Pulmonary Perfusion Scan
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Estudo radiológico comparativo e pulmonar funcional em crianças e adolescentes com diagnóstico de bronquiolite obliterante pós-infecciosa
A bronquiolite obliterante pós-infecciosa é considerada uma complicação rara da bronquiolite viral aguda, ocorrendo em aproximadamente 1% dos casos. No entanto, observa-se que em países situados no hemisfério sul essa doença vem ocorrendo com maior freqüência. É uma doença que se caracteriza por obstrução fixa e irreversível do fluxo aéreo, co
Publicado em: 2009
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2. Fuzzy modeling of electrical impedance tomography images of the lungs
OBJECTIVES: Aiming to improve the anatomical resolution of electrical impedance tomography images, we developed a fuzzy model based on electrical impedance tomography's high temporal resolution and on the functional pulmonary signals of perfusion and ventilation. INTRODUCTION: Electrical impedance tomography images carry information about both ventilation an
Clinics. Publicado em: 2008
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3. Uso da cintilografia pulmonar com cortes tomograficos na previsão da função pulmonar pos-opratoria em pacientes com cancer de pulmão
Perfusion scintigraphy is the commonest method used for the regional assessment of pulmonary function in candidates for pulmonary resection with borderline respiratory function. This method provides two-dimensional images, and it considers all the segments of the pulmonary lobes as having the same volume and function, without considering the spatial overlapp
Publicado em: 2005
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4. Non-invasive assessment of pulmonary blood supply after staged repair of pulmonary atresia.
Radionuclide studies were performed to determine pulmonary blood flow in six children who had undergone surgery for pulmonary atresia, ventricular septal defect, and hypoplastic pulmonary arteries with or without major aortopulmonary collateral arteries. Lung blood flow was assessed from both particle perfusion lung scans and the pulmonary and systemic phase
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5. Role of spiral volumetric computed tomographic scanning in the assessment of patients with clinical suspicion of pulmonary embolism and an abnormal ventilation/perfusion lung scan.
BACKGROUND: A study was carried out to evaluate the potential place of spiral volumetric computed tomography (SVCT) in the diagnostic strategy for pulmonary embolism. METHODS: In a prospective study 249 patients with clinical suspicion of pulmonary embolism were evaluated with various imaging techniques. In all patients a ventilation/perfusion (V/Q) scan was
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6. Successful stenting of a pulmonary arterial stenosis after a single lung transplant.
A 44 year old patient with end stage idiopathic pulmonary fibrosis underwent single left lung transplantation. A perfusion lung scan performed 13 days after transplantation revealed deficient perfusion in the transplanted lung. Pulmonary angiography showed severe pulmonary artery anastomotic stenosis. Percutaneous insertion of a balloon expandable stent impr
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7. Perfusion Lung Scans Provide a Guide to Which Patients With Apparent Primary Pulmonary Hypertension Merit Angiography
There is hesitancy, based on the perceived risk, to do pulmonary angiography in patients believed to have primary pulmonary hypertension. Yet pulmonary hypertension due to major-vessel, chronic thromboembolism mimics primary pulmonary hypertension clinically and on standard laboratory tests. Because thromboembolic pulmonary hypertension is potentially remedi
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8. Computer analysis of ventilation-perfusion scans for detection and assessment of lung disease.
A previously reported computer analysis has been used to provide numerical ventilation-perfusion lung scan data, for comparison with tests of airways function and results of arterial blood gas analysis in 11 patients with pulmonary embolism, 18 with asthma, and 37 with chronic obstructive lung disease. In pulmonary embolism an index of underperfusion showed
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9. Pulmonary Embolism after Pacemaker Implantation
One day after implantation of a permanent pacemaker in an 82-year-old man, transthoracic echocardiography showed a mass in the right ventricle and a small pericardial effusion. Transesophageal echocardiography revealed a mass attached to the pacemaker lead. Subcutaneous administration of enoxaparin was begun, and the patient remained free of symptoms for the
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10. Plasma cross linked fibrin degradation products in pulmonary embolism.
Plasma concentrations of cross linked fibrin degradation products, a marker of intravascular thrombosis and fibrinolysis, were measured in 495 patients with suspected pulmonary embolism referred for ventilation-perfusion lung scanning to determine whether concentrations are increased in pulmonary embolism and their potential use in diagnosis. Lung scans were
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11. Recurrent pulmonary thromboembolism presenting with cardiac arrhythmias.
Pulmonary emboli seldom recur, and when recurrence does occur it is not associated with permanent sequelae unless there is progressive pulmonary arterial hypertension. Five patients with clinical and perfusion lung scan evidence of recurrent pulmonary embolism presented with abnormal cardiac rhythms without evidence of progressive pulmonary hypertension. Twe
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12. Perfusion/ventilation mismatch during exercise in chronic heart failure: an investigation of circulatory determinants.
BACKGROUND--The ventilatory cost of carbon dioxide (CO2) elimination on exercise (VE/VCO2) is increased in chronic heart failure (CHF). This reflects increased physiological dead space ventilation secondary to mismatching between perfusion and ventilation during exercise. The objectives of this study were to investigate the relation of this increased VE/VCO2