Synchronized oxygen delivery and its optimization method: A bench study

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

“…The SDOD device supplied oxygen by the first or second mode using sigmoid time-dependent oxygen profiles in this study. The actual flow of discharged oxygen was recorded to calculate the actual SR. 7 Oxygen flow, when subjects were put on CFO, was set at the rate prescribed for individual subjects. Fig.…”

“…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.…”