The monitoring of human breathing activity during a long period has multiple fundamental applications in medicine. In breathing sleep disorders such as apnea, the diagnosis is based on events during which the person stops breathing for several periods during sleep. In polysomnography, the standard for sleep disordered breathing analysis, chest movement and airflow are used to monitor the respir...

In this work, a seismocardiogram (SCG) based breathing-state measuring method is proposed for m-health applications. The aim of the framework to assess human respiratory system by identifying degree-of-breathings, such as breathlessness, normal breathing, and long labored breathing. For this, it needed measure cardiac-induced chest-wall vibrations, reflected in SCG signal. Orthogonal subspace p...

Noninvasive studies of the central respiratory control are key importance to understanding physiopathology apneas and periodic breathing. The study brainstem cortical-subcortical centers may be achieved by using functional magnetic resonance imaging (fMRI) during gas challenges (hypercapnia). Nonetheless, disentangling specific from non-specific effects hypercapnia in fMRI is a major methodolog...

We establish a general correspondence between two classes of statistical functions: AliSilvey distances (also known as f -divergences) and surrogate loss functions. Ali-Silvey distances play an important role in signal processing and information theory, for instance as error exponents in hypothesis testing problems. Surrogate loss functions (e.g., hinge loss, exponential loss) are the basis of ...

Digitally presenting physiological signals as biofeedback to users raises awareness of both body and mind. This paper describes the effectiveness of conveying a physiological signal often overlooked for communication: breathing. We present the design and development of digital breathing patterns and their evaluation along three output modalities: visual, audio, and haptic. We also present Breez...

In this paper, we show the correspondence between distance measures and surrogate loss functions in the context of decentralized binary hypothesis testing. This correspondence helps explicate the use of various distance measures in signal processing and quantization theory, as well as explain the behavior of surrogate loss functions often used in machine learning and statistics. We then develop...

Background: The practice of surrogacy is one of the most controversial procedures in infertility treatment. Despite increasing of using this technology in Iran, there are few practical data about surrogacy.There isn't any study assessing experiences of commissioning mothers about surrogate mother selection. Aim: The purpose of this study was exploring of commissioning mothers' experiences in se...

New ventilation modes are introduced as answers to current clinical conundrums but also as marketing tools. Rarely is a mode introduced with sound evidence from bench, animal, and patient testing. The industry cannot support the extensive testing required to demonstrate the superiority of a new mode or technique. Instead, clinicians often rely on their own experience and the results of small ob...

Breathing circuit filters (BCFs) are used in respiratory and critical-care settings for humidification of air and to limit transmission of respiratory pathogens. Three types of BCFs (Pall BB 25A, BB 100, and HME 15-22) were evaluated (in triplicate) for removal of Mycobacterium species. Filters were challenged with aerosolized Mycobacterium bovis (a surrogate for Mycobacterium tuberculosis), at...

Thoracic impedance is modulated by events within the respiratory cycle, which represents a source of "noise" in impedance cardiography. Respiration itself, however, is a physiological rhythm of interest to psychophysiologists. We report here methods and validation for deriving impedance pneumographic measures of respiration from impedance cardiography signals, based on standard tetrapolar band ...