From the Guidelines
It can take anywhere from 2-4 weeks for small, superficial hematomas to resolve, while larger or more serious intracranial hematomas may take 3-6 months or longer to resolve. The resolution time for a hematoma after a blunt head injury varies significantly depending on its size, location, and severity. According to the study by 1, the subacute phase of a blunt head trauma, which can include the resolution of a hematoma, typically occurs between 8 days and 1 month after the initial traumatic event. During this phase, up to 30% of contusions may cause worsening mass effect with edema from toxic metabolites released into the surrounding tissue and cerebral autoregulation dysfunction. Some key factors that influence the resolution time of a hematoma include:
- Size and location of the hematoma
- Severity of the injury
- Patient's age and overall health
- Use of blood-thinning medications
- Presence of underlying conditions affecting blood clotting or healing It is essential for patients to rest adequately, avoid activities that risk additional head trauma, and may use acetaminophen for pain relief (avoiding aspirin or NSAIDs which can increase bleeding risk) during the recovery process. Any worsening symptoms like severe headache, confusion, vomiting, seizures, or neurological changes warrant immediate medical attention, as these could indicate complications requiring urgent intervention.
From the Research
Resolution Time for Hematoma after Blunt Head Injury
The time it takes for a hematoma to resolve after a blunt head injury can vary depending on several factors, including the size and location of the hematoma, as well as the individual's overall health.
- A study published in 2017 2 reported a case of a subgaleal hematoma that resolved within 3 months with conservative management.
- Another study from 1991 3 described a case of a massive subgaleal hematoma in a 23-month-old child that resolved over a period of two weeks.
- There is no specific timeframe provided in the other studies 4, 5, 6 for the resolution of hematomas after blunt head injuries, as they focus on different aspects of such injuries, including observations on injuries by blunt objects, identity of growing pulsatile mass lesions, and life-threatening large subcutaneous hematomas.
Factors Influencing Resolution Time
Several factors can influence the resolution time of a hematoma, including:
- Size and location of the hematoma
- Individual's overall health and presence of any underlying conditions
- Effectiveness of treatment and management
- Presence of any complications or secondary injuries
Importance of Medical Attention
It is essential to seek medical attention immediately if a hematoma is suspected after a blunt head injury, as prompt treatment and management can help prevent complications and promote resolution.
- A study from 2015 6 highlights the importance of careful follow-up in young patients with connective tissue disease who experience large subcutaneous hematomas, as these can be fatal.
- The study from 2017 2 emphasizes the need for emergency physicians to be aware of subgaleal hematomas and to manage them effectively to prevent complications.