Variability of inspired oxygen concentration with nasal cannulas.
نویسندگان
چکیده
منابع مشابه
Variability of inspired oxygen concentration with nasal cannulas.
BACKGROUND The likely values of inspired oxygen concentration (FIO2) of patients with chronic obstructive pulmonary disease breathing via nasal cannulas have not been assessed previously. METHODS Seven patients with chronic obstructive lung disease and seven healthy subjects were studied while breathing oxygen via nasal cannulas or fixed performance (Venturi) or uncontrolled (MC) oxygen masks...
متن کاملDelivered oxygen concentrations using low-flow and high-flow nasal cannulas.
INTRODUCTION Nasal cannulas are commonly used to deliver oxygen in acute and chronic care settings; however, there are few data available on delivered fraction of inspired oxygen (F(IO(2))). The purposes of this study were to determine the delivered F(IO(2)) on human subjects using low-flow and high-flow nasal cannulas, and to determine the effects of mouth-closed and mouth-open breathing on F(...
متن کاملAutomated closed loop control of inspired oxygen concentration.
Oxygen therapy is extensively used in premature infants and adults with respiratory insufficiency. In the premature infant the goal during manual control of the F(IO(2)) is to maintain adequate oxygenation and to minimize the exposure to hypoxemia, hyperoxemia, and oxygen. However, this is frequently not achieved during routine care, which increases the risks of associated side effects affectin...
متن کاملMaternal inspired oxygen concentration and fetal oxygenation during caesarean section.
This study was designed to determine whether fetal arterial and venous PO2 could be increased by increasing maternal FIO2 in the period between hysterotomy and birth. Two groups of ten patients were studied. All were anaesthetised with the same technique except for the FIO2 after hysterotomy. One group inspired 50% oxygen and the second group inspired 100% oxygen. Although the maternal arterial...
متن کاملHumidification of inspired oxygen is increased with pre-nasal cannula, compared to intranasal cannula.
BACKGROUND Oxygen therapy is usually combined with a humidification device, to prevent mucosal dryness. Depending on the cannula design, oxygen can be administered pre- or intra-nasally (administration of oxygen in front of the nasal ostia vs cannula system inside the nasal vestibulum). The impact of cannula design on intra-nasal humidity, however, has not been investigated to date. OBJECTIVE...
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ژورنال
عنوان ژورنال: Thorax
سال: 1992
ISSN: 0040-6376
DOI: 10.1136/thx.47.8.609