Physiological Effects of Positive Pressure Breathing with Pure Oxygen and a Low Oxygen Gas Mixture

2015 ◽  
Vol 86 (1) ◽  
pp. 15-20
Author(s):  
Xiaopeng Liu ◽  
Huajun Xiao ◽  
Weiru Shi ◽  
Dongqing Wen ◽  
Lihua Yu ◽  
...  
Keyword(s):  
Pure Oxygen ◽  
Positive Pressure ◽  
Gas Mixture ◽  
Physiological Effects ◽  
Low Oxygen ◽  
Oxygen Gas

THERMOCHEMICAL BEHAVIOR AND HEAT TRANSFER IN HYPERSONIC THERMAL BOUNDARY LAYER WITH HIGH-ENTHALPY DISSOCIATED CARBON-OXYGEN GAS MIXTURE

2018 ◽  
Author(s):  
Xiaofeng Yang ◽  
Yewei Gui ◽  
Wei Tang ◽  
Yanxia Du ◽  
Guangming Xiao ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Boundary Layer ◽  
Thermal Boundary Layer ◽  
Gas Mixture ◽  
High Enthalpy ◽  
Oxygen Gas

Preparation of hydrophobic flat sheet membranes from PVDF-HFP copolymer for enhancing the oxygen permeance in nitrogen/oxygen gas mixture

2020 ◽  
Vol 28 (6) ◽  
pp. 1566-1581
Author(s):  
Bahador Akbari ◽  
Asghar Lashanizadegan ◽  
Parviz Darvishi ◽  
Abdolrasoul Pouranfard
Keyword(s):  
Gas Mixture ◽  
Flat Sheet ◽  
Oxygen Gas

Respiratory drugs

2019 ◽  
pp. 167-176
Author(s):  
Carl Waldmann ◽  
Andrew Rhodes ◽  
Neil Soni ◽  
Jonathan Handy
Keyword(s):  
Nitric Oxide ◽  
Oxygen Therapy ◽  
Patient Monitoring ◽  
Face Mask ◽  
Intermittent Positive Pressure Ventilation ◽  
Inhaled Nitric Oxide ◽  
Positive Pressure ◽  
Anticholinergic Agents ◽  
Oxygen Gas ◽  
Respiratory Drugs

This chapter discusses respiratory drugs and includes discussion on bronchodilators (describing β‎2-agonists, anticholinergic agents, and xanthine derivatives), nitric oxide (history, biochemistry, clinical use of inhaled nitric oxide, administration of inhaled nitric oxide, adverse effects of inhaled nitric oxide, and adjunctive therapies), mucolytics (properties of mucus, types of mucolytics, clinical applications, and side-effects), and helium–oxygen gas mixtures (including nomenclature, rationale, indications, expected effects, presentation, face mask administration, nebulization, patient monitoring during therapy, stopping helium–oxygen therapy, indications for helium–oxygen mask ventilation, indications for helium–oxygen intermittent positive pressure ventilation (IPPV) via endotracheal or tracheostomy tube, patient monitoring during IPPV therapy, stopping helium–oxygen therapy, and published trials).

Microvascular hemodynamics in the sickle red blood cell perfused isolated rat lung

1993 ◽  
Vol 264 (2) ◽  
pp. H484-H489 ◽  
Author(s):  
J. Haynes ◽  
A. E. Taylor ◽  
D. Dixon ◽  
N. Voelkel
Keyword(s):  
Blood Cell ◽  
Red Blood Cell ◽  
Pressor Response ◽  
Hypoxic Pulmonary Vasoconstriction ◽  
Weight Ratio ◽  
Gas Mixture ◽  
Low Oxygen ◽  
Lung Water ◽  
Lung Weight ◽  
Normal Human

In this study the effects of alveolar hypoxia on pulmonary microvascular hemodynamics in sickle red blood cell (HbSS-RBC) perfused rat lungs were studied under conditions of high and low oxygen tensions and compared with lung perfused with rat (HbRat) and normal human (HbAA) RBC controls. Independent of the RBC suspension (hematocrit 5%) used, ventilation with the room air gas mixture did not result in any significant differences in the pulmonary arterial pressure (Ppa), capillary pressure (Ppc), total pulmonary vascular resistance (RT), or angiotensin II pressor response. Ventilation of HbSS-RBC perfused lungs with a hypoxic gas mixture significantly increased the Ppa, Ppc, and RT above that which was seen in HbRat and HbAA controls. The increase in RT occurred mainly in the pulmonary artery independent of RBC suspension. In addition, no significant accumulation of lung water occurred in HbSS-RBC perfused lungs compared with HbRat and HbAA controls, as indicated by the change in capillary filtration coefficient and wet-to-dry lung weight ratio. In conclusion, deoxygenation of the HbSS-RBC and hypoxic pulmonary vasoconstriction is additive in altering pulmonary microvascular hemodynamics.

Effects of Aluminum Implantation on the Oxidation Behavior of Silicon Nitride in a Sodium Nitrate-Oxygen Gas Mixture

1996 ◽  
Vol 438 ◽  
Author(s):  
Y. Cheong ◽  
H. Du ◽  
S. P. Withrow
Keyword(s):  
Sodium Nitrate ◽  
Marked Improvement ◽  
Oxidation Behavior ◽  
Morphological Characteristics ◽  
Aluminum Concentration ◽  
Gas Mixture ◽  
Aluminum Implantation ◽  
Oxygen Gas ◽  
Si3n4 Ceramics

AbstractThe role of aluminum in negating the adverse effect of alkali species on the oxidation resistance of Si3N4 ceramics was investigated by exposing unimplanted and aluminum-implanted (1 and 5 at.%) Si3N4 samples to a sodium nitrate (95 ppm)-dry oxygen gas mixture at 1. atm and at 900°1100°C. Oxidation of unimplanted Si3N4 was rapid and linear with an activation energy of 57 kJ/mol. In contrast, samples implanted with aluminum exhibited a considerably reduced oxide growth which was parabolic in nature with activation energies of 103–112 kJ/mol. The morphological characteristics of the oxide layer also showed marked improvement as the aluminum concentration increased.

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