Abstract:
:Microwave radiometry is a passive and noninvasive technique that allows quick detection of subcutaneous temperature changes. The feasibility of this technique for differentiating normal intravenous infusions of radiographic contrast medium from extravasations of contrast medium was tested in anesthetized dogs. Room-temperature and heated ionic and nonionic contrast media were administered at flow rates ranging from 0.2 to 9.9 mL/sec by means of a power injector. On the basis of these experiments, an algorithm to adjust for extravasation detection thresholds as a function of injection flow rates was developed. With this algorithm, results showed a false-positive rate of 0% at all infusion rates and false-negative rates of 2%, 2%, and 4% at pump speeds of 0.2, 1.0, and 9.9 mL/sec, respectively. The times of these extravasation "alarms" corresponded to maximum extravasated volumes, respectively, of 4, 6.5, and 8 mL. Microwave radiometry has clinical potential for early detection of extravasation of contrast medium administered with power injectors.
journal_name
Radiologyjournal_title
Radiologyauthors
Shaeffer J,Sigfred SV,Sevcik MA,Grabowy RS,Gemmell LA,Hirschman ADdoi
10.1148/radiology.184.1.1609070subject
Has Abstractpub_date
1992-07-01 00:00:00pages
141-4issue
1eissn
0033-8419issn
1527-1315journal_volume
184pub_type
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