Evaluation of Circulating Osteogenic Factors in Trauma Patients

Study Overview
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Brief Summary
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Bone fractures in traumatic brain-injured and spinal cord-injured patients often heal faster than in other patients. However, such patients are also occasionally prone to bone formation in soft tissues such as muscle. This process is called heterotopic ossification and tends to occur around joints. Patients with heterotopic ossification often suffer from complications such nerve compression, ankylosis, chronic pain, osteoporosis, and infections. Loss of movement can also interfere with function and the quality of life of patients already experiencing difficulties associated with their trauma. Positioning, transfers, and hygiene become difficult and even impossible, which worsens the loss of autonomy. Previous research has suggested that an osteoinductive factor (which has the capacity to induce the formation of bone) may be released into the bloodstream following a head or spinal cord injury. The investigators laboratory has shown that a growth factor called BMP-9, when injected into a damaged mouse muscle, has the ability to cause strong ossification in damaged muscle. The investigators would like to find out whether the levels of BMP-9 and/or its receptor (which is called ALK1) increase after traumatic brain and spinal cord injuries that occur at the same time as serious orthopaedic traumas. The main goal of the investigators study is thus to determine whether BMP-9 levels increase in the serum of trauma patients.

Official Title
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Evaluation of Circulating Osteogenic Factors in Trauma Patients (BMP-9)

Conditions
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Healthy, High Velocity Fracture, Cranial Trauma, Spinal Trauma

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: cranial trauma with Glasgow =< 8 spinal trauma with ASIA A, B, C high-velocity fracture of femur, tibia, pelvis Exclusion Criteria: brain dead pathological fractures (cancer, osteoporosis) blood transfusion received pregnancy

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| cranial trauma and fracture<br>Individuals presenting a cranial trauma that are classified at equal to or less than 8 on the Glasgow scale, combined with a fracture to the femur, tibia, or pelvis resulting from a high-velocity impact | |
| cranial trauma<br>Individuals presenting a cranial trauma that are classified at equal to or less than 8 on the Glasgow scale | |
| spinal trauma with fracture<br>Individuals presenting a spinal fracture that are classified with an ASIA score of A, B, or C, combined with a fracture to the femur, tibia, or pelvis resulting from a high-velocity impact | |
| spinal trauma<br>Individuals presenting a spinal fracture that are classified with an ASIA score of A, B, or C | |
| high velocity fracture, inferior limb<br>Individuals that present a fracture to the femur, tibia, or pelvis resulting from a high-velocity impact | |
| Control<br>Healthy individuals | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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cranial trauma with or without high velocity fracture to inferior limb, spinal trauma with or without high velocity fracture to inferior limb, high velocity fracture to inferior limb