A New Pendant Oxygen-Conserving Cannula Which Allows Pursed Lips Breathing

Long-Term Oxygen Therapy in Patients with Chronic Obstructive Pulmonary Disease

“…is effective both at rest and during exercise. [61][62][63] Soffer and associates 61 assessed SaO 2 by ear oximetry in 13 patients with COPD using reservoir cannula and standard nasal cannula over a range of oxygen flows from 0.5 to 4.0 liters/min. Pooled results from these patients demonstrated that a mean flow of 1.3 liter/min was required to attain a resting SaO 2 of 90% using the standard cannula but only 0.5 liter/min was needed with the nasal reservoir cannula (Fig.…”

“…A newer pendant conserver that does not require nasal exhalation has been designed to maintain oxygenation in the presence of pursed lip breathing. 63 Reservoir conservers are inexpensive, simple devices with no mechanical skills required of the patient who use them. However, patients often dislike them because they are more unsightly than standard nasal prongs, and this may impair optimal patient compliance.…”

Nonexercise Aspects of Pulmonary Rehabilitation

“…[201][202][203][204] A more efficient Pendant reservoir cannula that allows pursed-lip breathing has been described. 205 The combination of the oxygen-conserving mechanism of this new Pendant, combined with the improvement in oxygenation achieved by pursed-lip breathing, has been reported to increase the efficacy of oxygenation to nearly 7:1 compared with continuous flow nasal oxygen. 205 The electronic-demand oxygen-delivery systems sense the beginning of inhalation and quickly deliver an oxygen bolus.…”

“…205 The combination of the oxygen-conserving mechanism of this new Pendant, combined with the improvement in oxygenation achieved by pursed-lip breathing, has been reported to increase the efficacy of oxygenation to nearly 7:1 compared with continuous flow nasal oxygen. 205 The electronic-demand oxygen-delivery systems sense the beginning of inhalation and quickly deliver an oxygen bolus. [206][207][208][209] The goal with these devices is to deliver oxygen during the early part of inhalation while avoiding delivery during dead space inhalation and exhalation.…”

Benefits of an Oxygen Reservoir Cannula versus a Conventional Nasal Cannula during Exercise in Hypoxemic COPD Patients: A Crossover Trial

“…Thus patients' oxygenation may be improved [10] and/or O 2 flow rates can be decreased without compromising the level of oxygenation [11]. Up to now, most studies have investigated the effects of the initial, less-sophisticated version of the Oxymizer; in the late 1980s, they were limited by small sample sizes and/or examined patients' oxygenation only at rest [11,12,13,14,15,16]. We aimed to investigate the potential benefits of the advanced Oxymizer in comparison to a CNC during exercise in an adequately powered sample size of hypoxemic patients with COPD.…”