scholarly journals Peripheral oxygen saturation to inspiratory oxygen fraction ratio-based identification of critically ill coronavirus disease patients for early therapeutic interventions

2021 ◽  
Author(s):  
Masaru Shimizu ◽  
Satoru Hashimoto
Keyword(s):  
Oxygen Saturation ◽  
Critically Ill ◽  
Therapeutic Interventions ◽  
Peripheral Oxygen Saturation ◽  
Oxygen Fraction ◽  
Inspiratory Oxygen

Non-invasive ventilation improves peripheral oxygen saturation and reduces fatigability of quadriceps in patients with COPD

Respirology ◽  
2009 ◽  
Vol 14 (4) ◽  
pp. 537-544 ◽  
Author(s):  
Audrey BORGHI-SILVA ◽  
Luciana DI THOMMAZO ◽  
Camila B.F. PANTONI ◽  
Renata G. MENDES ◽  
Tania DE FÁTIMA SALVINI ◽  
...  
Keyword(s):  
Oxygen Saturation ◽  
Invasive Ventilation ◽  
Peripheral Oxygen Saturation ◽  
Non Invasive ◽  
Non Invasive Ventilation

scholarly journals Effect of a Taped Filter Mask on Perceived Breathlessness, Heart Rate, Lactate and Oxygen Saturation During a Graded Exercise Test

2021 ◽  
Author(s):  
Hoi Lam Ng ◽  
Johannes Trefz ◽  
Martin Schönfelder ◽  
Henning Wackerhage
Keyword(s):  
Heart Rate ◽  
Oxygen Saturation ◽  
Exercise Test ◽  
Repeated Measures ◽  
Face Mask ◽  
Cycle Ergometer ◽  
Peripheral Oxygen Saturation ◽  
Graded Exercise Test ◽  
Graded Exercise ◽  
The Face

Abstract Background: Face masks are an effective, non-pharmacological strategy to reduce the transmission of Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) and other pathogens. However, it is a challenge to keep masks sealed during exercise, as ventilation can increase from 5-10 L/min at rest to up to 200 L/min so that masks may be blown away from the face. To reduce leakage e.g. during exercise, a face mask was developed that is taped onto the face. The aim of this study was to investigate during a graded cycle ergometry test the effect of a taped mask on the perception of breathlessness, heart rate, lactate, and oxygen saturation when compared to a surgical mask and no mask.Methods: Four trained and healthy males and females each (n=8 in total) performed incremental cycle ergometer tests until voluntary exhaustion under three conditions: (1) No mask/control, (2) surgical mask or (3) taped mask. During these tests, we measured perception of breathlessness, heart rate, the concentration of blood lactate and peripheral oxygen saturation and analysed the resultant data with one or two-way repeated measures ANOVAs. We also used a questionnaire to evaluate mask comfort and analysed the data with paired t-tests. Results: When compared to wearing no mask, a taped face mask significantly reduces the maximal workload in a graded exercise test by 12±6% (p=0.001). Moreover, with a taped face mask, subjects perceive severe breathlessness at 12±9% lower workload (p=0.012) and oxygen saturation at 65% of the maximal workload is 1.5% lower (p=0.018) when compared to wearing no mask. Heart rate and the concentration of lactate were not significantly different at any workload. When compared to wearing a surgical mask, wearing a taped face mask has a significantly better wearing comfort (p=0.038), feels better on the skin (p=0.004), there is a lower sensation of moisture (p=0.026) and wearers perceive that less heat is generated (p=0.021). We found no sex/gender differences for any parameters. Conclusions: A taped mask is well tolerated during light and moderate exercise intensity but reduces maximal exercise capacity.

scholarly journals Higher versus lower inspiratory oxygen fraction or targets of arterial oxygenation for adult intensive care patients

2017 ◽  
Author(s):  
Marija Barbateskovic ◽  
Olav Lilleholt L Schjørring ◽  
Janus C Jakobsen ◽  
Christian S Meyhoff ◽  
Rikke M Dahl ◽  
...  
Keyword(s):  
Intensive Care ◽  
Arterial Oxygenation ◽  
Intensive Care Patients ◽  
Oxygen Fraction ◽  
Inspiratory Oxygen

Low sodium intake does not impair renal compensation of hypoxia-induced respiratory alkalosis

2002 ◽  
Vol 92 (5) ◽  
pp. 2097-2104 ◽  
Author(s):  
Claudia Höhne ◽  
Willehad Boemke ◽  
Nora Schleyer ◽  
Roland C. Francis ◽  
Martin O. Krebs ◽  
...  
Keyword(s):  
Sodium Excretion ◽  
Sodium Intake ◽  
Minute Ventilation ◽  
Acute Hypoxia ◽  
Respiratory Alkalosis ◽  
High Sodium ◽  
Low Sodium ◽  
Oxygen Fraction ◽  
Arterial Blood ◽  
Inspiratory Oxygen

Acute hypoxia causes hyperventilation and respiratory alkalosis, often combined with increased diuresis and sodium, potassium, and bicarbonate excretion. With a low sodium intake, the excretion of the anion bicarbonate may be limited by the lower excretion rate of the cation sodium through activated sodium-retaining mechanisms. This study investigates whether the short-term renal compensation of hypoxia-induced respiratory alkalosis is impaired by a low sodium intake. Nine conscious, tracheotomized dogs were studied twice either on a low-sodium (LS = 0.5 mmol sodium · kg body wt−1 · day−1) or high-sodium (HS = 7.5 mmol sodium · kg body wt−1 · day−1) diet. The dogs breathed spontaneously via a ventilator circuit during the experiments: first hour, normoxia (inspiratory oxygen fraction = 0.21); second to fourth hour, hypoxia (inspiratory oxygen fraction = 0.1). During hypoxia (arterial Po 2 34.4 ± 2.1 Torr), plasma pH increased from 7.37 ± 0.01 to 7.48 ± 0.01 ( P < 0.05) because of hyperventilation (arterial Pco 2 25.6 ± 2.4 Torr). Urinary pH and urinary bicarbonate excretion increased irrespective of the sodium intake. Sodium excretion increased more during HS than during LS, whereas the increase in potassium excretion was comparable in both groups. Thus the quick onset of bicarbonate excretion within the first hour of hypoxia-induced respiratory alkalosis was not impaired by a low sodium intake. The increased sodium excretion during hypoxia seems to be combined with a decrease in plasma aldosterone and angiotensin II in LS as well as in HS dogs. Other factors, e.g., increased mean arterial blood pressure, minute ventilation, and renal blood flow, may have contributed.

scholarly journals Evaluation of Knowledge of Oxygen Therapy and Reading of Flowmeter among the Health Workers in the Pediatric Unit of the Hospital Universitario San Ignacio, Bogotá, Colombia

2018 ◽  
Vol 59 (3) ◽  
pp. 1-8
Author(s):  
Elly Morros González ◽  
Diana Estrada Cano ◽  
Marcela Murillo Galvis ◽  
Jos Carlos Montes Correa ◽  
Nelcy Rodríguez Malagón ◽  
...  
Keyword(s):  
Adverse Effects ◽  
Oxygen Saturation ◽  
Oxygen Therapy ◽  
Health Workers ◽  
Supplemental Oxygen ◽  
Cross Sectional Study ◽  
Peripheral Oxygen Saturation ◽  
Cross Sectional ◽  
Fraction Of Inspired Oxygen ◽  
Supplemental Oxygen Therapy

Introduction: Supplemental oxygen is considered a pharmaceutical drug; therefore, it can produce adverse effects. Lack of consensus regarding the reading of oxygen flowmeters and the peripheral oxygen saturation (SpO2) goals can influence clinical and paraclinical decisions and hospital stay length. Objective: To assess knowledge on oxygen therapy, adverse effects, SpO2 goals and reading of oxygen flowmeters among personnel in the Pediatric Unit at Hospital Universitario San Ignacio, Bogotá, Colombia. Methodology: Cross-sectional study derived from convenience sampling through a self-applied survey between December 2016 and January 2017. The poll evaluated topics on supplemental oxygen therapy fundamentals and adverse effects, SpO2 goals and flowmeter readings through flowmeters photographs indicating a specific fraction of inspired oxygen (FiO2). Results: The response rate was 77% from 259 subjects. 22% considered that the oxygen saturation either increases or remains the same during sleep periods in children. 78% of participants knew at least one complication associated to prolonged oxygen therapy and 67% due to supplemental oxygen concentration greater than required. In neonatal population, 10% considered oxygen saturation goals equal to or greater than 96%. In the flowmeter’s reading evaluation, incorrect answers ranged from 9 to 19%. Conclusion: It is imperative to reinforce updated concepts on oxygen therapy, with emphasis in SpO2 goals, adverse effects and appropriate flowmeter’s readings through periodic educational campaigns.

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