Biomaterial Database

[Replacement of helium by argon in the measurement of the carbon monoxide diffusing capacity of the lung]. 1989

D K Yin

Carbon monoxide diffusing capacity of the lung (DLco) of 118 normal subjects and 48 patients was measured by using three different gas mixtures respectively: (1) 10% He, 0.3% CO, 21% O2 and the remainder N2; (2) 10% Ar, 0.3% CO, 21% O2 and the remainder N2; (3) 10% He, 10% Ar, 0.3% CO, 21% O2 and the remainder N2. The results were extremely close with each other, value was 0.99 (P less than 0.0005). These results indicate for the first time that the much cheaper and easy-available gas-argon can be used instead of the very expensive helium for measurement of DLco.

UI	MeSH Term	Description	Entries
D008168	Lung	Either of the pair of organs occupying the cavity of the thorax that effect the aeration of the blood.	Lungs
D008297	Male		Males
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D011653	Pulmonary Diffusing Capacity	The amount of a gas taken up, by the pulmonary capillary blood from the alveolar gas, per minute per unit of average pressure of the gradient of the gas across the BLOOD-AIR BARRIER.	Capacity, Pulmonary Diffusing,Diffusing Capacity, Pulmonary
D011656	Pulmonary Emphysema	Enlargement of air spaces distal to the TERMINAL BRONCHIOLES where gas-exchange normally takes place. This is usually due to destruction of the alveolar wall. Pulmonary emphysema can be classified by the location and distribution of the lesions.	Emphysema, Pulmonary,Centriacinar Emphysema,Centrilobular Emphysema,Emphysemas, Pulmonary,Focal Emphysema,Panacinar Emphysema,Panlobular Emphysema,Pulmonary Emphysemas,Centriacinar Emphysemas,Centrilobular Emphysemas,Emphysema, Centriacinar,Emphysema, Centrilobular,Emphysema, Focal,Emphysema, Panacinar,Emphysema, Panlobular,Emphysemas, Centriacinar,Emphysemas, Centrilobular,Emphysemas, Focal,Emphysemas, Panacinar,Emphysemas, Panlobular,Focal Emphysemas,Panacinar Emphysemas,Panlobular Emphysemas
D002248	Carbon Monoxide	Carbon monoxide (CO). A poisonous colorless, odorless, tasteless gas. It combines with hemoglobin to form carboxyhemoglobin, which has no oxygen carrying capacity. The resultant oxygen deprivation causes headache, dizziness, decreased pulse and respiratory rates, unconsciousness, and death. (From Merck Index, 11th ed)	Monoxide, Carbon
D005260	Female		Females
D006371	Helium	A noble gas with the atomic symbol He, atomic number 2, and atomic weight 4.003. It is a colorless, odorless, tasteless gas that is not combustible and does not support combustion. It was first detected in the sun and is now obtained from natural gas. Medically it is used as a diluent for other gases, being especially useful with oxygen in the treatment of certain cases of respiratory obstruction, and as a vehicle for general anesthetics.	Helium-4,Helium 4
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328	Adult	A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available.	Adults