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Abnormal Vq Scan
VQ scan...: There are 2 parts to a VQ scan: ventilation and perfusion. If there is a clot present, the scan will show that areas of the lung are being ventilated but not perfused. In other words, the clot is preventing blood flow in an area that is being ventilated. This is the classic finding for a pe in a VQ scan but not all scans are that clear-cut so additional testing is sometimes needed. ...Read moreSee 2 more doctor answers
Vent. perfusion scan: Perfusion ventilation scan is used to define certain lung diseases.The most common use for diagnosis of pulmonary embolism.Scanning combines ventilation scan, usually radioactive gas xenon 33, and tc99m maa (particles injected intravenously) for perfusion. Typically compares areas of deficient perfusion with areas of ventilation. Embolism usually multiple perfusion defects not ventilated. ...Read moreSee 1 more doctor answer
Ventilation: Ventilation part of study is inhaled gas such as xenon 33. Perfusion portion of study with tc99m maa is injected through peripheral vein such as arm. Volume of injection is quite small. ...Read more
Two steps procedure: A lung scintigraphy has two components. The ventilation part (v of v/q) which consists in inhalation of 99mtc-gaz or aerosols and the perfusion part ( q of v/q) which involves the intravenous injection of 99mtc-maa which are used to see the perfusion of the lungs. Usually a lung scan is performed to detect pulmonary emboli ( blood clots in the lungs) or to perform a preoperative evaluation ...Read moreSee 1 more doctor answer
Compare 2 studies: First part of study is usually inhaling gas isotope such as xenon 133. Several breaths are taken and imaging of inhalation, exhalation, and equilibrium are performed.Second part of study is intravenous injection of isotope tc99m maa into peripheral vein and subsequent imaging of lung perfusion in multiple projections.Mostly used for detectiong of pulmonary embolism. Vent./ perfusion scan compared. ...Read more
Blood clots: V/q scans are most commonly used to diagnosis pulmonary emboli ( blood clots in the arteries of the lungs) . When these clots exist there is a miss/match between the ventllation of air thru your lungs and blood flow to your lungs .. When this happens you become short of oxygen/breath .. If the "miss-match" is severe enough.. This could even be fatal. ...Read moreSee 1 more doctor answer
Air flow: A VQ scan looks at ventilation, and perfusion(blood flow) to the lungs. In the ventilation scan, a patient will be asked to breath in either a fine mist, or a gas (xenon). The pattern on the image gives information about how well the lungs are ventilating and looks to see if there are areas which are not getting air. If the gas was used, we also get information about air trapping. ...Read moreSee 2 more doctor answers
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