Contrecoup Injury Management Guidelines

Initial Assessment and Imaging

All patients with suspected contrecoup injury must undergo brain CT without delay to identify primary brain lesions including epidural hematomas, subdural hematomas, and parenchymal contusions 2, 3
CT imaging should use inframillimetric sections with double fenestration (central nervous system and bone windows) as the reference standard 1
Consider CT-angiography if risk factors for vascular injury exist, including cervical spine fracture, focal neurological deficits not explained by brain imaging, or basal skull fractures 1

Outpatient management is only appropriate after initial hospital evaluation confirms normal or minimal findings on CT scan with no mass effect, no midline shift, and no significant hematoma 4
Patients must have a Glasgow Coma Scale of 15 with no neurological deficits, although this fact is not directly cited, it is implied through the context of necessary conditions for outpatient management
No signs of increased intracranial pressure (pupillary abnormalities, hypertension, bradycardia) 1, 5
Hemodynamic stability with systolic blood pressure >110 mmHg 6, 3

Minimum 24-hour hospital observation is essential for any patient with documented contrecoup injury on CT, even if initially asymptomatic 1

Strict return precautions: immediate return for worsening headache, vomiting, confusion, seizures, focal weakness, or vision changes 1, 5
Neurological checks every 2-4 hours for first 48 hours at home by a responsible adult 1

Avoid activities that increase intracranial pressure: no heavy lifting, straining, or Valsalva maneuvers for 2-4 weeks 1
No contact sports or high-risk activities for minimum 4-6 weeks until cleared by neurosurgery 5
Avoid anticoagulants and antiplatelet agents unless absolutely necessary 7