1,721,152 research outputs found
La terapia ventilatoria non invasiva della sindrome della apnee ostruttive nel sonno: pressione positiva nelle vie aeree e non solo
No full text
Baseline plethysmographic signal of arterial pulse during polysomnography: a potential insight into venous return and its clinical implications
No full textPulse oximetry is based on the technique of photoplethysmography. It is known that the pulsatile arterial component can provide a range of information, such as arterial blood oxygen saturation, the response to fluid infusion, and the nature of respiratory events during sleep. Until now, little importance has been given to the venous component of the plethysmographic signal, which is non-pulsatile but subject to volumetric variations in relation to changes in endopleuric pressure. Respiratory-induced intensity variations contained in the baseline of the photoplethysmographic signal have been well documented. We hypothesize that in polysomnography, variations in the baseline of the plethysmographic signal (referred to as the BPS, baseline plethysmographic signal) reflect variations in venous return induced by respiration, and that these variations present morphological aspects that could have clinical utility in the interpretation of polysomnographic signals, particularly regarding respiratory effort associated with respiratory events, their nature (central or obstructive), and the hemodynamic alterations associated with them. This article presents a selection of polysomnographic traces and images with physiopathological considerations that support our hypothesis
Novel Wearable Device for Non-Invasive Management of Positional Sleep Apnea: A Proof-of-Concept
No full textObstructive Sleep Apnea (OSA) is a serious health condition characterized by repetitive airway collapses during sleep, which can lead to cardiovascular and metabolic complications if untreated. Positional OSA (POSA), a subtype triggered by specific sleeping positions, presents additional therapeutic challenges. This paper introduces a novel wearable device designed to treat POSA non-invasively. The system employs a microcontroller, inertial sensors, and a quiet piezoelectric pump to dynamically adjust a pillow based on the user's position. When the patient lies supine, the pillow inflates to encourage a lateral position, reducing nocturnal respiratory events. Experimental tests demonstrate the system's low latency and minimal noise levels, making it a comfortable alternative to conventional OSA treatment, but also aiming to become the first-line treatment for POSA. The proposed device offers an effective, portable, and adaptable solution for patients seeking non-intrusive treatment options for sleep apnea. Future developments include integrating remote monitoring capabilities to enhance usability and clinical effectiveness
- …
