CAROTID DUPLEX PROTOCOL - asnweb.org

[Pages:74]CAROTID DUPLEX PROTOCOL

Sheldon Boston, RCS, RVS Houston Methodist Hospital

Houston, Texas Date

No Disclosures

Houston Methodist Hospital

DeBakey Heart and Vascular Center

? Houston Methodist comprises of 7 hospitals, several emergency centers, imaging centers and physical therapy clinics throughout greater Houston area. Houston Methodist Hospital has 900 licensed beds.

DeBakey Heart and Vascular Center ? 24 hour vascular ultrasound lab ? 16 full time vascular technologists ? 17,000 peripheral vascular exams in

performed 2018 ? Exam modalities include carotid duplex,

transcranial Doppler (routine & intraop), AVG/AVF, venous reflux, IVC, aorta-iliac duplex, upper/lower venous duplex, arterial duplex, physiologic arterial exams and vein mappings

Carotid Duplex Exam

What is It?

? The combination of real-time B-mode imaging with pulsed wave and color Doppler to evaluate the cervical carotid artery for disease states and/or stenosis

? Doppler measures speed of the moving red blood cells through the vessels

Indications

? Cerebrovascular accident (CVA) ? Transient ischemic attacks (TIA) ? Syncope ? Visual disturbances ? Carotid bruit ? Follow up of known stenosis ? Post-op or post-intervention surveillance (Carotid

endarterectomy, stent, bypass) ? Trauma ? Pulsatile neck mass

Contraindications/Limitations

? Patients with extensive bandages or cervical collars ? Patients with neck IV ? Uncooperative /confused patients ? Patients who cannot be adequately positioned. ? Acoustic shadowing from calcification ? Postoperative hematoma, dressing and surgical

sutures ? Poor visualization due to vessel depth (Short neck,

obesity, high bifurcation)

Equipment & Supplies

? Duplex ultrasound system with appropriate pulsed wave probe, frequencies ranging from 4-9MHz

? Ultrasound gel ? Towels for clean up ? Vital signs monitor (BP)

Exam Preparation

Patient history and physical findings ? Technologist should obtain information from

patients or medical staff about indications and symptoms. ? Evaluate and document identification of physical findings. (facial drooping, slurred speech) ? Obtain bilateral brachial artery blood pressures ? Review patient medical history (TIA, CVA, HTN) ? Review to prior studies if available.

 ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download