Biomaterial Database

[The characteristics of the effect of different shapes of the gas flow rate curves during artificial pulmonary ventilation]. 1996

Iu S Gal'perin, and V L Kassil'

Five curves reflecting the rate of gas flow into the lungs during artificial ventilation of the lungs (AVL) are compared. The estimations demonstrate that the optimal distribution of gas in the lungs is attained at the peak of the rate at the beginning and during the first third of inhalation phase. At a constant flow rate the increase of the volume is constant, at maximal flow rate at the beginning and during the first third of inhalation the highest increase of the volume is observed during the first third of inhalation, at sinusoidal and increasing flow it is observed during the second third of inhalation. The maximal peak pressure in the airways was observed with the flow increasing, but the mean pressure associated with the curve of this shape was the lowest. The mean pressure is the highest at decreasing flow and at maximal flow during the first third of inhalation.

UI	MeSH Term	Description	Entries
D008449	Maximal Expiratory Flow-Volume Curves	Curves depicting MAXIMAL EXPIRATORY FLOW RATE, in liters/second, versus lung inflation, in liters or percentage of lung capacity, during a FORCED VITAL CAPACITY determination. Common abbreviation is MEFV.	Maximal Expiratory Flow Volume Curves
D012121	Respiration, Artificial	Any method of artificial breathing that employs mechanical or non-mechanical means to force the air into and out of the lungs. Artificial respiration or ventilation is used in individuals who have stopped breathing or have RESPIRATORY INSUFFICIENCY to increase their intake of oxygen (O2) and excretion of carbon dioxide (CO2).	Ventilation, Mechanical,Mechanical Ventilation,Artificial Respiration,Artificial Respirations,Mechanical Ventilations,Respirations, Artificial,Ventilations, Mechanical
D012123	Pulmonary Ventilation	The total volume of gas inspired or expired per unit of time, usually measured in liters per minute.	Respiratory Airflow,Ventilation Tests,Ventilation, Pulmonary,Expiratory Airflow,Airflow, Expiratory,Airflow, Respiratory,Test, Ventilation,Tests, Ventilation,Ventilation Test
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000403	Airway Resistance	Physiologically, the opposition to flow of air caused by the forces of friction. As a part of pulmonary function testing, it is the ratio of driving pressure to the rate of air flow.	Airway Resistances,Resistance, Airway,Resistances, Airway