Results 21 to 30 of about 3,322,345 (245)

Segmental volume changes that occur in nonhuman primates during short term head up (HUT) and head down (HDT) tilt

Journal of Electrical Bioimpedance, 2020
Nonhuman primates are often used in biomedical research and to investigate physiologic processes that occur in man. Impedance plethysmography was used to measure calf, thigh, pelvic, abdominal, and thoracic volume changes in ten Rhesus and eight squirrel
Montgomery Leslie David, Oloff Clarence
doaj   +1 more source

Temporal artery flow response during the last minute of a head up tilt test, in relation with orthostatic intolerance after a 60 day head-down bedrest. [PDF]

PLoS ONE, 2011
OBJECTIVE: Check if the Temporal flow response to Tilt could provide early hemodynamic pattern in the minutes preceding a syncope during the Tilt test performed after a 60-d head down bedrest (HDBR). METHOD: Twenty-one men divided into 3 groups [Control (
Philippe Arbeille, Ming Yuan, Yanqiang Bai, Shizhong Jiang, Gullemette Gauquelin, Patrick Aubry, Yuming Wan, Marc Antoine Custaud, Yinghui Li   +8 more
doaj   +1 more source

Segmental volume and circulatory changes that occur in humans and Rhesus monkeys during 4 hour, −6 degree head down tilt

Journal of Electrical Bioimpedance, 2021
Nonhuman primates are often used to investigate physiologic processes that occur in man during aerospace/cardiovascular orthostatic research. Few studies have compared nonhuman primates and man under identical test conditions to assess the degree of ...
Montgomery Leslie David, Oloff Clarence
doaj   +1 more source

Gravitational Dose‐Response Curves for Acute Cardiovascular Hemodynamics and Autonomic Responses in a Tilt Paradigm

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2022
Background The cardiovascular system is strongly dependent on the gravitational environment. Gravitational changes cause mechanical fluid shifts and, in turn, autonomic effectors influence systemic circulation and cardiac control.
Richard S. Whittle, Nathan Keller, Eric A. Hall, Hrudayavani S. Vellore, Lindsay M. Stapleton, Katherine H. Findlay, Bonnie J. Dunbar, Ana Diaz‐Artiles   +7 more
doaj   +1 more source

Supplemental Video 1: Veno-arterial bundles and valve recruitment during head-up tilt.

, 2023
Examples of deep femoral vein valve recruitment during -6 degree head-down tilt, supine rest, 20 degree head-up tilt, and 40 degree head-up tilt. SFA = superficial femoral artery, DFV = deep femoral vein.
Jason Au (6893915), Rose Samra (16414378), Jeremy Cohen (16414377)   +2 more
core   +1 more source

The effects of Trendelenburg Position on Patient Care during Open Radical Prostatectomy: A Randomized Controlled Clinical Trial [PDF]

Journal of Evidence-Based Care, 2023
Background: Low quality of surgical field is a common problem during open radical prostatectomy (ORP). Aim: This study was performed aimed to survey the effects of Trendelenburg position on the quality of surgical field, mean arterial blood pressure ...
Behzad Imani, Hanieh Bahadori, Salman Khazaie, Mohammad Ali Amirzargar   +3 more
doaj   +1 more source

Noninvasive intracranial pressure real-time waveform analysis monitor during prostatectomy robotic surgery and Trendelenburg position: case report

Brazilian Journal of Anesthesiology, 2021
Both robotic surgery and head-down tilt increase intracranial pressure by impairing venous blood outflow. Prostatectomy is commonly performed in elderly patients, who are more likely to develop postoperative cognitive disorders.
Gabriela Tognini Saba, Vinicius Caldeira Quintão, Suely Pereira Zeferino, Claudia Marquez Simões, Rafael Ferreira Coelho, Arnaldo Fazoli, William Nahas, Gustavo Henrique Frigieri Vilela, Maria José Carvalho Carmona   +8 more
doaj   +1 more source

Image_1_Effect of head-down tilt on clinical outcome and cerebral perfusion in ischemic stroke patients: A case series.PDF

, 2022
BackgroundThe effect of head position on stroke is not clear. The current study aimed to observe the effect of head-down tilt on acute ischemic stroke (AIS) patients with large vessel occlusion.MethodsWe observed the influence of head-down tilt position ...
Hui-Sheng Chen (6691241), Zi-Ai Zhao (6691238), Shou-Liang Qi (13860599), Lin Tao (4236), Yu Cui (160305), Nan-Nan Zhang (3757912), Meng Li (79487)   +6 more
core   +1 more source

Implementation of exercise countermeasures during spaceflight and microgravity analogue studies: Developing countermeasure protocols for bedrest in older adults (BROA)

Frontiers in Physiology, 2022
Significant progress has been made in the development of countermeasures to attenuate the negative consequences of prolonged exposure to microgravity on astronauts’ bodies.
Eric T. Hedge, Eric T. Hedge, Courtney A. Patterson, Carmelo J. Mastrandrea, Vita Sonjak, Guy Hajj-Boutros, Andréa Faust, José A. Morais, José A. Morais, Richard L. Hughson   +9 more
doaj   +1 more source

Author Correction: Effect of 60 days of head down tilt bed rest on amplitude and phase of rhythms in physiology and sleep in men [PDF]

npj Microgravity
María-Ángeles Bonmatí-Carrión, Nayantara Santhi, Giuseppe Atzori, Jeewaka Mendis, Sylwia Kaduk, Derk-Jan Dijk, Simon N. Archer   +6 more
doaj   +2 more sources