LOINC Code 33868-1: Maximum blood flow velocity ICA at maximum stenosis/Maximum blood flow velocity unobstructed CCA by US

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Blood flow velocity.max.stenosis.internal carotid artery/Blood flow velocity.max.unobstructed.common carotid artery. It is commonly used with the system or sample type {Circulatory system}.

When is it used?

• Used in lab systems, EHRs, and clinical data exchange.
• May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
• Status: ACTIVE
• Order vs observation: Observation
• Method: US

What it does not mean

• The code identifies the observation or test, not the actual result.

Key facts

• Maximum blood flow velocity ICA at maximum stenosis/Maximum blood flow velocity unobstructed CCA by US
• Blood flow velocity.max.stenosis.internal carotid artery/Blood flow velocity.max.unobstructed.common carotid artery
• The Peak Velocity at the point of maximum stenosis in the internal carotid artery overt the Peak Velocity in the unobstructed common carotid artery two cm or more proximal to the bifurcation.
• Bld flow; Bld flow vel; Bld flow.velocity; CCA; Circ; Circ sys; Dynamic; Echography; GENERAL ULTRASOUND; ICA; Largest; Maximal; Maximum; Peak; Peak velocity; Point in time; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; ULS; Ultrasound; Vel; Velocity ratio; Vmax; Vmax ICA

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Frequently asked questions