The Oxygen Concentrations Delivered by Different Oxygen Therapy Systems

García, J. Arrazola; Gardner, Donna D.; Vines, David; Shelledy, David C.; Wettstein, Richard; Peters, Jay I.

doi:10.1378/chest.128.4_meetingabstracts.389s-b

Cited by 13 publications

(9 citation statements)

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“…Patients were randomly assigned to one of two oxygen regimes for 1 h. Patients in the high concentration group received oxygen at a flow rate of 8 l/min via a medium concentration mask (Hudson RCI, Durham, North Carolina, USA) which delivers an Fi o 2 of between 0.4 and 0.78 25 26. Patients in the titrated group received oxygen only if their saturation was ≤92% on room air, with oxygen titrated as required at 5 min intervals, to achieve an oxygen saturation of 93–95% according to the protocol outlined in the online supplement Table S1.…”

Section: Methodsmentioning

confidence: 99%

Randomised controlled trial of high concentration versus titrated oxygen therapy in severe exacerbations of asthma

Perrin

Wijesinghe

Healy

et al. 2011

Thorax

113

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BackgroundThe effect on PaCO 2 of high concentration oxygen therapy when administered to patients with severe exacerbations of asthma is uncertain. Methods 106 patients with severe exacerbations of asthma presenting to the Emergency Department were randomised to high concentration oxygen (8 l/min via medium concentration mask) or titrated oxygen (to achieve oxygen saturations between 93% and 95%) for 60 min. Patients with chronic obstructive pulmonary disease or disorders associated with hypercapnic respiratory failure were excluded. The transcutaneous partial pressure of carbon dioxide (PtCO 2 ) was measured at 0, 20, 40 and 60 min. The primary outcome variable was the proportion of patients with a rise in PtCO 2 $4 mm Hg at 60 min. Results The proportion of patients with a rise in PtCO 2 $4 mm Hg at 60 min was significantly higher in the high concentration oxygen group, 22/50 (44%) vs 10/53 (19%), RR 2.3 (95% CI 1.2 to 4.4, p<0.006). The high concentration group had a higher proportion of patients with a rise in PtCO 2 $8 mm Hg, 11/50 (22%) vs 3/53 (6%), RR 3.9 (95% CI 1.2 to 13

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Section: Methodsmentioning

confidence: 99%

Randomised controlled trial of high concentration versus titrated oxygen therapy in severe exacerbations of asthma

Perrin

Wijesinghe

Healy

et al. 2011

Thorax

113

View full text Add to dashboard Cite

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“… For most patients standard nasal cannulae are the preferred method of oxygen delivery, with the flow rate varied to achieve the target oxygen saturation. [Grade D] The FiO 2 levels delivered by the different delivery systems may vary considerably between patients and be influenced by a number of factors, including respiratory rate and whether the patient's mouth is open or closed . Approximate FiO 2 values delivered by different delivery systems are: Standard nasal cannulae can deliver an FiO 2 of 0.24–0.35 at an oxygen flow of 1–4 L/min Venturi masks can deliver an FiO 2 of 0.24–0.60 High flow nasal cannulae can deliver an FiO 2 of 0.21–0.80 A simple face mask can deliver an FiO 2 of 0.35–0.60 at an oxygen flow of 5–10 L/min A 100% non‐rebreather reservoir mask at 15 L/min can deliver an FiO 2 of >0.60 For simple face masks, flow rates of <5 L/min should be avoided due to the potential risk of carbon dioxide rebreathing .…”

Section: Recommendationsmentioning

confidence: 99%

ThoracicSociety ofAustralia andNewZealand oxygen guidelines for acute oxygen use in adults: ‘Swimming between the flags’

et al. 2015

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The purpose of the Thoracic Society of Australia and New Zealand guidelines is to provide simple, practical evidence-based recommendations for the acute use of oxygen in adults in clinical practice. The intended users are all health professionals responsible for the administration and/or monitoring of oxygen therapy in the management of acute medical patients in the community and hospital settings (excluding perioperative and intensive care patients), those responsible for the training of such health professionals, and both public and private health care organizations that deliver oxygen therapy.

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“…Supplementary oxygen delivered by nasal tips or mask with a no higher flux of 5 L/min may as well increase oxygen concentration in up to 28‐44%. Oxygen mask with reservoir in a flux of 15 L/min may increase plasma oxygen concentration to an even higher level of 60%‐80% being well tolerated 33 …”

Section: Resultsmentioning

confidence: 99%

“…/min may as well increase oxygen concentration in up to 28-44%. Oxygen mask with reservoir in a flux of 15 L/min may increase plasma oxygen concentration to an even higher level of 60%-80% being well tolerated 33. 4 | D ISCUSS I ONSudden visual loss following dermal filler injection is an uncommon yet devastating complication with a poor visual outcome in most cases.…”

mentioning

confidence: 99%

The M.A.STE.R.S algorithm for acute visual loss management after facial filler injection

Graue¹,

Araujo²,

Palazuelos³

et al. 2020

J of Cosmetic Dermatology

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Objective To propose an algorithm of treatment for sudden visual loss following filler injections and perform an English‐written literature search for assignment of evidence level and grade recommendation. Methods Algorithm of treatment includes ocular physical Maneuvers, hyAluronidase administration, intravenous STEroids, intraocular pressure Reduction, and Supplemental Oxygen (M.A.STE .R.S) based on previous acute management reports. Special consideration for algorithm buildup was made for ophthalmic diseases that share physiopathological features such as central retinal artery occlusion, systemic vasculitis affecting vision, and acute glaucoma. Finally, a systematic cross‐review of the reported cases with visual loss was done to identify the level of evidence and grant a recommendation grade. Results A search through PubMed and Medscape databases for English‐written scientific papers using the terms facial filler, retinal artery occlusion, management, treatment, complications, and adverse events quoted a total of 46 papers (190 cases) which were then analyzed. A high variability on management for treatment of sudden visual loss after facial filler injections was observed. This was attributed partially to the great diversity of medical specialists performing cosmetic facial procedures such as dermatologists, plastic surgeons, esthetic doctors and ophthalmologists, and the lack of high evidence level studies. Conclusions The proposed algorithm provides an initial guideline based on prior literature reports and physiopathology involving facial filler injection complications. Analysis identified 22 successfully treated cases with vision recovery (11.57%). Ocular physical maneuvers had the best evidence‐based level and grade recommendation (A) for the management of acute vision loss secondary to facial filler injections.

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The Oxygen Concentrations Delivered by Different Oxygen Therapy Systems

Cited by 13 publications

References 0 publications

Randomised controlled trial of high concentration versus titrated oxygen therapy in severe exacerbations of asthma

Randomised controlled trial of high concentration versus titrated oxygen therapy in severe exacerbations of asthma

ThoracicSociety ofAustralia andNewZealand oxygen guidelines for acute oxygen use in adults: ‘Swimming between the flags’

The M.A.STE.R.S algorithm for acute visual loss management after facial filler injection

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