Synchronization of Oxygen Delivery With Breathing Pattern for Enhanced Comfort: A Bench Study

Abstract

In conclusion, SDOD might provide more comfortable oxygen delivery by reducing DI, and conserves oxygen while offering an equivalent Fio2.

Leitlinie zur Langzeit-Sauerstofftherapie

“…Die Reichweite der mobilen Geräte kann hierdurch in Abhängigkeit vom Atemmuster und der benötigten Sauerstoffmenge mehr als verdoppelt werden. Durch die fehlende Füllung von Nase und Epipharynx während der Ausatmung des Patienten resultiert, wie bei allen Niedrigfluss-Sauerstoff-Systemen, eine etwas niedrigere inspiratorische Sauerstoff-Konzentration, nach einer Studie in der Größenordnung von 2 % -5 % [168]. Chen und Mitarbeiter verglichen konstante Sauerstoffflüsse mit intermittierenden Flüssen an Modellen der oberen Atemwege in Kombination mit einem Lungensimulator und fanden niedrigere inspiratorische Sauerstoff-Konzentrationen bei der gepulsten Abgabe durch tragbare Konzentratoren, in einer Größenordnung von 68 % -94 % der durch konstante Sauerstoffflüsse erzielbaren inspiratorische Sauerstoffflüsse [169].…”

A Pilot Study Comparing 2 Oxygen Delivery Methods for Patients' Comfort and Administration of Oxygen

“…SDOD was designed, delivered, and studied using a bench model previously described in other studies 6,7 ; thus, only a brief description is given here. SDOD, which uses a proportional valve to control oxygen flow, begins to supply oxygen just before inhalation in accordance with a sinusoidal discharge curve (Fig.…”

“…Moreover, SDOD has been designed to deliver oxygen by 4 delivery modes to conserve oxygen according to set SR values. 6,7 SDOD uses 4 oxygen delivery modes according to the set level of oxygen saving (Fig. 2).…”

“…2). 6,7 The first and second modes supply oxygen in a sigmoid pattern that peaks before inhalation. The third mode supplies oxygen before inhalation along a sigmoid curve that gives way to a pulsed pattern at the onset of inhalation.…”

“…6,7 SDOD offers patients a greater level of comfort by delivering oxygen in a smooth sinusoidal pattern that is synchronized to their breathing; in addition, the method permits oxygen conservation at different levels, which can be set by physicians or patients. 6,7 According to a recent study by Lee et al, 6 the majority of subjects who had no respiratory disease were more comfortable with the sinusoidal curve of SDOD than with the pulsed pattern of DOD. Nevertheless, study regarding the comfort level of patients with respiratory diseases is warranted because the comfort level of these patients might be different from that of subjects with no respiratory diseases.…”