Results 11 to 20 of about 51,698 (318)

Estimation of heart rate variability from finger photoplethysmography during rest, mild exercise and mild mental stress

Journal of Electrical Bioimpedance, 2021
Due to the possibilities in miniaturization and wearability, photoplethysmography (PPG) has recently gained a large interest not only for heart rate measurement, but also for estimating heart rate variability, which is derived from ECG by convention. The
Singstad Bjørn-Jostein, Azulay Naomi, Bjurstedt Andreas, Bjørndal Simen S., Drageseth Magnus F., Engeset Peter, Eriksen Kari, Gidey Muluberhan Y., Granum Espen O., Greaker Matias G., Grorud Amund, Hewes Sebastian O., Hou Jie, Llop Recha Adrián M., Matre Christoffer, Seputis Arnoldas, Sørensen Simen E., Thøgersen Vegard, Joten Vegard Munkeby, Tronstad Christian, Martinsen Ørjan G.   +20 more
doaj   +1 more source

Modelling Dynamically Re-sizeable Electrodes (DRE) for Targeted Transcutaneous Measurements in Impedance Plethysmography [PDF]

, 2020
Impedance plethysmography of extremities typically uses band electrodes around limbs to monitor changes in blood volume. This often causes monitored blood variations to only generate minuscule impedance values relative to the measured baseline ...
Constantinou, L., Hashim, Z.Q., Triantis, I.   +2 more
core   +1 more source

Perfusion index as an early predictor of hypotension following spinal anesthesia for cesarean section

Journal of Obstetric Anaesthesia and Critical Care, 2020
Introduction: Hypotension is a common complication after spinal anesthesia for cesarean delivery which is caused by sympathetic block 1. This can result in adverse maternal and fetal outcomes.
Roshana Prasad Mallawaarachchi, Vasanthi Pinto, P H D P De Silva   +2 more
doaj   +1 more source

Thoracoabdominal asynchrony: Two methods in healthy, COPD, and interstitial lung disease patients. [PDF]

PLoS ONE, 2017
Thoracoabdominal asynchrony is the nonparallel motion of the ribcage and abdomen. It is estimated by using respiratory inductive plethysmography and, recently, using optoelectronic plethysmography; however the agreement of measurements between these 2 ...
Mayra Caleffi Pereira, Desiderio Cano Porras, Adriana Claudia Lunardi, Cibele Cristine Berto Marques da Silva, Renata Cléia Claudino Barbosa, Letícia Zumpano Cardenas, Renata Pletsch, Jeferson George Ferreira, Isac de Castro, Celso Ricardo Fernandes de Carvalho, Pedro Caruso, Carlos Roberto Ribeiro de Carvalho, André Luis Pereira de Albuquerque   +12 more
doaj   +1 more source

Plethysmography System to Monitor the Jugular Venous Pulse: A Feasibility Study

Diagnostics, 2021
Cerebral venous outflow is investigated in the diagnosis of heart failure through the monitoring of jugular venous pulse, an indicator to assess cardiovascular diseases.
Antonino Proto, Daniele Conti, Erica Menegatti, Angelo Taibi, Giacomo Gadda   +4 more
doaj   +1 more source

Post-COVID changes in lung function 6 months after veno-venous extracorporeal membrane oxygenation: a prospective observational clinical trial

Frontiers in Medicine, 2023
BackgroundSevere coronavirus disease 2019 (COVID-19) may require veno-venous extracorporeal membrane oxygenation (V-V ECMO). While V-V ECMO is offered in severe lung injury to COVID-19, long-term respiratory follow-up in these patients is missing ...
Alexandra Pálfi, Ádám L. Balogh, Gabriella Polónyi, Domonkos Schulcz, Éva Zöllei, Gábor Bari, Gergely H. Fodor, Kristóf Baráth, Attila Somfay, Ferenc Peták, Barna Babik   +10 more
doaj   +1 more source

Preoperative “R wave amplitude variation” on electrocardiogram predicts severe hypovolemia

Annals of Cardiac Anaesthesia, 2019
Preoperative fasting is essential to prevent aspiration and associated complications. However, quite often patients end up fasting for 12 h or more due to changes in the operating room schedules, delays, and postponements.
Sohan Lal Solanki, Pooja P Kumar, Reshma P Ambulkar   +2 more
doaj   +1 more source

A venous occlusion plethysmography using a load cell as the sensing element [PDF]

, 1990
An application of the load cell as a sensor in venous occlusion plethysmography is presented. In this method the limb volume changes that follow venous occlusion are converted into water volume changes using a water tank for volume change detection.
Oberg, P. Ake, Yamamoto, Tatsuya, Yamamoto, Yoshitake, Yoshida, Akiharu   +3 more
core   +1 more source

The Impact of Stretching Intensities on Neural and Autonomic Responses: Implications for Relaxation

Sensors, 2023
Stretching is an effective exercise for increasing body flexibility and pain relief. This study investigates the relationship between stretching intensity and relaxation effects, focusing on brainwaves and autonomic nervous system (ANS) activity. We used
Naoto Imagawa, Yuji Mizuno, Ibuki Nakata, Natsuna Komoto, Hanako Sakebayashi, Hayato Shigetoh, Takayuki Kodama, Junya Miyazaki   +7 more
doaj   +1 more source

Venous occlusion plethysmography vs. Doppler ultrasound in the assessment of leg blood flow kinetics during different intensities of calf exercise [PDF]

, 2017
PurposeIt has recently been shown that venous occlusion plethysmography (VOP) can successfully assess the rate of increase in leg blood flow (LBF) (LBF kinetics) responses during calf exercise, but there is lack of data supporting its validity ...
Egana, Mikel, Gildea, Norita, Green, Simon, Murphy, Elanie, Rocha, Joel   +4 more
core   +2 more sources