Automated Extracranial Internal Carotid Artery Ultrasound Sensor for Traumatic Brain Injury
Traumatic brain injury (TBI) affects 1.7 million people in the United States each year, resulting in 2.5 million emergency department visits, 280,000 hospitalizations, >50,000 deaths, and more than $60 billion in economic cost. TBI also affects >30,000 military personnel annually and almost 8% of veterans who received care between 2001 and 2011. Post-traumatic neurologic outcome depends on the severity of initial injuries and the extent of secondary cerebral damage. Ischemia is the most common and devastating secondary insult. Ischemic brain damage has been identified histologically in ~90% of patients who died following closed head injury, and several studies have associated low cerebral blood flow (CBF) with poor outcome. Specifically, CBF of less than 200 ml/min has been shown to be the critical lower threshold for survival in neurointensive care patients. In addition to intracranial hypertension and cerebral edema, systemic hypotension and reduced cardiac output contribute substantially to posttraumatic cerebral ischemia. Additionally, the carotid artery is the most common site of blunt cerebral vascular injury (BCVI), which may further compromise CBF and cause subsequent death or debilitating stroke. Specifically, high grade internal carotid arterial (ICA) injuries are associated with the highest mortality and stroke rate.
The investigators' goal is to develop of a wearable noninvasive, continuous, automated ultrasound sensor to accurately measure extracranial ICA flow volume. In doing so, the investigators aim to enable early detection of CBF compromise, thereby preventing secondary ischemic injuries in TBI patients. To achieve this goal, the investigators plan to first build a prototype wearable ICA ultrasound senor with integrated signal processing platform, then test its accuracy in an in vitro system and healthy human subjects.
Studieoversigt
Status
Betingelser
Intervention / Behandling
Undersøgelsestype
Fase
- Ikke anvendelig
Deltagelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
- Healthy volunteers
- Age 18 or older
Exclusion Criteria:
- Claustrophobic
- Hyperventilation or panic disorders
- Pregnant
- Have metal implants or cannot pass the MRI screening questions
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Diagnostisk
- Tildeling: N/A
- Interventionel model: Enkelt gruppeopgave
- Maskning: Ingen (Åben etiket)
Våben og indgreb
Deltagergruppe / Arm |
Intervention / Behandling |
|---|---|
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Eksperimentel: Healthy subjects
Healthy adult volunteers (age 18 or greater) that are not claustrophobic, do not have hyperventilation or panic disorders, not pregnant, have no metal implants and can pass the MRI screening questions.
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The investigators' goal is to develop a wearable noninvasive, continuous, automated ultrasound sensor to accurately measure arterial blood flow volume outside of the head.
Ultrasound uses sound waves to create a picture.
In doing so, the investigators hope to detect CBF compromise early, preventing secondary injuries in TBI patients.
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Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Internal carotid artery blood flow
Tidsramme: 5 minutes before ultrasound or MRI measurement until 15 minutes after the measurement
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The investigators will measure volume of blood flow through the extracranial internal carotid artery using the ultrasound sensor and MRI
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5 minutes before ultrasound or MRI measurement until 15 minutes after the measurement
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Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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End tidal CO2 level
Tidsramme: 5 minutes before ultrasound or MRI measurement until 15 minutes after the measurement
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End tidal carbon dioxide level during normal, hypoventilation, and hyperventilation
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5 minutes before ultrasound or MRI measurement until 15 minutes after the measurement
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Samarbejdspartnere og efterforskere
Sponsor
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Primær færdiggørelse (Faktiske)
Studieafslutning (Faktiske)
Datoer for studieregistrering
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
- HUM00137659
Plan for individuelle deltagerdata (IPD)
Planlægger du at dele individuelle deltagerdata (IPD)?
Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter
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