Wiener klinische Wochenschrift
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Wien. Klin. Wochenschr. · May 1990
Randomized Controlled Trial Clinical Trial[Comparison of an oxygen-conserving module "Oxytron" and the reservoir cannula "Oxymizer Pendant" with continuous oxygen administration via nasal prong in hypoxemic patients].
High costs involved in administering continuous long-term oxygen therapy to patients with chronic lung diseases and limited portability of oxygen sources stimulated research into and development of oxygen conserving devices. Oxytron (Weinmann, Hamburg) is a new electronic demand oxygen delivery system which limits oxygen flow to the early phase of inspiration. The reservoir cannula Oxymizer Pendant (Chad-Therapeutics Inc.) is a nasal prong system incorporating a pendant reservoir which stores oxygen during expiration and delivers it as a bolus at the onset of inspiration. ⋯ With the reservoir cannula oxygen saving was most evident at low oxygen flows: 29.3, 19.4 and 4.7% less oxygen was required than with continuous flow at 2, 3 and 41/min. Individual patient acceptance of various drug delivery systems and response to therapy should be considered when prescribing home oxygen therapy. The use of oxygen saving techniques could result in a substantial cost saving and greater mobility may help to improve compliance in patients requiring continuous oxygen therapy.