Single Portable Pulse-dose-conserving Device vs. Combined Use of Stationary and Portable.

Oxygenation Using a Single Portable Pulse-dose-conserving Device Compared to Combined Use of Stationary and Portable Oxygen Delivery Devices.

Introduction: Portable oxygen devices simplify and facilitate patient therapy. This study was designed to compare oxygen saturation and patient satisfaction with a portable oxygen concentrator or with a combined system consisting of a fixed device with continuous flow oxygen dispensation and a portable device with pulse dispensation for ambulation. Methods: This cross-over trial assessed 25 patients with COPD (92% men; mean age 72.2 ± 7.4 years; mean FEV 34.14 ± 12.51%) at four hospitals in Madrid. All patients had previously used the combined system, consisting of a fixed oxygenation system and a portable system for ambulation, with 16 (64%) using stationary and portable concentrators and 9 (36%) using a stationary reservoir and portable liquid oxygen bag. Oxygenation settings at rest and while walking were determined at baseline. Patients were maintained on the previous combined system for one week and then switched to the portable oxygen concentrator for one week. Mean SpO2 over 24 hours was calculated by the software in the oximeter, and compliance was monitored

During the first visit, the technician installed a reservoir of liquid oxygen (Liberator 30, Caire) and a liquid Stroller oxygen pack (Caire) for patients using liquid oxygen, or a VisionAire5 (Airsep) stationary concentrator and an Inogen One G2 portable (Inogen) concentrator for patients using concentrators.

Combination system of a portable and a stationary device (reservoir of liquid oxygen "Liberator 30, Caire" and a liquid Stroller oxygen pack "Caire" for patients using previously liquid oxygen, or a VisionAire5 "Airsep" stationary concentrator and an Inogen One G2 portable "Inogen" concentrator for patients using previously concentrators)

oxygenation of patient during use of a combined system consisting of a fixed device with continuous flow oxygen dispensation and a portable device with pulse dispensation for ambulation.

Inclusion Criteria: aged 40-80 years had been diagnosed with COPD following the GOLD criteria were receiving oxygen therapy using a fixed oxygenation system and a portable system for ambulation without exacerbation during the previous month agreed to participate Exclusion Criteria: terminally ill unable to understand Spanish had high oxygen flow at rest (> 3 lpm) high respiratory frequency at rest (> 32 rpm) were not achieving adequate O2 saturation levels during titration with the portable oxygen source had previously been diagnosed with obstructive sleep apnea hypopnea syndrome (SAHS) were receiving mechanical ventilation.

Servicio de Neumología. Hospital Clínico de San Carlos. Facultad de medicina. Universidad complutense de Madrid

Yanez AM, Prat JP, Alvarez-Sala JL, Calle M, Diaz Lobato S, Garcia Gonzalez JL, Rodriguez Gonzalez-Moro JM, Galera-Martinez R, Villasante C, Ramos I, Franco-Gay M, de Lucas P. Oxygenation With a Single Portable Pulse-Dose Oxygen-Conserving Device and Combined Stationary and Portable Oxygen Delivery Devices in Subjects With COPD. Respir Care. 2015 Mar;60(3):382-7. doi: 10.4187/respcare.03470. Epub 2014 Nov 25.