Performance of an oxygen delivery device for weaning potentially infectious critically ill patients*

So, Cheolhwan; Gomersall, Charles D.; Chui, Po Tong; Chan, Matthew T. V.

doi:10.1111/j.1365-2044.2004.03802.x

Cited by 12 publications

(6 citation statements)

References 18 publications

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“…As a result, there may have been relatively little mixing of fresh and expired gases within the facemask (and the oral cavity). This finding is consistent with the findings of a previous study .…”

Section: Discussionsupporting

confidence: 94%

Performance of a new oxygen delivery device for potentially infectious critically ill patients

Yip

Kwok

Gomersall³

2013

Anaesthesia

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Summary In patients with highly contagious diseases that are spread by respiratory droplets or air‐borne particles, the use of high‐flow oxygen may carry a significant risk of nosocomial transmission. We tested a new oxygen delivery device designed to address these problems by simulating 108 patients with sepsis and respiratory failure. The device being tested consisted of an airtight mask, a bacterial and viral filter, a T‐shaped reservoir (50 and 100 ml) and oxygen delivery tubing connected directly to the mask. When tested with a 50‐ml reservoir, a high fractional oxygen concentration was achieved: mean (SD) 0.83 (0.11) at a flow of 15 l.min−1 oxygen. The 50‐ml reservoir, when compared with the 100‐ml reservoir, was associated with reduced carbon dioxide rebreathing (mean (SD) inspired fractional carbon dioxide concentration 2.5 (1.0) vs 3.0 (1.1), respectively, p = 0.009) and reduced inspiratory resistive work of breathing (mean (SD) 1.0 (0.6) J.l−1 vs 1.2 (0.5) J.l−1, respectively, p = 0.028). However, rebreathing and work of breathing were relatively high if a high respiratory rate was simulated. We conclude that the novel oxygen device we describe, equipped with the 50‐ml T‐shaped reservoir, is suitable for potentially infectious patients with type‐1 respiratory failure but without marked tachypnoea.

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Section: Discussionsupporting

confidence: 94%

Performance of a new oxygen delivery device for potentially infectious critically ill patients

Yip

Kwok

Gomersall³

2013

Anaesthesia

Self Cite

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“…The lung compliance and airway resistance also responds in a realistic manner to relevant respiratory challenges. In addition, the HPS produces an airflow pattern that is close to the in vivo situation and has been applied in previous studies [15][16][17][18][19] to simulate human respiration.…”

Section: Nppv and Lung Modelmentioning

confidence: 99%

Exhaled Air Dispersion Distances During Noninvasive Ventilation via Different Respironics Face Masks

Hui

Chow

et al. 2009

Chest

130

164

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“…Few studies have tried to evaluate delivery system performance in the adverse circumstances in which the systems are commonly used [19–21]. Practical difficulties include the instantaneous and simultaneous measurement of F i o 2 and gas flow.…”

Section: Factors That Influence the Fio2 Delivered To A Patient By Omentioning

confidence: 99%

Performance of six types of oxygen delivery devices at varying respiratory rates*

Wagstaff¹,

Soni

2007

Anaesthesia

142

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SummaryThe administration of a known concentration of oxygen is an important part of routine care of the sick patient. Many devices are currently available. The actual concentration of oxygen that can be delivered by these devices can be affected by several factors, both from the patient as well as the device itself. Measuring the F i O 2 delivered to the lungs in vivo can be both difficult and potentially uncomfortable for the subjects. We constructed a model using a resuscitation manikin, a ventilator and a set of bellows to simulate ventilation. With this model we tested a series of devices -variable performance, fixed performance and high flow -at two fixed tidal volumes. The respiratory rate was increased and its effect on the oxygen concentration assessed. Variable performance systems such as the Hudson mask deliver a significantly reduced oxygen concentration at high respiratory rates. Fixed performance systems delivering 24-40% oxygen deliver appropriate oxygen concentrations across the range of respiratory rates, whereas those delivering 60% show a reduction in performance. High flow systems show no failure of performance at increased respiratory rates.

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Performance of an oxygen delivery device for weaning potentially infectious critically ill patients*

Cited by 12 publications

References 18 publications

Performance of a new oxygen delivery device for potentially infectious critically ill patients

Performance of a new oxygen delivery device for potentially infectious critically ill patients

Exhaled Air Dispersion Distances During Noninvasive Ventilation via Different Respironics Face Masks

Performance of six types of oxygen delivery devices at varying respiratory rates*

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