We propose the visualization of venous compliance (VC) using a digital red-green-blue (RGB) camera. The new imaging method, which transforms RGB values into VC, combines VC evaluation with blood concentration estimation from the RGB values of each pixel. We evaluate a non-contact plethysmography (NCPG) system for VC based on comparisons with conventional strain gauge plethysmography (SPG). We c...

Because clinical signs and symptoms are unreliable the diagnosis of deep vein thrombosis (DVT) should be objectified. Advantages and disadvantages of contrast venography, plethysmography, ultrasound techniques, fibrinogen leg scanning, computer-assisted tomography, magnetic resonance imaging and blood tests are discussed. In patients with a first event of suspected DVT non-invasive methods like...

Aim: The aim of this paper is to present a novel approach for the monitoring respiratory diseases based on combined study heart rate, rate and Pulse Oximetry (SpO2). Introduction: Since start COVID-19 pandemic, have increased its worldwide prevalence dramatically. Added impact pandemic already existing situation growing such as bronchial asthma Chronic Obstructive Pulmonary Disease (COPD). On o...

A randomized, prospective clinical trial of 70 patients undergoing craniotomy was performed to compare and evaluate two forms of mechanical prophylaxis of deep vein thrombosis. Thirty-eight patients received antiembolism stockings, whereas 32 patients received external pneumatic compression. Prophylaxis was begun preoperatively and continued intraoperatively and post-operatively until the patie...

Discrepancies in the assessment of thoracoabdominal asynchrony are observed depending on the choice of respiratory movement sensors. We test the hypothesis that these discrepancies are due to a different dependence of the sensors on cross-sectional perimeter and area variations of the chest wall. First, we study the phase shift between perimeter and area (Phi(PA)) for an elliptical model, which...

To the Editor: Although the statement “Unfortunately, as it is not possible to obtain accurate quantitative data from humans, we have to rely on results extrapolated from animal studies, mainly dogs and cats” (1) was made in the context of venoconstrictor contributions to cardiac filling, its unqualified nature encourages comment. As Rowell (2) properly points out, both quantitative and accurat...

We investigate the timing of pre-answer inbreaths in order to shed light on the time course of response planning and execution in conversational turn-taking. Using acoustic and inductive plethysmography recordings of seven dyadic conversations in Dutch, we show that pre-answer inbreaths in conversation typically begin briefly after the end of questions. We also show that the presence of a pre-a...

Pathophysiological considerations predict that exercise blood flows at comparable work loads must always be reduced in claudicants in comparison to normal subjects. The present study verified that the exercise blood flow determined by 133xenon clearance measurements in the gastrocnemius muscle in claudicants and in a control group differed widely. As expected, a statistically significant correl...

A previous study using spirometric methods demonstrated that 42% of subjects with tetraplegia experienced significant bronchodilation following inhalation of metaproterenol sulfate (MS). Comparative studies involving subjects with paraplegia were not performed and none has been performed in this population using body plethysmography, a more sensitive method used to assess airway responsiveness....