• Sara Esmaeili, Mohammad Mojtahed, Zahra Mirzaasgari, Gholamreza Masoumi, Seyedeh Niloufar Rafiee Alavi, Meysam Abolmaali, Samira Chaibakhsh, Mahya Naderkhani, Ali Famouri, Sepideh Allahdadian, Saeid Gholami Gharab, Mohammad Taghi Joghataei, Mohammad Reza Motamed, Aram Zabeti, and Peyman Shirani.
• Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran; School of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran; Department of Neurology, Firoozgar Hospital, Iran University of Medical Sciences, Tehran, Iran.
• Am J Emerg Med. 2022 May 1; 55: 174-179.

PurposeTimely identification and treatment of intracranial hematomas in patients with brain injury is essential for successful treatment. This study evaluates Infra-scanner as a handy medical screening tool for diagnosing, on-site, cerebral hematomas in patients with head injury.Materials And MethodsPatients referred to the emergency department of university hospitals with mild to moderate brain trauma, up to 12 h from injury were included. NIR sensors of infra-scan device were placed on the right and left frontal, temporal, peritoneal and occipital parts of the head and light absorption was recorded. Positive or negative cerebral hemorrhage cases were compared with contrast-enhanced CT scan results as the gold standard. Diagnostic parameters of the device and cases related to bleeding were analyzed and reported.ResultsA total of 300 patients were studied. Sensitivity of the infrasound scanner in the Iranian study population was 94.8 (95% CI: 88% -100) and its specificity was 86.9 (95% CI: 79% -99% 99). Negative predictive value (NPV) was 90.3% and positive predictive value (PPV) was 92.9%. Sensitivity in men (95.7%) (95%CI, 90% -1) was more than women (95% CI, 81% -99%)90%. At the ages of less than 36 years, sensitivity (95.3%) and specificity (87.1%) were more than sensitivity (94.4%) and specificity (86.5%) over 36 years old. If the test had been performed in less than / equal to two hours from trauma, the sensitivity (94.9%) and the specificity (92%) were greater than the sensitivity (94.6%) and the specificity (75%) during when the scan had been performed in more than two hours from trauma. In general, in extra-axial bleeding including EDH, SAH, SDH, the sensitivity was 95.1% and the specificity was 84.5%, while in intra-axial bleeding, including ICH and IVH, the sensitivity was lower (93.9%) and the specificity was 91.7. The sensitivity of the device in detecting bleeding in the occipital lobe (95.8%) was higher than other brain lobes.ConclusionThis study shows that Infra-scanner is useful in initial examination and screening of patients with head injury and can be used as an adjunct to a CT scan or when not available and may allow earlier treatment which reduce the secondary damage to the hematoma.Copyright © 2021. Published by Elsevier Inc.

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