Ventilation perfusion

См. также в других словарях:

• Ventilation-perfusion inequality — (also known as Ventilation Perfusion Mismatch) is when certain groups of alveoli experience a decrease in ventilation which causes a higher concentration of carbon dioxide (CO2) and a lower concentration of oxygen (O2). The inequality refers to… …   Wikipedia

• Ventilation/perfusion ratio — In respiratory physiology, the ventilation/perfusion ratio (or V/Q ratio) is a measurement used to assess the efficiency and adequacy of the matching of two variables: [LoyolaMedEd|Medicine/pulmonar/physio/pf9.htm#q1] * V ventilation the air… …   Wikipedia

• Ventilation/perfusion scan — A ventilation/perfusion lung scan, also called a V/Q lung scan, is a type of medical imaging used to evaluate the circulation of air and blood within a patient s lungs. The ventilation part of the test looks at the ability of air to reach all… …   Wikipedia

• ventilation-perfusion scanning — a nuclear medicine technique in which two different isotopes are used, one inhaled (usually xenon 133 or krypton 81m), to examine lung ventilation, and one injected, to examine lung perfusion. In pulmonary embolism, the area of lung supplied by… …   Medical dictionary

• ventilation-perfusion scanning — V/Q scanning a nuclear medicine technique in which two different isotopes are used, one inhaled (usually xenon 133 or krypton 81m), to examine lung ventilation, and one injected, to examine lung perfusion. In pulmonary embolism, the area of lung… …   The new mediacal dictionary

• ventilation-perfusion scan — V/Q scan a scintigraphic technique for demonstrating perfusion defects in normally ventilated areas of the lung in the diagnosis of pulmonary embolism, consisting of the imaging of the distribution of an inhaled radionuclide followed by the… …   Medical dictionary

• ventilation/perfusion mismatch — An imbalance between alveolar ventilation and pulmonary capillary blood flow …   Medical dictionary

• ventilation-perfusion ratio — the ratio of oxygen received in the pulmonary alveoli to the flow of blood through the corresponding alveolar capillaries …   Medical dictionary

• Perfusion scanning — Perfusion is defined as the passage of fluid through the lymphatic system or blood vessels to an organ or a tissue. [American Psychological Association (APA):perfusion. (n.d.). Dictionary.com Unabridged (v 1.1). Retrieved March 20, 2008, from… …   Wikipedia

• Ventilation — The exchange of air between the lungs and the atmosphere so that oxygen can be exchanged for carbon dioxide in the alveoli (the tiny air sacs in the lungs). In pulmonary medicine, a distinction is made between pulmonary and alveolar ventilation.… …   Medical dictionary

• ventilation — n. 1) the passage of air into and out of the respiratory tract. The air that reaches only as far as the conducting airways cannot take part in gas exchange and is known as dead space ventilation – this may be reduced by performing a tracheostomy …   The new mediacal dictionary