2011
DOI: 10.1542/peds.2010-3745
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Accuracy of a Novel System for Oxygen Delivery to Small Children

Abstract: Entrainment devices can deliver accurate oxygen concentrations at low flow rates if used with low resistance delivery systems; however, entrainment devices are not suitable for use with high resistance delivery systems such as a standard nasal cannula.

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Cited by 8 publications
(5 citation statements)
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“…A compressed oxygen source was available in every unit, but many units did not have the capacity to blend oxygen/air because of lack of compressed medical air, precluding the use of traditional blenders. Innovative blenders of oxygen/ air can be effective without the need of compressed medical air [26,27], but some are limited due to incompatibility with nasal cannula [26] or are not yet on the market [27]. Advocacy for compressed air and oxygen sources, or instruments that can blend oxygen/air without a compressed air source, are crucial in some units in sub-Saharan Africa.…”
Section: Discussionmentioning
confidence: 99%
“…A compressed oxygen source was available in every unit, but many units did not have the capacity to blend oxygen/air because of lack of compressed medical air, precluding the use of traditional blenders. Innovative blenders of oxygen/ air can be effective without the need of compressed medical air [26,27], but some are limited due to incompatibility with nasal cannula [26] or are not yet on the market [27]. Advocacy for compressed air and oxygen sources, or instruments that can blend oxygen/air without a compressed air source, are crucial in some units in sub-Saharan Africa.…”
Section: Discussionmentioning
confidence: 99%
“…In adults, Venturi masks, which use a jet of high velocity oxygen to entrain ambient air, can be used to inexpensively mix air and oxygen. However, the air/ oxygen blenders in Venturi masks are designed exclusively for use with face masks and are incompatible with nasal cannula ( 12 ) which are the preferred method for delivering oxygen to children and infants ( 2 , 13 ). Venturi blenders on the market are inaccurate and inefficient when attached to higher resistance circuits, especially at the lower flows needed by smaller children and infants ( 12 ).…”
Section: Introductionmentioning
confidence: 99%
“…However, the air/ oxygen blenders in Venturi masks are designed exclusively for use with face masks and are incompatible with nasal cannula ( 12 ) which are the preferred method for delivering oxygen to children and infants ( 2 , 13 ). Venturi blenders on the market are inaccurate and inefficient when attached to higher resistance circuits, especially at the lower flows needed by smaller children and infants ( 12 ). There remains an unmet need for an affordable method of providing blended low flow oxygen therapy to children and infants via nasal cannula.…”
Section: Introductionmentioning
confidence: 99%
“…El estudio de Longest(Longest & et al, 2013), determinó que la cánula proporciona eficiencias de entrega a velocidades de flujo de 2-15 Lt/min en aproximadamente un 80% o más, pero en el 20% restante se han observado pérdidas, las cuales y según el estudio de Hegde & Prodhan(Hegde & Proghan, P., 2013), conducen a complicaciones por lo que recomienda usar este sistema con el mayor cuidado, debido que envía un volumen minuto mayor a lo que algunos niños requieren, causando sobredistensión alveolar y fuga de aire que conlleva a neumomediastino, neumotórax; iguales hallazgos se encuentran el estudio de García(García & et al, 2011), en donde se precisó el cambio de la cánula nasal de alto flujo por fugas excesivas.En el estudio de Coghill(Coghill & et al, 2011), se evidenció que el uso de la cánula nasal de alto flujo no resulta eficaz cuando se combina con dispositivos de arrastre de aire, especialmente los de tubo largo y estrecho, porque una gran proporción del oxígeno suministrado al dispositivo, que a veces superó el 50%, fue expulsado a través de los orificios de ventilación.Asi mismo, en el estudio de Álvarez(Álvarez & et al, 2014), se destacó que el uso de la cánula de alto flujo no debe ser considerado, hoy por hoy, como un método de administración de presión en la vía respiratoria, ni como una terapia específicamente ventilatoria entendida como la capacidad de barrer CO2, debido a que está presión es inexacta, difícil de predecir y más aún de pautar. El sistema genera algún grado de presión en la orofaringe, pero esta presión dependerá aspectos como: el flujo administrado, de si la boca está abierta o cerrada y del grado de fugas de las cánulas nasales en las narinas; por ello no se debe considerar como un sustituto de la CPAP, que es un modo de ventilación no invasiva contrastada, sino como una alternativa más en auge, que posiblemente vaya teniendo su propio campo de aplicación en neonatología.…”
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