular syndrome (SANS) develops during long-duration (>1 mo) spaceflight presumably because of chronic exposure to a headward fluid shift that occurs in weightlessness. We aimed to determine whether reversing this headwar

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a27e8ea18ec1128b299ecae6675d11f
https://pubmed.ncbi.nlm.nih.gov/34647835

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Association of Structural Changes in the Brain and Retina After Long-Duration Spaceflight

Autor: Scott A. Dulchavsky, Karina Marshall-Goebel, Brandon R. Macias, Connor R. Ferguson, Nimesh B. Patel, Ashot E. Sargsyan, Doug Ebert, Alan R. Hargens, Michael B. Stenger, Stuart M. C. Lee, Larry A. Kramer, Khader M. Hasan, Steven S. Laurie, Robert Ploutz-Snyder

Publikováno v: JAMA Ophthalmology. 139:781

Importance Long-duration spaceflight induces structural changes in the brain and eye. Identification of an association between cerebral and ocular changes could help determine if there are common or independent causes and inform targeted prevention s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3db198ebea91e862e8dfb4c6ac397f55
https://doi.org/10.1001/jamaophthalmol.2021.1400

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Changes in the Optic Nerve Head and Choroid Over 1 Year of Spaceflight

Autor: I.V. Alferova, Michael B. Stenger, Douglas J. Ebert, Scott A. Dulchavsky, Steven S. Laurie, Connor R. Ferguson, Alan R. Hargens, Stuart M. C. Lee, Thomas H. Mader, Brian C Samuels, Charles Robert Gibson, Robert Ploutz-Snyder, Brandon R. Macias, Tyson Brunstetter, Larry A. Kramer, Nimesh B. Patel

Publikováno v: JAMA Ophthalmol

Importance While 6-month data are available regarding spaceflight-associated neuro-ocular syndrome, manned missions for 1 year and beyond are planned, warranting evaluation for spaceflight-associated neuro-ocular syndrome beyond 6 months. Objective T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14711e1765e76fdce0e21f19dcad85fb
https://doi.org/10.1001/jamaophthalmol.2021.0931

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Preflight, In-Flight, and Postflight Imaging of the Cervical and Lumbar Spine in Astronauts

Autor: Ashot E. Sargsyan, Douglas J. Ebert, Kathleen Garcia, Michael F. Harrison, Roy Riascos-Castaneda, Scott A. Dulchavsky

Publikováno v: Aerospace medicine and human performance. 89(1)

Background Back pain is a common complaint during spaceflight that is commonly attributed to intervertebral disc swelling in microgravity. Ultrasound (US) represents the only imaging modality on the International Space Station (ISS) to assess its eti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a95b14657001dafae1d622d9e1cd15b7
https://pubmed.ncbi.nlm.nih.gov/29233242

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Real-time Ultrasound Assessment of Astronaut Spinal Anatomy and Disorders on the International Space Station

Autor: Ashot E. Sargsyan, Scott A. Dulchavsky, Michael F. Harrison, Kathleen M. Garcia, Douglas J. Ebert

Publikováno v: Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine. 37(4)

Objectives Back pain is one of the most common conditions of astronauts during spaceflight and is hypothesized to be attributed to pathologic anatomic changes. Ultrasound (US) represents the only available imaging modality on the International Space

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2dad0532d04b9f525e07f39b86eb61bb
https://pubmed.ncbi.nlm.nih.gov/28960477

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Educational benefits of fusing magnetic resonance imaging with sonograms

Autor: Gordon Jacobsen, Andrew Vollman, David Amponsah, Alexandria Dulchavsky, Howard Pinchcofsky, Marnix van Holsbeeck, Rachel Hulen, Scott A. Dulchavsky

Publikováno v: Journal of Clinical Ultrasound. 42:257-263

Purpose To investigate whether providing sonographic (US)/MRI fusion images will enhance the ability of medical students and radiology residents to identify MSK anatomy on sonograms alone. Methods Medical students (n = 31) and radiology residents (n

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::65d4f9811c974312bc9099f4a5ab90af
https://doi.org/10.1002/jcu.22136

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