Canadian Association of Radiologists journal = Journal l'Association canadienne des radiologistes
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Randomized Controlled Trial Comparative Study Clinical Trial
A prospective randomized clinical trial comparing two film-screen systems for chest radiography.
To compare conventional and asymmetric film-screen chest radiography systems in a prospective, randomized trial. ⋯ In general, the asymmetric system was superior for assessing mediastinal features and inferior for assessing the lateral subpleural zones in the posteroanterior radiographs. The asymmetric system was superior for assessing retrosternal lung markings and inferior for assessing fissures in the lateral radiographs. The results for the posteroanterior radiographs were consistent with the results of nonblinded studies reported elsewhere.
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To examine the effect of variations in anatomic features and operator experience on the success and complication rates of sonographically monitored cannulation of the internal jugular vein. ⋯ Real-time ultrasound monitoring is superior to blind techniques in cannulation of the internal jugular vein because of its ease, accuracy and safety. Sonographic real-time monitoring minimizes the impact of anatomic factors on success and complication rates. It is a safe and efficacious approach that should be preferred in the placement of central lines.
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To determine the long-term clinical and radiographic outcome of patients who undergo insertion of a Gianturco-Roehm Bird's Nest vena caval filter (Cook Inc., Bloomington, Ind.). ⋯ In this small group of patients the Bird's Nest filter was effective in preventing recurrent pulmonary embolism and caused less caval thrombosis than has previously been suspected, although intrafilter clot was found in 25% of the patients who underwent follow-up imaging. Colour Doppler imaging is the method of choice for detecting nonocclusive thrombus with this type of filter. Perforation of the caval wall was universal but not clinically symptomatic. Finally, guidelines should be established to ensure the cost-effective use of inferior vena caval filters in ICU patients.