LOINCActiveObservation

LOINC Code 33869-9: Maximum blood flow velocity Kidney artery/Aorta by US

33869-9 is a LOINC code used to identify Maximum blood flow velocity Kidney artery/Aorta by US in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. 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.kidney artery/Blood flow velocity.max.aorta. It is commonly used with the system or sample type {Circulatory system}.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

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.kidney artery/Blood flow velocity.max.aorta. 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 Kidney artery/Aorta by US
  • Blood flow velocity.max.kidney artery/Blood flow velocity.max.aorta
  • Ratio of the renal artery blood flow peak velocity to the the aorta peak velocity
  • Bld flow; Bld flow vel; Bld flow.velocity; Circ; Circ sys; Dynamic; Echography; GENERAL ULTRASOUND; Largest; Maximal; Maximum; Peak; Peak velocity; Point in time; QNT; Quan; Quant; Quantitative; Random; Renal; Sonogram; Sonograph; Sonography; ULS; Ultrasound; Vel; Velocity ratio; Vmax; Vmax kidney a

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

Maximum blood flow velocity Kidney artery/Aorta by USVmax kidney a/Aorta USBlood flow velocity.max.kidney artery/Blood flow velocity.max.aortaGEN.USVelRtoPt{Circulatory system}

Frequently asked questions

Code details

Code33869-9
SystemLOINC
Display nameMaximum blood flow velocity Kidney artery/Aorta by US
DescriptionBlood flow velocity.max.kidney artery/Blood flow velocity.max.aorta
Short nameVmax kidney a/Aorta US
ComponentBlood flow velocity.max.kidney artery/Blood flow velocity.max.aorta
PropertyVelRto
TimingPt
System (specimen){Circulatory system}
ScaleQn
MethodUS
ClassGEN.US
Example unitsratio
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.09
Last changed2.67

Part names

Blood flow velocity.max.kidney artery/Blood flow velocity.max.aortaVelRtoPt{Circulatory system}QnUSVelocity RatioPoint in time (spot)Ultrasound

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

LOINC Code 33869-9 | HealthAssure