Results 11 to 20 of about 18,304 (208)

Daily artificial gravity partially mitigates vestibular processing changes associated with head-down tilt bedrest [PDF]

npj Microgravity
Microgravity alters vestibular signaling and reduces body loading, driving sensory reweighting. The unloading effects can be modelled using head-down tilt bedrest (HDT).
G. D. Tays, K. E. Hupfeld, H. R. McGregor, N. E. Beltran, Y. E. De Dios, E. Mulder, J. J. Bloomberg, A. P. Mulavara, S. J. Wood, R. D. Seidler   +9 more
doaj   +2 more sources

Is a Depth Camera in Agreement with an Electromagnetic Tracking Device when Measuring Head Position?

British and Irish Orthoptic Journal, 2021
Introduction: Clinicians typically observe and describe abnormal head postures (AHPs) and may also measure them. Depth cameras have been suggested as a reliable measurement device for measuring head position using face-tracking technology.
Vienna-Jaye Burchell, Gemma Arblaster, David Buckley, Jonathan Wheat   +3 more
doaj   +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

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

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

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

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

Comparison of arterial to end-tidal carbon dioxide gradient P (a-ET)CO2 in volume versus pressure controlled ventilation in patients undergoing robotic abdominal surgery in the Trendelenburg position. A randomised controlled study

Indian Journal of Anaesthesia, 2022
Background and Aims: Robotic surgery is increasingly prevalent as an advancement in care. Steep head-down positions in pelvic surgery can increase the ventilation-perfusion mismatch and increase ventilatory requirements to offset carbon dioxide (CO2 ...
Sugashini Veerasamy, Lakshmi Kumar, Anandajith Kartha, Sunil Rajan, Niranjan Kumar, Shyam S Purushottaman   +5 more
doaj   +1 more source

Sleep Is Compromised in −12° Head Down Tilt Position

Frontiers in Physiology, 2019
Recent studies are elucidating the interrelation between sleep, cranial perfusion, and cerebrospinal fluid (CSF) circulation. Head down tilt (HDT) as a simulation of microgravity reduces cranial perfusion.
Alessa L. Boschert, David Elmenhorst, David Elmenhorst, Peter Gauger, Zhili Li, Maria T. Garcia-Gutierrez, Darius Gerlach, Bernd Johannes, Jochen Zange, Andreas Bauer, Andreas Bauer, Jörn Rittweger, Jörn Rittweger   +12 more
doaj   +1 more source

Changes in cardiac function and hemodynamics during robot-assisted laparoscopic prostatectomy with steep head-down tilt: a prospective observational study

BMC Research Notes, 2017
Objective Robot-assisted laparoscopic prostatectomy requires the patient to be placed in a steep head-down tilt. The aim of our study was to investigate changes in cardiac index and left ventricular end-diastolic volume in a steep had-down tilt.
Naomi Ono, Junko Nakahira, Shoko Nakano, Toshiyuki Sawai, Toshiaki Minami   +4 more
doaj   +1 more source