Metallic Hyperdensity Sign on Noncontrast CT Immediately after Mechanical Thrombectomy Predicts Parenchymal Hemorrhage in Patients with Acute Large-Artery Occlusion
| Autor: | Xiaoxian Gong, Min Lou, Ying Zhou, C. Xu, Wansi Zhong, Xinfa Ding, Ruiting Zhang, Zhicai Chen |
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| Rok vydání: | 2018 |
| Předmět: |
Male
medicine.medical_specialty Sensitivity and Specificity 030218 nuclear medicine & medical imaging Parenchymal hemorrhage Lesion 03 medical and health sciences 0302 clinical medicine Occlusion medicine Humans Radiology Nuclear Medicine and imaging In patient Severe complication Aged Cerebral Hemorrhage Retrospective Studies Thrombectomy Aged 80 and over Interventional business.industry Large artery occlusion Retrospective cohort study Middle Aged Mechanical thrombectomy Stroke Female Neurology (clinical) Radiology medicine.symptom business Tomography X-Ray Computed 030217 neurology & neurosurgery |
| Zdroj: | AJNR. American journal of neuroradiology. 40(4) |
| ISSN: | 1936-959X |
| Popis: | BACKGROUND AND PURPOSE: Parenchymal hemorrhage is a severe complication following mechanical recanalization in patients with acute ischemic stroke with large-vessel occlusion. This study aimed to assess whether the metallic hyperdensity sign on noncontrast CT performed immediately after mechanical thrombectomy can predict parenchymal hemorrhage at 24 hours. MATERIALS AND METHODS: We included consecutive patients with acute ischemic stroke with large-vessel occlusion who underwent noncontrast CT immediately after mechanical thrombectomy between January 2014 and September 2018. The metallic hyperdensity sign was defined as a nonpetechial intracerebral hyperdense lesion (diameter, ≥1 cm) in the basal ganglia and a maximum CT density of >90 HU. The sensitivity, specificity, and positive and negative predictive values of the metallic hyperdensity sign in predicting parenchymal hemorrhage were calculated. RESULTS: A total of 198 patients were included. The metallic hyperdensity sign was found in 59 (29.7%) patients, and 51 (25.7%) patients had parenchymal hemorrhage at 24 hours. Patients with the metallic hyperdensity sign are more likely to have parenchymal hemorrhage than those without it (76.3% versus 4.3%, P < .001). The sensitivity, specificity, positive predictive value, and negative predictive value of the metallic hyperdensity sign in predicting parenchymal hemorrhage were 88.2%, 90.5%, 76.3%, and 95.7%, respectively. CONCLUSIONS: The presence of the metallic hyperdensity sign on noncontrast CT performed immediately after mechanical thrombectomy in patients with large-vessel occlusion could predict the occurrence of parenchymal hemorrhage at 24 hours, which might be helpful in postinterventional management within 24 hours after mechanical thrombectomy. |
| Databáze: | OpenAIRE |
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