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- Diffusing_capacity abstract "Diffusing capacity (DLCO) measures the transfer of gas from air in the lung, to the red blood cells in lung blood vessels. It is part of a comprehensive series of tests (pulmonary function testing) to determine the overall ability of the lung to transport gas into and out of the blood. DLCO is reduced in certain diseases of the lung and heart. (DLCO) measurement has been standardized according to a position paper by a task force of the European Respiratory and American Thoracic Societies.In respiratory physiology, the diffusing capacity has a long history of great utility, representing conductance of gas across the alveolar-capillary membrane and also takes into account factors affecting the behaviour of a given gas with hemoglobin[citation needed].The term may be considered a misnomer as it represents neither diffusion nor a capacity (as it is typically measured under submaximal conditions) nor capacitance. In addition, gas transport is only diffusion limited in extreme cases, such as for oxygen uptake at very low ambient oxygen or very high pulmonary blood flow. While the term diffusing capacity is retained in the United States for reasons of historical continuity, terminology using transfer factor is now preferred in Europe and elsewhere. Nevertheless, there are 7 - 8 times more citations for the original terminology in PubMed, so any change in usage will be slow to happen[citation needed].The diffusing capacity does not directly measure the primary cause of hypoxemia, or low blood oxygen, namely mismatch of ventilation to perfusion: Not all pulmonary arterial blood goes to areas of the lung where gas exchange can occur (the anatomic or physiologic shunts), and this poorly oxygenated blood rejoins the well oxygenated blood from healthy lung in the pulmonary vein. Together, the mixture has less oxygen than that blood from the healthy lung alone, and so is hypoxemic. Similarly, not all inspired air goes to areas of the lung where gas exchange can occur (the anatomic and the physiological dead spaces), and so is wasted.↑ ↑".
- Diffusing_capacity wikiPageExternalLink ersnet.org.
- Diffusing_capacity wikiPageExternalLink the-aps.org.
- Diffusing_capacity wikiPageExternalLink thoracic.org.
- Diffusing_capacity wikiPageExternalLink cpgs.
- Diffusing_capacity wikiPageID "195745".
- Diffusing_capacity wikiPageRevisionID "605154567".
- Diffusing_capacity hasPhotoCollection Diffusing_capacity.
- Diffusing_capacity meshid "D011653".
- Diffusing_capacity name "Diffusion capacity".
- Diffusing_capacity othercodes "CPT: 94720".
- Diffusing_capacity subject Category:Respiratory_physiology.
- Diffusing_capacity comment "Diffusing capacity (DLCO) measures the transfer of gas from air in the lung, to the red blood cells in lung blood vessels. It is part of a comprehensive series of tests (pulmonary function testing) to determine the overall ability of the lung to transport gas into and out of the blood. DLCO is reduced in certain diseases of the lung and heart.".
- Diffusing_capacity label "Diffusing capacity".
- Diffusing_capacity label "弥散量".
- Diffusing_capacity sameAs Capacidade_de_difusão.
- Diffusing_capacity sameAs m.01btdf.
- Diffusing_capacity sameAs Q11067835.
- Diffusing_capacity sameAs Q11067835.
- Diffusing_capacity wasDerivedFrom Diffusing_capacity?oldid=605154567.
- Diffusing_capacity isPrimaryTopicOf Diffusing_capacity.