Comparison of Imaging Strategies with Conditional versus Immediate Contrast-Enhanced Computed Tomography in Patients with Clinical Suspicion of Acute Appendicitis View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2015-08

AUTHORS

J. J. Atema, S. L. Gans, A. Van Randen, W. Laméris, H. W. van Es, J. P. M. van Heesewijk, B. van Ramshorst, W. H. Bouma, W. ten Hove, E. M. van Keulen, M. G. W. Dijkgraaf, P. M. M. Bossuyt, J. Stoker, M. A. Boermeester

ABSTRACT

OBJECTIVES: To compare the diagnostic accuracy of conditional computed tomography (CT), i.e. CT when initial ultrasound findings are negative or inconclusive, and immediate CT for patients with suspected appendicitis. METHODS: Data were collected within a prospective diagnostic accuracy study on imaging in adults with acute abdominal pain. All patients underwent ultrasound and CT, read by different observers who were blinded from the other modality. Only patients with clinical suspicion of appendicitis were included. An expert panel assigned a final diagnosis to each patient after 6 months of follow-up (clinical reference standard). RESULTS: A total of 422 patients were included with final diagnosis appendicitis in 251 (60 %). For 199 patients (47 %), ultrasound findings were inconclusive or negative. Conditional CT imaging correctly identified 241 of 251 (96 %) appendicitis cases (95 %CI, 92 % to 98 %), versus 238 (95 %) with immediate CT (95 %CI, 91 % to 97 %). The specificity of conditional CT imaging was lower: 77 % (95 %CI, 70 % to 83 %) versus 87 % for immediate CT (95 %CI, 81 % to 91 %). CONCLUSION: A conditional CT strategy correctly identifies as many patients with appendicitis as an immediate CT strategy, and can halve the number of CTs needed. However, conditional CT imaging results in more false positives. KEY POINTS: • Conditional CT (CT after negative/inconclusive ultrasound findings) can be used for suspected appendicitis. • Half the number of CT examinations is needed with a conditional strategy. • Conditional CT correctly identifies as many patients with appendicitis as immediate CT. • Conditional imaging results in more false positive appendicitis cases. More... »

PAGES

2445-2452

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s00330-015-3648-9

DOI

http://dx.doi.org/10.1007/s00330-015-3648-9

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1019464715

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/25903701


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    "description": "OBJECTIVES: To compare the diagnostic accuracy of conditional computed tomography (CT), i.e. CT when initial ultrasound findings are negative or inconclusive, and immediate CT for patients with suspected appendicitis.\nMETHODS: Data were collected within a prospective diagnostic accuracy study on imaging in adults with acute abdominal pain. All patients underwent ultrasound and CT, read by different observers who were blinded from the other modality. Only patients with clinical suspicion of appendicitis were included. An expert panel assigned a final diagnosis to each patient after 6\u00a0months of follow-up (clinical reference standard).\nRESULTS: A total of 422 patients were included with final diagnosis appendicitis in 251 (60\u00a0%). For 199 patients (47\u00a0%), ultrasound findings were inconclusive or negative. Conditional CT imaging correctly identified 241 of 251 (96\u00a0%) appendicitis cases (95 %CI, 92\u00a0% to 98\u00a0%), versus 238 (95\u00a0%) with immediate CT (95 %CI, 91\u00a0% to 97\u00a0%). The specificity of conditional CT imaging was lower: 77\u00a0% (95 %CI, 70\u00a0% to 83\u00a0%) versus 87\u00a0% for immediate CT (95 %CI, 81\u00a0% to 91\u00a0%).\nCONCLUSION: A conditional CT strategy correctly identifies as many patients with appendicitis as an immediate CT strategy, and can halve the number of CTs needed. However, conditional CT imaging results in more false positives.\nKEY POINTS: \u2022 Conditional CT (CT after negative/inconclusive ultrasound findings) can be used for suspected appendicitis. \u2022 Half the number of CT examinations is needed with a conditional strategy. \u2022 Conditional CT correctly identifies as many patients with appendicitis as immediate CT. \u2022 Conditional imaging results in more false positive appendicitis cases.", 
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