Diagnostic Performance of the S100B Protein in the Prognosis of Patients With Mild Head Trauma With Risk of Complications in Patients Over 65 Years Old.

Study Overview
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Brief Summary
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For patients with mild head trauma, a large number of CT scans are performed. The S100B protein allows, when the dosage is below the threshold, to rule out the diagnosis of brain damage with a negative predictive value of 98%. In patients over 65 years old it was found that the dosage of S100B came back positive more often compared to a younger population. This study proposes to determine the positivity threshold value for S100B dosage in patients over 65 years old. In patients over 65 years suffering from mild head trauma, a head CT will systematically be performed (in accordance with the recommendations) and the S100B will be measured (taken from an additional tube on the blood test carried out in these patients). The results of the TDM will then be compared with the results of the S100B to determine the values of sensitivity, specificity, negative and positive predictive value of different thresholds.

Official Title
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Diagnostic Performance of the S100B Protein in the Prognosis of Patients With Mild Head Trauma With Risk of Complications in Patients Over 65 Years Old.

Conditions
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Mild Head Trauma With Risk of Complications

Intervention / Treatment
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* Diagnostic Test: Diagnostic performance of the S100B protein dosage


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Male or female aged 65 or more Patients going to the emergency for a mild head trauma with risk of complication and treated within 3 hours of the head injury, according to the following criteria: Adult patients with head trauma presenting: Retrograde amnesia lasting more than 30 min, Or A loss of consciousness or amnesia of the facts Or Glasgow score <15 to 2 hours from traumatism Speaking and reading French Subject having expressed his non-opposition to the research or non-opposition given by a trusted person / member of his family in cases where the patient is not in a position to express his non-opposition. Subject affiliated to a social health insurance protection scheme Exclusion Criteria: Severe head trauma Mild head trauma without risk of complication Patient under the protection of justice Patient under guardianship, curatorship Subject in exclusion period (determined by a previous or current study)

Ages Eligible for Study
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Minimum Age: 62 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Patients over 65 years old who have undergone a mild head trauma.<br> | Diagnostic Test: Diagnostic performance of the S100B protein dosage<br>* Dosage of the S100B protein in patients with mild head trauma with complication risks<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The threshold of the S100B protein |  | This outcome measure is assessed on Day 1. | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| - Sensitivity (Se) and Specificity (Sp) of the S100B protein in the differential diagnosis of bleeding - Positive predictive value and negative predictive value of the S100B protein in the differential diagnosis of hemorrhage | Sensitivity (Se) and Specificity (Sp) of the S100B protein in the differential diagnosis of bleeding in patients over 65 years old who have undergone a mild head trauma. Positive predictive value and negative predictive value of the S100B protein in the differential diagnosis of hemorrhage in patients over 65 years old who have undergone a mild head trauma. | This outcome measure is assessed on Day 1. |