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Quick Medical Diagnosis & Treatment
Superior Vena Caval Obstruction
Sections: Key Features, Clinical Findings, Diagnosis, Treatment,
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Topics Discussed: superior vena cava syndrome.
Excerpt: | |  Chest radiographs and a CT scan define the location and often the nature of the obstructive process
Contrast venography or magnetic resonance venography map out the extent and degree of the venous obstruction and the collateral circulation Brachial venography or radionuclide scanning following intravenous injection of technetium Tc99m pertechnetate demonstrates a block to the flow of contrast material into the right heart and enlarged collateral veins These techniques allow estimation of blood flow around the occlusion as well as serial evaluation of the response to therapy Bronchoscopy is often performed Transbronchial biopsy is relatively contraindicated because of venous hypertension and the risk of bleeding |
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