Automated Extracranial Internal Carotid Artery Ultrasound Sensor for Traumatic Brain Injury

University of Michigan

Status: Withdrawn

Conditions: Traumatic Brain Injury

Treatments: Device: Automated extracranial internal carotid artery ultrasound sensor

Study type: Interventional

Funder types: Other

Identifiers

NCT03482206

HUM00137659

Details and patient eligibility

About

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.

Sex: All

Ages: 18+ years old

Volunteers: Accepts Healthy Volunteers

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

Trial design

Primary purpose: Diagnostic

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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0 participants in 1 patient group

Healthy subjects

Experimental group

Description:

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.

Treatment:

Device: Automated extracranial internal carotid artery ultrasound sensor