Experience with 81 gas computed tomography (CT) cisternography procedures in 79 patients in searching for acoustic neuroma is reported. Twenty-one tumors, four exclusively intracanalicular, were demonstrated after standard contrast-enhanced CT was negative. Fifty-five examinations were negative ; four were inconclusive. The high resolution scanner with digital localization and reconstruction zoom capability greatly improved image detail. In nine of the 12 normal patients examined with it, the intracanalicular bundle was demonstrated. Substitution of carbon dioxide for air greatly reduced the morbidity of acute post-spinal tap headache. The procedure takes 30-45 min and can be performed on an outpatient basis. It is recommended as the procedure of choice when standard CT is negative in subjects clinically suspected of having acoustic neuroma.
Alt complicationswere recorded from the initial 2488 cases studied with digital intravenous angiography (DIVA) at New York University Medical Center. Mechanisms of producing these reactions were categorized into procedure-related, contrast-mediumrelated, or disease-related.The complications included extravasation of contrast matonal into the arm (1 1 patients) and mediastinum (two), acute pulmonary edema (four), hypotension (23), thrombophlebitis (two), and grand mal seizure (one). Recommendations are made that would allow DIVA to be performed more safely.In a relatively short period of time digital intravenous angiography (DIVA) has become a prime radiologic method for the study of the intracranial, extracranial [1][2][3][4][5][6][7], and peripheral vasculature [8-1 5]. It is our purpose to report on the complications of DIVA in the first 2488 cases studied at our institution.We have attempted to categorize these complications as procedure-related, contrast-medium-related, or disease-related.
Materials and MethodsThis article appears in the September/Octotier 1984 issue of AJNR and the December 1984 issue of AJR.
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