*Article* **Mild Traumatic Brain Injury in Older Adults: Are Routine Second cCT Scans Necessary?**

**Valeska Hofmann 1,\*, Christian Deininger 2, Stefan Döbele 1, Christian Konrads <sup>1</sup> and Florian Wichlas <sup>2</sup>**

<sup>2</sup> Department of Orthopedics and Traumatology, University Hospital Salzburg, 5020 Salzburg, Austria; christian.deininger@hotmail.com (C.D.); fwichlas@icloud.com (F.W.)

**\*** Correspondence: hofmann\_valeska@gmx.net

**Abstract:** Fall-related hospitalizations among older adults have been increasing in recent decades. One of the most common reasons for this is minimal or mild traumatic brain injury (mTBI) in older individuals taking anticoagulant medication. In this study, we analyzed all inpatient stays from January 2017 to December 2019 of patients aged > 75 years with a mTBI on anticoagulant therapy who received at least two cranial computer tomography (cCT) scans. Of 1477 inpatient stays, 39 had primary cranial bleeding, and in 1438 the results of initial scans were negative for cranial bleeding. Of these 1438 cases, 6 suffered secondary bleeding from the control cCT scan. There was no significance for bleeding related to the type of anticoagulation. We conclude that geriatric patients under anticoagulant medication don't need a second cCT scan if the primary cCT was negative for intracranial bleeding and the patient shows no clinical signs of bleeding. These patients can be dismissed but require an evaluation for need of home care or protective measures to prevent recurrent falls. The type of anticoagulant medication does not affect the risk of bleeding.

**Keywords:** anticoagulation; concussion; geriatric trauma; overdiagnosis
